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-rw-r--r--arch/c6x/Kconfig174
-rw-r--r--arch/c6x/Makefile60
-rw-r--r--arch/c6x/boot/Makefile30
-rw-r--r--arch/c6x/boot/dts/dsk6455.dts62
-rw-r--r--arch/c6x/boot/dts/evmc6457.dts48
-rw-r--r--arch/c6x/boot/dts/evmc6472.dts73
-rw-r--r--arch/c6x/boot/dts/evmc6474.dts58
-rw-r--r--arch/c6x/boot/dts/tms320c6455.dtsi96
-rw-r--r--arch/c6x/boot/dts/tms320c6457.dtsi68
-rw-r--r--arch/c6x/boot/dts/tms320c6472.dtsi134
-rw-r--r--arch/c6x/boot/dts/tms320c6474.dtsi89
-rw-r--r--arch/c6x/boot/linked_dtb.S2
-rw-r--r--arch/c6x/configs/dsk6455_defconfig44
-rw-r--r--arch/c6x/configs/evmc6457_defconfig41
-rw-r--r--arch/c6x/configs/evmc6472_defconfig42
-rw-r--r--arch/c6x/configs/evmc6474_defconfig42
-rw-r--r--arch/c6x/include/asm/Kbuild54
-rw-r--r--arch/c6x/include/asm/asm-offsets.h1
-rw-r--r--arch/c6x/include/asm/bitops.h105
-rw-r--r--arch/c6x/include/asm/byteorder.h12
-rw-r--r--arch/c6x/include/asm/cache.h90
-rw-r--r--arch/c6x/include/asm/cacheflush.h65
-rw-r--r--arch/c6x/include/asm/checksum.h34
-rw-r--r--arch/c6x/include/asm/clkdev.h22
-rw-r--r--arch/c6x/include/asm/clock.h148
-rw-r--r--arch/c6x/include/asm/delay.h67
-rw-r--r--arch/c6x/include/asm/dma-mapping.h91
-rw-r--r--arch/c6x/include/asm/dscr.h34
-rw-r--r--arch/c6x/include/asm/elf.h113
-rw-r--r--arch/c6x/include/asm/ftrace.h6
-rw-r--r--arch/c6x/include/asm/hardirq.h20
-rw-r--r--arch/c6x/include/asm/irq.h302
-rw-r--r--arch/c6x/include/asm/irqflags.h72
-rw-r--r--arch/c6x/include/asm/linkage.h30
-rw-r--r--arch/c6x/include/asm/megamod-pic.h9
-rw-r--r--arch/c6x/include/asm/mmu.h18
-rw-r--r--arch/c6x/include/asm/module.h33
-rw-r--r--arch/c6x/include/asm/mutex.h6
-rw-r--r--arch/c6x/include/asm/page.h11
-rw-r--r--arch/c6x/include/asm/pgtable.h81
-rw-r--r--arch/c6x/include/asm/processor.h132
-rw-r--r--arch/c6x/include/asm/procinfo.h28
-rw-r--r--arch/c6x/include/asm/prom.h1
-rw-r--r--arch/c6x/include/asm/ptrace.h174
-rw-r--r--arch/c6x/include/asm/sections.h12
-rw-r--r--arch/c6x/include/asm/setup.h32
-rw-r--r--arch/c6x/include/asm/sigcontext.h80
-rw-r--r--arch/c6x/include/asm/signal.h17
-rw-r--r--arch/c6x/include/asm/soc.h35
-rw-r--r--arch/c6x/include/asm/string.h21
-rw-r--r--arch/c6x/include/asm/swab.h54
-rw-r--r--arch/c6x/include/asm/syscall.h123
-rw-r--r--arch/c6x/include/asm/syscalls.h55
-rw-r--r--arch/c6x/include/asm/system.h168
-rw-r--r--arch/c6x/include/asm/thread_info.h121
-rw-r--r--arch/c6x/include/asm/timer64.h6
-rw-r--r--arch/c6x/include/asm/timex.h33
-rw-r--r--arch/c6x/include/asm/tlb.h8
-rw-r--r--arch/c6x/include/asm/traps.h36
-rw-r--r--arch/c6x/include/asm/uaccess.h107
-rw-r--r--arch/c6x/include/asm/unaligned.h170
-rw-r--r--arch/c6x/include/asm/unistd.h26
-rw-r--r--arch/c6x/kernel/Makefile12
-rw-r--r--arch/c6x/kernel/asm-offsets.c123
-rw-r--r--arch/c6x/kernel/c6x_ksyms.c66
-rw-r--r--arch/c6x/kernel/devicetree.c53
-rw-r--r--arch/c6x/kernel/dma.c153
-rw-r--r--arch/c6x/kernel/entry.S803
-rw-r--r--arch/c6x/kernel/head.S84
-rw-r--r--arch/c6x/kernel/irq.c728
-rw-r--r--arch/c6x/kernel/module.c123
-rw-r--r--arch/c6x/kernel/process.c265
-rw-r--r--arch/c6x/kernel/ptrace.c187
-rw-r--r--arch/c6x/kernel/setup.c510
-rw-r--r--arch/c6x/kernel/signal.c377
-rw-r--r--arch/c6x/kernel/soc.c91
-rw-r--r--arch/c6x/kernel/switch_to.S74
-rw-r--r--arch/c6x/kernel/sys_c6x.c74
-rw-r--r--arch/c6x/kernel/time.c65
-rw-r--r--arch/c6x/kernel/traps.c423
-rw-r--r--arch/c6x/kernel/vectors.S81
-rw-r--r--arch/c6x/kernel/vmlinux.lds.S162
-rw-r--r--arch/c6x/lib/Makefile7
-rw-r--r--arch/c6x/lib/checksum.c36
-rw-r--r--arch/c6x/lib/csum_64plus.S419
-rw-r--r--arch/c6x/lib/divi.S53
-rw-r--r--arch/c6x/lib/divremi.S46
-rw-r--r--arch/c6x/lib/divremu.S87
-rw-r--r--arch/c6x/lib/divu.S98
-rw-r--r--arch/c6x/lib/llshl.S37
-rw-r--r--arch/c6x/lib/llshr.S38
-rw-r--r--arch/c6x/lib/llshru.S38
-rw-r--r--arch/c6x/lib/memcpy_64plus.S46
-rw-r--r--arch/c6x/lib/mpyll.S49
-rw-r--r--arch/c6x/lib/negll.S31
-rw-r--r--arch/c6x/lib/pop_rts.S32
-rw-r--r--arch/c6x/lib/push_rts.S31
-rw-r--r--arch/c6x/lib/remi.S64
-rw-r--r--arch/c6x/lib/remu.S82
-rw-r--r--arch/c6x/lib/strasgi.S89
-rw-r--r--arch/c6x/lib/strasgi_64plus.S39
-rw-r--r--arch/c6x/mm/Makefile5
-rw-r--r--arch/c6x/mm/dma-coherent.c143
-rw-r--r--arch/c6x/mm/init.c113
-rw-r--r--arch/c6x/platforms/Kconfig16
-rw-r--r--arch/c6x/platforms/Makefile12
-rw-r--r--arch/c6x/platforms/cache.c445
-rw-r--r--arch/c6x/platforms/dscr.c598
-rw-r--r--arch/c6x/platforms/emif.c87
-rw-r--r--arch/c6x/platforms/megamod-pic.c349
-rw-r--r--arch/c6x/platforms/platform.c17
-rw-r--r--arch/c6x/platforms/pll.c444
-rw-r--r--arch/c6x/platforms/plldata.c404
-rw-r--r--arch/c6x/platforms/timer64.c244
114 files changed, 12579 insertions, 0 deletions
diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
new file mode 100644
index 00000000000..26e67f0f005
--- /dev/null
+++ b/arch/c6x/Kconfig
@@ -0,0 +1,174 @@
+#
+# For a description of the syntax of this configuration file,
+# see Documentation/kbuild/kconfig-language.txt.
+#
+
+config TMS320C6X
+ def_bool y
+ select CLKDEV_LOOKUP
+ select GENERIC_IRQ_SHOW
+ select HAVE_ARCH_TRACEHOOK
+ select HAVE_DMA_API_DEBUG
+ select HAVE_GENERIC_HARDIRQS
+ select HAVE_MEMBLOCK
+ select HAVE_SPARSE_IRQ
+ select OF
+ select OF_EARLY_FLATTREE
+
+config MMU
+ def_bool n
+
+config ZONE_DMA
+ def_bool y
+
+config FPU
+ def_bool n
+
+config HIGHMEM
+ def_bool n
+
+config NUMA
+ def_bool n
+
+config RWSEM_GENERIC_SPINLOCK
+ def_bool y
+
+config RWSEM_XCHGADD_ALGORITHM
+ def_bool n
+
+config GENERIC_CALIBRATE_DELAY
+ def_bool y
+
+config GENERIC_HWEIGHT
+ def_bool y
+
+config GENERIC_CLOCKEVENTS
+ def_bool y
+
+config GENERIC_CLOCKEVENTS_BROADCAST
+ bool
+
+config GENERIC_BUG
+ def_bool y
+
+config COMMON_CLKDEV
+ def_bool y
+
+config C6X_BIG_KERNEL
+ bool "Build a big kernel"
+ help
+ The C6X function call instruction has a limited range of +/- 2MiB.
+ This is sufficient for most kernels, but some kernel configurations
+ with lots of compiled-in functionality may require a larger range
+ for function calls. Use this option to have the compiler generate
+ function calls with 32-bit range. This will make the kernel both
+ larger and slower.
+
+ If unsure, say N.
+
+source "init/Kconfig"
+
+# Use the generic interrupt handling code in kernel/irq/
+
+source "kernel/Kconfig.freezer"
+
+config CMDLINE_BOOL
+ bool "Default bootloader kernel arguments"
+
+config CMDLINE
+ string "Kernel command line"
+ depends on CMDLINE_BOOL
+ default "console=ttyS0,57600"
+ help
+ On some architectures there is currently no way for the boot loader
+ to pass arguments to the kernel. For these architectures, you should
+ supply some command-line options at build time by entering them
+ here.
+
+config CMDLINE_FORCE
+ bool "Force default kernel command string"
+ depends on CMDLINE_BOOL
+ default n
+ help
+ Set this to have arguments from the default kernel command string
+ override those passed by the boot loader.
+
+config CPU_BIG_ENDIAN
+ bool "Build big-endian kernel"
+ default n
+ help
+ Say Y if you plan on running a kernel in big-endian mode.
+ Note that your board must be properly built and your board
+ port must properly enable any big-endian related features
+ of your chipset/board/processor.
+
+config FORCE_MAX_ZONEORDER
+ int "Maximum zone order"
+ default "13"
+ help
+ The kernel memory allocator divides physically contiguous memory
+ blocks into "zones", where each zone is a power of two number of
+ pages. This option selects the largest power of two that the kernel
+ keeps in the memory allocator. If you need to allocate very large
+ blocks of physically contiguous memory, then you may need to
+ increase this value.
+
+ This config option is actually maximum order plus one. For example,
+ a value of 11 means that the largest free memory block is 2^10 pages.
+
+menu "Processor type and features"
+
+source "arch/c6x/platforms/Kconfig"
+
+config TMS320C6X_CACHES_ON
+ bool "L2 cache support"
+ default y
+
+config KERNEL_RAM_BASE_ADDRESS
+ hex "Virtual address of memory base"
+ default 0xe0000000 if SOC_TMS320C6455
+ default 0xe0000000 if SOC_TMS320C6457
+ default 0xe0000000 if SOC_TMS320C6472
+ default 0x80000000
+
+source "mm/Kconfig"
+
+source "kernel/Kconfig.preempt"
+
+source "kernel/Kconfig.hz"
+source "kernel/time/Kconfig"
+
+endmenu
+
+menu "Executable file formats"
+
+source "fs/Kconfig.binfmt"
+
+endmenu
+
+source "net/Kconfig"
+
+source "drivers/Kconfig"
+
+source "fs/Kconfig"
+
+source "security/Kconfig"
+
+source "crypto/Kconfig"
+
+source "lib/Kconfig"
+
+menu "Kernel hacking"
+
+source "lib/Kconfig.debug"
+
+config ACCESS_CHECK
+ bool "Check the user pointer address"
+ default y
+ help
+ Usually the pointer transfer from user space is checked to see if its
+ address is in the kernel space.
+
+ Say N here to disable that check to improve the performance.
+
+endmenu
diff --git a/arch/c6x/Makefile b/arch/c6x/Makefile
new file mode 100644
index 00000000000..1d08dd07027
--- /dev/null
+++ b/arch/c6x/Makefile
@@ -0,0 +1,60 @@
+#
+# linux/arch/c6x/Makefile
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+
+cflags-y += -mno-dsbt -msdata=none
+
+cflags-$(CONFIG_C6X_BIG_KERNEL) += -mlong-calls
+
+CFLAGS_MODULE += -mlong-calls -mno-dsbt -msdata=none
+
+CHECKFLAGS +=
+
+KBUILD_CFLAGS += $(cflags-y)
+KBUILD_AFLAGS += $(cflags-y)
+
+ifdef CONFIG_CPU_BIG_ENDIAN
+KBUILD_CFLAGS += -mbig-endian
+KBUILD_AFLAGS += -mbig-endian
+LINKFLAGS += -mbig-endian
+KBUILD_LDFLAGS += -mbig-endian
+LDFLAGS += -EB
+endif
+
+head-y := arch/c6x/kernel/head.o
+core-y += arch/c6x/kernel/ arch/c6x/mm/ arch/c6x/platforms/
+libs-y += arch/c6x/lib/
+
+# Default to vmlinux.bin, override when needed
+all: vmlinux.bin
+
+boot := arch/$(ARCH)/boot
+
+# Are we making a dtbImage.<boardname> target? If so, crack out the boardname
+DTB:=$(subst dtbImage.,,$(filter dtbImage.%, $(MAKECMDGOALS)))
+export DTB
+
+ifneq ($(DTB),)
+core-y += $(boot)/
+endif
+
+# With make 3.82 we cannot mix normal and wildcard targets
+
+vmlinux.bin: vmlinux
+ $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
+
+dtbImage.%: vmlinux
+ $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
+
+archclean:
+ $(Q)$(MAKE) $(clean)=$(boot)
+
+define archhelp
+ @echo ' vmlinux.bin - Binary kernel image (arch/$(ARCH)/boot/vmlinux.bin)'
+ @echo ' dtbImage.<dt> - ELF image with $(arch)/boot/dts/<dt>.dts linked in'
+ @echo ' - stripped elf with fdt blob'
+endef
diff --git a/arch/c6x/boot/Makefile b/arch/c6x/boot/Makefile
new file mode 100644
index 00000000000..ecca820e604
--- /dev/null
+++ b/arch/c6x/boot/Makefile
@@ -0,0 +1,30 @@
+#
+# Makefile for bootable kernel images
+#
+
+OBJCOPYFLAGS_vmlinux.bin := -O binary
+$(obj)/vmlinux.bin: vmlinux FORCE
+ $(call if_changed,objcopy)
+
+DTC_FLAGS ?= -p 1024
+
+ifneq ($(DTB),)
+obj-y += linked_dtb.o
+endif
+
+$(obj)/%.dtb: $(src)/dts/%.dts FORCE
+ $(call cmd,dtc)
+
+quiet_cmd_cp = CP $< $@$2
+ cmd_cp = cat $< >$@$2 || (rm -f $@ && echo false)
+
+# Generate builtin.dtb from $(DTB).dtb
+$(obj)/builtin.dtb: $(obj)/$(DTB).dtb
+ $(call if_changed,cp)
+
+$(obj)/linked_dtb.o: $(obj)/builtin.dtb
+
+$(obj)/dtbImage.%: vmlinux
+ $(call if_changed,objcopy)
+
+clean-files := $(obj)/*.dtb
diff --git a/arch/c6x/boot/dts/dsk6455.dts b/arch/c6x/boot/dts/dsk6455.dts
new file mode 100644
index 00000000000..2b71f800618
--- /dev/null
+++ b/arch/c6x/boot/dts/dsk6455.dts
@@ -0,0 +1,62 @@
+/*
+ * arch/c6x/boot/dts/dsk6455.dts
+ *
+ * DSK6455 Evaluation Platform For TMS320C6455
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ *
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ */
+
+/dts-v1/;
+
+/include/ "tms320c6455.dtsi"
+
+/ {
+ model = "Spectrum Digital DSK6455";
+ compatible = "spectrum-digital,dsk6455";
+
+ chosen {
+ bootargs = "root=/dev/nfs ip=dhcp rw";
+ };
+
+ memory {
+ device_type = "memory";
+ reg = <0xE0000000 0x08000000>;
+ };
+
+ soc {
+ megamod_pic: interrupt-controller@1800000 {
+ interrupts = < 12 13 14 15 >;
+ };
+
+ emifa@70000000 {
+ flash@3,0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "cfi-flash";
+ reg = <0x3 0x0 0x400000>;
+ bank-width = <1>;
+ device-width = <1>;
+ partition@0 {
+ reg = <0x0 0x400000>;
+ label = "NOR";
+ };
+ };
+ };
+
+ timer1: timer@2980000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 69 >;
+ };
+
+ clock-controller@029a0000 {
+ clock-frequency = <50000000>;
+ };
+ };
+};
diff --git a/arch/c6x/boot/dts/evmc6457.dts b/arch/c6x/boot/dts/evmc6457.dts
new file mode 100644
index 00000000000..0301eb9a8ff
--- /dev/null
+++ b/arch/c6x/boot/dts/evmc6457.dts
@@ -0,0 +1,48 @@
+/*
+ * arch/c6x/boot/dts/evmc6457.dts
+ *
+ * EVMC6457 Evaluation Platform For TMS320C6457
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ *
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ */
+
+/dts-v1/;
+
+/include/ "tms320c6457.dtsi"
+
+/ {
+ model = "eInfochips EVMC6457";
+ compatible = "einfochips,evmc6457";
+
+ chosen {
+ bootargs = "console=hvc root=/dev/nfs ip=dhcp rw";
+ };
+
+ memory {
+ device_type = "memory";
+ reg = <0xE0000000 0x10000000>;
+ };
+
+ soc {
+ megamod_pic: interrupt-controller@1800000 {
+ interrupts = < 12 13 14 15 >;
+ };
+
+ timer0: timer@2940000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 67 >;
+ };
+
+ clock-controller@29a0000 {
+ clock-frequency = <60000000>;
+ };
+ };
+};
diff --git a/arch/c6x/boot/dts/evmc6472.dts b/arch/c6x/boot/dts/evmc6472.dts
new file mode 100644
index 00000000000..3e207b449a9
--- /dev/null
+++ b/arch/c6x/boot/dts/evmc6472.dts
@@ -0,0 +1,73 @@
+/*
+ * arch/c6x/boot/dts/evmc6472.dts
+ *
+ * EVMC6472 Evaluation Platform For TMS320C6472
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ *
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ */
+
+/dts-v1/;
+
+/include/ "tms320c6472.dtsi"
+
+/ {
+ model = "eInfochips EVMC6472";
+ compatible = "einfochips,evmc6472";
+
+ chosen {
+ bootargs = "console=hvc root=/dev/nfs ip=dhcp rw";
+ };
+
+ memory {
+ device_type = "memory";
+ reg = <0xE0000000 0x10000000>;
+ };
+
+ soc {
+ megamod_pic: interrupt-controller@1800000 {
+ interrupts = < 12 13 14 15 >;
+ };
+
+ timer0: timer@25e0000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 16 >;
+ };
+
+ timer1: timer@25f0000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 16 >;
+ };
+
+ timer2: timer@2600000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 16 >;
+ };
+
+ timer3: timer@2610000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 16 >;
+ };
+
+ timer4: timer@2620000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 16 >;
+ };
+
+ timer5: timer@2630000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 16 >;
+ };
+
+ clock-controller@29a0000 {
+ clock-frequency = <25000000>;
+ };
+ };
+};
diff --git a/arch/c6x/boot/dts/evmc6474.dts b/arch/c6x/boot/dts/evmc6474.dts
new file mode 100644
index 00000000000..4dc291292bc
--- /dev/null
+++ b/arch/c6x/boot/dts/evmc6474.dts
@@ -0,0 +1,58 @@
+/*
+ * arch/c6x/boot/dts/evmc6474.dts
+ *
+ * EVMC6474 Evaluation Platform For TMS320C6474
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ *
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ */
+
+/dts-v1/;
+
+/include/ "tms320c6474.dtsi"
+
+/ {
+ model = "Spectrum Digital EVMC6474";
+ compatible = "spectrum-digital,evmc6474";
+
+ chosen {
+ bootargs = "console=hvc root=/dev/nfs ip=dhcp rw";
+ };
+
+ memory {
+ device_type = "memory";
+ reg = <0x80000000 0x08000000>;
+ };
+
+ soc {
+ megamod_pic: interrupt-controller@1800000 {
+ interrupts = < 12 13 14 15 >;
+ };
+
+ timer3: timer@2940000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 39 >;
+ };
+
+ timer4: timer@2950000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 41 >;
+ };
+
+ timer5: timer@2960000 {
+ interrupt-parent = <&megamod_pic>;
+ interrupts = < 43 >;
+ };
+
+ clock-controller@29a0000 {
+ clock-frequency = <50000000>;
+ };
+ };
+};
diff --git a/arch/c6x/boot/dts/tms320c6455.dtsi b/arch/c6x/boot/dts/tms320c6455.dtsi
new file mode 100644
index 00000000000..a804ec1e018
--- /dev/null
+++ b/arch/c6x/boot/dts/tms320c6455.dtsi
@@ -0,0 +1,96 @@
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ device_type = "cpu";
+ model = "ti,c64x+";
+ reg = <0>;
+ };
+ };
+
+ soc {
+ compatible = "simple-bus";
+ model = "tms320c6455";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ core_pic: interrupt-controller {
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ compatible = "ti,c64x+core-pic";
+ };
+
+ /*
+ * Megamodule interrupt controller
+ */
+ megamod_pic: interrupt-controller@1800000 {
+ compatible = "ti,c64x+megamod-pic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ reg = <0x1800000 0x1000>;
+ interrupt-parent = <&core_pic>;
+ };
+
+ cache-controller@1840000 {
+ compatible = "ti,c64x+cache";
+ reg = <0x01840000 0x8400>;
+ };
+
+ emifa@70000000 {
+ compatible = "ti,c64x+emifa", "simple-bus";
+ #address-cells = <2>;
+ #size-cells = <1>;
+ reg = <0x70000000 0x100>;
+ ranges = <0x2 0x0 0xa0000000 0x00000008
+ 0x3 0x0 0xb0000000 0x00400000
+ 0x4 0x0 0xc0000000 0x10000000
+ 0x5 0x0 0xD0000000 0x10000000>;
+
+ ti,dscr-dev-enable = <13>;
+ ti,emifa-burst-priority = <255>;
+ ti,emifa-ce-config = <0x00240120
+ 0x00240120
+ 0x00240122
+ 0x00240122>;
+ };
+
+ timer1: timer@2980000 {
+ compatible = "ti,c64x+timer64";
+ reg = <0x2980000 0x40>;
+ ti,dscr-dev-enable = <4>;
+ };
+
+ clock-controller@029a0000 {
+ compatible = "ti,c6455-pll", "ti,c64x+pll";
+ reg = <0x029a0000 0x200>;
+ ti,c64x+pll-bypass-delay = <1440>;
+ ti,c64x+pll-reset-delay = <15360>;
+ ti,c64x+pll-lock-delay = <24000>;
+ };
+
+ device-state-config-regs@2a80000 {
+ compatible = "ti,c64x+dscr";
+ reg = <0x02a80000 0x41000>;
+
+ ti,dscr-devstat = <0>;
+ ti,dscr-silicon-rev = <8 28 0xf>;
+ ti,dscr-rmii-resets = <0 0x40020 0x00040000>;
+
+ ti,dscr-locked-regs = <0x40008 0x40004 0x0f0a0b00>;
+ ti,dscr-devstate-ctl-regs =
+ <0 12 0x40008 1 0 0 2
+ 12 1 0x40008 3 0 30 2
+ 13 2 0x4002c 1 0xffffffff 0 1>;
+ ti,dscr-devstate-stat-regs =
+ <0 10 0x40014 1 0 0 3
+ 10 2 0x40018 1 0 0 3>;
+ };
+ };
+};
diff --git a/arch/c6x/boot/dts/tms320c6457.dtsi b/arch/c6x/boot/dts/tms320c6457.dtsi
new file mode 100644
index 00000000000..35f40709a71
--- /dev/null
+++ b/arch/c6x/boot/dts/tms320c6457.dtsi
@@ -0,0 +1,68 @@
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ device_type = "cpu";
+ model = "ti,c64x+";
+ reg = <0>;
+ };
+ };
+
+ soc {
+ compatible = "simple-bus";
+ model = "tms320c6457";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ core_pic: interrupt-controller {
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ compatible = "ti,c64x+core-pic";
+ };
+
+ megamod_pic: interrupt-controller@1800000 {
+ compatible = "ti,c64x+megamod-pic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ interrupt-parent = <&core_pic>;
+ reg = <0x1800000 0x1000>;
+ };
+
+ cache-controller@1840000 {
+ compatible = "ti,c64x+cache";
+ reg = <0x01840000 0x8400>;
+ };
+
+ device-state-controller@2880800 {
+ compatible = "ti,c64x+dscr";
+ reg = <0x02880800 0x400>;
+
+ ti,dscr-devstat = <0x20>;
+ ti,dscr-silicon-rev = <0x18 28 0xf>;
+ ti,dscr-mac-fuse-regs = <0x114 3 4 5 6
+ 0x118 0 0 1 2>;
+ ti,dscr-kick-regs = <0x38 0x83E70B13
+ 0x3c 0x95A4F1E0>;
+ };
+
+ timer0: timer@2940000 {
+ compatible = "ti,c64x+timer64";
+ reg = <0x2940000 0x40>;
+ };
+
+ clock-controller@29a0000 {
+ compatible = "ti,c6457-pll", "ti,c64x+pll";
+ reg = <0x029a0000 0x200>;
+ ti,c64x+pll-bypass-delay = <300>;
+ ti,c64x+pll-reset-delay = <24000>;
+ ti,c64x+pll-lock-delay = <50000>;
+ };
+ };
+};
diff --git a/arch/c6x/boot/dts/tms320c6472.dtsi b/arch/c6x/boot/dts/tms320c6472.dtsi
new file mode 100644
index 00000000000..b488aaec65c
--- /dev/null
+++ b/arch/c6x/boot/dts/tms320c6472.dtsi
@@ -0,0 +1,134 @@
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ device_type = "cpu";
+ reg = <0>;
+ model = "ti,c64x+";
+ };
+ cpu@1 {
+ device_type = "cpu";
+ reg = <1>;
+ model = "ti,c64x+";
+ };
+ cpu@2 {
+ device_type = "cpu";
+ reg = <2>;
+ model = "ti,c64x+";
+ };
+ cpu@3 {
+ device_type = "cpu";
+ reg = <3>;
+ model = "ti,c64x+";
+ };
+ cpu@4 {
+ device_type = "cpu";
+ reg = <4>;
+ model = "ti,c64x+";
+ };
+ cpu@5 {
+ device_type = "cpu";
+ reg = <5>;
+ model = "ti,c64x+";
+ };
+ };
+
+ soc {
+ compatible = "simple-bus";
+ model = "tms320c6472";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ core_pic: interrupt-controller {
+ compatible = "ti,c64x+core-pic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ };
+
+ megamod_pic: interrupt-controller@1800000 {
+ compatible = "ti,c64x+megamod-pic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ reg = <0x1800000 0x1000>;
+ interrupt-parent = <&core_pic>;
+ };
+
+ cache-controller@1840000 {
+ compatible = "ti,c64x+cache";
+ reg = <0x01840000 0x8400>;
+ };
+
+ timer0: timer@25e0000 {
+ compatible = "ti,c64x+timer64";
+ ti,core-mask = < 0x01 >;
+ reg = <0x25e0000 0x40>;
+ };
+
+ timer1: timer@25f0000 {
+ compatible = "ti,c64x+timer64";
+ ti,core-mask = < 0x02 >;
+ reg = <0x25f0000 0x40>;
+ };
+
+ timer2: timer@2600000 {
+ compatible = "ti,c64x+timer64";
+ ti,core-mask = < 0x04 >;
+ reg = <0x2600000 0x40>;
+ };
+
+ timer3: timer@2610000 {
+ compatible = "ti,c64x+timer64";
+ ti,core-mask = < 0x08 >;
+ reg = <0x2610000 0x40>;
+ };
+
+ timer4: timer@2620000 {
+ compatible = "ti,c64x+timer64";
+ ti,core-mask = < 0x10 >;
+ reg = <0x2620000 0x40>;
+ };
+
+ timer5: timer@2630000 {
+ compatible = "ti,c64x+timer64";
+ ti,core-mask = < 0x20 >;
+ reg = <0x2630000 0x40>;
+ };
+
+ clock-controller@29a0000 {
+ compatible = "ti,c6472-pll", "ti,c64x+pll";
+ reg = <0x029a0000 0x200>;
+ ti,c64x+pll-bypass-delay = <200>;
+ ti,c64x+pll-reset-delay = <12000>;
+ ti,c64x+pll-lock-delay = <80000>;
+ };
+
+ device-state-controller@2a80000 {
+ compatible = "ti,c64x+dscr";
+ reg = <0x02a80000 0x1000>;
+
+ ti,dscr-devstat = <0>;
+ ti,dscr-silicon-rev = <0x70c 16 0xff>;
+
+ ti,dscr-mac-fuse-regs = <0x700 1 2 3 4
+ 0x704 5 6 0 0>;
+
+ ti,dscr-rmii-resets = <0x208 1
+ 0x20c 1>;
+
+ ti,dscr-locked-regs = <0x200 0x204 0x0a1e183a
+ 0x40c 0x420 0xbea7
+ 0x41c 0x420 0xbea7>;
+
+ ti,dscr-privperm = <0x41c 0xaaaaaaaa>;
+
+ ti,dscr-devstate-ctl-regs = <0 13 0x200 1 0 0 1>;
+ };
+ };
+};
diff --git a/arch/c6x/boot/dts/tms320c6474.dtsi b/arch/c6x/boot/dts/tms320c6474.dtsi
new file mode 100644
index 00000000000..cc601bf348a
--- /dev/null
+++ b/arch/c6x/boot/dts/tms320c6474.dtsi
@@ -0,0 +1,89 @@
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ cpus {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ device_type = "cpu";
+ reg = <0>;
+ model = "ti,c64x+";
+ };
+ cpu@1 {
+ device_type = "cpu";
+ reg = <1>;
+ model = "ti,c64x+";
+ };
+ cpu@2 {
+ device_type = "cpu";
+ reg = <2>;
+ model = "ti,c64x+";
+ };
+ };
+
+ soc {
+ compatible = "simple-bus";
+ model = "tms320c6474";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ core_pic: interrupt-controller {
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ compatible = "ti,c64x+core-pic";
+ };
+
+ megamod_pic: interrupt-controller@1800000 {
+ compatible = "ti,c64x+megamod-pic";
+ interrupt-controller;
+ #interrupt-cells = <1>;
+ reg = <0x1800000 0x1000>;
+ interrupt-parent = <&core_pic>;
+ };
+
+ cache-controller@1840000 {
+ compatible = "ti,c64x+cache";
+ reg = <0x01840000 0x8400>;
+ };
+
+ timer3: timer@2940000 {
+ compatible = "ti,c64x+timer64";
+ ti,core-mask = < 0x04 >;
+ reg = <0x2940000 0x40>;
+ };
+
+ timer4: timer@2950000 {
+ compatible = "ti,c64x+timer64";
+ ti,core-mask = < 0x02 >;
+ reg = <0x2950000 0x40>;
+ };
+
+ timer5: timer@2960000 {
+ compatible = "ti,c64x+timer64";
+ ti,core-mask = < 0x01 >;
+ reg = <0x2960000 0x40>;
+ };
+
+ device-state-controller@2880800 {
+ compatible = "ti,c64x+dscr";
+ reg = <0x02880800 0x400>;
+
+ ti,dscr-devstat = <0x004>;
+ ti,dscr-silicon-rev = <0x014 28 0xf>;
+ ti,dscr-mac-fuse-regs = <0x34 3 4 5 6
+ 0x38 0 0 1 2>;
+ };
+
+ clock-controller@29a0000 {
+ compatible = "ti,c6474-pll", "ti,c64x+pll";
+ reg = <0x029a0000 0x200>;
+ ti,c64x+pll-bypass-delay = <120>;
+ ti,c64x+pll-reset-delay = <30000>;
+ ti,c64x+pll-lock-delay = <60000>;
+ };
+ };
+};
diff --git a/arch/c6x/boot/linked_dtb.S b/arch/c6x/boot/linked_dtb.S
new file mode 100644
index 00000000000..57a4454eaec
--- /dev/null
+++ b/arch/c6x/boot/linked_dtb.S
@@ -0,0 +1,2 @@
+.section __fdt_blob,"a"
+.incbin "arch/c6x/boot/builtin.dtb"
diff --git a/arch/c6x/configs/dsk6455_defconfig b/arch/c6x/configs/dsk6455_defconfig
new file mode 100644
index 00000000000..4663487c67a
--- /dev/null
+++ b/arch/c6x/configs/dsk6455_defconfig
@@ -0,0 +1,44 @@
+CONFIG_SOC_TMS320C6455=y
+CONFIG_EXPERIMENTAL=y
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_SYSVIPC=y
+CONFIG_SPARSE_IRQ=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_USER_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_EXPERT=y
+# CONFIG_FUTEX is not set
+# CONFIG_SLUB_DEBUG is not set
+CONFIG_MODULES=y
+CONFIG_MODULE_FORCE_LOAD=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODULE_FORCE_UNLOAD=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE=""
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_COUNT=2
+CONFIG_BLK_DEV_RAM_SIZE=17000
+CONFIG_MISC_DEVICES=y
+# CONFIG_INPUT is not set
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_CRC16=y
+# CONFIG_ENABLE_MUST_CHECK is not set
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_BUGVERBOSE is not set
+CONFIG_MTD=y
+CONFIG_MTD_CFI=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_MTD_PHYSMAP_OF=y
diff --git a/arch/c6x/configs/evmc6457_defconfig b/arch/c6x/configs/evmc6457_defconfig
new file mode 100644
index 00000000000..bba40e195ec
--- /dev/null
+++ b/arch/c6x/configs/evmc6457_defconfig
@@ -0,0 +1,41 @@
+CONFIG_SOC_TMS320C6457=y
+CONFIG_EXPERIMENTAL=y
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_SYSVIPC=y
+CONFIG_SPARSE_IRQ=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_USER_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_EXPERT=y
+# CONFIG_FUTEX is not set
+# CONFIG_SLUB_DEBUG is not set
+CONFIG_MODULES=y
+CONFIG_MODULE_FORCE_LOAD=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODULE_FORCE_UNLOAD=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE=""
+CONFIG_BOARD_EVM6457=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_COUNT=2
+CONFIG_BLK_DEV_RAM_SIZE=17000
+CONFIG_MISC_DEVICES=y
+# CONFIG_INPUT is not set
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_CRC16=y
+# CONFIG_ENABLE_MUST_CHECK is not set
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_BUGVERBOSE is not set
diff --git a/arch/c6x/configs/evmc6472_defconfig b/arch/c6x/configs/evmc6472_defconfig
new file mode 100644
index 00000000000..8c46155f6d3
--- /dev/null
+++ b/arch/c6x/configs/evmc6472_defconfig
@@ -0,0 +1,42 @@
+CONFIG_SOC_TMS320C6472=y
+CONFIG_EXPERIMENTAL=y
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_SYSVIPC=y
+CONFIG_SPARSE_IRQ=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_USER_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_EXPERT=y
+# CONFIG_FUTEX is not set
+# CONFIG_SLUB_DEBUG is not set
+CONFIG_MODULES=y
+CONFIG_MODULE_FORCE_LOAD=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODULE_FORCE_UNLOAD=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_FORCE is not set
+CONFIG_BOARD_EVM6472=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_COUNT=2
+CONFIG_BLK_DEV_RAM_SIZE=17000
+CONFIG_MISC_DEVICES=y
+# CONFIG_INPUT is not set
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_CRC16=y
+# CONFIG_ENABLE_MUST_CHECK is not set
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_BUGVERBOSE is not set
diff --git a/arch/c6x/configs/evmc6474_defconfig b/arch/c6x/configs/evmc6474_defconfig
new file mode 100644
index 00000000000..15533f63231
--- /dev/null
+++ b/arch/c6x/configs/evmc6474_defconfig
@@ -0,0 +1,42 @@
+CONFIG_SOC_TMS320C6474=y
+CONFIG_EXPERIMENTAL=y
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_SYSVIPC=y
+CONFIG_SPARSE_IRQ=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_USER_NS is not set
+# CONFIG_PID_NS is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_EXPERT=y
+# CONFIG_FUTEX is not set
+# CONFIG_SLUB_DEBUG is not set
+CONFIG_MODULES=y
+CONFIG_MODULE_FORCE_LOAD=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODULE_FORCE_UNLOAD=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE=""
+# CONFIG_CMDLINE_FORCE is not set
+CONFIG_BOARD_EVM6474=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_COUNT=2
+CONFIG_BLK_DEV_RAM_SIZE=17000
+CONFIG_MISC_DEVICES=y
+# CONFIG_INPUT is not set
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_CRC16=y
+# CONFIG_ENABLE_MUST_CHECK is not set
+# CONFIG_SCHED_DEBUG is not set
+# CONFIG_DEBUG_BUGVERBOSE is not set
diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild
new file mode 100644
index 00000000000..13dcf78adf9
--- /dev/null
+++ b/arch/c6x/include/asm/Kbuild
@@ -0,0 +1,54 @@
+include include/asm-generic/Kbuild.asm
+
+generic-y += atomic.h
+generic-y += auxvec.h
+generic-y += bitsperlong.h
+generic-y += bug.h
+generic-y += bugs.h
+generic-y += cputime.h
+generic-y += current.h
+generic-y += device.h
+generic-y += div64.h
+generic-y += dma.h
+generic-y += emergency-restart.h
+generic-y += errno.h
+generic-y += fb.h
+generic-y += fcntl.h
+generic-y += futex.h
+generic-y += hw_irq.h
+generic-y += io.h
+generic-y += ioctl.h
+generic-y += ioctls.h
+generic-y += ipcbuf.h
+generic-y += irq_regs.h
+generic-y += kdebug.h
+generic-y += kmap_types.h
+generic-y += local.h
+generic-y += mman.h
+generic-y += mmu_context.h
+generic-y += msgbuf.h
+generic-y += param.h
+generic-y += pci.h
+generic-y += percpu.h
+generic-y += pgalloc.h
+generic-y += poll.h
+generic-y += posix_types.h
+generic-y += resource.h
+generic-y += scatterlist.h
+generic-y += segment.h
+generic-y += sembuf.h
+generic-y += shmbuf.h
+generic-y += shmparam.h
+generic-y += siginfo.h
+generic-y += socket.h
+generic-y += sockios.h
+generic-y += stat.h
+generic-y += statfs.h
+generic-y += termbits.h
+generic-y += termios.h
+generic-y += tlbflush.h
+generic-y += topology.h
+generic-y += types.h
+generic-y += ucontext.h
+generic-y += user.h
+generic-y += vga.h
diff --git a/arch/c6x/include/asm/asm-offsets.h b/arch/c6x/include/asm/asm-offsets.h
new file mode 100644
index 00000000000..d370ee36a18
--- /dev/null
+++ b/arch/c6x/include/asm/asm-offsets.h
@@ -0,0 +1 @@
+#include <generated/asm-offsets.h>
diff --git a/arch/c6x/include/asm/bitops.h b/arch/c6x/include/asm/bitops.h
new file mode 100644
index 00000000000..39ab7e874d9
--- /dev/null
+++ b/arch/c6x/include/asm/bitops.h
@@ -0,0 +1,105 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_BITOPS_H
+#define _ASM_C6X_BITOPS_H
+
+#ifdef __KERNEL__
+
+#include <linux/bitops.h>
+
+#include <asm/system.h>
+#include <asm/byteorder.h>
+
+/*
+ * clear_bit() doesn't provide any barrier for the compiler.
+ */
+#define smp_mb__before_clear_bit() barrier()
+#define smp_mb__after_clear_bit() barrier()
+
+/*
+ * We are lucky, DSP is perfect for bitops: do it in 3 cycles
+ */
+
+/**
+ * __ffs - find first bit in word.
+ * @word: The word to search
+ *
+ * Undefined if no bit exists, so code should check against 0 first.
+ * Note __ffs(0) = undef, __ffs(1) = 0, __ffs(0x80000000) = 31.
+ *
+ */
+static inline unsigned long __ffs(unsigned long x)
+{
+ asm (" bitr .M1 %0,%0\n"
+ " nop\n"
+ " lmbd .L1 1,%0,%0\n"
+ : "+a"(x));
+
+ return x;
+}
+
+/*
+ * ffz - find first zero in word.
+ * @word: The word to search
+ *
+ * Undefined if no zero exists, so code should check against ~0UL first.
+ */
+#define ffz(x) __ffs(~(x))
+
+/**
+ * fls - find last (most-significant) bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
+ */
+static inline int fls(int x)
+{
+ if (!x)
+ return 0;
+
+ asm (" lmbd .L1 1,%0,%0\n" : "+a"(x));
+
+ return 32 - x;
+}
+
+/**
+ * ffs - find first bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as
+ * the libc and compiler builtin ffs routines, therefore
+ * differs in spirit from the above ffz (man ffs).
+ * Note ffs(0) = 0, ffs(1) = 1, ffs(0x80000000) = 32.
+ */
+static inline int ffs(int x)
+{
+ if (!x)
+ return 0;
+
+ return __ffs(x) + 1;
+}
+
+#include <asm-generic/bitops/__fls.h>
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/find.h>
+
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
+
+#include <asm-generic/bitops/atomic.h>
+#include <asm-generic/bitops/non-atomic.h>
+#include <asm-generic/bitops/le.h>
+#include <asm-generic/bitops/ext2-atomic.h>
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_C6X_BITOPS_H */
diff --git a/arch/c6x/include/asm/byteorder.h b/arch/c6x/include/asm/byteorder.h
new file mode 100644
index 00000000000..166038db342
--- /dev/null
+++ b/arch/c6x/include/asm/byteorder.h
@@ -0,0 +1,12 @@
+#ifndef _ASM_C6X_BYTEORDER_H
+#define _ASM_C6X_BYTEORDER_H
+
+#include <asm/types.h>
+
+#ifdef _BIG_ENDIAN
+#include <linux/byteorder/big_endian.h>
+#else /* _BIG_ENDIAN */
+#include <linux/byteorder/little_endian.h>
+#endif /* _BIG_ENDIAN */
+
+#endif /* _ASM_BYTEORDER_H */
diff --git a/arch/c6x/include/asm/cache.h b/arch/c6x/include/asm/cache.h
new file mode 100644
index 00000000000..6d521d96d94
--- /dev/null
+++ b/arch/c6x/include/asm/cache.h
@@ -0,0 +1,90 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2005, 2006, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_CACHE_H
+#define _ASM_C6X_CACHE_H
+
+#include <linux/irqflags.h>
+
+/*
+ * Cache line size
+ */
+#define L1D_CACHE_BYTES 64
+#define L1P_CACHE_BYTES 32
+#define L2_CACHE_BYTES 128
+
+/*
+ * L2 used as cache
+ */
+#define L2MODE_SIZE L2MODE_256K_CACHE
+
+/*
+ * For practical reasons the L1_CACHE_BYTES defines should not be smaller than
+ * the L2 line size
+ */
+#define L1_CACHE_BYTES L2_CACHE_BYTES
+
+#define L2_CACHE_ALIGN_LOW(x) \
+ (((x) & ~(L2_CACHE_BYTES - 1)))
+#define L2_CACHE_ALIGN_UP(x) \
+ (((x) + (L2_CACHE_BYTES - 1)) & ~(L2_CACHE_BYTES - 1))
+#define L2_CACHE_ALIGN_CNT(x) \
+ (((x) + (sizeof(int) - 1)) & ~(sizeof(int) - 1))
+
+#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
+#define ARCH_SLAB_MINALIGN L1_CACHE_BYTES
+
+/*
+ * This is the granularity of hardware cacheability control.
+ */
+#define CACHEABILITY_ALIGN 0x01000000
+
+/*
+ * Align a physical address to MAR regions
+ */
+#define CACHE_REGION_START(v) \
+ (((u32) (v)) & ~(CACHEABILITY_ALIGN - 1))
+#define CACHE_REGION_END(v) \
+ (((u32) (v) + (CACHEABILITY_ALIGN - 1)) & ~(CACHEABILITY_ALIGN - 1))
+
+extern void __init c6x_cache_init(void);
+
+extern void enable_caching(unsigned long start, unsigned long end);
+extern void disable_caching(unsigned long start, unsigned long end);
+
+extern void L1_cache_off(void);
+extern void L1_cache_on(void);
+
+extern void L1P_cache_global_invalidate(void);
+extern void L1D_cache_global_invalidate(void);
+extern void L1D_cache_global_writeback(void);
+extern void L1D_cache_global_writeback_invalidate(void);
+extern void L2_cache_set_mode(unsigned int mode);
+extern void L2_cache_global_writeback_invalidate(void);
+extern void L2_cache_global_writeback(void);
+
+extern void L1P_cache_block_invalidate(unsigned int start, unsigned int end);
+extern void L1D_cache_block_invalidate(unsigned int start, unsigned int end);
+extern void L1D_cache_block_writeback_invalidate(unsigned int start,
+ unsigned int end);
+extern void L1D_cache_block_writeback(unsigned int start, unsigned int end);
+extern void L2_cache_block_invalidate(unsigned int start, unsigned int end);
+extern void L2_cache_block_writeback(unsigned int start, unsigned int end);
+extern void L2_cache_block_writeback_invalidate(unsigned int start,
+ unsigned int end);
+extern void L2_cache_block_invalidate_nowait(unsigned int start,
+ unsigned int end);
+extern void L2_cache_block_writeback_nowait(unsigned int start,
+ unsigned int end);
+
+extern void L2_cache_block_writeback_invalidate_nowait(unsigned int start,
+ unsigned int end);
+
+#endif /* _ASM_C6X_CACHE_H */
diff --git a/arch/c6x/include/asm/cacheflush.h b/arch/c6x/include/asm/cacheflush.h
new file mode 100644
index 00000000000..df5db90dbe5
--- /dev/null
+++ b/arch/c6x/include/asm/cacheflush.h
@@ -0,0 +1,65 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_CACHEFLUSH_H
+#define _ASM_C6X_CACHEFLUSH_H
+
+#include <linux/spinlock.h>
+
+#include <asm/setup.h>
+#include <asm/cache.h>
+#include <asm/mman.h>
+#include <asm/page.h>
+#include <asm/string.h>
+
+/*
+ * virtually-indexed cache management (our cache is physically indexed)
+ */
+#define flush_cache_all() do {} while (0)
+#define flush_cache_mm(mm) do {} while (0)
+#define flush_cache_dup_mm(mm) do {} while (0)
+#define flush_cache_range(mm, start, end) do {} while (0)
+#define flush_cache_page(vma, vmaddr, pfn) do {} while (0)
+#define flush_cache_vmap(start, end) do {} while (0)
+#define flush_cache_vunmap(start, end) do {} while (0)
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
+#define flush_dcache_page(page) do {} while (0)
+#define flush_dcache_mmap_lock(mapping) do {} while (0)
+#define flush_dcache_mmap_unlock(mapping) do {} while (0)
+
+/*
+ * physically-indexed cache management
+ */
+#define flush_icache_range(s, e) \
+do { \
+ L1D_cache_block_writeback((s), (e)); \
+ L1P_cache_block_invalidate((s), (e)); \
+} while (0)
+
+#define flush_icache_page(vma, page) \
+do { \
+ if ((vma)->vm_flags & PROT_EXEC) \
+ L1D_cache_block_writeback_invalidate(page_address(page), \
+ (unsigned long) page_address(page) + PAGE_SIZE)); \
+ L1P_cache_block_invalidate(page_address(page), \
+ (unsigned long) page_address(page) + PAGE_SIZE)); \
+} while (0)
+
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { \
+ memcpy(dst, src, len); \
+ flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
+} while (0)
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+ memcpy(dst, src, len)
+
+#endif /* _ASM_C6X_CACHEFLUSH_H */
diff --git a/arch/c6x/include/asm/checksum.h b/arch/c6x/include/asm/checksum.h
new file mode 100644
index 00000000000..7246816d6e4
--- /dev/null
+++ b/arch/c6x/include/asm/checksum.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_CHECKSUM_H
+#define _ASM_C6X_CHECKSUM_H
+
+static inline __wsum
+csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
+ unsigned short proto, __wsum sum)
+{
+ unsigned long long tmp;
+
+ asm ("add .d1 %1,%5,%1\n"
+ "|| addu .l1 %3,%4,%0\n"
+ "addu .l1 %2,%0,%0\n"
+#ifndef CONFIG_CPU_BIG_ENDIAN
+ "|| shl .s1 %1,8,%1\n"
+#endif
+ "addu .l1 %1,%0,%0\n"
+ "add .l1 %P0,%p0,%2\n"
+ : "=&a"(tmp), "+a"(len), "+a"(sum)
+ : "a" (saddr), "a" (daddr), "a" (proto));
+ return sum;
+}
+#define csum_tcpudp_nofold csum_tcpudp_nofold
+
+#include <asm-generic/checksum.h>
+
+#endif /* _ASM_C6X_CHECKSUM_H */
diff --git a/arch/c6x/include/asm/clkdev.h b/arch/c6x/include/asm/clkdev.h
new file mode 100644
index 00000000000..76a070b1c2e
--- /dev/null
+++ b/arch/c6x/include/asm/clkdev.h
@@ -0,0 +1,22 @@
+#ifndef _ASM_CLKDEV_H
+#define _ASM_CLKDEV_H
+
+#include <linux/slab.h>
+
+struct clk;
+
+static inline int __clk_get(struct clk *clk)
+{
+ return 1;
+}
+
+static inline void __clk_put(struct clk *clk)
+{
+}
+
+static inline struct clk_lookup_alloc *__clkdev_alloc(size_t size)
+{
+ return kzalloc(size, GFP_KERNEL);
+}
+
+#endif /* _ASM_CLKDEV_H */
diff --git a/arch/c6x/include/asm/clock.h b/arch/c6x/include/asm/clock.h
new file mode 100644
index 00000000000..bcf42b2b4b1
--- /dev/null
+++ b/arch/c6x/include/asm/clock.h
@@ -0,0 +1,148 @@
+/*
+ * TI C64X clock definitions
+ *
+ * Copyright (C) 2010, 2011 Texas Instruments.
+ * Contributed by: Mark Salter <msalter@redhat.com>
+ *
+ * Copied heavily from arm/mach-davinci/clock.h, so:
+ *
+ * Copyright (C) 2006-2007 Texas Instruments.
+ * Copyright (C) 2008-2009 Deep Root Systems, LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_C6X_CLOCK_H
+#define _ASM_C6X_CLOCK_H
+
+#ifndef __ASSEMBLER__
+
+#include <linux/list.h>
+
+/* PLL/Reset register offsets */
+#define PLLCTL 0x100
+#define PLLM 0x110
+#define PLLPRE 0x114
+#define PLLDIV1 0x118
+#define PLLDIV2 0x11c
+#define PLLDIV3 0x120
+#define PLLPOST 0x128
+#define PLLCMD 0x138
+#define PLLSTAT 0x13c
+#define PLLALNCTL 0x140
+#define PLLDCHANGE 0x144
+#define PLLCKEN 0x148
+#define PLLCKSTAT 0x14c
+#define PLLSYSTAT 0x150
+#define PLLDIV4 0x160
+#define PLLDIV5 0x164
+#define PLLDIV6 0x168
+#define PLLDIV7 0x16c
+#define PLLDIV8 0x170
+#define PLLDIV9 0x174
+#define PLLDIV10 0x178
+#define PLLDIV11 0x17c
+#define PLLDIV12 0x180
+#define PLLDIV13 0x184
+#define PLLDIV14 0x188
+#define PLLDIV15 0x18c
+#define PLLDIV16 0x190
+
+/* PLLM register bits */
+#define PLLM_PLLM_MASK 0xff
+#define PLLM_VAL(x) ((x) - 1)
+
+/* PREDIV register bits */
+#define PLLPREDIV_EN BIT(15)
+#define PLLPREDIV_VAL(x) ((x) - 1)
+
+/* PLLCTL register bits */
+#define PLLCTL_PLLEN BIT(0)
+#define PLLCTL_PLLPWRDN BIT(1)
+#define PLLCTL_PLLRST BIT(3)
+#define PLLCTL_PLLDIS BIT(4)
+#define PLLCTL_PLLENSRC BIT(5)
+#define PLLCTL_CLKMODE BIT(8)
+
+/* PLLCMD register bits */
+#define PLLCMD_GOSTAT BIT(0)
+
+/* PLLSTAT register bits */
+#define PLLSTAT_GOSTAT BIT(0)
+
+/* PLLDIV register bits */
+#define PLLDIV_EN BIT(15)
+#define PLLDIV_RATIO_MASK 0x1f
+#define PLLDIV_RATIO(x) ((x) - 1)
+
+struct pll_data;
+
+struct clk {
+ struct list_head node;
+ struct module *owner;
+ const char *name;
+ unsigned long rate;
+ int usecount;
+ u32 flags;
+ struct clk *parent;
+ struct list_head children; /* list of children */
+ struct list_head childnode; /* parent's child list node */
+ struct pll_data *pll_data;
+ u32 div;
+ unsigned long (*recalc) (struct clk *);
+ int (*set_rate) (struct clk *clk, unsigned long rate);
+ int (*round_rate) (struct clk *clk, unsigned long rate);
+};
+
+/* Clock flags: SoC-specific flags start at BIT(16) */
+#define ALWAYS_ENABLED BIT(1)
+#define CLK_PLL BIT(2) /* PLL-derived clock */
+#define PRE_PLL BIT(3) /* source is before PLL mult/div */
+#define FIXED_DIV_PLL BIT(4) /* fixed divisor from PLL */
+#define FIXED_RATE_PLL BIT(5) /* fixed ouput rate PLL */
+
+#define MAX_PLL_SYSCLKS 16
+
+struct pll_data {
+ void __iomem *base;
+ u32 num;
+ u32 flags;
+ u32 input_rate;
+ u32 bypass_delay; /* in loops */
+ u32 reset_delay; /* in loops */
+ u32 lock_delay; /* in loops */
+ struct clk sysclks[MAX_PLL_SYSCLKS + 1];
+};
+
+/* pll_data flag bit */
+#define PLL_HAS_PRE BIT(0)
+#define PLL_HAS_MUL BIT(1)
+#define PLL_HAS_POST BIT(2)
+
+#define CLK(dev, con, ck) \
+ { \
+ .dev_id = dev, \
+ .con_id = con, \
+ .clk = ck, \
+ } \
+
+extern void c6x_clks_init(struct clk_lookup *clocks);
+extern int clk_register(struct clk *clk);
+extern void clk_unregister(struct clk *clk);
+extern void c64x_setup_clocks(void);
+
+extern struct pll_data c6x_soc_pll1;
+
+extern struct clk clkin1;
+extern struct clk c6x_core_clk;
+extern struct clk c6x_i2c_clk;
+extern struct clk c6x_watchdog_clk;
+extern struct clk c6x_mcbsp1_clk;
+extern struct clk c6x_mcbsp2_clk;
+extern struct clk c6x_mdio_clk;
+
+#endif
+
+#endif /* _ASM_C6X_CLOCK_H */
diff --git a/arch/c6x/include/asm/delay.h b/arch/c6x/include/asm/delay.h
new file mode 100644
index 00000000000..f314c2e9eb5
--- /dev/null
+++ b/arch/c6x/include/asm/delay.h
@@ -0,0 +1,67 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_DELAY_H
+#define _ASM_C6X_DELAY_H
+
+#include <linux/kernel.h>
+
+extern unsigned int ticks_per_ns_scaled;
+
+static inline void __delay(unsigned long loops)
+{
+ uint32_t tmp;
+
+ /* 6 cycles per loop */
+ asm volatile (" mv .s1 %0,%1\n"
+ "0: [%1] b .s1 0b\n"
+ " add .l1 -6,%0,%0\n"
+ " cmplt .l1 1,%0,%1\n"
+ " nop 3\n"
+ : "+a"(loops), "=A"(tmp));
+}
+
+static inline void _c6x_tickdelay(unsigned int x)
+{
+ uint32_t cnt, endcnt;
+
+ asm volatile (" mvc .s2 TSCL,%0\n"
+ " add .s2x %0,%1,%2\n"
+ " || mvk .l2 1,B0\n"
+ "0: [B0] b .s2 0b\n"
+ " mvc .s2 TSCL,%0\n"
+ " sub .s2 %0,%2,%0\n"
+ " cmpgt .l2 0,%0,B0\n"
+ " nop 2\n"
+ : "=b"(cnt), "+a"(x), "=b"(endcnt) : : "B0");
+}
+
+/* use scaled math to avoid slow division */
+#define C6X_NDELAY_SCALE 10
+
+static inline void _ndelay(unsigned int n)
+{
+ _c6x_tickdelay((ticks_per_ns_scaled * n) >> C6X_NDELAY_SCALE);
+}
+
+static inline void _udelay(unsigned int n)
+{
+ while (n >= 10) {
+ _ndelay(10000);
+ n -= 10;
+ }
+ while (n-- > 0)
+ _ndelay(1000);
+}
+
+#define udelay(x) _udelay((unsigned int)(x))
+#define ndelay(x) _ndelay((unsigned int)(x))
+
+#endif /* _ASM_C6X_DELAY_H */
diff --git a/arch/c6x/include/asm/dma-mapping.h b/arch/c6x/include/asm/dma-mapping.h
new file mode 100644
index 00000000000..03579fd99db
--- /dev/null
+++ b/arch/c6x/include/asm/dma-mapping.h
@@ -0,0 +1,91 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef _ASM_C6X_DMA_MAPPING_H
+#define _ASM_C6X_DMA_MAPPING_H
+
+#include <linux/dma-debug.h>
+#include <asm-generic/dma-coherent.h>
+
+#define dma_supported(d, m) 1
+
+static inline int dma_set_mask(struct device *dev, u64 dma_mask)
+{
+ if (!dev->dma_mask || !dma_supported(dev, dma_mask))
+ return -EIO;
+
+ *dev->dma_mask = dma_mask;
+
+ return 0;
+}
+
+/*
+ * DMA errors are defined by all-bits-set in the DMA address.
+ */
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
+{
+ return dma_addr == ~0;
+}
+
+extern dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
+ size_t size, enum dma_data_direction dir);
+
+extern void dma_unmap_single(struct device *dev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir);
+
+extern int dma_map_sg(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction direction);
+
+extern void dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction direction);
+
+static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir)
+{
+ dma_addr_t handle;
+
+ handle = dma_map_single(dev, page_address(page) + offset, size, dir);
+
+ debug_dma_map_page(dev, page, offset, size, dir, handle, false);
+
+ return handle;
+}
+
+static inline void dma_unmap_page(struct device *dev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir)
+{
+ dma_unmap_single(dev, handle, size, dir);
+
+ debug_dma_unmap_page(dev, handle, size, dir, false);
+}
+
+extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir);
+
+extern void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
+ size_t size,
+ enum dma_data_direction dir);
+
+extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir);
+
+extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir);
+
+extern void coherent_mem_init(u32 start, u32 size);
+extern void *dma_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
+extern void dma_free_coherent(struct device *, size_t, void *, dma_addr_t);
+
+#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent((d), (s), (h), (f))
+#define dma_free_noncoherent(d, s, v, h) dma_free_coherent((d), (s), (v), (h))
+
+#endif /* _ASM_C6X_DMA_MAPPING_H */
diff --git a/arch/c6x/include/asm/dscr.h b/arch/c6x/include/asm/dscr.h
new file mode 100644
index 00000000000..561ba833204
--- /dev/null
+++ b/arch/c6x/include/asm/dscr.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef _ASM_C6X_DSCR_H
+#define _ASM_C6X_DSCR_H
+
+enum dscr_devstate_t {
+ DSCR_DEVSTATE_ENABLED,
+ DSCR_DEVSTATE_DISABLED,
+};
+
+/*
+ * Set the device state of the device with the given ID.
+ *
+ * Individual drivers should use this to enable or disable the
+ * hardware device. The devid used to identify the device being
+ * controlled should be a property in the device's tree node.
+ */
+extern void dscr_set_devstate(int devid, enum dscr_devstate_t state);
+
+/*
+ * Assert or de-assert an RMII reset.
+ */
+extern void dscr_rmii_reset(int id, int assert);
+
+extern void dscr_probe(void);
+
+#endif /* _ASM_C6X_DSCR_H */
diff --git a/arch/c6x/include/asm/elf.h b/arch/c6x/include/asm/elf.h
new file mode 100644
index 00000000000..d57865ba2c4
--- /dev/null
+++ b/arch/c6x/include/asm/elf.h
@@ -0,0 +1,113 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_ELF_H
+#define _ASM_C6X_ELF_H
+
+/*
+ * ELF register definitions..
+ */
+#include <asm/ptrace.h>
+
+typedef unsigned long elf_greg_t;
+typedef unsigned long elf_fpreg_t;
+
+#define ELF_NGREG 58
+#define ELF_NFPREG 1
+
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x) ((x)->e_machine == EM_TI_C6000)
+
+#define elf_check_const_displacement(x) (1)
+
+/*
+ * These are used to set parameters in the core dumps.
+ */
+#ifdef __LITTLE_ENDIAN__
+#define ELF_DATA ELFDATA2LSB
+#else
+#define ELF_DATA ELFDATA2MSB
+#endif
+
+#define ELF_CLASS ELFCLASS32
+#define ELF_ARCH EM_TI_C6000
+
+/* Nothing for now. Need to setup DP... */
+#define ELF_PLAT_INIT(_r)
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE 4096
+
+#define ELF_CORE_COPY_REGS(_dest, _regs) \
+ memcpy((char *) &_dest, (char *) _regs, \
+ sizeof(struct pt_regs));
+
+/* This yields a mask that user programs can use to figure out what
+ instruction set this cpu supports. */
+
+#define ELF_HWCAP (0)
+
+/* This yields a string that ld.so will use to load implementation
+ specific libraries for optimization. This is more specific in
+ intent than poking at uname or /proc/cpuinfo. */
+
+#define ELF_PLATFORM (NULL)
+
+#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
+
+/* C6X specific section types */
+#define SHT_C6000_UNWIND 0x70000001
+#define SHT_C6000_PREEMPTMAP 0x70000002
+#define SHT_C6000_ATTRIBUTES 0x70000003
+
+/* C6X specific DT_ tags */
+#define DT_C6000_DSBT_BASE 0x70000000
+#define DT_C6000_DSBT_SIZE 0x70000001
+#define DT_C6000_PREEMPTMAP 0x70000002
+#define DT_C6000_DSBT_INDEX 0x70000003
+
+/* C6X specific relocs */
+#define R_C6000_NONE 0
+#define R_C6000_ABS32 1
+#define R_C6000_ABS16 2
+#define R_C6000_ABS8 3
+#define R_C6000_PCR_S21 4
+#define R_C6000_PCR_S12 5
+#define R_C6000_PCR_S10 6
+#define R_C6000_PCR_S7 7
+#define R_C6000_ABS_S16 8
+#define R_C6000_ABS_L16 9
+#define R_C6000_ABS_H16 10
+#define R_C6000_SBR_U15_B 11
+#define R_C6000_SBR_U15_H 12
+#define R_C6000_SBR_U15_W 13
+#define R_C6000_SBR_S16 14
+#define R_C6000_SBR_L16_B 15
+#define R_C6000_SBR_L16_H 16
+#define R_C6000_SBR_L16_W 17
+#define R_C6000_SBR_H16_B 18
+#define R_C6000_SBR_H16_H 19
+#define R_C6000_SBR_H16_W 20
+#define R_C6000_SBR_GOT_U15_W 21
+#define R_C6000_SBR_GOT_L16_W 22
+#define R_C6000_SBR_GOT_H16_W 23
+#define R_C6000_DSBT_INDEX 24
+#define R_C6000_PREL31 25
+#define R_C6000_COPY 26
+#define R_C6000_ALIGN 253
+#define R_C6000_FPHEAD 254
+#define R_C6000_NOCMP 255
+
+#endif /*_ASM_C6X_ELF_H */
diff --git a/arch/c6x/include/asm/ftrace.h b/arch/c6x/include/asm/ftrace.h
new file mode 100644
index 00000000000..3701958d3d1
--- /dev/null
+++ b/arch/c6x/include/asm/ftrace.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_C6X_FTRACE_H
+#define _ASM_C6X_FTRACE_H
+
+/* empty */
+
+#endif /* _ASM_C6X_FTRACE_H */
diff --git a/arch/c6x/include/asm/hardirq.h b/arch/c6x/include/asm/hardirq.h
new file mode 100644
index 00000000000..9621954f98f
--- /dev/null
+++ b/arch/c6x/include/asm/hardirq.h
@@ -0,0 +1,20 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_C6X_HARDIRQ_H
+#define _ASM_C6X_HARDIRQ_H
+
+extern void ack_bad_irq(int irq);
+#define ack_bad_irq ack_bad_irq
+
+#include <asm-generic/hardirq.h>
+
+#endif /* _ASM_C6X_HARDIRQ_H */
diff --git a/arch/c6x/include/asm/irq.h b/arch/c6x/include/asm/irq.h
new file mode 100644
index 00000000000..a6ae3c9d9c4
--- /dev/null
+++ b/arch/c6x/include/asm/irq.h
@@ -0,0 +1,302 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * Large parts taken directly from powerpc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_IRQ_H
+#define _ASM_C6X_IRQ_H
+
+#include <linux/threads.h>
+#include <linux/list.h>
+#include <linux/radix-tree.h>
+#include <asm/percpu.h>
+
+#define irq_canonicalize(irq) (irq)
+
+/*
+ * The C64X+ core has 16 IRQ vectors. One each is used by Reset and NMI. Two
+ * are reserved. The remaining 12 vectors are used to route SoC interrupts.
+ * These interrupt vectors are prioritized with IRQ 4 having the highest
+ * priority and IRQ 15 having the lowest.
+ *
+ * The C64x+ megamodule provides a PIC which combines SoC IRQ sources into a
+ * single core IRQ vector. There are four combined sources, each of which
+ * feed into one of the 12 general interrupt vectors. The remaining 8 vectors
+ * can each route a single SoC interrupt directly.
+ */
+#define NR_PRIORITY_IRQS 16
+
+#define NR_IRQS_LEGACY NR_PRIORITY_IRQS
+
+/* Total number of virq in the platform */
+#define NR_IRQS 256
+
+/* This number is used when no interrupt has been assigned */
+#define NO_IRQ 0
+
+/* This type is the placeholder for a hardware interrupt number. It has to
+ * be big enough to enclose whatever representation is used by a given
+ * platform.
+ */
+typedef unsigned long irq_hw_number_t;
+
+/* Interrupt controller "host" data structure. This could be defined as a
+ * irq domain controller. That is, it handles the mapping between hardware
+ * and virtual interrupt numbers for a given interrupt domain. The host
+ * structure is generally created by the PIC code for a given PIC instance
+ * (though a host can cover more than one PIC if they have a flat number
+ * model). It's the host callbacks that are responsible for setting the
+ * irq_chip on a given irq_desc after it's been mapped.
+ *
+ * The host code and data structures are fairly agnostic to the fact that
+ * we use an open firmware device-tree. We do have references to struct
+ * device_node in two places: in irq_find_host() to find the host matching
+ * a given interrupt controller node, and of course as an argument to its
+ * counterpart host->ops->match() callback. However, those are treated as
+ * generic pointers by the core and the fact that it's actually a device-node
+ * pointer is purely a convention between callers and implementation. This
+ * code could thus be used on other architectures by replacing those two
+ * by some sort of arch-specific void * "token" used to identify interrupt
+ * controllers.
+ */
+struct irq_host;
+struct radix_tree_root;
+struct device_node;
+
+/* Functions below are provided by the host and called whenever a new mapping
+ * is created or an old mapping is disposed. The host can then proceed to
+ * whatever internal data structures management is required. It also needs
+ * to setup the irq_desc when returning from map().
+ */
+struct irq_host_ops {
+ /* Match an interrupt controller device node to a host, returns
+ * 1 on a match
+ */
+ int (*match)(struct irq_host *h, struct device_node *node);
+
+ /* Create or update a mapping between a virtual irq number and a hw
+ * irq number. This is called only once for a given mapping.
+ */
+ int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
+
+ /* Dispose of such a mapping */
+ void (*unmap)(struct irq_host *h, unsigned int virq);
+
+ /* Translate device-tree interrupt specifier from raw format coming
+ * from the firmware to a irq_hw_number_t (interrupt line number) and
+ * type (sense) that can be passed to set_irq_type(). In the absence
+ * of this callback, irq_create_of_mapping() and irq_of_parse_and_map()
+ * will return the hw number in the first cell and IRQ_TYPE_NONE for
+ * the type (which amount to keeping whatever default value the
+ * interrupt controller has for that line)
+ */
+ int (*xlate)(struct irq_host *h, struct device_node *ctrler,
+ const u32 *intspec, unsigned int intsize,
+ irq_hw_number_t *out_hwirq, unsigned int *out_type);
+};
+
+struct irq_host {
+ struct list_head link;
+
+ /* type of reverse mapping technique */
+ unsigned int revmap_type;
+#define IRQ_HOST_MAP_PRIORITY 0 /* core priority irqs, get irqs 1..15 */
+#define IRQ_HOST_MAP_NOMAP 1 /* no fast reverse mapping */
+#define IRQ_HOST_MAP_LINEAR 2 /* linear map of interrupts */
+#define IRQ_HOST_MAP_TREE 3 /* radix tree */
+ union {
+ struct {
+ unsigned int size;
+ unsigned int *revmap;
+ } linear;
+ struct radix_tree_root tree;
+ } revmap_data;
+ struct irq_host_ops *ops;
+ void *host_data;
+ irq_hw_number_t inval_irq;
+
+ /* Optional device node pointer */
+ struct device_node *of_node;
+};
+
+struct irq_data;
+extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
+extern irq_hw_number_t virq_to_hw(unsigned int virq);
+extern bool virq_is_host(unsigned int virq, struct irq_host *host);
+
+/**
+ * irq_alloc_host - Allocate a new irq_host data structure
+ * @of_node: optional device-tree node of the interrupt controller
+ * @revmap_type: type of reverse mapping to use
+ * @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map
+ * @ops: map/unmap host callbacks
+ * @inval_irq: provide a hw number in that host space that is always invalid
+ *
+ * Allocates and initialize and irq_host structure. Note that in the case of
+ * IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns
+ * for all legacy interrupts except 0 (which is always the invalid irq for
+ * a legacy controller). For a IRQ_HOST_MAP_LINEAR, the map is allocated by
+ * this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated
+ * later during boot automatically (the reverse mapping will use the slow path
+ * until that happens).
+ */
+extern struct irq_host *irq_alloc_host(struct device_node *of_node,
+ unsigned int revmap_type,
+ unsigned int revmap_arg,
+ struct irq_host_ops *ops,
+ irq_hw_number_t inval_irq);
+
+
+/**
+ * irq_find_host - Locates a host for a given device node
+ * @node: device-tree node of the interrupt controller
+ */
+extern struct irq_host *irq_find_host(struct device_node *node);
+
+
+/**
+ * irq_set_default_host - Set a "default" host
+ * @host: default host pointer
+ *
+ * For convenience, it's possible to set a "default" host that will be used
+ * whenever NULL is passed to irq_create_mapping(). It makes life easier for
+ * platforms that want to manipulate a few hard coded interrupt numbers that
+ * aren't properly represented in the device-tree.
+ */
+extern void irq_set_default_host(struct irq_host *host);
+
+
+/**
+ * irq_set_virq_count - Set the maximum number of virt irqs
+ * @count: number of linux virtual irqs, capped with NR_IRQS
+ *
+ * This is mainly for use by platforms like iSeries who want to program
+ * the virtual irq number in the controller to avoid the reverse mapping
+ */
+extern void irq_set_virq_count(unsigned int count);
+
+
+/**
+ * irq_create_mapping - Map a hardware interrupt into linux virq space
+ * @host: host owning this hardware interrupt or NULL for default host
+ * @hwirq: hardware irq number in that host space
+ *
+ * Only one mapping per hardware interrupt is permitted. Returns a linux
+ * virq number.
+ * If the sense/trigger is to be specified, set_irq_type() should be called
+ * on the number returned from that call.
+ */
+extern unsigned int irq_create_mapping(struct irq_host *host,
+ irq_hw_number_t hwirq);
+
+
+/**
+ * irq_dispose_mapping - Unmap an interrupt
+ * @virq: linux virq number of the interrupt to unmap
+ */
+extern void irq_dispose_mapping(unsigned int virq);
+
+/**
+ * irq_find_mapping - Find a linux virq from an hw irq number.
+ * @host: host owning this hardware interrupt
+ * @hwirq: hardware irq number in that host space
+ *
+ * This is a slow path, for use by generic code. It's expected that an
+ * irq controller implementation directly calls the appropriate low level
+ * mapping function.
+ */
+extern unsigned int irq_find_mapping(struct irq_host *host,
+ irq_hw_number_t hwirq);
+
+/**
+ * irq_create_direct_mapping - Allocate a virq for direct mapping
+ * @host: host to allocate the virq for or NULL for default host
+ *
+ * This routine is used for irq controllers which can choose the hardware
+ * interrupt numbers they generate. In such a case it's simplest to use
+ * the linux virq as the hardware interrupt number.
+ */
+extern unsigned int irq_create_direct_mapping(struct irq_host *host);
+
+/**
+ * irq_radix_revmap_insert - Insert a hw irq to linux virq number mapping.
+ * @host: host owning this hardware interrupt
+ * @virq: linux irq number
+ * @hwirq: hardware irq number in that host space
+ *
+ * This is for use by irq controllers that use a radix tree reverse
+ * mapping for fast lookup.
+ */
+extern void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq,
+ irq_hw_number_t hwirq);
+
+/**
+ * irq_radix_revmap_lookup - Find a linux virq from a hw irq number.
+ * @host: host owning this hardware interrupt
+ * @hwirq: hardware irq number in that host space
+ *
+ * This is a fast path, for use by irq controller code that uses radix tree
+ * revmaps
+ */
+extern unsigned int irq_radix_revmap_lookup(struct irq_host *host,
+ irq_hw_number_t hwirq);
+
+/**
+ * irq_linear_revmap - Find a linux virq from a hw irq number.
+ * @host: host owning this hardware interrupt
+ * @hwirq: hardware irq number in that host space
+ *
+ * This is a fast path, for use by irq controller code that uses linear
+ * revmaps. It does fallback to the slow path if the revmap doesn't exist
+ * yet and will create the revmap entry with appropriate locking
+ */
+
+extern unsigned int irq_linear_revmap(struct irq_host *host,
+ irq_hw_number_t hwirq);
+
+
+
+/**
+ * irq_alloc_virt - Allocate virtual irq numbers
+ * @host: host owning these new virtual irqs
+ * @count: number of consecutive numbers to allocate
+ * @hint: pass a hint number, the allocator will try to use a 1:1 mapping
+ *
+ * This is a low level function that is used internally by irq_create_mapping()
+ * and that can be used by some irq controllers implementations for things
+ * like allocating ranges of numbers for MSIs. The revmaps are left untouched.
+ */
+extern unsigned int irq_alloc_virt(struct irq_host *host,
+ unsigned int count,
+ unsigned int hint);
+
+/**
+ * irq_free_virt - Free virtual irq numbers
+ * @virq: virtual irq number of the first interrupt to free
+ * @count: number of interrupts to free
+ *
+ * This function is the opposite of irq_alloc_virt. It will not clear reverse
+ * maps, this should be done previously by unmap'ing the interrupt. In fact,
+ * all interrupts covered by the range being freed should have been unmapped
+ * prior to calling this.
+ */
+extern void irq_free_virt(unsigned int virq, unsigned int count);
+
+extern void __init init_pic_c64xplus(void);
+
+extern void init_IRQ(void);
+
+struct pt_regs;
+
+extern asmlinkage void c6x_do_IRQ(unsigned int prio, struct pt_regs *regs);
+
+extern unsigned long irq_err_count;
+
+#endif /* _ASM_C6X_IRQ_H */
diff --git a/arch/c6x/include/asm/irqflags.h b/arch/c6x/include/asm/irqflags.h
new file mode 100644
index 00000000000..cf78e09e18c
--- /dev/null
+++ b/arch/c6x/include/asm/irqflags.h
@@ -0,0 +1,72 @@
+/*
+ * C6X IRQ flag handling
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated
+ * Written by Mark Salter (msalter@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#ifndef _ASM_IRQFLAGS_H
+#define _ASM_IRQFLAGS_H
+
+#ifndef __ASSEMBLY__
+
+/* read interrupt enabled status */
+static inline unsigned long arch_local_save_flags(void)
+{
+ unsigned long flags;
+
+ asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags));
+ return flags;
+}
+
+/* set interrupt enabled status */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags));
+}
+
+/* unconditionally enable interrupts */
+static inline void arch_local_irq_enable(void)
+{
+ unsigned long flags = arch_local_save_flags();
+ flags |= 1;
+ arch_local_irq_restore(flags);
+}
+
+/* unconditionally disable interrupts */
+static inline void arch_local_irq_disable(void)
+{
+ unsigned long flags = arch_local_save_flags();
+ flags &= ~1;
+ arch_local_irq_restore(flags);
+}
+
+/* get status and disable interrupts */
+static inline unsigned long arch_local_irq_save(void)
+{
+ unsigned long flags;
+
+ flags = arch_local_save_flags();
+ arch_local_irq_restore(flags & ~1);
+ return flags;
+}
+
+/* test flags */
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+ return (flags & 1) == 0;
+}
+
+/* test hardware interrupt enable bit */
+static inline int arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_IRQFLAGS_H */
diff --git a/arch/c6x/include/asm/linkage.h b/arch/c6x/include/asm/linkage.h
new file mode 100644
index 00000000000..376925c47d5
--- /dev/null
+++ b/arch/c6x/include/asm/linkage.h
@@ -0,0 +1,30 @@
+#ifndef _ASM_C6X_LINKAGE_H
+#define _ASM_C6X_LINKAGE_H
+
+#ifdef __ASSEMBLER__
+
+#define __ALIGN .align 2
+#define __ALIGN_STR ".align 2"
+
+#ifndef __DSBT__
+#define ENTRY(name) \
+ .global name @ \
+ __ALIGN @ \
+name:
+#else
+#define ENTRY(name) \
+ .global name @ \
+ .hidden name @ \
+ __ALIGN @ \
+name:
+#endif
+
+#define ENDPROC(name) \
+ .type name, @function @ \
+ .size name, . - name
+
+#endif
+
+#include <asm-generic/linkage.h>
+
+#endif /* _ASM_C6X_LINKAGE_H */
diff --git a/arch/c6x/include/asm/megamod-pic.h b/arch/c6x/include/asm/megamod-pic.h
new file mode 100644
index 00000000000..eca0a867803
--- /dev/null
+++ b/arch/c6x/include/asm/megamod-pic.h
@@ -0,0 +1,9 @@
+#ifndef _C6X_MEGAMOD_PIC_H
+#define _C6X_MEGAMOD_PIC_H
+
+#ifdef __KERNEL__
+
+extern void __init megamod_pic_init(void);
+
+#endif /* __KERNEL__ */
+#endif /* _C6X_MEGAMOD_PIC_H */
diff --git a/arch/c6x/include/asm/mmu.h b/arch/c6x/include/asm/mmu.h
new file mode 100644
index 00000000000..41592bf1606
--- /dev/null
+++ b/arch/c6x/include/asm/mmu.h
@@ -0,0 +1,18 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_MMU_H
+#define _ASM_C6X_MMU_H
+
+typedef struct {
+ unsigned long end_brk;
+} mm_context_t;
+
+#endif /* _ASM_C6X_MMU_H */
diff --git a/arch/c6x/include/asm/module.h b/arch/c6x/include/asm/module.h
new file mode 100644
index 00000000000..a453f9744f4
--- /dev/null
+++ b/arch/c6x/include/asm/module.h
@@ -0,0 +1,33 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * Updated for 2.6.34 by: Mark Salter (msalter@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_MODULE_H
+#define _ASM_C6X_MODULE_H
+
+#define Elf_Shdr Elf32_Shdr
+#define Elf_Sym Elf32_Sym
+#define Elf_Ehdr Elf32_Ehdr
+#define Elf_Addr Elf32_Addr
+#define Elf_Word Elf32_Word
+
+/*
+ * This file contains the C6x architecture specific module code.
+ */
+struct mod_arch_specific {
+};
+
+struct loaded_sections {
+ unsigned int new_vaddr;
+ unsigned int loaded;
+};
+
+#endif /* _ASM_C6X_MODULE_H */
diff --git a/arch/c6x/include/asm/mutex.h b/arch/c6x/include/asm/mutex.h
new file mode 100644
index 00000000000..7a7248e0462
--- /dev/null
+++ b/arch/c6x/include/asm/mutex.h
@@ -0,0 +1,6 @@
+#ifndef _ASM_C6X_MUTEX_H
+#define _ASM_C6X_MUTEX_H
+
+#include <asm-generic/mutex-null.h>
+
+#endif /* _ASM_C6X_MUTEX_H */
diff --git a/arch/c6x/include/asm/page.h b/arch/c6x/include/asm/page.h
new file mode 100644
index 00000000000..d18e2b0c7ae
--- /dev/null
+++ b/arch/c6x/include/asm/page.h
@@ -0,0 +1,11 @@
+#ifndef _ASM_C6X_PAGE_H
+#define _ASM_C6X_PAGE_H
+
+#define VM_DATA_DEFAULT_FLAGS \
+ (VM_READ | VM_WRITE | \
+ ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
+ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/page.h>
+
+#endif /* _ASM_C6X_PAGE_H */
diff --git a/arch/c6x/include/asm/pgtable.h b/arch/c6x/include/asm/pgtable.h
new file mode 100644
index 00000000000..68c8af4f1f9
--- /dev/null
+++ b/arch/c6x/include/asm/pgtable.h
@@ -0,0 +1,81 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_PGTABLE_H
+#define _ASM_C6X_PGTABLE_H
+
+#include <asm-generic/4level-fixup.h>
+
+#include <asm/setup.h>
+#include <asm/page.h>
+
+/*
+ * All 32bit addresses are effectively valid for vmalloc...
+ * Sort of meaningless for non-VM targets.
+ */
+#define VMALLOC_START 0
+#define VMALLOC_END 0xffffffff
+
+#define pgd_present(pgd) (1)
+#define pgd_none(pgd) (0)
+#define pgd_bad(pgd) (0)
+#define pgd_clear(pgdp)
+#define kern_addr_valid(addr) (1)
+
+#define pmd_offset(a, b) ((void *)0)
+#define pmd_none(x) (!pmd_val(x))
+#define pmd_present(x) (pmd_val(x))
+#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
+#define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK)
+
+#define PAGE_NONE __pgprot(0) /* these mean nothing to NO_MM */
+#define PAGE_SHARED __pgprot(0) /* these mean nothing to NO_MM */
+#define PAGE_COPY __pgprot(0) /* these mean nothing to NO_MM */
+#define PAGE_READONLY __pgprot(0) /* these mean nothing to NO_MM */
+#define PAGE_KERNEL __pgprot(0) /* these mean nothing to NO_MM */
+#define pgprot_noncached(prot) (prot)
+
+extern void paging_init(void);
+
+#define __swp_type(x) (0)
+#define __swp_offset(x) (0)
+#define __swp_entry(typ, off) ((swp_entry_t) { ((typ) | ((off) << 7)) })
+#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
+#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+
+static inline int pte_file(pte_t pte)
+{
+ return 0;
+}
+
+#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
+#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
+
+/*
+ * ZERO_PAGE is a global shared page that is always zero: used
+ * for zero-mapped memory areas etc..
+ */
+#define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page)
+extern unsigned long empty_zero_page;
+
+#define swapper_pg_dir ((pgd_t *) 0)
+
+/*
+ * No page table caches to initialise
+ */
+#define pgtable_cache_init() do { } while (0)
+#define io_remap_pfn_range remap_pfn_range
+
+#define io_remap_page_range(vma, vaddr, paddr, size, prot) \
+ remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
+
+#include <asm-generic/pgtable.h>
+
+#endif /* _ASM_C6X_PGTABLE_H */
diff --git a/arch/c6x/include/asm/processor.h b/arch/c6x/include/asm/processor.h
new file mode 100644
index 00000000000..8154c4ee8c9
--- /dev/null
+++ b/arch/c6x/include/asm/processor.h
@@ -0,0 +1,132 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * Updated for 2.6.34: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_PROCESSOR_H
+#define _ASM_C6X_PROCESSOR_H
+
+#include <asm/ptrace.h>
+#include <asm/page.h>
+#include <asm/current.h>
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() \
+({ \
+ void *__pc; \
+ asm("mvc .S2 pce1,%0\n" : "=b"(__pc)); \
+ __pc; \
+})
+
+/*
+ * User space process size. This is mostly meaningless for NOMMU
+ * but some C6X processors may have RAM addresses up to 0xFFFFFFFF.
+ * Since calls like mmap() can return an address or an error, we
+ * have to allow room for error returns when code does something
+ * like:
+ *
+ * addr = do_mmap(...)
+ * if ((unsigned long)addr >= TASK_SIZE)
+ * ... its an error code, not an address ...
+ *
+ * Here, we allow for 4096 error codes which means we really can't
+ * use the last 4K page on systems with RAM extending all the way
+ * to the end of the 32-bit address space.
+ */
+#define TASK_SIZE 0xFFFFF000
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's. We won't be using it
+ */
+#define TASK_UNMAPPED_BASE 0
+
+struct thread_struct {
+ unsigned long long b15_14;
+ unsigned long long a15_14;
+ unsigned long long b13_12;
+ unsigned long long a13_12;
+ unsigned long long b11_10;
+ unsigned long long a11_10;
+ unsigned long long ricl_icl;
+ unsigned long usp; /* user stack pointer */
+ unsigned long pc; /* kernel pc */
+ unsigned long wchan;
+};
+
+#define INIT_THREAD \
+{ \
+ .usp = 0, \
+ .wchan = 0, \
+}
+
+#define INIT_MMAP { \
+ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, \
+ NULL, NULL }
+
+#define task_pt_regs(task) \
+ ((struct pt_regs *)(THREAD_START_SP + task_stack_page(task)) - 1)
+
+#define alloc_kernel_stack() __get_free_page(GFP_KERNEL)
+#define free_kernel_stack(page) free_page((page))
+
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+
+extern void start_thread(struct pt_regs *regs, unsigned int pc,
+ unsigned long usp);
+
+/* Free all resources held by a thread. */
+static inline void release_thread(struct task_struct *dead_task)
+{
+}
+
+/* Prepare to copy thread state - unlazy all lazy status */
+#define prepare_to_copy(tsk) do { } while (0)
+
+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+
+#define copy_segments(tsk, mm) do { } while (0)
+#define release_segments(mm) do { } while (0)
+
+/*
+ * saved PC of a blocked thread.
+ */
+#define thread_saved_pc(tsk) (task_pt_regs(tsk)->pc)
+
+/*
+ * saved kernel SP and DP of a blocked thread.
+ */
+#ifdef _BIG_ENDIAN
+#define thread_saved_ksp(tsk) \
+ (*(unsigned long *)&(tsk)->thread.b15_14)
+#define thread_saved_dp(tsk) \
+ (*(((unsigned long *)&(tsk)->thread.b15_14) + 1))
+#else
+#define thread_saved_ksp(tsk) \
+ (*(((unsigned long *)&(tsk)->thread.b15_14) + 1))
+#define thread_saved_dp(tsk) \
+ (*(unsigned long *)&(tsk)->thread.b15_14)
+#endif
+
+extern unsigned long get_wchan(struct task_struct *p);
+
+#define KSTK_EIP(tsk) (task_pt_regs(task)->pc)
+#define KSTK_ESP(tsk) (task_pt_regs(task)->sp)
+
+#define cpu_relax() do { } while (0)
+
+extern const struct seq_operations cpuinfo_op;
+
+#endif /* ASM_C6X_PROCESSOR_H */
diff --git a/arch/c6x/include/asm/procinfo.h b/arch/c6x/include/asm/procinfo.h
new file mode 100644
index 00000000000..c139d1e71f8
--- /dev/null
+++ b/arch/c6x/include/asm/procinfo.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2010 Texas Instruments Incorporated
+ * Author: Mark Salter (msalter@redhat.com)
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_PROCINFO_H
+#define _ASM_C6X_PROCINFO_H
+
+#ifdef __KERNEL__
+
+struct proc_info_list {
+ unsigned int cpu_val;
+ unsigned int cpu_mask;
+ const char *arch_name;
+ const char *elf_name;
+ unsigned int elf_hwcap;
+};
+
+#else /* __KERNEL__ */
+#include <asm/elf.h>
+#warning "Please include asm/elf.h instead"
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_C6X_PROCINFO_H */
diff --git a/arch/c6x/include/asm/prom.h b/arch/c6x/include/asm/prom.h
new file mode 100644
index 00000000000..b4ec95f0751
--- /dev/null
+++ b/arch/c6x/include/asm/prom.h
@@ -0,0 +1 @@
+/* dummy prom.h; here to make linux/of.h's #includes happy */
diff --git a/arch/c6x/include/asm/ptrace.h b/arch/c6x/include/asm/ptrace.h
new file mode 100644
index 00000000000..21e8d7931fe
--- /dev/null
+++ b/arch/c6x/include/asm/ptrace.h
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2004, 2006, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * Updated for 2.6.34: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_PTRACE_H
+#define _ASM_C6X_PTRACE_H
+
+#define BKPT_OPCODE 0x56454314 /* illegal opcode */
+
+#ifdef _BIG_ENDIAN
+#define PT_LO(odd, even) odd
+#define PT_HI(odd, even) even
+#else
+#define PT_LO(odd, even) even
+#define PT_HI(odd, even) odd
+#endif
+
+#define PT_A4_ORG PT_LO(1, 0)
+#define PT_TSR PT_HI(1, 0)
+#define PT_ILC PT_LO(3, 2)
+#define PT_RILC PT_HI(3, 2)
+#define PT_CSR PT_LO(5, 4)
+#define PT_PC PT_HI(5, 4)
+#define PT_B16 PT_LO(7, 6)
+#define PT_B17 PT_HI(7, 6)
+#define PT_B18 PT_LO(9, 8)
+#define PT_B19 PT_HI(9, 8)
+#define PT_B20 PT_LO(11, 10)
+#define PT_B21 PT_HI(11, 10)
+#define PT_B22 PT_LO(13, 12)
+#define PT_B23 PT_HI(13, 12)
+#define PT_B24 PT_LO(15, 14)
+#define PT_B25 PT_HI(15, 14)
+#define PT_B26 PT_LO(17, 16)
+#define PT_B27 PT_HI(17, 16)
+#define PT_B28 PT_LO(19, 18)
+#define PT_B29 PT_HI(19, 18)
+#define PT_B30 PT_LO(21, 20)
+#define PT_B31 PT_HI(21, 20)
+#define PT_B0 PT_LO(23, 22)
+#define PT_B1 PT_HI(23, 22)
+#define PT_B2 PT_LO(25, 24)
+#define PT_B3 PT_HI(25, 24)
+#define PT_B4 PT_LO(27, 26)
+#define PT_B5 PT_HI(27, 26)
+#define PT_B6 PT_LO(29, 28)
+#define PT_B7 PT_HI(29, 28)
+#define PT_B8 PT_LO(31, 30)
+#define PT_B9 PT_HI(31, 30)
+#define PT_B10 PT_LO(33, 32)
+#define PT_B11 PT_HI(33, 32)
+#define PT_B12 PT_LO(35, 34)
+#define PT_B13 PT_HI(35, 34)
+#define PT_A16 PT_LO(37, 36)
+#define PT_A17 PT_HI(37, 36)
+#define PT_A18 PT_LO(39, 38)
+#define PT_A19 PT_HI(39, 38)
+#define PT_A20 PT_LO(41, 40)
+#define PT_A21 PT_HI(41, 40)
+#define PT_A22 PT_LO(43, 42)
+#define PT_A23 PT_HI(43, 42)
+#define PT_A24 PT_LO(45, 44)
+#define PT_A25 PT_HI(45, 44)
+#define PT_A26 PT_LO(47, 46)
+#define PT_A27 PT_HI(47, 46)
+#define PT_A28 PT_LO(49, 48)
+#define PT_A29 PT_HI(49, 48)
+#define PT_A30 PT_LO(51, 50)
+#define PT_A31 PT_HI(51, 50)
+#define PT_A0 PT_LO(53, 52)
+#define PT_A1 PT_HI(53, 52)
+#define PT_A2 PT_LO(55, 54)
+#define PT_A3 PT_HI(55, 54)
+#define PT_A4 PT_LO(57, 56)
+#define PT_A5 PT_HI(57, 56)
+#define PT_A6 PT_LO(59, 58)
+#define PT_A7 PT_HI(59, 58)
+#define PT_A8 PT_LO(61, 60)
+#define PT_A9 PT_HI(61, 60)
+#define PT_A10 PT_LO(63, 62)
+#define PT_A11 PT_HI(63, 62)
+#define PT_A12 PT_LO(65, 64)
+#define PT_A13 PT_HI(65, 64)
+#define PT_A14 PT_LO(67, 66)
+#define PT_A15 PT_HI(67, 66)
+#define PT_B14 PT_LO(69, 68)
+#define PT_B15 PT_HI(69, 68)
+
+#define NR_PTREGS 70
+
+#define PT_DP PT_B14 /* Data Segment Pointer (B14) */
+#define PT_SP PT_B15 /* Stack Pointer (B15) */
+
+#ifndef __ASSEMBLY__
+
+#ifdef _BIG_ENDIAN
+#define REG_PAIR(odd, even) unsigned long odd; unsigned long even
+#else
+#define REG_PAIR(odd, even) unsigned long even; unsigned long odd
+#endif
+
+/*
+ * this struct defines the way the registers are stored on the
+ * stack during a system call. fields defined with REG_PAIR
+ * are saved and restored using double-word memory operations
+ * which means the word ordering of the pair depends on endianess.
+ */
+struct pt_regs {
+ REG_PAIR(tsr, orig_a4);
+ REG_PAIR(rilc, ilc);
+ REG_PAIR(pc, csr);
+
+ REG_PAIR(b17, b16);
+ REG_PAIR(b19, b18);
+ REG_PAIR(b21, b20);
+ REG_PAIR(b23, b22);
+ REG_PAIR(b25, b24);
+ REG_PAIR(b27, b26);
+ REG_PAIR(b29, b28);
+ REG_PAIR(b31, b30);
+
+ REG_PAIR(b1, b0);
+ REG_PAIR(b3, b2);
+ REG_PAIR(b5, b4);
+ REG_PAIR(b7, b6);
+ REG_PAIR(b9, b8);
+ REG_PAIR(b11, b10);
+ REG_PAIR(b13, b12);
+
+ REG_PAIR(a17, a16);
+ REG_PAIR(a19, a18);
+ REG_PAIR(a21, a20);
+ REG_PAIR(a23, a22);
+ REG_PAIR(a25, a24);
+ REG_PAIR(a27, a26);
+ REG_PAIR(a29, a28);
+ REG_PAIR(a31, a30);
+
+ REG_PAIR(a1, a0);
+ REG_PAIR(a3, a2);
+ REG_PAIR(a5, a4);
+ REG_PAIR(a7, a6);
+ REG_PAIR(a9, a8);
+ REG_PAIR(a11, a10);
+ REG_PAIR(a13, a12);
+
+ REG_PAIR(a15, a14);
+ REG_PAIR(sp, dp);
+};
+
+#ifdef __KERNEL__
+
+#include <linux/linkage.h>
+
+#define user_mode(regs) ((((regs)->tsr) & 0x40) != 0)
+
+#define instruction_pointer(regs) ((regs)->pc)
+#define profile_pc(regs) instruction_pointer(regs)
+#define user_stack_pointer(regs) ((regs)->sp)
+
+extern void show_regs(struct pt_regs *);
+
+extern asmlinkage unsigned long syscall_trace_entry(struct pt_regs *regs);
+extern asmlinkage void syscall_trace_exit(struct pt_regs *regs);
+
+#endif /* __KERNEL__ */
+#endif /* __ASSEMBLY__ */
+#endif /* _ASM_C6X_PTRACE_H */
diff --git a/arch/c6x/include/asm/sections.h b/arch/c6x/include/asm/sections.h
new file mode 100644
index 00000000000..f703989d837
--- /dev/null
+++ b/arch/c6x/include/asm/sections.h
@@ -0,0 +1,12 @@
+#ifndef _ASM_C6X_SECTIONS_H
+#define _ASM_C6X_SECTIONS_H
+
+#include <asm-generic/sections.h>
+
+extern char _vectors_start[];
+extern char _vectors_end[];
+
+extern char _data_lma[];
+extern char _fdt_start[], _fdt_end[];
+
+#endif /* _ASM_C6X_SECTIONS_H */
diff --git a/arch/c6x/include/asm/setup.h b/arch/c6x/include/asm/setup.h
new file mode 100644
index 00000000000..1808f279f82
--- /dev/null
+++ b/arch/c6x/include/asm/setup.h
@@ -0,0 +1,32 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_SETUP_H
+#define _ASM_C6X_SETUP_H
+
+#define COMMAND_LINE_SIZE 1024
+
+#ifndef __ASSEMBLY__
+extern char c6x_command_line[COMMAND_LINE_SIZE];
+
+extern int c6x_add_memory(phys_addr_t start, unsigned long size);
+
+extern unsigned long ram_start;
+extern unsigned long ram_end;
+
+extern int c6x_num_cores;
+extern unsigned int c6x_silicon_rev;
+extern unsigned int c6x_devstat;
+extern unsigned char c6x_fuse_mac[6];
+
+extern void machine_init(unsigned long dt_ptr);
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _ASM_C6X_SETUP_H */
diff --git a/arch/c6x/include/asm/sigcontext.h b/arch/c6x/include/asm/sigcontext.h
new file mode 100644
index 00000000000..eb702f39cde
--- /dev/null
+++ b/arch/c6x/include/asm/sigcontext.h
@@ -0,0 +1,80 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_SIGCONTEXT_H
+#define _ASM_C6X_SIGCONTEXT_H
+
+
+struct sigcontext {
+ unsigned long sc_mask; /* old sigmask */
+ unsigned long sc_sp; /* old user stack pointer */
+
+ unsigned long sc_a4;
+ unsigned long sc_b4;
+ unsigned long sc_a6;
+ unsigned long sc_b6;
+ unsigned long sc_a8;
+ unsigned long sc_b8;
+
+ unsigned long sc_a0;
+ unsigned long sc_a1;
+ unsigned long sc_a2;
+ unsigned long sc_a3;
+ unsigned long sc_a5;
+ unsigned long sc_a7;
+ unsigned long sc_a9;
+
+ unsigned long sc_b0;
+ unsigned long sc_b1;
+ unsigned long sc_b2;
+ unsigned long sc_b3;
+ unsigned long sc_b5;
+ unsigned long sc_b7;
+ unsigned long sc_b9;
+
+ unsigned long sc_a16;
+ unsigned long sc_a17;
+ unsigned long sc_a18;
+ unsigned long sc_a19;
+ unsigned long sc_a20;
+ unsigned long sc_a21;
+ unsigned long sc_a22;
+ unsigned long sc_a23;
+ unsigned long sc_a24;
+ unsigned long sc_a25;
+ unsigned long sc_a26;
+ unsigned long sc_a27;
+ unsigned long sc_a28;
+ unsigned long sc_a29;
+ unsigned long sc_a30;
+ unsigned long sc_a31;
+
+ unsigned long sc_b16;
+ unsigned long sc_b17;
+ unsigned long sc_b18;
+ unsigned long sc_b19;
+ unsigned long sc_b20;
+ unsigned long sc_b21;
+ unsigned long sc_b22;
+ unsigned long sc_b23;
+ unsigned long sc_b24;
+ unsigned long sc_b25;
+ unsigned long sc_b26;
+ unsigned long sc_b27;
+ unsigned long sc_b28;
+ unsigned long sc_b29;
+ unsigned long sc_b30;
+ unsigned long sc_b31;
+
+ unsigned long sc_csr;
+ unsigned long sc_pc;
+};
+
+#endif /* _ASM_C6X_SIGCONTEXT_H */
diff --git a/arch/c6x/include/asm/signal.h b/arch/c6x/include/asm/signal.h
new file mode 100644
index 00000000000..f1cd870596a
--- /dev/null
+++ b/arch/c6x/include/asm/signal.h
@@ -0,0 +1,17 @@
+#ifndef _ASM_C6X_SIGNAL_H
+#define _ASM_C6X_SIGNAL_H
+
+#include <asm-generic/signal.h>
+
+#ifndef __ASSEMBLY__
+#include <linux/linkage.h>
+
+struct pt_regs;
+
+extern asmlinkage int do_rt_sigreturn(struct pt_regs *regs);
+extern asmlinkage void do_notify_resume(struct pt_regs *regs,
+ u32 thread_info_flags,
+ int syscall);
+#endif
+
+#endif /* _ASM_C6X_SIGNAL_H */
diff --git a/arch/c6x/include/asm/soc.h b/arch/c6x/include/asm/soc.h
new file mode 100644
index 00000000000..43f50159e59
--- /dev/null
+++ b/arch/c6x/include/asm/soc.h
@@ -0,0 +1,35 @@
+/*
+ * Miscellaneous SoC-specific hooks.
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ *
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+#ifndef _ASM_C6X_SOC_H
+#define _ASM_C6X_SOC_H
+
+struct soc_ops {
+ /* Return active exception event or -1 if none */
+ int (*get_exception)(void);
+
+ /* Assert an event */
+ void (*assert_event)(unsigned int evt);
+};
+
+extern struct soc_ops soc_ops;
+
+extern int soc_get_exception(void);
+extern void soc_assert_event(unsigned int event);
+extern int soc_mac_addr(unsigned int index, u8 *addr);
+
+/*
+ * for mmio on SoC devices. regs are always same byte order as cpu.
+ */
+#define soc_readl(addr) __raw_readl(addr)
+#define soc_writel(b, addr) __raw_writel((b), (addr))
+
+#endif /* _ASM_C6X_SOC_H */
diff --git a/arch/c6x/include/asm/string.h b/arch/c6x/include/asm/string.h
new file mode 100644
index 00000000000..b21517c80a1
--- /dev/null
+++ b/arch/c6x/include/asm/string.h
@@ -0,0 +1,21 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_STRING_H
+#define _ASM_C6X_STRING_H
+
+#include <asm/page.h>
+#include <linux/linkage.h>
+
+asmlinkage extern void *memcpy(void *to, const void *from, size_t n);
+
+#define __HAVE_ARCH_MEMCPY
+
+#endif /* _ASM_C6X_STRING_H */
diff --git a/arch/c6x/include/asm/swab.h b/arch/c6x/include/asm/swab.h
new file mode 100644
index 00000000000..fd4bb0520e5
--- /dev/null
+++ b/arch/c6x/include/asm/swab.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_SWAB_H
+#define _ASM_C6X_SWAB_H
+
+static inline __attribute_const__ __u16 __c6x_swab16(__u16 val)
+{
+ asm("swap4 .l1 %0,%0\n" : "+a"(val));
+ return val;
+}
+
+static inline __attribute_const__ __u32 __c6x_swab32(__u32 val)
+{
+ asm("swap4 .l1 %0,%0\n"
+ "swap2 .l1 %0,%0\n"
+ : "+a"(val));
+ return val;
+}
+
+static inline __attribute_const__ __u64 __c6x_swab64(__u64 val)
+{
+ asm(" swap2 .s1 %p0,%P0\n"
+ "|| swap2 .l1 %P0,%p0\n"
+ " swap4 .l1 %p0,%p0\n"
+ " swap4 .l1 %P0,%P0\n"
+ : "+a"(val));
+ return val;
+}
+
+static inline __attribute_const__ __u32 __c6x_swahw32(__u32 val)
+{
+ asm("swap2 .l1 %0,%0\n" : "+a"(val));
+ return val;
+}
+
+static inline __attribute_const__ __u32 __c6x_swahb32(__u32 val)
+{
+ asm("swap4 .l1 %0,%0\n" : "+a"(val));
+ return val;
+}
+
+#define __arch_swab16 __c6x_swab16
+#define __arch_swab32 __c6x_swab32
+#define __arch_swab64 __c6x_swab64
+#define __arch_swahw32 __c6x_swahw32
+#define __arch_swahb32 __c6x_swahb32
+
+#endif /* _ASM_C6X_SWAB_H */
diff --git a/arch/c6x/include/asm/syscall.h b/arch/c6x/include/asm/syscall.h
new file mode 100644
index 00000000000..ae2be315ee9
--- /dev/null
+++ b/arch/c6x/include/asm/syscall.h
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __ASM_C6X_SYSCALL_H
+#define __ASM_C6X_SYSCALL_H
+
+#include <linux/err.h>
+#include <linux/sched.h>
+
+static inline int syscall_get_nr(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return regs->b0;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ /* do nothing */
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return IS_ERR_VALUE(regs->a4) ? regs->a4 : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return regs->a4;
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+ struct pt_regs *regs,
+ int error, long val)
+{
+ regs->a4 = error ?: val;
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+ struct pt_regs *regs, unsigned int i,
+ unsigned int n, unsigned long *args)
+{
+ switch (i) {
+ case 0:
+ if (!n--)
+ break;
+ *args++ = regs->a4;
+ case 1:
+ if (!n--)
+ break;
+ *args++ = regs->b4;
+ case 2:
+ if (!n--)
+ break;
+ *args++ = regs->a6;
+ case 3:
+ if (!n--)
+ break;
+ *args++ = regs->b6;
+ case 4:
+ if (!n--)
+ break;
+ *args++ = regs->a8;
+ case 5:
+ if (!n--)
+ break;
+ *args++ = regs->b8;
+ case 6:
+ if (!n--)
+ break;
+ default:
+ BUG();
+ }
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned int i, unsigned int n,
+ const unsigned long *args)
+{
+ switch (i) {
+ case 0:
+ if (!n--)
+ break;
+ regs->a4 = *args++;
+ case 1:
+ if (!n--)
+ break;
+ regs->b4 = *args++;
+ case 2:
+ if (!n--)
+ break;
+ regs->a6 = *args++;
+ case 3:
+ if (!n--)
+ break;
+ regs->b6 = *args++;
+ case 4:
+ if (!n--)
+ break;
+ regs->a8 = *args++;
+ case 5:
+ if (!n--)
+ break;
+ regs->a9 = *args++;
+ case 6:
+ if (!n)
+ break;
+ default:
+ BUG();
+ }
+}
+
+#endif /* __ASM_C6X_SYSCALLS_H */
diff --git a/arch/c6x/include/asm/syscalls.h b/arch/c6x/include/asm/syscalls.h
new file mode 100644
index 00000000000..aed53da703c
--- /dev/null
+++ b/arch/c6x/include/asm/syscalls.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __ASM_C6X_SYSCALLS_H
+#define __ASM_C6X_SYSCALLS_H
+
+#include <linux/compiler.h>
+#include <linux/linkage.h>
+#include <linux/types.h>
+
+/* The array of function pointers for syscalls. */
+extern void *sys_call_table[];
+
+/* The following are trampolines in entry.S to handle 64-bit arguments */
+extern long sys_pread_c6x(unsigned int fd, char __user *buf,
+ size_t count, off_t pos_low, off_t pos_high);
+extern long sys_pwrite_c6x(unsigned int fd, const char __user *buf,
+ size_t count, off_t pos_low, off_t pos_high);
+extern long sys_truncate64_c6x(const char __user *path,
+ off_t length_low, off_t length_high);
+extern long sys_ftruncate64_c6x(unsigned int fd,
+ off_t length_low, off_t length_high);
+extern long sys_fadvise64_c6x(int fd, u32 offset_lo, u32 offset_hi,
+ u32 len, int advice);
+extern long sys_fadvise64_64_c6x(int fd, u32 offset_lo, u32 offset_hi,
+ u32 len_lo, u32 len_hi, int advice);
+extern long sys_fallocate_c6x(int fd, int mode,
+ u32 offset_lo, u32 offset_hi,
+ u32 len_lo, u32 len_hi);
+extern int sys_cache_sync(unsigned long s, unsigned long e);
+
+struct pt_regs;
+
+extern asmlinkage long sys_c6x_clone(struct pt_regs *regs);
+extern asmlinkage long sys_c6x_execve(const char __user *name,
+ const char __user *const __user *argv,
+ const char __user *const __user *envp,
+ struct pt_regs *regs);
+
+
+#include <asm-generic/syscalls.h>
+
+#endif /* __ASM_C6X_SYSCALLS_H */
diff --git a/arch/c6x/include/asm/system.h b/arch/c6x/include/asm/system.h
new file mode 100644
index 00000000000..e076dc0eacc
--- /dev/null
+++ b/arch/c6x/include/asm/system.h
@@ -0,0 +1,168 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_SYSTEM_H
+#define _ASM_C6X_SYSTEM_H
+
+#include <linux/linkage.h>
+#include <linux/irqflags.h>
+
+#define prepare_to_switch() do { } while (0)
+
+struct task_struct;
+struct thread_struct;
+asmlinkage void *__switch_to(struct thread_struct *prev,
+ struct thread_struct *next,
+ struct task_struct *tsk);
+
+#define switch_to(prev, next, last) \
+ do { \
+ current->thread.wchan = (u_long) __builtin_return_address(0); \
+ (last) = __switch_to(&(prev)->thread, \
+ &(next)->thread, (prev)); \
+ mb(); \
+ current->thread.wchan = 0; \
+ } while (0)
+
+/* Reset the board */
+#define HARD_RESET_NOW()
+
+#define get_creg(reg) \
+ ({ unsigned int __x; \
+ asm volatile ("mvc .s2 " #reg ",%0\n" : "=b"(__x)); __x; })
+
+#define set_creg(reg, v) \
+ do { unsigned int __x = (unsigned int)(v); \
+ asm volatile ("mvc .s2 %0," #reg "\n" : : "b"(__x)); \
+ } while (0)
+
+#define or_creg(reg, n) \
+ do { unsigned __x, __n = (unsigned)(n); \
+ asm volatile ("mvc .s2 " #reg ",%0\n" \
+ "or .l2 %1,%0,%0\n" \
+ "mvc .s2 %0," #reg "\n" \
+ "nop\n" \
+ : "=&b"(__x) : "b"(__n)); \
+ } while (0)
+
+#define and_creg(reg, n) \
+ do { unsigned __x, __n = (unsigned)(n); \
+ asm volatile ("mvc .s2 " #reg ",%0\n" \
+ "and .l2 %1,%0,%0\n" \
+ "mvc .s2 %0," #reg "\n" \
+ "nop\n" \
+ : "=&b"(__x) : "b"(__n)); \
+ } while (0)
+
+#define get_coreid() (get_creg(DNUM) & 0xff)
+
+/* Set/get IST */
+#define set_ist(x) set_creg(ISTP, x)
+#define get_ist() get_creg(ISTP)
+
+/*
+ * Exception management
+ */
+asmlinkage void enable_exception(void);
+#define disable_exception()
+#define get_except_type() get_creg(EFR)
+#define ack_exception(type) set_creg(ECR, 1 << (type))
+#define get_iexcept() get_creg(IERR)
+#define set_iexcept(mask) set_creg(IERR, (mask))
+
+/*
+ * Misc. functions
+ */
+#define nop() asm("NOP\n");
+#define mb() barrier()
+#define rmb() barrier()
+#define wmb() barrier()
+#define set_mb(var, value) do { var = value; mb(); } while (0)
+#define set_wmb(var, value) do { var = value; wmb(); } while (0)
+
+#define smp_mb() barrier()
+#define smp_rmb() barrier()
+#define smp_wmb() barrier()
+#define smp_read_barrier_depends() do { } while (0)
+
+#define xchg(ptr, x) \
+ ((__typeof__(*(ptr)))__xchg((unsigned int)(x), (void *) (ptr), \
+ sizeof(*(ptr))))
+#define tas(ptr) xchg((ptr), 1)
+
+unsigned int _lmbd(unsigned int, unsigned int);
+unsigned int _bitr(unsigned int);
+
+struct __xchg_dummy { unsigned int a[100]; };
+#define __xg(x) ((volatile struct __xchg_dummy *)(x))
+
+static inline unsigned int __xchg(unsigned int x, volatile void *ptr, int size)
+{
+ unsigned int tmp;
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ switch (size) {
+ case 1:
+ tmp = 0;
+ tmp = *((unsigned char *) ptr);
+ *((unsigned char *) ptr) = (unsigned char) x;
+ break;
+ case 2:
+ tmp = 0;
+ tmp = *((unsigned short *) ptr);
+ *((unsigned short *) ptr) = x;
+ break;
+ case 4:
+ tmp = 0;
+ tmp = *((unsigned int *) ptr);
+ *((unsigned int *) ptr) = x;
+ break;
+ }
+ local_irq_restore(flags);
+ return tmp;
+}
+
+#include <asm-generic/cmpxchg-local.h>
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n) \
+ ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), \
+ (unsigned long)(o), \
+ (unsigned long)(n), \
+ sizeof(*(ptr))))
+#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+
+#include <asm-generic/cmpxchg.h>
+
+#define _extu(x, s, e) \
+ ({ unsigned int __x; \
+ asm volatile ("extu .S2 %3,%1,%2,%0\n" : \
+ "=b"(__x) : "n"(s), "n"(e), "b"(x)); \
+ __x; })
+
+
+extern unsigned int c6x_core_freq;
+
+struct pt_regs;
+
+extern void die(char *str, struct pt_regs *fp, int nr);
+extern asmlinkage int process_exception(struct pt_regs *regs);
+extern void time_init(void);
+extern void free_initmem(void);
+
+extern void (*c6x_restart)(void);
+extern void (*c6x_halt)(void);
+
+#endif /* _ASM_C6X_SYSTEM_H */
diff --git a/arch/c6x/include/asm/thread_info.h b/arch/c6x/include/asm/thread_info.h
new file mode 100644
index 00000000000..fd99148cda9
--- /dev/null
+++ b/arch/c6x/include/asm/thread_info.h
@@ -0,0 +1,121 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * Updated for 2.6.3x: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_THREAD_INFO_H
+#define _ASM_C6X_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#include <asm/page.h>
+
+#ifdef CONFIG_4KSTACKS
+#define THREAD_SIZE 4096
+#define THREAD_SHIFT 12
+#define THREAD_ORDER 0
+#else
+#define THREAD_SIZE 8192
+#define THREAD_SHIFT 13
+#define THREAD_ORDER 1
+#endif
+
+#define THREAD_START_SP (THREAD_SIZE - 8)
+
+#ifndef __ASSEMBLY__
+
+typedef struct {
+ unsigned long seg;
+} mm_segment_t;
+
+/*
+ * low level task data.
+ */
+struct thread_info {
+ struct task_struct *task; /* main task structure */
+ struct exec_domain *exec_domain; /* execution domain */
+ unsigned long flags; /* low level flags */
+ int cpu; /* cpu we're on */
+ int preempt_count; /* 0 = preemptable, <0 = BUG */
+ mm_segment_t addr_limit; /* thread address space */
+ struct restart_block restart_block;
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
+ */
+#define INIT_THREAD_INFO(tsk) \
+{ \
+ .task = &tsk, \
+ .exec_domain = &default_exec_domain, \
+ .flags = 0, \
+ .cpu = 0, \
+ .preempt_count = INIT_PREEMPT_COUNT, \
+ .addr_limit = KERNEL_DS, \
+ .restart_block = { \
+ .fn = do_no_restart_syscall, \
+ }, \
+}
+
+#define init_thread_info (init_thread_union.thread_info)
+#define init_stack (init_thread_union.stack)
+
+/* get the thread information struct of current task */
+static inline __attribute__((const))
+struct thread_info *current_thread_info(void)
+{
+ struct thread_info *ti;
+ asm volatile (" clr .s2 B15,0,%1,%0\n"
+ : "=b" (ti)
+ : "Iu5" (THREAD_SHIFT - 1));
+ return ti;
+}
+
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
+
+/* thread information allocation */
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO)
+#else
+#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK)
+#endif
+
+#define alloc_thread_info_node(tsk, node) \
+ ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
+
+#define free_thread_info(ti) free_pages((unsigned long) (ti), THREAD_ORDER)
+#define get_thread_info(ti) get_task_struct((ti)->task)
+#define put_thread_info(ti) put_task_struct((ti)->task)
+#endif /* __ASSEMBLY__ */
+
+#define PREEMPT_ACTIVE 0x10000000
+
+/*
+ * thread information flag bit numbers
+ * - pending work-to-be-done flags are in LSW
+ * - other flags in MSW
+ */
+#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
+#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
+#define TIF_SIGPENDING 2 /* signal pending */
+#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
+#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */
+
+#define TIF_POLLING_NRFLAG 16 /* true if polling TIF_NEED_RESCHED */
+#define TIF_MEMDIE 17 /* OOM killer killed process */
+
+#define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */
+#define TIF_ALLWORK_MASK 0x00007FFF /* work on any return to u-space */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_C6X_THREAD_INFO_H */
diff --git a/arch/c6x/include/asm/timer64.h b/arch/c6x/include/asm/timer64.h
new file mode 100644
index 00000000000..bbe27bb9887
--- /dev/null
+++ b/arch/c6x/include/asm/timer64.h
@@ -0,0 +1,6 @@
+#ifndef _C6X_TIMER64_H
+#define _C6X_TIMER64_H
+
+extern void __init timer64_init(void);
+
+#endif /* _C6X_TIMER64_H */
diff --git a/arch/c6x/include/asm/timex.h b/arch/c6x/include/asm/timex.h
new file mode 100644
index 00000000000..508c3ec971f
--- /dev/null
+++ b/arch/c6x/include/asm/timex.h
@@ -0,0 +1,33 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * Modified for 2.6.34: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_TIMEX_H
+#define _ASM_C6X_TIMEX_H
+
+#define CLOCK_TICK_RATE ((1000 * 1000000UL) / 6)
+
+/* 64-bit timestamp */
+typedef unsigned long long cycles_t;
+
+static inline cycles_t get_cycles(void)
+{
+ unsigned l, h;
+
+ asm volatile (" dint\n"
+ " mvc .s2 TSCL,%0\n"
+ " mvc .s2 TSCH,%1\n"
+ " rint\n"
+ : "=b"(l), "=b"(h));
+ return ((cycles_t)h << 32) | l;
+}
+
+#endif /* _ASM_C6X_TIMEX_H */
diff --git a/arch/c6x/include/asm/tlb.h b/arch/c6x/include/asm/tlb.h
new file mode 100644
index 00000000000..8709e5e29d2
--- /dev/null
+++ b/arch/c6x/include/asm/tlb.h
@@ -0,0 +1,8 @@
+#ifndef _ASM_C6X_TLB_H
+#define _ASM_C6X_TLB_H
+
+#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
+
+#include <asm-generic/tlb.h>
+
+#endif /* _ASM_C6X_TLB_H */
diff --git a/arch/c6x/include/asm/traps.h b/arch/c6x/include/asm/traps.h
new file mode 100644
index 00000000000..62124d7b1b5
--- /dev/null
+++ b/arch/c6x/include/asm/traps.h
@@ -0,0 +1,36 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_TRAPS_H
+#define _ASM_C6X_TRAPS_H
+
+#define EXCEPT_TYPE_NXF 31 /* NMI */
+#define EXCEPT_TYPE_EXC 30 /* external exception */
+#define EXCEPT_TYPE_IXF 1 /* internal exception */
+#define EXCEPT_TYPE_SXF 0 /* software exception */
+
+#define EXCEPT_CAUSE_LBX (1 << 7) /* loop buffer exception */
+#define EXCEPT_CAUSE_PRX (1 << 6) /* privilege exception */
+#define EXCEPT_CAUSE_RAX (1 << 5) /* resource access exception */
+#define EXCEPT_CAUSE_RCX (1 << 4) /* resource conflict exception */
+#define EXCEPT_CAUSE_OPX (1 << 3) /* opcode exception */
+#define EXCEPT_CAUSE_EPX (1 << 2) /* execute packet exception */
+#define EXCEPT_CAUSE_FPX (1 << 1) /* fetch packet exception */
+#define EXCEPT_CAUSE_IFX (1 << 0) /* instruction fetch exception */
+
+struct exception_info {
+ char *kernel_str;
+ int signo;
+ int code;
+};
+
+extern int (*c6x_nmi_handler)(struct pt_regs *regs);
+
+#endif /* _ASM_C6X_TRAPS_H */
diff --git a/arch/c6x/include/asm/uaccess.h b/arch/c6x/include/asm/uaccess.h
new file mode 100644
index 00000000000..453dd263bee
--- /dev/null
+++ b/arch/c6x/include/asm/uaccess.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_UACCESS_H
+#define _ASM_C6X_UACCESS_H
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+#include <linux/string.h>
+
+#ifdef CONFIG_ACCESS_CHECK
+#define __access_ok _access_ok
+#endif
+
+/*
+ * __copy_from_user/copy_to_user are based on ones in asm-generic/uaccess.h
+ *
+ * C6X supports unaligned 32 and 64 bit loads and stores.
+ */
+static inline __must_check long __copy_from_user(void *to,
+ const void __user *from, unsigned long n)
+{
+ u32 tmp32;
+ u64 tmp64;
+
+ if (__builtin_constant_p(n)) {
+ switch (n) {
+ case 1:
+ *(u8 *)to = *(u8 __force *)from;
+ return 0;
+ case 4:
+ asm volatile ("ldnw .d1t1 *%2,%0\n"
+ "nop 4\n"
+ "stnw .d1t1 %0,*%1\n"
+ : "=&a"(tmp32)
+ : "A"(to), "a"(from)
+ : "memory");
+ return 0;
+ case 8:
+ asm volatile ("ldndw .d1t1 *%2,%0\n"
+ "nop 4\n"
+ "stndw .d1t1 %0,*%1\n"
+ : "=&a"(tmp64)
+ : "a"(to), "a"(from)
+ : "memory");
+ return 0;
+ default:
+ break;
+ }
+ }
+
+ memcpy(to, (const void __force *)from, n);
+ return 0;
+}
+
+static inline __must_check long __copy_to_user(void __user *to,
+ const void *from, unsigned long n)
+{
+ u32 tmp32;
+ u64 tmp64;
+
+ if (__builtin_constant_p(n)) {
+ switch (n) {
+ case 1:
+ *(u8 __force *)to = *(u8 *)from;
+ return 0;
+ case 4:
+ asm volatile ("ldnw .d1t1 *%2,%0\n"
+ "nop 4\n"
+ "stnw .d1t1 %0,*%1\n"
+ : "=&a"(tmp32)
+ : "a"(to), "a"(from)
+ : "memory");
+ return 0;
+ case 8:
+ asm volatile ("ldndw .d1t1 *%2,%0\n"
+ "nop 4\n"
+ "stndw .d1t1 %0,*%1\n"
+ : "=&a"(tmp64)
+ : "a"(to), "a"(from)
+ : "memory");
+ return 0;
+ default:
+ break;
+ }
+ }
+
+ memcpy((void __force *)to, from, n);
+ return 0;
+}
+
+#define __copy_to_user __copy_to_user
+#define __copy_from_user __copy_from_user
+
+extern int _access_ok(unsigned long addr, unsigned long size);
+#ifdef CONFIG_ACCESS_CHECK
+#define __access_ok _access_ok
+#endif
+
+#include <asm-generic/uaccess.h>
+
+#endif /* _ASM_C6X_UACCESS_H */
diff --git a/arch/c6x/include/asm/unaligned.h b/arch/c6x/include/asm/unaligned.h
new file mode 100644
index 00000000000..b976cb740ea
--- /dev/null
+++ b/arch/c6x/include/asm/unaligned.h
@@ -0,0 +1,170 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ * Rewritten for 2.6.3x: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_UNALIGNED_H
+#define _ASM_C6X_UNALIGNED_H
+
+#include <linux/swab.h>
+
+/*
+ * The C64x+ can do unaligned word and dword accesses in hardware
+ * using special load/store instructions.
+ */
+
+static inline u16 get_unaligned_le16(const void *p)
+{
+ const u8 *_p = p;
+ return _p[0] | _p[1] << 8;
+}
+
+static inline u16 get_unaligned_be16(const void *p)
+{
+ const u8 *_p = p;
+ return _p[0] << 8 | _p[1];
+}
+
+static inline void put_unaligned_le16(u16 val, void *p)
+{
+ u8 *_p = p;
+ _p[0] = val;
+ _p[1] = val >> 8;
+}
+
+static inline void put_unaligned_be16(u16 val, void *p)
+{
+ u8 *_p = p;
+ _p[0] = val >> 8;
+ _p[1] = val;
+}
+
+static inline u32 get_unaligned32(const void *p)
+{
+ u32 val = (u32) p;
+ asm (" ldnw .d1t1 *%0,%0\n"
+ " nop 4\n"
+ : "+a"(val));
+ return val;
+}
+
+static inline void put_unaligned32(u32 val, void *p)
+{
+ asm volatile (" stnw .d2t1 %0,*%1\n"
+ : : "a"(val), "b"(p) : "memory");
+}
+
+static inline u64 get_unaligned64(const void *p)
+{
+ u64 val;
+ asm volatile (" ldndw .d1t1 *%1,%0\n"
+ " nop 4\n"
+ : "=a"(val) : "a"(p));
+ return val;
+}
+
+static inline void put_unaligned64(u64 val, const void *p)
+{
+ asm volatile (" stndw .d2t1 %0,*%1\n"
+ : : "a"(val), "b"(p) : "memory");
+}
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+
+#define get_unaligned_le32(p) __swab32(get_unaligned32(p))
+#define get_unaligned_le64(p) __swab64(get_unaligned64(p))
+#define get_unaligned_be32(p) get_unaligned32(p)
+#define get_unaligned_be64(p) get_unaligned64(p)
+#define put_unaligned_le32(v, p) put_unaligned32(__swab32(v), (p))
+#define put_unaligned_le64(v, p) put_unaligned64(__swab64(v), (p))
+#define put_unaligned_be32(v, p) put_unaligned32((v), (p))
+#define put_unaligned_be64(v, p) put_unaligned64((v), (p))
+#define get_unaligned __get_unaligned_be
+#define put_unaligned __put_unaligned_be
+
+#else
+
+#define get_unaligned_le32(p) get_unaligned32(p)
+#define get_unaligned_le64(p) get_unaligned64(p)
+#define get_unaligned_be32(p) __swab32(get_unaligned32(p))
+#define get_unaligned_be64(p) __swab64(get_unaligned64(p))
+#define put_unaligned_le32(v, p) put_unaligned32((v), (p))
+#define put_unaligned_le64(v, p) put_unaligned64((v), (p))
+#define put_unaligned_be32(v, p) put_unaligned32(__swab32(v), (p))
+#define put_unaligned_be64(v, p) put_unaligned64(__swab64(v), (p))
+#define get_unaligned __get_unaligned_le
+#define put_unaligned __put_unaligned_le
+
+#endif
+
+/*
+ * Cause a link-time error if we try an unaligned access other than
+ * 1,2,4 or 8 bytes long
+ */
+extern int __bad_unaligned_access_size(void);
+
+#define __get_unaligned_le(ptr) (typeof(*(ptr)))({ \
+ sizeof(*(ptr)) == 1 ? *(ptr) : \
+ (sizeof(*(ptr)) == 2 ? get_unaligned_le16((ptr)) : \
+ (sizeof(*(ptr)) == 4 ? get_unaligned_le32((ptr)) : \
+ (sizeof(*(ptr)) == 8 ? get_unaligned_le64((ptr)) : \
+ __bad_unaligned_access_size()))); \
+ })
+
+#define __get_unaligned_be(ptr) (__force typeof(*(ptr)))({ \
+ sizeof(*(ptr)) == 1 ? *(ptr) : \
+ (sizeof(*(ptr)) == 2 ? get_unaligned_be16((ptr)) : \
+ (sizeof(*(ptr)) == 4 ? get_unaligned_be32((ptr)) : \
+ (sizeof(*(ptr)) == 8 ? get_unaligned_be64((ptr)) : \
+ __bad_unaligned_access_size()))); \
+ })
+
+#define __put_unaligned_le(val, ptr) ({ \
+ void *__gu_p = (ptr); \
+ switch (sizeof(*(ptr))) { \
+ case 1: \
+ *(u8 *)__gu_p = (__force u8)(val); \
+ break; \
+ case 2: \
+ put_unaligned_le16((__force u16)(val), __gu_p); \
+ break; \
+ case 4: \
+ put_unaligned_le32((__force u32)(val), __gu_p); \
+ break; \
+ case 8: \
+ put_unaligned_le64((__force u64)(val), __gu_p); \
+ break; \
+ default: \
+ __bad_unaligned_access_size(); \
+ break; \
+ } \
+ (void)0; })
+
+#define __put_unaligned_be(val, ptr) ({ \
+ void *__gu_p = (ptr); \
+ switch (sizeof(*(ptr))) { \
+ case 1: \
+ *(u8 *)__gu_p = (__force u8)(val); \
+ break; \
+ case 2: \
+ put_unaligned_be16((__force u16)(val), __gu_p); \
+ break; \
+ case 4: \
+ put_unaligned_be32((__force u32)(val), __gu_p); \
+ break; \
+ case 8: \
+ put_unaligned_be64((__force u64)(val), __gu_p); \
+ break; \
+ default: \
+ __bad_unaligned_access_size(); \
+ break; \
+ } \
+ (void)0; })
+
+#endif /* _ASM_C6X_UNALIGNED_H */
diff --git a/arch/c6x/include/asm/unistd.h b/arch/c6x/include/asm/unistd.h
new file mode 100644
index 00000000000..6d54ea4262e
--- /dev/null
+++ b/arch/c6x/include/asm/unistd.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ *
+ * Based on arch/tile version.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+#if !defined(_ASM_C6X_UNISTD_H) || defined(__SYSCALL)
+#define _ASM_C6X_UNISTD_H
+
+/* Use the standard ABI for syscalls. */
+#include <asm-generic/unistd.h>
+
+/* C6X-specific syscalls. */
+#define __NR_cache_sync (__NR_arch_specific_syscall + 0)
+__SYSCALL(__NR_cache_sync, sys_cache_sync)
+
+#endif /* _ASM_C6X_UNISTD_H */
diff --git a/arch/c6x/kernel/Makefile b/arch/c6x/kernel/Makefile
new file mode 100644
index 00000000000..580a515a944
--- /dev/null
+++ b/arch/c6x/kernel/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for arch/c6x/kernel/
+#
+
+extra-y := head.o vmlinux.lds
+
+obj-y := process.o traps.o irq.o signal.o ptrace.o
+obj-y += setup.o sys_c6x.o time.o devicetree.o
+obj-y += switch_to.o entry.o vectors.o c6x_ksyms.o
+obj-y += soc.o dma.o
+
+obj-$(CONFIG_MODULES) += module.o
diff --git a/arch/c6x/kernel/asm-offsets.c b/arch/c6x/kernel/asm-offsets.c
new file mode 100644
index 00000000000..759ad6d207b
--- /dev/null
+++ b/arch/c6x/kernel/asm-offsets.c
@@ -0,0 +1,123 @@
+/*
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed
+ * to extract and format the required data.
+ */
+
+#include <linux/sched.h>
+#include <linux/thread_info.h>
+#include <asm/procinfo.h>
+#include <linux/kbuild.h>
+#include <linux/unistd.h>
+
+void foo(void)
+{
+ OFFSET(REGS_A16, pt_regs, a16);
+ OFFSET(REGS_A17, pt_regs, a17);
+ OFFSET(REGS_A18, pt_regs, a18);
+ OFFSET(REGS_A19, pt_regs, a19);
+ OFFSET(REGS_A20, pt_regs, a20);
+ OFFSET(REGS_A21, pt_regs, a21);
+ OFFSET(REGS_A22, pt_regs, a22);
+ OFFSET(REGS_A23, pt_regs, a23);
+ OFFSET(REGS_A24, pt_regs, a24);
+ OFFSET(REGS_A25, pt_regs, a25);
+ OFFSET(REGS_A26, pt_regs, a26);
+ OFFSET(REGS_A27, pt_regs, a27);
+ OFFSET(REGS_A28, pt_regs, a28);
+ OFFSET(REGS_A29, pt_regs, a29);
+ OFFSET(REGS_A30, pt_regs, a30);
+ OFFSET(REGS_A31, pt_regs, a31);
+
+ OFFSET(REGS_B16, pt_regs, b16);
+ OFFSET(REGS_B17, pt_regs, b17);
+ OFFSET(REGS_B18, pt_regs, b18);
+ OFFSET(REGS_B19, pt_regs, b19);
+ OFFSET(REGS_B20, pt_regs, b20);
+ OFFSET(REGS_B21, pt_regs, b21);
+ OFFSET(REGS_B22, pt_regs, b22);
+ OFFSET(REGS_B23, pt_regs, b23);
+ OFFSET(REGS_B24, pt_regs, b24);
+ OFFSET(REGS_B25, pt_regs, b25);
+ OFFSET(REGS_B26, pt_regs, b26);
+ OFFSET(REGS_B27, pt_regs, b27);
+ OFFSET(REGS_B28, pt_regs, b28);
+ OFFSET(REGS_B29, pt_regs, b29);
+ OFFSET(REGS_B30, pt_regs, b30);
+ OFFSET(REGS_B31, pt_regs, b31);
+
+ OFFSET(REGS_A0, pt_regs, a0);
+ OFFSET(REGS_A1, pt_regs, a1);
+ OFFSET(REGS_A2, pt_regs, a2);
+ OFFSET(REGS_A3, pt_regs, a3);
+ OFFSET(REGS_A4, pt_regs, a4);
+ OFFSET(REGS_A5, pt_regs, a5);
+ OFFSET(REGS_A6, pt_regs, a6);
+ OFFSET(REGS_A7, pt_regs, a7);
+ OFFSET(REGS_A8, pt_regs, a8);
+ OFFSET(REGS_A9, pt_regs, a9);
+ OFFSET(REGS_A10, pt_regs, a10);
+ OFFSET(REGS_A11, pt_regs, a11);
+ OFFSET(REGS_A12, pt_regs, a12);
+ OFFSET(REGS_A13, pt_regs, a13);
+ OFFSET(REGS_A14, pt_regs, a14);
+ OFFSET(REGS_A15, pt_regs, a15);
+
+ OFFSET(REGS_B0, pt_regs, b0);
+ OFFSET(REGS_B1, pt_regs, b1);
+ OFFSET(REGS_B2, pt_regs, b2);
+ OFFSET(REGS_B3, pt_regs, b3);
+ OFFSET(REGS_B4, pt_regs, b4);
+ OFFSET(REGS_B5, pt_regs, b5);
+ OFFSET(REGS_B6, pt_regs, b6);
+ OFFSET(REGS_B7, pt_regs, b7);
+ OFFSET(REGS_B8, pt_regs, b8);
+ OFFSET(REGS_B9, pt_regs, b9);
+ OFFSET(REGS_B10, pt_regs, b10);
+ OFFSET(REGS_B11, pt_regs, b11);
+ OFFSET(REGS_B12, pt_regs, b12);
+ OFFSET(REGS_B13, pt_regs, b13);
+ OFFSET(REGS_DP, pt_regs, dp);
+ OFFSET(REGS_SP, pt_regs, sp);
+
+ OFFSET(REGS_TSR, pt_regs, tsr);
+ OFFSET(REGS_ORIG_A4, pt_regs, orig_a4);
+
+ DEFINE(REGS__END, sizeof(struct pt_regs));
+ BLANK();
+
+ OFFSET(THREAD_PC, thread_struct, pc);
+ OFFSET(THREAD_B15_14, thread_struct, b15_14);
+ OFFSET(THREAD_A15_14, thread_struct, a15_14);
+ OFFSET(THREAD_B13_12, thread_struct, b13_12);
+ OFFSET(THREAD_A13_12, thread_struct, a13_12);
+ OFFSET(THREAD_B11_10, thread_struct, b11_10);
+ OFFSET(THREAD_A11_10, thread_struct, a11_10);
+ OFFSET(THREAD_RICL_ICL, thread_struct, ricl_icl);
+ BLANK();
+
+ OFFSET(TASK_STATE, task_struct, state);
+ BLANK();
+
+ OFFSET(THREAD_INFO_FLAGS, thread_info, flags);
+ OFFSET(THREAD_INFO_PREEMPT_COUNT, thread_info, preempt_count);
+ BLANK();
+
+ /* These would be unneccessary if we ran asm files
+ * through the preprocessor.
+ */
+ DEFINE(KTHREAD_SIZE, THREAD_SIZE);
+ DEFINE(KTHREAD_SHIFT, THREAD_SHIFT);
+ DEFINE(KTHREAD_START_SP, THREAD_START_SP);
+ DEFINE(ENOSYS_, ENOSYS);
+ DEFINE(NR_SYSCALLS_, __NR_syscalls);
+
+ DEFINE(_TIF_SYSCALL_TRACE, (1<<TIF_SYSCALL_TRACE));
+ DEFINE(_TIF_NOTIFY_RESUME, (1<<TIF_NOTIFY_RESUME));
+ DEFINE(_TIF_SIGPENDING, (1<<TIF_SIGPENDING));
+ DEFINE(_TIF_NEED_RESCHED, (1<<TIF_NEED_RESCHED));
+ DEFINE(_TIF_POLLING_NRFLAG, (1<<TIF_POLLING_NRFLAG));
+
+ DEFINE(_TIF_ALLWORK_MASK, TIF_ALLWORK_MASK);
+ DEFINE(_TIF_WORK_MASK, TIF_WORK_MASK);
+}
diff --git a/arch/c6x/kernel/c6x_ksyms.c b/arch/c6x/kernel/c6x_ksyms.c
new file mode 100644
index 00000000000..0ba3e0bba3e
--- /dev/null
+++ b/arch/c6x/kernel/c6x_ksyms.c
@@ -0,0 +1,66 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/module.h>
+#include <asm/checksum.h>
+#include <linux/io.h>
+
+/*
+ * libgcc functions - used internally by the compiler...
+ */
+extern int __c6xabi_divi(int dividend, int divisor);
+EXPORT_SYMBOL(__c6xabi_divi);
+
+extern unsigned __c6xabi_divu(unsigned dividend, unsigned divisor);
+EXPORT_SYMBOL(__c6xabi_divu);
+
+extern int __c6xabi_remi(int dividend, int divisor);
+EXPORT_SYMBOL(__c6xabi_remi);
+
+extern unsigned __c6xabi_remu(unsigned dividend, unsigned divisor);
+EXPORT_SYMBOL(__c6xabi_remu);
+
+extern int __c6xabi_divremi(int dividend, int divisor);
+EXPORT_SYMBOL(__c6xabi_divremi);
+
+extern unsigned __c6xabi_divremu(unsigned dividend, unsigned divisor);
+EXPORT_SYMBOL(__c6xabi_divremu);
+
+extern unsigned long long __c6xabi_mpyll(unsigned long long src1,
+ unsigned long long src2);
+EXPORT_SYMBOL(__c6xabi_mpyll);
+
+extern long long __c6xabi_negll(long long src);
+EXPORT_SYMBOL(__c6xabi_negll);
+
+extern unsigned long long __c6xabi_llshl(unsigned long long src1, uint src2);
+EXPORT_SYMBOL(__c6xabi_llshl);
+
+extern long long __c6xabi_llshr(long long src1, uint src2);
+EXPORT_SYMBOL(__c6xabi_llshr);
+
+extern unsigned long long __c6xabi_llshru(unsigned long long src1, uint src2);
+EXPORT_SYMBOL(__c6xabi_llshru);
+
+extern void __c6xabi_strasgi(int *dst, const int *src, unsigned cnt);
+EXPORT_SYMBOL(__c6xabi_strasgi);
+
+extern void __c6xabi_push_rts(void);
+EXPORT_SYMBOL(__c6xabi_push_rts);
+
+extern void __c6xabi_pop_rts(void);
+EXPORT_SYMBOL(__c6xabi_pop_rts);
+
+extern void __c6xabi_strasgi_64plus(int *dst, const int *src, unsigned cnt);
+EXPORT_SYMBOL(__c6xabi_strasgi_64plus);
+
+/* lib functions */
+EXPORT_SYMBOL(memcpy);
diff --git a/arch/c6x/kernel/devicetree.c b/arch/c6x/kernel/devicetree.c
new file mode 100644
index 00000000000..bdb56f09d0a
--- /dev/null
+++ b/arch/c6x/kernel/devicetree.c
@@ -0,0 +1,53 @@
+/*
+ * Architecture specific OF callbacks.
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/initrd.h>
+#include <linux/memblock.h>
+
+void __init early_init_devtree(void *params)
+{
+ /* Setup flat device-tree pointer */
+ initial_boot_params = params;
+
+ /* Retrieve various informations from the /chosen node of the
+ * device-tree, including the platform type, initrd location and
+ * size and more ...
+ */
+ of_scan_flat_dt(early_init_dt_scan_chosen, c6x_command_line);
+
+ /* Scan memory nodes and rebuild MEMBLOCKs */
+ of_scan_flat_dt(early_init_dt_scan_root, NULL);
+ of_scan_flat_dt(early_init_dt_scan_memory, NULL);
+}
+
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void __init early_init_dt_setup_initrd_arch(unsigned long start,
+ unsigned long end)
+{
+ initrd_start = (unsigned long)__va(start);
+ initrd_end = (unsigned long)__va(end);
+ initrd_below_start_ok = 1;
+}
+#endif
+
+void __init early_init_dt_add_memory_arch(u64 base, u64 size)
+{
+ c6x_add_memory(base, size);
+}
+
+void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
+{
+ return __va(memblock_alloc(size, align));
+}
diff --git a/arch/c6x/kernel/dma.c b/arch/c6x/kernel/dma.c
new file mode 100644
index 00000000000..ab7b12de144
--- /dev/null
+++ b/arch/c6x/kernel/dma.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/mm.h>
+#include <linux/mm_types.h>
+#include <linux/scatterlist.h>
+
+#include <asm/cacheflush.h>
+
+static void c6x_dma_sync(dma_addr_t handle, size_t size,
+ enum dma_data_direction dir)
+{
+ unsigned long paddr = handle;
+
+ BUG_ON(!valid_dma_direction(dir));
+
+ switch (dir) {
+ case DMA_FROM_DEVICE:
+ L2_cache_block_invalidate(paddr, paddr + size);
+ break;
+ case DMA_TO_DEVICE:
+ L2_cache_block_writeback(paddr, paddr + size);
+ break;
+ case DMA_BIDIRECTIONAL:
+ L2_cache_block_writeback_invalidate(paddr, paddr + size);
+ break;
+ default:
+ break;
+ }
+}
+
+dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
+ enum dma_data_direction dir)
+{
+ dma_addr_t addr = virt_to_phys(ptr);
+
+ c6x_dma_sync(addr, size, dir);
+
+ debug_dma_map_page(dev, virt_to_page(ptr),
+ (unsigned long)ptr & ~PAGE_MASK, size,
+ dir, addr, true);
+ return addr;
+}
+EXPORT_SYMBOL(dma_map_single);
+
+
+void dma_unmap_single(struct device *dev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir)
+{
+ c6x_dma_sync(handle, size, dir);
+
+ debug_dma_unmap_page(dev, handle, size, dir, true);
+}
+EXPORT_SYMBOL(dma_unmap_single);
+
+
+int dma_map_sg(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction dir)
+{
+ struct scatterlist *sg;
+ int i;
+
+ for_each_sg(sglist, sg, nents, i)
+ sg->dma_address = dma_map_single(dev, sg_virt(sg), sg->length,
+ dir);
+
+ debug_dma_map_sg(dev, sglist, nents, nents, dir);
+
+ return nents;
+}
+EXPORT_SYMBOL(dma_map_sg);
+
+
+void dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction dir)
+{
+ struct scatterlist *sg;
+ int i;
+
+ for_each_sg(sglist, sg, nents, i)
+ dma_unmap_single(dev, sg_dma_address(sg), sg->length, dir);
+
+ debug_dma_unmap_sg(dev, sglist, nents, dir);
+}
+EXPORT_SYMBOL(dma_unmap_sg);
+
+void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir)
+{
+ c6x_dma_sync(handle, size, dir);
+
+ debug_dma_sync_single_for_cpu(dev, handle, size, dir);
+}
+EXPORT_SYMBOL(dma_sync_single_for_cpu);
+
+
+void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir)
+{
+ c6x_dma_sync(handle, size, dir);
+
+ debug_dma_sync_single_for_device(dev, handle, size, dir);
+}
+EXPORT_SYMBOL(dma_sync_single_for_device);
+
+
+void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction dir)
+{
+ struct scatterlist *sg;
+ int i;
+
+ for_each_sg(sglist, sg, nents, i)
+ dma_sync_single_for_cpu(dev, sg_dma_address(sg),
+ sg->length, dir);
+
+ debug_dma_sync_sg_for_cpu(dev, sglist, nents, dir);
+}
+EXPORT_SYMBOL(dma_sync_sg_for_cpu);
+
+
+void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist,
+ int nents, enum dma_data_direction dir)
+{
+ struct scatterlist *sg;
+ int i;
+
+ for_each_sg(sglist, sg, nents, i)
+ dma_sync_single_for_device(dev, sg_dma_address(sg),
+ sg->length, dir);
+
+ debug_dma_sync_sg_for_device(dev, sglist, nents, dir);
+}
+EXPORT_SYMBOL(dma_sync_sg_for_device);
+
+
+/* Number of entries preallocated for DMA-API debugging */
+#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
+
+static int __init dma_init(void)
+{
+ dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
+
+ return 0;
+}
+fs_initcall(dma_init);
diff --git a/arch/c6x/kernel/entry.S b/arch/c6x/kernel/entry.S
new file mode 100644
index 00000000000..3e977ccda82
--- /dev/null
+++ b/arch/c6x/kernel/entry.S
@@ -0,0 +1,803 @@
+;
+; Port on Texas Instruments TMS320C6x architecture
+;
+; Copyright (C) 2004-2011 Texas Instruments Incorporated
+; Author: Aurelien Jacquiot (aurelien.jacquiot@virtuallogix.com)
+; Updated for 2.6.34: Mark Salter <msalter@redhat.com>
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License version 2 as
+; published by the Free Software Foundation.
+;
+
+#include <linux/sys.h>
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/asm-offsets.h>
+#include <asm/unistd.h>
+#include <asm/errno.h>
+
+; Registers naming
+#define DP B14
+#define SP B15
+
+#ifndef CONFIG_PREEMPT
+#define resume_kernel restore_all
+#endif
+
+ .altmacro
+
+ .macro MASK_INT reg
+ MVC .S2 CSR,reg
+ CLR .S2 reg,0,0,reg
+ MVC .S2 reg,CSR
+ .endm
+
+ .macro UNMASK_INT reg
+ MVC .S2 CSR,reg
+ SET .S2 reg,0,0,reg
+ MVC .S2 reg,CSR
+ .endm
+
+ .macro GET_THREAD_INFO reg
+ SHR .S1X SP,THREAD_SHIFT,reg
+ SHL .S1 reg,THREAD_SHIFT,reg
+ .endm
+
+ ;;
+ ;; This defines the normal kernel pt_regs layout.
+ ;;
+ .macro SAVE_ALL __rp __tsr
+ STW .D2T2 B0,*SP--[2] ; save original B0
+ MVKL .S2 current_ksp,B0
+ MVKH .S2 current_ksp,B0
+ LDW .D2T2 *B0,B1 ; KSP
+
+ NOP 3
+ STW .D2T2 B1,*+SP[1] ; save original B1
+ XOR .D2 SP,B1,B0 ; (SP ^ KSP)
+ LDW .D2T2 *+SP[1],B1 ; restore B0/B1
+ LDW .D2T2 *++SP[2],B0
+ SHR .S2 B0,THREAD_SHIFT,B0 ; 0 if already using kstack
+ [B0] STDW .D2T2 SP:DP,*--B1[1] ; user: save user sp/dp kstack
+ [B0] MV .S2 B1,SP ; and switch to kstack
+||[!B0] STDW .D2T2 SP:DP,*--SP[1] ; kernel: save on current stack
+
+ SUBAW .D2 SP,2,SP
+
+ ADD .D1X SP,-8,A15
+ || STDW .D2T1 A15:A14,*SP--[16] ; save A15:A14
+
+ STDW .D2T2 B13:B12,*SP--[1]
+ || STDW .D1T1 A13:A12,*A15--[1]
+ || MVC .S2 __rp,B13
+
+ STDW .D2T2 B11:B10,*SP--[1]
+ || STDW .D1T1 A11:A10,*A15--[1]
+ || MVC .S2 CSR,B12
+
+ STDW .D2T2 B9:B8,*SP--[1]
+ || STDW .D1T1 A9:A8,*A15--[1]
+ || MVC .S2 RILC,B11
+ STDW .D2T2 B7:B6,*SP--[1]
+ || STDW .D1T1 A7:A6,*A15--[1]
+ || MVC .S2 ILC,B10
+
+ STDW .D2T2 B5:B4,*SP--[1]
+ || STDW .D1T1 A5:A4,*A15--[1]
+
+ STDW .D2T2 B3:B2,*SP--[1]
+ || STDW .D1T1 A3:A2,*A15--[1]
+ || MVC .S2 __tsr,B5
+
+ STDW .D2T2 B1:B0,*SP--[1]
+ || STDW .D1T1 A1:A0,*A15--[1]
+ || MV .S1X B5,A5
+
+ STDW .D2T2 B31:B30,*SP--[1]
+ || STDW .D1T1 A31:A30,*A15--[1]
+ STDW .D2T2 B29:B28,*SP--[1]
+ || STDW .D1T1 A29:A28,*A15--[1]
+ STDW .D2T2 B27:B26,*SP--[1]
+ || STDW .D1T1 A27:A26,*A15--[1]
+ STDW .D2T2 B25:B24,*SP--[1]
+ || STDW .D1T1 A25:A24,*A15--[1]
+ STDW .D2T2 B23:B22,*SP--[1]
+ || STDW .D1T1 A23:A22,*A15--[1]
+ STDW .D2T2 B21:B20,*SP--[1]
+ || STDW .D1T1 A21:A20,*A15--[1]
+ STDW .D2T2 B19:B18,*SP--[1]
+ || STDW .D1T1 A19:A18,*A15--[1]
+ STDW .D2T2 B17:B16,*SP--[1]
+ || STDW .D1T1 A17:A16,*A15--[1]
+
+ STDW .D2T2 B13:B12,*SP--[1] ; save PC and CSR
+
+ STDW .D2T2 B11:B10,*SP--[1] ; save RILC and ILC
+ STDW .D2T1 A5:A4,*SP--[1] ; save TSR and orig A4
+
+ ;; We left an unused word on the stack just above pt_regs.
+ ;; It is used to save whether or not this frame is due to
+ ;; a syscall. It is cleared here, but the syscall handler
+ ;; sets it to a non-zero value.
+ MVK .L2 0,B1
+ STW .D2T2 B1,*+SP(REGS__END+8) ; clear syscall flag
+ .endm
+
+ .macro RESTORE_ALL __rp __tsr
+ LDDW .D2T2 *++SP[1],B9:B8 ; get TSR (B9)
+ LDDW .D2T2 *++SP[1],B11:B10 ; get RILC (B11) and ILC (B10)
+ LDDW .D2T2 *++SP[1],B13:B12 ; get PC (B13) and CSR (B12)
+
+ ADDAW .D1X SP,30,A15
+
+ LDDW .D1T1 *++A15[1],A17:A16
+ || LDDW .D2T2 *++SP[1],B17:B16
+ LDDW .D1T1 *++A15[1],A19:A18
+ || LDDW .D2T2 *++SP[1],B19:B18
+ LDDW .D1T1 *++A15[1],A21:A20
+ || LDDW .D2T2 *++SP[1],B21:B20
+ LDDW .D1T1 *++A15[1],A23:A22
+ || LDDW .D2T2 *++SP[1],B23:B22
+ LDDW .D1T1 *++A15[1],A25:A24
+ || LDDW .D2T2 *++SP[1],B25:B24
+ LDDW .D1T1 *++A15[1],A27:A26
+ || LDDW .D2T2 *++SP[1],B27:B26
+ LDDW .D1T1 *++A15[1],A29:A28
+ || LDDW .D2T2 *++SP[1],B29:B28
+ LDDW .D1T1 *++A15[1],A31:A30
+ || LDDW .D2T2 *++SP[1],B31:B30
+
+ LDDW .D1T1 *++A15[1],A1:A0
+ || LDDW .D2T2 *++SP[1],B1:B0
+
+ LDDW .D1T1 *++A15[1],A3:A2
+ || LDDW .D2T2 *++SP[1],B3:B2
+ || MVC .S2 B9,__tsr
+ LDDW .D1T1 *++A15[1],A5:A4
+ || LDDW .D2T2 *++SP[1],B5:B4
+ || MVC .S2 B11,RILC
+ LDDW .D1T1 *++A15[1],A7:A6
+ || LDDW .D2T2 *++SP[1],B7:B6
+ || MVC .S2 B10,ILC
+
+ LDDW .D1T1 *++A15[1],A9:A8
+ || LDDW .D2T2 *++SP[1],B9:B8
+ || MVC .S2 B13,__rp
+
+ LDDW .D1T1 *++A15[1],A11:A10
+ || LDDW .D2T2 *++SP[1],B11:B10
+ || MVC .S2 B12,CSR
+
+ LDDW .D1T1 *++A15[1],A13:A12
+ || LDDW .D2T2 *++SP[1],B13:B12
+
+ MV .D2X A15,SP
+ || MVKL .S1 current_ksp,A15
+ MVKH .S1 current_ksp,A15
+ || ADDAW .D1X SP,6,A14
+ STW .D1T1 A14,*A15 ; save kernel stack pointer
+
+ LDDW .D2T1 *++SP[1],A15:A14
+
+ B .S2 __rp ; return from interruption
+ LDDW .D2T2 *+SP[1],SP:DP
+ NOP 4
+ .endm
+
+ .section .text
+
+ ;;
+ ;; Jump to schedule() then return to ret_from_exception
+ ;;
+_reschedule:
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 schedule,A0
+ MVKH .S1 schedule,A0
+ B .S2X A0
+#else
+ B .S1 schedule
+#endif
+ ADDKPC .S2 ret_from_exception,B3,4
+
+ ;;
+ ;; Called before syscall handler when process is being debugged
+ ;;
+tracesys_on:
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 syscall_trace_entry,A0
+ MVKH .S1 syscall_trace_entry,A0
+ B .S2X A0
+#else
+ B .S1 syscall_trace_entry
+#endif
+ ADDKPC .S2 ret_from_syscall_trace,B3,3
+ ADD .S1X 8,SP,A4
+
+ret_from_syscall_trace:
+ ;; tracing returns (possibly new) syscall number
+ MV .D2X A4,B0
+ || MVK .S2 __NR_syscalls,B1
+ CMPLTU .L2 B0,B1,B1
+
+ [!B1] BNOP .S2 ret_from_syscall_function,5
+ || MVK .S1 -ENOSYS,A4
+
+ ;; reload syscall args from (possibly modified) stack frame
+ ;; and get syscall handler addr from sys_call_table:
+ LDW .D2T2 *+SP(REGS_B4+8),B4
+ || MVKL .S2 sys_call_table,B1
+ LDW .D2T1 *+SP(REGS_A6+8),A6
+ || MVKH .S2 sys_call_table,B1
+ LDW .D2T2 *+B1[B0],B0
+ || MVKL .S2 ret_from_syscall_function,B3
+ LDW .D2T2 *+SP(REGS_B6+8),B6
+ || MVKH .S2 ret_from_syscall_function,B3
+ LDW .D2T1 *+SP(REGS_A8+8),A8
+ LDW .D2T2 *+SP(REGS_B8+8),B8
+ NOP
+ ; B0 = sys_call_table[__NR_*]
+ BNOP .S2 B0,5 ; branch to syscall handler
+ || LDW .D2T1 *+SP(REGS_ORIG_A4+8),A4
+
+syscall_exit_work:
+ AND .D1 _TIF_SYSCALL_TRACE,A2,A0
+ [!A0] BNOP .S1 work_pending,5
+ [A0] B .S2 syscall_trace_exit
+ ADDKPC .S2 resume_userspace,B3,1
+ MVC .S2 CSR,B1
+ SET .S2 B1,0,0,B1
+ MVC .S2 B1,CSR ; enable ints
+
+work_pending:
+ AND .D1 _TIF_NEED_RESCHED,A2,A0
+ [!A0] BNOP .S1 work_notifysig,5
+
+work_resched:
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 schedule,A1
+ MVKH .S1 schedule,A1
+ B .S2X A1
+#else
+ B .S2 schedule
+#endif
+ ADDKPC .S2 work_rescheduled,B3,4
+work_rescheduled:
+ ;; make sure we don't miss an interrupt setting need_resched or
+ ;; sigpending between sampling and the rti
+ MASK_INT B2
+ GET_THREAD_INFO A12
+ LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
+ MVK .S1 _TIF_WORK_MASK,A1
+ MVK .S1 _TIF_NEED_RESCHED,A3
+ NOP 2
+ AND .D1 A1,A2,A0
+ || AND .S1 A3,A2,A1
+ [!A0] BNOP .S1 restore_all,5
+ [A1] BNOP .S1 work_resched,5
+
+work_notifysig:
+ B .S2 do_notify_resume
+ LDW .D2T1 *+SP(REGS__END+8),A6 ; syscall flag
+ ADDKPC .S2 resume_userspace,B3,1
+ ADD .S1X 8,SP,A4 ; pt_regs pointer is first arg
+ MV .D2X A2,B4 ; thread_info flags is second arg
+
+ ;;
+ ;; On C64x+, the return way from exception and interrupt
+ ;; is a little bit different
+ ;;
+ENTRY(ret_from_exception)
+#ifdef CONFIG_PREEMPT
+ MASK_INT B2
+#endif
+
+ENTRY(ret_from_interrupt)
+ ;;
+ ;; Check if we are comming from user mode.
+ ;;
+ LDW .D2T2 *+SP(REGS_TSR+8),B0
+ MVK .S2 0x40,B1
+ NOP 3
+ AND .D2 B0,B1,B0
+ [!B0] BNOP .S2 resume_kernel,5
+
+resume_userspace:
+ ;; make sure we don't miss an interrupt setting need_resched or
+ ;; sigpending between sampling and the rti
+ MASK_INT B2
+ GET_THREAD_INFO A12
+ LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
+ MVK .S1 _TIF_WORK_MASK,A1
+ MVK .S1 _TIF_NEED_RESCHED,A3
+ NOP 2
+ AND .D1 A1,A2,A0
+ [A0] BNOP .S1 work_pending,5
+ BNOP .S1 restore_all,5
+
+ ;;
+ ;; System call handling
+ ;; B0 = syscall number (in sys_call_table)
+ ;; A4,B4,A6,B6,A8,B8 = arguments of the syscall function
+ ;; A4 is the return value register
+ ;;
+system_call_saved:
+ MVK .L2 1,B2
+ STW .D2T2 B2,*+SP(REGS__END+8) ; set syscall flag
+ MVC .S2 B2,ECR ; ack the software exception
+
+ UNMASK_INT B2 ; re-enable global IT
+
+system_call_saved_noack:
+ ;; Check system call number
+ MVK .S2 __NR_syscalls,B1
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || MVKL .S1 sys_ni_syscall,A0
+#endif
+ CMPLTU .L2 B0,B1,B1
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || MVKH .S1 sys_ni_syscall,A0
+#endif
+
+ ;; Check for ptrace
+ GET_THREAD_INFO A12
+
+#ifdef CONFIG_C6X_BIG_KERNEL
+ [!B1] B .S2X A0
+#else
+ [!B1] B .S2 sys_ni_syscall
+#endif
+ [!B1] ADDKPC .S2 ret_from_syscall_function,B3,4
+
+ ;; Get syscall handler addr from sys_call_table
+ ;; call tracesys_on or call syscall handler
+ LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
+ || MVKL .S2 sys_call_table,B1
+ MVKH .S2 sys_call_table,B1
+ LDW .D2T2 *+B1[B0],B0
+ NOP 2
+ ; A2 = thread_info flags
+ AND .D1 _TIF_SYSCALL_TRACE,A2,A2
+ [A2] BNOP .S1 tracesys_on,5
+ ;; B0 = _sys_call_table[__NR_*]
+ B .S2 B0
+ ADDKPC .S2 ret_from_syscall_function,B3,4
+
+ret_from_syscall_function:
+ STW .D2T1 A4,*+SP(REGS_A4+8) ; save return value in A4
+ ; original A4 is in orig_A4
+syscall_exit:
+ ;; make sure we don't miss an interrupt setting need_resched or
+ ;; sigpending between sampling and the rti
+ MASK_INT B2
+ LDW .D1T1 *+A12(THREAD_INFO_FLAGS),A2
+ MVK .S1 _TIF_ALLWORK_MASK,A1
+ NOP 3
+ AND .D1 A1,A2,A2 ; check for work to do
+ [A2] BNOP .S1 syscall_exit_work,5
+
+restore_all:
+ RESTORE_ALL NRP,NTSR
+
+ ;;
+ ;; After a fork we jump here directly from resume,
+ ;; so that A4 contains the previous task structure.
+ ;;
+ENTRY(ret_from_fork)
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 schedule_tail,A0
+ MVKH .S1 schedule_tail,A0
+ B .S2X A0
+#else
+ B .S2 schedule_tail
+#endif
+ ADDKPC .S2 ret_from_fork_2,B3,4
+ret_from_fork_2:
+ ;; return 0 in A4 for child process
+ GET_THREAD_INFO A12
+ BNOP .S2 syscall_exit,3
+ MVK .L2 0,B0
+ STW .D2T2 B0,*+SP(REGS_A4+8)
+ENDPROC(ret_from_fork)
+
+ ;;
+ ;; These are the interrupt handlers, responsible for calling __do_IRQ()
+ ;; int6 is used for syscalls (see _system_call entry)
+ ;;
+ .macro SAVE_ALL_INT
+ SAVE_ALL IRP,ITSR
+ .endm
+
+ .macro CALL_INT int
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 c6x_do_IRQ,A0
+ MVKH .S1 c6x_do_IRQ,A0
+ BNOP .S2X A0,1
+ MVK .S1 int,A4
+ ADDAW .D2 SP,2,B4
+ MVKL .S2 ret_from_interrupt,B3
+ MVKH .S2 ret_from_interrupt,B3
+#else
+ CALLP .S2 c6x_do_IRQ,B3
+ || MVK .S1 int,A4
+ || ADDAW .D2 SP,2,B4
+ B .S1 ret_from_interrupt
+ NOP 5
+#endif
+ .endm
+
+ENTRY(_int4_handler)
+ SAVE_ALL_INT
+ CALL_INT 4
+ENDPROC(_int4_handler)
+
+ENTRY(_int5_handler)
+ SAVE_ALL_INT
+ CALL_INT 5
+ENDPROC(_int5_handler)
+
+ENTRY(_int6_handler)
+ SAVE_ALL_INT
+ CALL_INT 6
+ENDPROC(_int6_handler)
+
+ENTRY(_int7_handler)
+ SAVE_ALL_INT
+ CALL_INT 7
+ENDPROC(_int7_handler)
+
+ENTRY(_int8_handler)
+ SAVE_ALL_INT
+ CALL_INT 8
+ENDPROC(_int8_handler)
+
+ENTRY(_int9_handler)
+ SAVE_ALL_INT
+ CALL_INT 9
+ENDPROC(_int9_handler)
+
+ENTRY(_int10_handler)
+ SAVE_ALL_INT
+ CALL_INT 10
+ENDPROC(_int10_handler)
+
+ENTRY(_int11_handler)
+ SAVE_ALL_INT
+ CALL_INT 11
+ENDPROC(_int11_handler)
+
+ENTRY(_int12_handler)
+ SAVE_ALL_INT
+ CALL_INT 12
+ENDPROC(_int12_handler)
+
+ENTRY(_int13_handler)
+ SAVE_ALL_INT
+ CALL_INT 13
+ENDPROC(_int13_handler)
+
+ENTRY(_int14_handler)
+ SAVE_ALL_INT
+ CALL_INT 14
+ENDPROC(_int14_handler)
+
+ENTRY(_int15_handler)
+ SAVE_ALL_INT
+ CALL_INT 15
+ENDPROC(_int15_handler)
+
+ ;;
+ ;; Handler for uninitialized and spurious interrupts
+ ;;
+ENTRY(_bad_interrupt)
+ B .S2 IRP
+ NOP 5
+ENDPROC(_bad_interrupt)
+
+ ;;
+ ;; Entry for NMI/exceptions/syscall
+ ;;
+ENTRY(_nmi_handler)
+ SAVE_ALL NRP,NTSR
+
+ MVC .S2 EFR,B2
+ CMPEQ .L2 1,B2,B2
+ || MVC .S2 TSR,B1
+ CLR .S2 B1,10,10,B1
+ MVC .S2 B1,TSR
+#ifdef CONFIG_C6X_BIG_KERNEL
+ [!B2] MVKL .S1 process_exception,A0
+ [!B2] MVKH .S1 process_exception,A0
+ [!B2] B .S2X A0
+#else
+ [!B2] B .S2 process_exception
+#endif
+ [B2] B .S2 system_call_saved
+ [!B2] ADDAW .D2 SP,2,B1
+ [!B2] MV .D1X B1,A4
+ ADDKPC .S2 ret_from_trap,B3,2
+
+ret_from_trap:
+ MV .D2X A4,B0
+ [!B0] BNOP .S2 ret_from_exception,5
+
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S2 system_call_saved_noack,B3
+ MVKH .S2 system_call_saved_noack,B3
+#endif
+ LDW .D2T2 *+SP(REGS_B0+8),B0
+ LDW .D2T1 *+SP(REGS_A4+8),A4
+ LDW .D2T2 *+SP(REGS_B4+8),B4
+ LDW .D2T1 *+SP(REGS_A6+8),A6
+ LDW .D2T2 *+SP(REGS_B6+8),B6
+ LDW .D2T1 *+SP(REGS_A8+8),A8
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || B .S2 B3
+#else
+ || B .S2 system_call_saved_noack
+#endif
+ LDW .D2T2 *+SP(REGS_B8+8),B8
+ NOP 4
+ENDPROC(_nmi_handler)
+
+ ;;
+ ;; Jump to schedule() then return to ret_from_isr
+ ;;
+#ifdef CONFIG_PREEMPT
+resume_kernel:
+ GET_THREAD_INFO A12
+ LDW .D1T1 *+A12(THREAD_INFO_PREEMPT_COUNT),A1
+ NOP 4
+ [A1] BNOP .S2 restore_all,5
+
+preempt_schedule:
+ GET_THREAD_INFO A2
+ LDW .D1T1 *+A2(THREAD_INFO_FLAGS),A1
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S2 preempt_schedule_irq,B0
+ MVKH .S2 preempt_schedule_irq,B0
+ NOP 2
+#else
+ NOP 4
+#endif
+ AND .D1 _TIF_NEED_RESCHED,A1,A1
+ [!A1] BNOP .S2 restore_all,5
+#ifdef CONFIG_C6X_BIG_KERNEL
+ B .S2 B0
+#else
+ B .S2 preempt_schedule_irq
+#endif
+ ADDKPC .S2 preempt_schedule,B3,4
+#endif /* CONFIG_PREEMPT */
+
+ENTRY(enable_exception)
+ DINT
+ MVC .S2 TSR,B0
+ MVC .S2 B3,NRP
+ MVK .L2 0xc,B1
+ OR .D2 B0,B1,B0
+ MVC .S2 B0,TSR ; Set GEE and XEN in TSR
+ B .S2 NRP
+ NOP 5
+ENDPROC(enable_exception)
+
+ENTRY(sys_sigaltstack)
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 do_sigaltstack,A0 ; branch to do_sigaltstack
+ MVKH .S1 do_sigaltstack,A0
+ B .S2X A0
+#else
+ B .S2 do_sigaltstack
+#endif
+ LDW .D2T1 *+SP(REGS_SP+8),A6
+ NOP 4
+ENDPROC(sys_sigaltstack)
+
+ ;; kernel_execve
+ENTRY(kernel_execve)
+ MVK .S2 __NR_execve,B0
+ SWE
+ BNOP .S2 B3,5
+ENDPROC(kernel_execve)
+
+ ;;
+ ;; Special system calls
+ ;; return address is in B3
+ ;;
+ENTRY(sys_clone)
+ ADD .D1X SP,8,A4
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || MVKL .S1 sys_c6x_clone,A0
+ MVKH .S1 sys_c6x_clone,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 sys_c6x_clone
+ NOP 5
+#endif
+ENDPROC(sys_clone)
+
+ENTRY(sys_rt_sigreturn)
+ ADD .D1X SP,8,A4
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || MVKL .S1 do_rt_sigreturn,A0
+ MVKH .S1 do_rt_sigreturn,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 do_rt_sigreturn
+ NOP 5
+#endif
+ENDPROC(sys_rt_sigreturn)
+
+ENTRY(sys_execve)
+ ADDAW .D2 SP,2,B6 ; put regs addr in 4th parameter
+ ; & adjust regs stack addr
+ LDW .D2T2 *+SP(REGS_B4+8),B4
+
+ ;; c6x_execve(char *name, char **argv,
+ ;; char **envp, struct pt_regs *regs)
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || MVKL .S1 sys_c6x_execve,A0
+ MVKH .S1 sys_c6x_execve,A0
+ B .S2X A0
+#else
+ || B .S2 sys_c6x_execve
+#endif
+ STW .D2T2 B3,*SP--[2]
+ ADDKPC .S2 ret_from_c6x_execve,B3,3
+
+ret_from_c6x_execve:
+ LDW .D2T2 *++SP[2],B3
+ NOP 4
+ BNOP .S2 B3,5
+ENDPROC(sys_execve)
+
+ENTRY(sys_pread_c6x)
+ MV .D2X A8,B7
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || MVKL .S1 sys_pread64,A0
+ MVKH .S1 sys_pread64,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 sys_pread64
+ NOP 5
+#endif
+ENDPROC(sys_pread_c6x)
+
+ENTRY(sys_pwrite_c6x)
+ MV .D2X A8,B7
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || MVKL .S1 sys_pwrite64,A0
+ MVKH .S1 sys_pwrite64,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 sys_pwrite64
+ NOP 5
+#endif
+ENDPROC(sys_pwrite_c6x)
+
+;; On Entry
+;; A4 - path
+;; B4 - offset_lo (LE), offset_hi (BE)
+;; A6 - offset_lo (BE), offset_hi (LE)
+ENTRY(sys_truncate64_c6x)
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ MV .S2 B4,B5
+ MV .D2X A6,B4
+#else
+ MV .D2X A6,B5
+#endif
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || MVKL .S1 sys_truncate64,A0
+ MVKH .S1 sys_truncate64,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 sys_truncate64
+ NOP 5
+#endif
+ENDPROC(sys_truncate64_c6x)
+
+;; On Entry
+;; A4 - fd
+;; B4 - offset_lo (LE), offset_hi (BE)
+;; A6 - offset_lo (BE), offset_hi (LE)
+ENTRY(sys_ftruncate64_c6x)
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ MV .S2 B4,B5
+ MV .D2X A6,B4
+#else
+ MV .D2X A6,B5
+#endif
+#ifdef CONFIG_C6X_BIG_KERNEL
+ || MVKL .S1 sys_ftruncate64,A0
+ MVKH .S1 sys_ftruncate64,A0
+ BNOP .S2X A0,5
+#else
+ || B .S2 sys_ftruncate64
+ NOP 5
+#endif
+ENDPROC(sys_ftruncate64_c6x)
+
+#ifdef __ARCH_WANT_SYSCALL_OFF_T
+;; On Entry
+;; A4 - fd
+;; B4 - offset_lo (LE), offset_hi (BE)
+;; A6 - offset_lo (BE), offset_hi (LE)
+;; B6 - len
+;; A8 - advice
+ENTRY(sys_fadvise64_c6x)
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 sys_fadvise64,A0
+ MVKH .S1 sys_fadvise64,A0
+ BNOP .S2X A0,2
+#else
+ B .S2 sys_fadvise64
+ NOP 2
+#endif
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ MV .L2 B4,B5
+ || MV .D2X A6,B4
+#else
+ MV .D2X A6,B5
+#endif
+ MV .D1X B6,A6
+ MV .D2X A8,B6
+#endif
+ENDPROC(sys_fadvise64_c6x)
+
+;; On Entry
+;; A4 - fd
+;; B4 - offset_lo (LE), offset_hi (BE)
+;; A6 - offset_lo (BE), offset_hi (LE)
+;; B6 - len_lo (LE), len_hi (BE)
+;; A8 - len_lo (BE), len_hi (LE)
+;; B8 - advice
+ENTRY(sys_fadvise64_64_c6x)
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 sys_fadvise64_64,A0
+ MVKH .S1 sys_fadvise64_64,A0
+ BNOP .S2X A0,2
+#else
+ B .S2 sys_fadvise64_64
+ NOP 2
+#endif
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ MV .L2 B4,B5
+ || MV .D2X A6,B4
+ MV .L1 A8,A6
+ || MV .D1X B6,A7
+#else
+ MV .D2X A6,B5
+ MV .L1 A8,A7
+ || MV .D1X B6,A6
+#endif
+ MV .L2 B8,B6
+ENDPROC(sys_fadvise64_64_c6x)
+
+;; On Entry
+;; A4 - fd
+;; B4 - mode
+;; A6 - offset_hi
+;; B6 - offset_lo
+;; A8 - len_hi
+;; B8 - len_lo
+ENTRY(sys_fallocate_c6x)
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 sys_fallocate,A0
+ MVKH .S1 sys_fallocate,A0
+ BNOP .S2X A0,1
+#else
+ B .S2 sys_fallocate
+ NOP
+#endif
+ MV .D1 A6,A7
+ MV .D1X B6,A6
+ MV .D2X A8,B7
+ MV .D2 B8,B6
+ENDPROC(sys_fallocate_c6x)
+
+ ;; put this in .neardata for faster access when using DSBT mode
+ .section .neardata,"aw",@progbits
+ .global current_ksp
+ .hidden current_ksp
+current_ksp:
+ .word init_thread_union + THREAD_START_SP
diff --git a/arch/c6x/kernel/head.S b/arch/c6x/kernel/head.S
new file mode 100644
index 00000000000..133eab6edf6
--- /dev/null
+++ b/arch/c6x/kernel/head.S
@@ -0,0 +1,84 @@
+;
+; Port on Texas Instruments TMS320C6x architecture
+;
+; Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License version 2 as
+; published by the Free Software Foundation.
+;
+#include <linux/linkage.h>
+#include <linux/of_fdt.h>
+#include <asm/asm-offsets.h>
+
+ __HEAD
+ENTRY(_c_int00)
+ ;; Save magic and pointer
+ MV .S1 A4,A10
+ MV .S2 B4,B10
+ MVKL .S2 __bss_start,B5
+ MVKH .S2 __bss_start,B5
+ MVKL .S2 __bss_stop,B6
+ MVKH .S2 __bss_stop,B6
+ SUB .L2 B6,B5,B6 ; bss size
+
+ ;; Set the stack pointer
+ MVKL .S2 current_ksp,B0
+ MVKH .S2 current_ksp,B0
+ LDW .D2T2 *B0,B15
+
+ ;; clear bss
+ SHR .S2 B6,3,B0 ; number of dwords to clear
+ ZERO .L2 B13
+ ZERO .L2 B12
+bss_loop:
+ BDEC .S2 bss_loop,B0
+ NOP 3
+ CMPLT .L2 B0,0,B1
+ [!B1] STDW .D2T2 B13:B12,*B5++[1]
+
+ NOP 4
+ AND .D2 ~7,B15,B15
+
+ ;; Clear GIE and PGIE
+ MVC .S2 CSR,B2
+ CLR .S2 B2,0,1,B2
+ MVC .S2 B2,CSR
+ MVC .S2 TSR,B2
+ CLR .S2 B2,0,1,B2
+ MVC .S2 B2,TSR
+ MVC .S2 ITSR,B2
+ CLR .S2 B2,0,1,B2
+ MVC .S2 B2,ITSR
+ MVC .S2 NTSR,B2
+ CLR .S2 B2,0,1,B2
+ MVC .S2 B2,NTSR
+
+ ;; pass DTB pointer to machine_init (or zero if none)
+ MVKL .S1 OF_DT_HEADER,A0
+ MVKH .S1 OF_DT_HEADER,A0
+ CMPEQ .L1 A10,A0,A0
+ [A0] MV .S1X B10,A4
+ [!A0] MVK .S1 0,A4
+
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 machine_init,A0
+ MVKH .S1 machine_init,A0
+ B .S2X A0
+ ADDKPC .S2 0f,B3,4
+0:
+#else
+ CALLP .S2 machine_init,B3
+#endif
+
+ ;; Jump to Linux init
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 start_kernel,A0
+ MVKH .S1 start_kernel,A0
+ B .S2X A0
+#else
+ B .S2 start_kernel
+#endif
+ NOP 5
+L1: BNOP .S2 L1,5
diff --git a/arch/c6x/kernel/irq.c b/arch/c6x/kernel/irq.c
new file mode 100644
index 00000000000..0929e4b2b24
--- /dev/null
+++ b/arch/c6x/kernel/irq.c
@@ -0,0 +1,728 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ *
+ * This borrows heavily from powerpc version, which is:
+ *
+ * Derived from arch/i386/kernel/irq.c
+ * Copyright (C) 1992 Linus Torvalds
+ * Adapted from arch/i386 by Gary Thomas
+ * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ * Updated and modified by Cort Dougan <cort@fsmlabs.com>
+ * Copyright (C) 1996-2001 Cort Dougan
+ * Adapted for Power Macintosh by Paul Mackerras
+ * Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/slab.h>
+#include <linux/seq_file.h>
+#include <linux/radix-tree.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+
+#include <asm/megamod-pic.h>
+
+unsigned long irq_err_count;
+
+static DEFINE_RAW_SPINLOCK(core_irq_lock);
+
+static void mask_core_irq(struct irq_data *data)
+{
+ unsigned int prio = data->irq;
+
+ BUG_ON(prio < 4 || prio >= NR_PRIORITY_IRQS);
+
+ raw_spin_lock(&core_irq_lock);
+ and_creg(IER, ~(1 << prio));
+ raw_spin_unlock(&core_irq_lock);
+}
+
+static void unmask_core_irq(struct irq_data *data)
+{
+ unsigned int prio = data->irq;
+
+ raw_spin_lock(&core_irq_lock);
+ or_creg(IER, 1 << prio);
+ raw_spin_unlock(&core_irq_lock);
+}
+
+static struct irq_chip core_chip = {
+ .name = "core",
+ .irq_mask = mask_core_irq,
+ .irq_unmask = unmask_core_irq,
+};
+
+asmlinkage void c6x_do_IRQ(unsigned int prio, struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+
+ irq_enter();
+
+ BUG_ON(prio < 4 || prio >= NR_PRIORITY_IRQS);
+
+ generic_handle_irq(prio);
+
+ irq_exit();
+
+ set_irq_regs(old_regs);
+}
+
+static struct irq_host *core_host;
+
+static int core_host_map(struct irq_host *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ if (hw < 4 || hw >= NR_PRIORITY_IRQS)
+ return -EINVAL;
+
+ irq_set_status_flags(virq, IRQ_LEVEL);
+ irq_set_chip_and_handler(virq, &core_chip, handle_level_irq);
+ return 0;
+}
+
+static struct irq_host_ops core_host_ops = {
+ .map = core_host_map,
+};
+
+void __init init_IRQ(void)
+{
+ struct device_node *np;
+
+ /* Mask all priority IRQs */
+ and_creg(IER, ~0xfff0);
+
+ np = of_find_compatible_node(NULL, NULL, "ti,c64x+core-pic");
+ if (np != NULL) {
+ /* create the core host */
+ core_host = irq_alloc_host(np, IRQ_HOST_MAP_PRIORITY, 0,
+ &core_host_ops, 0);
+ if (core_host)
+ irq_set_default_host(core_host);
+ of_node_put(np);
+ }
+
+ printk(KERN_INFO "Core interrupt controller initialized\n");
+
+ /* now we're ready for other SoC controllers */
+ megamod_pic_init();
+
+ /* Clear all general IRQ flags */
+ set_creg(ICR, 0xfff0);
+}
+
+void ack_bad_irq(int irq)
+{
+ printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq);
+ irq_err_count++;
+}
+
+int arch_show_interrupts(struct seq_file *p, int prec)
+{
+ seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count);
+ return 0;
+}
+
+/*
+ * IRQ controller and virtual interrupts
+ */
+
+/* The main irq map itself is an array of NR_IRQ entries containing the
+ * associate host and irq number. An entry with a host of NULL is free.
+ * An entry can be allocated if it's free, the allocator always then sets
+ * hwirq first to the host's invalid irq number and then fills ops.
+ */
+struct irq_map_entry {
+ irq_hw_number_t hwirq;
+ struct irq_host *host;
+};
+
+static LIST_HEAD(irq_hosts);
+static DEFINE_RAW_SPINLOCK(irq_big_lock);
+static DEFINE_MUTEX(revmap_trees_mutex);
+static struct irq_map_entry irq_map[NR_IRQS];
+static unsigned int irq_virq_count = NR_IRQS;
+static struct irq_host *irq_default_host;
+
+irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
+{
+ return irq_map[d->irq].hwirq;
+}
+EXPORT_SYMBOL_GPL(irqd_to_hwirq);
+
+irq_hw_number_t virq_to_hw(unsigned int virq)
+{
+ return irq_map[virq].hwirq;
+}
+EXPORT_SYMBOL_GPL(virq_to_hw);
+
+bool virq_is_host(unsigned int virq, struct irq_host *host)
+{
+ return irq_map[virq].host == host;
+}
+EXPORT_SYMBOL_GPL(virq_is_host);
+
+static int default_irq_host_match(struct irq_host *h, struct device_node *np)
+{
+ return h->of_node != NULL && h->of_node == np;
+}
+
+struct irq_host *irq_alloc_host(struct device_node *of_node,
+ unsigned int revmap_type,
+ unsigned int revmap_arg,
+ struct irq_host_ops *ops,
+ irq_hw_number_t inval_irq)
+{
+ struct irq_host *host;
+ unsigned int size = sizeof(struct irq_host);
+ unsigned int i;
+ unsigned int *rmap;
+ unsigned long flags;
+
+ /* Allocate structure and revmap table if using linear mapping */
+ if (revmap_type == IRQ_HOST_MAP_LINEAR)
+ size += revmap_arg * sizeof(unsigned int);
+ host = kzalloc(size, GFP_KERNEL);
+ if (host == NULL)
+ return NULL;
+
+ /* Fill structure */
+ host->revmap_type = revmap_type;
+ host->inval_irq = inval_irq;
+ host->ops = ops;
+ host->of_node = of_node_get(of_node);
+
+ if (host->ops->match == NULL)
+ host->ops->match = default_irq_host_match;
+
+ raw_spin_lock_irqsave(&irq_big_lock, flags);
+
+ /* Check for the priority controller. */
+ if (revmap_type == IRQ_HOST_MAP_PRIORITY) {
+ if (irq_map[0].host != NULL) {
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
+ of_node_put(host->of_node);
+ kfree(host);
+ return NULL;
+ }
+ irq_map[0].host = host;
+ }
+
+ list_add(&host->link, &irq_hosts);
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
+
+ /* Additional setups per revmap type */
+ switch (revmap_type) {
+ case IRQ_HOST_MAP_PRIORITY:
+ /* 0 is always the invalid number for priority */
+ host->inval_irq = 0;
+ /* setup us as the host for all priority interrupts */
+ for (i = 1; i < NR_PRIORITY_IRQS; i++) {
+ irq_map[i].hwirq = i;
+ smp_wmb();
+ irq_map[i].host = host;
+ smp_wmb();
+
+ ops->map(host, i, i);
+ }
+ break;
+ case IRQ_HOST_MAP_LINEAR:
+ rmap = (unsigned int *)(host + 1);
+ for (i = 0; i < revmap_arg; i++)
+ rmap[i] = NO_IRQ;
+ host->revmap_data.linear.size = revmap_arg;
+ smp_wmb();
+ host->revmap_data.linear.revmap = rmap;
+ break;
+ case IRQ_HOST_MAP_TREE:
+ INIT_RADIX_TREE(&host->revmap_data.tree, GFP_KERNEL);
+ break;
+ default:
+ break;
+ }
+
+ pr_debug("irq: Allocated host of type %d @0x%p\n", revmap_type, host);
+
+ return host;
+}
+
+struct irq_host *irq_find_host(struct device_node *node)
+{
+ struct irq_host *h, *found = NULL;
+ unsigned long flags;
+
+ /* We might want to match the legacy controller last since
+ * it might potentially be set to match all interrupts in
+ * the absence of a device node. This isn't a problem so far
+ * yet though...
+ */
+ raw_spin_lock_irqsave(&irq_big_lock, flags);
+ list_for_each_entry(h, &irq_hosts, link)
+ if (h->ops->match(h, node)) {
+ found = h;
+ break;
+ }
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
+ return found;
+}
+EXPORT_SYMBOL_GPL(irq_find_host);
+
+void irq_set_default_host(struct irq_host *host)
+{
+ pr_debug("irq: Default host set to @0x%p\n", host);
+
+ irq_default_host = host;
+}
+
+void irq_set_virq_count(unsigned int count)
+{
+ pr_debug("irq: Trying to set virq count to %d\n", count);
+
+ BUG_ON(count < NR_PRIORITY_IRQS);
+ if (count < NR_IRQS)
+ irq_virq_count = count;
+}
+
+static int irq_setup_virq(struct irq_host *host, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+ int res;
+
+ res = irq_alloc_desc_at(virq, 0);
+ if (res != virq) {
+ pr_debug("irq: -> allocating desc failed\n");
+ goto error;
+ }
+
+ /* map it */
+ smp_wmb();
+ irq_map[virq].hwirq = hwirq;
+ smp_mb();
+
+ if (host->ops->map(host, virq, hwirq)) {
+ pr_debug("irq: -> mapping failed, freeing\n");
+ goto errdesc;
+ }
+
+ irq_clear_status_flags(virq, IRQ_NOREQUEST);
+
+ return 0;
+
+errdesc:
+ irq_free_descs(virq, 1);
+error:
+ irq_free_virt(virq, 1);
+ return -1;
+}
+
+unsigned int irq_create_direct_mapping(struct irq_host *host)
+{
+ unsigned int virq;
+
+ if (host == NULL)
+ host = irq_default_host;
+
+ BUG_ON(host == NULL);
+ WARN_ON(host->revmap_type != IRQ_HOST_MAP_NOMAP);
+
+ virq = irq_alloc_virt(host, 1, 0);
+ if (virq == NO_IRQ) {
+ pr_debug("irq: create_direct virq allocation failed\n");
+ return NO_IRQ;
+ }
+
+ pr_debug("irq: create_direct obtained virq %d\n", virq);
+
+ if (irq_setup_virq(host, virq, virq))
+ return NO_IRQ;
+
+ return virq;
+}
+
+unsigned int irq_create_mapping(struct irq_host *host,
+ irq_hw_number_t hwirq)
+{
+ unsigned int virq, hint;
+
+ pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", host, hwirq);
+
+ /* Look for default host if nececssary */
+ if (host == NULL)
+ host = irq_default_host;
+ if (host == NULL) {
+ printk(KERN_WARNING "irq_create_mapping called for"
+ " NULL host, hwirq=%lx\n", hwirq);
+ WARN_ON(1);
+ return NO_IRQ;
+ }
+ pr_debug("irq: -> using host @%p\n", host);
+
+ /* Check if mapping already exists */
+ virq = irq_find_mapping(host, hwirq);
+ if (virq != NO_IRQ) {
+ pr_debug("irq: -> existing mapping on virq %d\n", virq);
+ return virq;
+ }
+
+ /* Allocate a virtual interrupt number */
+ hint = hwirq % irq_virq_count;
+ virq = irq_alloc_virt(host, 1, hint);
+ if (virq == NO_IRQ) {
+ pr_debug("irq: -> virq allocation failed\n");
+ return NO_IRQ;
+ }
+
+ if (irq_setup_virq(host, virq, hwirq))
+ return NO_IRQ;
+
+ pr_debug("irq: irq %lu on host %s mapped to virtual irq %u\n",
+ hwirq, host->of_node ? host->of_node->full_name : "null", virq);
+
+ return virq;
+}
+EXPORT_SYMBOL_GPL(irq_create_mapping);
+
+unsigned int irq_create_of_mapping(struct device_node *controller,
+ const u32 *intspec, unsigned int intsize)
+{
+ struct irq_host *host;
+ irq_hw_number_t hwirq;
+ unsigned int type = IRQ_TYPE_NONE;
+ unsigned int virq;
+
+ if (controller == NULL)
+ host = irq_default_host;
+ else
+ host = irq_find_host(controller);
+ if (host == NULL) {
+ printk(KERN_WARNING "irq: no irq host found for %s !\n",
+ controller->full_name);
+ return NO_IRQ;
+ }
+
+ /* If host has no translation, then we assume interrupt line */
+ if (host->ops->xlate == NULL)
+ hwirq = intspec[0];
+ else {
+ if (host->ops->xlate(host, controller, intspec, intsize,
+ &hwirq, &type))
+ return NO_IRQ;
+ }
+
+ /* Create mapping */
+ virq = irq_create_mapping(host, hwirq);
+ if (virq == NO_IRQ)
+ return virq;
+
+ /* Set type if specified and different than the current one */
+ if (type != IRQ_TYPE_NONE &&
+ type != (irqd_get_trigger_type(irq_get_irq_data(virq))))
+ irq_set_irq_type(virq, type);
+ return virq;
+}
+EXPORT_SYMBOL_GPL(irq_create_of_mapping);
+
+void irq_dispose_mapping(unsigned int virq)
+{
+ struct irq_host *host;
+ irq_hw_number_t hwirq;
+
+ if (virq == NO_IRQ)
+ return;
+
+ /* Never unmap priority interrupts */
+ if (virq < NR_PRIORITY_IRQS)
+ return;
+
+ host = irq_map[virq].host;
+ if (WARN_ON(host == NULL))
+ return;
+
+ irq_set_status_flags(virq, IRQ_NOREQUEST);
+
+ /* remove chip and handler */
+ irq_set_chip_and_handler(virq, NULL, NULL);
+
+ /* Make sure it's completed */
+ synchronize_irq(virq);
+
+ /* Tell the PIC about it */
+ if (host->ops->unmap)
+ host->ops->unmap(host, virq);
+ smp_mb();
+
+ /* Clear reverse map */
+ hwirq = irq_map[virq].hwirq;
+ switch (host->revmap_type) {
+ case IRQ_HOST_MAP_LINEAR:
+ if (hwirq < host->revmap_data.linear.size)
+ host->revmap_data.linear.revmap[hwirq] = NO_IRQ;
+ break;
+ case IRQ_HOST_MAP_TREE:
+ mutex_lock(&revmap_trees_mutex);
+ radix_tree_delete(&host->revmap_data.tree, hwirq);
+ mutex_unlock(&revmap_trees_mutex);
+ break;
+ }
+
+ /* Destroy map */
+ smp_mb();
+ irq_map[virq].hwirq = host->inval_irq;
+
+ irq_free_descs(virq, 1);
+ /* Free it */
+ irq_free_virt(virq, 1);
+}
+EXPORT_SYMBOL_GPL(irq_dispose_mapping);
+
+unsigned int irq_find_mapping(struct irq_host *host,
+ irq_hw_number_t hwirq)
+{
+ unsigned int i;
+ unsigned int hint = hwirq % irq_virq_count;
+
+ /* Look for default host if nececssary */
+ if (host == NULL)
+ host = irq_default_host;
+ if (host == NULL)
+ return NO_IRQ;
+
+ /* Slow path does a linear search of the map */
+ i = hint;
+ do {
+ if (irq_map[i].host == host &&
+ irq_map[i].hwirq == hwirq)
+ return i;
+ i++;
+ if (i >= irq_virq_count)
+ i = 4;
+ } while (i != hint);
+ return NO_IRQ;
+}
+EXPORT_SYMBOL_GPL(irq_find_mapping);
+
+unsigned int irq_radix_revmap_lookup(struct irq_host *host,
+ irq_hw_number_t hwirq)
+{
+ struct irq_map_entry *ptr;
+ unsigned int virq;
+
+ if (WARN_ON_ONCE(host->revmap_type != IRQ_HOST_MAP_TREE))
+ return irq_find_mapping(host, hwirq);
+
+ /*
+ * The ptr returned references the static global irq_map.
+ * but freeing an irq can delete nodes along the path to
+ * do the lookup via call_rcu.
+ */
+ rcu_read_lock();
+ ptr = radix_tree_lookup(&host->revmap_data.tree, hwirq);
+ rcu_read_unlock();
+
+ /*
+ * If found in radix tree, then fine.
+ * Else fallback to linear lookup - this should not happen in practice
+ * as it means that we failed to insert the node in the radix tree.
+ */
+ if (ptr)
+ virq = ptr - irq_map;
+ else
+ virq = irq_find_mapping(host, hwirq);
+
+ return virq;
+}
+
+void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+ if (WARN_ON(host->revmap_type != IRQ_HOST_MAP_TREE))
+ return;
+
+ if (virq != NO_IRQ) {
+ mutex_lock(&revmap_trees_mutex);
+ radix_tree_insert(&host->revmap_data.tree, hwirq,
+ &irq_map[virq]);
+ mutex_unlock(&revmap_trees_mutex);
+ }
+}
+
+unsigned int irq_linear_revmap(struct irq_host *host,
+ irq_hw_number_t hwirq)
+{
+ unsigned int *revmap;
+
+ if (WARN_ON_ONCE(host->revmap_type != IRQ_HOST_MAP_LINEAR))
+ return irq_find_mapping(host, hwirq);
+
+ /* Check revmap bounds */
+ if (unlikely(hwirq >= host->revmap_data.linear.size))
+ return irq_find_mapping(host, hwirq);
+
+ /* Check if revmap was allocated */
+ revmap = host->revmap_data.linear.revmap;
+ if (unlikely(revmap == NULL))
+ return irq_find_mapping(host, hwirq);
+
+ /* Fill up revmap with slow path if no mapping found */
+ if (unlikely(revmap[hwirq] == NO_IRQ))
+ revmap[hwirq] = irq_find_mapping(host, hwirq);
+
+ return revmap[hwirq];
+}
+
+unsigned int irq_alloc_virt(struct irq_host *host,
+ unsigned int count,
+ unsigned int hint)
+{
+ unsigned long flags;
+ unsigned int i, j, found = NO_IRQ;
+
+ if (count == 0 || count > (irq_virq_count - NR_PRIORITY_IRQS))
+ return NO_IRQ;
+
+ raw_spin_lock_irqsave(&irq_big_lock, flags);
+
+ /* Use hint for 1 interrupt if any */
+ if (count == 1 && hint >= NR_PRIORITY_IRQS &&
+ hint < irq_virq_count && irq_map[hint].host == NULL) {
+ found = hint;
+ goto hint_found;
+ }
+
+ /* Look for count consecutive numbers in the allocatable
+ * (non-legacy) space
+ */
+ for (i = NR_PRIORITY_IRQS, j = 0; i < irq_virq_count; i++) {
+ if (irq_map[i].host != NULL)
+ j = 0;
+ else
+ j++;
+
+ if (j == count) {
+ found = i - count + 1;
+ break;
+ }
+ }
+ if (found == NO_IRQ) {
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
+ return NO_IRQ;
+ }
+ hint_found:
+ for (i = found; i < (found + count); i++) {
+ irq_map[i].hwirq = host->inval_irq;
+ smp_wmb();
+ irq_map[i].host = host;
+ }
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
+ return found;
+}
+
+void irq_free_virt(unsigned int virq, unsigned int count)
+{
+ unsigned long flags;
+ unsigned int i;
+
+ WARN_ON(virq < NR_PRIORITY_IRQS);
+ WARN_ON(count == 0 || (virq + count) > irq_virq_count);
+
+ if (virq < NR_PRIORITY_IRQS) {
+ if (virq + count < NR_PRIORITY_IRQS)
+ return;
+ count -= NR_PRIORITY_IRQS - virq;
+ virq = NR_PRIORITY_IRQS;
+ }
+
+ if (count > irq_virq_count || virq > irq_virq_count - count) {
+ if (virq > irq_virq_count)
+ return;
+ count = irq_virq_count - virq;
+ }
+
+ raw_spin_lock_irqsave(&irq_big_lock, flags);
+ for (i = virq; i < (virq + count); i++) {
+ struct irq_host *host;
+
+ host = irq_map[i].host;
+ irq_map[i].hwirq = host->inval_irq;
+ smp_wmb();
+ irq_map[i].host = NULL;
+ }
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
+}
+
+#ifdef CONFIG_VIRQ_DEBUG
+static int virq_debug_show(struct seq_file *m, void *private)
+{
+ unsigned long flags;
+ struct irq_desc *desc;
+ const char *p;
+ static const char none[] = "none";
+ void *data;
+ int i;
+
+ seq_printf(m, "%-5s %-7s %-15s %-18s %s\n", "virq", "hwirq",
+ "chip name", "chip data", "host name");
+
+ for (i = 1; i < nr_irqs; i++) {
+ desc = irq_to_desc(i);
+ if (!desc)
+ continue;
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+
+ if (desc->action && desc->action->handler) {
+ struct irq_chip *chip;
+
+ seq_printf(m, "%5d ", i);
+ seq_printf(m, "0x%05lx ", irq_map[i].hwirq);
+
+ chip = irq_desc_get_chip(desc);
+ if (chip && chip->name)
+ p = chip->name;
+ else
+ p = none;
+ seq_printf(m, "%-15s ", p);
+
+ data = irq_desc_get_chip_data(desc);
+ seq_printf(m, "0x%16p ", data);
+
+ if (irq_map[i].host && irq_map[i].host->of_node)
+ p = irq_map[i].host->of_node->full_name;
+ else
+ p = none;
+ seq_printf(m, "%s\n", p);
+ }
+
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+ }
+
+ return 0;
+}
+
+static int virq_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, virq_debug_show, inode->i_private);
+}
+
+static const struct file_operations virq_debug_fops = {
+ .open = virq_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init irq_debugfs_init(void)
+{
+ if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root,
+ NULL, &virq_debug_fops) == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+device_initcall(irq_debugfs_init);
+#endif /* CONFIG_VIRQ_DEBUG */
diff --git a/arch/c6x/kernel/module.c b/arch/c6x/kernel/module.c
new file mode 100644
index 00000000000..5fc03f18f56
--- /dev/null
+++ b/arch/c6x/kernel/module.c
@@ -0,0 +1,123 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2005, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Thomas Charleux (thomas.charleux@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/kernel.h>
+
+static inline int fixup_pcr(u32 *ip, Elf32_Addr dest, u32 maskbits, int shift)
+{
+ u32 opcode;
+ long ep = (long)ip & ~31;
+ long delta = ((long)dest - ep) >> 2;
+ long mask = (1 << maskbits) - 1;
+
+ if ((delta >> (maskbits - 1)) == 0 ||
+ (delta >> (maskbits - 1)) == -1) {
+ opcode = *ip;
+ opcode &= ~(mask << shift);
+ opcode |= ((delta & mask) << shift);
+ *ip = opcode;
+
+ pr_debug("REL PCR_S%d[%p] dest[%p] opcode[%08x]\n",
+ maskbits, ip, (void *)dest, opcode);
+
+ return 0;
+ }
+ pr_err("PCR_S%d reloc %p -> %p out of range!\n",
+ maskbits, ip, (void *)dest);
+
+ return -1;
+}
+
+/*
+ * apply a RELA relocation
+ */
+int apply_relocate_add(Elf32_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ Elf32_Rela *rel = (void *) sechdrs[relsec].sh_addr;
+ Elf_Sym *sym;
+ u32 *location, opcode;
+ unsigned int i;
+ Elf32_Addr v;
+ Elf_Addr offset = 0;
+
+ pr_debug("Applying relocate section %u to %u with offset 0x%x\n",
+ relsec, sechdrs[relsec].sh_info, offset);
+
+ for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+ /* This is where to make the change */
+ location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ + rel[i].r_offset - offset;
+
+ /* This is the symbol it is referring to. Note that all
+ undefined symbols have been resolved. */
+ sym = (Elf_Sym *)sechdrs[symindex].sh_addr
+ + ELF32_R_SYM(rel[i].r_info);
+
+ /* this is the adjustment to be made */
+ v = sym->st_value + rel[i].r_addend;
+
+ switch (ELF32_R_TYPE(rel[i].r_info)) {
+ case R_C6000_ABS32:
+ pr_debug("RELA ABS32: [%p] = 0x%x\n", location, v);
+ *location = v;
+ break;
+ case R_C6000_ABS16:
+ pr_debug("RELA ABS16: [%p] = 0x%x\n", location, v);
+ *(u16 *)location = v;
+ break;
+ case R_C6000_ABS8:
+ pr_debug("RELA ABS8: [%p] = 0x%x\n", location, v);
+ *(u8 *)location = v;
+ break;
+ case R_C6000_ABS_L16:
+ opcode = *location;
+ opcode &= ~0x7fff80;
+ opcode |= ((v & 0xffff) << 7);
+ pr_debug("RELA ABS_L16[%p] v[0x%x] opcode[0x%x]\n",
+ location, v, opcode);
+ *location = opcode;
+ break;
+ case R_C6000_ABS_H16:
+ opcode = *location;
+ opcode &= ~0x7fff80;
+ opcode |= ((v >> 9) & 0x7fff80);
+ pr_debug("RELA ABS_H16[%p] v[0x%x] opcode[0x%x]\n",
+ location, v, opcode);
+ *location = opcode;
+ break;
+ case R_C6000_PCR_S21:
+ if (fixup_pcr(location, v, 21, 7))
+ return -ENOEXEC;
+ break;
+ case R_C6000_PCR_S12:
+ if (fixup_pcr(location, v, 12, 16))
+ return -ENOEXEC;
+ break;
+ case R_C6000_PCR_S10:
+ if (fixup_pcr(location, v, 10, 13))
+ return -ENOEXEC;
+ break;
+ default:
+ pr_err("module %s: Unknown RELA relocation: %u\n",
+ me->name, ELF32_R_TYPE(rel[i].r_info));
+ return -ENOEXEC;
+ }
+ }
+
+ return 0;
+}
diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c
new file mode 100644
index 00000000000..7ca8c41b03c
--- /dev/null
+++ b/arch/c6x/kernel/process.c
@@ -0,0 +1,265 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/module.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/init_task.h>
+#include <linux/tick.h>
+#include <linux/mqueue.h>
+#include <linux/syscalls.h>
+#include <linux/reboot.h>
+
+#include <asm/syscalls.h>
+
+/* hooks for board specific support */
+void (*c6x_restart)(void);
+void (*c6x_halt)(void);
+
+extern asmlinkage void ret_from_fork(void);
+
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+
+/*
+ * Initial thread structure.
+ */
+union thread_union init_thread_union __init_task_data = {
+ INIT_THREAD_INFO(init_task)
+};
+
+/*
+ * Initial task structure.
+ */
+struct task_struct init_task = INIT_TASK(init_task);
+EXPORT_SYMBOL(init_task);
+
+/*
+ * power off function, if any
+ */
+void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
+
+static void c6x_idle(void)
+{
+ unsigned long tmp;
+
+ /*
+ * Put local_irq_enable and idle in same execute packet
+ * to make them atomic and avoid race to idle with
+ * interrupts enabled.
+ */
+ asm volatile (" mvc .s2 CSR,%0\n"
+ " or .d2 1,%0,%0\n"
+ " mvc .s2 %0,CSR\n"
+ "|| idle\n"
+ : "=b"(tmp));
+}
+
+/*
+ * The idle loop for C64x
+ */
+void cpu_idle(void)
+{
+ /* endless idle loop with no priority at all */
+ while (1) {
+ tick_nohz_idle_enter();
+ rcu_idle_enter();
+ while (1) {
+ local_irq_disable();
+ if (need_resched()) {
+ local_irq_enable();
+ break;
+ }
+ c6x_idle(); /* enables local irqs */
+ }
+ rcu_idle_exit();
+ tick_nohz_idle_exit();
+
+ preempt_enable_no_resched();
+ schedule();
+ preempt_disable();
+ }
+}
+
+static void halt_loop(void)
+{
+ printk(KERN_EMERG "System Halted, OK to turn off power\n");
+ local_irq_disable();
+ while (1)
+ asm volatile("idle\n");
+}
+
+void machine_restart(char *__unused)
+{
+ if (c6x_restart)
+ c6x_restart();
+ halt_loop();
+}
+
+void machine_halt(void)
+{
+ if (c6x_halt)
+ c6x_halt();
+ halt_loop();
+}
+
+void machine_power_off(void)
+{
+ if (pm_power_off)
+ pm_power_off();
+ halt_loop();
+}
+
+static void kernel_thread_helper(int dummy, void *arg, int (*fn)(void *))
+{
+ do_exit(fn(arg));
+}
+
+/*
+ * Create a kernel thread
+ */
+int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
+{
+ struct pt_regs regs;
+
+ /*
+ * copy_thread sets a4 to zero (child return from fork)
+ * so we can't just set things up to directly return to
+ * fn.
+ */
+ memset(&regs, 0, sizeof(regs));
+ regs.b4 = (unsigned long) arg;
+ regs.a6 = (unsigned long) fn;
+ regs.pc = (unsigned long) kernel_thread_helper;
+ local_save_flags(regs.csr);
+ regs.csr |= 1;
+ regs.tsr = 5; /* Set GEE and GIE in TSR */
+
+ /* Ok, create the new process.. */
+ return do_fork(flags | CLONE_VM | CLONE_UNTRACED, -1, &regs,
+ 0, NULL, NULL);
+}
+EXPORT_SYMBOL(kernel_thread);
+
+void flush_thread(void)
+{
+}
+
+void exit_thread(void)
+{
+}
+
+SYSCALL_DEFINE1(c6x_clone, struct pt_regs *, regs)
+{
+ unsigned long clone_flags;
+ unsigned long newsp;
+
+ /* syscall puts clone_flags in A4 and usp in B4 */
+ clone_flags = regs->orig_a4;
+ if (regs->b4)
+ newsp = regs->b4;
+ else
+ newsp = regs->sp;
+
+ return do_fork(clone_flags, newsp, regs, 0, (int __user *)regs->a6,
+ (int __user *)regs->b6);
+}
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ */
+void start_thread(struct pt_regs *regs, unsigned int pc, unsigned long usp)
+{
+ /*
+ * The binfmt loader will setup a "full" stack, but the C6X
+ * operates an "empty" stack. So we adjust the usp so that
+ * argc doesn't get destroyed if an interrupt is taken before
+ * it is read from the stack.
+ *
+ * NB: Library startup code needs to match this.
+ */
+ usp -= 8;
+
+ set_fs(USER_DS);
+ regs->pc = pc;
+ regs->sp = usp;
+ regs->tsr |= 0x40; /* set user mode */
+ current->thread.usp = usp;
+}
+
+/*
+ * Copy a new thread context in its stack.
+ */
+int copy_thread(unsigned long clone_flags, unsigned long usp,
+ unsigned long ustk_size,
+ struct task_struct *p, struct pt_regs *regs)
+{
+ struct pt_regs *childregs;
+
+ childregs = task_pt_regs(p);
+
+ *childregs = *regs;
+ childregs->a4 = 0;
+
+ if (usp == -1)
+ /* case of __kernel_thread: we return to supervisor space */
+ childregs->sp = (unsigned long)(childregs + 1);
+ else
+ /* Otherwise use the given stack */
+ childregs->sp = usp;
+
+ /* Set usp/ksp */
+ p->thread.usp = childregs->sp;
+ /* switch_to uses stack to save/restore 14 callee-saved regs */
+ thread_saved_ksp(p) = (unsigned long)childregs - 8;
+ p->thread.pc = (unsigned int) ret_from_fork;
+ p->thread.wchan = (unsigned long) ret_from_fork;
+#ifdef __DSBT__
+ {
+ unsigned long dp;
+
+ asm volatile ("mv .S2 b14,%0\n" : "=b"(dp));
+
+ thread_saved_dp(p) = dp;
+ if (usp == -1)
+ childregs->dp = dp;
+ }
+#endif
+ return 0;
+}
+
+/*
+ * c6x_execve() executes a new program.
+ */
+SYSCALL_DEFINE4(c6x_execve, const char __user *, name,
+ const char __user *const __user *, argv,
+ const char __user *const __user *, envp,
+ struct pt_regs *, regs)
+{
+ int error;
+ char *filename;
+
+ filename = getname(name);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename))
+ goto out;
+
+ error = do_execve(filename, argv, envp, regs);
+ putname(filename);
+out:
+ return error;
+}
+
+unsigned long get_wchan(struct task_struct *p)
+{
+ return p->thread.wchan;
+}
diff --git a/arch/c6x/kernel/ptrace.c b/arch/c6x/kernel/ptrace.c
new file mode 100644
index 00000000000..3c494e84444
--- /dev/null
+++ b/arch/c6x/kernel/ptrace.c
@@ -0,0 +1,187 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * Updated for 2.6.34: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/ptrace.h>
+#include <linux/tracehook.h>
+#include <linux/regset.h>
+#include <linux/elf.h>
+
+#include <asm/cacheflush.h>
+
+#define PT_REG_SIZE (sizeof(struct pt_regs))
+
+/*
+ * Called by kernel/ptrace.c when detaching.
+ */
+void ptrace_disable(struct task_struct *child)
+{
+ /* nothing to do */
+}
+
+/*
+ * Get a register number from live pt_regs for the specified task.
+ */
+static inline long get_reg(struct task_struct *task, int regno)
+{
+ long *addr = (long *)task_pt_regs(task);
+
+ if (regno == PT_TSR || regno == PT_CSR)
+ return 0;
+
+ return addr[regno];
+}
+
+/*
+ * Write contents of register REGNO in task TASK.
+ */
+static inline int put_reg(struct task_struct *task,
+ int regno,
+ unsigned long data)
+{
+ unsigned long *addr = (unsigned long *)task_pt_regs(task);
+
+ if (regno != PT_TSR && regno != PT_CSR)
+ addr[regno] = data;
+
+ return 0;
+}
+
+/* regset get/set implementations */
+
+static int gpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ struct pt_regs *regs = task_pt_regs(target);
+
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+ regs,
+ 0, sizeof(*regs));
+}
+
+static int gpr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+ struct pt_regs *regs = task_pt_regs(target);
+
+ /* Don't copyin TSR or CSR */
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &regs,
+ 0, PT_TSR * sizeof(long));
+ if (ret)
+ return ret;
+
+ ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+ PT_TSR * sizeof(long),
+ (PT_TSR + 1) * sizeof(long));
+ if (ret)
+ return ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &regs,
+ (PT_TSR + 1) * sizeof(long),
+ PT_CSR * sizeof(long));
+ if (ret)
+ return ret;
+
+ ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+ PT_CSR * sizeof(long),
+ (PT_CSR + 1) * sizeof(long));
+ if (ret)
+ return ret;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+ &regs,
+ (PT_CSR + 1) * sizeof(long), -1);
+ return ret;
+}
+
+enum c6x_regset {
+ REGSET_GPR,
+};
+
+static const struct user_regset c6x_regsets[] = {
+ [REGSET_GPR] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = ELF_NGREG,
+ .size = sizeof(u32),
+ .align = sizeof(u32),
+ .get = gpr_get,
+ .set = gpr_set
+ },
+};
+
+static const struct user_regset_view user_c6x_native_view = {
+ .name = "tic6x",
+ .e_machine = EM_TI_C6000,
+ .regsets = c6x_regsets,
+ .n = ARRAY_SIZE(c6x_regsets),
+};
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+ return &user_c6x_native_view;
+}
+
+/*
+ * Perform ptrace request
+ */
+long arch_ptrace(struct task_struct *child, long request,
+ unsigned long addr, unsigned long data)
+{
+ int ret = 0;
+
+ switch (request) {
+ /*
+ * write the word at location addr.
+ */
+ case PTRACE_POKETEXT:
+ ret = generic_ptrace_pokedata(child, addr, data);
+ if (ret == 0 && request == PTRACE_POKETEXT)
+ flush_icache_range(addr, addr + 4);
+ break;
+ default:
+ ret = ptrace_request(child, request, addr, data);
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * handle tracing of system call entry
+ * - return the revised system call number or ULONG_MAX to cause ENOSYS
+ */
+asmlinkage unsigned long syscall_trace_entry(struct pt_regs *regs)
+{
+ if (tracehook_report_syscall_entry(regs))
+ /* tracing decided this syscall should not happen, so
+ * We'll return a bogus call number to get an ENOSYS
+ * error, but leave the original number in
+ * regs->orig_a4
+ */
+ return ULONG_MAX;
+
+ return regs->b0;
+}
+
+/*
+ * handle tracing of system call exit
+ */
+asmlinkage void syscall_trace_exit(struct pt_regs *regs)
+{
+ tracehook_report_syscall_exit(regs, 0);
+}
diff --git a/arch/c6x/kernel/setup.c b/arch/c6x/kernel/setup.c
new file mode 100644
index 00000000000..0c07921747f
--- /dev/null
+++ b/arch/c6x/kernel/setup.c
@@ -0,0 +1,510 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/dma-mapping.h>
+#include <linux/memblock.h>
+#include <linux/seq_file.h>
+#include <linux/bootmem.h>
+#include <linux/clkdev.h>
+#include <linux/initrd.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_fdt.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/cache.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/clk.h>
+#include <linux/cpu.h>
+#include <linux/fs.h>
+#include <linux/of.h>
+
+
+#include <asm/sections.h>
+#include <asm/div64.h>
+#include <asm/setup.h>
+#include <asm/dscr.h>
+#include <asm/clock.h>
+#include <asm/soc.h>
+
+static const char *c6x_soc_name;
+
+int c6x_num_cores;
+EXPORT_SYMBOL_GPL(c6x_num_cores);
+
+unsigned int c6x_silicon_rev;
+EXPORT_SYMBOL_GPL(c6x_silicon_rev);
+
+/*
+ * Device status register. This holds information
+ * about device configuration needed by some drivers.
+ */
+unsigned int c6x_devstat;
+EXPORT_SYMBOL_GPL(c6x_devstat);
+
+/*
+ * Some SoCs have fuse registers holding a unique MAC
+ * address. This is parsed out of the device tree with
+ * the resulting MAC being held here.
+ */
+unsigned char c6x_fuse_mac[6];
+
+unsigned long memory_start;
+unsigned long memory_end;
+
+unsigned long ram_start;
+unsigned long ram_end;
+
+/* Uncached memory for DMA consistent use (memdma=) */
+static unsigned long dma_start __initdata;
+static unsigned long dma_size __initdata;
+
+char c6x_command_line[COMMAND_LINE_SIZE];
+
+#if defined(CONFIG_CMDLINE_BOOL)
+static const char default_command_line[COMMAND_LINE_SIZE] __section(.cmdline) =
+ CONFIG_CMDLINE;
+#endif
+
+struct cpuinfo_c6x {
+ const char *cpu_name;
+ const char *cpu_voltage;
+ const char *mmu;
+ const char *fpu;
+ char *cpu_rev;
+ unsigned int core_id;
+ char __cpu_rev[5];
+};
+
+static DEFINE_PER_CPU(struct cpuinfo_c6x, cpu_data);
+
+unsigned int ticks_per_ns_scaled;
+EXPORT_SYMBOL(ticks_per_ns_scaled);
+
+unsigned int c6x_core_freq;
+
+static void __init get_cpuinfo(void)
+{
+ unsigned cpu_id, rev_id, csr;
+ struct clk *coreclk = clk_get_sys(NULL, "core");
+ unsigned long core_khz;
+ u64 tmp;
+ struct cpuinfo_c6x *p;
+ struct device_node *node, *np;
+
+ p = &per_cpu(cpu_data, smp_processor_id());
+
+ if (!IS_ERR(coreclk))
+ c6x_core_freq = clk_get_rate(coreclk);
+ else {
+ printk(KERN_WARNING
+ "Cannot find core clock frequency. Using 700MHz\n");
+ c6x_core_freq = 700000000;
+ }
+
+ core_khz = c6x_core_freq / 1000;
+
+ tmp = (uint64_t)core_khz << C6X_NDELAY_SCALE;
+ do_div(tmp, 1000000);
+ ticks_per_ns_scaled = tmp;
+
+ csr = get_creg(CSR);
+ cpu_id = csr >> 24;
+ rev_id = (csr >> 16) & 0xff;
+
+ p->mmu = "none";
+ p->fpu = "none";
+ p->cpu_voltage = "unknown";
+
+ switch (cpu_id) {
+ case 0:
+ p->cpu_name = "C67x";
+ p->fpu = "yes";
+ break;
+ case 2:
+ p->cpu_name = "C62x";
+ break;
+ case 8:
+ p->cpu_name = "C64x";
+ break;
+ case 12:
+ p->cpu_name = "C64x";
+ break;
+ case 16:
+ p->cpu_name = "C64x+";
+ p->cpu_voltage = "1.2";
+ break;
+ default:
+ p->cpu_name = "unknown";
+ break;
+ }
+
+ if (cpu_id < 16) {
+ switch (rev_id) {
+ case 0x1:
+ if (cpu_id > 8) {
+ p->cpu_rev = "DM640/DM641/DM642/DM643";
+ p->cpu_voltage = "1.2 - 1.4";
+ } else {
+ p->cpu_rev = "C6201";
+ p->cpu_voltage = "2.5";
+ }
+ break;
+ case 0x2:
+ p->cpu_rev = "C6201B/C6202/C6211";
+ p->cpu_voltage = "1.8";
+ break;
+ case 0x3:
+ p->cpu_rev = "C6202B/C6203/C6204/C6205";
+ p->cpu_voltage = "1.5";
+ break;
+ case 0x201:
+ p->cpu_rev = "C6701 revision 0 (early CPU)";
+ p->cpu_voltage = "1.8";
+ break;
+ case 0x202:
+ p->cpu_rev = "C6701/C6711/C6712";
+ p->cpu_voltage = "1.8";
+ break;
+ case 0x801:
+ p->cpu_rev = "C64x";
+ p->cpu_voltage = "1.5";
+ break;
+ default:
+ p->cpu_rev = "unknown";
+ }
+ } else {
+ p->cpu_rev = p->__cpu_rev;
+ snprintf(p->__cpu_rev, sizeof(p->__cpu_rev), "0x%x", cpu_id);
+ }
+
+ p->core_id = get_coreid();
+
+ node = of_find_node_by_name(NULL, "cpus");
+ if (node) {
+ for_each_child_of_node(node, np)
+ if (!strcmp("cpu", np->name))
+ ++c6x_num_cores;
+ of_node_put(node);
+ }
+
+ node = of_find_node_by_name(NULL, "soc");
+ if (node) {
+ if (of_property_read_string(node, "model", &c6x_soc_name))
+ c6x_soc_name = "unknown";
+ of_node_put(node);
+ } else
+ c6x_soc_name = "unknown";
+
+ printk(KERN_INFO "CPU%d: %s rev %s, %s volts, %uMHz\n",
+ p->core_id, p->cpu_name, p->cpu_rev,
+ p->cpu_voltage, c6x_core_freq / 1000000);
+}
+
+/*
+ * Early parsing of the command line
+ */
+static u32 mem_size __initdata;
+
+/* "mem=" parsing. */
+static int __init early_mem(char *p)
+{
+ if (!p)
+ return -EINVAL;
+
+ mem_size = memparse(p, &p);
+ /* don't remove all of memory when handling "mem={invalid}" */
+ if (mem_size == 0)
+ return -EINVAL;
+
+ return 0;
+}
+early_param("mem", early_mem);
+
+/* "memdma=<size>[@<address>]" parsing. */
+static int __init early_memdma(char *p)
+{
+ if (!p)
+ return -EINVAL;
+
+ dma_size = memparse(p, &p);
+ if (*p == '@')
+ dma_start = memparse(p, &p);
+
+ return 0;
+}
+early_param("memdma", early_memdma);
+
+int __init c6x_add_memory(phys_addr_t start, unsigned long size)
+{
+ static int ram_found __initdata;
+
+ /* We only handle one bank (the one with PAGE_OFFSET) for now */
+ if (ram_found)
+ return -EINVAL;
+
+ if (start > PAGE_OFFSET || PAGE_OFFSET >= (start + size))
+ return 0;
+
+ ram_start = start;
+ ram_end = start + size;
+
+ ram_found = 1;
+ return 0;
+}
+
+/*
+ * Do early machine setup and device tree parsing. This is called very
+ * early on the boot process.
+ */
+notrace void __init machine_init(unsigned long dt_ptr)
+{
+ struct boot_param_header *dtb = __va(dt_ptr);
+ struct boot_param_header *fdt = (struct boot_param_header *)_fdt_start;
+
+ /* interrupts must be masked */
+ set_creg(IER, 2);
+
+ /*
+ * Set the Interrupt Service Table (IST) to the beginning of the
+ * vector table.
+ */
+ set_ist(_vectors_start);
+
+ lockdep_init();
+
+ /*
+ * dtb is passed in from bootloader.
+ * fdt is linked in blob.
+ */
+ if (dtb && dtb != fdt)
+ fdt = dtb;
+
+ /* Do some early initialization based on the flat device tree */
+ early_init_devtree(fdt);
+
+ /* parse_early_param needs a boot_command_line */
+ strlcpy(boot_command_line, c6x_command_line, COMMAND_LINE_SIZE);
+ parse_early_param();
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+ int bootmap_size;
+ struct memblock_region *reg;
+
+ printk(KERN_INFO "Initializing kernel\n");
+
+ /* Initialize command line */
+ *cmdline_p = c6x_command_line;
+
+ memory_end = ram_end;
+ memory_end &= ~(PAGE_SIZE - 1);
+
+ if (mem_size && (PAGE_OFFSET + PAGE_ALIGN(mem_size)) < memory_end)
+ memory_end = PAGE_OFFSET + PAGE_ALIGN(mem_size);
+
+ /* add block that this kernel can use */
+ memblock_add(PAGE_OFFSET, memory_end - PAGE_OFFSET);
+
+ /* reserve kernel text/data/bss */
+ memblock_reserve(PAGE_OFFSET,
+ PAGE_ALIGN((unsigned long)&_end - PAGE_OFFSET));
+
+ if (dma_size) {
+ /* align to cacheability granularity */
+ dma_size = CACHE_REGION_END(dma_size);
+
+ if (!dma_start)
+ dma_start = memory_end - dma_size;
+
+ /* align to cacheability granularity */
+ dma_start = CACHE_REGION_START(dma_start);
+
+ /* reserve DMA memory taken from kernel memory */
+ if (memblock_is_region_memory(dma_start, dma_size))
+ memblock_reserve(dma_start, dma_size);
+ }
+
+ memory_start = PAGE_ALIGN((unsigned int) &_end);
+
+ printk(KERN_INFO "Memory Start=%08lx, Memory End=%08lx\n",
+ memory_start, memory_end);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ /*
+ * Reserve initrd memory if in kernel memory.
+ */
+ if (initrd_start < initrd_end)
+ if (memblock_is_region_memory(initrd_start,
+ initrd_end - initrd_start))
+ memblock_reserve(initrd_start,
+ initrd_end - initrd_start);
+#endif
+
+ init_mm.start_code = (unsigned long) &_stext;
+ init_mm.end_code = (unsigned long) &_etext;
+ init_mm.end_data = memory_start;
+ init_mm.brk = memory_start;
+
+ /*
+ * Give all the memory to the bootmap allocator, tell it to put the
+ * boot mem_map at the start of memory
+ */
+ bootmap_size = init_bootmem_node(NODE_DATA(0),
+ memory_start >> PAGE_SHIFT,
+ PAGE_OFFSET >> PAGE_SHIFT,
+ memory_end >> PAGE_SHIFT);
+ memblock_reserve(memory_start, bootmap_size);
+
+ unflatten_device_tree();
+
+ c6x_cache_init();
+
+ /* Set the whole external memory as non-cacheable */
+ disable_caching(ram_start, ram_end - 1);
+
+ /* Set caching of external RAM used by Linux */
+ for_each_memblock(memory, reg)
+ enable_caching(CACHE_REGION_START(reg->base),
+ CACHE_REGION_START(reg->base + reg->size - 1));
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ /*
+ * Enable caching for initrd which falls outside kernel memory.
+ */
+ if (initrd_start < initrd_end) {
+ if (!memblock_is_region_memory(initrd_start,
+ initrd_end - initrd_start))
+ enable_caching(CACHE_REGION_START(initrd_start),
+ CACHE_REGION_START(initrd_end - 1));
+ }
+#endif
+
+ /*
+ * Disable caching for dma coherent memory taken from kernel memory.
+ */
+ if (dma_size && memblock_is_region_memory(dma_start, dma_size))
+ disable_caching(dma_start,
+ CACHE_REGION_START(dma_start + dma_size - 1));
+
+ /* Initialize the coherent memory allocator */
+ coherent_mem_init(dma_start, dma_size);
+
+ /*
+ * Free all memory as a starting point.
+ */
+ free_bootmem(PAGE_OFFSET, memory_end - PAGE_OFFSET);
+
+ /*
+ * Then reserve memory which is already being used.
+ */
+ for_each_memblock(reserved, reg) {
+ pr_debug("reserved - 0x%08x-0x%08x\n",
+ (u32) reg->base, (u32) reg->size);
+ reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
+ }
+
+ max_low_pfn = PFN_DOWN(memory_end);
+ min_low_pfn = PFN_UP(memory_start);
+ max_mapnr = max_low_pfn - min_low_pfn;
+
+ /* Get kmalloc into gear */
+ paging_init();
+
+ /*
+ * Probe for Device State Configuration Registers.
+ * We have to do this early in case timer needs to be enabled
+ * through DSCR.
+ */
+ dscr_probe();
+
+ /* We do this early for timer and core clock frequency */
+ c64x_setup_clocks();
+
+ /* Get CPU info */
+ get_cpuinfo();
+
+#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
+ conswitchp = &dummy_con;
+#endif
+}
+
+#define cpu_to_ptr(n) ((void *)((long)(n)+1))
+#define ptr_to_cpu(p) ((long)(p) - 1)
+
+static int show_cpuinfo(struct seq_file *m, void *v)
+{
+ int n = ptr_to_cpu(v);
+ struct cpuinfo_c6x *p = &per_cpu(cpu_data, n);
+
+ if (n == 0) {
+ seq_printf(m,
+ "soc\t\t: %s\n"
+ "soc revision\t: 0x%x\n"
+ "soc cores\t: %d\n",
+ c6x_soc_name, c6x_silicon_rev, c6x_num_cores);
+ }
+
+ seq_printf(m,
+ "\n"
+ "processor\t: %d\n"
+ "cpu\t\t: %s\n"
+ "core revision\t: %s\n"
+ "core voltage\t: %s\n"
+ "core id\t\t: %d\n"
+ "mmu\t\t: %s\n"
+ "fpu\t\t: %s\n"
+ "cpu MHz\t\t: %u\n"
+ "bogomips\t: %lu.%02lu\n\n",
+ n,
+ p->cpu_name, p->cpu_rev, p->cpu_voltage,
+ p->core_id, p->mmu, p->fpu,
+ (c6x_core_freq + 500000) / 1000000,
+ (loops_per_jiffy/(500000/HZ)),
+ (loops_per_jiffy/(5000/HZ))%100);
+
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ return *pos < nr_cpu_ids ? cpu_to_ptr(*pos) : NULL;
+}
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ ++*pos;
+ return NULL;
+}
+static void c_stop(struct seq_file *m, void *v)
+{
+}
+
+const struct seq_operations cpuinfo_op = {
+ c_start,
+ c_stop,
+ c_next,
+ show_cpuinfo
+};
+
+static struct cpu cpu_devices[NR_CPUS];
+
+static int __init topology_init(void)
+{
+ int i;
+
+ for_each_present_cpu(i)
+ register_cpu(&cpu_devices[i], i);
+
+ return 0;
+}
+
+subsys_initcall(topology_init);
diff --git a/arch/c6x/kernel/signal.c b/arch/c6x/kernel/signal.c
new file mode 100644
index 00000000000..304f675826e
--- /dev/null
+++ b/arch/c6x/kernel/signal.c
@@ -0,0 +1,377 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * Updated for 2.6.34: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/uaccess.h>
+#include <linux/syscalls.h>
+#include <linux/tracehook.h>
+
+#include <asm/ucontext.h>
+#include <asm/cacheflush.h>
+
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+/*
+ * Do a signal return, undo the signal stack.
+ */
+
+#define RETCODE_SIZE (9 << 2) /* 9 instructions = 36 bytes */
+
+struct rt_sigframe {
+ struct siginfo __user *pinfo;
+ void __user *puc;
+ struct siginfo info;
+ struct ucontext uc;
+ unsigned long retcode[RETCODE_SIZE >> 2];
+};
+
+static int restore_sigcontext(struct pt_regs *regs,
+ struct sigcontext __user *sc)
+{
+ int err = 0;
+
+ /* The access_ok check was done by caller, so use __get_user here */
+#define COPY(x) (err |= __get_user(regs->x, &sc->sc_##x))
+
+ COPY(sp); COPY(a4); COPY(b4); COPY(a6); COPY(b6); COPY(a8); COPY(b8);
+ COPY(a0); COPY(a1); COPY(a2); COPY(a3); COPY(a5); COPY(a7); COPY(a9);
+ COPY(b0); COPY(b1); COPY(b2); COPY(b3); COPY(b5); COPY(b7); COPY(b9);
+
+ COPY(a16); COPY(a17); COPY(a18); COPY(a19);
+ COPY(a20); COPY(a21); COPY(a22); COPY(a23);
+ COPY(a24); COPY(a25); COPY(a26); COPY(a27);
+ COPY(a28); COPY(a29); COPY(a30); COPY(a31);
+ COPY(b16); COPY(b17); COPY(b18); COPY(b19);
+ COPY(b20); COPY(b21); COPY(b22); COPY(b23);
+ COPY(b24); COPY(b25); COPY(b26); COPY(b27);
+ COPY(b28); COPY(b29); COPY(b30); COPY(b31);
+
+ COPY(csr); COPY(pc);
+
+#undef COPY
+
+ return err;
+}
+
+asmlinkage int do_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ sigset_t set;
+
+ /*
+ * Since we stacked the signal on a dword boundary,
+ * 'sp' should be dword aligned here. If it's
+ * not, then the user is trying to mess with us.
+ */
+ if (regs->sp & 7)
+ goto badframe;
+
+ frame = (struct rt_sigframe __user *) ((unsigned long) regs->sp + 8);
+
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
+ goto badframe;
+
+ return regs->a4;
+
+badframe:
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+static int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
+ unsigned long mask)
+{
+ int err = 0;
+
+ err |= __put_user(mask, &sc->sc_mask);
+
+ /* The access_ok check was done by caller, so use __put_user here */
+#define COPY(x) (err |= __put_user(regs->x, &sc->sc_##x))
+
+ COPY(sp); COPY(a4); COPY(b4); COPY(a6); COPY(b6); COPY(a8); COPY(b8);
+ COPY(a0); COPY(a1); COPY(a2); COPY(a3); COPY(a5); COPY(a7); COPY(a9);
+ COPY(b0); COPY(b1); COPY(b2); COPY(b3); COPY(b5); COPY(b7); COPY(b9);
+
+ COPY(a16); COPY(a17); COPY(a18); COPY(a19);
+ COPY(a20); COPY(a21); COPY(a22); COPY(a23);
+ COPY(a24); COPY(a25); COPY(a26); COPY(a27);
+ COPY(a28); COPY(a29); COPY(a30); COPY(a31);
+ COPY(b16); COPY(b17); COPY(b18); COPY(b19);
+ COPY(b20); COPY(b21); COPY(b22); COPY(b23);
+ COPY(b24); COPY(b25); COPY(b26); COPY(b27);
+ COPY(b28); COPY(b29); COPY(b30); COPY(b31);
+
+ COPY(csr); COPY(pc);
+
+#undef COPY
+
+ return err;
+}
+
+static inline void __user *get_sigframe(struct k_sigaction *ka,
+ struct pt_regs *regs,
+ unsigned long framesize)
+{
+ unsigned long sp = regs->sp;
+
+ /*
+ * This is the X/Open sanctioned signal stack switching.
+ */
+ if ((ka->sa.sa_flags & SA_ONSTACK) && sas_ss_flags(sp) == 0)
+ sp = current->sas_ss_sp + current->sas_ss_size;
+
+ /*
+ * No matter what happens, 'sp' must be dword
+ * aligned. Otherwise, nasty things will happen
+ */
+ return (void __user *)((sp - framesize) & ~7);
+}
+
+static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set, struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ unsigned long __user *retcode;
+ int err = 0;
+
+ frame = get_sigframe(ka, regs, sizeof(*frame));
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ goto segv_and_exit;
+
+ err |= __put_user(&frame->info, &frame->pinfo);
+ err |= __put_user(&frame->uc, &frame->puc);
+ err |= copy_siginfo_to_user(&frame->info, info);
+
+ /* Clear all the bits of the ucontext we don't use. */
+ err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
+
+ err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
+ err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+
+ /* Set up to return from userspace */
+ retcode = (unsigned long __user *) &frame->retcode;
+
+ /* The access_ok check was done above, so use __put_user here */
+#define COPY(x) (err |= __put_user(x, retcode++))
+
+ COPY(0x0000002AUL | (__NR_rt_sigreturn << 7));
+ /* MVK __NR_rt_sigreturn,B0 */
+ COPY(0x10000000UL); /* SWE */
+ COPY(0x00006000UL); /* NOP 4 */
+ COPY(0x00006000UL); /* NOP 4 */
+ COPY(0x00006000UL); /* NOP 4 */
+ COPY(0x00006000UL); /* NOP 4 */
+ COPY(0x00006000UL); /* NOP 4 */
+ COPY(0x00006000UL); /* NOP 4 */
+ COPY(0x00006000UL); /* NOP 4 */
+
+#undef COPY
+
+ if (err)
+ goto segv_and_exit;
+
+ flush_icache_range((unsigned long) &frame->retcode,
+ (unsigned long) &frame->retcode + RETCODE_SIZE);
+
+ retcode = (unsigned long __user *) &frame->retcode;
+
+ /* Change user context to branch to signal handler */
+ regs->sp = (unsigned long) frame - 8;
+ regs->b3 = (unsigned long) retcode;
+ regs->pc = (unsigned long) ka->sa.sa_handler;
+
+ /* Give the signal number to the handler */
+ regs->a4 = signr;
+
+ /*
+ * For realtime signals we must also set the second and third
+ * arguments for the signal handler.
+ * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
+ */
+ regs->b4 = (unsigned long)&frame->info;
+ regs->a6 = (unsigned long)&frame->uc;
+
+ return 0;
+
+segv_and_exit:
+ force_sigsegv(signr, current);
+ return -EFAULT;
+}
+
+static inline void
+handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
+{
+ switch (regs->a4) {
+ case -ERESTARTNOHAND:
+ if (!has_handler)
+ goto do_restart;
+ regs->a4 = -EINTR;
+ break;
+
+ case -ERESTARTSYS:
+ if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
+ regs->a4 = -EINTR;
+ break;
+ }
+ /* fallthrough */
+ case -ERESTARTNOINTR:
+do_restart:
+ regs->a4 = regs->orig_a4;
+ regs->pc -= 4;
+ break;
+ }
+}
+
+/*
+ * handle the actual delivery of a signal to userspace
+ */
+static int handle_signal(int sig,
+ siginfo_t *info, struct k_sigaction *ka,
+ sigset_t *oldset, struct pt_regs *regs,
+ int syscall)
+{
+ int ret;
+
+ /* Are we from a system call? */
+ if (syscall) {
+ /* If so, check system call restarting.. */
+ switch (regs->a4) {
+ case -ERESTART_RESTARTBLOCK:
+ case -ERESTARTNOHAND:
+ regs->a4 = -EINTR;
+ break;
+
+ case -ERESTARTSYS:
+ if (!(ka->sa.sa_flags & SA_RESTART)) {
+ regs->a4 = -EINTR;
+ break;
+ }
+
+ /* fallthrough */
+ case -ERESTARTNOINTR:
+ regs->a4 = regs->orig_a4;
+ regs->pc -= 4;
+ }
+ }
+
+ /* Set up the stack frame */
+ ret = setup_rt_frame(sig, ka, info, oldset, regs);
+ if (ret == 0) {
+ spin_lock_irq(&current->sighand->siglock);
+ sigorsets(&current->blocked, &current->blocked,
+ &ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
+ sigaddset(&current->blocked, sig);
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+ }
+
+ return ret;
+}
+
+/*
+ * handle a potential signal
+ */
+static void do_signal(struct pt_regs *regs, int syscall)
+{
+ struct k_sigaction ka;
+ siginfo_t info;
+ sigset_t *oldset;
+ int signr;
+
+ /* we want the common case to go fast, which is why we may in certain
+ * cases get here from kernel mode */
+ if (!user_mode(regs))
+ return;
+
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else
+ oldset = &current->blocked;
+
+ signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ if (signr > 0) {
+ if (handle_signal(signr, &info, &ka, oldset,
+ regs, syscall) == 0) {
+ /* a signal was successfully delivered; the saved
+ * sigmask will have been stored in the signal frame,
+ * and will be restored by sigreturn, so we can simply
+ * clear the TIF_RESTORE_SIGMASK flag */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+
+ tracehook_signal_handler(signr, &info, &ka, regs, 0);
+ }
+
+ return;
+ }
+
+ /* did we come from a system call? */
+ if (syscall) {
+ /* restart the system call - no handlers present */
+ switch (regs->a4) {
+ case -ERESTARTNOHAND:
+ case -ERESTARTSYS:
+ case -ERESTARTNOINTR:
+ regs->a4 = regs->orig_a4;
+ regs->pc -= 4;
+ break;
+
+ case -ERESTART_RESTARTBLOCK:
+ regs->a4 = regs->orig_a4;
+ regs->b0 = __NR_restart_syscall;
+ regs->pc -= 4;
+ break;
+ }
+ }
+
+ /* if there's no signal to deliver, we just put the saved sigmask
+ * back */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+ }
+}
+
+/*
+ * notification of userspace execution resumption
+ * - triggered by current->work.notify_resume
+ */
+asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags,
+ int syscall)
+{
+ /* deal with pending signal delivery */
+ if (thread_info_flags & ((1 << TIF_SIGPENDING) |
+ (1 << TIF_RESTORE_SIGMASK)))
+ do_signal(regs, syscall);
+
+ if (thread_info_flags & (1 << TIF_NOTIFY_RESUME)) {
+ clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
+ if (current->replacement_session_keyring)
+ key_replace_session_keyring();
+ }
+}
diff --git a/arch/c6x/kernel/soc.c b/arch/c6x/kernel/soc.c
new file mode 100644
index 00000000000..dd45bc39af0
--- /dev/null
+++ b/arch/c6x/kernel/soc.c
@@ -0,0 +1,91 @@
+/*
+ * Miscellaneous SoC-specific hooks.
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/etherdevice.h>
+#include <asm/system.h>
+#include <asm/setup.h>
+#include <asm/soc.h>
+
+struct soc_ops soc_ops;
+
+int soc_get_exception(void)
+{
+ if (!soc_ops.get_exception)
+ return -1;
+ return soc_ops.get_exception();
+}
+
+void soc_assert_event(unsigned int evt)
+{
+ if (soc_ops.assert_event)
+ soc_ops.assert_event(evt);
+}
+
+static u8 cmdline_mac[6];
+
+static int __init get_mac_addr_from_cmdline(char *str)
+{
+ int count, i, val;
+
+ for (count = 0; count < 6 && *str; count++, str += 3) {
+ if (!isxdigit(str[0]) || !isxdigit(str[1]))
+ return 0;
+ if (str[2] != ((count < 5) ? ':' : '\0'))
+ return 0;
+
+ for (i = 0, val = 0; i < 2; i++) {
+ val = val << 4;
+ val |= isdigit(str[i]) ?
+ str[i] - '0' : toupper(str[i]) - 'A' + 10;
+ }
+ cmdline_mac[count] = val;
+ }
+ return 1;
+}
+__setup("emac_addr=", get_mac_addr_from_cmdline);
+
+/*
+ * Setup the MAC address for SoC ethernet devices.
+ *
+ * Before calling this function, the ethernet driver will have
+ * initialized the addr with local-mac-address from the device
+ * tree (if found). Allow command line to override, but not
+ * the fused address.
+ */
+int soc_mac_addr(unsigned int index, u8 *addr)
+{
+ int i, have_dt_mac = 0, have_cmdline_mac = 0, have_fuse_mac = 0;
+
+ for (i = 0; i < 6; i++) {
+ if (cmdline_mac[i])
+ have_cmdline_mac = 1;
+ if (c6x_fuse_mac[i])
+ have_fuse_mac = 1;
+ if (addr[i])
+ have_dt_mac = 1;
+ }
+
+ /* cmdline overrides all */
+ if (have_cmdline_mac)
+ memcpy(addr, cmdline_mac, 6);
+ else if (!have_dt_mac) {
+ if (have_fuse_mac)
+ memcpy(addr, c6x_fuse_mac, 6);
+ else
+ random_ether_addr(addr);
+ }
+
+ /* adjust for specific EMAC device */
+ addr[5] += index * c6x_num_cores;
+ return 1;
+}
+EXPORT_SYMBOL_GPL(soc_mac_addr);
diff --git a/arch/c6x/kernel/switch_to.S b/arch/c6x/kernel/switch_to.S
new file mode 100644
index 00000000000..09177ed0fa5
--- /dev/null
+++ b/arch/c6x/kernel/switch_to.S
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter (msalter@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+
+#define SP B15
+
+ /*
+ * void __switch_to(struct thread_info *prev,
+ * struct thread_info *next,
+ * struct task_struct *tsk) ;
+ */
+ENTRY(__switch_to)
+ LDDW .D2T2 *+B4(THREAD_B15_14),B7:B6
+ || MV .L2X A4,B5 ; prev
+ || MV .L1X B4,A5 ; next
+ || MVC .S2 RILC,B1
+
+ STW .D2T2 B3,*+B5(THREAD_PC)
+ || STDW .D1T1 A13:A12,*+A4(THREAD_A13_12)
+ || MVC .S2 ILC,B0
+
+ LDW .D2T2 *+B4(THREAD_PC),B3
+ || LDDW .D1T1 *+A5(THREAD_A13_12),A13:A12
+
+ STDW .D1T1 A11:A10,*+A4(THREAD_A11_10)
+ || STDW .D2T2 B1:B0,*+B5(THREAD_RICL_ICL)
+#ifndef __DSBT__
+ || MVKL .S2 current_ksp,B1
+#endif
+
+ STDW .D2T2 B15:B14,*+B5(THREAD_B15_14)
+ || STDW .D1T1 A15:A14,*+A4(THREAD_A15_14)
+#ifndef __DSBT__
+ || MVKH .S2 current_ksp,B1
+#endif
+
+ ;; Switch to next SP
+ MV .S2 B7,SP
+#ifdef __DSBT__
+ || STW .D2T2 B7,*+B14(current_ksp)
+#else
+ || STW .D2T2 B7,*B1
+ || MV .L2 B6,B14
+#endif
+ || LDDW .D1T1 *+A5(THREAD_RICL_ICL),A1:A0
+
+ STDW .D2T2 B11:B10,*+B5(THREAD_B11_10)
+ || LDDW .D1T1 *+A5(THREAD_A15_14),A15:A14
+
+ STDW .D2T2 B13:B12,*+B5(THREAD_B13_12)
+ || LDDW .D1T1 *+A5(THREAD_A11_10),A11:A10
+
+ B .S2 B3 ; return in next E1
+ || LDDW .D2T2 *+B4(THREAD_B13_12),B13:B12
+
+ LDDW .D2T2 *+B4(THREAD_B11_10),B11:B10
+ NOP
+
+ MV .L2X A0,B0
+ || MV .S1 A6,A4
+
+ MVC .S2 B0,ILC
+ || MV .L2X A1,B1
+
+ MVC .S2 B1,RILC
+ENDPROC(__switch_to)
diff --git a/arch/c6x/kernel/sys_c6x.c b/arch/c6x/kernel/sys_c6x.c
new file mode 100644
index 00000000000..3e9bdfbee8a
--- /dev/null
+++ b/arch/c6x/kernel/sys_c6x.c
@@ -0,0 +1,74 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/syscalls.h>
+#include <linux/uaccess.h>
+
+#include <asm/syscalls.h>
+
+#ifdef CONFIG_ACCESS_CHECK
+int _access_ok(unsigned long addr, unsigned long size)
+{
+ if (!size)
+ return 1;
+
+ if (!addr || addr > (0xffffffffUL - (size - 1)))
+ goto _bad_access;
+
+ if (segment_eq(get_fs(), KERNEL_DS))
+ return 1;
+
+ if (memory_start <= addr && (addr + size - 1) < memory_end)
+ return 1;
+
+_bad_access:
+ pr_debug("Bad access attempt: pid[%d] addr[%08lx] size[0x%lx]\n",
+ current->pid, addr, size);
+ return 0;
+}
+EXPORT_SYMBOL(_access_ok);
+#endif
+
+/* sys_cache_sync -- sync caches over given range */
+asmlinkage int sys_cache_sync(unsigned long s, unsigned long e)
+{
+ L1D_cache_block_writeback_invalidate(s, e);
+ L1P_cache_block_invalidate(s, e);
+
+ return 0;
+}
+
+/* Provide the actual syscall number to call mapping. */
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+/*
+ * Use trampolines
+ */
+#define sys_pread64 sys_pread_c6x
+#define sys_pwrite64 sys_pwrite_c6x
+#define sys_truncate64 sys_truncate64_c6x
+#define sys_ftruncate64 sys_ftruncate64_c6x
+#define sys_fadvise64 sys_fadvise64_c6x
+#define sys_fadvise64_64 sys_fadvise64_64_c6x
+#define sys_fallocate sys_fallocate_c6x
+
+/* Use sys_mmap_pgoff directly */
+#define sys_mmap2 sys_mmap_pgoff
+
+/*
+ * Note that we can't include <linux/unistd.h> here since the header
+ * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
+ */
+void *sys_call_table[__NR_syscalls] = {
+ [0 ... __NR_syscalls-1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
diff --git a/arch/c6x/kernel/time.c b/arch/c6x/kernel/time.c
new file mode 100644
index 00000000000..4c9f136165f
--- /dev/null
+++ b/arch/c6x/kernel/time.c
@@ -0,0 +1,65 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/clocksource.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/timex.h>
+#include <linux/profile.h>
+
+#include <asm/timer64.h>
+
+static u32 sched_clock_multiplier;
+#define SCHED_CLOCK_SHIFT 16
+
+static cycle_t tsc_read(struct clocksource *cs)
+{
+ return get_cycles();
+}
+
+static struct clocksource clocksource_tsc = {
+ .name = "timestamp",
+ .rating = 300,
+ .read = tsc_read,
+ .mask = CLOCKSOURCE_MASK(64),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+/*
+ * scheduler clock - returns current time in nanoseconds.
+ */
+u64 sched_clock(void)
+{
+ u64 tsc = get_cycles();
+
+ return (tsc * sched_clock_multiplier) >> SCHED_CLOCK_SHIFT;
+}
+
+void time_init(void)
+{
+ u64 tmp = (u64)NSEC_PER_SEC << SCHED_CLOCK_SHIFT;
+
+ do_div(tmp, c6x_core_freq);
+ sched_clock_multiplier = tmp;
+
+ clocksource_register_hz(&clocksource_tsc, c6x_core_freq);
+
+ /* write anything into TSCL to enable counting */
+ set_creg(TSCL, 0);
+
+ /* probe for timer64 event timer */
+ timer64_init();
+}
diff --git a/arch/c6x/kernel/traps.c b/arch/c6x/kernel/traps.c
new file mode 100644
index 00000000000..f50e3edd6da
--- /dev/null
+++ b/arch/c6x/kernel/traps.c
@@ -0,0 +1,423 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kallsyms.h>
+#include <linux/bug.h>
+
+#include <asm/soc.h>
+#include <asm/traps.h>
+
+int (*c6x_nmi_handler)(struct pt_regs *regs);
+
+void __init trap_init(void)
+{
+ ack_exception(EXCEPT_TYPE_NXF);
+ ack_exception(EXCEPT_TYPE_EXC);
+ ack_exception(EXCEPT_TYPE_IXF);
+ ack_exception(EXCEPT_TYPE_SXF);
+ enable_exception();
+}
+
+void show_regs(struct pt_regs *regs)
+{
+ pr_err("\n");
+ pr_err("PC: %08lx SP: %08lx\n", regs->pc, regs->sp);
+ pr_err("Status: %08lx ORIG_A4: %08lx\n", regs->csr, regs->orig_a4);
+ pr_err("A0: %08lx B0: %08lx\n", regs->a0, regs->b0);
+ pr_err("A1: %08lx B1: %08lx\n", regs->a1, regs->b1);
+ pr_err("A2: %08lx B2: %08lx\n", regs->a2, regs->b2);
+ pr_err("A3: %08lx B3: %08lx\n", regs->a3, regs->b3);
+ pr_err("A4: %08lx B4: %08lx\n", regs->a4, regs->b4);
+ pr_err("A5: %08lx B5: %08lx\n", regs->a5, regs->b5);
+ pr_err("A6: %08lx B6: %08lx\n", regs->a6, regs->b6);
+ pr_err("A7: %08lx B7: %08lx\n", regs->a7, regs->b7);
+ pr_err("A8: %08lx B8: %08lx\n", regs->a8, regs->b8);
+ pr_err("A9: %08lx B9: %08lx\n", regs->a9, regs->b9);
+ pr_err("A10: %08lx B10: %08lx\n", regs->a10, regs->b10);
+ pr_err("A11: %08lx B11: %08lx\n", regs->a11, regs->b11);
+ pr_err("A12: %08lx B12: %08lx\n", regs->a12, regs->b12);
+ pr_err("A13: %08lx B13: %08lx\n", regs->a13, regs->b13);
+ pr_err("A14: %08lx B14: %08lx\n", regs->a14, regs->dp);
+ pr_err("A15: %08lx B15: %08lx\n", regs->a15, regs->sp);
+ pr_err("A16: %08lx B16: %08lx\n", regs->a16, regs->b16);
+ pr_err("A17: %08lx B17: %08lx\n", regs->a17, regs->b17);
+ pr_err("A18: %08lx B18: %08lx\n", regs->a18, regs->b18);
+ pr_err("A19: %08lx B19: %08lx\n", regs->a19, regs->b19);
+ pr_err("A20: %08lx B20: %08lx\n", regs->a20, regs->b20);
+ pr_err("A21: %08lx B21: %08lx\n", regs->a21, regs->b21);
+ pr_err("A22: %08lx B22: %08lx\n", regs->a22, regs->b22);
+ pr_err("A23: %08lx B23: %08lx\n", regs->a23, regs->b23);
+ pr_err("A24: %08lx B24: %08lx\n", regs->a24, regs->b24);
+ pr_err("A25: %08lx B25: %08lx\n", regs->a25, regs->b25);
+ pr_err("A26: %08lx B26: %08lx\n", regs->a26, regs->b26);
+ pr_err("A27: %08lx B27: %08lx\n", regs->a27, regs->b27);
+ pr_err("A28: %08lx B28: %08lx\n", regs->a28, regs->b28);
+ pr_err("A29: %08lx B29: %08lx\n", regs->a29, regs->b29);
+ pr_err("A30: %08lx B30: %08lx\n", regs->a30, regs->b30);
+ pr_err("A31: %08lx B31: %08lx\n", regs->a31, regs->b31);
+}
+
+void dump_stack(void)
+{
+ unsigned long stack;
+
+ show_stack(current, &stack);
+}
+EXPORT_SYMBOL(dump_stack);
+
+
+void die(char *str, struct pt_regs *fp, int nr)
+{
+ console_verbose();
+ pr_err("%s: %08x\n", str, nr);
+ show_regs(fp);
+
+ pr_err("Process %s (pid: %d, stackpage=%08lx)\n",
+ current->comm, current->pid, (PAGE_SIZE +
+ (unsigned long) current));
+
+ dump_stack();
+ while (1)
+ ;
+}
+
+static void die_if_kernel(char *str, struct pt_regs *fp, int nr)
+{
+ if (user_mode(fp))
+ return;
+
+ die(str, fp, nr);
+}
+
+
+/* Internal exceptions */
+static struct exception_info iexcept_table[10] = {
+ { "Oops - instruction fetch", SIGBUS, BUS_ADRERR },
+ { "Oops - fetch packet", SIGBUS, BUS_ADRERR },
+ { "Oops - execute packet", SIGILL, ILL_ILLOPC },
+ { "Oops - undefined instruction", SIGILL, ILL_ILLOPC },
+ { "Oops - resource conflict", SIGILL, ILL_ILLOPC },
+ { "Oops - resource access", SIGILL, ILL_PRVREG },
+ { "Oops - privilege", SIGILL, ILL_PRVOPC },
+ { "Oops - loops buffer", SIGILL, ILL_ILLOPC },
+ { "Oops - software exception", SIGILL, ILL_ILLTRP },
+ { "Oops - unknown exception", SIGILL, ILL_ILLOPC }
+};
+
+/* External exceptions */
+static struct exception_info eexcept_table[128] = {
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - external exception", SIGBUS, BUS_ADRERR },
+ { "Oops - CPU memory protection fault", SIGSEGV, SEGV_ACCERR },
+ { "Oops - CPU memory protection fault in L1P", SIGSEGV, SEGV_ACCERR },
+ { "Oops - DMA memory protection fault in L1P", SIGSEGV, SEGV_ACCERR },
+ { "Oops - CPU memory protection fault in L1D", SIGSEGV, SEGV_ACCERR },
+ { "Oops - DMA memory protection fault in L1D", SIGSEGV, SEGV_ACCERR },
+ { "Oops - CPU memory protection fault in L2", SIGSEGV, SEGV_ACCERR },
+ { "Oops - DMA memory protection fault in L2", SIGSEGV, SEGV_ACCERR },
+ { "Oops - EMC CPU memory protection fault", SIGSEGV, SEGV_ACCERR },
+ { "Oops - EMC bus error", SIGBUS, BUS_ADRERR }
+};
+
+static void do_trap(struct exception_info *except_info, struct pt_regs *regs)
+{
+ unsigned long addr = instruction_pointer(regs);
+ siginfo_t info;
+
+ if (except_info->code != TRAP_BRKPT)
+ pr_err("TRAP: %s PC[0x%lx] signo[%d] code[%d]\n",
+ except_info->kernel_str, regs->pc,
+ except_info->signo, except_info->code);
+
+ die_if_kernel(except_info->kernel_str, regs, addr);
+
+ info.si_signo = except_info->signo;
+ info.si_errno = 0;
+ info.si_code = except_info->code;
+ info.si_addr = (void __user *)addr;
+
+ force_sig_info(except_info->signo, &info, current);
+}
+
+/*
+ * Process an internal exception (non maskable)
+ */
+static int process_iexcept(struct pt_regs *regs)
+{
+ unsigned int iexcept_report = get_iexcept();
+ unsigned int iexcept_num;
+
+ ack_exception(EXCEPT_TYPE_IXF);
+
+ pr_err("IEXCEPT: PC[0x%lx]\n", regs->pc);
+
+ while (iexcept_report) {
+ iexcept_num = __ffs(iexcept_report);
+ iexcept_report &= ~(1 << iexcept_num);
+ set_iexcept(iexcept_report);
+ if (*(unsigned int *)regs->pc == BKPT_OPCODE) {
+ /* This is a breakpoint */
+ struct exception_info bkpt_exception = {
+ "Oops - undefined instruction",
+ SIGTRAP, TRAP_BRKPT
+ };
+ do_trap(&bkpt_exception, regs);
+ iexcept_report &= ~(0xFF);
+ set_iexcept(iexcept_report);
+ continue;
+ }
+
+ do_trap(&iexcept_table[iexcept_num], regs);
+ }
+ return 0;
+}
+
+/*
+ * Process an external exception (maskable)
+ */
+static void process_eexcept(struct pt_regs *regs)
+{
+ int evt;
+
+ pr_err("EEXCEPT: PC[0x%lx]\n", regs->pc);
+
+ while ((evt = soc_get_exception()) >= 0)
+ do_trap(&eexcept_table[evt], regs);
+
+ ack_exception(EXCEPT_TYPE_EXC);
+}
+
+/*
+ * Main exception processing
+ */
+asmlinkage int process_exception(struct pt_regs *regs)
+{
+ unsigned int type;
+ unsigned int type_num;
+ unsigned int ie_num = 9; /* default is unknown exception */
+
+ while ((type = get_except_type()) != 0) {
+ type_num = fls(type) - 1;
+
+ switch (type_num) {
+ case EXCEPT_TYPE_NXF:
+ ack_exception(EXCEPT_TYPE_NXF);
+ if (c6x_nmi_handler)
+ (c6x_nmi_handler)(regs);
+ else
+ pr_alert("NMI interrupt!\n");
+ break;
+
+ case EXCEPT_TYPE_IXF:
+ if (process_iexcept(regs))
+ return 1;
+ break;
+
+ case EXCEPT_TYPE_EXC:
+ process_eexcept(regs);
+ break;
+
+ case EXCEPT_TYPE_SXF:
+ ie_num = 8;
+ default:
+ ack_exception(type_num);
+ do_trap(&iexcept_table[ie_num], regs);
+ break;
+ }
+ }
+ return 0;
+}
+
+static int kstack_depth_to_print = 48;
+
+static void show_trace(unsigned long *stack, unsigned long *endstack)
+{
+ unsigned long addr;
+ int i;
+
+ pr_debug("Call trace:");
+ i = 0;
+ while (stack + 1 <= endstack) {
+ addr = *stack++;
+ /*
+ * If the address is either in the text segment of the
+ * kernel, or in the region which contains vmalloc'ed
+ * memory, it *may* be the address of a calling
+ * routine; if so, print it so that someone tracing
+ * down the cause of the crash will be able to figure
+ * out the call path that was taken.
+ */
+ if (__kernel_text_address(addr)) {
+#ifndef CONFIG_KALLSYMS
+ if (i % 5 == 0)
+ pr_debug("\n ");
+#endif
+ pr_debug(" [<%08lx>]", addr);
+ print_symbol(" %s\n", addr);
+ i++;
+ }
+ }
+ pr_debug("\n");
+}
+
+void show_stack(struct task_struct *task, unsigned long *stack)
+{
+ unsigned long *p, *endstack;
+ int i;
+
+ if (!stack) {
+ if (task && task != current)
+ /* We know this is a kernel stack,
+ so this is the start/end */
+ stack = (unsigned long *)thread_saved_ksp(task);
+ else
+ stack = (unsigned long *)&stack;
+ }
+ endstack = (unsigned long *)(((unsigned long)stack + THREAD_SIZE - 1)
+ & -THREAD_SIZE);
+
+ pr_debug("Stack from %08lx:", (unsigned long)stack);
+ for (i = 0, p = stack; i < kstack_depth_to_print; i++) {
+ if (p + 1 > endstack)
+ break;
+ if (i % 8 == 0)
+ pr_cont("\n ");
+ pr_cont(" %08lx", *p++);
+ }
+ pr_cont("\n");
+ show_trace(stack, endstack);
+}
+
+int is_valid_bugaddr(unsigned long addr)
+{
+ return __kernel_text_address(addr);
+}
diff --git a/arch/c6x/kernel/vectors.S b/arch/c6x/kernel/vectors.S
new file mode 100644
index 00000000000..c95c66fc71e
--- /dev/null
+++ b/arch/c6x/kernel/vectors.S
@@ -0,0 +1,81 @@
+;
+; Port on Texas Instruments TMS320C6x architecture
+;
+; Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License version 2 as
+; published by the Free Software Foundation.
+;
+; This section handles all the interrupt vector routines.
+; At RESET the processor sets up the DRAM timing parameters and
+; branches to the label _c_int00 which handles initialization for the C code.
+;
+
+#define ALIGNMENT 5
+
+ .macro IRQVEC name, handler
+ .align ALIGNMENT
+ .hidden \name
+ .global \name
+\name:
+#ifdef CONFIG_C6X_BIG_KERNEL
+ STW .D2T1 A0,*B15--[2]
+ || MVKL .S1 \handler,A0
+ MVKH .S1 \handler,A0
+ B .S2X A0
+ LDW .D2T1 *++B15[2],A0
+ NOP 4
+ NOP
+ NOP
+ .endm
+#else /* CONFIG_C6X_BIG_KERNEL */
+ B .S2 \handler
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+ .endm
+#endif /* CONFIG_C6X_BIG_KERNEL */
+
+ .sect ".vectors","ax"
+ .align ALIGNMENT
+ .global RESET
+ .hidden RESET
+RESET:
+#ifdef CONFIG_C6X_BIG_KERNEL
+ MVKL .S1 _c_int00,A0 ; branch to _c_int00
+ MVKH .S1 _c_int00,A0
+ B .S2X A0
+#else
+ B .S2 _c_int00
+ NOP
+ NOP
+#endif
+ NOP
+ NOP
+ NOP
+ NOP
+ NOP
+
+
+ IRQVEC NMI,_nmi_handler ; NMI interrupt
+ IRQVEC AINT,_bad_interrupt ; reserved
+ IRQVEC MSGINT,_bad_interrupt ; reserved
+
+ IRQVEC INT4,_int4_handler
+ IRQVEC INT5,_int5_handler
+ IRQVEC INT6,_int6_handler
+ IRQVEC INT7,_int7_handler
+ IRQVEC INT8,_int8_handler
+ IRQVEC INT9,_int9_handler
+ IRQVEC INT10,_int10_handler
+ IRQVEC INT11,_int11_handler
+ IRQVEC INT12,_int12_handler
+ IRQVEC INT13,_int13_handler
+ IRQVEC INT14,_int14_handler
+ IRQVEC INT15,_int15_handler
diff --git a/arch/c6x/kernel/vmlinux.lds.S b/arch/c6x/kernel/vmlinux.lds.S
new file mode 100644
index 00000000000..1d81c4c129e
--- /dev/null
+++ b/arch/c6x/kernel/vmlinux.lds.S
@@ -0,0 +1,162 @@
+/*
+ * ld script for the c6x kernel
+ *
+ * Copyright (C) 2010, 2011 Texas Instruments Incorporated
+ * Mark Salter <msalter@redhat.com>
+ */
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+
+ENTRY(_c_int00)
+
+#if defined(CONFIG_CPU_BIG_ENDIAN)
+jiffies = jiffies_64 + 4;
+#else
+jiffies = jiffies_64;
+#endif
+
+#define READONLY_SEGMENT_START \
+ . = PAGE_OFFSET;
+#define READWRITE_SEGMENT_START \
+ . = ALIGN(128); \
+ _data_lma = .;
+
+SECTIONS
+{
+ /*
+ * Start kernel read only segment
+ */
+ READONLY_SEGMENT_START
+
+ .vectors :
+ {
+ _vectors_start = .;
+ *(.vectors)
+ . = ALIGN(0x400);
+ _vectors_end = .;
+ }
+
+ . = ALIGN(0x1000);
+ .cmdline :
+ {
+ *(.cmdline)
+ }
+
+ /*
+ * This section contains data which may be shared with other
+ * cores. It needs to be a fixed offset from PAGE_OFFSET
+ * regardless of kernel configuration.
+ */
+ .virtio_ipc_dev :
+ {
+ *(.virtio_ipc_dev)
+ }
+
+ . = ALIGN(PAGE_SIZE);
+ .init :
+ {
+ _stext = .;
+ _sinittext = .;
+ HEAD_TEXT
+ INIT_TEXT
+ _einittext = .;
+ }
+
+ __init_begin = _stext;
+ INIT_DATA_SECTION(16)
+
+ PERCPU_SECTION(128)
+
+ . = ALIGN(PAGE_SIZE);
+ __init_end = .;
+
+ .text :
+ {
+ _text = .;
+ TEXT_TEXT
+ SCHED_TEXT
+ LOCK_TEXT
+ IRQENTRY_TEXT
+ KPROBES_TEXT
+ *(.fixup)
+ *(.gnu.warning)
+ }
+
+ EXCEPTION_TABLE(16)
+ NOTES
+
+ RO_DATA_SECTION(PAGE_SIZE)
+ .const :
+ {
+ *(.const .const.* .gnu.linkonce.r.*)
+ *(.switch)
+ }
+
+ . = ALIGN (8) ;
+ __fdt_blob : AT(ADDR(__fdt_blob) - LOAD_OFFSET)
+ {
+ _fdt_start = . ; /* place for fdt blob */
+ *(__fdt_blob) ; /* Any link-placed DTB */
+ BYTE(0); /* section always has contents */
+ . = _fdt_start + 0x4000; /* Pad up to 16kbyte */
+ _fdt_end = . ;
+ }
+
+ _etext = .;
+
+ /*
+ * Start kernel read-write segment.
+ */
+ READWRITE_SEGMENT_START
+ _sdata = .;
+
+ .fardata : AT(ADDR(.fardata) - LOAD_OFFSET)
+ {
+ INIT_TASK_DATA(THREAD_SIZE)
+ NOSAVE_DATA
+ PAGE_ALIGNED_DATA(PAGE_SIZE)
+ CACHELINE_ALIGNED_DATA(128)
+ READ_MOSTLY_DATA(128)
+ DATA_DATA
+ CONSTRUCTORS
+ *(.data1)
+ *(.fardata .fardata.*)
+ *(.data.debug_bpt)
+ }
+
+ .neardata ALIGN(8) : AT(ADDR(.neardata) - LOAD_OFFSET)
+ {
+ *(.neardata2 .neardata2.* .gnu.linkonce.s2.*)
+ *(.neardata .neardata.* .gnu.linkonce.s.*)
+ . = ALIGN(8);
+ }
+
+ _edata = .;
+
+ __bss_start = .;
+ SBSS(8)
+ BSS(8)
+ .far :
+ {
+ . = ALIGN(8);
+ *(.dynfar)
+ *(.far .far.* .gnu.linkonce.b.*)
+ . = ALIGN(8);
+ }
+ __bss_stop = .;
+
+ _end = .;
+
+ DWARF_DEBUG
+
+ /DISCARD/ :
+ {
+ EXIT_TEXT
+ EXIT_DATA
+ EXIT_CALL
+ *(.discard)
+ *(.discard.*)
+ *(.interp)
+ }
+}
diff --git a/arch/c6x/lib/Makefile b/arch/c6x/lib/Makefile
new file mode 100644
index 00000000000..ffd3c659091
--- /dev/null
+++ b/arch/c6x/lib/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for arch/c6x/lib/
+#
+
+lib-y := divu.o divi.o pop_rts.o push_rts.o remi.o remu.o strasgi.o llshru.o
+lib-y += llshr.o llshl.o negll.o mpyll.o divremi.o divremu.o
+lib-y += checksum.o csum_64plus.o memcpy_64plus.o strasgi_64plus.o
diff --git a/arch/c6x/lib/checksum.c b/arch/c6x/lib/checksum.c
new file mode 100644
index 00000000000..67cc93b0b93
--- /dev/null
+++ b/arch/c6x/lib/checksum.c
@@ -0,0 +1,36 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/module.h>
+#include <net/checksum.h>
+
+#include <asm/byteorder.h>
+
+/*
+ * copy from fs while checksumming, otherwise like csum_partial
+ */
+__wsum
+csum_partial_copy_from_user(const void __user *src, void *dst, int len,
+ __wsum sum, int *csum_err)
+{
+ int missing;
+
+ missing = __copy_from_user(dst, src, len);
+ if (missing) {
+ memset(dst + len - missing, 0, missing);
+ *csum_err = -EFAULT;
+ } else
+ *csum_err = 0;
+
+ return csum_partial(dst, len, sum);
+}
+EXPORT_SYMBOL(csum_partial_copy_from_user);
+
+/* These are from csum_64plus.S */
+EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(csum_partial_copy);
+EXPORT_SYMBOL(ip_compute_csum);
+EXPORT_SYMBOL(ip_fast_csum);
diff --git a/arch/c6x/lib/csum_64plus.S b/arch/c6x/lib/csum_64plus.S
new file mode 100644
index 00000000000..6d258964722
--- /dev/null
+++ b/arch/c6x/lib/csum_64plus.S
@@ -0,0 +1,419 @@
+;
+; linux/arch/c6x/lib/csum_64plus.s
+;
+; Port on Texas Instruments TMS320C6x architecture
+;
+; Copyright (C) 2006, 2009, 2010, 2011 Texas Instruments Incorporated
+; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License version 2 as
+; published by the Free Software Foundation.
+;
+#include <linux/linkage.h>
+
+;
+;unsigned int csum_partial_copy(const char *src, char * dst,
+; int len, int sum)
+;
+; A4: src
+; B4: dst
+; A6: len
+; B6: sum
+; return csum in A4
+;
+
+ .text
+ENTRY(csum_partial_copy)
+ MVC .S2 ILC,B30
+
+ MV .D1X B6,A31 ; given csum
+ ZERO .D1 A9 ; csum (a side)
+|| ZERO .D2 B9 ; csum (b side)
+|| SHRU .S2X A6,2,B5 ; len / 4
+
+ ;; Check alignment and size
+ AND .S1 3,A4,A1
+|| AND .S2 3,B4,B0
+ OR .L2X B0,A1,B0 ; non aligned condition
+|| MVC .S2 B5,ILC
+|| MVK .D2 1,B2
+|| MV .D1X B5,A1 ; words condition
+ [!A1] B .S1 L8
+ [B0] BNOP .S1 L6,5
+
+ SPLOOP 1
+
+ ;; Main loop for aligned words
+ LDW .D1T1 *A4++,A7
+ NOP 4
+ MV .S2X A7,B7
+|| EXTU .S1 A7,0,16,A16
+ STW .D2T2 B7,*B4++
+|| MPYU .M2 B7,B2,B8
+|| ADD .L1 A16,A9,A9
+ NOP
+ SPKERNEL 8,0
+|| ADD .L2 B8,B9,B9
+
+ ZERO .D1 A1
+|| ADD .L1X A9,B9,A9 ; add csum from a and b sides
+
+L6:
+ [!A1] BNOP .S1 L8,5
+
+ ;; Main loop for non-aligned words
+ SPLOOP 2
+ || MVK .L1 1,A2
+
+ LDNW .D1T1 *A4++,A7
+ NOP 3
+
+ NOP
+ MV .S2X A7,B7
+ || EXTU .S1 A7,0,16,A16
+ || MPYU .M1 A7,A2,A8
+
+ ADD .L1 A16,A9,A9
+ SPKERNEL 6,0
+ || STNW .D2T2 B7,*B4++
+ || ADD .L1 A8,A9,A9
+
+L8: AND .S2X 2,A6,B5
+ CMPGT .L2 B5,0,B0
+ [!B0] BNOP .S1 L82,4
+
+ ;; Manage half-word
+ ZERO .L1 A7
+|| ZERO .D1 A8
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+
+ LDBU .D1T1 *A4++,A7
+ LDBU .D1T1 *A4++,A8
+ NOP 3
+ SHL .S1 A7,8,A0
+ ADD .S1 A8,A9,A9
+ STB .D2T1 A7,*B4++
+|| ADD .S1 A0,A9,A9
+ STB .D2T1 A8,*B4++
+
+#else
+
+ LDBU .D1T1 *A4++,A7
+ LDBU .D1T1 *A4++,A8
+ NOP 3
+ ADD .S1 A7,A9,A9
+ SHL .S1 A8,8,A0
+
+ STB .D2T1 A7,*B4++
+|| ADD .S1 A0,A9,A9
+ STB .D2T1 A8,*B4++
+
+#endif
+
+ ;; Manage eventually the last byte
+L82: AND .S2X 1,A6,B0
+ [!B0] BNOP .S1 L9,5
+
+|| ZERO .L1 A7
+
+L83: LDBU .D1T1 *A4++,A7
+ NOP 4
+
+ MV .L2X A7,B7
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+
+ STB .D2T2 B7,*B4++
+|| SHL .S1 A7,8,A7
+ ADD .S1 A7,A9,A9
+
+#else
+
+ STB .D2T2 B7,*B4++
+|| ADD .S1 A7,A9,A9
+
+#endif
+
+ ;; Fold the csum
+L9: SHRU .S2X A9,16,B0
+ [!B0] BNOP .S1 L10,5
+
+L91: SHRU .S2X A9,16,B4
+|| EXTU .S1 A9,16,16,A3
+ ADD .D1X A3,B4,A9
+
+ SHRU .S1 A9,16,A0
+ [A0] BNOP .S1 L91,5
+
+L10: ADD .D1 A31,A9,A9
+ MV .D1 A9,A4
+
+ BNOP .S2 B3,4
+ MVC .S2 B30,ILC
+ENDPROC(csum_partial_copy)
+
+;
+;unsigned short
+;ip_fast_csum(unsigned char *iph, unsigned int ihl)
+;{
+; unsigned int checksum = 0;
+; unsigned short *tosum = (unsigned short *) iph;
+; int len;
+;
+; len = ihl*4;
+;
+; if (len <= 0)
+; return 0;
+;
+; while(len) {
+; len -= 2;
+; checksum += *tosum++;
+; }
+; if (len & 1)
+; checksum += *(unsigned char*) tosum;
+;
+; while(checksum >> 16)
+; checksum = (checksum & 0xffff) + (checksum >> 16);
+;
+; return ~checksum;
+;}
+;
+; A4: iph
+; B4: ihl
+; return checksum in A4
+;
+ .text
+
+ENTRY(ip_fast_csum)
+ ZERO .D1 A5
+ || MVC .S2 ILC,B30
+ SHL .S2 B4,2,B0
+ CMPGT .L2 B0,0,B1
+ [!B1] BNOP .S1 L15,4
+ [!B1] ZERO .D1 A3
+
+ [!B0] B .S1 L12
+ SHRU .S2 B0,1,B0
+ MVC .S2 B0,ILC
+ NOP 3
+
+ SPLOOP 1
+ LDHU .D1T1 *A4++,A3
+ NOP 3
+ NOP
+ SPKERNEL 5,0
+ || ADD .L1 A3,A5,A5
+
+L12: SHRU .S1 A5,16,A0
+ [!A0] BNOP .S1 L14,5
+
+L13: SHRU .S2X A5,16,B4
+ EXTU .S1 A5,16,16,A3
+ ADD .D1X A3,B4,A5
+ SHRU .S1 A5,16,A0
+ [A0] BNOP .S1 L13,5
+
+L14: NOT .D1 A5,A3
+ EXTU .S1 A3,16,16,A3
+
+L15: BNOP .S2 B3,3
+ MVC .S2 B30,ILC
+ MV .D1 A3,A4
+ENDPROC(ip_fast_csum)
+
+;
+;unsigned short
+;do_csum(unsigned char *buff, unsigned int len)
+;{
+; int odd, count;
+; unsigned int result = 0;
+;
+; if (len <= 0)
+; goto out;
+; odd = 1 & (unsigned long) buff;
+; if (odd) {
+;#ifdef __LITTLE_ENDIAN
+; result += (*buff << 8);
+;#else
+; result = *buff;
+;#endif
+; len--;
+; buff++;
+; }
+; count = len >> 1; /* nr of 16-bit words.. */
+; if (count) {
+; if (2 & (unsigned long) buff) {
+; result += *(unsigned short *) buff;
+; count--;
+; len -= 2;
+; buff += 2;
+; }
+; count >>= 1; /* nr of 32-bit words.. */
+; if (count) {
+; unsigned int carry = 0;
+; do {
+; unsigned int w = *(unsigned int *) buff;
+; count--;
+; buff += 4;
+; result += carry;
+; result += w;
+; carry = (w > result);
+; } while (count);
+; result += carry;
+; result = (result & 0xffff) + (result >> 16);
+; }
+; if (len & 2) {
+; result += *(unsigned short *) buff;
+; buff += 2;
+; }
+; }
+; if (len & 1)
+;#ifdef __LITTLE_ENDIAN
+; result += *buff;
+;#else
+; result += (*buff << 8);
+;#endif
+; result = (result & 0xffff) + (result >> 16);
+; /* add up carry.. */
+; result = (result & 0xffff) + (result >> 16);
+; if (odd)
+; result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
+;out:
+; return result;
+;}
+;
+; A4: buff
+; B4: len
+; return checksum in A4
+;
+
+ENTRY(do_csum)
+ CMPGT .L2 B4,0,B0
+ [!B0] BNOP .S1 L26,3
+ EXTU .S1 A4,31,31,A0
+
+ MV .L1 A0,A3
+|| MV .S1X B3,A5
+|| MV .L2 B4,B3
+|| ZERO .D1 A1
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ [A0] SUB .L2 B3,1,B3
+|| [A0] LDBU .D1T1 *A4++,A1
+#else
+ [!A0] BNOP .S1 L21,5
+|| [A0] LDBU .D1T1 *A4++,A0
+ SUB .L2 B3,1,B3
+|| SHL .S1 A0,8,A1
+L21:
+#endif
+ SHR .S2 B3,1,B0
+ [!B0] BNOP .S1 L24,3
+ MVK .L1 2,A0
+ AND .L1 A4,A0,A0
+
+ [!A0] BNOP .S1 L22,5
+|| [A0] LDHU .D1T1 *A4++,A0
+ SUB .L2 B0,1,B0
+|| SUB .S2 B3,2,B3
+|| ADD .L1 A0,A1,A1
+L22:
+ SHR .S2 B0,1,B0
+|| ZERO .L1 A0
+
+ [!B0] BNOP .S1 L23,5
+|| [B0] MVC .S2 B0,ILC
+
+ SPLOOP 3
+ SPMASK L1
+|| MV .L1 A1,A2
+|| LDW .D1T1 *A4++,A1
+
+ NOP 4
+ ADD .L1 A0,A1,A0
+ ADD .L1 A2,A0,A2
+
+ SPKERNEL 1,2
+|| CMPGTU .L1 A1,A2,A0
+
+ ADD .L1 A0,A2,A6
+ EXTU .S1 A6,16,16,A7
+ SHRU .S2X A6,16,B0
+ NOP 1
+ ADD .L1X A7,B0,A1
+L23:
+ MVK .L2 2,B0
+ AND .L2 B3,B0,B0
+ [B0] LDHU .D1T1 *A4++,A0
+ NOP 4
+ [B0] ADD .L1 A0,A1,A1
+L24:
+ EXTU .S2 B3,31,31,B0
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ [!B0] BNOP .S1 L25,4
+|| [B0] LDBU .D1T1 *A4,A0
+ SHL .S1 A0,8,A0
+ ADD .L1 A0,A1,A1
+L25:
+#else
+ [B0] LDBU .D1T1 *A4,A0
+ NOP 4
+ [B0] ADD .L1 A0,A1,A1
+#endif
+ EXTU .S1 A1,16,16,A0
+ SHRU .S2X A1,16,B0
+ NOP 1
+ ADD .L1X A0,B0,A0
+ SHRU .S1 A0,16,A1
+ ADD .L1 A0,A1,A0
+ EXTU .S1 A0,16,16,A1
+ EXTU .S1 A1,16,24,A2
+
+ EXTU .S1 A1,24,16,A0
+|| MV .L2X A3,B0
+
+ [B0] OR .L1 A0,A2,A1
+L26:
+ NOP 1
+ BNOP .S2X A5,4
+ MV .L1 A1,A4
+ENDPROC(do_csum)
+
+;__wsum csum_partial(const void *buff, int len, __wsum wsum)
+;{
+; unsigned int sum = (__force unsigned int)wsum;
+; unsigned int result = do_csum(buff, len);
+;
+; /* add in old sum, and carry.. */
+; result += sum;
+; if (sum > result)
+; result += 1;
+; return (__force __wsum)result;
+;}
+;
+ENTRY(csum_partial)
+ MV .L1X B3,A9
+|| CALLP .S2 do_csum,B3
+|| MV .S1 A6,A8
+ BNOP .S2X A9,2
+ ADD .L1 A8,A4,A1
+ CMPGTU .L1 A8,A1,A0
+ ADD .L1 A1,A0,A4
+ENDPROC(csum_partial)
+
+;unsigned short
+;ip_compute_csum(unsigned char *buff, unsigned int len)
+;
+; A4: buff
+; B4: len
+; return checksum in A4
+
+ENTRY(ip_compute_csum)
+ MV .L1X B3,A9
+|| CALLP .S2 do_csum,B3
+ BNOP .S2X A9,3
+ NOT .S1 A4,A4
+ CLR .S1 A4,16,31,A4
+ENDPROC(ip_compute_csum)
diff --git a/arch/c6x/lib/divi.S b/arch/c6x/lib/divi.S
new file mode 100644
index 00000000000..4bde924f2a9
--- /dev/null
+++ b/arch/c6x/lib/divi.S
@@ -0,0 +1,53 @@
+;; Copyright 2010 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ ;; ABI considerations for the divide functions
+ ;; The following registers are call-used:
+ ;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5
+ ;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4
+ ;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4
+ ;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4
+ ;;
+ ;; In our implementation, divu and remu are leaf functions,
+ ;; while both divi and remi call into divu.
+ ;; A0 is not clobbered by any of the functions.
+ ;; divu does not clobber B2 either, which is taken advantage of
+ ;; in remi.
+ ;; divi uses B5 to hold the original return address during
+ ;; the call to divu.
+ ;; remi uses B2 and A5 to hold the input values during the
+ ;; call to divu. It stores B3 in on the stack.
+
+ .text
+ENTRY(__c6xabi_divi)
+ call .s2 __c6xabi_divu
+|| mv .d2 B3, B5
+|| cmpgt .l1 0, A4, A1
+|| cmpgt .l2 0, B4, B1
+
+ [A1] neg .l1 A4, A4
+|| [B1] neg .l2 B4, B4
+|| xor .s1x A1, B1, A1
+ [A1] addkpc .s2 _divu_ret, B3, 4
+_divu_ret:
+ neg .l1 A4, A4
+|| mv .l2 B3,B5
+|| ret .s2 B5
+ nop 5
+ENDPROC(__c6xabi_divi)
diff --git a/arch/c6x/lib/divremi.S b/arch/c6x/lib/divremi.S
new file mode 100644
index 00000000000..64bc5aa95ad
--- /dev/null
+++ b/arch/c6x/lib/divremi.S
@@ -0,0 +1,46 @@
+;; Copyright 2010 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ .text
+ENTRY(__c6xabi_divremi)
+ stw .d2t2 B3, *B15--[2]
+|| cmpgt .l1 0, A4, A1
+|| cmpgt .l2 0, B4, B2
+|| mv .s1 A4, A5
+|| call .s2 __c6xabi_divu
+
+ [A1] neg .l1 A4, A4
+|| [B2] neg .l2 B4, B4
+|| xor .s2x B2, A1, B0
+|| mv .d2 B4, B2
+
+ [B0] addkpc .s2 _divu_ret_1, B3, 1
+ [!B0] addkpc .s2 _divu_ret_2, B3, 1
+ nop 2
+_divu_ret_1:
+ neg .l1 A4, A4
+_divu_ret_2:
+ ldw .d2t2 *++B15[2], B3
+
+ mpy32 .m1x A4, B2, A6
+ nop 3
+ ret .s2 B3
+ sub .l1 A5, A6, A5
+ nop 4
+ENDPROC(__c6xabi_divremi)
diff --git a/arch/c6x/lib/divremu.S b/arch/c6x/lib/divremu.S
new file mode 100644
index 00000000000..caa9f23ee16
--- /dev/null
+++ b/arch/c6x/lib/divremu.S
@@ -0,0 +1,87 @@
+;; Copyright 2011 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ .text
+ENTRY(__c6xabi_divremu)
+ ;; We use a series of up to 31 subc instructions. First, we find
+ ;; out how many leading zero bits there are in the divisor. This
+ ;; gives us both a shift count for aligning (shifting) the divisor
+ ;; to the, and the number of times we have to execute subc.
+
+ ;; At the end, we have both the remainder and most of the quotient
+ ;; in A4. The top bit of the quotient is computed first and is
+ ;; placed in A2.
+
+ ;; Return immediately if the dividend is zero. Setting B4 to 1
+ ;; is a trick to allow us to leave the following insns in the jump
+ ;; delay slot without affecting the result.
+ mv .s2x A4, B1
+
+ [b1] lmbd .l2 1, B4, B1
+||[!b1] b .s2 B3 ; RETURN A
+||[!b1] mvk .d2 1, B4
+
+||[!b1] zero .s1 A5
+ mv .l1x B1, A6
+|| shl .s2 B4, B1, B4
+
+ ;; The loop performs a maximum of 28 steps, so we do the
+ ;; first 3 here.
+ cmpltu .l1x A4, B4, A2
+ [!A2] sub .l1x A4, B4, A4
+|| shru .s2 B4, 1, B4
+|| xor .s1 1, A2, A2
+
+ shl .s1 A2, 31, A2
+|| [b1] subc .l1x A4,B4,A4
+|| [b1] add .s2 -1, B1, B1
+ [b1] subc .l1x A4,B4,A4
+|| [b1] add .s2 -1, B1, B1
+
+ ;; RETURN A may happen here (note: must happen before the next branch)
+__divremu0:
+ cmpgt .l2 B1, 7, B0
+|| [b1] subc .l1x A4,B4,A4
+|| [b1] add .s2 -1, B1, B1
+ [b1] subc .l1x A4,B4,A4
+|| [b1] add .s2 -1, B1, B1
+|| [b0] b .s1 __divremu0
+ [b1] subc .l1x A4,B4,A4
+|| [b1] add .s2 -1, B1, B1
+ [b1] subc .l1x A4,B4,A4
+|| [b1] add .s2 -1, B1, B1
+ [b1] subc .l1x A4,B4,A4
+|| [b1] add .s2 -1, B1, B1
+ [b1] subc .l1x A4,B4,A4
+|| [b1] add .s2 -1, B1, B1
+ [b1] subc .l1x A4,B4,A4
+|| [b1] add .s2 -1, B1, B1
+ ;; loop backwards branch happens here
+
+ ret .s2 B3
+|| mvk .s1 32, A1
+ sub .l1 A1, A6, A6
+|| extu .s1 A4, A6, A5
+ shl .s1 A4, A6, A4
+ shru .s1 A4, 1, A4
+|| sub .l1 A6, 1, A6
+ or .l1 A2, A4, A4
+ shru .s1 A4, A6, A4
+ nop
+ENDPROC(__c6xabi_divremu)
diff --git a/arch/c6x/lib/divu.S b/arch/c6x/lib/divu.S
new file mode 100644
index 00000000000..64af3c006dd
--- /dev/null
+++ b/arch/c6x/lib/divu.S
@@ -0,0 +1,98 @@
+;; Copyright 2010 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ ;; ABI considerations for the divide functions
+ ;; The following registers are call-used:
+ ;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5
+ ;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4
+ ;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4
+ ;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4
+ ;;
+ ;; In our implementation, divu and remu are leaf functions,
+ ;; while both divi and remi call into divu.
+ ;; A0 is not clobbered by any of the functions.
+ ;; divu does not clobber B2 either, which is taken advantage of
+ ;; in remi.
+ ;; divi uses B5 to hold the original return address during
+ ;; the call to divu.
+ ;; remi uses B2 and A5 to hold the input values during the
+ ;; call to divu. It stores B3 in on the stack.
+
+ .text
+ENTRY(__c6xabi_divu)
+ ;; We use a series of up to 31 subc instructions. First, we find
+ ;; out how many leading zero bits there are in the divisor. This
+ ;; gives us both a shift count for aligning (shifting) the divisor
+ ;; to the, and the number of times we have to execute subc.
+
+ ;; At the end, we have both the remainder and most of the quotient
+ ;; in A4. The top bit of the quotient is computed first and is
+ ;; placed in A2.
+
+ ;; Return immediately if the dividend is zero.
+ mv .s2x A4, B1
+ [B1] lmbd .l2 1, B4, B1
+|| [!B1] b .s2 B3 ; RETURN A
+|| [!B1] mvk .d2 1, B4
+ mv .l1x B1, A6
+|| shl .s2 B4, B1, B4
+
+ ;; The loop performs a maximum of 28 steps, so we do the
+ ;; first 3 here.
+ cmpltu .l1x A4, B4, A2
+ [!A2] sub .l1x A4, B4, A4
+|| shru .s2 B4, 1, B4
+|| xor .s1 1, A2, A2
+
+ shl .s1 A2, 31, A2
+|| [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+
+ ;; RETURN A may happen here (note: must happen before the next branch)
+_divu_loop:
+ cmpgt .l2 B1, 7, B0
+|| [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+|| [B0] b .s1 _divu_loop
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ ;; loop backwards branch happens here
+
+ ret .s2 B3
+|| mvk .s1 32, A1
+ sub .l1 A1, A6, A6
+ shl .s1 A4, A6, A4
+ shru .s1 A4, 1, A4
+|| sub .l1 A6, 1, A6
+ or .l1 A2, A4, A4
+ shru .s1 A4, A6, A4
+ nop
+ENDPROC(__c6xabi_divu)
diff --git a/arch/c6x/lib/llshl.S b/arch/c6x/lib/llshl.S
new file mode 100644
index 00000000000..7b105e2d1b7
--- /dev/null
+++ b/arch/c6x/lib/llshl.S
@@ -0,0 +1,37 @@
+;; Copyright (C) 2010 Texas Instruments Incorporated
+;; Contributed by Mark Salter <msalter@redhat.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+;; uint64_t __c6xabi_llshl(uint64_t val, uint shift)
+
+#include <linux/linkage.h>
+
+ .text
+ENTRY(__c6xabi_llshl)
+ mv .l1x B4,A1
+ [!A1] b .s2 B3 ; just return if zero shift
+ mvk .s1 32,A0
+ sub .d1 A0,A1,A0
+ cmplt .l1 0,A0,A2
+ [A2] shru .s1 A4,A0,A0
+ [!A2] neg .l1 A0,A5
+|| [A2] shl .s1 A5,A1,A5
+ [!A2] shl .s1 A4,A5,A5
+|| [A2] or .d1 A5,A0,A5
+|| [!A2] mvk .l1 0,A4
+ [A2] shl .s1 A4,A1,A4
+ bnop .s2 B3,5
+ENDPROC(__c6xabi_llshl)
diff --git a/arch/c6x/lib/llshr.S b/arch/c6x/lib/llshr.S
new file mode 100644
index 00000000000..fde1bec7cf5
--- /dev/null
+++ b/arch/c6x/lib/llshr.S
@@ -0,0 +1,38 @@
+;; Copyright (C) 2010 Texas Instruments Incorporated
+;; Contributed by Mark Salter <msalter@redhat.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+;; uint64_t __c6xabi_llshr(uint64_t val, uint shift)
+
+#include <linux/linkage.h>
+
+ .text
+ENTRY(__c6xabi_llshr)
+ mv .l1x B4,A1
+ [!A1] b .s2 B3 ; return if zero shift count
+ mvk .s1 32,A0
+ sub .d1 A0,A1,A0
+ cmplt .l1 0,A0,A2
+ [A2] shl .s1 A5,A0,A0
+ nop
+ [!A2] neg .l1 A0,A4
+|| [A2] shru .s1 A4,A1,A4
+ [!A2] shr .s1 A5,A4,A4
+|| [A2] or .d1 A4,A0,A4
+ [!A2] shr .s1 A5,0x1f,A5
+ [A2] shr .s1 A5,A1,A5
+ bnop .s2 B3,5
+ENDPROC(__c6xabi_llshr)
diff --git a/arch/c6x/lib/llshru.S b/arch/c6x/lib/llshru.S
new file mode 100644
index 00000000000..596ae3ff5c0
--- /dev/null
+++ b/arch/c6x/lib/llshru.S
@@ -0,0 +1,38 @@
+;; Copyright (C) 2010 Texas Instruments Incorporated
+;; Contributed by Mark Salter <msalter@redhat.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+;; uint64_t __c6xabi_llshru(uint64_t val, uint shift)
+
+#include <linux/linkage.h>
+
+ .text
+ENTRY(__c6xabi_llshru)
+ mv .l1x B4,A1
+ [!A1] b .s2 B3 ; return if zero shift count
+ mvk .s1 32,A0
+ sub .d1 A0,A1,A0
+ cmplt .l1 0,A0,A2
+ [A2] shl .s1 A5,A0,A0
+ nop
+ [!A2] neg .l1 A0,A4
+|| [A2] shru .s1 A4,A1,A4
+ [!A2] shru .s1 A5,A4,A4
+|| [A2] or .d1 A4,A0,A4
+|| [!A2] mvk .l1 0,A5
+ [A2] shru .s1 A5,A1,A5
+ bnop .s2 B3,5
+ENDPROC(__c6xabi_llshru)
diff --git a/arch/c6x/lib/memcpy_64plus.S b/arch/c6x/lib/memcpy_64plus.S
new file mode 100644
index 00000000000..0bbc2cbf931
--- /dev/null
+++ b/arch/c6x/lib/memcpy_64plus.S
@@ -0,0 +1,46 @@
+; Port on Texas Instruments TMS320C6x architecture
+;
+; Copyright (C) 2006, 2009, 2010 Texas Instruments Incorporated
+; Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License version 2 as
+; published by the Free Software Foundation.
+;
+
+#include <linux/linkage.h>
+
+ .text
+
+ENTRY(memcpy)
+ AND .L1 0x1,A6,A0
+ || AND .S1 0x2,A6,A1
+ || AND .L2X 0x4,A6,B0
+ || MV .D1 A4,A3
+ || MVC .S2 ILC,B2
+
+ [A0] LDB .D2T1 *B4++,A5
+ [A1] LDB .D2T1 *B4++,A7
+ [A1] LDB .D2T1 *B4++,A8
+ [B0] LDNW .D2T1 *B4++,A9
+ || SHRU .S2X A6,0x3,B1
+ [!B1] BNOP .S2 B3,1
+
+ [A0] STB .D1T1 A5,*A3++
+ ||[B1] MVC .S2 B1,ILC
+ [A1] STB .D1T1 A7,*A3++
+ [A1] STB .D1T1 A8,*A3++
+ [B0] STNW .D1T1 A9,*A3++ ; return when len < 8
+
+ SPLOOP 2
+
+ LDNDW .D2T1 *B4++,A9:A8
+ NOP 3
+
+ NOP
+ SPKERNEL 0,0
+ || STNDW .D1T1 A9:A8,*A3++
+
+ BNOP .S2 B3,4
+ MVC .S2 B2,ILC
+ENDPROC(memcpy)
diff --git a/arch/c6x/lib/mpyll.S b/arch/c6x/lib/mpyll.S
new file mode 100644
index 00000000000..f1034418b4d
--- /dev/null
+++ b/arch/c6x/lib/mpyll.S
@@ -0,0 +1,49 @@
+;; Copyright (C) 2010 Texas Instruments Incorporated
+;; Contributed by Mark Salter <msalter@redhat.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ ;; uint64_t __c6xabi_mpyll(uint64_t x, uint64_t y)
+ ;;
+ ;; 64x64 multiply
+ ;; First compute partial results using 32-bit parts of x and y:
+ ;;
+ ;; b63 b32 b31 b0
+ ;; -----------------------------
+ ;; | 1 | 0 |
+ ;; -----------------------------
+ ;;
+ ;; P0 = X0*Y0
+ ;; P1 = X0*Y1 + X1*Y0
+ ;; P2 = X1*Y1
+ ;;
+ ;; result = (P2 << 64) + (P1 << 32) + P0
+ ;;
+ ;; Since the result is also 64-bit, we can skip the P2 term.
+
+ .text
+ENTRY(__c6xabi_mpyll)
+ mpy32u .m1x A4,B4,A1:A0 ; X0*Y0
+ b .s2 B3
+ || mpy32u .m2x B5,A4,B1:B0 ; X0*Y1 (don't need upper 32-bits)
+ || mpy32u .m1x A5,B4,A3:A2 ; X1*Y0 (don't need upper 32-bits)
+ nop
+ nop
+ mv .s1 A0,A4
+ add .l1x A2,B0,A5
+ add .s1 A1,A5,A5
+ENDPROC(__c6xabi_mpyll)
diff --git a/arch/c6x/lib/negll.S b/arch/c6x/lib/negll.S
new file mode 100644
index 00000000000..82f4bcec9af
--- /dev/null
+++ b/arch/c6x/lib/negll.S
@@ -0,0 +1,31 @@
+;; Copyright (C) 2010 Texas Instruments Incorporated
+;; Contributed by Mark Salter <msalter@redhat.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+;; int64_t __c6xabi_negll(int64_t val)
+
+#include <linux/linkage.h>
+
+ .text
+ENTRY(__c6xabi_negll)
+ b .s2 B3
+ mvk .l1 0,A0
+ subu .l1 A0,A4,A3:A2
+ sub .l1 A0,A5,A0
+|| ext .s1 A3,24,24,A5
+ add .l1 A5,A0,A5
+ mv .s1 A2,A4
+ENDPROC(__c6xabi_negll)
diff --git a/arch/c6x/lib/pop_rts.S b/arch/c6x/lib/pop_rts.S
new file mode 100644
index 00000000000..d7d96c70e9e
--- /dev/null
+++ b/arch/c6x/lib/pop_rts.S
@@ -0,0 +1,32 @@
+;; Copyright 2010 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ .text
+
+ENTRY(__c6xabi_pop_rts)
+ lddw .d2t2 *++B15, B3:B2
+ lddw .d2t1 *++B15, A11:A10
+ lddw .d2t2 *++B15, B11:B10
+ lddw .d2t1 *++B15, A13:A12
+ lddw .d2t2 *++B15, B13:B12
+ lddw .d2t1 *++B15, A15:A14
+|| b .s2 B3
+ ldw .d2t2 *++B15[2], B14
+ nop 4
+ENDPROC(__c6xabi_pop_rts)
diff --git a/arch/c6x/lib/push_rts.S b/arch/c6x/lib/push_rts.S
new file mode 100644
index 00000000000..f6e3db3b606
--- /dev/null
+++ b/arch/c6x/lib/push_rts.S
@@ -0,0 +1,31 @@
+;; Copyright 2010 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ .text
+
+ENTRY(__c6xabi_push_rts)
+ stw .d2t2 B14, *B15--[2]
+ stdw .d2t1 A15:A14, *B15--
+|| b .s2x A3
+ stdw .d2t2 B13:B12, *B15--
+ stdw .d2t1 A13:A12, *B15--
+ stdw .d2t2 B11:B10, *B15--
+ stdw .d2t1 A11:A10, *B15--
+ stdw .d2t2 B3:B2, *B15--
+ENDPROC(__c6xabi_push_rts)
diff --git a/arch/c6x/lib/remi.S b/arch/c6x/lib/remi.S
new file mode 100644
index 00000000000..6f2ca18c3f9
--- /dev/null
+++ b/arch/c6x/lib/remi.S
@@ -0,0 +1,64 @@
+;; Copyright 2010 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ ;; ABI considerations for the divide functions
+ ;; The following registers are call-used:
+ ;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5
+ ;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4
+ ;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4
+ ;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4
+ ;;
+ ;; In our implementation, divu and remu are leaf functions,
+ ;; while both divi and remi call into divu.
+ ;; A0 is not clobbered by any of the functions.
+ ;; divu does not clobber B2 either, which is taken advantage of
+ ;; in remi.
+ ;; divi uses B5 to hold the original return address during
+ ;; the call to divu.
+ ;; remi uses B2 and A5 to hold the input values during the
+ ;; call to divu. It stores B3 in on the stack.
+
+ .text
+
+ENTRY(__c6xabi_remi)
+ stw .d2t2 B3, *B15--[2]
+|| cmpgt .l1 0, A4, A1
+|| cmpgt .l2 0, B4, B2
+|| mv .s1 A4, A5
+|| call .s2 __c6xabi_divu
+
+ [A1] neg .l1 A4, A4
+|| [B2] neg .l2 B4, B4
+|| xor .s2x B2, A1, B0
+|| mv .d2 B4, B2
+
+ [B0] addkpc .s2 _divu_ret_1, B3, 1
+ [!B0] addkpc .s2 _divu_ret_2, B3, 1
+ nop 2
+_divu_ret_1:
+ neg .l1 A4, A4
+_divu_ret_2:
+ ldw .d2t2 *++B15[2], B3
+
+ mpy32 .m1x A4, B2, A6
+ nop 3
+ ret .s2 B3
+ sub .l1 A5, A6, A4
+ nop 4
+ENDPROC(__c6xabi_remi)
diff --git a/arch/c6x/lib/remu.S b/arch/c6x/lib/remu.S
new file mode 100644
index 00000000000..3fae719185a
--- /dev/null
+++ b/arch/c6x/lib/remu.S
@@ -0,0 +1,82 @@
+;; Copyright 2010 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ ;; ABI considerations for the divide functions
+ ;; The following registers are call-used:
+ ;; __c6xabi_divi A0,A1,A2,A4,A6,B0,B1,B2,B4,B5
+ ;; __c6xabi_divu A0,A1,A2,A4,A6,B0,B1,B2,B4
+ ;; __c6xabi_remi A1,A2,A4,A5,A6,B0,B1,B2,B4
+ ;; __c6xabi_remu A1,A4,A5,A7,B0,B1,B2,B4
+ ;;
+ ;; In our implementation, divu and remu are leaf functions,
+ ;; while both divi and remi call into divu.
+ ;; A0 is not clobbered by any of the functions.
+ ;; divu does not clobber B2 either, which is taken advantage of
+ ;; in remi.
+ ;; divi uses B5 to hold the original return address during
+ ;; the call to divu.
+ ;; remi uses B2 and A5 to hold the input values during the
+ ;; call to divu. It stores B3 in on the stack.
+
+
+ .text
+
+ENTRY(__c6xabi_remu)
+ ;; The ABI seems designed to prevent these functions calling each other,
+ ;; so we duplicate most of the divsi3 code here.
+ mv .s2x A4, B1
+ lmbd .l2 1, B4, B1
+|| [!B1] b .s2 B3 ; RETURN A
+|| [!B1] mvk .d2 1, B4
+
+ mv .l1x B1, A7
+|| shl .s2 B4, B1, B4
+
+ cmpltu .l1x A4, B4, A1
+ [!A1] sub .l1x A4, B4, A4
+ shru .s2 B4, 1, B4
+
+_remu_loop:
+ cmpgt .l2 B1, 7, B0
+|| [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ ;; RETURN A may happen here (note: must happen before the next branch)
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+|| [B0] b .s1 _remu_loop
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ ;; loop backwards branch happens here
+
+ ret .s2 B3
+ [B1] subc .l1x A4,B4,A4
+|| [B1] add .s2 -1, B1, B1
+ [B1] subc .l1x A4,B4,A4
+
+ extu .s1 A4, A7, A4
+ nop 2
+ENDPROC(__c6xabi_remu)
diff --git a/arch/c6x/lib/strasgi.S b/arch/c6x/lib/strasgi.S
new file mode 100644
index 00000000000..de274076553
--- /dev/null
+++ b/arch/c6x/lib/strasgi.S
@@ -0,0 +1,89 @@
+;; Copyright 2010 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ .text
+
+ENTRY(__c6xabi_strasgi)
+ ;; This is essentially memcpy, with alignment known to be at least
+ ;; 4, and the size a multiple of 4 greater than or equal to 28.
+ ldw .d2t1 *B4++, A0
+|| mvk .s2 16, B1
+ ldw .d2t1 *B4++, A1
+|| mvk .s2 20, B2
+|| sub .d1 A6, 24, A6
+ ldw .d2t1 *B4++, A5
+ ldw .d2t1 *B4++, A7
+|| mv .l2x A6, B7
+ ldw .d2t1 *B4++, A8
+ ldw .d2t1 *B4++, A9
+|| mv .s2x A0, B5
+|| cmpltu .l2 B2, B7, B0
+
+_strasgi_loop:
+ stw .d1t2 B5, *A4++
+|| [B0] ldw .d2t1 *B4++, A0
+|| mv .s2x A1, B5
+|| mv .l2 B7, B6
+
+ [B0] sub .d2 B6, 24, B7
+|| [B0] b .s2 _strasgi_loop
+|| cmpltu .l2 B1, B6, B0
+
+ [B0] ldw .d2t1 *B4++, A1
+|| stw .d1t2 B5, *A4++
+|| mv .s2x A5, B5
+|| cmpltu .l2 12, B6, B0
+
+ [B0] ldw .d2t1 *B4++, A5
+|| stw .d1t2 B5, *A4++
+|| mv .s2x A7, B5
+|| cmpltu .l2 8, B6, B0
+
+ [B0] ldw .d2t1 *B4++, A7
+|| stw .d1t2 B5, *A4++
+|| mv .s2x A8, B5
+|| cmpltu .l2 4, B6, B0
+
+ [B0] ldw .d2t1 *B4++, A8
+|| stw .d1t2 B5, *A4++
+|| mv .s2x A9, B5
+|| cmpltu .l2 0, B6, B0
+
+ [B0] ldw .d2t1 *B4++, A9
+|| stw .d1t2 B5, *A4++
+|| mv .s2x A0, B5
+|| cmpltu .l2 B2, B7, B0
+
+ ;; loop back branch happens here
+
+ cmpltu .l2 B1, B6, B0
+|| ret .s2 b3
+
+ [B0] stw .d1t1 A1, *A4++
+|| cmpltu .l2 12, B6, B0
+ [B0] stw .d1t1 A5, *A4++
+|| cmpltu .l2 8, B6, B0
+ [B0] stw .d1t1 A7, *A4++
+|| cmpltu .l2 4, B6, B0
+ [B0] stw .d1t1 A8, *A4++
+|| cmpltu .l2 0, B6, B0
+ [B0] stw .d1t1 A9, *A4++
+
+ ;; return happens here
+ENDPROC(__c6xabi_strasgi)
diff --git a/arch/c6x/lib/strasgi_64plus.S b/arch/c6x/lib/strasgi_64plus.S
new file mode 100644
index 00000000000..c9fd159b5fa
--- /dev/null
+++ b/arch/c6x/lib/strasgi_64plus.S
@@ -0,0 +1,39 @@
+;; Copyright 2010 Free Software Foundation, Inc.
+;; Contributed by Bernd Schmidt <bernds@codesourcery.com>.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program; if not, write to the Free Software
+;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <linux/linkage.h>
+
+ .text
+
+ENTRY(__c6xabi_strasgi_64plus)
+ shru .s2x a6, 2, b31
+|| mv .s1 a4, a30
+|| mv .d2 b4, b30
+
+ add .s2 -4, b31, b31
+
+ sploopd 1
+|| mvc .s2 b31, ilc
+ ldw .d2t2 *b30++, b31
+ nop 4
+ mv .s1x b31,a31
+ spkernel 6, 0
+|| stw .d1t1 a31, *a30++
+
+ ret .s2 b3
+ nop 5
+ENDPROC(__c6xabi_strasgi_64plus)
diff --git a/arch/c6x/mm/Makefile b/arch/c6x/mm/Makefile
new file mode 100644
index 00000000000..136a97576c6
--- /dev/null
+++ b/arch/c6x/mm/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the linux c6x-specific parts of the memory manager.
+#
+
+obj-y := init.o dma-coherent.o
diff --git a/arch/c6x/mm/dma-coherent.c b/arch/c6x/mm/dma-coherent.c
new file mode 100644
index 00000000000..4187e518037
--- /dev/null
+++ b/arch/c6x/mm/dma-coherent.c
@@ -0,0 +1,143 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * DMA uncached mapping support.
+ *
+ * Using code pulled from ARM
+ * Copyright (C) 2000-2004 Russell King
+ *
+ */
+#include <linux/slab.h>
+#include <linux/bitmap.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/memblock.h>
+
+#include <asm/page.h>
+
+/*
+ * DMA coherent memory management, can be redefined using the memdma=
+ * kernel command line
+ */
+
+/* none by default */
+static phys_addr_t dma_base;
+static u32 dma_size;
+static u32 dma_pages;
+
+static unsigned long *dma_bitmap;
+
+/* bitmap lock */
+static DEFINE_SPINLOCK(dma_lock);
+
+/*
+ * Return a DMA coherent and contiguous memory chunk from the DMA memory
+ */
+static inline u32 __alloc_dma_pages(int order)
+{
+ unsigned long flags;
+ u32 pos;
+
+ spin_lock_irqsave(&dma_lock, flags);
+ pos = bitmap_find_free_region(dma_bitmap, dma_pages, order);
+ spin_unlock_irqrestore(&dma_lock, flags);
+
+ return dma_base + (pos << PAGE_SHIFT);
+}
+
+static void __free_dma_pages(u32 addr, int order)
+{
+ unsigned long flags;
+ u32 pos = (addr - dma_base) >> PAGE_SHIFT;
+
+ if (addr < dma_base || (pos + (1 << order)) >= dma_pages) {
+ printk(KERN_ERR "%s: freeing outside range.\n", __func__);
+ BUG();
+ }
+
+ spin_lock_irqsave(&dma_lock, flags);
+ bitmap_release_region(dma_bitmap, pos, order);
+ spin_unlock_irqrestore(&dma_lock, flags);
+}
+
+/*
+ * Allocate DMA coherent memory space and return both the kernel
+ * virtual and DMA address for that space.
+ */
+void *dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *handle, gfp_t gfp)
+{
+ u32 paddr;
+ int order;
+
+ if (!dma_size || !size)
+ return NULL;
+
+ order = get_count_order(((size - 1) >> PAGE_SHIFT) + 1);
+
+ paddr = __alloc_dma_pages(order);
+
+ if (handle)
+ *handle = paddr;
+
+ if (!paddr)
+ return NULL;
+
+ return phys_to_virt(paddr);
+}
+EXPORT_SYMBOL(dma_alloc_coherent);
+
+/*
+ * Free DMA coherent memory as defined by the above mapping.
+ */
+void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle)
+{
+ int order;
+
+ if (!dma_size || !size)
+ return;
+
+ order = get_count_order(((size - 1) >> PAGE_SHIFT) + 1);
+
+ __free_dma_pages(virt_to_phys(vaddr), order);
+}
+EXPORT_SYMBOL(dma_free_coherent);
+
+/*
+ * Initialise the coherent DMA memory allocator using the given uncached region.
+ */
+void __init coherent_mem_init(phys_addr_t start, u32 size)
+{
+ phys_addr_t bitmap_phys;
+
+ if (!size)
+ return;
+
+ printk(KERN_INFO
+ "Coherent memory (DMA) region start=0x%x size=0x%x\n",
+ start, size);
+
+ dma_base = start;
+ dma_size = size;
+
+ /* allocate bitmap */
+ dma_pages = dma_size >> PAGE_SHIFT;
+ if (dma_size & (PAGE_SIZE - 1))
+ ++dma_pages;
+
+ bitmap_phys = memblock_alloc(BITS_TO_LONGS(dma_pages) * sizeof(long),
+ sizeof(long));
+
+ dma_bitmap = phys_to_virt(bitmap_phys);
+ memset(dma_bitmap, 0, dma_pages * PAGE_SIZE);
+}
diff --git a/arch/c6x/mm/init.c b/arch/c6x/mm/init.c
new file mode 100644
index 00000000000..89395f09648
--- /dev/null
+++ b/arch/c6x/mm/init.c
@@ -0,0 +1,113 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
+ * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/module.h>
+#include <linux/bootmem.h>
+#ifdef CONFIG_BLK_DEV_RAM
+#include <linux/blkdev.h>
+#endif
+#include <linux/initrd.h>
+
+#include <asm/sections.h>
+
+/*
+ * ZERO_PAGE is a special page that is used for zero-initialized
+ * data and COW.
+ */
+unsigned long empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
+
+/*
+ * paging_init() continues the virtual memory environment setup which
+ * was begun by the code in arch/head.S.
+ * The parameters are pointers to where to stick the starting and ending
+ * addresses of available kernel virtual memory.
+ */
+void __init paging_init(void)
+{
+ struct pglist_data *pgdat = NODE_DATA(0);
+ unsigned long zones_size[MAX_NR_ZONES] = {0, };
+
+ empty_zero_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
+ memset((void *)empty_zero_page, 0, PAGE_SIZE);
+
+ /*
+ * Set up user data space
+ */
+ set_fs(KERNEL_DS);
+
+ /*
+ * Define zones
+ */
+ zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
+ pgdat->node_zones[ZONE_NORMAL].zone_start_pfn =
+ __pa(PAGE_OFFSET) >> PAGE_SHIFT;
+
+ free_area_init(zones_size);
+}
+
+void __init mem_init(void)
+{
+ int codek, datak;
+ unsigned long tmp;
+ unsigned long len = memory_end - memory_start;
+
+ high_memory = (void *)(memory_end & PAGE_MASK);
+
+ /* this will put all memory onto the freelists */
+ totalram_pages = free_all_bootmem();
+
+ codek = (_etext - _stext) >> 10;
+ datak = (_end - _sdata) >> 10;
+
+ tmp = nr_free_pages() << PAGE_SHIFT;
+ printk(KERN_INFO "Memory: %luk/%luk RAM (%dk kernel code, %dk data)\n",
+ tmp >> 10, len >> 10, codek, datak);
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void __init free_initrd_mem(unsigned long start, unsigned long end)
+{
+ int pages = 0;
+ for (; start < end; start += PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(start));
+ init_page_count(virt_to_page(start));
+ free_page(start);
+ totalram_pages++;
+ pages++;
+ }
+ printk(KERN_INFO "Freeing initrd memory: %luk freed\n",
+ (pages * PAGE_SIZE) >> 10);
+}
+#endif
+
+void __init free_initmem(void)
+{
+ unsigned long addr;
+
+ /*
+ * The following code should be cool even if these sections
+ * are not page aligned.
+ */
+ addr = PAGE_ALIGN((unsigned long)(__init_begin));
+
+ /* next to check that the page we free is not a partial page */
+ for (; addr + PAGE_SIZE < (unsigned long)(__init_end);
+ addr += PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(addr));
+ init_page_count(virt_to_page(addr));
+ free_page(addr);
+ totalram_pages++;
+ }
+ printk(KERN_INFO "Freeing unused kernel memory: %dK freed\n",
+ (int) ((addr - PAGE_ALIGN((long) &__init_begin)) >> 10));
+}
diff --git a/arch/c6x/platforms/Kconfig b/arch/c6x/platforms/Kconfig
new file mode 100644
index 00000000000..401ee678fd0
--- /dev/null
+++ b/arch/c6x/platforms/Kconfig
@@ -0,0 +1,16 @@
+
+config SOC_TMS320C6455
+ bool "TMS320C6455"
+ default n
+
+config SOC_TMS320C6457
+ bool "TMS320C6457"
+ default n
+
+config SOC_TMS320C6472
+ bool "TMS320C6472"
+ default n
+
+config SOC_TMS320C6474
+ bool "TMS320C6474"
+ default n
diff --git a/arch/c6x/platforms/Makefile b/arch/c6x/platforms/Makefile
new file mode 100644
index 00000000000..9a95b9bca8d
--- /dev/null
+++ b/arch/c6x/platforms/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for arch/c6x/platforms
+#
+# Copyright 2010, 2011 Texas Instruments Incorporated
+#
+
+obj-y = platform.o cache.o megamod-pic.o pll.o plldata.o timer64.o
+obj-y += dscr.o
+
+# SoC objects
+obj-$(CONFIG_SOC_TMS320C6455) += emif.o
+obj-$(CONFIG_SOC_TMS320C6457) += emif.o
diff --git a/arch/c6x/platforms/cache.c b/arch/c6x/platforms/cache.c
new file mode 100644
index 00000000000..86318a16a25
--- /dev/null
+++ b/arch/c6x/platforms/cache.c
@@ -0,0 +1,445 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+
+#include <asm/cache.h>
+#include <asm/soc.h>
+
+/*
+ * Internal Memory Control Registers for caches
+ */
+#define IMCR_CCFG 0x0000
+#define IMCR_L1PCFG 0x0020
+#define IMCR_L1PCC 0x0024
+#define IMCR_L1DCFG 0x0040
+#define IMCR_L1DCC 0x0044
+#define IMCR_L2ALLOC0 0x2000
+#define IMCR_L2ALLOC1 0x2004
+#define IMCR_L2ALLOC2 0x2008
+#define IMCR_L2ALLOC3 0x200c
+#define IMCR_L2WBAR 0x4000
+#define IMCR_L2WWC 0x4004
+#define IMCR_L2WIBAR 0x4010
+#define IMCR_L2WIWC 0x4014
+#define IMCR_L2IBAR 0x4018
+#define IMCR_L2IWC 0x401c
+#define IMCR_L1PIBAR 0x4020
+#define IMCR_L1PIWC 0x4024
+#define IMCR_L1DWIBAR 0x4030
+#define IMCR_L1DWIWC 0x4034
+#define IMCR_L1DWBAR 0x4040
+#define IMCR_L1DWWC 0x4044
+#define IMCR_L1DIBAR 0x4048
+#define IMCR_L1DIWC 0x404c
+#define IMCR_L2WB 0x5000
+#define IMCR_L2WBINV 0x5004
+#define IMCR_L2INV 0x5008
+#define IMCR_L1PINV 0x5028
+#define IMCR_L1DWB 0x5040
+#define IMCR_L1DWBINV 0x5044
+#define IMCR_L1DINV 0x5048
+#define IMCR_MAR_BASE 0x8000
+#define IMCR_MAR96_111 0x8180
+#define IMCR_MAR128_191 0x8200
+#define IMCR_MAR224_239 0x8380
+#define IMCR_L2MPFAR 0xa000
+#define IMCR_L2MPFSR 0xa004
+#define IMCR_L2MPFCR 0xa008
+#define IMCR_L2MPLK0 0xa100
+#define IMCR_L2MPLK1 0xa104
+#define IMCR_L2MPLK2 0xa108
+#define IMCR_L2MPLK3 0xa10c
+#define IMCR_L2MPLKCMD 0xa110
+#define IMCR_L2MPLKSTAT 0xa114
+#define IMCR_L2MPPA_BASE 0xa200
+#define IMCR_L1PMPFAR 0xa400
+#define IMCR_L1PMPFSR 0xa404
+#define IMCR_L1PMPFCR 0xa408
+#define IMCR_L1PMPLK0 0xa500
+#define IMCR_L1PMPLK1 0xa504
+#define IMCR_L1PMPLK2 0xa508
+#define IMCR_L1PMPLK3 0xa50c
+#define IMCR_L1PMPLKCMD 0xa510
+#define IMCR_L1PMPLKSTAT 0xa514
+#define IMCR_L1PMPPA_BASE 0xa600
+#define IMCR_L1DMPFAR 0xac00
+#define IMCR_L1DMPFSR 0xac04
+#define IMCR_L1DMPFCR 0xac08
+#define IMCR_L1DMPLK0 0xad00
+#define IMCR_L1DMPLK1 0xad04
+#define IMCR_L1DMPLK2 0xad08
+#define IMCR_L1DMPLK3 0xad0c
+#define IMCR_L1DMPLKCMD 0xad10
+#define IMCR_L1DMPLKSTAT 0xad14
+#define IMCR_L1DMPPA_BASE 0xae00
+#define IMCR_L2PDWAKE0 0xc040
+#define IMCR_L2PDWAKE1 0xc044
+#define IMCR_L2PDSLEEP0 0xc050
+#define IMCR_L2PDSLEEP1 0xc054
+#define IMCR_L2PDSTAT0 0xc060
+#define IMCR_L2PDSTAT1 0xc064
+
+/*
+ * CCFG register values and bits
+ */
+#define L2MODE_0K_CACHE 0x0
+#define L2MODE_32K_CACHE 0x1
+#define L2MODE_64K_CACHE 0x2
+#define L2MODE_128K_CACHE 0x3
+#define L2MODE_256K_CACHE 0x7
+
+#define L2PRIO_URGENT 0x0
+#define L2PRIO_HIGH 0x1
+#define L2PRIO_MEDIUM 0x2
+#define L2PRIO_LOW 0x3
+
+#define CCFG_ID 0x100 /* Invalidate L1P bit */
+#define CCFG_IP 0x200 /* Invalidate L1D bit */
+
+static void __iomem *cache_base;
+
+/*
+ * L1 & L2 caches generic functions
+ */
+#define imcr_get(reg) soc_readl(cache_base + (reg))
+#define imcr_set(reg, value) \
+do { \
+ soc_writel((value), cache_base + (reg)); \
+ soc_readl(cache_base + (reg)); \
+} while (0)
+
+static void cache_block_operation_wait(unsigned int wc_reg)
+{
+ /* Wait for completion */
+ while (imcr_get(wc_reg))
+ cpu_relax();
+}
+
+static DEFINE_SPINLOCK(cache_lock);
+
+/*
+ * Generic function to perform a block cache operation as
+ * invalidate or writeback/invalidate
+ */
+static void cache_block_operation(unsigned int *start,
+ unsigned int *end,
+ unsigned int bar_reg,
+ unsigned int wc_reg)
+{
+ unsigned long flags;
+ unsigned int wcnt =
+ (L2_CACHE_ALIGN_CNT((unsigned int) end)
+ - L2_CACHE_ALIGN_LOW((unsigned int) start)) >> 2;
+ unsigned int wc = 0;
+
+ for (; wcnt; wcnt -= wc, start += wc) {
+loop:
+ spin_lock_irqsave(&cache_lock, flags);
+
+ /*
+ * If another cache operation is occuring
+ */
+ if (unlikely(imcr_get(wc_reg))) {
+ spin_unlock_irqrestore(&cache_lock, flags);
+
+ /* Wait for previous operation completion */
+ cache_block_operation_wait(wc_reg);
+
+ /* Try again */
+ goto loop;
+ }
+
+ imcr_set(bar_reg, L2_CACHE_ALIGN_LOW((unsigned int) start));
+
+ if (wcnt > 0xffff)
+ wc = 0xffff;
+ else
+ wc = wcnt;
+
+ /* Set word count value in the WC register */
+ imcr_set(wc_reg, wc & 0xffff);
+
+ spin_unlock_irqrestore(&cache_lock, flags);
+
+ /* Wait for completion */
+ cache_block_operation_wait(wc_reg);
+ }
+}
+
+static void cache_block_operation_nowait(unsigned int *start,
+ unsigned int *end,
+ unsigned int bar_reg,
+ unsigned int wc_reg)
+{
+ unsigned long flags;
+ unsigned int wcnt =
+ (L2_CACHE_ALIGN_CNT((unsigned int) end)
+ - L2_CACHE_ALIGN_LOW((unsigned int) start)) >> 2;
+ unsigned int wc = 0;
+
+ for (; wcnt; wcnt -= wc, start += wc) {
+
+ spin_lock_irqsave(&cache_lock, flags);
+
+ imcr_set(bar_reg, L2_CACHE_ALIGN_LOW((unsigned int) start));
+
+ if (wcnt > 0xffff)
+ wc = 0xffff;
+ else
+ wc = wcnt;
+
+ /* Set word count value in the WC register */
+ imcr_set(wc_reg, wc & 0xffff);
+
+ spin_unlock_irqrestore(&cache_lock, flags);
+
+ /* Don't wait for completion on last cache operation */
+ if (wcnt > 0xffff)
+ cache_block_operation_wait(wc_reg);
+ }
+}
+
+/*
+ * L1 caches management
+ */
+
+/*
+ * Disable L1 caches
+ */
+void L1_cache_off(void)
+{
+ unsigned int dummy;
+
+ imcr_set(IMCR_L1PCFG, 0);
+ dummy = imcr_get(IMCR_L1PCFG);
+
+ imcr_set(IMCR_L1DCFG, 0);
+ dummy = imcr_get(IMCR_L1DCFG);
+}
+
+/*
+ * Enable L1 caches
+ */
+void L1_cache_on(void)
+{
+ unsigned int dummy;
+
+ imcr_set(IMCR_L1PCFG, 7);
+ dummy = imcr_get(IMCR_L1PCFG);
+
+ imcr_set(IMCR_L1DCFG, 7);
+ dummy = imcr_get(IMCR_L1DCFG);
+}
+
+/*
+ * L1P global-invalidate all
+ */
+void L1P_cache_global_invalidate(void)
+{
+ unsigned int set = 1;
+ imcr_set(IMCR_L1PINV, set);
+ while (imcr_get(IMCR_L1PINV) & 1)
+ cpu_relax();
+}
+
+/*
+ * L1D global-invalidate all
+ *
+ * Warning: this operation causes all updated data in L1D to
+ * be discarded rather than written back to the lower levels of
+ * memory
+ */
+void L1D_cache_global_invalidate(void)
+{
+ unsigned int set = 1;
+ imcr_set(IMCR_L1DINV, set);
+ while (imcr_get(IMCR_L1DINV) & 1)
+ cpu_relax();
+}
+
+void L1D_cache_global_writeback(void)
+{
+ unsigned int set = 1;
+ imcr_set(IMCR_L1DWB, set);
+ while (imcr_get(IMCR_L1DWB) & 1)
+ cpu_relax();
+}
+
+void L1D_cache_global_writeback_invalidate(void)
+{
+ unsigned int set = 1;
+ imcr_set(IMCR_L1DWBINV, set);
+ while (imcr_get(IMCR_L1DWBINV) & 1)
+ cpu_relax();
+}
+
+/*
+ * L2 caches management
+ */
+
+/*
+ * Set L2 operation mode
+ */
+void L2_cache_set_mode(unsigned int mode)
+{
+ unsigned int ccfg = imcr_get(IMCR_CCFG);
+
+ /* Clear and set the L2MODE bits in CCFG */
+ ccfg &= ~7;
+ ccfg |= (mode & 7);
+ imcr_set(IMCR_CCFG, ccfg);
+ ccfg = imcr_get(IMCR_CCFG);
+}
+
+/*
+ * L2 global-writeback and global-invalidate all
+ */
+void L2_cache_global_writeback_invalidate(void)
+{
+ imcr_set(IMCR_L2WBINV, 1);
+ while (imcr_get(IMCR_L2WBINV))
+ cpu_relax();
+}
+
+/*
+ * L2 global-writeback all
+ */
+void L2_cache_global_writeback(void)
+{
+ imcr_set(IMCR_L2WB, 1);
+ while (imcr_get(IMCR_L2WB))
+ cpu_relax();
+}
+
+/*
+ * Cacheability controls
+ */
+void enable_caching(unsigned long start, unsigned long end)
+{
+ unsigned int mar = IMCR_MAR_BASE + ((start >> 24) << 2);
+ unsigned int mar_e = IMCR_MAR_BASE + ((end >> 24) << 2);
+
+ for (; mar <= mar_e; mar += 4)
+ imcr_set(mar, imcr_get(mar) | 1);
+}
+
+void disable_caching(unsigned long start, unsigned long end)
+{
+ unsigned int mar = IMCR_MAR_BASE + ((start >> 24) << 2);
+ unsigned int mar_e = IMCR_MAR_BASE + ((end >> 24) << 2);
+
+ for (; mar <= mar_e; mar += 4)
+ imcr_set(mar, imcr_get(mar) & ~1);
+}
+
+
+/*
+ * L1 block operations
+ */
+void L1P_cache_block_invalidate(unsigned int start, unsigned int end)
+{
+ cache_block_operation((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L1PIBAR, IMCR_L1PIWC);
+}
+
+void L1D_cache_block_invalidate(unsigned int start, unsigned int end)
+{
+ cache_block_operation((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L1DIBAR, IMCR_L1DIWC);
+}
+
+void L1D_cache_block_writeback_invalidate(unsigned int start, unsigned int end)
+{
+ cache_block_operation((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L1DWIBAR, IMCR_L1DWIWC);
+}
+
+void L1D_cache_block_writeback(unsigned int start, unsigned int end)
+{
+ cache_block_operation((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L1DWBAR, IMCR_L1DWWC);
+}
+
+/*
+ * L2 block operations
+ */
+void L2_cache_block_invalidate(unsigned int start, unsigned int end)
+{
+ cache_block_operation((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L2IBAR, IMCR_L2IWC);
+}
+
+void L2_cache_block_writeback(unsigned int start, unsigned int end)
+{
+ cache_block_operation((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L2WBAR, IMCR_L2WWC);
+}
+
+void L2_cache_block_writeback_invalidate(unsigned int start, unsigned int end)
+{
+ cache_block_operation((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L2WIBAR, IMCR_L2WIWC);
+}
+
+void L2_cache_block_invalidate_nowait(unsigned int start, unsigned int end)
+{
+ cache_block_operation_nowait((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L2IBAR, IMCR_L2IWC);
+}
+
+void L2_cache_block_writeback_nowait(unsigned int start, unsigned int end)
+{
+ cache_block_operation_nowait((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L2WBAR, IMCR_L2WWC);
+}
+
+void L2_cache_block_writeback_invalidate_nowait(unsigned int start,
+ unsigned int end)
+{
+ cache_block_operation_nowait((unsigned int *) start,
+ (unsigned int *) end,
+ IMCR_L2WIBAR, IMCR_L2WIWC);
+}
+
+
+/*
+ * L1 and L2 caches configuration
+ */
+void __init c6x_cache_init(void)
+{
+ struct device_node *node;
+
+ node = of_find_compatible_node(NULL, NULL, "ti,c64x+cache");
+ if (!node)
+ return;
+
+ cache_base = of_iomap(node, 0);
+
+ of_node_put(node);
+
+ if (!cache_base)
+ return;
+
+ /* Set L2 caches on the the whole L2 SRAM memory */
+ L2_cache_set_mode(L2MODE_SIZE);
+
+ /* Enable L1 */
+ L1_cache_on();
+}
diff --git a/arch/c6x/platforms/dscr.c b/arch/c6x/platforms/dscr.c
new file mode 100644
index 00000000000..f848a65ee64
--- /dev/null
+++ b/arch/c6x/platforms/dscr.c
@@ -0,0 +1,598 @@
+/*
+ * Device State Control Registers driver
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * The Device State Control Registers (DSCR) provide SoC level control over
+ * a number of peripherals. Details vary considerably among the various SoC
+ * parts. In general, the DSCR block will provide one or more configuration
+ * registers often protected by a lock register. One or more key values must
+ * be written to a lock register in order to unlock the configuration register.
+ * The configuration register may be used to enable (and disable in some
+ * cases) SoC pin drivers, peripheral clock sources (internal or pin), etc.
+ * In some cases, a configuration register is write once or the individual
+ * bits are write once. That is, you may be able to enable a device, but
+ * will not be able to disable it.
+ *
+ * In addition to device configuration, the DSCR block may provide registers
+ * which are used to reset SoC peripherals, provide device ID information,
+ * provide MAC addresses, and other miscellaneous functions.
+ */
+
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <asm/soc.h>
+#include <asm/dscr.h>
+
+#define MAX_DEVSTATE_IDS 32
+#define MAX_DEVCTL_REGS 8
+#define MAX_DEVSTAT_REGS 8
+#define MAX_LOCKED_REGS 4
+#define MAX_SOC_EMACS 2
+
+struct rmii_reset_reg {
+ u32 reg;
+ u32 mask;
+};
+
+/*
+ * Some registerd may be locked. In order to write to these
+ * registers, the key value must first be written to the lockreg.
+ */
+struct locked_reg {
+ u32 reg; /* offset from base */
+ u32 lockreg; /* offset from base */
+ u32 key; /* unlock key */
+};
+
+/*
+ * This describes a contiguous area of like control bits used to enable/disable
+ * SoC devices. Each controllable device is given an ID which is used by the
+ * individual device drivers to control the device state. These IDs start at
+ * zero and are assigned sequentially to the control bitfield ranges described
+ * by this structure.
+ */
+struct devstate_ctl_reg {
+ u32 reg; /* register holding the control bits */
+ u8 start_id; /* start id of this range */
+ u8 num_ids; /* number of devices in this range */
+ u8 enable_only; /* bits are write-once to enable only */
+ u8 enable; /* value used to enable device */
+ u8 disable; /* value used to disable device */
+ u8 shift; /* starting (rightmost) bit in range */
+ u8 nbits; /* number of bits per device */
+};
+
+
+/*
+ * This describes a region of status bits indicating the state of
+ * various devices. This is used internally to wait for status
+ * change completion when enabling/disabling a device. Status is
+ * optional and not all device controls will have a corresponding
+ * status.
+ */
+struct devstate_stat_reg {
+ u32 reg; /* register holding the status bits */
+ u8 start_id; /* start id of this range */
+ u8 num_ids; /* number of devices in this range */
+ u8 enable; /* value indicating enabled state */
+ u8 disable; /* value indicating disabled state */
+ u8 shift; /* starting (rightmost) bit in range */
+ u8 nbits; /* number of bits per device */
+};
+
+struct devstate_info {
+ struct devstate_ctl_reg *ctl;
+ struct devstate_stat_reg *stat;
+};
+
+/* These are callbacks to SOC-specific code. */
+struct dscr_ops {
+ void (*init)(struct device_node *node);
+};
+
+struct dscr_regs {
+ spinlock_t lock;
+ void __iomem *base;
+ u32 kick_reg[2];
+ u32 kick_key[2];
+ struct locked_reg locked[MAX_LOCKED_REGS];
+ struct devstate_info devstate_info[MAX_DEVSTATE_IDS];
+ struct rmii_reset_reg rmii_resets[MAX_SOC_EMACS];
+ struct devstate_ctl_reg devctl[MAX_DEVCTL_REGS];
+ struct devstate_stat_reg devstat[MAX_DEVSTAT_REGS];
+};
+
+static struct dscr_regs dscr;
+
+static struct locked_reg *find_locked_reg(u32 reg)
+{
+ int i;
+
+ for (i = 0; i < MAX_LOCKED_REGS; i++)
+ if (dscr.locked[i].key && reg == dscr.locked[i].reg)
+ return &dscr.locked[i];
+ return NULL;
+}
+
+/*
+ * Write to a register with one lock
+ */
+static void dscr_write_locked1(u32 reg, u32 val,
+ u32 lock, u32 key)
+{
+ void __iomem *reg_addr = dscr.base + reg;
+ void __iomem *lock_addr = dscr.base + lock;
+
+ /*
+ * For some registers, the lock is relocked after a short number
+ * of cycles. We have to put the lock write and register write in
+ * the same fetch packet to meet this timing. The .align ensures
+ * the two stw instructions are in the same fetch packet.
+ */
+ asm volatile ("b .s2 0f\n"
+ "nop 5\n"
+ " .align 5\n"
+ "0:\n"
+ "stw .D1T2 %3,*%2\n"
+ "stw .D1T2 %1,*%0\n"
+ :
+ : "a"(reg_addr), "b"(val), "a"(lock_addr), "b"(key)
+ );
+
+ /* in case the hw doesn't reset the lock */
+ soc_writel(0, lock_addr);
+}
+
+/*
+ * Write to a register protected by two lock registers
+ */
+static void dscr_write_locked2(u32 reg, u32 val,
+ u32 lock0, u32 key0,
+ u32 lock1, u32 key1)
+{
+ soc_writel(key0, dscr.base + lock0);
+ soc_writel(key1, dscr.base + lock1);
+ soc_writel(val, dscr.base + reg);
+ soc_writel(0, dscr.base + lock0);
+ soc_writel(0, dscr.base + lock1);
+}
+
+static void dscr_write(u32 reg, u32 val)
+{
+ struct locked_reg *lock;
+
+ lock = find_locked_reg(reg);
+ if (lock)
+ dscr_write_locked1(reg, val, lock->lockreg, lock->key);
+ else if (dscr.kick_key[0])
+ dscr_write_locked2(reg, val, dscr.kick_reg[0], dscr.kick_key[0],
+ dscr.kick_reg[1], dscr.kick_key[1]);
+ else
+ soc_writel(val, dscr.base + reg);
+}
+
+
+/*
+ * Drivers can use this interface to enable/disable SoC IP blocks.
+ */
+void dscr_set_devstate(int id, enum dscr_devstate_t state)
+{
+ struct devstate_ctl_reg *ctl;
+ struct devstate_stat_reg *stat;
+ struct devstate_info *info;
+ u32 ctl_val, val;
+ int ctl_shift, ctl_mask;
+ unsigned long flags;
+
+ if (!dscr.base)
+ return;
+
+ if (id < 0 || id >= MAX_DEVSTATE_IDS)
+ return;
+
+ info = &dscr.devstate_info[id];
+ ctl = info->ctl;
+ stat = info->stat;
+
+ if (ctl == NULL)
+ return;
+
+ ctl_shift = ctl->shift + ctl->nbits * (id - ctl->start_id);
+ ctl_mask = ((1 << ctl->nbits) - 1) << ctl_shift;
+
+ switch (state) {
+ case DSCR_DEVSTATE_ENABLED:
+ ctl_val = ctl->enable << ctl_shift;
+ break;
+ case DSCR_DEVSTATE_DISABLED:
+ if (ctl->enable_only)
+ return;
+ ctl_val = ctl->disable << ctl_shift;
+ break;
+ default:
+ return;
+ }
+
+ spin_lock_irqsave(&dscr.lock, flags);
+
+ val = soc_readl(dscr.base + ctl->reg);
+ val &= ~ctl_mask;
+ val |= ctl_val;
+
+ dscr_write(ctl->reg, val);
+
+ spin_unlock_irqrestore(&dscr.lock, flags);
+
+ if (!stat)
+ return;
+
+ ctl_shift = stat->shift + stat->nbits * (id - stat->start_id);
+
+ if (state == DSCR_DEVSTATE_ENABLED)
+ ctl_val = stat->enable;
+ else
+ ctl_val = stat->disable;
+
+ do {
+ val = soc_readl(dscr.base + stat->reg);
+ val >>= ctl_shift;
+ val &= ((1 << stat->nbits) - 1);
+ } while (val != ctl_val);
+}
+EXPORT_SYMBOL(dscr_set_devstate);
+
+/*
+ * Drivers can use this to reset RMII module.
+ */
+void dscr_rmii_reset(int id, int assert)
+{
+ struct rmii_reset_reg *r;
+ unsigned long flags;
+ u32 val;
+
+ if (id < 0 || id >= MAX_SOC_EMACS)
+ return;
+
+ r = &dscr.rmii_resets[id];
+ if (r->mask == 0)
+ return;
+
+ spin_lock_irqsave(&dscr.lock, flags);
+
+ val = soc_readl(dscr.base + r->reg);
+ if (assert)
+ dscr_write(r->reg, val | r->mask);
+ else
+ dscr_write(r->reg, val & ~(r->mask));
+
+ spin_unlock_irqrestore(&dscr.lock, flags);
+}
+EXPORT_SYMBOL(dscr_rmii_reset);
+
+static void __init dscr_parse_devstat(struct device_node *node,
+ void __iomem *base)
+{
+ u32 val;
+ int err;
+
+ err = of_property_read_u32_array(node, "ti,dscr-devstat", &val, 1);
+ if (!err)
+ c6x_devstat = soc_readl(base + val);
+ printk(KERN_INFO "DEVSTAT: %08x\n", c6x_devstat);
+}
+
+static void __init dscr_parse_silicon_rev(struct device_node *node,
+ void __iomem *base)
+{
+ u32 vals[3];
+ int err;
+
+ err = of_property_read_u32_array(node, "ti,dscr-silicon-rev", vals, 3);
+ if (!err) {
+ c6x_silicon_rev = soc_readl(base + vals[0]);
+ c6x_silicon_rev >>= vals[1];
+ c6x_silicon_rev &= vals[2];
+ }
+}
+
+/*
+ * Some SoCs will have a pair of fuse registers which hold
+ * an ethernet MAC address. The "ti,dscr-mac-fuse-regs"
+ * property is a mapping from fuse register bytes to MAC
+ * address bytes. The expected format is:
+ *
+ * ti,dscr-mac-fuse-regs = <reg0 b3 b2 b1 b0
+ * reg1 b3 b2 b1 b0>
+ *
+ * reg0 and reg1 are the offsets of the two fuse registers.
+ * b3-b0 positionally represent bytes within the fuse register.
+ * b3 is the most significant byte and b0 is the least.
+ * Allowable values for b3-b0 are:
+ *
+ * 0 = fuse register byte not used in MAC address
+ * 1-6 = index+1 into c6x_fuse_mac[]
+ */
+static void __init dscr_parse_mac_fuse(struct device_node *node,
+ void __iomem *base)
+{
+ u32 vals[10], fuse;
+ int f, i, j, err;
+
+ err = of_property_read_u32_array(node, "ti,dscr-mac-fuse-regs",
+ vals, 10);
+ if (err)
+ return;
+
+ for (f = 0; f < 2; f++) {
+ fuse = soc_readl(base + vals[f * 5]);
+ for (j = (f * 5) + 1, i = 24; i >= 0; i -= 8, j++)
+ if (vals[j] && vals[j] <= 6)
+ c6x_fuse_mac[vals[j] - 1] = fuse >> i;
+ }
+}
+
+static void __init dscr_parse_rmii_resets(struct device_node *node,
+ void __iomem *base)
+{
+ const __be32 *p;
+ int i, size;
+
+ /* look for RMII reset registers */
+ p = of_get_property(node, "ti,dscr-rmii-resets", &size);
+ if (p) {
+ /* parse all the reg/mask pairs we can handle */
+ size /= (sizeof(*p) * 2);
+ if (size > MAX_SOC_EMACS)
+ size = MAX_SOC_EMACS;
+
+ for (i = 0; i < size; i++) {
+ dscr.rmii_resets[i].reg = be32_to_cpup(p++);
+ dscr.rmii_resets[i].mask = be32_to_cpup(p++);
+ }
+ }
+}
+
+
+static void __init dscr_parse_privperm(struct device_node *node,
+ void __iomem *base)
+{
+ u32 vals[2];
+ int err;
+
+ err = of_property_read_u32_array(node, "ti,dscr-privperm", vals, 2);
+ if (err)
+ return;
+ dscr_write(vals[0], vals[1]);
+}
+
+/*
+ * SoCs may have "locked" DSCR registers which can only be written
+ * to only after writing a key value to a lock registers. These
+ * regisers can be described with the "ti,dscr-locked-regs" property.
+ * This property provides a list of register descriptions with each
+ * description consisting of three values.
+ *
+ * ti,dscr-locked-regs = <reg0 lockreg0 key0
+ * ...
+ * regN lockregN keyN>;
+ *
+ * reg is the offset of the locked register
+ * lockreg is the offset of the lock register
+ * key is the unlock key written to lockreg
+ *
+ */
+static void __init dscr_parse_locked_regs(struct device_node *node,
+ void __iomem *base)
+{
+ struct locked_reg *r;
+ const __be32 *p;
+ int i, size;
+
+ p = of_get_property(node, "ti,dscr-locked-regs", &size);
+ if (p) {
+ /* parse all the register descriptions we can handle */
+ size /= (sizeof(*p) * 3);
+ if (size > MAX_LOCKED_REGS)
+ size = MAX_LOCKED_REGS;
+
+ for (i = 0; i < size; i++) {
+ r = &dscr.locked[i];
+
+ r->reg = be32_to_cpup(p++);
+ r->lockreg = be32_to_cpup(p++);
+ r->key = be32_to_cpup(p++);
+ }
+ }
+}
+
+/*
+ * SoCs may have DSCR registers which are only write enabled after
+ * writing specific key values to two registers. The two key registers
+ * and the key values can be parsed from a "ti,dscr-kick-regs"
+ * propety with the following layout:
+ *
+ * ti,dscr-kick-regs = <kickreg0 key0 kickreg1 key1>
+ *
+ * kickreg is the offset of the "kick" register
+ * key is the value which unlocks writing for protected regs
+ */
+static void __init dscr_parse_kick_regs(struct device_node *node,
+ void __iomem *base)
+{
+ u32 vals[4];
+ int err;
+
+ err = of_property_read_u32_array(node, "ti,dscr-kick-regs", vals, 4);
+ if (!err) {
+ dscr.kick_reg[0] = vals[0];
+ dscr.kick_key[0] = vals[1];
+ dscr.kick_reg[1] = vals[2];
+ dscr.kick_key[1] = vals[3];
+ }
+}
+
+
+/*
+ * SoCs may provide controls to enable/disable individual IP blocks. These
+ * controls in the DSCR usually control pin drivers but also may control
+ * clocking and or resets. The device tree is used to describe the bitfields
+ * in registers used to control device state. The number of bits and their
+ * values may vary even within the same register.
+ *
+ * The layout of these bitfields is described by the ti,dscr-devstate-ctl-regs
+ * property. This property is a list where each element describes a contiguous
+ * range of control fields with like properties. Each element of the list
+ * consists of 7 cells with the following values:
+ *
+ * start_id num_ids reg enable disable start_bit nbits
+ *
+ * start_id is device id for the first device control in the range
+ * num_ids is the number of device controls in the range
+ * reg is the offset of the register holding the control bits
+ * enable is the value to enable a device
+ * disable is the value to disable a device (0xffffffff if cannot disable)
+ * start_bit is the bit number of the first bit in the range
+ * nbits is the number of bits per device control
+ */
+static void __init dscr_parse_devstate_ctl_regs(struct device_node *node,
+ void __iomem *base)
+{
+ struct devstate_ctl_reg *r;
+ const __be32 *p;
+ int i, j, size;
+
+ p = of_get_property(node, "ti,dscr-devstate-ctl-regs", &size);
+ if (p) {
+ /* parse all the ranges we can handle */
+ size /= (sizeof(*p) * 7);
+ if (size > MAX_DEVCTL_REGS)
+ size = MAX_DEVCTL_REGS;
+
+ for (i = 0; i < size; i++) {
+ r = &dscr.devctl[i];
+
+ r->start_id = be32_to_cpup(p++);
+ r->num_ids = be32_to_cpup(p++);
+ r->reg = be32_to_cpup(p++);
+ r->enable = be32_to_cpup(p++);
+ r->disable = be32_to_cpup(p++);
+ if (r->disable == 0xffffffff)
+ r->enable_only = 1;
+ r->shift = be32_to_cpup(p++);
+ r->nbits = be32_to_cpup(p++);
+
+ for (j = r->start_id;
+ j < (r->start_id + r->num_ids);
+ j++)
+ dscr.devstate_info[j].ctl = r;
+ }
+ }
+}
+
+/*
+ * SoCs may provide status registers indicating the state (enabled/disabled) of
+ * devices on the SoC. The device tree is used to describe the bitfields in
+ * registers used to provide device status. The number of bits and their
+ * values used to provide status may vary even within the same register.
+ *
+ * The layout of these bitfields is described by the ti,dscr-devstate-stat-regs
+ * property. This property is a list where each element describes a contiguous
+ * range of status fields with like properties. Each element of the list
+ * consists of 7 cells with the following values:
+ *
+ * start_id num_ids reg enable disable start_bit nbits
+ *
+ * start_id is device id for the first device status in the range
+ * num_ids is the number of devices covered by the range
+ * reg is the offset of the register holding the status bits
+ * enable is the value indicating device is enabled
+ * disable is the value indicating device is disabled
+ * start_bit is the bit number of the first bit in the range
+ * nbits is the number of bits per device status
+ */
+static void __init dscr_parse_devstate_stat_regs(struct device_node *node,
+ void __iomem *base)
+{
+ struct devstate_stat_reg *r;
+ const __be32 *p;
+ int i, j, size;
+
+ p = of_get_property(node, "ti,dscr-devstate-stat-regs", &size);
+ if (p) {
+ /* parse all the ranges we can handle */
+ size /= (sizeof(*p) * 7);
+ if (size > MAX_DEVSTAT_REGS)
+ size = MAX_DEVSTAT_REGS;
+
+ for (i = 0; i < size; i++) {
+ r = &dscr.devstat[i];
+
+ r->start_id = be32_to_cpup(p++);
+ r->num_ids = be32_to_cpup(p++);
+ r->reg = be32_to_cpup(p++);
+ r->enable = be32_to_cpup(p++);
+ r->disable = be32_to_cpup(p++);
+ r->shift = be32_to_cpup(p++);
+ r->nbits = be32_to_cpup(p++);
+
+ for (j = r->start_id;
+ j < (r->start_id + r->num_ids);
+ j++)
+ dscr.devstate_info[j].stat = r;
+ }
+ }
+}
+
+static struct of_device_id dscr_ids[] __initdata = {
+ { .compatible = "ti,c64x+dscr" },
+ {}
+};
+
+/*
+ * Probe for DSCR area.
+ *
+ * This has to be done early on in case timer or interrupt controller
+ * needs something. e.g. On C6455 SoC, timer must be enabled through
+ * DSCR before it is functional.
+ */
+void __init dscr_probe(void)
+{
+ struct device_node *node;
+ void __iomem *base;
+
+ spin_lock_init(&dscr.lock);
+
+ node = of_find_matching_node(NULL, dscr_ids);
+ if (!node)
+ return;
+
+ base = of_iomap(node, 0);
+ if (!base) {
+ of_node_put(node);
+ return;
+ }
+
+ dscr.base = base;
+
+ dscr_parse_devstat(node, base);
+ dscr_parse_silicon_rev(node, base);
+ dscr_parse_mac_fuse(node, base);
+ dscr_parse_rmii_resets(node, base);
+ dscr_parse_locked_regs(node, base);
+ dscr_parse_kick_regs(node, base);
+ dscr_parse_devstate_ctl_regs(node, base);
+ dscr_parse_devstate_stat_regs(node, base);
+ dscr_parse_privperm(node, base);
+}
diff --git a/arch/c6x/platforms/emif.c b/arch/c6x/platforms/emif.c
new file mode 100644
index 00000000000..8b564dec241
--- /dev/null
+++ b/arch/c6x/platforms/emif.c
@@ -0,0 +1,87 @@
+/*
+ * External Memory Interface
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include <asm/soc.h>
+#include <asm/dscr.h>
+
+#define NUM_EMIFA_CHIP_ENABLES 4
+
+struct emifa_regs {
+ u32 midr;
+ u32 stat;
+ u32 reserved1[6];
+ u32 bprio;
+ u32 reserved2[23];
+ u32 cecfg[NUM_EMIFA_CHIP_ENABLES];
+ u32 reserved3[4];
+ u32 awcc;
+ u32 reserved4[7];
+ u32 intraw;
+ u32 intmsk;
+ u32 intmskset;
+ u32 intmskclr;
+};
+
+static struct of_device_id emifa_match[] __initdata = {
+ { .compatible = "ti,c64x+emifa" },
+ {}
+};
+
+/*
+ * Parse device tree for existence of an EMIF (External Memory Interface)
+ * and initialize it if found.
+ */
+static int __init c6x_emifa_init(void)
+{
+ struct emifa_regs __iomem *regs;
+ struct device_node *node;
+ const __be32 *p;
+ u32 val;
+ int i, len, err;
+
+ node = of_find_matching_node(NULL, emifa_match);
+ if (!node)
+ return 0;
+
+ regs = of_iomap(node, 0);
+ if (!regs)
+ return 0;
+
+ /* look for a dscr-based enable for emifa pin buffers */
+ err = of_property_read_u32_array(node, "ti,dscr-dev-enable", &val, 1);
+ if (!err)
+ dscr_set_devstate(val, DSCR_DEVSTATE_ENABLED);
+
+ /* set up the chip enables */
+ p = of_get_property(node, "ti,emifa-ce-config", &len);
+ if (p) {
+ len /= sizeof(u32);
+ if (len > NUM_EMIFA_CHIP_ENABLES)
+ len = NUM_EMIFA_CHIP_ENABLES;
+ for (i = 0; i <= len; i++)
+ soc_writel(be32_to_cpup(&p[i]), &regs->cecfg[i]);
+ }
+
+ err = of_property_read_u32_array(node, "ti,emifa-burst-priority", &val, 1);
+ if (!err)
+ soc_writel(val, &regs->bprio);
+
+ err = of_property_read_u32_array(node, "ti,emifa-async-wait-control", &val, 1);
+ if (!err)
+ soc_writel(val, &regs->awcc);
+
+ iounmap(regs);
+ of_node_put(node);
+ return 0;
+}
+pure_initcall(c6x_emifa_init);
diff --git a/arch/c6x/platforms/megamod-pic.c b/arch/c6x/platforms/megamod-pic.c
new file mode 100644
index 00000000000..7c37a947fb1
--- /dev/null
+++ b/arch/c6x/platforms/megamod-pic.c
@@ -0,0 +1,349 @@
+/*
+ * Support for C64x+ Megamodule Interrupt Controller
+ *
+ * Copyright (C) 2010, 2011 Texas Instruments Incorporated
+ * Contributed by: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <asm/soc.h>
+#include <asm/megamod-pic.h>
+
+#define NR_COMBINERS 4
+#define NR_MUX_OUTPUTS 12
+
+#define IRQ_UNMAPPED 0xffff
+
+/*
+ * Megamodule Interrupt Controller register layout
+ */
+struct megamod_regs {
+ u32 evtflag[8];
+ u32 evtset[8];
+ u32 evtclr[8];
+ u32 reserved0[8];
+ u32 evtmask[8];
+ u32 mevtflag[8];
+ u32 expmask[8];
+ u32 mexpflag[8];
+ u32 intmux_unused;
+ u32 intmux[7];
+ u32 reserved1[8];
+ u32 aegmux[2];
+ u32 reserved2[14];
+ u32 intxstat;
+ u32 intxclr;
+ u32 intdmask;
+ u32 reserved3[13];
+ u32 evtasrt;
+};
+
+struct megamod_pic {
+ struct irq_host *irqhost;
+ struct megamod_regs __iomem *regs;
+ raw_spinlock_t lock;
+
+ /* hw mux mapping */
+ unsigned int output_to_irq[NR_MUX_OUTPUTS];
+};
+
+static struct megamod_pic *mm_pic;
+
+struct megamod_cascade_data {
+ struct megamod_pic *pic;
+ int index;
+};
+
+static struct megamod_cascade_data cascade_data[NR_COMBINERS];
+
+static void mask_megamod(struct irq_data *data)
+{
+ struct megamod_pic *pic = irq_data_get_irq_chip_data(data);
+ irq_hw_number_t src = irqd_to_hwirq(data);
+ u32 __iomem *evtmask = &pic->regs->evtmask[src / 32];
+
+ raw_spin_lock(&pic->lock);
+ soc_writel(soc_readl(evtmask) | (1 << (src & 31)), evtmask);
+ raw_spin_unlock(&pic->lock);
+}
+
+static void unmask_megamod(struct irq_data *data)
+{
+ struct megamod_pic *pic = irq_data_get_irq_chip_data(data);
+ irq_hw_number_t src = irqd_to_hwirq(data);
+ u32 __iomem *evtmask = &pic->regs->evtmask[src / 32];
+
+ raw_spin_lock(&pic->lock);
+ soc_writel(soc_readl(evtmask) & ~(1 << (src & 31)), evtmask);
+ raw_spin_unlock(&pic->lock);
+}
+
+static struct irq_chip megamod_chip = {
+ .name = "megamod",
+ .irq_mask = mask_megamod,
+ .irq_unmask = unmask_megamod,
+};
+
+static void megamod_irq_cascade(unsigned int irq, struct irq_desc *desc)
+{
+ struct megamod_cascade_data *cascade;
+ struct megamod_pic *pic;
+ u32 events;
+ int n, idx;
+
+ cascade = irq_desc_get_handler_data(desc);
+
+ pic = cascade->pic;
+ idx = cascade->index;
+
+ while ((events = soc_readl(&pic->regs->mevtflag[idx])) != 0) {
+ n = __ffs(events);
+
+ irq = irq_linear_revmap(pic->irqhost, idx * 32 + n);
+
+ soc_writel(1 << n, &pic->regs->evtclr[idx]);
+
+ generic_handle_irq(irq);
+ }
+}
+
+static int megamod_map(struct irq_host *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ struct megamod_pic *pic = h->host_data;
+ int i;
+
+ /* We shouldn't see a hwirq which is muxed to core controller */
+ for (i = 0; i < NR_MUX_OUTPUTS; i++)
+ if (pic->output_to_irq[i] == hw)
+ return -1;
+
+ irq_set_chip_data(virq, pic);
+ irq_set_chip_and_handler(virq, &megamod_chip, handle_level_irq);
+
+ /* Set default irq type */
+ irq_set_irq_type(virq, IRQ_TYPE_NONE);
+
+ return 0;
+}
+
+static int megamod_xlate(struct irq_host *h, struct device_node *ct,
+ const u32 *intspec, unsigned int intsize,
+ irq_hw_number_t *out_hwirq, unsigned int *out_type)
+
+{
+ /* megamod intspecs must have 1 cell */
+ BUG_ON(intsize != 1);
+ *out_hwirq = intspec[0];
+ *out_type = IRQ_TYPE_NONE;
+ return 0;
+}
+
+static struct irq_host_ops megamod_host_ops = {
+ .map = megamod_map,
+ .xlate = megamod_xlate,
+};
+
+static void __init set_megamod_mux(struct megamod_pic *pic, int src, int output)
+{
+ int index, offset;
+ u32 val;
+
+ if (src < 0 || src >= (NR_COMBINERS * 32)) {
+ pic->output_to_irq[output] = IRQ_UNMAPPED;
+ return;
+ }
+
+ /* four mappings per mux register */
+ index = output / 4;
+ offset = (output & 3) * 8;
+
+ val = soc_readl(&pic->regs->intmux[index]);
+ val &= ~(0xff << offset);
+ val |= src << offset;
+ soc_writel(val, &pic->regs->intmux[index]);
+}
+
+/*
+ * Parse the MUX mapping, if one exists.
+ *
+ * The MUX map is an array of up to 12 cells; one for each usable core priority
+ * interrupt. The value of a given cell is the megamodule interrupt source
+ * which is to me MUXed to the output corresponding to the cell position
+ * withing the array. The first cell in the array corresponds to priority
+ * 4 and the last (12th) cell corresponds to priority 15. The allowed
+ * values are 4 - ((NR_COMBINERS * 32) - 1). Note that the combined interrupt
+ * sources (0 - 3) are not allowed to be mapped through this property. They
+ * are handled through the "interrupts" property. This allows us to use a
+ * value of zero as a "do not map" placeholder.
+ */
+static void __init parse_priority_map(struct megamod_pic *pic,
+ int *mapping, int size)
+{
+ struct device_node *np = pic->irqhost->of_node;
+ const __be32 *map;
+ int i, maplen;
+ u32 val;
+
+ map = of_get_property(np, "ti,c64x+megamod-pic-mux", &maplen);
+ if (map) {
+ maplen /= 4;
+ if (maplen > size)
+ maplen = size;
+
+ for (i = 0; i < maplen; i++) {
+ val = be32_to_cpup(map);
+ if (val && val >= 4)
+ mapping[i] = val;
+ ++map;
+ }
+ }
+}
+
+static struct megamod_pic * __init init_megamod_pic(struct device_node *np)
+{
+ struct megamod_pic *pic;
+ int i, irq;
+ int mapping[NR_MUX_OUTPUTS];
+
+ pr_info("Initializing C64x+ Megamodule PIC\n");
+
+ pic = kzalloc(sizeof(struct megamod_pic), GFP_KERNEL);
+ if (!pic) {
+ pr_err("%s: Could not alloc PIC structure.\n", np->full_name);
+ return NULL;
+ }
+
+ pic->irqhost = irq_alloc_host(np, IRQ_HOST_MAP_LINEAR,
+ NR_COMBINERS * 32, &megamod_host_ops,
+ IRQ_UNMAPPED);
+ if (!pic->irqhost) {
+ pr_err("%s: Could not alloc host.\n", np->full_name);
+ goto error_free;
+ }
+
+ pic->irqhost->host_data = pic;
+
+ raw_spin_lock_init(&pic->lock);
+
+ pic->regs = of_iomap(np, 0);
+ if (!pic->regs) {
+ pr_err("%s: Could not map registers.\n", np->full_name);
+ goto error_free;
+ }
+
+ /* Initialize MUX map */
+ for (i = 0; i < ARRAY_SIZE(mapping); i++)
+ mapping[i] = IRQ_UNMAPPED;
+
+ parse_priority_map(pic, mapping, ARRAY_SIZE(mapping));
+
+ /*
+ * We can have up to 12 interrupts cascading to the core controller.
+ * These cascades can be from the combined interrupt sources or for
+ * individual interrupt sources. The "interrupts" property only
+ * deals with the cascaded combined interrupts. The individual
+ * interrupts muxed to the core controller use the core controller
+ * as their interrupt parent.
+ */
+ for (i = 0; i < NR_COMBINERS; i++) {
+
+ irq = irq_of_parse_and_map(np, i);
+ if (irq == NO_IRQ)
+ continue;
+
+ /*
+ * We count on the core priority interrupts (4 - 15) being
+ * direct mapped. Check that device tree provided something
+ * in that range.
+ */
+ if (irq < 4 || irq >= NR_PRIORITY_IRQS) {
+ pr_err("%s: combiner-%d virq %d out of range!\n",
+ np->full_name, i, irq);
+ continue;
+ }
+
+ /* record the mapping */
+ mapping[irq - 4] = i;
+
+ pr_debug("%s: combiner-%d cascading to virq %d\n",
+ np->full_name, i, irq);
+
+ cascade_data[i].pic = pic;
+ cascade_data[i].index = i;
+
+ /* mask and clear all events in combiner */
+ soc_writel(~0, &pic->regs->evtmask[i]);
+ soc_writel(~0, &pic->regs->evtclr[i]);
+
+ irq_set_handler_data(irq, &cascade_data[i]);
+ irq_set_chained_handler(irq, megamod_irq_cascade);
+ }
+
+ /* Finally, set up the MUX registers */
+ for (i = 0; i < NR_MUX_OUTPUTS; i++) {
+ if (mapping[i] != IRQ_UNMAPPED) {
+ pr_debug("%s: setting mux %d to priority %d\n",
+ np->full_name, mapping[i], i + 4);
+ set_megamod_mux(pic, mapping[i], i);
+ }
+ }
+
+ return pic;
+
+error_free:
+ kfree(pic);
+
+ return NULL;
+}
+
+/*
+ * Return next active event after ACK'ing it.
+ * Return -1 if no events active.
+ */
+static int get_exception(void)
+{
+ int i, bit;
+ u32 mask;
+
+ for (i = 0; i < NR_COMBINERS; i++) {
+ mask = soc_readl(&mm_pic->regs->mexpflag[i]);
+ if (mask) {
+ bit = __ffs(mask);
+ soc_writel(1 << bit, &mm_pic->regs->evtclr[i]);
+ return (i * 32) + bit;
+ }
+ }
+ return -1;
+}
+
+static void assert_event(unsigned int val)
+{
+ soc_writel(val, &mm_pic->regs->evtasrt);
+}
+
+void __init megamod_pic_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "ti,c64x+megamod-pic");
+ if (!np)
+ return;
+
+ mm_pic = init_megamod_pic(np);
+ of_node_put(np);
+
+ soc_ops.get_exception = get_exception;
+ soc_ops.assert_event = assert_event;
+
+ return;
+}
diff --git a/arch/c6x/platforms/platform.c b/arch/c6x/platforms/platform.c
new file mode 100644
index 00000000000..26c1a355d60
--- /dev/null
+++ b/arch/c6x/platforms/platform.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright 2011 Texas Instruments Incorporated
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/init.h>
+#include <linux/of_platform.h>
+
+static int __init c6x_device_probe(void)
+{
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+ return 0;
+}
+core_initcall(c6x_device_probe);
diff --git a/arch/c6x/platforms/pll.c b/arch/c6x/platforms/pll.c
new file mode 100644
index 00000000000..3aa898f7ce4
--- /dev/null
+++ b/arch/c6x/platforms/pll.c
@@ -0,0 +1,444 @@
+/*
+ * Clock and PLL control for C64x+ devices
+ *
+ * Copyright (C) 2010, 2011 Texas Instruments.
+ * Contributed by: Mark Salter <msalter@redhat.com>
+ *
+ * Copied heavily from arm/mach-davinci/clock.c, so:
+ *
+ * Copyright (C) 2006-2007 Texas Instruments.
+ * Copyright (C) 2008-2009 Deep Root Systems, LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/clkdev.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/err.h>
+
+#include <asm/clock.h>
+#include <asm/soc.h>
+
+static LIST_HEAD(clocks);
+static DEFINE_MUTEX(clocks_mutex);
+static DEFINE_SPINLOCK(clockfw_lock);
+
+static void __clk_enable(struct clk *clk)
+{
+ if (clk->parent)
+ __clk_enable(clk->parent);
+ clk->usecount++;
+}
+
+static void __clk_disable(struct clk *clk)
+{
+ if (WARN_ON(clk->usecount == 0))
+ return;
+ --clk->usecount;
+
+ if (clk->parent)
+ __clk_disable(clk->parent);
+}
+
+int clk_enable(struct clk *clk)
+{
+ unsigned long flags;
+
+ if (clk == NULL || IS_ERR(clk))
+ return -EINVAL;
+
+ spin_lock_irqsave(&clockfw_lock, flags);
+ __clk_enable(clk);
+ spin_unlock_irqrestore(&clockfw_lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+ unsigned long flags;
+
+ if (clk == NULL || IS_ERR(clk))
+ return;
+
+ spin_lock_irqsave(&clockfw_lock, flags);
+ __clk_disable(clk);
+ spin_unlock_irqrestore(&clockfw_lock, flags);
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return -EINVAL;
+
+ return clk->rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+long clk_round_rate(struct clk *clk, unsigned long rate)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return -EINVAL;
+
+ if (clk->round_rate)
+ return clk->round_rate(clk, rate);
+
+ return clk->rate;
+}
+EXPORT_SYMBOL(clk_round_rate);
+
+/* Propagate rate to children */
+static void propagate_rate(struct clk *root)
+{
+ struct clk *clk;
+
+ list_for_each_entry(clk, &root->children, childnode) {
+ if (clk->recalc)
+ clk->rate = clk->recalc(clk);
+ propagate_rate(clk);
+ }
+}
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ if (clk == NULL || IS_ERR(clk))
+ return ret;
+
+ if (clk->set_rate)
+ ret = clk->set_rate(clk, rate);
+
+ spin_lock_irqsave(&clockfw_lock, flags);
+ if (ret == 0) {
+ if (clk->recalc)
+ clk->rate = clk->recalc(clk);
+ propagate_rate(clk);
+ }
+ spin_unlock_irqrestore(&clockfw_lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL(clk_set_rate);
+
+int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+ unsigned long flags;
+
+ if (clk == NULL || IS_ERR(clk))
+ return -EINVAL;
+
+ /* Cannot change parent on enabled clock */
+ if (WARN_ON(clk->usecount))
+ return -EINVAL;
+
+ mutex_lock(&clocks_mutex);
+ clk->parent = parent;
+ list_del_init(&clk->childnode);
+ list_add(&clk->childnode, &clk->parent->children);
+ mutex_unlock(&clocks_mutex);
+
+ spin_lock_irqsave(&clockfw_lock, flags);
+ if (clk->recalc)
+ clk->rate = clk->recalc(clk);
+ propagate_rate(clk);
+ spin_unlock_irqrestore(&clockfw_lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(clk_set_parent);
+
+int clk_register(struct clk *clk)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return -EINVAL;
+
+ if (WARN(clk->parent && !clk->parent->rate,
+ "CLK: %s parent %s has no rate!\n",
+ clk->name, clk->parent->name))
+ return -EINVAL;
+
+ mutex_lock(&clocks_mutex);
+ list_add_tail(&clk->node, &clocks);
+ if (clk->parent)
+ list_add_tail(&clk->childnode, &clk->parent->children);
+ mutex_unlock(&clocks_mutex);
+
+ /* If rate is already set, use it */
+ if (clk->rate)
+ return 0;
+
+ /* Else, see if there is a way to calculate it */
+ if (clk->recalc)
+ clk->rate = clk->recalc(clk);
+
+ /* Otherwise, default to parent rate */
+ else if (clk->parent)
+ clk->rate = clk->parent->rate;
+
+ return 0;
+}
+EXPORT_SYMBOL(clk_register);
+
+void clk_unregister(struct clk *clk)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return;
+
+ mutex_lock(&clocks_mutex);
+ list_del(&clk->node);
+ list_del(&clk->childnode);
+ mutex_unlock(&clocks_mutex);
+}
+EXPORT_SYMBOL(clk_unregister);
+
+
+static u32 pll_read(struct pll_data *pll, int reg)
+{
+ return soc_readl(pll->base + reg);
+}
+
+static unsigned long clk_sysclk_recalc(struct clk *clk)
+{
+ u32 v, plldiv = 0;
+ struct pll_data *pll;
+ unsigned long rate = clk->rate;
+
+ if (WARN_ON(!clk->parent))
+ return rate;
+
+ rate = clk->parent->rate;
+
+ /* the parent must be a PLL */
+ if (WARN_ON(!clk->parent->pll_data))
+ return rate;
+
+ pll = clk->parent->pll_data;
+
+ /* If pre-PLL, source clock is before the multiplier and divider(s) */
+ if (clk->flags & PRE_PLL)
+ rate = pll->input_rate;
+
+ if (!clk->div) {
+ pr_debug("%s: (no divider) rate = %lu KHz\n",
+ clk->name, rate / 1000);
+ return rate;
+ }
+
+ if (clk->flags & FIXED_DIV_PLL) {
+ rate /= clk->div;
+ pr_debug("%s: (fixed divide by %d) rate = %lu KHz\n",
+ clk->name, clk->div, rate / 1000);
+ return rate;
+ }
+
+ v = pll_read(pll, clk->div);
+ if (v & PLLDIV_EN)
+ plldiv = (v & PLLDIV_RATIO_MASK) + 1;
+
+ if (plldiv == 0)
+ plldiv = 1;
+
+ rate /= plldiv;
+
+ pr_debug("%s: (divide by %d) rate = %lu KHz\n",
+ clk->name, plldiv, rate / 1000);
+
+ return rate;
+}
+
+static unsigned long clk_leafclk_recalc(struct clk *clk)
+{
+ if (WARN_ON(!clk->parent))
+ return clk->rate;
+
+ pr_debug("%s: (parent %s) rate = %lu KHz\n",
+ clk->name, clk->parent->name, clk->parent->rate / 1000);
+
+ return clk->parent->rate;
+}
+
+static unsigned long clk_pllclk_recalc(struct clk *clk)
+{
+ u32 ctrl, mult = 0, prediv = 0, postdiv = 0;
+ u8 bypass;
+ struct pll_data *pll = clk->pll_data;
+ unsigned long rate = clk->rate;
+
+ if (clk->flags & FIXED_RATE_PLL)
+ return rate;
+
+ ctrl = pll_read(pll, PLLCTL);
+ rate = pll->input_rate = clk->parent->rate;
+
+ if (ctrl & PLLCTL_PLLEN)
+ bypass = 0;
+ else
+ bypass = 1;
+
+ if (pll->flags & PLL_HAS_MUL) {
+ mult = pll_read(pll, PLLM);
+ mult = (mult & PLLM_PLLM_MASK) + 1;
+ }
+ if (pll->flags & PLL_HAS_PRE) {
+ prediv = pll_read(pll, PLLPRE);
+ if (prediv & PLLDIV_EN)
+ prediv = (prediv & PLLDIV_RATIO_MASK) + 1;
+ else
+ prediv = 0;
+ }
+ if (pll->flags & PLL_HAS_POST) {
+ postdiv = pll_read(pll, PLLPOST);
+ if (postdiv & PLLDIV_EN)
+ postdiv = (postdiv & PLLDIV_RATIO_MASK) + 1;
+ else
+ postdiv = 1;
+ }
+
+ if (!bypass) {
+ if (prediv)
+ rate /= prediv;
+ if (mult)
+ rate *= mult;
+ if (postdiv)
+ rate /= postdiv;
+
+ pr_debug("PLL%d: input = %luMHz, pre[%d] mul[%d] post[%d] "
+ "--> %luMHz output.\n",
+ pll->num, clk->parent->rate / 1000000,
+ prediv, mult, postdiv, rate / 1000000);
+ } else
+ pr_debug("PLL%d: input = %luMHz, bypass mode.\n",
+ pll->num, clk->parent->rate / 1000000);
+
+ return rate;
+}
+
+
+static void __init __init_clk(struct clk *clk)
+{
+ INIT_LIST_HEAD(&clk->node);
+ INIT_LIST_HEAD(&clk->children);
+ INIT_LIST_HEAD(&clk->childnode);
+
+ if (!clk->recalc) {
+
+ /* Check if clock is a PLL */
+ if (clk->pll_data)
+ clk->recalc = clk_pllclk_recalc;
+
+ /* Else, if it is a PLL-derived clock */
+ else if (clk->flags & CLK_PLL)
+ clk->recalc = clk_sysclk_recalc;
+
+ /* Otherwise, it is a leaf clock (PSC clock) */
+ else if (clk->parent)
+ clk->recalc = clk_leafclk_recalc;
+ }
+}
+
+void __init c6x_clks_init(struct clk_lookup *clocks)
+{
+ struct clk_lookup *c;
+ struct clk *clk;
+ size_t num_clocks = 0;
+
+ for (c = clocks; c->clk; c++) {
+ clk = c->clk;
+
+ __init_clk(clk);
+ clk_register(clk);
+ num_clocks++;
+
+ /* Turn on clocks that Linux doesn't otherwise manage */
+ if (clk->flags & ALWAYS_ENABLED)
+ clk_enable(clk);
+ }
+
+ clkdev_add_table(clocks, num_clocks);
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#define CLKNAME_MAX 10 /* longest clock name */
+#define NEST_DELTA 2
+#define NEST_MAX 4
+
+static void
+dump_clock(struct seq_file *s, unsigned nest, struct clk *parent)
+{
+ char *state;
+ char buf[CLKNAME_MAX + NEST_DELTA * NEST_MAX];
+ struct clk *clk;
+ unsigned i;
+
+ if (parent->flags & CLK_PLL)
+ state = "pll";
+ else
+ state = "";
+
+ /* <nest spaces> name <pad to end> */
+ memset(buf, ' ', sizeof(buf) - 1);
+ buf[sizeof(buf) - 1] = 0;
+ i = strlen(parent->name);
+ memcpy(buf + nest, parent->name,
+ min(i, (unsigned)(sizeof(buf) - 1 - nest)));
+
+ seq_printf(s, "%s users=%2d %-3s %9ld Hz\n",
+ buf, parent->usecount, state, clk_get_rate(parent));
+ /* REVISIT show device associations too */
+
+ /* cost is now small, but not linear... */
+ list_for_each_entry(clk, &parent->children, childnode) {
+ dump_clock(s, nest + NEST_DELTA, clk);
+ }
+}
+
+static int c6x_ck_show(struct seq_file *m, void *v)
+{
+ struct clk *clk;
+
+ /*
+ * Show clock tree; We trust nonzero usecounts equate to PSC enables...
+ */
+ mutex_lock(&clocks_mutex);
+ list_for_each_entry(clk, &clocks, node)
+ if (!clk->parent)
+ dump_clock(m, 0, clk);
+ mutex_unlock(&clocks_mutex);
+
+ return 0;
+}
+
+static int c6x_ck_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, c6x_ck_show, NULL);
+}
+
+static const struct file_operations c6x_ck_operations = {
+ .open = c6x_ck_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init c6x_clk_debugfs_init(void)
+{
+ debugfs_create_file("c6x_clocks", S_IFREG | S_IRUGO, NULL, NULL,
+ &c6x_ck_operations);
+
+ return 0;
+}
+device_initcall(c6x_clk_debugfs_init);
+#endif /* CONFIG_DEBUG_FS */
diff --git a/arch/c6x/platforms/plldata.c b/arch/c6x/platforms/plldata.c
new file mode 100644
index 00000000000..2cfd6f42968
--- /dev/null
+++ b/arch/c6x/platforms/plldata.c
@@ -0,0 +1,404 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/clkdev.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/clock.h>
+#include <asm/setup.h>
+#include <asm/irq.h>
+
+/*
+ * Common SoC clock support.
+ */
+
+/* Default input for PLL1 */
+struct clk clkin1 = {
+ .name = "clkin1",
+ .node = LIST_HEAD_INIT(clkin1.node),
+ .children = LIST_HEAD_INIT(clkin1.children),
+ .childnode = LIST_HEAD_INIT(clkin1.childnode),
+};
+
+struct pll_data c6x_soc_pll1 = {
+ .num = 1,
+ .sysclks = {
+ {
+ .name = "pll1",
+ .parent = &clkin1,
+ .pll_data = &c6x_soc_pll1,
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk1",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk2",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk3",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk4",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk5",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk6",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk7",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk8",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk9",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk10",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk11",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk12",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk13",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk14",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk15",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ {
+ .name = "pll1_sysclk16",
+ .parent = &c6x_soc_pll1.sysclks[0],
+ .flags = CLK_PLL,
+ },
+ },
+};
+
+/* CPU core clock */
+struct clk c6x_core_clk = {
+ .name = "core",
+};
+
+/* miscellaneous IO clocks */
+struct clk c6x_i2c_clk = {
+ .name = "i2c",
+};
+
+struct clk c6x_watchdog_clk = {
+ .name = "watchdog",
+};
+
+struct clk c6x_mcbsp1_clk = {
+ .name = "mcbsp1",
+};
+
+struct clk c6x_mcbsp2_clk = {
+ .name = "mcbsp2",
+};
+
+struct clk c6x_mdio_clk = {
+ .name = "mdio",
+};
+
+
+#ifdef CONFIG_SOC_TMS320C6455
+static struct clk_lookup c6455_clks[] = {
+ CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
+ CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
+ CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
+ CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
+ CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
+ CLK(NULL, "core", &c6x_core_clk),
+ CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
+ CLK("watchdog", NULL, &c6x_watchdog_clk),
+ CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
+ CLK("", NULL, NULL)
+};
+
+
+static void __init c6455_setup_clocks(struct device_node *node)
+{
+ struct pll_data *pll = &c6x_soc_pll1;
+ struct clk *sysclks = pll->sysclks;
+
+ pll->flags = PLL_HAS_PRE | PLL_HAS_MUL;
+
+ sysclks[2].flags |= FIXED_DIV_PLL;
+ sysclks[2].div = 3;
+ sysclks[3].flags |= FIXED_DIV_PLL;
+ sysclks[3].div = 6;
+ sysclks[4].div = PLLDIV4;
+ sysclks[5].div = PLLDIV5;
+
+ c6x_core_clk.parent = &sysclks[0];
+ c6x_i2c_clk.parent = &sysclks[3];
+ c6x_watchdog_clk.parent = &sysclks[3];
+ c6x_mdio_clk.parent = &sysclks[3];
+
+ c6x_clks_init(c6455_clks);
+}
+#endif /* CONFIG_SOC_TMS320C6455 */
+
+#ifdef CONFIG_SOC_TMS320C6457
+static struct clk_lookup c6457_clks[] = {
+ CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
+ CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]),
+ CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
+ CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
+ CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
+ CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
+ CLK(NULL, "core", &c6x_core_clk),
+ CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
+ CLK("watchdog", NULL, &c6x_watchdog_clk),
+ CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
+ CLK("", NULL, NULL)
+};
+
+static void __init c6457_setup_clocks(struct device_node *node)
+{
+ struct pll_data *pll = &c6x_soc_pll1;
+ struct clk *sysclks = pll->sysclks;
+
+ pll->flags = PLL_HAS_MUL | PLL_HAS_POST;
+
+ sysclks[1].flags |= FIXED_DIV_PLL;
+ sysclks[1].div = 1;
+ sysclks[2].flags |= FIXED_DIV_PLL;
+ sysclks[2].div = 3;
+ sysclks[3].flags |= FIXED_DIV_PLL;
+ sysclks[3].div = 6;
+ sysclks[4].div = PLLDIV4;
+ sysclks[5].div = PLLDIV5;
+
+ c6x_core_clk.parent = &sysclks[1];
+ c6x_i2c_clk.parent = &sysclks[3];
+ c6x_watchdog_clk.parent = &sysclks[5];
+ c6x_mdio_clk.parent = &sysclks[5];
+
+ c6x_clks_init(c6457_clks);
+}
+#endif /* CONFIG_SOC_TMS320C6455 */
+
+#ifdef CONFIG_SOC_TMS320C6472
+static struct clk_lookup c6472_clks[] = {
+ CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
+ CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]),
+ CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]),
+ CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]),
+ CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]),
+ CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]),
+ CLK(NULL, "pll1_sysclk6", &c6x_soc_pll1.sysclks[6]),
+ CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]),
+ CLK(NULL, "pll1_sysclk8", &c6x_soc_pll1.sysclks[8]),
+ CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]),
+ CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]),
+ CLK(NULL, "core", &c6x_core_clk),
+ CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
+ CLK("watchdog", NULL, &c6x_watchdog_clk),
+ CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
+ CLK("", NULL, NULL)
+};
+
+/* assumptions used for delay loop calculations */
+#define MIN_CLKIN1_KHz 15625
+#define MAX_CORE_KHz 700000
+#define MIN_PLLOUT_KHz MIN_CLKIN1_KHz
+
+static void __init c6472_setup_clocks(struct device_node *node)
+{
+ struct pll_data *pll = &c6x_soc_pll1;
+ struct clk *sysclks = pll->sysclks;
+ int i;
+
+ pll->flags = PLL_HAS_MUL;
+
+ for (i = 1; i <= 6; i++) {
+ sysclks[i].flags |= FIXED_DIV_PLL;
+ sysclks[i].div = 1;
+ }
+
+ sysclks[7].flags |= FIXED_DIV_PLL;
+ sysclks[7].div = 3;
+ sysclks[8].flags |= FIXED_DIV_PLL;
+ sysclks[8].div = 6;
+ sysclks[9].flags |= FIXED_DIV_PLL;
+ sysclks[9].div = 2;
+ sysclks[10].div = PLLDIV10;
+
+ c6x_core_clk.parent = &sysclks[get_coreid() + 1];
+ c6x_i2c_clk.parent = &sysclks[8];
+ c6x_watchdog_clk.parent = &sysclks[8];
+ c6x_mdio_clk.parent = &sysclks[5];
+
+ c6x_clks_init(c6472_clks);
+}
+#endif /* CONFIG_SOC_TMS320C6472 */
+
+
+#ifdef CONFIG_SOC_TMS320C6474
+static struct clk_lookup c6474_clks[] = {
+ CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]),
+ CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]),
+ CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]),
+ CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]),
+ CLK(NULL, "pll1_sysclk11", &c6x_soc_pll1.sysclks[11]),
+ CLK(NULL, "pll1_sysclk12", &c6x_soc_pll1.sysclks[12]),
+ CLK(NULL, "pll1_sysclk13", &c6x_soc_pll1.sysclks[13]),
+ CLK(NULL, "core", &c6x_core_clk),
+ CLK("i2c_davinci.1", NULL, &c6x_i2c_clk),
+ CLK("mcbsp.1", NULL, &c6x_mcbsp1_clk),
+ CLK("mcbsp.2", NULL, &c6x_mcbsp2_clk),
+ CLK("watchdog", NULL, &c6x_watchdog_clk),
+ CLK("2c81800.mdio", NULL, &c6x_mdio_clk),
+ CLK("", NULL, NULL)
+};
+
+static void __init c6474_setup_clocks(struct device_node *node)
+{
+ struct pll_data *pll = &c6x_soc_pll1;
+ struct clk *sysclks = pll->sysclks;
+
+ pll->flags = PLL_HAS_MUL;
+
+ sysclks[7].flags |= FIXED_DIV_PLL;
+ sysclks[7].div = 1;
+ sysclks[9].flags |= FIXED_DIV_PLL;
+ sysclks[9].div = 3;
+ sysclks[10].flags |= FIXED_DIV_PLL;
+ sysclks[10].div = 6;
+
+ sysclks[11].div = PLLDIV11;
+
+ sysclks[12].flags |= FIXED_DIV_PLL;
+ sysclks[12].div = 2;
+
+ sysclks[13].div = PLLDIV13;
+
+ c6x_core_clk.parent = &sysclks[7];
+ c6x_i2c_clk.parent = &sysclks[10];
+ c6x_watchdog_clk.parent = &sysclks[10];
+ c6x_mcbsp1_clk.parent = &sysclks[10];
+ c6x_mcbsp2_clk.parent = &sysclks[10];
+
+ c6x_clks_init(c6474_clks);
+}
+#endif /* CONFIG_SOC_TMS320C6474 */
+
+static struct of_device_id c6x_clkc_match[] __initdata = {
+#ifdef CONFIG_SOC_TMS320C6455
+ { .compatible = "ti,c6455-pll", .data = c6455_setup_clocks },
+#endif
+#ifdef CONFIG_SOC_TMS320C6457
+ { .compatible = "ti,c6457-pll", .data = c6457_setup_clocks },
+#endif
+#ifdef CONFIG_SOC_TMS320C6472
+ { .compatible = "ti,c6472-pll", .data = c6472_setup_clocks },
+#endif
+#ifdef CONFIG_SOC_TMS320C6474
+ { .compatible = "ti,c6474-pll", .data = c6474_setup_clocks },
+#endif
+ { .compatible = "ti,c64x+pll" },
+ {}
+};
+
+void __init c64x_setup_clocks(void)
+{
+ void (*__setup_clocks)(struct device_node *np);
+ struct pll_data *pll = &c6x_soc_pll1;
+ struct device_node *node;
+ const struct of_device_id *id;
+ int err;
+ u32 val;
+
+ node = of_find_matching_node(NULL, c6x_clkc_match);
+ if (!node)
+ return;
+
+ pll->base = of_iomap(node, 0);
+ if (!pll->base)
+ goto out;
+
+ err = of_property_read_u32(node, "clock-frequency", &val);
+ if (err || val == 0) {
+ pr_err("%s: no clock-frequency found! Using %dMHz\n",
+ node->full_name, (int)val / 1000000);
+ val = 25000000;
+ }
+ clkin1.rate = val;
+
+ err = of_property_read_u32(node, "ti,c64x+pll-bypass-delay", &val);
+ if (err)
+ val = 5000;
+ pll->bypass_delay = val;
+
+ err = of_property_read_u32(node, "ti,c64x+pll-reset-delay", &val);
+ if (err)
+ val = 30000;
+ pll->reset_delay = val;
+
+ err = of_property_read_u32(node, "ti,c64x+pll-lock-delay", &val);
+ if (err)
+ val = 30000;
+ pll->lock_delay = val;
+
+ /* id->data is a pointer to SoC-specific setup */
+ id = of_match_node(c6x_clkc_match, node);
+ if (id && id->data) {
+ __setup_clocks = id->data;
+ __setup_clocks(node);
+ }
+
+out:
+ of_node_put(node);
+}
diff --git a/arch/c6x/platforms/timer64.c b/arch/c6x/platforms/timer64.c
new file mode 100644
index 00000000000..03c03c24919
--- /dev/null
+++ b/arch/c6x/platforms/timer64.c
@@ -0,0 +1,244 @@
+/*
+ * Copyright (C) 2010, 2011 Texas Instruments Incorporated
+ * Contributed by: Mark Salter (msalter@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <asm/soc.h>
+#include <asm/dscr.h>
+#include <asm/timer64.h>
+
+struct timer_regs {
+ u32 reserved0;
+ u32 emumgt;
+ u32 reserved1;
+ u32 reserved2;
+ u32 cntlo;
+ u32 cnthi;
+ u32 prdlo;
+ u32 prdhi;
+ u32 tcr;
+ u32 tgcr;
+ u32 wdtcr;
+};
+
+static struct timer_regs __iomem *timer;
+
+#define TCR_TSTATLO 0x001
+#define TCR_INVOUTPLO 0x002
+#define TCR_INVINPLO 0x004
+#define TCR_CPLO 0x008
+#define TCR_ENAMODELO_ONCE 0x040
+#define TCR_ENAMODELO_CONT 0x080
+#define TCR_ENAMODELO_MASK 0x0c0
+#define TCR_PWIDLO_MASK 0x030
+#define TCR_CLKSRCLO 0x100
+#define TCR_TIENLO 0x200
+#define TCR_TSTATHI (0x001 << 16)
+#define TCR_INVOUTPHI (0x002 << 16)
+#define TCR_CPHI (0x008 << 16)
+#define TCR_PWIDHI_MASK (0x030 << 16)
+#define TCR_ENAMODEHI_ONCE (0x040 << 16)
+#define TCR_ENAMODEHI_CONT (0x080 << 16)
+#define TCR_ENAMODEHI_MASK (0x0c0 << 16)
+
+#define TGCR_TIMLORS 0x001
+#define TGCR_TIMHIRS 0x002
+#define TGCR_TIMMODE_UD32 0x004
+#define TGCR_TIMMODE_WDT64 0x008
+#define TGCR_TIMMODE_CD32 0x00c
+#define TGCR_TIMMODE_MASK 0x00c
+#define TGCR_PSCHI_MASK (0x00f << 8)
+#define TGCR_TDDRHI_MASK (0x00f << 12)
+
+/*
+ * Timer clocks are divided down from the CPU clock
+ * The divisor is in the EMUMGTCLKSPD register
+ */
+#define TIMER_DIVISOR \
+ ((soc_readl(&timer->emumgt) & (0xf << 16)) >> 16)
+
+#define TIMER64_RATE (c6x_core_freq / TIMER_DIVISOR)
+
+#define TIMER64_MODE_DISABLED 0
+#define TIMER64_MODE_ONE_SHOT TCR_ENAMODELO_ONCE
+#define TIMER64_MODE_PERIODIC TCR_ENAMODELO_CONT
+
+static int timer64_mode;
+static int timer64_devstate_id = -1;
+
+static void timer64_config(unsigned long period)
+{
+ u32 tcr = soc_readl(&timer->tcr) & ~TCR_ENAMODELO_MASK;
+
+ soc_writel(tcr, &timer->tcr);
+ soc_writel(period - 1, &timer->prdlo);
+ soc_writel(0, &timer->cntlo);
+ tcr |= timer64_mode;
+ soc_writel(tcr, &timer->tcr);
+}
+
+static void timer64_enable(void)
+{
+ u32 val;
+
+ if (timer64_devstate_id >= 0)
+ dscr_set_devstate(timer64_devstate_id, DSCR_DEVSTATE_ENABLED);
+
+ /* disable timer, reset count */
+ soc_writel(soc_readl(&timer->tcr) & ~TCR_ENAMODELO_MASK, &timer->tcr);
+ soc_writel(0, &timer->prdlo);
+
+ /* use internal clock and 1 cycle pulse width */
+ val = soc_readl(&timer->tcr);
+ soc_writel(val & ~(TCR_CLKSRCLO | TCR_PWIDLO_MASK), &timer->tcr);
+
+ /* dual 32-bit unchained mode */
+ val = soc_readl(&timer->tgcr) & ~TGCR_TIMMODE_MASK;
+ soc_writel(val, &timer->tgcr);
+ soc_writel(val | (TGCR_TIMLORS | TGCR_TIMMODE_UD32), &timer->tgcr);
+}
+
+static void timer64_disable(void)
+{
+ /* disable timer, reset count */
+ soc_writel(soc_readl(&timer->tcr) & ~TCR_ENAMODELO_MASK, &timer->tcr);
+ soc_writel(0, &timer->prdlo);
+
+ if (timer64_devstate_id >= 0)
+ dscr_set_devstate(timer64_devstate_id, DSCR_DEVSTATE_DISABLED);
+}
+
+static int next_event(unsigned long delta,
+ struct clock_event_device *evt)
+{
+ timer64_config(delta);
+ return 0;
+}
+
+static void set_clock_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ timer64_enable();
+ timer64_mode = TIMER64_MODE_PERIODIC;
+ timer64_config(TIMER64_RATE / HZ);
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ timer64_enable();
+ timer64_mode = TIMER64_MODE_ONE_SHOT;
+ break;
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ timer64_mode = TIMER64_MODE_DISABLED;
+ timer64_disable();
+ break;
+ case CLOCK_EVT_MODE_RESUME:
+ break;
+ }
+}
+
+static struct clock_event_device t64_clockevent_device = {
+ .name = "TIMER64_EVT32_TIMER",
+ .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
+ .rating = 200,
+ .set_mode = set_clock_mode,
+ .set_next_event = next_event,
+};
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *cd = &t64_clockevent_device;
+
+ cd->event_handler(cd);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction timer_iact = {
+ .name = "timer",
+ .flags = IRQF_TIMER,
+ .handler = timer_interrupt,
+ .dev_id = &t64_clockevent_device,
+};
+
+void __init timer64_init(void)
+{
+ struct clock_event_device *cd = &t64_clockevent_device;
+ struct device_node *np, *first = NULL;
+ u32 val;
+ int err, found = 0;
+
+ for_each_compatible_node(np, NULL, "ti,c64x+timer64") {
+ err = of_property_read_u32(np, "ti,core-mask", &val);
+ if (!err) {
+ if (val & (1 << get_coreid())) {
+ found = 1;
+ break;
+ }
+ } else if (!first)
+ first = np;
+ }
+ if (!found) {
+ /* try first one with no core-mask */
+ if (first)
+ np = of_node_get(first);
+ else {
+ pr_debug("Cannot find ti,c64x+timer64 timer.\n");
+ return;
+ }
+ }
+
+ timer = of_iomap(np, 0);
+ if (!timer) {
+ pr_debug("%s: Cannot map timer registers.\n", np->full_name);
+ goto out;
+ }
+ pr_debug("%s: Timer registers=%p.\n", np->full_name, timer);
+
+ cd->irq = irq_of_parse_and_map(np, 0);
+ if (cd->irq == NO_IRQ) {
+ pr_debug("%s: Cannot find interrupt.\n", np->full_name);
+ iounmap(timer);
+ goto out;
+ }
+
+ /* If there is a device state control, save the ID. */
+ err = of_property_read_u32(np, "ti,dscr-dev-enable", &val);
+ if (!err) {
+ timer64_devstate_id = val;
+
+ /*
+ * It is necessary to enable the timer block here because
+ * the TIMER_DIVISOR macro needs to read a timer register
+ * to get the divisor.
+ */
+ dscr_set_devstate(timer64_devstate_id, DSCR_DEVSTATE_ENABLED);
+ }
+
+ pr_debug("%s: Timer irq=%d.\n", np->full_name, cd->irq);
+
+ clockevents_calc_mult_shift(cd, c6x_core_freq / TIMER_DIVISOR, 5);
+
+ cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd);
+ cd->min_delta_ns = clockevent_delta2ns(250, cd);
+
+ cd->cpumask = cpumask_of(smp_processor_id());
+
+ clockevents_register_device(cd);
+ setup_irq(cd->irq, &timer_iact);
+
+out:
+ of_node_put(np);
+ return;
+}