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[MIPS] Add support for BCM47XX CPUs. 

Note that the BCM4710 does not support the wait instruction, this
is not a mistake in the code.
    
It originally comes from the OpenWrt patches.
    
Cc: Michael Buesch <mb@bu3sch.de>
Cc: Felix Fietkau <nbd@openwrt.org>
Cc: Florian Schirmer <jolt@tuxbox.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Aurelien Jarno 2007-09-25 15:40:12 +02:00 committed by Ralf Baechle
parent ea202c632a
commit 1c0c13eb93
14 changed files with 385 additions and 2 deletions
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14
arch/mips/Kconfig
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@ -44,6 +44,20 @@ config BASLER_EXCITE_PROTOTYPE
note that a kernel built with this option selected will not be
able to run on normal units.
config BCM47XX
bool "BCM47XX based boards"
select DMA_NONCOHERENT
select HW_HAS_PCI
select IRQ_CPU
select SYS_HAS_CPU_MIPS32_R1
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
select SSB
select SSB_DRIVER_MIPS
select GENERIC_GPIO
help
Support for BCM47XX based boards
config MIPS_COBALT
bool "Cobalt Server"
select DMA_NONCOHERENT

7
arch/mips/Makefile
View File

@ -534,6 +534,13 @@ load-$(CONFIG_SIBYTE_SWARM) := 0xffffffff80100000
libs-$(CONFIG_SIBYTE_BIGSUR) += arch/mips/sibyte/swarm/
load-$(CONFIG_SIBYTE_BIGSUR) := 0xffffffff80100000
#
# Broadcom BCM47XX boards
#
core-$(CONFIG_BCM47XX) += arch/mips/bcm47xx/
cflags-$(CONFIG_BCM47XX) += -Iinclude/asm-mips/mach-bcm47xx
load-$(CONFIG_BCM47XX) := 0xffffffff80001000
#
# SNI RM
#

6
arch/mips/bcm47xx/Makefile Normal file
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@ -0,0 +1,6 @@
#
# Makefile for the BCM47XX specific kernel interface routines
# under Linux.
#
obj-y := irq.o prom.o serial.o setup.o time.o

55
arch/mips/bcm47xx/irq.c Normal file
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@ -0,0 +1,55 @@
/*
* Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
*
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <asm/irq_cpu.h>
void plat_irq_dispatch(void)
{
u32 cause;
cause = read_c0_cause() & read_c0_status() & CAUSEF_IP;
clear_c0_status(cause);
if (cause & CAUSEF_IP7)
do_IRQ(7);
if (cause & CAUSEF_IP2)
do_IRQ(2);
if (cause & CAUSEF_IP3)
do_IRQ(3);
if (cause & CAUSEF_IP4)
do_IRQ(4);
if (cause & CAUSEF_IP5)
do_IRQ(5);
if (cause & CAUSEF_IP6)
do_IRQ(6);
}
void __init arch_init_irq(void)
{
mips_cpu_irq_init();
}

49
arch/mips/bcm47xx/prom.c Normal file
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@ -0,0 +1,49 @@
/*
* Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
*
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/init.h>
#include <asm/bootinfo.h>
const char *get_system_type(void)
{
return "Broadcom BCM47XX";
}
void __init prom_init(void)
{
unsigned long mem;
/* Figure out memory size by finding aliases */
for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) {
if (*(unsigned long *)((unsigned long)(prom_init) + mem) ==
*(unsigned long *)(prom_init))
break;
}
add_memory_region(0, mem, BOOT_MEM_RAM);
}
void __init prom_free_prom_memory(void)
{
}

52
arch/mips/bcm47xx/serial.c Normal file
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@ -0,0 +1,52 @@
/*
* 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.
*
* Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>
#include <linux/ssb/ssb.h>
#include <bcm47xx.h>
static struct plat_serial8250_port uart8250_data[5];
static struct platform_device uart8250_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = uart8250_data,
},
};
static int __init uart8250_init(void)
{
int i;
struct ssb_mipscore *mcore = &(ssb_bcm47xx.mipscore);
memset(&uart8250_data, 0, sizeof(uart8250_data));
for (i = 0; i < mcore->nr_serial_ports; i++) {
struct plat_serial8250_port *p = &(uart8250_data[i]);
struct ssb_serial_port *ssb_port = &(mcore->serial_ports[i]);
p->mapbase = (unsigned int) ssb_port->regs;
p->membase = (void *) ssb_port->regs;
p->irq = ssb_port->irq + 2;
p->uartclk = ssb_port->baud_base;
p->regshift = ssb_port->reg_shift;
p->iotype = UPIO_MEM;
p->flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
}
return platform_device_register(&uart8250_device);
}
module_init(uart8250_init);
MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("8250 UART probe driver for the BCM47XX platforms");

79
arch/mips/bcm47xx/setup.c Normal file
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@ -0,0 +1,79 @@
/*
* Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
* Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
* Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2006 Michael Buesch <mb@bu3sch.de>
*
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/types.h>
#include <linux/ssb/ssb.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <bcm47xx.h>
struct ssb_bus ssb_bcm47xx;
EXPORT_SYMBOL(ssb_bcm47xx);
static void bcm47xx_machine_restart(char *command)
{
printk(KERN_ALERT "Please stand by while rebooting the system...\n");
local_irq_disable();
/* Set the watchdog timer to reset immediately */
ssb_chipco_watchdog_timer_set(&ssb_bcm47xx.chipco, 1);
while (1)
cpu_relax();
}
static void bcm47xx_machine_halt(void)
{
/* Disable interrupts and watchdog and spin forever */
local_irq_disable();
ssb_chipco_watchdog_timer_set(&ssb_bcm47xx.chipco, 0);
while (1)
cpu_relax();
}
static int bcm47xx_get_invariants(struct ssb_bus *bus,
struct ssb_init_invariants *iv)
{
/* TODO: fill ssb_init_invariants using boardtype/boardrev
* CFE environment variables.
*/
return 0;
}
void __init plat_mem_setup(void)
{
int err;
err = ssb_bus_ssbbus_register(&ssb_bcm47xx, SSB_ENUM_BASE,
bcm47xx_get_invariants);
if (err)
panic("Failed to initialize SSB bus (err %d)\n", err);
_machine_restart = bcm47xx_machine_restart;
_machine_halt = bcm47xx_machine_halt;
pm_power_off = bcm47xx_machine_halt;
board_time_init = bcm47xx_time_init;
}

56
arch/mips/bcm47xx/time.c Normal file
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@ -0,0 +1,56 @@
/*
* Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
*
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/init.h>
#include <linux/ssb/ssb.h>
#include <asm/time.h>
#include <bcm47xx.h>
void __init
bcm47xx_time_init(void)
{
unsigned long hz;
/*
* Use deterministic values for initial counter interrupt
* so that calibrate delay avoids encountering a counter wrap.
*/
write_c0_count(0);
write_c0_compare(0xffff);
hz = ssb_cpu_clock(&ssb_bcm47xx.mipscore) / 2;
if (!hz)
hz = 100000000;
/* Set MIPS counter frequency for fixed_rate_gettimeoffset() */
mips_hpt_frequency = hz;
}
void __init
plat_timer_setup(struct irqaction *irq)
{
/* Enable the timer interrupt */
setup_irq(7, irq);
}

20
arch/mips/kernel/cpu-probe.c
View File

@ -159,6 +159,7 @@ static inline void check_wait(void)
case CPU_5KC:
case CPU_25KF:
case CPU_PR4450:
case CPU_BCM3302:
cpu_wait = r4k_wait;
break;
@ -793,6 +794,22 @@ static inline void cpu_probe_philips(struct cpuinfo_mips *c)
}
static inline void cpu_probe_broadcom(struct cpuinfo_mips *c)
{
decode_configs(c);
switch (c->processor_id & 0xff00) {
case PRID_IMP_BCM3302:
c->cputype = CPU_BCM3302;
break;
case PRID_IMP_BCM4710:
c->cputype = CPU_BCM4710;
break;
default:
c->cputype = CPU_UNKNOWN;
break;
}
}
__init void cpu_probe(void)
{
struct cpuinfo_mips *c = &current_cpu_data;
@ -815,6 +832,9 @@ __init void cpu_probe(void)
case PRID_COMP_SIBYTE:
cpu_probe_sibyte(c);
break;
case PRID_COMP_BROADCOM:
cpu_probe_broadcom(c);
break;
case PRID_COMP_SANDCRAFT:
cpu_probe_sandcraft(c);
break;

2
arch/mips/kernel/proc.c
View File

@ -82,6 +82,8 @@ static const char *cpu_name[] = {
[CPU_VR4181] = "NEC VR4181",
[CPU_VR4181A] = "NEC VR4181A",
[CPU_SR71000] = "Sandcraft SR71000",
[CPU_BCM3302] = "Broadcom BCM3302",
[CPU_BCM4710] = "Broadcom BCM4710",
[CPU_PR4450] = "Philips PR4450",
[CPU_LOONGSON2] = "ICT Loongson-2",
};

2
arch/mips/mm/tlbex.c
View File

@ -908,6 +908,8 @@ static __init void build_tlb_write_entry(u32 **p, struct label **l,
case CPU_4KSC:
case CPU_20KC:
case CPU_25KF:
case CPU_BCM3302:
case CPU_BCM4710:
case CPU_LOONGSON2:
if (m4kc_tlbp_war())
i_nop(p);

6
include/asm-mips/bootinfo.h
View File

@ -215,6 +215,12 @@
#define MACH_GROUP_WINDRIVER 28 /* Windriver boards */
#define MACH_WRPPMC 1
/*
* Valid machtype for group Broadcom
*/
#define MACH_GROUP_BRCM 23 /* Broadcom */
#define MACH_BCM47XX 1 /* Broadcom BCM47XX */
#define CL_SIZE COMMAND_LINE_SIZE
const char *get_system_type(void);

12
include/asm-mips/cpu.h
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@ -105,6 +105,13 @@
#define PRID_IMP_SR71000 0x0400
/*
* These are the PRID's for when 23:16 == PRID_COMP_BROADCOM
*/
#define PRID_IMP_BCM4710 0x4000
#define PRID_IMP_BCM3302 0x9000
/*
* Definitions for 7:0 on legacy processors
*/
@ -217,8 +224,9 @@
#define CPU_R14000 64
#define CPU_LOONGSON1 65
#define CPU_LOONGSON2 66
#define CPU_LAST 66
#define CPU_BCM3302 67
#define CPU_BCM4710 68
#define CPU_LAST 68
/*
* ISA Level encodings

27
include/asm-mips/mach-bcm47xx/bcm47xx.h Normal file
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@ -0,0 +1,27 @@
/*
* Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
*
* 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.
*/
#ifndef __ASM_BCM47XX_H
#define __ASM_BCM47XX_H
/* SSB bus */
extern struct ssb_bus ssb_bcm47xx;
extern void bcm47xx_time_init(void);
#endif /* __ASM_BCM47XX_H */