aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/include/debug/imx.S
diff options
context:
space:
mode:
authorShawn Guo <shawn.guo@linaro.org>2012-09-16 20:50:45 +0800
committerShawn Guo <shawn.guo@linaro.org>2012-10-15 10:05:42 +0800
commit6dde5ac5220b3b9c28f82f291b64eca3e5ebe80d (patch)
treecdd1a0b89e2532a71c7270cb4c062b2f1e8ccead /arch/arm/include/debug/imx.S
parente69dc9a91eeb0387e08d8e1d0e576c88b28902fc (diff)
ARM: imx: move debug macros to include/debug
Move imx debug-macro.S over to common debug macro directory. It removes the inclusion to hardware.h by hard-coding the physical address of uart port and copying IMX_IO_P2V from hardware.h. Since we will need a common solution, which might use a fixed virtual address for uart port across platforms, we make a copy of IMX_IO_P2V here as a temporary solution to enable low-level debug for imx multi-platform build. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/include/debug/imx.S')
-rw-r--r--arch/arm/include/debug/imx.S62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/include/debug/imx.S b/arch/arm/include/debug/imx.S
new file mode 100644
index 00000000000..0b65d792f66
--- /dev/null
+++ b/arch/arm/include/debug/imx.S
@@ -0,0 +1,62 @@
+/* arch/arm/mach-imx/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * 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.
+ *
+ */
+#ifdef CONFIG_DEBUG_IMX1_UART
+#define UART_PADDR 0x00206000
+#elif defined (CONFIG_DEBUG_IMX25_UART)
+#define UART_PADDR 0x43f90000
+#elif defined (CONFIG_DEBUG_IMX21_IMX27_UART)
+#define UART_PADDR 0x1000a000
+#elif defined (CONFIG_DEBUG_IMX31_IMX35_UART)
+#define UART_PADDR 0x43f90000
+#elif defined (CONFIG_DEBUG_IMX51_UART)
+#define UART_PADDR 0x73fbc000
+#elif defined (CONFIG_DEBUG_IMX50_IMX53_UART)
+#define UART_PADDR 0x53fbc000
+#elif defined (CONFIG_DEBUG_IMX6Q_UART2)
+#define UART_PADDR 0x021e8000
+#elif defined (CONFIG_DEBUG_IMX6Q_UART4)
+#define UART_PADDR 0x021f0000
+#endif
+
+/*
+ * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to
+ * stay sync with that. It's hard to maintain, and should be fixed
+ * globally for multi-platform build to use a fixed virtual address
+ * for low-level debug uart port across platforms.
+ */
+#define IMX_IO_P2V(x) ( \
+ (((x) & 0x80000000) >> 7) | \
+ (0xf4000000 + \
+ (((x) & 0x50000000) >> 6) + \
+ (((x) & 0x0b000000) >> 4) + \
+ (((x) & 0x000fffff))))
+
+#define UART_VADDR IMX_IO_P2V(UART_PADDR)
+
+ .macro addruart, rp, rv, tmp
+ ldr \rp, =UART_PADDR @ physical
+ ldr \rv, =UART_VADDR @ virtual
+ .endm
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #0x40] @ TXDATA
+ .endm
+
+ .macro waituart,rd,rx
+ .endm
+
+ .macro busyuart,rd,rx
+1002: ldr \rd, [\rx, #0x98] @ SR2
+ tst \rd, #1 << 3 @ TXDC
+ beq 1002b @ wait until transmit done
+ .endm