[ARM] 3552/1: S3C24XX: Move VA of GPIO for low-level debug

Patch from Ben Dooks

Using the low-level debug routines early in the
kernel debug cause the 1:1 mapping to get into
the TLB, which is not flushed until after the
CPU detection process (which needs the GPIO VA).

This patch moves the VA for the GPIO to the
same offset as the physical offset of the UART
to the GPIO.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 10 insertions, 1 deletions

diff --git a/include/asm-arm/arch-s3c2410/map.h b/include/asm-arm/arch-s3c2410/map.h
index c380d264a847..5e4c8c37bc66 100644
--- a/include/asm-arm/arch-s3c2410/map.h
+++ b/include/asm-arm/arch-s3c2410/map.h
@@ -126,9 +126,18 @@
 #define S3C24XX_SZ_IIS     SZ_1M
 
 /* GPIO ports */
-#define S3C24XX_VA_GPIO    S3C2410_ADDR(0x00E00000)
+
+/* the calculation for the VA of this must ensure that
+ * it is the same distance apart from the UART in the
+ * phsyical address space, as the initial mapping for the IO
+ * is done as a 1:1 maping. This puts it (currently) at
+ * 0xF6800000, which is not in the way of any current mapping
+ * by the base system.
+*/
+
 #define S3C2400_PA_GPIO    (0x15600000)
 #define S3C2410_PA_GPIO    (0x56000000)
+#define S3C24XX_VA_GPIO    ((S3C2410_PA_GPIO - S3C24XX_PA_UART) + S3C24XX_VA_UART)
 #define S3C24XX_SZ_GPIO    SZ_1M
 
 /* RTC */