[PATCH] ARM: 2745/1: Fix IXP4xx debug macros

Patch from Deepak Saxena

Current IXP4xx debug macros do not work in the small window between
the MMU being enabled and the call to map_io() b/c the standard
peripheral mapping is not properly setup for use with the low-level
debug code. This patch creates a new section-aligned mapping for the
UART specifically for use with the debug macros.

Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
index 267ba02d77dc..f39e8408488f 100644
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c
@@ -141,7 +141,15 @@ static struct map_desc ixp4xx_io_desc[] __initdata = {
                 .physical       = IXP4XX_PCI_CFG_BASE_PHYS,
                 .length         = IXP4XX_PCI_CFG_REGION_SIZE,
                 .type           = MT_DEVICE
+        },
+#ifdef CONFIG_DEBUG_LL
+        {       /* Debug UART mapping */
+                .virtual        = IXP4XX_DEBUG_UART_BASE_VIRT,
+                .physical       = IXP4XX_DEBUG_UART_BASE_PHYS,
+                .length         = IXP4XX_DEBUG_UART_REGION_SIZE,
+                .type           = MT_DEVICE
         }
+#endif
 };
 
 void __init ixp4xx_map_io(void)