3 files changed, 16 insertions, 8 deletions
diff --git a/arch/arm/include/asm/mach/map.h b/arch/arm/include/asm/mach/map.h
index cb1139ac1943..39d949b63e80 100644
--- a/arch/arm/include/asm/mach/map.h
+++ b/arch/arm/include/asm/mach/map.h
@@ -19,12 +19,13 @@ struct map_desc {
 };
 
 /* types 0-3 are defined in asm/io.h */
-#define MT_CACHECLEAN		4
-#define MT_MINICLEAN		5
-#define MT_LOW_VECTORS		6
-#define MT_HIGH_VECTORS		7
-#define MT_MEMORY		8
-#define MT_ROM			9
+#define MT_UNCACHED		4
+#define MT_CACHECLEAN		5
+#define MT_MINICLEAN		6
+#define MT_LOW_VECTORS		7
+#define MT_HIGH_VECTORS		8
+#define MT_MEMORY		9
+#define MT_ROM			10
 
 #ifdef CONFIG_MMU
 extern void iotable_init(struct map_desc *, int);
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index e63db11f16a8..7f36c825718d 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -208,6 +208,12 @@ static struct mem_type mem_types[] = {
 		.prot_sect	= PROT_SECT_DEVICE,
 		.domain		= DOMAIN_IO,
 	},
+	[MT_UNCACHED] = {
+		.prot_pte	= PROT_PTE_DEVICE,
+		.prot_l1	= PMD_TYPE_TABLE,
+		.prot_sect	= PMD_TYPE_SECT | PMD_SECT_XN,
+		.domain		= DOMAIN_IO,
+	},
 	[MT_CACHECLEAN] = {
 		.prot_sect = PMD_TYPE_SECT | PMD_SECT_XN,
 		.domain    = DOMAIN_KERNEL,
diff --git a/arch/arm/plat-iop/setup.c b/arch/arm/plat-iop/setup.c
index 4689db638e95..9e573e78176a 100644
--- a/arch/arm/plat-iop/setup.c
+++ b/arch/arm/plat-iop/setup.c
@@ -16,14 +16,15 @@
 #include <asm/hardware/iop3xx.h>
 
 /*
- * Standard IO mapping for all IOP3xx based systems
+ * Standard IO mapping for all IOP3xx based systems.  Note that
+ * the IOP3xx OCCDR must be mapped uncached and unbuffered.
  */
 static struct map_desc iop3xx_std_desc[] __initdata = {
 	 {	/* mem mapped registers */
 		.virtual	= IOP3XX_PERIPHERAL_VIRT_BASE,
 		.pfn		= __phys_to_pfn(IOP3XX_PERIPHERAL_PHYS_BASE),
 		.length		= IOP3XX_PERIPHERAL_SIZE,
-		.type		= MT_DEVICE,
+		.type		= MT_UNCACHED,
 	 }, {	/* PCI IO space */
 		.virtual	= IOP3XX_PCI_LOWER_IO_VA,
 		.pfn		= __phys_to_pfn(IOP3XX_PCI_LOWER_IO_PA),