1 files changed, 18 insertions, 1 deletions

diff --git a/arch/sh/include/asm/page.h b/arch/sh/include/asm/page.h
index 3accdc5ab12..8237d9f53e5 100644
--- a/arch/sh/include/asm/page.h
+++ b/arch/sh/include/asm/page.h
@@ -50,13 +50,22 @@ extern unsigned long shm_align_mask;
 extern unsigned long max_low_pfn, min_low_pfn;
 extern unsigned long memory_start, memory_end;
 
+#ifdef CONFIG_UNCACHED_MAPPING
+extern unsigned long uncached_start, uncached_end;
+
+extern int virt_addr_uncached(unsigned long kaddr);
+extern void uncached_init(void);
+#else
+#define virt_addr_uncached(kaddr)       (0)
+#define uncached_init()                 do { } while (0)
+#endif
+
 static inline unsigned long
 pages_do_alias(unsigned long addr1, unsigned long addr2)
 {
         return (addr1 ^ addr2) & shm_align_mask;
 }
 
-
 #define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
 extern void copy_page(void *to, void *from);
 
@@ -135,6 +144,14 @@ typedef struct page *pgtable_t;
 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
 #endif
 
+#ifdef CONFIG_UNCACHED_MAPPING
+#define UNCAC_ADDR(addr)        ((addr) - PAGE_OFFSET + uncached_start)
+#define CAC_ADDR(addr)          ((addr) - uncached_start + PAGE_OFFSET)
+#else
+#define UNCAC_ADDR(addr)        ((addr))
+#define CAC_ADDR(addr)          ((addr))
+#endif
+
 #define pfn_to_kaddr(pfn)       __va((pfn) << PAGE_SHIFT)
 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)