diff options
Diffstat (limited to 'arch/sh/include/asm/page.h')
| -rw-r--r-- | arch/sh/include/asm/page.h | 19 |
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) |