diff options
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/io.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h index 24b7337..281682c 100644 --- a/arch/arc/include/asm/io.h +++ b/arch/arc/include/asm/io.h @@ -10,6 +10,30 @@ #include <linux/types.h> #include <asm/byteorder.h> +/* + * Given a physical address and a length, return a virtual address + * that can be used to access the memory range with the caching + * properties specified by "flags". + */ +#define MAP_NOCACHE (0) +#define MAP_WRCOMBINE (0) +#define MAP_WRBACK (0) +#define MAP_WRTHROUGH (0) + +static inline void * +map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) +{ + return (void *)((unsigned long)paddr); +} + +/* + * Take down a mapping set up by map_physmem(). + */ +static inline void unmap_physmem(void *vaddr, unsigned long flags) +{ + +} + static inline void sync(void) { /* Not yet implemented */ |