diff options
Diffstat (limited to 'arch/nds32/include/asm')
| -rw-r--r-- | arch/nds32/include/asm/io.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/nds32/include/asm/io.h b/arch/nds32/include/asm/io.h index b2c4d0ef8c..e8ee961526 100644 --- a/arch/nds32/include/asm/io.h +++ b/arch/nds32/include/asm/io.h @@ -48,6 +48,27 @@ static inline void sync(void) #define MAP_WRBACK (0) #define MAP_WRTHROUGH (0) +#ifdef CONFIG_ARCH_MAP_SYSMEM +static inline void *map_sysmem(phys_addr_t paddr, unsigned long len) +{ + if(paddr <PHYS_SDRAM_0_SIZE + PHYS_SDRAM_1_SIZE) + paddr = paddr | 0x40000000; + return (void *)(uintptr_t)paddr; +} + +static inline void *unmap_sysmem(const void *vaddr) +{ + phys_addr_t paddr = (phys_addr_t)vaddr; + paddr = paddr & ~0x40000000; + return (void *)(uintptr_t)paddr; +} + +static inline phys_addr_t map_to_sysmem(const void *ptr) +{ + return (phys_addr_t)(uintptr_t)ptr; +} +#endif + static inline void * map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) { |