| #ifndef __ASM_NIOS2_DMA_MAPPING_H |
| #define __ASM_NIOS2_DMA_MAPPING_H |
| |
| #include <memalign.h> |
| #include <asm/io.h> |
| |
| /* |
| * dma_alloc_coherent() return cache-line aligned allocation which is mapped |
| * to uncached io region. |
| */ |
| static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) |
| { |
| unsigned long addr = (unsigned long)malloc_cache_aligned(len); |
| |
| if (!addr) |
| return NULL; |
| |
| invalidate_dcache_range(addr, addr + len); |
| if (handle) |
| *handle = addr; |
| |
| return map_physmem(addr, len, MAP_NOCACHE); |
| } |
| #endif /* __ASM_NIOS2_DMA_MAPPING_H */ |
