| #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 */ |