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- #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 */
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