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