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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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