LXR uboot/arch/nios2/include/asm/dma-mapping.h

   1#ifndef __ASM_NIOS2_DMA_MAPPING_H
   2#define __ASM_NIOS2_DMA_MAPPING_H
   3
   4#include <memalign.h>
   5#include <asm/io.h>
   6
   7/*
   8 * dma_alloc_coherent() return cache-line aligned allocation which is mapped
   9 * to uncached io region.
  10 */
  11static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
  12{
  13        unsigned long addr = (unsigned long)malloc_cache_aligned(len);
  14
  15        if (!addr)
  16                return NULL;
  17
  18        invalidate_dcache_range(addr, addr + len);
  19        if (handle)
  20                *handle = addr;
  21
  22        return map_physmem(addr, len, MAP_NOCACHE);
  23}
  24#endif /* __ASM_NIOS2_DMA_MAPPING_H */
  25