LXR linux/arch/arm/mm/dma.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef DMA_H
   3#define DMA_H
   4
   5#include <asm/glue-cache.h>
   6
   7#ifndef MULTI_CACHE
   8#define dmac_map_area                   __glue(_CACHE,_dma_map_area)
   9#define dmac_unmap_area                 __glue(_CACHE,_dma_unmap_area)
  10
  11/*
  12 * These are private to the dma-mapping API.  Do not use directly.
  13 * Their sole purpose is to ensure that data held in the cache
  14 * is visible to DMA, or data written by DMA to system memory is
  15 * visible to the CPU.
  16 */
  17extern void dmac_map_area(const void *, size_t, int);
  18extern void dmac_unmap_area(const void *, size_t, int);
  19
  20#else
  21
  22/*
  23 * These are private to the dma-mapping API.  Do not use directly.
  24 * Their sole purpose is to ensure that data held in the cache
  25 * is visible to DMA, or data written by DMA to system memory is
  26 * visible to the CPU.
  27 */
  28#define dmac_map_area                   cpu_cache.dma_map_area
  29#define dmac_unmap_area                 cpu_cache.dma_unmap_area
  30
  31#endif
  32
  33#endif
  34