LXR uboot/arch/nds32/include/asm/dma-mapping.h

   1/*
   2 * Copyright (C) 2013 Andes Technology Corporation
   3 * Ken Kuo, Andes Technology Corporation <ken_kuo@andestech.com>
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7#ifndef __ASM_NDS_DMA_MAPPING_H
   8#define __ASM_NDS_DMA_MAPPING_H
   9
  10enum dma_data_direction {
  11        DMA_BIDIRECTIONAL       = 0,
  12        DMA_TO_DEVICE           = 1,
  13        DMA_FROM_DEVICE         = 2,
  14};
  15
  16static void *dma_alloc_coherent(size_t len, unsigned long *handle)
  17{
  18        *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
  19        return (void *)*handle;
  20}
  21
  22static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
  23                                           enum dma_data_direction dir)
  24{
  25        return (unsigned long)vaddr;
  26}
  27
  28static inline void dma_unmap_single(volatile void *vaddr, size_t len,
  29                                    unsigned long paddr)
  30{
  31}
  32
  33#endif /* __ASM_NDS_DMA_MAPPING_H */
  34