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

   1/*
   2 * (C) Copyright 2007
   3 * Stelian Pop <stelian@popies.net>
   4 * Lead Tech Design <www.leadtechdesign.com>
   5 *
   6 * SPDX-License-Identifier:     GPL-2.0+
   7 */
   8#ifndef __ASM_ARM_DMA_MAPPING_H
   9#define __ASM_ARM_DMA_MAPPING_H
  10
  11#define dma_mapping_error(x, y) 0
  12
  13enum dma_data_direction {
  14        DMA_BIDIRECTIONAL       = 0,
  15        DMA_TO_DEVICE           = 1,
  16        DMA_FROM_DEVICE         = 2,
  17};
  18
  19static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
  20{
  21        *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
  22        return (void *)*handle;
  23}
  24
  25static inline void dma_free_coherent(void *addr)
  26{
  27        free(addr);
  28}
  29
  30static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
  31                                           enum dma_data_direction dir)
  32{
  33        return (unsigned long)vaddr;
  34}
  35
  36static inline void dma_unmap_single(volatile void *vaddr, size_t len,
  37                                    unsigned long paddr)
  38{
  39}
  40
  41#endif /* __ASM_ARM_DMA_MAPPING_H */
  42