git.sur5r.net Git - u-boot/blob - arch/arm/include/asm/dma-mapping.h

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