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

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