include/asm-mips/mach-generic/dma-coherence.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2006  Ralf Baechle <ralf@linux-mips.org>
   7  *
   8  */
   9 #ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H
  10 #define __ASM_MACH_GENERIC_DMA_COHERENCE_H
  11
  12 struct device;
  13
  14 static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
  15         size_t size)
  16 {
  17         return virt_to_phys(addr);
  18 }
  19
  20 static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
  21         struct page *page)
  22 {
  23         return page_to_phys(page);
  24 }
  25
  26 static inline unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
  27 {
  28         return dma_addr;
  29 }
  30
  31 static inline void plat_unmap_dma_mem(dma_addr_t dma_addr)
  32 {
  33 }
  34
  35 static inline int plat_device_is_coherent(struct device *dev)
  36 {
  37 #ifdef CONFIG_DMA_COHERENT
  38         return 1;
  39 #endif
  40 #ifdef CONFIG_DMA_NONCOHERENT
  41         return 0;
  42 #endif
  43 }
  44
  45 #endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */