include/asm-mips/mach-lemote/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, 07  Ralf Baechle <ralf@linux-mips.org>
   7  * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
   8  * Author: Fuxin Zhang, zhangfx@lemote.com
   9  *
  10  */
  11 #ifndef __ASM_MACH_LEMOTE_DMA_COHERENCE_H
  12 #define __ASM_MACH_LEMOTE_DMA_COHERENCE_H
  13
  14 struct device;
  15
  16 static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
  17                                           size_t size)
  18 {
  19         return virt_to_phys(addr) | 0x80000000;
  20 }
  21
  22 static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
  23                                                struct page *page)
  24 {
  25         return page_to_phys(page) | 0x80000000;
  26 }
  27
  28 static inline unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
  29 {
  30         return dma_addr & 0x7fffffff;
  31 }
  32
  33 static inline void plat_unmap_dma_mem(dma_addr_t dma_addr)
  34 {
  35 }
  36
  37 static inline int plat_device_is_coherent(struct device *dev)
  38 {
  39         return 0;
  40 }
  41
  42 #endif /* __ASM_MACH_LEMOTE_DMA_COHERENCE_H */