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

   1 /*
   2  * (C) Copyright 2007
   3  * Stelian Pop <stelian.pop@leadtechdesign.com>
   4  * Lead Tech Design <www.leadtechdesign.com>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24 #ifndef __ASM_ARM_DMA_MAPPING_H
  25 #define __ASM_ARM_DMA_MAPPING_H
  26
  27 enum dma_data_direction {
  28         DMA_BIDIRECTIONAL       = 0,
  29         DMA_TO_DEVICE           = 1,
  30         DMA_FROM_DEVICE         = 2,
  31 };
  32
  33 static void *dma_alloc_coherent(size_t len, unsigned long *handle)
  34 {
  35         *handle = (unsigned long)malloc(len);
  36         return (void *)*handle;
  37 }
  38
  39 static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
  40                                            enum dma_data_direction dir)
  41 {
  42         return (unsigned long)vaddr;
  43 }
  44
  45 static inline void dma_unmap_single(volatile void *vaddr, size_t len,
  46                                     unsigned long paddr)
  47 {
  48 }
  49
  50 #endif /* __ASM_ARM_DMA_MAPPING_H */