LXR linux-bk/include/asm-sh64/dma.h

   1#ifndef __ASM_SH64_DMA_H
   2#define __ASM_SH64_DMA_H
   3
   4/*
   5 * This file is subject to the terms and conditions of the GNU General Public
   6 * License.  See the file "COPYING" in the main directory of this archive
   7 * for more details.
   8 *
   9 * include/asm-sh64/dma.h
  10 *
  11 * Copyright (C) 2000, 2001  Paolo Alberelli
  12 * Copyright (C) 2003  Paul Mundt
  13 *
  14 */
  15
  16#include <linux/mm.h>
  17#include <asm/io.h>
  18#include <asm/pgtable.h>
  19
  20#define MAX_DMA_CHANNELS        4
  21
  22/*
  23 * SH5 can DMA in any memory area.
  24 *
  25 * The static definition is dodgy because it should limit
  26 * the highest DMA-able address based on the actual
  27 * Physical memory available. This is actually performed
  28 * at run time in defining the memory allowed to DMA_ZONE.
  29 */
  30#define MAX_DMA_ADDRESS         ~(NPHYS_MASK)
  31
  32#define DMA_MODE_READ           0
  33#define DMA_MODE_WRITE          1
  34
  35#ifdef CONFIG_PCI
  36extern int isa_dma_bridge_buggy;
  37#else
  38#define isa_dma_bridge_buggy    (0)
  39#endif
  40
  41#endif /* __ASM_SH64_DMA_H */
  42