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
  36 extern int isa_dma_bridge_buggy;
  37 #else
  38 #define isa_dma_bridge_buggy    (0)
  39 #endif
  40
  41 #endif /* __ASM_SH64_DMA_H */