arch/arm/include/asm/hardware/memc.h

   1 /*
   2  *  arch/arm/include/asm/hardware/memc.h
   3  *
   4  *  Copyright (C) Russell King.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #define VDMA_ALIGNMENT  PAGE_SIZE
  11 #define VDMA_XFERSIZE   16
  12 #define VDMA_INIT       0
  13 #define VDMA_START      1
  14 #define VDMA_END        2
  15
  16 #ifndef __ASSEMBLY__
  17 extern void memc_write(unsigned int reg, unsigned long val);
  18
  19 #define video_set_dma(start,end,offset)                         \
  20 do {                                                            \
  21         memc_write (VDMA_START, (start >> 2));                  \
  22         memc_write (VDMA_END, (end - VDMA_XFERSIZE) >> 2);      \
  23         memc_write (VDMA_INIT, (offset >> 2));                  \
  24 } while (0)
  25
  26 #endif