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

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  arch/arm/include/asm/hardware/memc.h
   4  *
   5  *  Copyright (C) Russell King.
   6  */
   7 #define VDMA_ALIGNMENT  PAGE_SIZE
   8 #define VDMA_XFERSIZE   16
   9 #define VDMA_INIT       0
  10 #define VDMA_START      1
  11 #define VDMA_END        2
  12
  13 #ifndef __ASSEMBLY__
  14 extern void memc_write(unsigned int reg, unsigned long val);
  15
  16 #define video_set_dma(start,end,offset)                         \
  17 do {                                                            \
  18         memc_write (VDMA_START, (start >> 2));                  \
  19         memc_write (VDMA_END, (end - VDMA_XFERSIZE) >> 2);      \
  20         memc_write (VDMA_INIT, (offset >> 2));                  \
  21 } while (0)
  22
  23 #endif