linux/arch/cris/arch-v10/lib/dmacopy.c
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   1/* $Id: dmacopy.c,v 1.1 2001/12/17 13:59:27 bjornw Exp $ 
   2 *
   3 * memcpy for large blocks, using memory-memory DMA channels 6 and 7 in Etrax
   4 */
   5
   6#include <asm/svinto.h>
   7#include <asm/io.h>
   8
   9#define D(x)
  10
  11void *dma_memcpy(void *pdst,
  12                 const void *psrc,
  13                 unsigned int pn)
  14{
  15        static etrax_dma_descr indma, outdma;
  16        
  17        D(printk("dma_memcpy %d bytes... ", pn));
  18
  19#if 0
  20        *R_GEN_CONFIG = genconfig_shadow = 
  21                (genconfig_shadow & ~0x3c0000) |
  22                IO_STATE(R_GEN_CONFIG, dma6, intdma7) |
  23                IO_STATE(R_GEN_CONFIG, dma7, intdma6);
  24#endif
  25        indma.sw_len = outdma.sw_len = pn;
  26        indma.ctrl = d_eol | d_eop;
  27        outdma.ctrl = d_eol;
  28        indma.buf = psrc;
  29        outdma.buf = pdst;
  30
  31        *R_DMA_CH6_FIRST = &indma;
  32        *R_DMA_CH7_FIRST = &outdma;
  33        *R_DMA_CH6_CMD = IO_STATE(R_DMA_CH6_CMD, cmd, start);
  34        *R_DMA_CH7_CMD = IO_STATE(R_DMA_CH7_CMD, cmd, start);
  35        
  36        while(*R_DMA_CH7_CMD == 1) /* wait for completion */ ;
  37
  38        D(printk("done\n"));
  39
  40}
  41
  42
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  44