44 lines
909 B
C
44 lines
909 B
C
|
/* $Id: dmacopy.c,v 1.1 2001/12/17 13:59:27 bjornw Exp $
|
||
|
|
*
|
||
|
|
* memcpy for large blocks, using memory-memory DMA channels 6 and 7 in Etrax
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <asm/svinto.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
|
||
|
|
#define D(x)
|
||
|
|
|
||
|
|
void *dma_memcpy(void *pdst,
|
||
|
|
const void *psrc,
|
||
|
|
unsigned int pn)
|
||
|
|
{
|
||
|
|
static etrax_dma_descr indma, outdma;
|
||
|
|
|
||
|
|
D(printk("dma_memcpy %d bytes... ", pn));
|
||
|
|
|
||
|
|
#if 0
|
||
|
|
*R_GEN_CONFIG = genconfig_shadow =
|
||
|
|
(genconfig_shadow & ~0x3c0000) |
|
||
|
|
IO_STATE(R_GEN_CONFIG, dma6, intdma7) |
|
||
|
|
IO_STATE(R_GEN_CONFIG, dma7, intdma6);
|
||
|
|
#endif
|
||
|
|
indma.sw_len = outdma.sw_len = pn;
|
||
|
|
indma.ctrl = d_eol | d_eop;
|
||
|
|
outdma.ctrl = d_eol;
|
||
|
|
indma.buf = psrc;
|
||
|
|
outdma.buf = pdst;
|
||
|
|
|
||
|
|
*R_DMA_CH6_FIRST = &indma;
|
||
|
|
*R_DMA_CH7_FIRST = &outdma;
|
||
|
|
*R_DMA_CH6_CMD = IO_STATE(R_DMA_CH6_CMD, cmd, start);
|
||
|
|
*R_DMA_CH7_CMD = IO_STATE(R_DMA_CH7_CMD, cmd, start);
|
||
|
|
|
||
|
|
while(*R_DMA_CH7_CMD == 1) /* wait for completion */ ;
|
||
|
|
|
||
|
|
D(printk("done\n"));
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|