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
dma_memcpy(void * pdst,const void * psrc,unsigned int pn)11 void *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
43
44