1 /*
2 * memcpy for large blocks, using memory-memory DMA channels 6 and 7 in Etrax
3 */
4
5 #include <asm/svinto.h>
6 #include <asm/io.h>
7
8 #define D(x)
9
dma_memcpy(void * pdst,const void * psrc,unsigned int pn)10 void *dma_memcpy(void *pdst,
11 const void *psrc,
12 unsigned int pn)
13 {
14 static etrax_dma_descr indma, outdma;
15
16 D(printk(KERN_DEBUG "dma_memcpy %d bytes... ", pn));
17
18 #if 0
19 *R_GEN_CONFIG = genconfig_shadow =
20 (genconfig_shadow & ~0x3c0000) |
21 IO_STATE(R_GEN_CONFIG, dma6, intdma7) |
22 IO_STATE(R_GEN_CONFIG, dma7, intdma6);
23 #endif
24 indma.sw_len = outdma.sw_len = pn;
25 indma.ctrl = d_eol | d_eop;
26 outdma.ctrl = d_eol;
27 indma.buf = psrc;
28 outdma.buf = pdst;
29
30 *R_DMA_CH6_FIRST = &indma;
31 *R_DMA_CH7_FIRST = &outdma;
32 *R_DMA_CH6_CMD = IO_STATE(R_DMA_CH6_CMD, cmd, start);
33 *R_DMA_CH7_CMD = IO_STATE(R_DMA_CH7_CMD, cmd, start);
34
35 while (*R_DMA_CH7_CMD == 1)
36 /* wait for completion */;
37
38 D(printk(KERN_DEBUG "done\n"));
39 }
40
41
42
43