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Diffstat (limited to 'arch/cris/arch-v10/lib/dmacopy.c')
-rw-r--r--arch/cris/arch-v10/lib/dmacopy.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/cris/arch-v10/lib/dmacopy.c b/arch/cris/arch-v10/lib/dmacopy.c
new file mode 100644
index 000000000000..e5fb44f505c5
--- /dev/null
+++ b/arch/cris/arch-v10/lib/dmacopy.c
@@ -0,0 +1,43 @@
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
43