| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | |
| 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 | |