| /* $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")); |
| |
| } |
| |
| |
| |
