1 /* $Id: dmacopy.c,v 1.1 2001/12/17 13:59:27 bjornw Exp $
3 * memcpy for large blocks, using memory-memory DMA channels 6 and 7 in Etrax
6 #include <asm/svinto.h>
11 void *dma_memcpy(void *pdst,
15 static etrax_dma_descr indma, outdma;
17 D(printk("dma_memcpy %d bytes... ", pn));
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);
25 indma.sw_len = outdma.sw_len = pn;
26 indma.ctrl = d_eol | d_eop;
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);
36 while(*R_DMA_CH7_CMD == 1) /* wait for completion */ ;