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 10void *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 indma.sw_len = outdma.sw_len = pn; 19 indma.ctrl = d_eol | d_eop; 20 outdma.ctrl = d_eol; 21 indma.buf = psrc; 22 outdma.buf = pdst; 23 24 *R_DMA_CH6_FIRST = &indma; 25 *R_DMA_CH7_FIRST = &outdma; 26 *R_DMA_CH6_CMD = IO_STATE(R_DMA_CH6_CMD, cmd, start); 27 *R_DMA_CH7_CMD = IO_STATE(R_DMA_CH7_CMD, cmd, start); 28 29 while (*R_DMA_CH7_CMD == 1) 30 /* wait for completion */; 31 32 D(printk(KERN_DEBUG "done\n")); 33} 34