kernel-ark/arch/cris/arch-v10/lib/dmacopy.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

44 lines
909 B
C

/* $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"));
}