diff options
Diffstat (limited to 'arch/cris/arch-v10/lib/dmacopy.c')
| -rw-r--r-- | arch/cris/arch-v10/lib/dmacopy.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/cris/arch-v10/lib/dmacopy.c b/arch/cris/arch-v10/lib/dmacopy.c new file mode 100644 index 000000000..49f5b8ca5 --- /dev/null +++ b/arch/cris/arch-v10/lib/dmacopy.c @@ -0,0 +1,42 @@ +/* + * 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(KERN_DEBUG "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(KERN_DEBUG "done\n")); +} + + + |