43 lines
871 B
C
43 lines
871 B
C
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/*
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* memcpy for large blocks, using memory-memory DMA channels 6 and 7 in Etrax
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*/
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#include <asm/svinto.h>
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#include <asm/io.h>
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#define D(x)
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void *dma_memcpy(void *pdst,
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const void *psrc,
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unsigned int pn)
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{
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static etrax_dma_descr indma, outdma;
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D(printk(KERN_DEBUG "dma_memcpy %d bytes... ", pn));
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#if 0
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*R_GEN_CONFIG = genconfig_shadow =
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(genconfig_shadow & ~0x3c0000) |
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IO_STATE(R_GEN_CONFIG, dma6, intdma7) |
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IO_STATE(R_GEN_CONFIG, dma7, intdma6);
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#endif
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indma.sw_len = outdma.sw_len = pn;
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indma.ctrl = d_eol | d_eop;
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outdma.ctrl = d_eol;
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indma.buf = psrc;
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outdma.buf = pdst;
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*R_DMA_CH6_FIRST = &indma;
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*R_DMA_CH7_FIRST = &outdma;
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*R_DMA_CH6_CMD = IO_STATE(R_DMA_CH6_CMD, cmd, start);
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*R_DMA_CH7_CMD = IO_STATE(R_DMA_CH7_CMD, cmd, start);
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while (*R_DMA_CH7_CMD == 1)
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/* wait for completion */;
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D(printk(KERN_DEBUG "done\n"));
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}
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