patch-2.4.2 linux/arch/cris/lib/dmacopy.c
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- Lines: 44
- Date:
Thu Feb 8 16:32:44 2001
- Orig file:
v2.4.1/linux/arch/cris/lib/dmacopy.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.1/linux/arch/cris/lib/dmacopy.c linux/arch/cris/lib/dmacopy.c
@@ -0,0 +1,43 @@
+/* $Id: dmacopy.c,v 1.1 2000/07/10 16:25:21 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"));
+
+}
+
+
+
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