patch-2.4.2 linux/include/asm-cris/svinto.h

• Lines: 47
• Date: Thu Feb 8 16:32:44 2001
• Orig file: v2.4.1/linux/include/asm-cris/svinto.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/include/asm-cris/svinto.h linux/include/asm-cris/svinto.h
@@ -0,0 +1,46 @@
+#ifndef _ASM_CRIS_SVINTO_H
+#define _ASM_CRIS_SVINTO_H
+
+#include "sv_addr_ag.h"
+
+extern unsigned int genconfig_shadow; /* defined and set in head.S */
+
+/* dma stuff */
+
+enum {                          /* Available in:  */
+	d_eol      = (1 << 0),  /* flags          */
+	d_eop      = (1 << 1),  /* flags & status */
+	d_wait     = (1 << 2),  /* flags          */
+	d_int      = (1 << 3),  /* flags          */
+	d_txerr    = (1 << 4),  /* flags          */
+	d_stop     = (1 << 4),  /*         status */
+	d_ecp      = (1 << 4),  /* flags & status */
+	d_pri      = (1 << 5),  /* flags & status */
+	d_alignerr = (1 << 6),  /*         status */
+	d_crcerr   = (1 << 7)   /*         status */
+};
+
+/* Do remember that DMA does not go through the MMU and needs
+ * a real physical address, not an address virtually mapped or
+ * paged. Therefore the buf/next ptrs below are unsigned long instead
+ * of void * to give a warning if you try to put a pointer directly
+ * to them instead of going through virt_to_phys/phys_to_virt.
+ */
+
+typedef struct etrax_dma_descr {
+	unsigned short sw_len;                /* 0-1 */
+	unsigned short ctrl;                  /* 2-3 */
+	unsigned long  next;                  /* 4-7 */
+	unsigned long  buf;                   /* 8-11 */
+	unsigned short hw_len;                /* 12-13 */
+	unsigned short status;                /* 14-15 */
+} etrax_dma_descr;
+
+#define RESET_DMA( n ) \
+  *R_DMA_CH##n##_CMD = IO_STATE( R_DMA_CH0_CMD, cmd, reset )
+
+#define WAIT_DMA( n ) \
+  while( (*R_DMA_CH##n##_CMD & IO_MASK( R_DMA_CH0_CMD, cmd )) != \
+         IO_STATE( R_DMA_CH0_CMD, cmd, hold ) )
+
+#endif