include/asm-sh64/scatterlist.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * include/asm-sh64/scatterlist.h
   7  *
   8  * Copyright (C) 2003  Paul Mundt
   9  *
  10  */
  11 #ifndef __ASM_SH64_SCATTERLIST_H
  12 #define __ASM_SH64_SCATTERLIST_H
  13
  14 #include <asm/types.h>
  15
  16 struct scatterlist {
  17 #ifdef CONFIG_DEBUG_SG
  18     unsigned long sg_magic;
  19 #endif
  20     unsigned long page_link;
  21     unsigned int offset;/* for highmem, page offset */
  22     dma_addr_t dma_address;
  23     unsigned int length;
  24 };
  25
  26 /* These macros should be used after a pci_map_sg call has been done
  27  * to get bus addresses of each of the SG entries and their lengths.
  28  * You should only work with the number of sg entries pci_map_sg
  29  * returns, or alternatively stop on the first sg_dma_len(sg) which
  30  * is 0.
  31  */
  32 #define sg_dma_address(sg)      ((sg)->dma_address)
  33 #define sg_dma_len(sg)          ((sg)->length)
  34
  35 #define ISA_DMA_THRESHOLD (0xffffffff)
  36
  37 #endif /* !__ASM_SH64_SCATTERLIST_H */