1/*
2 * include/asm-xtensa/scatterlist.h
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License.  See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2001 - 2005 Tensilica Inc.
9 */
10
11#ifndef _XTENSA_SCATTERLIST_H
12#define _XTENSA_SCATTERLIST_H
13
14#include <asm/types.h>
15
16struct scatterlist {
17	struct page 	*page;
18	unsigned int	offset;
19	dma_addr_t	dma_address;
20	unsigned int	length;
21};
22
23/*
24 * These macros should be used after a pci_map_sg call has been done
25 * to get bus addresses of each of the SG entries and their lengths.
26 * You should only work with the number of sg entries pci_map_sg
27 * returns, or alternatively stop on the first sg_dma_len(sg) which
28 * is 0.
29 */
30#define sg_dma_address(sg)      ((sg)->dma_address)
31#define sg_dma_len(sg)          ((sg)->length)
32
33
34#define ISA_DMA_THRESHOLD (~0UL)
35
36#endif	/* _XTENSA_SCATTERLIST_H */
37