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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
14struct scatterlist {
15 struct page *page;
16 unsigned int offset;
17 dma_addr_t dma_address;
18 unsigned int length;
19};
20
21/*
22 * These macros should be used after a pci_map_sg call has been done
23 * to get bus addresses of each of the SG entries and their lengths.
24 * You should only work with the number of sg entries pci_map_sg
25 * returns, or alternatively stop on the first sg_dma_len(sg) which
26 * is 0.
27 */
28#define sg_dma_address(sg) ((sg)->dma_address)
29#define sg_dma_len(sg) ((sg)->length)
30
31
32#define ISA_DMA_THRESHOLD (~0UL)
33
34#endif /* _XTENSA_SCATTERLIST_H */