1 #ifndef _ASMARM_SCATTERLIST_H
2 #define _ASMARM_SCATTERLIST_H
3
4 #include <asm/types.h>
5
6 struct scatterlist {
7 char *address; /* virtual address */
8 char *alt_address; /* indirect dma address, or NULL */
9 dma_addr_t dma_address; /* dma address */
10 unsigned int length; /* length */
11 };
12
13 /*
14 * These macros should be used after a pci_map_sg call has been done
15 * to get bus addresses of each of the SG entries and their lengths.
16 * You should only work with the number of sg entries pci_map_sg
17 * returns, or alternatively stop on the first sg_dma_len(sg) which
18 * is 0.
19 */
20 #define sg_dma_address(sg) ((sg)->dma_address)
21 #define sg_dma_len(sg) ((sg)->length)
22
23 #define ISA_DMA_THRESHOLD (0xffffffff)
24
25 #endif /* _ASMARM_SCATTERLIST_H */
26
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