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| author | Chris Zankel <czankel@tensilica.com> | 2005-06-23 22:01:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-24 00:05:22 -0700 |
| commit | 9a8fd5589902153a134111ed7a40f9cca1f83254 (patch) | |
| tree | 6f7a06de25bdf0b2d94623794c2cbbc66b5a77f6 /include/asm-xtensa/scatterlist.h | |
| parent | 3f65ce4d141e435e54c20ed2379d983d362a2cb5 (diff) | |
| download | lwn-9a8fd5589902153a134111ed7a40f9cca1f83254.tar.gz lwn-9a8fd5589902153a134111ed7a40f9cca1f83254.zip | |
[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 6
The attached patches provides part 6 of an architecture implementation for the
Tensilica Xtensa CPU series.
Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-xtensa/scatterlist.h')
| -rw-r--r-- | include/asm-xtensa/scatterlist.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/asm-xtensa/scatterlist.h b/include/asm-xtensa/scatterlist.h new file mode 100644 index 000000000000..38a2b9acd658 --- /dev/null +++ b/include/asm-xtensa/scatterlist.h @@ -0,0 +1,34 @@ +/* + * include/asm-xtensa/scatterlist.h + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2001 - 2005 Tensilica Inc. + */ + +#ifndef _XTENSA_SCATTERLIST_H +#define _XTENSA_SCATTERLIST_H + +struct scatterlist { + struct page *page; + unsigned int offset; + dma_addr_t dma_address; + unsigned int length; +}; + +/* + * These macros should be used after a pci_map_sg call has been done + * to get bus addresses of each of the SG entries and their lengths. + * You should only work with the number of sg entries pci_map_sg + * returns, or alternatively stop on the first sg_dma_len(sg) which + * is 0. + */ +#define sg_dma_address(sg) ((sg)->dma_address) +#define sg_dma_len(sg) ((sg)->length) + + +#define ISA_DMA_THRESHOLD (~0UL) + +#endif /* _XTENSA_SCATTERLIST_H */ |