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Diffstat (limited to 'arch/xtensa/include/asm/scatterlist.h')
| -rw-r--r-- | arch/xtensa/include/asm/scatterlist.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/scatterlist.h b/arch/xtensa/include/asm/scatterlist.h new file mode 100644 index 00000000000..810080bb0a2 --- /dev/null +++ b/arch/xtensa/include/asm/scatterlist.h @@ -0,0 +1,39 @@ +/* + * 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 + +#include <asm/types.h> + +struct scatterlist { +#ifdef CONFIG_DEBUG_SG + unsigned long sg_magic; +#endif + unsigned long page_link; + 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 */ |