path: root/arch/sh/include/asm/scatterlist.h

#ifndef __ASM_SH_SCATTERLIST_H
#define __ASM_SH_SCATTERLIST_H

#include <asm/types.h>

struct scatterlist {
#ifdef CONFIG_DEBUG_SG
	unsigned long	sg_magic;
#endif
	unsigned long	page_link;
	unsigned int	offset;		/* for highmem, page offset */
	unsigned int	length;
	dma_addr_t	dma_address;
	unsigned int	dma_length;
};

#define ISA_DMA_THRESHOLD	PHYS_ADDR_MASK

/* 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)

#endif /* !(__ASM_SH_SCATTERLIST_H) */