scatterlist.h

嵌入式系统设计与实例开发实验教材二源码 多线程应用程序设计 串行端口程序设计 AD接口实验 CAN总线通信实验 GPS通信实验 Linux内核移植与编译实验 IC卡读写实验 SD驱动使

#ifndef _ASM_IA64_SCATTERLIST_H
#define _ASM_IA64_SCATTERLIST_H

/*
 * Copyright (C) 1998, 1999, 2001 Hewlett-Packard Co
 *	David Mosberger-Tang <[e-mail]>
 */

struct scatterlist {
	/* This will disappear in 2.5.x: */
	char *address;		/* location data is to be transferred to, NULL for highmem page */
	char *orig_address;	/* for use by swiotlb */

	/* These two are only valid if ADDRESS member of this struct is NULL.  */
	struct page *page;
	unsigned int offset;

	unsigned int length;	/* buffer length */
};

#define ISA_DMA_THRESHOLD	(~0UL)

#endif /* _ASM_IA64_SCATTERLIST_H */