sf_buf.h revision 122780 
1/*-
2 * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/ia64/include/sf_buf.h 122780 2003-11-16 06:11:26Z alc $
27 */
28
29#ifndef _MACHINE_SF_BUF_H_
30#define _MACHINE_SF_BUF_H_
31
32#include <sys/queue.h>
33
34#include <vm/vm.h>
35#include <vm/vm_param.h>
36#include <vm/vm_page.h>
37
38struct sf_buf {
39	SLIST_ENTRY(sf_buf) free_list;	/* list of free buffer slots */
40	vm_page_t m;			/* currently mapped page */
41};
42
43static __inline vm_offset_t
44sf_buf_kva(struct sf_buf *sf)
45{
46
47	return (IA64_PHYS_TO_RR7(sf->m->phys_addr));
48}
49
50static __inline vm_page_t
51sf_buf_page(struct sf_buf *sf)
52{
53
54	return (sf->m);
55}
56
57#endif /* !_MACHINE_SF_BUF_H_ */
58