uvm_page.h revision 1.4 
1/*	$NetBSD: uvm_page.h,v 1.12 1999/05/24 19:10:57 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 1997 Charles D. Cranor and Washington University.
5 * Copyright (c) 1991, 1993, The Regents of the University of California.
6 *
7 * All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * The Mach Operating System project at Carnegie-Mellon University.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 *    must display the following acknowledgement:
22 *	This product includes software developed by Charles D. Cranor,
23 *      Washington University, the University of California, Berkeley and
24 *      its contributors.
25 * 4. Neither the name of the University nor the names of its contributors
26 *    may be used to endorse or promote products derived from this software
27 *    without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * SUCH DAMAGE.
40 *
41 *	@(#)vm_page.h   7.3 (Berkeley) 4/21/91
42 * from: Id: uvm_page.h,v 1.1.2.6 1998/02/04 02:31:42 chuck Exp
43 *
44 *
45 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
46 * All rights reserved.
47 *
48 * Permission to use, copy, modify and distribute this software and
49 * its documentation is hereby granted, provided that both the copyright
50 * notice and this permission notice appear in all copies of the
51 * software, derivative works or modified versions, and any portions
52 * thereof, and that both notices appear in supporting documentation.
53 *
54 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
55 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
56 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
57 *
58 * Carnegie Mellon requests users of this software to return to
59 *
60 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
61 *  School of Computer Science
62 *  Carnegie Mellon University
63 *  Pittsburgh PA 15213-3890
64 *
65 * any improvements or extensions that they make and grant Carnegie the
66 * rights to redistribute these changes.
67 */
68
69#ifndef _UVM_UVM_PAGE_H_
70#define _UVM_UVM_PAGE_H_
71
72/*
73 * uvm_page.h
74 */
75
76/*
77 * macros
78 */
79
80#define uvm_lock_pageq()	simple_lock(&uvm.pageqlock)
81#define uvm_unlock_pageq()	simple_unlock(&uvm.pageqlock)
82
83#define uvm_pagehash(obj,off) \
84	(((unsigned long)obj+(unsigned long)atop(off)) & uvm.page_hashmask)
85
86/*
87 * handle inline options
88 */
89
90#ifdef UVM_PAGE_INLINE
91#define PAGE_INLINE static __inline
92#else
93#define PAGE_INLINE /* nothing */
94#endif /* UVM_PAGE_INLINE */
95
96/*
97 * prototypes: the following prototypes define the interface to pages
98 */
99
100void uvm_page_init __P((vaddr_t *, vaddr_t *));
101#if defined(UVM_PAGE_TRKOWN)
102void uvm_page_own __P((struct vm_page *, char *));
103#endif
104#if !defined(PMAP_STEAL_MEMORY)
105boolean_t uvm_page_physget __P((paddr_t *));
106#endif
107void uvm_page_rehash __P((void));
108
109PAGE_INLINE int uvm_lock_fpageq __P((void));
110PAGE_INLINE void uvm_unlock_fpageq __P((int));
111
112PAGE_INLINE void uvm_pageactivate __P((struct vm_page *));
113vaddr_t uvm_pageboot_alloc __P((vsize_t));
114PAGE_INLINE void uvm_pagecopy __P((struct vm_page *, struct vm_page *));
115PAGE_INLINE void uvm_pagedeactivate __P((struct vm_page *));
116void uvm_pagefree __P((struct vm_page *));
117PAGE_INLINE struct vm_page *uvm_pagelookup
118					__P((struct uvm_object *, vaddr_t));
119void uvm_pageremove __P((struct vm_page *));
120/* uvm_pagerename: not needed */
121PAGE_INLINE void uvm_pageunwire __P((struct vm_page *));
122PAGE_INLINE void uvm_pagewait __P((struct vm_page *, int));
123PAGE_INLINE void uvm_pagewake __P((struct vm_page *));
124PAGE_INLINE void uvm_pagewire __P((struct vm_page *));
125PAGE_INLINE void uvm_pagezero __P((struct vm_page *));
126
127PAGE_INLINE int uvm_page_lookup_freelist __P((struct vm_page *));
128
129#endif /* _UVM_UVM_PAGE_H_ */
130