1 /* $OpenBSD: uvm_pager_i.h,v 1.10 2001/12/19 08:58:07 art Exp $ */
2 /* $NetBSD: uvm_pager_i.h,v 1.10 2000/11/25 06:28:00 chs Exp $ */
3
4 /*
5 *
6 * Copyright (c) 1997 Charles D. Cranor and Washington University.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Charles D. Cranor and
20 * Washington University.
21 * 4. The name of the author may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * from: Id: uvm_pager_i.h,v 1.1.2.2 1997/10/09 23:05:46 chuck Exp
36 */
37
38 #ifndef _UVM_UVM_PAGER_I_H_
39 #define _UVM_UVM_PAGER_I_H_
40
41 /*
42 * uvm_pager_i.h
43 */
44
45 /*
46 * inline functions [maybe]
47 */
48
49 #if defined(UVM_PAGER_INLINE) || defined(UVM_PAGER)
50
51 /*
52 * uvm_pageratop: convert KVAs in the pager map back to their page
53 * structures.
54 */
55
56 PAGER_INLINE struct vm_page *
uvm_pageratop(kva)57 uvm_pageratop(kva)
58 vaddr_t kva;
59 {
60 struct vm_page *pg;
61 paddr_t pa;
62 boolean_t rv;
63
64 rv = pmap_extract(pmap_kernel(), kva, &pa);
65 KASSERT(rv);
66 pg = PHYS_TO_VM_PAGE(pa);
67 KASSERT(pg != NULL);
68 return (pg);
69 }
70
71 #endif /* defined(UVM_PAGER_INLINE) || defined(UVM_PAGER) */
72
73 #endif /* _UVM_UVM_PAGER_I_H_ */
74