1 | /* $NetBSD: uvm_pager.h,v 1.43 2012/04/29 22:54:01 chs Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1997 Charles D. Cranor and Washington University. |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * |
27 | * from: Id: uvm_pager.h,v 1.1.2.14 1998/01/13 19:00:50 chuck Exp |
28 | */ |
29 | |
30 | /* |
31 | * Copyright (c) 1991, 1993 |
32 | * The Regents of the University of California. All rights reserved. |
33 | * |
34 | * This code is derived from software contributed to Berkeley by |
35 | * the Systems Programming Group of the University of Utah Computer |
36 | * Science Department. |
37 | * |
38 | * Redistribution and use in source and binary forms, with or without |
39 | * modification, are permitted provided that the following conditions |
40 | * are met: |
41 | * 1. Redistributions of source code must retain the above copyright |
42 | * notice, this list of conditions and the following disclaimer. |
43 | * 2. Redistributions in binary form must reproduce the above copyright |
44 | * notice, this list of conditions and the following disclaimer in the |
45 | * documentation and/or other materials provided with the distribution. |
46 | * 3. Neither the name of the University nor the names of its contributors |
47 | * may be used to endorse or promote products derived from this software |
48 | * without specific prior written permission. |
49 | * |
50 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
51 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
52 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
53 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
54 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
55 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
56 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
57 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
58 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
59 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
60 | * SUCH DAMAGE. |
61 | * |
62 | * @(#)vm_pager.h 8.5 (Berkeley) 7/7/94 |
63 | */ |
64 | |
65 | /* |
66 | * Copyright (c) 1990 University of Utah. |
67 | * |
68 | * This code is derived from software contributed to Berkeley by |
69 | * the Systems Programming Group of the University of Utah Computer |
70 | * Science Department. |
71 | * |
72 | * Redistribution and use in source and binary forms, with or without |
73 | * modification, are permitted provided that the following conditions |
74 | * are met: |
75 | * 1. Redistributions of source code must retain the above copyright |
76 | * notice, this list of conditions and the following disclaimer. |
77 | * 2. Redistributions in binary form must reproduce the above copyright |
78 | * notice, this list of conditions and the following disclaimer in the |
79 | * documentation and/or other materials provided with the distribution. |
80 | * 3. Neither the name of the University nor the names of its contributors |
81 | * may be used to endorse or promote products derived from this software |
82 | * without specific prior written permission. |
83 | * |
84 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
85 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
86 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
87 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
88 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
89 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
90 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
91 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
92 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
93 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
94 | * SUCH DAMAGE. |
95 | * |
96 | * @(#)vm_pager.h 8.5 (Berkeley) 7/7/94 |
97 | */ |
98 | |
99 | #ifndef _UVM_UVM_PAGER_H_ |
100 | #define |
101 | |
102 | /* |
103 | * uvm_pager.h |
104 | */ |
105 | |
106 | /* |
107 | * forward structure declarations |
108 | */ |
109 | |
110 | struct uvm_faultinfo; |
111 | |
112 | /* |
113 | * pager ops |
114 | */ |
115 | |
116 | struct { |
117 | |
118 | /* init pager */ |
119 | void (*)(void); |
120 | |
121 | /* add reference to obj */ |
122 | void (*)(struct uvm_object *); |
123 | |
124 | /* drop reference to obj */ |
125 | void (*)(struct uvm_object *); |
126 | |
127 | /* special non-standard fault processing */ |
128 | int (*)(struct uvm_faultinfo *, vaddr_t, struct vm_page **, |
129 | int, int, vm_prot_t, int); |
130 | |
131 | /* get/read pages */ |
132 | int (*)(struct uvm_object *, voff_t, struct vm_page **, |
133 | int *, int, vm_prot_t, int, int); |
134 | |
135 | /* put/write pages */ |
136 | int (*)(struct uvm_object *, voff_t, voff_t, int); |
137 | }; |
138 | |
139 | /* pager flags [mostly for flush] */ |
140 | |
141 | #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */ |
142 | #define PGO_SYNCIO 0x002 /* use sync I/O */ |
143 | #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */ |
144 | #define PGO_FREE 0x008 /* free flushed pages */ |
145 | /* if PGO_FREE is not set then the pages stay where they are. */ |
146 | |
147 | #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */ |
148 | #define PGO_JOURNALLOCKED 0x020 /* journal is already locked [put] */ |
149 | #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */ |
150 | #define PGO_BUSYFAIL 0x080 /* fail if a page is busy [put] */ |
151 | #define PGO_OVERWRITE 0x200 /* pages will be overwritten before unlocked */ |
152 | #define PGO_PASTEOF 0x400 /* allow allocation of pages past EOF */ |
153 | #define PGO_NOBLOCKALLOC 0x800 /* backing block allocation is not needed */ |
154 | #define PGO_NOTIMESTAMP 0x1000 /* don't mark object accessed/modified */ |
155 | #define PGO_RECLAIM 0x2000 /* object is being reclaimed */ |
156 | #define PGO_GLOCKHELD 0x4000 /* genfs_node's lock is already held */ |
157 | #define PGO_LAZY 0x8000 /* equivalent of MNT_LAZY / FSYNC_LAZY */ |
158 | |
159 | /* page we are not interested in getting */ |
160 | #define PGO_DONTCARE ((struct vm_page *) -1L) /* [get only] */ |
161 | |
162 | #ifdef _KERNEL |
163 | |
164 | /* |
165 | * prototypes |
166 | */ |
167 | |
168 | void (void); |
169 | void (void); |
170 | struct vm_page *(vaddr_t); |
171 | vaddr_t (struct vm_page **, int, int); |
172 | void (vaddr_t, int); |
173 | |
174 | extern size_t ; |
175 | |
176 | /* Flags to uvm_pagermapin() */ |
177 | #define 0x01 /* it's okay to wait */ |
178 | #define 0x02 /* device -> host */ |
179 | #define 0x00 /* host -> device (pseudo flag) */ |
180 | |
181 | #endif /* _KERNEL */ |
182 | |
183 | #endif /* _UVM_UVM_PAGER_H_ */ |
184 | |