Annotation of src/sys/uvm/uvm_pager.h, Revision 1.37.16.1
1.37 yamt 1: /* $NetBSD$ */
1.1 mrg 2:
3: /*
4: *
5: * Copyright (c) 1997 Charles D. Cranor and Washington University.
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by Charles D. Cranor and
19: * Washington University.
20: * 4. The name of the author may not be used to endorse or promote products
21: * derived from this software without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.3 mrg 33: *
34: * from: Id: uvm_pager.h,v 1.1.2.14 1998/01/13 19:00:50 chuck Exp
1.1 mrg 35: */
36:
1.16 mrg 37: /*
38: * Copyright (c) 1991, 1993
39: * The Regents of the University of California. All rights reserved.
1.27 agc 40: *
41: * This code is derived from software contributed to Berkeley by
42: * the Systems Programming Group of the University of Utah Computer
43: * Science Department.
44: *
45: * Redistribution and use in source and binary forms, with or without
46: * modification, are permitted provided that the following conditions
47: * are met:
48: * 1. Redistributions of source code must retain the above copyright
49: * notice, this list of conditions and the following disclaimer.
50: * 2. Redistributions in binary form must reproduce the above copyright
51: * notice, this list of conditions and the following disclaimer in the
52: * documentation and/or other materials provided with the distribution.
53: * 3. Neither the name of the University nor the names of its contributors
54: * may be used to endorse or promote products derived from this software
55: * without specific prior written permission.
56: *
57: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
58: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
59: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
60: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
61: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
62: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
63: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67: * SUCH DAMAGE.
68: *
69: * @(#)vm_pager.h 8.5 (Berkeley) 7/7/94
70: */
71:
72: /*
73: * Copyright (c) 1990 University of Utah.
1.16 mrg 74: *
75: * This code is derived from software contributed to Berkeley by
76: * the Systems Programming Group of the University of Utah Computer
77: * Science Department.
78: *
79: * Redistribution and use in source and binary forms, with or without
80: * modification, are permitted provided that the following conditions
81: * are met:
82: * 1. Redistributions of source code must retain the above copyright
83: * notice, this list of conditions and the following disclaimer.
84: * 2. Redistributions in binary form must reproduce the above copyright
85: * notice, this list of conditions and the following disclaimer in the
86: * documentation and/or other materials provided with the distribution.
87: * 3. All advertising materials mentioning features or use of this software
88: * must display the following acknowledgement:
89: * This product includes software developed by the University of
90: * California, Berkeley and its contributors.
91: * 4. Neither the name of the University nor the names of its contributors
92: * may be used to endorse or promote products derived from this software
93: * without specific prior written permission.
94: *
95: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
96: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
97: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
98: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
99: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
100: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
101: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
102: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
103: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
104: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
105: * SUCH DAMAGE.
106: *
107: * @(#)vm_pager.h 8.5 (Berkeley) 7/7/94
108: */
109:
1.4 perry 110: #ifndef _UVM_UVM_PAGER_H_
111: #define _UVM_UVM_PAGER_H_
112:
1.1 mrg 113: /*
114: * uvm_pager.h
115: */
116:
117: /*
1.24 chs 118: * forward structure declarations
119: */
120:
121: struct uvm_faultinfo;
122:
123: /*
1.1 mrg 124: * pager ops
125: */
126:
127: struct uvm_pagerops {
1.24 chs 128:
129: /* init pager */
1.28 junyoung 130: void (*pgo_init)(void);
1.24 chs 131:
132: /* add reference to obj */
133: void (*pgo_reference)(struct uvm_object *);
134:
135: /* drop reference to obj */
136: void (*pgo_detach)(struct uvm_object *);
137:
138: /* special non-standard fault processing */
139: int (*pgo_fault)(struct uvm_faultinfo *, vaddr_t, struct vm_page **,
1.34 drochner 140: int, int, vm_prot_t, int);
1.24 chs 141:
142: /* get/read pages */
143: int (*pgo_get)(struct uvm_object *, voff_t, struct vm_page **,
144: int *, int, vm_prot_t, int, int);
145:
146: /* put/write pages */
147: int (*pgo_put)(struct uvm_object *, voff_t, voff_t, int);
1.1 mrg 148: };
149:
150: /* pager flags [mostly for flush] */
151:
152: #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */
1.36 pooka 153: #define PGO_SYNCIO 0x002 /* use sync I/O */
1.1 mrg 154: #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */
155: #define PGO_FREE 0x008 /* free flushed pages */
1.20 chs 156: /* if PGO_FREE is not set then the pages stay where they are. */
1.1 mrg 157:
158: #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */
1.37.16.1! mjf 159: #define PGO_JOURNALLOCKED 0x020 /* journal is already locked [put] */
1.1 mrg 160: #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */
1.26 perseant 161: #define PGO_BUSYFAIL 0x080 /* fail if a page is busy [put] */
1.20 chs 162: #define PGO_OVERWRITE 0x200 /* pages will be overwritten before unlocked */
1.25 chs 163: #define PGO_PASTEOF 0x400 /* allow allocation of pages past EOF */
1.29 yamt 164: #define PGO_NOBLOCKALLOC 0x800 /* backing block allocation is not needed */
1.30 yamt 165: #define PGO_NOTIMESTAMP 0x1000 /* don't mark object accessed/modified */
1.35 chs 166: #define PGO_RECLAIM 0x2000 /* object is being reclaimed */
1.1 mrg 167:
168: /* page we are not interested in getting */
1.20 chs 169: #define PGO_DONTCARE ((struct vm_page *) -1L) /* [get only] */
1.1 mrg 170:
1.10 thorpej 171: #ifdef _KERNEL
172:
1.1 mrg 173: /*
174: * prototypes
175: */
176:
1.28 junyoung 177: void uvm_pager_init(void);
1.33 yamt 178: struct vm_page *uvm_pageratop(vaddr_t);
1.28 junyoung 179: vaddr_t uvm_pagermapin(struct vm_page **, int, int);
180: void uvm_pagermapout(vaddr_t, int);
1.15 thorpej 181:
1.37 yamt 182: extern size_t pager_map_size;
183:
1.15 thorpej 184: /* Flags to uvm_pagermapin() */
185: #define UVMPAGER_MAPIN_WAITOK 0x01 /* it's okay to wait */
1.24 chs 186: #define UVMPAGER_MAPIN_READ 0x02 /* device -> host */
187: #define UVMPAGER_MAPIN_WRITE 0x00 /* host -> device (pseudo flag) */
1.18 chs 188:
1.10 thorpej 189: #endif /* _KERNEL */
1.4 perry 190:
191: #endif /* _UVM_UVM_PAGER_H_ */
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