Annotation of src/sys/uvm/uvm_pager.h, Revision 1.44.14.1
1.44.14.1! pgoyette 1: /* $NetBSD$ */
1.1 mrg 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.
1.3 mrg 26: *
27: * from: Id: uvm_pager.h,v 1.1.2.14 1998/01/13 19:00:50 chuck Exp
1.1 mrg 28: */
29:
1.16 mrg 30: /*
31: * Copyright (c) 1991, 1993
32: * The Regents of the University of California. All rights reserved.
1.27 agc 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.
1.16 mrg 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.
1.41 chuck 80: * 3. Neither the name of the University nor the names of its contributors
1.16 mrg 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:
1.4 perry 99: #ifndef _UVM_UVM_PAGER_H_
100: #define _UVM_UVM_PAGER_H_
101:
1.1 mrg 102: /*
103: * uvm_pager.h
104: */
105:
106: /*
1.24 chs 107: * forward structure declarations
108: */
109:
110: struct uvm_faultinfo;
1.44 christos 111: struct uvm_object;
1.24 chs 112:
113: /*
1.1 mrg 114: * pager ops
115: */
116:
117: struct uvm_pagerops {
1.24 chs 118:
119: /* init pager */
1.28 junyoung 120: void (*pgo_init)(void);
1.24 chs 121:
122: /* add reference to obj */
123: void (*pgo_reference)(struct uvm_object *);
124:
125: /* drop reference to obj */
126: void (*pgo_detach)(struct uvm_object *);
127:
128: /* special non-standard fault processing */
129: int (*pgo_fault)(struct uvm_faultinfo *, vaddr_t, struct vm_page **,
1.34 drochner 130: int, int, vm_prot_t, int);
1.24 chs 131:
132: /* get/read pages */
133: int (*pgo_get)(struct uvm_object *, voff_t, struct vm_page **,
134: int *, int, vm_prot_t, int, int);
135:
136: /* put/write pages */
137: int (*pgo_put)(struct uvm_object *, voff_t, voff_t, int);
1.1 mrg 138: };
139:
140: /* pager flags [mostly for flush] */
141:
142: #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */
1.36 pooka 143: #define PGO_SYNCIO 0x002 /* use sync I/O */
1.1 mrg 144: #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */
145: #define PGO_FREE 0x008 /* free flushed pages */
1.20 chs 146: /* if PGO_FREE is not set then the pages stay where they are. */
1.1 mrg 147:
148: #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */
1.44.14.1! pgoyette 149: #define PGO_JOURNALLOCKED 0x020 /* journal is already locked [get/put] */
1.1 mrg 150: #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */
1.26 perseant 151: #define PGO_BUSYFAIL 0x080 /* fail if a page is busy [put] */
1.20 chs 152: #define PGO_OVERWRITE 0x200 /* pages will be overwritten before unlocked */
1.25 chs 153: #define PGO_PASTEOF 0x400 /* allow allocation of pages past EOF */
1.29 yamt 154: #define PGO_NOBLOCKALLOC 0x800 /* backing block allocation is not needed */
1.30 yamt 155: #define PGO_NOTIMESTAMP 0x1000 /* don't mark object accessed/modified */
1.35 chs 156: #define PGO_RECLAIM 0x2000 /* object is being reclaimed */
1.39 chs 157: #define PGO_GLOCKHELD 0x4000 /* genfs_node's lock is already held */
1.43 chs 158: #define PGO_LAZY 0x8000 /* equivalent of MNT_LAZY / FSYNC_LAZY */
1.1 mrg 159:
160: /* page we are not interested in getting */
1.20 chs 161: #define PGO_DONTCARE ((struct vm_page *) -1L) /* [get only] */
1.1 mrg 162:
1.10 thorpej 163: #ifdef _KERNEL
164:
1.1 mrg 165: /*
166: * prototypes
167: */
168:
1.28 junyoung 169: void uvm_pager_init(void);
1.42 matt 170: void uvm_pager_realloc_emerg(void);
1.33 yamt 171: struct vm_page *uvm_pageratop(vaddr_t);
1.28 junyoung 172: vaddr_t uvm_pagermapin(struct vm_page **, int, int);
173: void uvm_pagermapout(vaddr_t, int);
1.15 thorpej 174:
1.37 yamt 175: extern size_t pager_map_size;
176:
1.15 thorpej 177: /* Flags to uvm_pagermapin() */
178: #define UVMPAGER_MAPIN_WAITOK 0x01 /* it's okay to wait */
1.24 chs 179: #define UVMPAGER_MAPIN_READ 0x02 /* device -> host */
180: #define UVMPAGER_MAPIN_WRITE 0x00 /* host -> device (pseudo flag) */
1.18 chs 181:
1.10 thorpej 182: #endif /* _KERNEL */
1.4 perry 183:
184: #endif /* _UVM_UVM_PAGER_H_ */
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