Annotation of src/sys/uvm/uvm_pager.h, Revision 1.23.2.2
1.23.2.2! jdolecek 1: /* $NetBSD: uvm_pager.h,v 1.23.2.1 2002/01/10 20:05:45 thorpej Exp $ */
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) 1990 University of Utah.
39: * Copyright (c) 1991, 1993
40: * The Regents of the University of California. All rights reserved.
41: *
42: * This code is derived from software contributed to Berkeley by
43: * the Systems Programming Group of the University of Utah Computer
44: * Science Department.
45: *
46: * Redistribution and use in source and binary forms, with or without
47: * modification, are permitted provided that the following conditions
48: * are met:
49: * 1. Redistributions of source code must retain the above copyright
50: * notice, this list of conditions and the following disclaimer.
51: * 2. Redistributions in binary form must reproduce the above copyright
52: * notice, this list of conditions and the following disclaimer in the
53: * documentation and/or other materials provided with the distribution.
54: * 3. All advertising materials mentioning features or use of this software
55: * must display the following acknowledgement:
56: * This product includes software developed by the University of
57: * California, Berkeley and its contributors.
58: * 4. Neither the name of the University nor the names of its contributors
59: * may be used to endorse or promote products derived from this software
60: * without specific prior written permission.
61: *
62: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
63: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
64: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
65: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
66: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
67: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
68: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
69: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
70: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
71: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
72: * SUCH DAMAGE.
73: *
74: * @(#)vm_pager.h 8.5 (Berkeley) 7/7/94
75: */
76:
1.4 perry 77: #ifndef _UVM_UVM_PAGER_H_
78: #define _UVM_UVM_PAGER_H_
79:
1.1 mrg 80: /*
81: * uvm_pager.h
82: */
83:
84: /*
1.23.2.1 thorpej 85: * forward structure declarations
86: */
87:
88: struct uvm_faultinfo;
89:
90: /*
1.1 mrg 91: * pager ops
92: */
93:
94: struct uvm_pagerops {
1.23.2.1 thorpej 95:
96: /* init pager */
97: void (*pgo_init) __P((void));
98:
99: /* add reference to obj */
100: void (*pgo_reference)(struct uvm_object *);
101:
102: /* drop reference to obj */
103: void (*pgo_detach)(struct uvm_object *);
104:
105: /* special non-standard fault processing */
106: int (*pgo_fault)(struct uvm_faultinfo *, vaddr_t, struct vm_page **,
107: int, int, vm_fault_t, vm_prot_t, int);
108:
109: /* get/read pages */
110: int (*pgo_get)(struct uvm_object *, voff_t, struct vm_page **,
111: int *, int, vm_prot_t, int, int);
112:
113: /* put/write pages */
114: int (*pgo_put)(struct uvm_object *, voff_t, voff_t, int);
1.1 mrg 115: };
116:
117: /* pager flags [mostly for flush] */
118:
119: #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */
1.20 chs 120: #define PGO_SYNCIO 0x002 /* if PGO_CLEANIT: use sync I/O? */
1.1 mrg 121: #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */
122: #define PGO_FREE 0x008 /* free flushed pages */
1.20 chs 123: /* if PGO_FREE is not set then the pages stay where they are. */
1.1 mrg 124:
125: #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */
126: #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */
1.20 chs 127: #define PGO_OVERWRITE 0x200 /* pages will be overwritten before unlocked */
1.23.2.2! jdolecek 128: #define PGO_PASTEOF 0x400 /* allow allocation of pages past EOF */
1.1 mrg 129:
130: /* page we are not interested in getting */
1.20 chs 131: #define PGO_DONTCARE ((struct vm_page *) -1L) /* [get only] */
1.1 mrg 132:
1.10 thorpej 133: #ifdef _KERNEL
134:
1.1 mrg 135: /*
136: * handle inline options
137: */
138:
139: #ifdef UVM_PAGER_INLINE
140: #define PAGER_INLINE static __inline
1.22 chs 141: #else
1.1 mrg 142: #define PAGER_INLINE /* nothing */
143: #endif /* UVM_PAGER_INLINE */
144:
145: /*
146: * prototypes
147: */
148:
1.23.2.1 thorpej 149: void uvm_pager_init __P((void));
1.7 eeh 150: PAGER_INLINE struct vm_page *uvm_pageratop __P((vaddr_t));
1.23.2.1 thorpej 151: vaddr_t uvm_pagermapin __P((struct vm_page **, int, int));
152: void uvm_pagermapout __P((vaddr_t, int));
1.15 thorpej 153:
154: /* Flags to uvm_pagermapin() */
155: #define UVMPAGER_MAPIN_WAITOK 0x01 /* it's okay to wait */
1.23.2.1 thorpej 156: #define UVMPAGER_MAPIN_READ 0x02 /* device -> host */
157: #define UVMPAGER_MAPIN_WRITE 0x00 /* host -> device (pseudo flag) */
1.18 chs 158:
159: /*
160: * XXX
161: * this is needed until the device strategy interface
162: * is changed to do physically-addressed i/o.
163: */
164:
1.19 chs 165: #ifndef PAGER_MAP_SIZE
1.18 chs 166: #define PAGER_MAP_SIZE (16 * 1024 * 1024)
1.19 chs 167: #endif
1.1 mrg 168:
1.10 thorpej 169: #endif /* _KERNEL */
1.4 perry 170:
171: #endif /* _UVM_UVM_PAGER_H_ */
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