1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/* $OpenBSD: uvm_pager.h,v 1.13 2001/11/07 02:55:50 art Exp $ */
/* $NetBSD: uvm_pager.h,v 1.18 2000/11/24 22:41:39 chs Exp $ */
/*
*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles D. Cranor and
* Washington University.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* from: Id: uvm_pager.h,v 1.1.2.14 1998/01/13 19:00:50 chuck Exp
*/
/*
* Copyright (c) 1990 University of Utah.
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)vm_pager.h 8.5 (Berkeley) 7/7/94
*/
#ifndef _UVM_UVM_PAGER_H_
#define _UVM_UVM_PAGER_H_
/*
* uvm_pager.h
*/
/*
* async pager i/o descriptor structure
*/
TAILQ_HEAD(uvm_aiohead, uvm_aiodesc);
struct uvm_aiodesc {
void (*aiodone) __P((struct uvm_aiodesc *));
/* aio done function */
vaddr_t kva; /* KVA of mapped page(s) */
int npages; /* # of pages in I/O req */
void *pd_ptr; /* pager-dependent pointer */
TAILQ_ENTRY(uvm_aiodesc) aioq; /* linked list of aio's */
};
/*
* pager ops
*/
struct uvm_pagerops {
void (*pgo_init) __P((void));/* init pager */
void (*pgo_reference) /* add reference to obj */
__P((struct uvm_object *));
void (*pgo_detach) /* drop reference to obj */
__P((struct uvm_object *));
int (*pgo_fault) /* special nonstd fault fn */
__P((struct uvm_faultinfo *, vaddr_t,
vm_page_t *, int, int, vm_fault_t,
vm_prot_t, int));
boolean_t (*pgo_flush) /* flush pages out of obj */
__P((struct uvm_object *, voff_t, voff_t, int));
int (*pgo_get) /* get/read page */
__P((struct uvm_object *, voff_t,
vm_page_t *, int *, int, vm_prot_t, int, int));
int (*pgo_put) /* put/write page */
__P((struct uvm_object *, vm_page_t *,
int, boolean_t));
void (*pgo_cluster) /* return range of cluster */
__P((struct uvm_object *, voff_t, voff_t *,
voff_t *));
struct vm_page ** (*pgo_mk_pcluster) /* make "put" cluster */
__P((struct uvm_object *, struct vm_page **,
int *, struct vm_page *, int, voff_t,
voff_t));
boolean_t (*pgo_releasepg) /* release page */
__P((struct vm_page *, struct vm_page **));
};
/* pager flags [mostly for flush] */
#define PGO_CLEANIT 0x001 /* write dirty pages to backing store */
#define PGO_SYNCIO 0x002 /* if PGO_CLEAN: use sync I/O? */
/*
* obviously if neither PGO_INVALIDATE or PGO_FREE are set then the pages
* stay where they are.
*/
#define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */
#define PGO_FREE 0x008 /* free flushed pages */
#define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */
#define PGO_DOACTCLUST 0x020 /* flag to mk_pcluster to include active */
#define PGO_LOCKED 0x040 /* fault data structures are locked [get] */
#define PGO_PDFREECLUST 0x080 /* daemon's free cluster flag [uvm_pager_put] */
#define PGO_REALLOCSWAP 0x100 /* reallocate swap area [pager_dropcluster] */
/* page we are not interested in getting */
#define PGO_DONTCARE ((struct vm_page *) -1) /* [get only] */
#ifdef _KERNEL
/*
* handle inline options
*/
#ifdef UVM_PAGER_INLINE
#define PAGER_INLINE static __inline
#else
#define PAGER_INLINE /* nothing */
#endif /* UVM_PAGER_INLINE */
/*
* prototypes
*/
void uvm_pager_dropcluster __P((struct uvm_object *,
struct vm_page *, struct vm_page **,
int *, int));
void uvm_pager_init __P((void));
int uvm_pager_put __P((struct uvm_object *, struct vm_page *,
struct vm_page ***, int *, int,
voff_t, voff_t));
PAGER_INLINE struct vm_page *uvm_pageratop __P((vaddr_t));
vaddr_t uvm_pagermapin __P((struct vm_page **, int,
struct uvm_aiodesc **, int));
void uvm_pagermapout __P((vaddr_t, int));
struct vm_page **uvm_mk_pcluster __P((struct uvm_object *, struct vm_page **,
int *, struct vm_page *, int,
voff_t, voff_t));
/* Flags to uvm_pagermapin() */
#define UVMPAGER_MAPIN_WAITOK 0x01 /* it's okay to wait */
#define UVMPAGER_MAPIN_READ 0x02 /* host <- device */
#define UVMPAGER_MAPIN_WRITE 0x00 /* device -> host (pseudo flag) */
/*
* get/put return values
* OK operation was successful
* BAD specified data was out of the accepted range
* FAIL specified data was in range, but doesn't exist
* PEND operations was initiated but not completed
* ERROR error while accessing data that is in range and exists
* AGAIN temporary resource shortage prevented operation from happening
* UNLOCK unlock the map and try again
* REFAULT [uvm_fault internal use only!] unable to relock data structures,
* thus the mapping needs to be reverified before we can procede
*/
#define VM_PAGER_OK 0
#define VM_PAGER_BAD 1
#define VM_PAGER_FAIL 2
#define VM_PAGER_PEND 3
#define VM_PAGER_ERROR 4
#define VM_PAGER_AGAIN 5
#define VM_PAGER_UNLOCK 6
#define VM_PAGER_REFAULT 7
/*
* XXX
* this is needed until the device strategy interface
* is changed to do physically-addressed i/o.
*/
#define PAGER_MAP_SIZE (16 * 1024 * 1024)
#endif /* _KERNEL */
#endif /* _UVM_UVM_PAGER_H_ */
|
