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
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
|
/* $OpenBSD: vm_map.h,v 1.9 1999/02/26 01:48:51 art Exp $ */
/* $NetBSD: vm_map.h,v 1.11 1995/03/26 20:39:10 jtc Exp $ */
/*
* 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 Mach Operating System project at Carnegie-Mellon University.
*
* 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_map.h 8.9 (Berkeley) 5/17/95
*
*
* Copyright (c) 1987, 1990 Carnegie-Mellon University.
* All rights reserved.
*
* Authors: Avadis Tevanian, Jr., Michael Wayne Young
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* Virtual memory map module definitions.
*/
#ifndef _VM_MAP_
#define _VM_MAP_
#ifdef UVM
#include <uvm/uvm_anon.h>
#endif
/*
* Types defined:
*
* vm_map_t the high-level address map data structure.
* vm_map_entry_t an entry in an address map.
* vm_map_version_t a timestamp of a map, for use with vm_map_lookup
*/
/*
* Objects which live in maps may be either VM objects, or
* another map (called a "sharing map") which denotes read-write
* sharing with other maps.
*
* XXXCDC: private pager data goes here now
*/
union vm_map_object {
#ifdef UVM
struct uvm_object *uvm_obj; /* UVM OBJECT */
struct vm_map *sub_map; /* belongs to another map */
#else
struct vm_object *vm_object; /* object object */
struct vm_map *sub_map; /* belongs to another map */
struct vm_map *share_map; /* share map */
#endif /* UVM */
};
/*
* Address map entries consist of start and end addresses,
* a VM object (or sharing map) and offset into that object,
* and user-exported inheritance and protection information.
* Also included is control information for virtual copy operations.
*/
struct vm_map_entry {
struct vm_map_entry *prev; /* previous entry */
struct vm_map_entry *next; /* next entry */
vm_offset_t start; /* start address */
vm_offset_t end; /* end address */
union vm_map_object object; /* object I point to */
vm_offset_t offset; /* offset into object */
#if defined(UVM)
/* etype is a bitmap that replaces the following 4 items */
int etype; /* entry type */
#else
boolean_t is_a_map; /* Is "object" a map? */
boolean_t is_sub_map; /* Is "object" a submap? */
/* Only in sharing maps: */
boolean_t copy_on_write; /* is data copy-on-write */
boolean_t needs_copy; /* does object need to be copied */
#endif
/* Only in task maps: */
vm_prot_t protection; /* protection code */
vm_prot_t max_protection; /* maximum protection */
vm_inherit_t inheritance; /* inheritance */
int wired_count; /* can be paged if = 0 */
#ifdef UVM
struct vm_aref aref; /* anonymous overlay */
int advice; /* madvise advice */
#define uvm_map_entry_stop_copy flags
u_int8_t flags; /* flags */
#define UVM_MAP_STATIC 0x01 /* static map entry */
#endif /* UVM */
};
/*
* Maps are doubly-linked lists of map entries, kept sorted
* by address. A single hint is provided to start
* searches again from the last successful search,
* insertion, or removal.
*/
struct vm_map {
struct pmap * pmap; /* Physical map */
lock_data_t lock; /* Lock for map data */
struct vm_map_entry header; /* List of entries */
int nentries; /* Number of entries */
vm_size_t size; /* virtual size */
#ifndef UVM
boolean_t is_main_map; /* Am I a main map? */
#endif
int ref_count; /* Reference count */
simple_lock_data_t ref_lock; /* Lock for ref_count field */
vm_map_entry_t hint; /* hint for quick lookups */
simple_lock_data_t hint_lock; /* lock for hint storage */
vm_map_entry_t first_free; /* First free space hint */
boolean_t entries_pageable; /* map entries pageable?? */
unsigned int timestamp; /* Version number */
#define min_offset header.start
#define max_offset header.end
};
#ifndef UVM /* version handled elsewhere in uvm */
/*
* Map versions are used to validate a previous lookup attempt.
*
* Since lookup operations may involve both a main map and
* a sharing map, it is necessary to have a timestamp from each.
* [If the main map timestamp has changed, the share_map and
* associated timestamp are no longer valid; the map version
* does not include a reference for the imbedded share_map.]
*/
typedef struct {
int main_timestamp;
vm_map_t share_map;
int share_timestamp;
} vm_map_version_t;
#endif /* UVM */
/*
* Macros: vm_map_lock, etc.
* Function:
* Perform locking on the data portion of a map.
*/
#include <sys/proc.h> /* XXX for curproc and p_pid */
#define vm_map_lock_drain_interlock(map) { \
lockmgr(&(map)->lock, LK_DRAIN|LK_INTERLOCK, \
&(map)->ref_lock, curproc); \
(map)->timestamp++; \
}
#ifdef DIAGNOSTIC
#define vm_map_lock(map) { \
if (lockmgr(&(map)->lock, LK_EXCLUSIVE, (void *)0, curproc) != 0) { \
panic("vm_map_lock: failed to get lock"); \
} \
(map)->timestamp++; \
}
#else
#define vm_map_lock(map) { \
lockmgr(&(map)->lock, LK_EXCLUSIVE, (void *)0, curproc); \
(map)->timestamp++; \
}
#endif /* DIAGNOSTIC */
#define vm_map_unlock(map) \
lockmgr(&(map)->lock, LK_RELEASE, (void *)0, curproc)
#define vm_map_lock_read(map) \
lockmgr(&(map)->lock, LK_SHARED, (void *)0, curproc)
#define vm_map_unlock_read(map) \
lockmgr(&(map)->lock, LK_RELEASE, (void *)0, curproc)
#define vm_map_set_recursive(map) { \
simple_lock(&(map)->lk_interlock); \
(map)->lk_flags |= LK_CANRECURSE; \
simple_unlock(&(map)->lk_interlock); \
}
#define vm_map_clear_recursive(map) { \
simple_lock(&(map)->lk_interlock); \
(map)->lk_flags &= ~LK_CANRECURSE; \
simple_unlock(&(map)->lk_interlock); \
}
#if defined(UVM) && defined(_KERNEL)
/* XXX: clean up later */
static boolean_t vm_map_lock_try __P((vm_map_t));
static __inline boolean_t vm_map_lock_try(map)
vm_map_t map;
{
if (lockmgr(&(map)->lock, LK_EXCLUSIVE|LK_NOWAIT, (void *)0, curproc) != 0)
return(FALSE);
map->timestamp++;
return(TRUE);
}
#endif
/*
* Functions implemented as macros
*/
#define vm_map_min(map) ((map)->min_offset)
#define vm_map_max(map) ((map)->max_offset)
#define vm_map_pmap(map) ((map)->pmap)
/* XXX: number of kernel maps and entries to statically allocate */
#ifndef MAX_KMAP
#define MAX_KMAP 20
#endif
#ifndef MAX_KMAPENT
#define MAX_KMAPENT 1000
#endif
#ifdef _KERNEL
boolean_t vm_map_check_protection __P((vm_map_t,
vm_offset_t, vm_offset_t, vm_prot_t));
int vm_map_copy __P((vm_map_t, vm_map_t, vm_offset_t,
vm_size_t, vm_offset_t, boolean_t, boolean_t));
void vm_map_copy_entry __P((vm_map_t,
vm_map_t, vm_map_entry_t, vm_map_entry_t));
struct pmap;
vm_map_t vm_map_create __P((struct pmap *,
vm_offset_t, vm_offset_t, boolean_t));
void vm_map_deallocate __P((vm_map_t));
int vm_map_delete __P((vm_map_t, vm_offset_t, vm_offset_t));
vm_map_entry_t vm_map_entry_create __P((vm_map_t));
void vm_map_entry_delete __P((vm_map_t, vm_map_entry_t));
void vm_map_entry_dispose __P((vm_map_t, vm_map_entry_t));
void vm_map_entry_unwire __P((vm_map_t, vm_map_entry_t));
int vm_map_find __P((vm_map_t, vm_object_t,
vm_offset_t, vm_offset_t *, vm_size_t, boolean_t));
int vm_map_findspace __P((vm_map_t,
vm_offset_t, vm_size_t, vm_offset_t *));
int vm_map_inherit __P((vm_map_t,
vm_offset_t, vm_offset_t, vm_inherit_t));
void vm_map_init __P((struct vm_map *,
vm_offset_t, vm_offset_t, boolean_t));
int vm_map_insert __P((vm_map_t,
vm_object_t, vm_offset_t, vm_offset_t, vm_offset_t));
int vm_map_lookup __P((vm_map_t *, vm_offset_t, vm_prot_t,
vm_map_entry_t *, vm_object_t *, vm_offset_t *, vm_prot_t *,
boolean_t *, boolean_t *));
void vm_map_lookup_done __P((vm_map_t, vm_map_entry_t));
boolean_t vm_map_lookup_entry __P((vm_map_t,
vm_offset_t, vm_map_entry_t *));
int vm_map_pageable __P((vm_map_t,
vm_offset_t, vm_offset_t, boolean_t));
int vm_map_clean __P((vm_map_t,
vm_offset_t, vm_offset_t, boolean_t, boolean_t));
void vm_map_print __P((vm_map_t, boolean_t));
void _vm_map_print __P((vm_map_t, boolean_t,
int (*)(const char *, ...)));
int vm_map_protect __P((vm_map_t,
vm_offset_t, vm_offset_t, vm_prot_t, boolean_t));
void vm_map_reference __P((vm_map_t));
int vm_map_remove __P((vm_map_t, vm_offset_t, vm_offset_t));
void vm_map_simplify __P((vm_map_t, vm_offset_t));
void vm_map_simplify_entry __P((vm_map_t, vm_map_entry_t));
void vm_map_startup __P((void));
int vm_map_submap __P((vm_map_t,
vm_offset_t, vm_offset_t, vm_map_t));
#endif
#endif /* _VM_MAP_ */
|
