FreeBSD/Linux Kernel Cross Reference
sys/vm/vm.h
1 /*-
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)vm.h 8.2 (Berkeley) 12/13/93
30 * @(#)vm_prot.h 8.1 (Berkeley) 6/11/93
31 * @(#)vm_inherit.h 8.1 (Berkeley) 6/11/93
32 *
33 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
34 * All rights reserved.
35 *
36 * Authors: Avadis Tevanian, Jr., Michael Wayne Young
37 *
38 * Permission to use, copy, modify and distribute this software and
39 * its documentation is hereby granted, provided that both the copyright
40 * notice and this permission notice appear in all copies of the
41 * software, derivative works or modified versions, and any portions
42 * thereof, and that both notices appear in supporting documentation.
43 *
44 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
45 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
46 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
47 *
48 * Carnegie Mellon requests users of this software to return to
49 *
50 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
51 * School of Computer Science
52 * Carnegie Mellon University
53 * Pittsburgh PA 15213-3890
54 *
55 * any improvements or extensions that they make and grant Carnegie the
56 * rights to redistribute these changes.
57 *
58 * $FreeBSD: releng/6.0/sys/vm/vm.h 144501 2005-04-01 20:00:11Z jhb $
59 */
60
61 #ifndef VM_H
62 #define VM_H
63
64 typedef char vm_inherit_t; /* inheritance codes */
65
66 #define VM_INHERIT_SHARE ((vm_inherit_t) 0)
67 #define VM_INHERIT_COPY ((vm_inherit_t) 1)
68 #define VM_INHERIT_NONE ((vm_inherit_t) 2)
69 #define VM_INHERIT_DEFAULT VM_INHERIT_COPY
70
71 typedef u_char vm_prot_t; /* protection codes */
72
73 #define VM_PROT_NONE ((vm_prot_t) 0x00)
74 #define VM_PROT_READ ((vm_prot_t) 0x01)
75 #define VM_PROT_WRITE ((vm_prot_t) 0x02)
76 #define VM_PROT_EXECUTE ((vm_prot_t) 0x04)
77 #define VM_PROT_OVERRIDE_WRITE ((vm_prot_t) 0x08) /* copy-on-write */
78
79 #define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
80 #define VM_PROT_RW (VM_PROT_READ|VM_PROT_WRITE)
81 #define VM_PROT_DEFAULT VM_PROT_ALL
82
83 enum obj_type { OBJT_DEFAULT, OBJT_SWAP, OBJT_VNODE, OBJT_DEVICE, OBJT_PHYS,
84 OBJT_DEAD };
85 typedef u_char objtype_t;
86
87 union vm_map_object;
88 typedef union vm_map_object vm_map_object_t;
89
90 struct vm_map_entry;
91 typedef struct vm_map_entry *vm_map_entry_t;
92
93 struct vm_map;
94 typedef struct vm_map *vm_map_t;
95
96 struct vm_object;
97 typedef struct vm_object *vm_object_t;
98
99 #ifndef _KERNEL
100 /*
101 * This is defined in <sys/types.h> for the kernel so that non-vm kernel
102 * sources (mainly Mach-derived ones such as ddb) don't have to include
103 * vm stuff. Defining it there for applications might break things.
104 * Define it here for "applications" that include vm headers (e.g.,
105 * genassym).
106 */
107 typedef int boolean_t;
108
109 /*
110 * This is defined in <sys/types.h> for the kernel so that vnode_if.h
111 * doesn't have to include <vm/vm.h>.
112 */
113 struct vm_page;
114 typedef struct vm_page *vm_page_t;
115 #endif /* _KERNEL */
116
117 /*
118 * Virtual memory MPSAFE temporary workarounds.
119 */
120 extern int debug_mpsafevm; /* defined in vm/vm_meter.c */
121 #define VM_LOCK_GIANT() do { \
122 if (!debug_mpsafevm) \
123 mtx_lock(&Giant); \
124 } while (0)
125 #define VM_UNLOCK_GIANT() do { \
126 if (!debug_mpsafevm) \
127 mtx_unlock(&Giant); \
128 } while (0)
129
130 /*
131 * Information passed from the machine-independant VM initialization code
132 * for use by machine-dependant code (mainly for MMU support)
133 */
134 struct kva_md_info {
135 vm_offset_t buffer_sva;
136 vm_offset_t buffer_eva;
137 vm_offset_t clean_sva;
138 vm_offset_t clean_eva;
139 vm_offset_t pager_sva;
140 vm_offset_t pager_eva;
141 };
142
143 extern struct kva_md_info kmi;
144 extern void vm_ksubmap_init(struct kva_md_info *);
145
146 #endif /* VM_H */
147
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