FreeBSD/Linux Kernel Cross Reference
sys/mach/vm_prot.h
1 /*
2 * Mach Operating System
3 * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 */
26 /*
27 * HISTORY
28 * $Log: vm_prot.h,v $
29 * Revision 2.6 93/01/14 17:49:10 danner
30 * Standardized include symbol name.
31 * [92/06/10 pds]
32 *
33 * Revision 2.5 92/03/10 16:27:15 jsb
34 * Add no change protection value for memory_object_lock_request.
35 * [David L. Black 92/02/22 17:03:43 dlb@osf.org]
36 *
37 * Revision 2.4 91/05/14 17:03:00 mrt
38 * Correcting copyright
39 *
40 * Revision 2.3 91/02/05 17:37:38 mrt
41 * Changed to new Mach copyright
42 * [91/02/01 17:22:39 mrt]
43 *
44 * Revision 2.2 90/01/22 23:05:57 af
45 * Removed execute permission from default protection.
46 * On the only machine that cares for execute permission (mips)
47 * this is an expensive liability: it requires keeping
48 * Icache consistent memory that never contains code.
49 * [89/12/15 af]
50 *
51 * Revision 2.1 89/08/03 16:06:47 rwd
52 * Created.
53 *
54 * Revision 2.3 89/02/25 18:42:29 gm0w
55 * Changes for cleanup.
56 *
57 * 6-Jun-85 Avadis Tevanian (avie) at Carnegie-Mellon University
58 * Created.
59 *
60 */
61 /*
62 * File: mach/vm_prot.h
63 * Author: Avadis Tevanian, Jr., Michael Wayne Young
64 *
65 * Virtual memory protection definitions.
66 *
67 */
68
69 #ifndef _MACH_VM_PROT_H_
70 #define _MACH_VM_PROT_H_
71
72 /*
73 * Types defined:
74 *
75 * vm_prot_t VM protection values.
76 */
77
78 typedef int vm_prot_t;
79
80 /*
81 * Protection values, defined as bits within the vm_prot_t type
82 */
83
84 #define VM_PROT_NONE ((vm_prot_t) 0x00)
85
86 #define VM_PROT_READ ((vm_prot_t) 0x01) /* read permission */
87 #define VM_PROT_WRITE ((vm_prot_t) 0x02) /* write permission */
88 #define VM_PROT_EXECUTE ((vm_prot_t) 0x04) /* execute permission */
89
90 /*
91 * The default protection for newly-created virtual memory
92 */
93
94 #define VM_PROT_DEFAULT (VM_PROT_READ|VM_PROT_WRITE)
95
96 /*
97 * The maximum privileges possible, for parameter checking.
98 */
99
100 #define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
101
102 /*
103 * An invalid protection value.
104 * Used only by memory_object_lock_request to indicate no change
105 * to page locks. Using -1 here is a bad idea because it
106 * looks like VM_PROT_ALL and then some.
107 */
108 #define VM_PROT_NO_CHANGE ((vm_prot_t) 0x08)
109
110 #endif /* _MACH_VM_PROT_H_ */
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