| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 21 | */ |
| | 22 | /* |
| | 23 | * @OSF_COPYRIGHT@ |
| | 24 | */ |
| | 25 | /* |
| | 26 | * HISTORY |
| | 27 | * |
| | 28 | * Revision 1.1.1.1 1998/09/22 21:05:31 wsanchez |
| | 29 | * Import of Mac OS X kernel (~semeria) |
| | 30 | * |
| | 31 | * Revision 1.1.1.1 1998/03/07 02:25:46 wsanchez |
| | 32 | * Import of OSF Mach kernel (~mburg) |
| | 33 | * |
| | 34 | * Revision 1.3.8.1 1994/09/23 02:44:31 ezf |
| | 35 | * change marker to not FREE |
| | 36 | * [1994/09/22 21:43:46 ezf] |
| | 37 | * |
| | 38 | * Revision 1.3.2.2 1993/06/09 02:44:23 gm |
| | 39 | * Added to OSF/1 R1.3 from NMK15.0. |
| | 40 | * [1993/06/02 21:18:51 jeffc] |
| | 41 | * |
| | 42 | * Revision 1.3 1993/04/19 16:40:48 devrcs |
| | 43 | * make endif tags ansi compliant/include files |
| | 44 | * [1993/02/20 21:45:25 david] |
| | 45 | * |
| | 46 | * Revision 1.2 1992/12/07 21:29:28 robert |
| | 47 | * integrate any changes below for 14.0 (branch from 13.16 base) |
| | 48 | * |
| | 49 | * Joseph Barrera (jsb) at Carnegie-Mellon University 05-Aug-92 |
| | 50 | * Added VM_PROT_WANTS_COPY to solve copy-call race condition. |
| | 51 | * [1992/12/06 20:25:47 robert] |
| | 52 | * |
| | 53 | * Revision 1.1 1992/09/30 02:32:28 robert |
| | 54 | * Initial revision |
| | 55 | * |
| | 56 | * $EndLog$ |
| | 57 | */ |
| | 58 | /* CMU_HIST */ |
| | 59 | /* |
| | 60 | * Revision 2.4.3.1 92/03/03 16:22:41 jeffreyh |
| | 61 | * [David L. Black 92/02/22 17:03:43 dlb@osf.org] |
| | 62 | * Add no change protection value for memory_object_lock_request. |
| | 63 | * |
| | 64 | * Revision 2.4 91/05/14 17:03:00 mrt |
| | 65 | * Correcting copyright |
| | 66 | * |
| | 67 | * Revision 2.3 91/02/05 17:37:38 mrt |
| | 68 | * Changed to new Mach copyright |
| | 69 | * [91/02/01 17:22:39 mrt] |
| | 70 | * |
| | 71 | * Revision 2.2 90/01/22 23:05:57 af |
| | 72 | * Removed execute permission from default protection. |
| | 73 | * On the only machine that cares for execute permission (mips) |
| | 74 | * this is an expensive liability: it requires keeping |
| | 75 | * Icache consistent memory that never contains code. |
| | 76 | * [89/12/15 af] |
| | 77 | * |
| | 78 | * Revision 2.1 89/08/03 16:06:47 rwd |
| | 79 | * Created. |
| | 80 | * |
| | 81 | * Revision 2.3 89/02/25 18:42:29 gm0w |
| | 82 | * Changes for cleanup. |
| | 83 | * |
| | 84 | * 6-Jun-85 Avadis Tevanian (avie) at Carnegie-Mellon University |
| | 85 | * Created. |
| | 86 | * |
| | 87 | */ |
| | 88 | /* CMU_ENDHIST */ |
| | 89 | /* |
| | 90 | * Mach Operating System |
| | 91 | * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University |
| | 92 | * All Rights Reserved. |
| | 93 | * |
| | 94 | * Permission to use, copy, modify and distribute this software and its |
| | 95 | * documentation is hereby granted, provided that both the copyright |
| | 96 | * notice and this permission notice appear in all copies of the |
| | 97 | * software, derivative works or modified versions, and any portions |
| | 98 | * thereof, and that both notices appear in supporting documentation. |
| | 99 | * |
| | 100 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
| | 101 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
| | 102 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
| | 103 | * |
| | 104 | * Carnegie Mellon requests users of this software to return to |
| | 105 | * |
| | 106 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
| | 107 | * School of Computer Science |
| | 108 | * Carnegie Mellon University |
| | 109 | * Pittsburgh PA 15213-3890 |
| | 110 | * |
| | 111 | * any improvements or extensions that they make and grant Carnegie Mellon |
| | 112 | * the rights to redistribute these changes. |
| | 113 | */ |
| | 114 | /* |
| | 115 | */ |
| | 116 | /* |
| | 117 | * File: mach/vm_prot.h |
| | 118 | * Author: Avadis Tevanian, Jr., Michael Wayne Young |
| | 119 | * |
| | 120 | * Virtual memory protection definitions. |
| | 121 | * |
| | 122 | */ |
| | 123 | |
| | 124 | #ifndef VM_PROT_H_ |
| | 125 | #define VM_PROT_H_ |
| | 126 | |
| | 127 | /* |
| | 128 | * Types defined: |
| | 129 | * |
| | 130 | * vm_prot_t VM protection values. |
| | 131 | */ |
| | 132 | |
| | 133 | typedef int vm_prot_t; |
| | 134 | |
| | 135 | /* |
| | 136 | * Protection values, defined as bits within the vm_prot_t type |
| | 137 | */ |
| | 138 | |
| | 139 | #define VM_PROT_NONE ((vm_prot_t) 0x00) |
| | 140 | |
| | 141 | #define VM_PROT_READ ((vm_prot_t) 0x01) /* read permission */ |
| | 142 | #define VM_PROT_WRITE ((vm_prot_t) 0x02) /* write permission */ |
| | 143 | #define VM_PROT_EXECUTE ((vm_prot_t) 0x04) /* execute permission */ |
| | 144 | |
| | 145 | /* |
| | 146 | * The default protection for newly-created virtual memory |
| | 147 | */ |
| | 148 | |
| | 149 | #define VM_PROT_DEFAULT (VM_PROT_READ|VM_PROT_WRITE) |
| | 150 | |
| | 151 | /* |
| | 152 | * The maximum privileges possible, for parameter checking. |
| | 153 | */ |
| | 154 | |
| | 155 | #define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE) |
| | 156 | |
| | 157 | /* |
| | 158 | * An invalid protection value. |
| | 159 | * Used only by memory_object_lock_request to indicate no change |
| | 160 | * to page locks. Using -1 here is a bad idea because it |
| | 161 | * looks like VM_PROT_ALL and then some. |
| | 162 | */ |
| | 163 | #define VM_PROT_NO_CHANGE ((vm_prot_t) 0x08) |
| | 164 | |
| | 165 | /* |
| | 166 | * When a caller finds that he cannot obtain write permission on a |
| | 167 | * mapped entry, the following flag can be used. The entry will |
| | 168 | * be made "needs copy" effectively copying the object (using COW), |
| | 169 | * and write permission will be added to the maximum protections |
| | 170 | * for the associated entry. |
| | 171 | */ |
| | 172 | #define VM_PROT_COPY ((vm_prot_t) 0x10) |
| | 173 | |
| | 174 | |
| | 175 | /* |
| | 176 | * Another invalid protection value. |
| | 177 | * Used only by memory_object_data_request upon an object |
| | 178 | * which has specified a copy_call copy strategy. It is used |
| | 179 | * when the kernel wants a page belonging to a copy of the |
| | 180 | * object, and is only asking the object as a result of |
| | 181 | * following a shadow chain. This solves the race between pages |
| | 182 | * being pushed up by the memory manager and the kernel |
| | 183 | * walking down the shadow chain. |
| | 184 | */ |
| | 185 | #define VM_PROT_WANTS_COPY ((vm_prot_t) 0x10) |
| | 186 | |
| | 187 | #endif /* VM_PROT_H_ */ |
projects / apple / xnu.git / blame_incremental