/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ */ /* * HISTORY * * Revision 1.1.1.1 1998/09/22 21:05:31 wsanchez * Import of Mac OS X kernel (~semeria) * * Revision 1.1.1.1 1998/03/07 02:25:46 wsanchez * Import of OSF Mach kernel (~mburg) * * Revision 1.3.8.1 1994/09/23 02:44:31 ezf * change marker to not FREE * [1994/09/22 21:43:46 ezf] * * Revision 1.3.2.2 1993/06/09 02:44:23 gm * Added to OSF/1 R1.3 from NMK15.0. * [1993/06/02 21:18:51 jeffc] * * Revision 1.3 1993/04/19 16:40:48 devrcs * make endif tags ansi compliant/include files * [1993/02/20 21:45:25 david] * * Revision 1.2 1992/12/07 21:29:28 robert * integrate any changes below for 14.0 (branch from 13.16 base) * * Joseph Barrera (jsb) at Carnegie-Mellon University 05-Aug-92 * Added VM_PROT_WANTS_COPY to solve copy-call race condition. * [1992/12/06 20:25:47 robert] * * Revision 1.1 1992/09/30 02:32:28 robert * Initial revision * * $EndLog$ */ /* CMU_HIST */ /* * Revision 2.4.3.1 92/03/03 16:22:41 jeffreyh * [David L. Black 92/02/22 17:03:43 dlb@osf.org] * Add no change protection value for memory_object_lock_request. * * Revision 2.4 91/05/14 17:03:00 mrt * Correcting copyright * * Revision 2.3 91/02/05 17:37:38 mrt * Changed to new Mach copyright * [91/02/01 17:22:39 mrt] * * Revision 2.2 90/01/22 23:05:57 af * Removed execute permission from default protection. * On the only machine that cares for execute permission (mips) * this is an expensive liability: it requires keeping * Icache consistent memory that never contains code. * [89/12/15 af] * * Revision 2.1 89/08/03 16:06:47 rwd * Created. * * Revision 2.3 89/02/25 18:42:29 gm0w * Changes for cleanup. * * 6-Jun-85 Avadis Tevanian (avie) at Carnegie-Mellon University * Created. * */ /* CMU_ENDHIST */ /* * Mach Operating System * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University * All Rights Reserved. * * 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 Mellon * the rights to redistribute these changes. */ /* */ /* * File: mach/vm_prot.h * Author: Avadis Tevanian, Jr., Michael Wayne Young * * Virtual memory protection definitions. * */ #ifndef VM_PROT_H_ #define VM_PROT_H_ /* * Types defined: * * vm_prot_t VM protection values. */ typedef int vm_prot_t; /* * Protection values, defined as bits within the vm_prot_t type */ #define VM_PROT_NONE ((vm_prot_t) 0x00) #define VM_PROT_READ ((vm_prot_t) 0x01) /* read permission */ #define VM_PROT_WRITE ((vm_prot_t) 0x02) /* write permission */ #define VM_PROT_EXECUTE ((vm_prot_t) 0x04) /* execute permission */ /* * The default protection for newly-created virtual memory */ #define VM_PROT_DEFAULT (VM_PROT_READ|VM_PROT_WRITE) /* * The maximum privileges possible, for parameter checking. */ #define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE) /* * An invalid protection value. * Used only by memory_object_lock_request to indicate no change * to page locks. Using -1 here is a bad idea because it * looks like VM_PROT_ALL and then some. */ #define VM_PROT_NO_CHANGE ((vm_prot_t) 0x08) /* * When a caller finds that he cannot obtain write permission on a * mapped entry, the following flag can be used. The entry will * be made "needs copy" effectively copying the object (using COW), * and write permission will be added to the maximum protections * for the associated entry. */ #define VM_PROT_COPY ((vm_prot_t) 0x10) /* * Another invalid protection value. * Used only by memory_object_data_request upon an object * which has specified a copy_call copy strategy. It is used * when the kernel wants a page belonging to a copy of the * object, and is only asking the object as a result of * following a shadow chain. This solves the race between pages * being pushed up by the memory manager and the kernel * walking down the shadow chain. */ #define VM_PROT_WANTS_COPY ((vm_prot_t) 0x10) #endif /* VM_PROT_H_ */