root / lab4 / .minix-src / include / uvm / uvm_prot.h @ 14
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| 1 | 13 | up20180614 | /* $NetBSD: uvm_prot.h,v 1.4 2005/12/11 12:25:29 christos Exp $ */
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| 2 | |||
| 3 | /*
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| 4 | * Copyright (c) 1991, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * The Mach Operating System project at Carnegie-Mellon University.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | *
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| 34 | * @(#)vm_prot.h 8.1 (Berkeley) 6/11/93
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| 35 | *
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| 36 | *
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| 37 | * Copyright (c) 1987, 1990 Carnegie-Mellon University.
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| 38 | * All rights reserved.
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| 39 | *
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| 40 | * Authors: Avadis Tevanian, Jr., Michael Wayne Young
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| 41 | *
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| 42 | * Permission to use, copy, modify and distribute this software and
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| 43 | * its documentation is hereby granted, provided that both the copyright
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| 44 | * notice and this permission notice appear in all copies of the
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| 45 | * software, derivative works or modified versions, and any portions
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| 46 | * thereof, and that both notices appear in supporting documentation.
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| 47 | *
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| 48 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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| 49 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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| 50 | * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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| 51 | *
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| 52 | * Carnegie Mellon requests users of this software to return to
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| 53 | *
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| 54 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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| 55 | * School of Computer Science
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| 56 | * Carnegie Mellon University
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| 57 | * Pittsburgh PA 15213-3890
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| 58 | *
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| 59 | * any improvements or extensions that they make and grant Carnegie the
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| 60 | * rights to redistribute these changes.
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| 61 | */
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| 62 | |||
| 63 | /*
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| 64 | * Virtual memory protection definitions.
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| 65 | */
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| 66 | |||
| 67 | #ifndef _UVM_PROT_
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| 68 | #define _UVM_PROT_
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| 69 | |||
| 70 | /*
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| 71 | * Types defined:
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| 72 | *
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| 73 | * vm_prot_t VM protection values.
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| 74 | */
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| 75 | |||
| 76 | typedef int vm_prot_t; |
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| 77 | |||
| 78 | /*
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| 79 | * Protection values, defined as bits within the vm_prot_t type
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| 80 | */
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| 81 | |||
| 82 | #define VM_PROT_NONE ((vm_prot_t) 0x00) |
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| 83 | |||
| 84 | #define VM_PROT_READ ((vm_prot_t) 0x01) /* read permission */ |
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| 85 | #define VM_PROT_WRITE ((vm_prot_t) 0x02) /* write permission */ |
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| 86 | #define VM_PROT_EXECUTE ((vm_prot_t) 0x04) /* execute permission */ |
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| 87 | |||
| 88 | /*
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| 89 | * The default protection for newly-created virtual memory
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| 90 | */
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| 91 | |||
| 92 | #define VM_PROT_DEFAULT (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
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| 93 | |||
| 94 | /*
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| 95 | * The maximum privileges possible, for parameter checking.
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| 96 | */
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| 97 | |||
| 98 | #define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
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| 99 | |||
| 100 | #endif /* _UVM_PROT_ */ |