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      1 /*	$NetBSD: uvm_prot.h,v 1.4 2005/12/11 12:25:29 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * The Mach Operating System project at Carnegie-Mellon University.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	@(#)vm_prot.h	8.1 (Berkeley) 6/11/93
     35  *
     36  *
     37  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
     38  * All rights reserved.
     39  *
     40  * Authors: Avadis Tevanian, Jr., Michael Wayne Young
     41  *
     42  * Permission to use, copy, modify and distribute this software and
     43  * its documentation is hereby granted, provided that both the copyright
     44  * notice and this permission notice appear in all copies of the
     45  * software, derivative works or modified versions, and any portions
     46  * thereof, and that both notices appear in supporting documentation.
     47  *
     48  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     49  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     50  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     51  *
     52  * Carnegie Mellon requests users of this software to return to
     53  *
     54  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     55  *  School of Computer Science
     56  *  Carnegie Mellon University
     57  *  Pittsburgh PA 15213-3890
     58  *
     59  * any improvements or extensions that they make and grant Carnegie the
     60  * rights to redistribute these changes.
     61  */
     62 
     63 /*
     64  *	Virtual memory protection definitions.
     65  */
     66 
     67 #ifndef	_UVM_PROT_
     68 #define	_UVM_PROT_
     69 
     70 /*
     71  *	Types defined:
     72  *
     73  *	vm_prot_t		VM protection values.
     74  */
     75 
     76 typedef int		vm_prot_t;
     77 
     78 /*
     79  *	Protection values, defined as bits within the vm_prot_t type
     80  */
     81 
     82 #define	VM_PROT_NONE	((vm_prot_t) 0x00)
     83 
     84 #define VM_PROT_READ	((vm_prot_t) 0x01)	/* read permission */
     85 #define VM_PROT_WRITE	((vm_prot_t) 0x02)	/* write permission */
     86 #define VM_PROT_EXECUTE	((vm_prot_t) 0x04)	/* execute permission */
     87 
     88 /*
     89  *	The default protection for newly-created virtual memory
     90  */
     91 
     92 #define VM_PROT_DEFAULT	(VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
     93 
     94 /*
     95  *	The maximum privileges possible, for parameter checking.
     96  */
     97 
     98 #define VM_PROT_ALL	(VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
     99 
    100 #endif /* _UVM_PROT_ */
    101