usr/src/sys/vm/vm_prot.h

/*
 * Copyright (c) 1991 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * The Mach Operating System project at Carnegie-Mellon University.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)vm_prot.h   7.3 (Berkeley) %G%
 *
 *
 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Authors: Avadis Tevanian, Jr., Michael Wayne Young
 *
 * 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 the
 * rights to redistribute these changes.
 */

/*
 *      Virtual memory protection definitions.
 */

#ifndef _VM_PROT_
#define _VM_PROT_

/*
 *      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|VM_PROT_EXECUTE)

/*
 *      The maximum privileges possible, for parameter checking.
 */

#define VM_PROT_ALL     (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)

#endif /* _VM_PROT_ */