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/*
* 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 _MACH_VM_PROT_H_
#define _MACH_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)
/*
* This protection value says whether special notification is to be used.
*/
#define VM_PROT_NOTIFY ((vm_prot_t) 0x10)
#endif /* _MACH_VM_PROT_H_ */
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