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Annotation of OSKit-Mach/include/mach/vm_prot.h, revision 1.1.1.1

1.1       root        1: /* 
                      2:  * Mach Operating System
                      3:  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
                      4:  * All Rights Reserved.
                      5:  * 
                      6:  * Permission to use, copy, modify and distribute this software and its
                      7:  * documentation is hereby granted, provided that both the copyright
                      8:  * notice and this permission notice appear in all copies of the
                      9:  * software, derivative works or modified versions, and any portions
                     10:  * thereof, and that both notices appear in supporting documentation.
                     11:  * 
                     12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     15:  * 
                     16:  * Carnegie Mellon requests users of this software to return to
                     17:  * 
                     18:  *  Software Distribution Coordinator  or  [email protected]
                     19:  *  School of Computer Science
                     20:  *  Carnegie Mellon University
                     21:  *  Pittsburgh PA 15213-3890
                     22:  * 
                     23:  * any improvements or extensions that they make and grant Carnegie Mellon
                     24:  * the rights to redistribute these changes.
                     25:  */
                     26: /*
                     27:  *     File:   mach/vm_prot.h
                     28:  *     Author: Avadis Tevanian, Jr., Michael Wayne Young
                     29:  *
                     30:  *     Virtual memory protection definitions.
                     31:  *
                     32:  */
                     33: 
                     34: #ifndef        _MACH_VM_PROT_H_
                     35: #define        _MACH_VM_PROT_H_
                     36: 
                     37: /*
                     38:  *     Types defined:
                     39:  *
                     40:  *     vm_prot_t               VM protection values.
                     41:  */
                     42: 
                     43: typedef int            vm_prot_t;
                     44: 
                     45: /*
                     46:  *     Protection values, defined as bits within the vm_prot_t type
                     47:  */
                     48: 
                     49: #define        VM_PROT_NONE    ((vm_prot_t) 0x00)
                     50: 
                     51: #define VM_PROT_READ   ((vm_prot_t) 0x01)      /* read permission */
                     52: #define VM_PROT_WRITE  ((vm_prot_t) 0x02)      /* write permission */
                     53: #define VM_PROT_EXECUTE        ((vm_prot_t) 0x04)      /* execute permission */
                     54: 
                     55: /*
                     56:  *     The default protection for newly-created virtual memory
                     57:  */
                     58: 
                     59: #define VM_PROT_DEFAULT        (VM_PROT_READ|VM_PROT_WRITE)
                     60: 
                     61: /*
                     62:  *     The maximum privileges possible, for parameter checking.
                     63:  */
                     64: 
                     65: #define VM_PROT_ALL    (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
                     66: 
                     67: /*
                     68:  *     An invalid protection value.
                     69:  *     Used only by memory_object_lock_request to indicate no change
                     70:  *     to page locks.  Using -1 here is a bad idea because it
                     71:  *     looks like VM_PROT_ALL and then some.
                     72:  */
                     73: #define VM_PROT_NO_CHANGE      ((vm_prot_t) 0x08)
                     74: 
                     75: /*
                     76:  *     This protection value says whether special notification is to be used.
                     77:  */
                     78: #define VM_PROT_NOTIFY         ((vm_prot_t) 0x10)
                     79: #endif /* _MACH_VM_PROT_H_ */

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