| | 1 | /* |
| | 2 | * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. The rights granted to you under the License |
| | 10 | * may not be used to create, or enable the creation or redistribution of, |
| | 11 | * unlawful or unlicensed copies of an Apple operating system, or to |
| | 12 | * circumvent, violate, or enable the circumvention or violation of, any |
| | 13 | * terms of an Apple operating system software license agreement. |
| | 14 | * |
| | 15 | * Please obtain a copy of the License at |
| | 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| | 17 | * |
| | 18 | * The Original Code and all software distributed under the License are |
| | 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 23 | * Please see the License for the specific language governing rights and |
| | 24 | * limitations under the License. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 27 | */ |
| | 28 | /* |
| | 29 | * @OSF_COPYRIGHT@ |
| | 30 | */ |
| | 31 | /* |
| | 32 | * File: mach/vm_behavior.h |
| | 33 | * |
| | 34 | * Virtual memory map behavior definitions. |
| | 35 | * |
| | 36 | */ |
| | 37 | |
| | 38 | #ifndef _MACH_VM_BEHAVIOR_H_ |
| | 39 | #define _MACH_VM_BEHAVIOR_H_ |
| | 40 | |
| | 41 | /* |
| | 42 | * Types defined: |
| | 43 | * |
| | 44 | * vm_behavior_t behavior codes. |
| | 45 | */ |
| | 46 | |
| | 47 | typedef int vm_behavior_t; |
| | 48 | |
| | 49 | /* |
| | 50 | * Enumeration of valid values for vm_behavior_t. |
| | 51 | * These describe expected page reference behavior for |
| | 52 | * for a given range of virtual memory. For implementation |
| | 53 | * details see vm/vm_fault.c |
| | 54 | */ |
| | 55 | |
| | 56 | |
| | 57 | /* |
| | 58 | * The following behaviors affect the memory region's future behavior |
| | 59 | * and are stored in the VM map entry data structure. |
| | 60 | */ |
| | 61 | #define VM_BEHAVIOR_DEFAULT ((vm_behavior_t) 0) /* default */ |
| | 62 | #define VM_BEHAVIOR_RANDOM ((vm_behavior_t) 1) /* random */ |
| | 63 | #define VM_BEHAVIOR_SEQUENTIAL ((vm_behavior_t) 2) /* forward sequential */ |
| | 64 | #define VM_BEHAVIOR_RSEQNTL ((vm_behavior_t) 3) /* reverse sequential */ |
| | 65 | |
| | 66 | /* |
| | 67 | * The following "behaviors" affect the memory region only at the time of the |
| | 68 | * call and are not stored in the VM map entry. |
| | 69 | */ |
| | 70 | #define VM_BEHAVIOR_WILLNEED ((vm_behavior_t) 4) /* will need in near future */ |
| | 71 | #define VM_BEHAVIOR_DONTNEED ((vm_behavior_t) 5) /* dont need in near future */ |
| | 72 | #define VM_BEHAVIOR_FREE ((vm_behavior_t) 6) /* free memory without write-back */ |
| | 73 | #define VM_BEHAVIOR_ZERO_WIRED_PAGES ((vm_behavior_t) 7) /* zero out the wired pages of an entry if it is being deleted without unwiring them first */ |
| | 74 | #define VM_BEHAVIOR_REUSABLE ((vm_behavior_t) 8) |
| | 75 | #define VM_BEHAVIOR_REUSE ((vm_behavior_t) 9) |
| | 76 | #define VM_BEHAVIOR_CAN_REUSE ((vm_behavior_t) 10) |
| | 77 | |
| | 78 | #endif /*_MACH_VM_BEHAVIOR_H_*/ |
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