/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
-/*
- * HISTORY
- *
- * Revision 1.1.1.1 1998/09/22 21:05:31 wsanchez
- * Import of Mac OS X kernel (~semeria)
- *
- * Revision 1.1.1.1 1998/03/07 02:25:46 wsanchez
- * Import of OSF Mach kernel (~mburg)
- *
- * Revision 1.1.10.2 1994/09/23 02:44:05 ezf
- * change marker to not FREE
- * [1994/09/22 21:43:34 ezf]
- *
- * Revision 1.1.10.1 1994/08/07 20:50:20 bolinger
- * Import colo_shared revision into NMK18.
- * [1994/08/02 16:41:42 bolinger]
- *
- * Revision 1.1.8.1 1994/07/08 20:09:11 dwm
- * mk6 CR227 - bring vm_behavior constants up to spec.
- * [1994/07/08 20:02:37 dwm]
- *
- * Revision 1.1.4.3 1993/09/17 21:35:31 robert
- * change marker to OSF_FREE_COPYRIGHT
- * [1993/09/17 21:28:53 robert]
- *
- * Revision 1.1.4.2 1993/06/04 15:14:02 jeffc
- * CR9193 - MK5.0 merge.
- * [1993/06/04 13:54:38 jeffc]
- *
- * Revision 3.0 92/12/31 22:14:09 ede
- * Initial revision for OSF/1 R1.3
- *
- * $EndLog$
- */
/*
* File: mach/vm_behavior.h
*
*
*/
-#ifndef _MACH_VM_BEHAVIOR_H_
+#ifndef _MACH_VM_BEHAVIOR_H_
#define _MACH_VM_BEHAVIOR_H_
/*
* vm_behavior_t behavior codes.
*/
-typedef int vm_behavior_t;
+typedef int vm_behavior_t;
/*
* Enumeration of valid values for vm_behavior_t.
- * These describe expected page reference behavior for
- * for a given range of virtual memory. For implementation
+ * These describe expected page reference behavior for
+ * for a given range of virtual memory. For implementation
* details see vm/vm_fault.c
*/
-#define VM_BEHAVIOR_DEFAULT ((vm_behavior_t) 0) /* default */
-#define VM_BEHAVIOR_RANDOM ((vm_behavior_t) 1) /* random */
-#define VM_BEHAVIOR_SEQUENTIAL ((vm_behavior_t) 2) /* forward sequential */
-#define VM_BEHAVIOR_RSEQNTL ((vm_behavior_t) 3) /* reverse sequential */
+/*
+ * The following behaviors affect the memory region's future behavior
+ * and are stored in the VM map entry data structure.
+ */
+#define VM_BEHAVIOR_DEFAULT ((vm_behavior_t) 0) /* default */
+#define VM_BEHAVIOR_RANDOM ((vm_behavior_t) 1) /* random */
+#define VM_BEHAVIOR_SEQUENTIAL ((vm_behavior_t) 2) /* forward sequential */
+#define VM_BEHAVIOR_RSEQNTL ((vm_behavior_t) 3) /* reverse sequential */
+
+/*
+ * The following "behaviors" affect the memory region only at the time of the
+ * call and are not stored in the VM map entry.
+ */
+#define VM_BEHAVIOR_WILLNEED ((vm_behavior_t) 4) /* will need in near future */
+#define VM_BEHAVIOR_DONTNEED ((vm_behavior_t) 5) /* dont need in near future */
+#define VM_BEHAVIOR_FREE ((vm_behavior_t) 6) /* free memory without write-back */
+#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 */
+#define VM_BEHAVIOR_REUSABLE ((vm_behavior_t) 8)
+#define VM_BEHAVIOR_REUSE ((vm_behavior_t) 9)
+#define VM_BEHAVIOR_CAN_REUSE ((vm_behavior_t) 10)
+#define VM_BEHAVIOR_PAGEOUT ((vm_behavior_t) 11)
-#endif /*_MACH_VM_BEHAVIOR_H_*/
+#endif /*_MACH_VM_BEHAVIOR_H_*/
projects / apple / xnu.git / blobdiff