xnu-6153.121.1.tar.gz

[apple/xnu.git] / osfmk / mach / vm_behavior.h

diff --git a/osfmk/mach/vm_behavior.h b/osfmk/mach/vm_behavior.h
index 1fe81758ca5f412d376fd631302b971b7625c730..727980d51e3063b48f8e5c0e36b3a7f4bd0de247 100644 (file)
--- a/osfmk/mach/vm_behavior.h
+++ b/osfmk/mach/vm_behavior.h
@@ -1,61 +1,33 @@
 /*
 /*

- * 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,
  * 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@
  */
  */
 /*
  * @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
  *
 /*
  *     File:   mach/vm_behavior.h
  *


@@ -63,7 +35,7 @@
  *
  */
 
  *
  */
 

-#ifndef        _MACH_VM_BEHAVIOR_H_
+#ifndef _MACH_VM_BEHAVIOR_H_

 #define _MACH_VM_BEHAVIOR_H_
 
 /*
 #define _MACH_VM_BEHAVIOR_H_
 
 /*


@@ -72,19 +44,36 @@
  *     vm_behavior_t   behavior codes.
  */
 
  *     vm_behavior_t   behavior codes.
  */
 

-typedef int            vm_behavior_t;
+typedef int             vm_behavior_t;

 
 /*
  *     Enumeration of valid values for 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
  */
 
 
  *     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_*/