X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/2d21ac55c334faf3a56e5634905ed6987fc787d4..bca245acd4c03fd752d1a45f011ad495e60fe53d:/osfmk/mach/vm_behavior.h

diff --git a/osfmk/mach/vm_behavior.h b/osfmk/mach/vm_behavior.h
index 0d12ceef6..727980d51 100644
--- a/osfmk/mach/vm_behavior.h
+++ b/osfmk/mach/vm_behavior.h
@@ -2,7 +2,7 @@
  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
  *
  * @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
@@ -11,10 +11,10 @@
  * 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,
@@ -22,7 +22,7 @@
  * 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@
  */
 /*
@@ -35,7 +35,7 @@
  *
  */
 
-#ifndef	_MACH_VM_BEHAVIOR_H_
+#ifndef _MACH_VM_BEHAVIOR_H_
 #define _MACH_VM_BEHAVIOR_H_
 
 /*
@@ -44,21 +44,36 @@
  *	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 */
-#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 */
+/*
+ * 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_*/