include/vm/seg_enum.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
  26 /*        All Rights Reserved   */
  27
  28 /*
  29  * Portions of this source code were derived from Berkeley 4.3 BSD
  30  * under license from the Regents of the University of California.
  31  */
  32
  33 #ifndef _VM_SEG_ENUM_H
  34 #define _VM_SEG_ENUM_H
  35
  36 #ifdef  __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 /*
  41  * These enumerations are needed in both <vm/seg.h> and
  42  * <sys/vnode.h> in order to declare function prototypes.
  43  */
  44
  45 /*
  46  * Fault information passed to the seg fault handling routine.
  47  * The F_SOFTLOCK and F_SOFTUNLOCK are used by software
  48  * to lock and unlock pages for physical I/O.
  49  */
  50 enum fault_type {
  51         F_INVAL,                /* invalid page */
  52         F_PROT,                 /* protection fault */
  53         F_SOFTLOCK,             /* software requested locking */
  54         F_SOFTUNLOCK            /* software requested unlocking */
  55 };
  56
  57 /*
  58  * Lock information passed to the seg pagelock handling routine.
  59  */
  60 enum lock_type {
  61         L_PAGELOCK,             /* lock pages */
  62         L_PAGEUNLOCK            /* unlock pages */
  63 };
  64
  65 /*
  66  * seg_rw gives the access type for a fault operation
  67  */
  68 enum seg_rw {
  69         S_OTHER,                /* unknown or not touched */
  70         S_READ,                 /* read access attempted */
  71         S_WRITE,                /* write access attempted */
  72         S_EXEC,                 /* execution access attempted */
  73         S_CREATE,               /* create if page doesn't exist */
  74         S_READ_NOCOW            /* read access, don't do a copy on write */
  75 };
  76
  77 /*
  78  * Capabilities for capability segment op.
  79  */
  80 typedef enum {
  81         S_CAPABILITY_NOMINFLT   /* supports non-faulting page renaming */
  82 } segcapability_t;
  83
  84 #ifdef  __cplusplus
  85 }
  86 #endif
  87
  88 #endif  /* _VM_SEG_ENUM_H */