The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/vm/vm.h

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    1 /*
    2  * Copyright (c) 1991, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)vm.h        8.2 (Berkeley) 12/13/93
   34  *      @(#)vm_prot.h   8.1 (Berkeley) 6/11/93
   35  *      @(#)vm_inherit.h        8.1 (Berkeley) 6/11/93
   36  *
   37  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
   38  * All rights reserved.
   39  *
   40  * Authors: Avadis Tevanian, Jr., Michael Wayne Young
   41  *
   42  * Permission to use, copy, modify and distribute this software and
   43  * its documentation is hereby granted, provided that both the copyright
   44  * notice and this permission notice appear in all copies of the
   45  * software, derivative works or modified versions, and any portions
   46  * thereof, and that both notices appear in supporting documentation.
   47  *
   48  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   49  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
   50  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   51  *
   52  * Carnegie Mellon requests users of this software to return to
   53  *
   54  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   55  *  School of Computer Science
   56  *  Carnegie Mellon University
   57  *  Pittsburgh PA 15213-3890
   58  *
   59  * any improvements or extensions that they make and grant Carnegie the
   60  * rights to redistribute these changes.
   61  *
   62  * $FreeBSD: releng/5.0/sys/vm/vm.h 92029 2002-03-10 21:52:48Z eivind $
   63  */
   64 
   65 #ifndef VM_H
   66 #define VM_H
   67 
   68 typedef char vm_inherit_t;      /* inheritance codes */
   69 
   70 #define VM_INHERIT_SHARE        ((vm_inherit_t) 0)
   71 #define VM_INHERIT_COPY         ((vm_inherit_t) 1)
   72 #define VM_INHERIT_NONE         ((vm_inherit_t) 2)
   73 #define VM_INHERIT_DEFAULT      VM_INHERIT_COPY
   74 
   75 typedef u_char vm_prot_t;       /* protection codes */
   76 
   77 #define VM_PROT_NONE            ((vm_prot_t) 0x00)
   78 #define VM_PROT_READ            ((vm_prot_t) 0x01)
   79 #define VM_PROT_WRITE           ((vm_prot_t) 0x02)
   80 #define VM_PROT_EXECUTE         ((vm_prot_t) 0x04)
   81 #define VM_PROT_OVERRIDE_WRITE  ((vm_prot_t) 0x08)      /* copy-on-write */
   82 
   83 #define VM_PROT_ALL             (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
   84 #define VM_PROT_DEFAULT         VM_PROT_ALL
   85 
   86 union vm_map_object;
   87 typedef union vm_map_object vm_map_object_t;
   88 
   89 struct vm_map_entry;
   90 typedef struct vm_map_entry *vm_map_entry_t;
   91 
   92 struct vm_map;
   93 typedef struct vm_map *vm_map_t;
   94 
   95 struct vm_object;
   96 typedef struct vm_object *vm_object_t;
   97 
   98 #ifndef _KERNEL
   99 /*
  100  * This is defined in <sys/types.h> for the kernel so that non-vm kernel
  101  * sources (mainly Mach-derived ones such as ddb) don't have to include
  102  * vm stuff.  Defining it there for applications might break things.
  103  * Define it here for "applications" that include vm headers (e.g.,
  104  * genassym).
  105  */
  106 typedef int boolean_t;
  107 
  108 /*
  109  * This is defined in <sys/types.h> for the kernel so that vnode_if.h
  110  * doesn't have to include <vm/vm.h>.
  111  */
  112 struct vm_page;
  113 typedef struct vm_page *vm_page_t;
  114 #endif                          /* _KERNEL */
  115 
  116 /*
  117  * Information passed from the machine-independant VM initialization code
  118  * for use by machine-dependant code (mainly for MMU support)
  119  */
  120 struct kva_md_info {
  121         vm_offset_t     buffer_sva;
  122         vm_offset_t     buffer_eva;
  123         vm_offset_t     clean_sva;
  124         vm_offset_t     clean_eva;
  125         vm_offset_t     pager_sva;
  126         vm_offset_t     pager_eva;
  127 };
  128 
  129 extern struct kva_md_info       kmi;
  130 extern void vm_ksubmap_init(struct kva_md_info *);
  131 
  132 #endif                          /* VM_H */
  133 

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