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

     /*
      * Copyright (c) 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)vm.h        8.2 (Berkeley) 12/13/93
     *      @(#)vm_prot.h   8.1 (Berkeley) 6/11/93
     *      @(#)vm_inherit.h        8.1 (Berkeley) 6/11/93
     *
     * Copyright (c) 1987, 1990 Carnegie-Mellon University.
     * All rights reserved.
     *
     * Authors: Avadis Tevanian, Jr., Michael Wayne Young
     *
     * Permission to use, copy, modify and distribute this software and
     * its documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     *
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     *
     * Carnegie Mellon requests users of this software to return to
     *
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     *
     * any improvements or extensions that they make and grant Carnegie the
     * rights to redistribute these changes.
     *
     * $FreeBSD: src/sys/vm/vm.h,v 1.16.2.1 2002/12/28 19:49:41 dillon Exp $
     */
    
    #ifndef _VM_VM_H_
    #define _VM_VM_H_
    
    #ifndef _SYS_TYPES_H_
    #include <sys/types.h>
    #endif
    #include <machine/specialreg.h>
    
    typedef char vm_inherit_t;      /* inheritance codes */
    
    #define VM_INHERIT_SHARE        ((vm_inherit_t) 0)
    #define VM_INHERIT_COPY         ((vm_inherit_t) 1)
    #define VM_INHERIT_NONE         ((vm_inherit_t) 2)
    #define VM_INHERIT_DEFAULT      VM_INHERIT_COPY
    
    typedef u_char vm_prot_t;       /* protection codes */
    
    #define VM_PROT_NONE            ((vm_prot_t) 0x00)
    #define VM_PROT_READ            ((vm_prot_t) 0x01)
    #define VM_PROT_WRITE           ((vm_prot_t) 0x02)
    #define VM_PROT_EXECUTE         ((vm_prot_t) 0x04)
    #define VM_PROT_OVERRIDE_WRITE  ((vm_prot_t) 0x08)      /* copy-on-write */
    #define VM_PROT_NOSYNC          ((vm_prot_t) 0x10)
    
    #define VM_PROT_RW              (VM_PROT_READ|VM_PROT_WRITE)
    #define VM_PROT_ALL             (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)
    #define VM_PROT_DEFAULT         VM_PROT_ALL
    
    typedef u_char vm_maptype_t;    /* type of vm_map_entry */
    
    #define VM_MAPTYPE_UNSPECIFIED  0
    #define VM_MAPTYPE_NORMAL       1
    #define VM_MAPTYPE_VPAGETABLE   2
    #define VM_MAPTYPE_SUBMAP       3
    
   union vm_map_object;
   typedef union vm_map_object vm_map_object_t;
   
   struct vm_map_entry;
   typedef struct vm_map_entry *vm_map_entry_t;
   
   struct vm_map;
   typedef struct vm_map *vm_map_t;
   
   struct vm_object;
   typedef struct vm_object *vm_object_t;
   
   /*
    * This is also defined in vm/vm_page.h.
    */
   #ifndef __VM_PAGE_T_DEFINED__
   #define __VM_PAGE_T_DEFINED__
   struct vm_page;
   typedef struct vm_page *vm_page_t;
   #endif
   
   
   /* Memory attributes. */
   
   typedef char vm_memattr_t;
   
   #define VM_MEMATTR_UNCACHEABLE          ((vm_memattr_t)PAT_UNCACHEABLE)
   #define VM_MEMATTR_WRITE_COMBINING      ((vm_memattr_t)PAT_WRITE_COMBINING)
   #define VM_MEMATTR_WRITE_THROUGH        ((vm_memattr_t)PAT_WRITE_THROUGH)
   #define VM_MEMATTR_WRITE_PROTECTED      ((vm_memattr_t)PAT_WRITE_PROTECTED)
   #define VM_MEMATTR_WRITE_BACK           ((vm_memattr_t)PAT_WRITE_BACK)
   #define VM_MEMATTR_WEAK_UNCACHEABLE     ((vm_memattr_t)PAT_UNCACHED)
   
   #define VM_MEMATTR_DEFAULT      VM_MEMATTR_WRITE_BACK
   
   #endif                          /* _VM_VM_H_ */

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