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/pmap.h

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    1 /*-
    2  * Copyright (c) 1991, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * This code is derived from software contributed to Berkeley by
    6  * The Mach Operating System project at Carnegie-Mellon University.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 4. Neither the name of the University nor the names of its contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  *      from: @(#)pmap.h        8.1 (Berkeley) 6/11/93
   33  *
   34  *
   35  * Copyright (c) 1987, 1990 Carnegie-Mellon University.
   36  * All rights reserved.
   37  *
   38  * Author: Avadis Tevanian, Jr.
   39  *
   40  * Permission to use, copy, modify and distribute this software and
   41  * its documentation is hereby granted, provided that both the copyright
   42  * notice and this permission notice appear in all copies of the
   43  * software, derivative works or modified versions, and any portions
   44  * thereof, and that both notices appear in supporting documentation.
   45  *
   46  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   47  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
   48  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   49  *
   50  * Carnegie Mellon requests users of this software to return to
   51  *
   52  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   53  *  School of Computer Science
   54  *  Carnegie Mellon University
   55  *  Pittsburgh PA 15213-3890
   56  *
   57  * any improvements or extensions that they make and grant Carnegie the
   58  * rights to redistribute these changes.
   59  *
   60  * $FreeBSD: src/sys/vm/pmap.h,v 1.71.2.1 2005/11/13 21:45:48 alc Exp $
   61  */
   62 
   63 /*
   64  *      Machine address mapping definitions -- machine-independent
   65  *      section.  [For machine-dependent section, see "machine/pmap.h".]
   66  */
   67 
   68 #ifndef _PMAP_VM_
   69 #define _PMAP_VM_
   70 /*
   71  * Each machine dependent implementation is expected to
   72  * keep certain statistics.  They may do this anyway they
   73  * so choose, but are expected to return the statistics
   74  * in the following structure.
   75  */
   76 struct pmap_statistics {
   77         long resident_count;    /* # of pages mapped (total) */
   78         long wired_count;       /* # of pages wired */
   79 };
   80 typedef struct pmap_statistics *pmap_statistics_t;
   81 
   82 #include <machine/pmap.h>
   83 
   84 #ifdef _KERNEL
   85 struct proc;
   86 struct thread;
   87 
   88 /*
   89  * Updates to kernel_vm_end are synchronized by the kernel_map's system mutex.
   90  */
   91 extern vm_offset_t kernel_vm_end;
   92 
   93 extern  int      pmap_pagedaemon_waken;
   94 
   95 void             pmap_change_wiring(pmap_t, vm_offset_t, boolean_t);
   96 void             pmap_clear_modify(vm_page_t m);
   97 void             pmap_clear_reference(vm_page_t m);
   98 void             pmap_copy(pmap_t, pmap_t, vm_offset_t, vm_size_t, vm_offset_t);
   99 void             pmap_copy_page(vm_page_t, vm_page_t);
  100 void             pmap_enter(pmap_t, vm_offset_t, vm_page_t, vm_prot_t,
  101                     boolean_t);
  102 vm_page_t        pmap_enter_quick(pmap_t pmap, vm_offset_t va, vm_page_t m,
  103                     vm_prot_t prot, vm_page_t mpte);
  104 vm_paddr_t       pmap_extract(pmap_t pmap, vm_offset_t va);
  105 vm_page_t        pmap_extract_and_hold(pmap_t pmap, vm_offset_t va,
  106                     vm_prot_t prot);
  107 void             pmap_growkernel(vm_offset_t);
  108 void             pmap_init(void);
  109 boolean_t        pmap_is_modified(vm_page_t m);
  110 boolean_t        pmap_is_prefaultable(pmap_t pmap, vm_offset_t va);
  111 boolean_t        pmap_ts_referenced(vm_page_t m);
  112 vm_offset_t      pmap_map(vm_offset_t *, vm_paddr_t, vm_paddr_t, int);
  113 void             pmap_object_init_pt(pmap_t pmap, vm_offset_t addr,
  114                     vm_object_t object, vm_pindex_t pindex, vm_size_t size);
  115 boolean_t        pmap_page_exists_quick(pmap_t pmap, vm_page_t m);
  116 void             pmap_page_init(vm_page_t m);
  117 void             pmap_page_protect(vm_page_t m, vm_prot_t prot);
  118 void             pmap_pinit(pmap_t);
  119 void             pmap_pinit0(pmap_t);
  120 void             pmap_protect(pmap_t, vm_offset_t, vm_offset_t, vm_prot_t);
  121 void             pmap_qenter(vm_offset_t, vm_page_t *, int);
  122 void             pmap_qremove(vm_offset_t, int);
  123 void             pmap_release(pmap_t);
  124 void             pmap_remove(pmap_t, vm_offset_t, vm_offset_t);
  125 void             pmap_remove_all(vm_page_t m);
  126 void             pmap_remove_pages(pmap_t, vm_offset_t, vm_offset_t);
  127 void             pmap_zero_page(vm_page_t);
  128 void             pmap_zero_page_area(vm_page_t, int off, int size);
  129 void             pmap_zero_page_idle(vm_page_t);
  130 int              pmap_mincore(pmap_t pmap, vm_offset_t addr);
  131 void             pmap_activate(struct thread *td);
  132 vm_offset_t      pmap_addr_hint(vm_object_t obj, vm_offset_t addr, vm_size_t size);
  133 void             pmap_init2(void);
  134 
  135 #define pmap_resident_count(pm) ((pm)->pm_stats.resident_count)
  136 #define pmap_wired_count(pm)    ((pm)->pm_stats.wired_count)
  137 
  138 #endif /* _KERNEL */
  139 #endif /* _PMAP_VM_ */

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