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

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_pager.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10  
    1 /*      $NetBSD: uvm_pager.h,v 1.49 2020/05/19 22:22:15 ad Exp $        */
    2 
    3 /*
    4  * Copyright (c) 1997 Charles D. Cranor and Washington University.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  *
   27  * from: Id: uvm_pager.h,v 1.1.2.14 1998/01/13 19:00:50 chuck Exp
   28  */
   29 
   30 /*
   31  * Copyright (c) 1991, 1993
   32  *      The Regents of the University of California.  All rights reserved.
   33  *
   34  * This code is derived from software contributed to Berkeley by
   35  * the Systems Programming Group of the University of Utah Computer
   36  * Science Department.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions and the following disclaimer.
   43  * 2. Redistributions in binary form must reproduce the above copyright
   44  *    notice, this list of conditions and the following disclaimer in the
   45  *    documentation and/or other materials provided with the distribution.
   46  * 3. Neither the name of the University nor the names of its contributors
   47  *    may be used to endorse or promote products derived from this software
   48  *    without specific prior written permission.
   49  *
   50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   60  * SUCH DAMAGE.
   61  *
   62  *      @(#)vm_pager.h  8.5 (Berkeley) 7/7/94
   63  */
   64 
   65 /*
   66  * Copyright (c) 1990 University of Utah.
   67  *
   68  * This code is derived from software contributed to Berkeley by
   69  * the Systems Programming Group of the University of Utah Computer
   70  * Science Department.
   71  *
   72  * Redistribution and use in source and binary forms, with or without
   73  * modification, are permitted provided that the following conditions
   74  * are met:
   75  * 1. Redistributions of source code must retain the above copyright
   76  *    notice, this list of conditions and the following disclaimer.
   77  * 2. Redistributions in binary form must reproduce the above copyright
   78  *    notice, this list of conditions and the following disclaimer in the
   79  *    documentation and/or other materials provided with the distribution.
   80  * 3. Neither the name of the University nor the names of its contributors
   81  *    may be used to endorse or promote products derived from this software
   82  *    without specific prior written permission.
   83  *
   84  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   85  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   86  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   87  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   88  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   89  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   90  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   91  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   92  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   93  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   94  * SUCH DAMAGE.
   95  *
   96  *      @(#)vm_pager.h  8.5 (Berkeley) 7/7/94
   97  */
   98 
   99 #ifndef _UVM_UVM_PAGER_H_
  100 #define _UVM_UVM_PAGER_H_
  101 
  102 /*
  103  * uvm_pager.h
  104  */
  105 
  106 /*
  107  * forward structure declarations
  108  */
  109 
  110 struct uvm_faultinfo;
  111 struct uvm_object;
  112 
  113 /*
  114  * pager ops
  115  */
  116 
  117 struct uvm_pagerops {
  118 
  119         /* init pager */
  120         void    (*pgo_init)(void);
  121 
  122         /* add reference to obj */
  123         void    (*pgo_reference)(struct uvm_object *);
  124 
  125         /* drop reference to obj */
  126         void    (*pgo_detach)(struct uvm_object *);
  127 
  128         /* special non-standard fault processing */
  129         int     (*pgo_fault)(struct uvm_faultinfo *, vaddr_t, struct vm_page **,
  130                              int, int, vm_prot_t, int);
  131 
  132         /* get/read pages */
  133         int     (*pgo_get)(struct uvm_object *, voff_t, struct vm_page **,
  134                            int *, int, vm_prot_t, int, int);
  135 
  136         /* put/write pages */
  137         int     (*pgo_put)(struct uvm_object *, voff_t, voff_t, int);
  138 
  139         /* mark object dirty */
  140         void    (*pgo_markdirty)(struct uvm_object *);
  141 };
  142 
  143 /* pager flags [mostly for flush] */
  144 
  145 #define PGO_CLEANIT     0x001   /* write dirty pages to backing store */
  146 #define PGO_SYNCIO      0x002   /* use sync I/O */
  147 #define PGO_DEACTIVATE  0x004   /* deactivate flushed pages */
  148 #define PGO_FREE        0x008   /* free flushed pages */
  149 /* if PGO_FREE is not set then the pages stay where they are. */
  150 
  151 #define PGO_ALLPAGES    0x010   /* flush whole object [put] */
  152 #define PGO_JOURNALLOCKED 0x020 /* journal is already locked [get/put] */
  153 #define PGO_LOCKED      0x040   /* fault data structures are locked [get] */
  154 #define PGO_BUSYFAIL    0x080   /* fail if a page is busy [put] */
  155 #define PGO_OVERWRITE   0x200   /* pages will be overwritten before unlocked */
  156 #define PGO_PASTEOF     0x400   /* allow allocation of pages past EOF */
  157 #define PGO_NOBLOCKALLOC 0x800  /* backing block allocation is not needed */
  158 #define PGO_NOTIMESTAMP 0x1000  /* don't mark object accessed/modified */
  159 #define PGO_RECLAIM     0x2000  /* object is being reclaimed */
  160 #define PGO_GLOCKHELD   0x4000  /* genfs_node's lock is already held */
  161 #define PGO_LAZY        0x8000  /* equivalent of MNT_LAZY / FSYNC_LAZY */
  162 
  163 /* page we are not interested in getting */
  164 #define PGO_DONTCARE ((struct vm_page *) -1L)   /* [get only] */
  165 
  166 #ifdef _KERNEL
  167 
  168 /*
  169  * prototypes
  170  */
  171 
  172 void    uvm_pager_init(void);
  173 void    uvm_pager_realloc_emerg(void);
  174 struct vm_page *uvm_pageratop(vaddr_t);
  175 vaddr_t uvm_pagermapin(struct vm_page **, int, int);
  176 void    uvm_pagermapout(vaddr_t, int);
  177 
  178 extern size_t pager_map_size;
  179 
  180 /* Flags to uvm_pagermapin() */
  181 #define UVMPAGER_MAPIN_WAITOK   0x01    /* it's okay to wait */
  182 #define UVMPAGER_MAPIN_READ     0x02    /* device -> host */
  183 #define UVMPAGER_MAPIN_WRITE    0x00    /* host -> device (pseudo flag) */
  184 
  185 #endif /* _KERNEL */
  186 
  187 #endif /* _UVM_UVM_PAGER_H_ */

Cache object: 7a2c7f7cdc89b18bb1b534e6538007f9

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.