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uvm_pager.h revision 1.42.8.1
      1  1.42.8.1       riz /*	$NetBSD: uvm_pager.h,v 1.42.8.1 2012/05/07 03:01:13 riz Exp $	*/
      2       1.1       mrg 
      3       1.1       mrg /*
      4       1.1       mrg  * Copyright (c) 1997 Charles D. Cranor and Washington University.
      5       1.1       mrg  * All rights reserved.
      6       1.1       mrg  *
      7       1.1       mrg  * Redistribution and use in source and binary forms, with or without
      8       1.1       mrg  * modification, are permitted provided that the following conditions
      9       1.1       mrg  * are met:
     10       1.1       mrg  * 1. Redistributions of source code must retain the above copyright
     11       1.1       mrg  *    notice, this list of conditions and the following disclaimer.
     12       1.1       mrg  * 2. Redistributions in binary form must reproduce the above copyright
     13       1.1       mrg  *    notice, this list of conditions and the following disclaimer in the
     14       1.1       mrg  *    documentation and/or other materials provided with the distribution.
     15       1.1       mrg  *
     16       1.1       mrg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17       1.1       mrg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18       1.1       mrg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19       1.1       mrg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20       1.1       mrg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21       1.1       mrg  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22       1.1       mrg  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23       1.1       mrg  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24       1.1       mrg  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25       1.1       mrg  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26       1.3       mrg  *
     27       1.3       mrg  * from: Id: uvm_pager.h,v 1.1.2.14 1998/01/13 19:00:50 chuck Exp
     28       1.1       mrg  */
     29       1.1       mrg 
     30      1.16       mrg /*
     31      1.16       mrg  * Copyright (c) 1991, 1993
     32      1.16       mrg  *	The Regents of the University of California.  All rights reserved.
     33      1.27       agc  *
     34      1.27       agc  * This code is derived from software contributed to Berkeley by
     35      1.27       agc  * the Systems Programming Group of the University of Utah Computer
     36      1.27       agc  * Science Department.
     37      1.27       agc  *
     38      1.27       agc  * Redistribution and use in source and binary forms, with or without
     39      1.27       agc  * modification, are permitted provided that the following conditions
     40      1.27       agc  * are met:
     41      1.27       agc  * 1. Redistributions of source code must retain the above copyright
     42      1.27       agc  *    notice, this list of conditions and the following disclaimer.
     43      1.27       agc  * 2. Redistributions in binary form must reproduce the above copyright
     44      1.27       agc  *    notice, this list of conditions and the following disclaimer in the
     45      1.27       agc  *    documentation and/or other materials provided with the distribution.
     46      1.27       agc  * 3. Neither the name of the University nor the names of its contributors
     47      1.27       agc  *    may be used to endorse or promote products derived from this software
     48      1.27       agc  *    without specific prior written permission.
     49      1.27       agc  *
     50      1.27       agc  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     51      1.27       agc  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     52      1.27       agc  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     53      1.27       agc  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     54      1.27       agc  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     55      1.27       agc  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     56      1.27       agc  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     57      1.27       agc  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     58      1.27       agc  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     59      1.27       agc  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     60      1.27       agc  * SUCH DAMAGE.
     61      1.27       agc  *
     62      1.27       agc  *	@(#)vm_pager.h	8.5 (Berkeley) 7/7/94
     63      1.27       agc  */
     64      1.27       agc 
     65      1.27       agc /*
     66      1.27       agc  * Copyright (c) 1990 University of Utah.
     67      1.16       mrg  *
     68      1.16       mrg  * This code is derived from software contributed to Berkeley by
     69      1.16       mrg  * the Systems Programming Group of the University of Utah Computer
     70      1.16       mrg  * Science Department.
     71      1.16       mrg  *
     72      1.16       mrg  * Redistribution and use in source and binary forms, with or without
     73      1.16       mrg  * modification, are permitted provided that the following conditions
     74      1.16       mrg  * are met:
     75      1.16       mrg  * 1. Redistributions of source code must retain the above copyright
     76      1.16       mrg  *    notice, this list of conditions and the following disclaimer.
     77      1.16       mrg  * 2. Redistributions in binary form must reproduce the above copyright
     78      1.16       mrg  *    notice, this list of conditions and the following disclaimer in the
     79      1.16       mrg  *    documentation and/or other materials provided with the distribution.
     80      1.41     chuck  * 3. Neither the name of the University nor the names of its contributors
     81      1.16       mrg  *    may be used to endorse or promote products derived from this software
     82      1.16       mrg  *    without specific prior written permission.
     83      1.16       mrg  *
     84      1.16       mrg  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     85      1.16       mrg  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     86      1.16       mrg  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     87      1.16       mrg  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     88      1.16       mrg  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     89      1.16       mrg  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     90      1.16       mrg  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     91      1.16       mrg  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     92      1.16       mrg  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     93      1.16       mrg  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     94      1.16       mrg  * SUCH DAMAGE.
     95      1.16       mrg  *
     96      1.16       mrg  *	@(#)vm_pager.h	8.5 (Berkeley) 7/7/94
     97      1.16       mrg  */
     98      1.16       mrg 
     99       1.4     perry #ifndef _UVM_UVM_PAGER_H_
    100       1.4     perry #define _UVM_UVM_PAGER_H_
    101       1.4     perry 
    102       1.1       mrg /*
    103       1.1       mrg  * uvm_pager.h
    104       1.1       mrg  */
    105       1.1       mrg 
    106       1.1       mrg /*
    107      1.24       chs  * forward structure declarations
    108      1.24       chs  */
    109      1.24       chs 
    110      1.24       chs struct uvm_faultinfo;
    111      1.24       chs 
    112      1.24       chs /*
    113       1.1       mrg  * pager ops
    114       1.1       mrg  */
    115       1.1       mrg 
    116       1.1       mrg struct uvm_pagerops {
    117      1.24       chs 
    118      1.24       chs 	/* init pager */
    119      1.28  junyoung 	void	(*pgo_init)(void);
    120      1.24       chs 
    121      1.24       chs 	/* add reference to obj */
    122      1.24       chs 	void	(*pgo_reference)(struct uvm_object *);
    123      1.24       chs 
    124      1.24       chs 	/* drop reference to obj */
    125      1.24       chs 	void	(*pgo_detach)(struct uvm_object *);
    126      1.24       chs 
    127      1.24       chs 	/* special non-standard fault processing */
    128      1.24       chs 	int	(*pgo_fault)(struct uvm_faultinfo *, vaddr_t, struct vm_page **,
    129      1.34  drochner 			     int, int, vm_prot_t, int);
    130      1.24       chs 
    131      1.24       chs 	/* get/read pages */
    132      1.24       chs 	int	(*pgo_get)(struct uvm_object *, voff_t, struct vm_page **,
    133      1.24       chs 			   int *, int, vm_prot_t, int, int);
    134      1.24       chs 
    135      1.24       chs 	/* put/write pages */
    136      1.24       chs 	int	(*pgo_put)(struct uvm_object *, voff_t, voff_t, int);
    137       1.1       mrg };
    138       1.1       mrg 
    139       1.1       mrg /* pager flags [mostly for flush] */
    140       1.1       mrg 
    141       1.1       mrg #define PGO_CLEANIT	0x001	/* write dirty pages to backing store */
    142      1.36     pooka #define PGO_SYNCIO	0x002	/* use sync I/O */
    143       1.1       mrg #define PGO_DEACTIVATE	0x004	/* deactivate flushed pages */
    144       1.1       mrg #define PGO_FREE	0x008	/* free flushed pages */
    145      1.20       chs /* if PGO_FREE is not set then the pages stay where they are. */
    146       1.1       mrg 
    147       1.1       mrg #define PGO_ALLPAGES	0x010	/* flush whole object/get all pages */
    148      1.38   hannken #define PGO_JOURNALLOCKED 0x020	/* journal is already locked [put] */
    149       1.1       mrg #define PGO_LOCKED	0x040	/* fault data structures are locked [get] */
    150      1.26  perseant #define PGO_BUSYFAIL	0x080	/* fail if a page is busy [put] */
    151      1.20       chs #define PGO_OVERWRITE	0x200	/* pages will be overwritten before unlocked */
    152      1.25       chs #define PGO_PASTEOF	0x400	/* allow allocation of pages past EOF */
    153      1.29      yamt #define PGO_NOBLOCKALLOC 0x800	/* backing block allocation is not needed */
    154      1.30      yamt #define PGO_NOTIMESTAMP 0x1000	/* don't mark object accessed/modified */
    155      1.35       chs #define PGO_RECLAIM	0x2000	/* object is being reclaimed */
    156      1.39       chs #define PGO_GLOCKHELD	0x4000	/* genfs_node's lock is already held */
    157  1.42.8.1       riz #define PGO_LAZY	0x8000	/* equivalent of MNT_LAZY / FSYNC_LAZY */
    158       1.1       mrg 
    159       1.1       mrg /* page we are not interested in getting */
    160      1.20       chs #define PGO_DONTCARE ((struct vm_page *) -1L)	/* [get only] */
    161       1.1       mrg 
    162      1.10   thorpej #ifdef _KERNEL
    163      1.10   thorpej 
    164       1.1       mrg /*
    165       1.1       mrg  * prototypes
    166       1.1       mrg  */
    167       1.1       mrg 
    168      1.28  junyoung void	uvm_pager_init(void);
    169      1.42      matt void	uvm_pager_realloc_emerg(void);
    170      1.33      yamt struct vm_page *uvm_pageratop(vaddr_t);
    171      1.28  junyoung vaddr_t	uvm_pagermapin(struct vm_page **, int, int);
    172      1.28  junyoung void	uvm_pagermapout(vaddr_t, int);
    173      1.15   thorpej 
    174      1.37      yamt extern size_t pager_map_size;
    175      1.37      yamt 
    176      1.15   thorpej /* Flags to uvm_pagermapin() */
    177      1.15   thorpej #define	UVMPAGER_MAPIN_WAITOK	0x01	/* it's okay to wait */
    178      1.24       chs #define	UVMPAGER_MAPIN_READ	0x02	/* device -> host */
    179      1.24       chs #define	UVMPAGER_MAPIN_WRITE	0x00	/* host -> device (pseudo flag) */
    180      1.18       chs 
    181      1.10   thorpej #endif /* _KERNEL */
    182       1.4     perry 
    183       1.4     perry #endif /* _UVM_UVM_PAGER_H_ */
    184