uvm_pager.h revision 1.20.2.2
1 /* $NetBSD: uvm_pager.h,v 1.20.2.2 2001/06/21 20:10:42 nathanw Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 1997 Charles D. Cranor and Washington University. 6 * All rights reserved. 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles D. Cranor and 19 * Washington University. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * from: Id: uvm_pager.h,v 1.1.2.14 1998/01/13 19:00:50 chuck Exp 35 */ 36 37 /* 38 * Copyright (c) 1990 University of Utah. 39 * Copyright (c) 1991, 1993 40 * The Regents of the University of California. All rights reserved. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * @(#)vm_pager.h 8.5 (Berkeley) 7/7/94 75 */ 76 77 #ifndef _UVM_UVM_PAGER_H_ 78 #define _UVM_UVM_PAGER_H_ 79 80 /* 81 * uvm_pager.h 82 */ 83 84 /* 85 * pager ops 86 */ 87 88 struct uvm_pagerops { 89 void (*pgo_init) __P((void));/* init pager */ 90 void (*pgo_reference) /* add reference to obj */ 91 __P((struct uvm_object *)); 92 void (*pgo_detach) /* drop reference to obj */ 93 __P((struct uvm_object *)); 94 int (*pgo_fault) /* special nonstd fault fn */ 95 __P((struct uvm_faultinfo *, vaddr_t, 96 struct vm_page **, int, int, vm_fault_t, 97 vm_prot_t, int)); 98 boolean_t (*pgo_flush) /* flush pages out of obj */ 99 __P((struct uvm_object *, voff_t, voff_t, int)); 100 int (*pgo_get) /* get/read page */ 101 __P((struct uvm_object *, voff_t, 102 struct vm_page **, int *, int, vm_prot_t, int, 103 int)); 104 int (*pgo_put) /* put/write page */ 105 __P((struct uvm_object *, struct vm_page **, 106 int, boolean_t)); 107 void (*pgo_cluster) /* return range of cluster */ 108 __P((struct uvm_object *, voff_t, voff_t *, 109 voff_t *)); 110 struct vm_page ** (*pgo_mk_pcluster) /* make "put" cluster */ 111 __P((struct uvm_object *, struct vm_page **, 112 int *, struct vm_page *, int, voff_t, 113 voff_t)); 114 boolean_t (*pgo_releasepg) /* release page */ 115 __P((struct vm_page *, struct vm_page **)); 116 }; 117 118 /* pager flags [mostly for flush] */ 119 120 #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */ 121 #define PGO_SYNCIO 0x002 /* if PGO_CLEANIT: use sync I/O? */ 122 #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */ 123 #define PGO_FREE 0x008 /* free flushed pages */ 124 /* if PGO_FREE is not set then the pages stay where they are. */ 125 126 #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */ 127 #define PGO_DOACTCLUST 0x020 /* flag to mk_pcluster to include active */ 128 #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */ 129 #define PGO_PDFREECLUST 0x080 /* daemon's free cluster flag [uvm_pager_put] */ 130 #define PGO_REALLOCSWAP 0x100 /* reallocate swap area [pager_dropcluster] */ 131 #define PGO_OVERWRITE 0x200 /* pages will be overwritten before unlocked */ 132 #define PGO_WEAK 0x400 /* "weak" put, for nfs */ 133 #define PGO_PASTEOF 0x800 /* allow allocation of pages past EOF */ 134 135 /* page we are not interested in getting */ 136 #define PGO_DONTCARE ((struct vm_page *) -1L) /* [get only] */ 137 138 #ifdef _KERNEL 139 140 /* 141 * handle inline options 142 */ 143 144 #ifdef UVM_PAGER_INLINE 145 #define PAGER_INLINE static __inline 146 #else 147 #define PAGER_INLINE /* nothing */ 148 #endif /* UVM_PAGER_INLINE */ 149 150 /* 151 * prototypes 152 */ 153 154 void uvm_pager_dropcluster __P((struct uvm_object *, 155 struct vm_page *, struct vm_page **, 156 int *, int)); 157 void uvm_pager_init __P((void)); 158 int uvm_pager_put __P((struct uvm_object *, struct vm_page *, 159 struct vm_page ***, int *, int, 160 voff_t, voff_t)); 161 162 PAGER_INLINE struct vm_page *uvm_pageratop __P((vaddr_t)); 163 164 vaddr_t uvm_pagermapin __P((struct vm_page **, int, int)); 165 void uvm_pagermapout __P((vaddr_t, int)); 166 struct vm_page **uvm_mk_pcluster __P((struct uvm_object *, struct vm_page **, 167 int *, struct vm_page *, int, 168 voff_t, voff_t)); 169 170 /* Flags to uvm_pagermapin() */ 171 #define UVMPAGER_MAPIN_WAITOK 0x01 /* it's okay to wait */ 172 #define UVMPAGER_MAPIN_READ 0x02 /* host <- device */ 173 #define UVMPAGER_MAPIN_WRITE 0x00 /* device -> host (pseudo flag) */ 174 175 /* 176 * XXX 177 * this is needed until the device strategy interface 178 * is changed to do physically-addressed i/o. 179 */ 180 181 #ifndef PAGER_MAP_SIZE 182 #define PAGER_MAP_SIZE (16 * 1024 * 1024) 183 #endif 184 185 #endif /* _KERNEL */ 186 187 #endif /* _UVM_UVM_PAGER_H_ */ 188
Indexes created Wed Oct 22 13:09:56 GMT 2025