uvm_pager.h revision 1.25
1 /* $NetBSD: uvm_pager.h,v 1.25 2002/03/25 02:08:10 chs 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 * forward structure declarations 86 */ 87 88 struct uvm_faultinfo; 89 90 /* 91 * pager ops 92 */ 93 94 struct uvm_pagerops { 95 96 /* init pager */ 97 void (*pgo_init) __P((void)); 98 99 /* add reference to obj */ 100 void (*pgo_reference)(struct uvm_object *); 101 102 /* drop reference to obj */ 103 void (*pgo_detach)(struct uvm_object *); 104 105 /* special non-standard fault processing */ 106 int (*pgo_fault)(struct uvm_faultinfo *, vaddr_t, struct vm_page **, 107 int, int, vm_fault_t, vm_prot_t, int); 108 109 /* get/read pages */ 110 int (*pgo_get)(struct uvm_object *, voff_t, struct vm_page **, 111 int *, int, vm_prot_t, int, int); 112 113 /* put/write pages */ 114 int (*pgo_put)(struct uvm_object *, voff_t, voff_t, int); 115 }; 116 117 /* pager flags [mostly for flush] */ 118 119 #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */ 120 #define PGO_SYNCIO 0x002 /* if PGO_CLEANIT: use sync I/O? */ 121 #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */ 122 #define PGO_FREE 0x008 /* free flushed pages */ 123 /* if PGO_FREE is not set then the pages stay where they are. */ 124 125 #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */ 126 #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */ 127 #define PGO_OVERWRITE 0x200 /* pages will be overwritten before unlocked */ 128 #define PGO_PASTEOF 0x400 /* allow allocation of pages past EOF */ 129 130 /* page we are not interested in getting */ 131 #define PGO_DONTCARE ((struct vm_page *) -1L) /* [get only] */ 132 133 #ifdef _KERNEL 134 135 /* 136 * handle inline options 137 */ 138 139 #ifdef UVM_PAGER_INLINE 140 #define PAGER_INLINE static __inline 141 #else 142 #define PAGER_INLINE /* nothing */ 143 #endif /* UVM_PAGER_INLINE */ 144 145 /* 146 * prototypes 147 */ 148 149 void uvm_pager_init __P((void)); 150 PAGER_INLINE struct vm_page *uvm_pageratop __P((vaddr_t)); 151 vaddr_t uvm_pagermapin __P((struct vm_page **, int, int)); 152 void uvm_pagermapout __P((vaddr_t, int)); 153 154 /* Flags to uvm_pagermapin() */ 155 #define UVMPAGER_MAPIN_WAITOK 0x01 /* it's okay to wait */ 156 #define UVMPAGER_MAPIN_READ 0x02 /* device -> host */ 157 #define UVMPAGER_MAPIN_WRITE 0x00 /* host -> device (pseudo flag) */ 158 159 /* 160 * XXX 161 * this is needed until the device strategy interface 162 * is changed to do physically-addressed i/o. 163 */ 164 165 #ifndef PAGER_MAP_SIZE 166 #define PAGER_MAP_SIZE (16 * 1024 * 1024) 167 #endif 168 169 #endif /* _KERNEL */ 170 171 #endif /* _UVM_UVM_PAGER_H_ */ 172
Indexes created Sun Sep 28 16:09:52 GMT 2025