| 1 | /* $NetBSD: uvm_pager.h,v 1.43 2012/04/29 22:54:01 chs 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 |
| 101 | |
| 102 | /* |
| 103 | * uvm_pager.h |
| 104 | */ |
| 105 | |
| 106 | /* |
| 107 | * forward structure declarations |
| 108 | */ |
| 109 | |
| 110 | struct uvm_faultinfo; |
| 111 | |
| 112 | /* |
| 113 | * pager ops |
| 114 | */ |
| 115 | |
| 116 | struct { |
| 117 | |
| 118 | /* init pager */ |
| 119 | void (*)(void); |
| 120 | |
| 121 | /* add reference to obj */ |
| 122 | void (*)(struct uvm_object *); |
| 123 | |
| 124 | /* drop reference to obj */ |
| 125 | void (*)(struct uvm_object *); |
| 126 | |
| 127 | /* special non-standard fault processing */ |
| 128 | int (*)(struct uvm_faultinfo *, vaddr_t, struct vm_page **, |
| 129 | int, int, vm_prot_t, int); |
| 130 | |
| 131 | /* get/read pages */ |
| 132 | int (*)(struct uvm_object *, voff_t, struct vm_page **, |
| 133 | int *, int, vm_prot_t, int, int); |
| 134 | |
| 135 | /* put/write pages */ |
| 136 | int (*)(struct uvm_object *, voff_t, voff_t, int); |
| 137 | }; |
| 138 | |
| 139 | /* pager flags [mostly for flush] */ |
| 140 | |
| 141 | #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */ |
| 142 | #define PGO_SYNCIO 0x002 /* use sync I/O */ |
| 143 | #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */ |
| 144 | #define PGO_FREE 0x008 /* free flushed pages */ |
| 145 | /* if PGO_FREE is not set then the pages stay where they are. */ |
| 146 | |
| 147 | #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */ |
| 148 | #define PGO_JOURNALLOCKED 0x020 /* journal is already locked [put] */ |
| 149 | #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */ |
| 150 | #define PGO_BUSYFAIL 0x080 /* fail if a page is busy [put] */ |
| 151 | #define PGO_OVERWRITE 0x200 /* pages will be overwritten before unlocked */ |
| 152 | #define PGO_PASTEOF 0x400 /* allow allocation of pages past EOF */ |
| 153 | #define PGO_NOBLOCKALLOC 0x800 /* backing block allocation is not needed */ |
| 154 | #define PGO_NOTIMESTAMP 0x1000 /* don't mark object accessed/modified */ |
| 155 | #define PGO_RECLAIM 0x2000 /* object is being reclaimed */ |
| 156 | #define PGO_GLOCKHELD 0x4000 /* genfs_node's lock is already held */ |
| 157 | #define PGO_LAZY 0x8000 /* equivalent of MNT_LAZY / FSYNC_LAZY */ |
| 158 | |
| 159 | /* page we are not interested in getting */ |
| 160 | #define PGO_DONTCARE ((struct vm_page *) -1L) /* [get only] */ |
| 161 | |
| 162 | #ifdef _KERNEL |
| 163 | |
| 164 | /* |
| 165 | * prototypes |
| 166 | */ |
| 167 | |
| 168 | void (void); |
| 169 | void (void); |
| 170 | struct vm_page *(vaddr_t); |
| 171 | vaddr_t (struct vm_page **, int, int); |
| 172 | void (vaddr_t, int); |
| 173 | |
| 174 | extern size_t ; |
| 175 | |
| 176 | /* Flags to uvm_pagermapin() */ |
| 177 | #define 0x01 /* it's okay to wait */ |
| 178 | #define 0x02 /* device -> host */ |
| 179 | #define 0x00 /* host -> device (pseudo flag) */ |
| 180 | |
| 181 | #endif /* _KERNEL */ |
| 182 | |
| 183 | #endif /* _UVM_UVM_PAGER_H_ */ |
| 184 | |