uvm_pager.h revision 1.12
1 /* $NetBSD: uvm_pager.h,v 1.12 2000/03/26 20:54:47 kleink 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 #ifndef _UVM_UVM_PAGER_H_ 38 #define _UVM_UVM_PAGER_H_ 39 40 /* 41 * uvm_pager.h 42 */ 43 44 /* 45 * async pager i/o descriptor structure 46 */ 47 48 TAILQ_HEAD(uvm_aiohead, uvm_aiodesc); 49 50 struct uvm_aiodesc { 51 void (*aiodone) __P((struct uvm_aiodesc *)); 52 /* aio done function */ 53 vaddr_t kva; /* KVA of mapped page(s) */ 54 int npages; /* # of pages in I/O req */ 55 void *pd_ptr; /* pager-dependent pointer */ 56 TAILQ_ENTRY(uvm_aiodesc) aioq; /* linked list of aio's */ 57 }; 58 59 /* 60 * pager ops 61 */ 62 63 struct uvm_pagerops { 64 void (*pgo_init) __P((void));/* init pager */ 65 void (*pgo_reference) /* add reference to obj */ 66 __P((struct uvm_object *)); 67 void (*pgo_detach) /* drop reference to obj */ 68 __P((struct uvm_object *)); 69 int (*pgo_fault) /* special nonstd fault fn */ 70 __P((struct uvm_faultinfo *, vaddr_t, 71 vm_page_t *, int, int, vm_fault_t, 72 vm_prot_t, int)); 73 boolean_t (*pgo_flush) /* flush pages out of obj */ 74 __P((struct uvm_object *, voff_t, voff_t, int)); 75 int (*pgo_get) /* get/read page */ 76 __P((struct uvm_object *, voff_t, 77 vm_page_t *, int *, int, vm_prot_t, int, int)); 78 int (*pgo_asyncget) /* start async get */ 79 __P((struct uvm_object *, voff_t, int)); 80 int (*pgo_put) /* put/write page */ 81 __P((struct uvm_object *, vm_page_t *, 82 int, boolean_t)); 83 void (*pgo_cluster) /* return range of cluster */ 84 __P((struct uvm_object *, voff_t, voff_t *, 85 voff_t *)); 86 struct vm_page ** (*pgo_mk_pcluster) /* make "put" cluster */ 87 __P((struct uvm_object *, struct vm_page **, 88 int *, struct vm_page *, int, voff_t, 89 voff_t)); 90 void (*pgo_shareprot) /* share protect */ 91 __P((vm_map_entry_t, vm_prot_t)); 92 void (*pgo_aiodone) /* async iodone */ 93 __P((struct uvm_aiodesc *)); 94 boolean_t (*pgo_releasepg) /* release page */ 95 __P((struct vm_page *, struct vm_page **)); 96 }; 97 98 /* pager flags [mostly for flush] */ 99 100 #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */ 101 #define PGO_SYNCIO 0x002 /* if PGO_CLEAN: use sync I/O? */ 102 /* 103 * obviously if neither PGO_INVALIDATE or PGO_FREE are set then the pages 104 * stay where they are. 105 */ 106 #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */ 107 #define PGO_FREE 0x008 /* free flushed pages */ 108 109 #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */ 110 #define PGO_DOACTCLUST 0x020 /* flag to mk_pcluster to include active */ 111 #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */ 112 #define PGO_PDFREECLUST 0x080 /* daemon's free cluster flag [uvm_pager_put] */ 113 #define PGO_REALLOCSWAP 0x100 /* reallocate swap area [pager_dropcluster] */ 114 115 /* page we are not interested in getting */ 116 #define PGO_DONTCARE ((struct vm_page *) -1) /* [get only] */ 117 118 #ifdef _KERNEL 119 120 /* 121 * handle inline options 122 */ 123 124 #ifdef UVM_PAGER_INLINE 125 #define PAGER_INLINE static __inline 126 #else 127 #define PAGER_INLINE /* nothing */ 128 #endif /* UVM_PAGER_INLINE */ 129 130 /* 131 * prototypes 132 */ 133 134 void uvm_pager_dropcluster __P((struct uvm_object *, 135 struct vm_page *, struct vm_page **, 136 int *, int)); 137 void uvm_pager_init __P((void)); 138 int uvm_pager_put __P((struct uvm_object *, struct vm_page *, 139 struct vm_page ***, int *, int, 140 voff_t, voff_t)); 141 142 PAGER_INLINE struct vm_page *uvm_pageratop __P((vaddr_t)); 143 144 vaddr_t uvm_pagermapin __P((struct vm_page **, int, 145 struct uvm_aiodesc **, int)); 146 void uvm_pagermapout __P((vaddr_t, int)); 147 struct vm_page **uvm_mk_pcluster __P((struct uvm_object *, struct vm_page **, 148 int *, struct vm_page *, int, 149 voff_t, voff_t)); 150 void uvm_shareprot __P((vm_map_entry_t, vm_prot_t)); 151 152 #endif /* _KERNEL */ 153 154 #endif /* _UVM_UVM_PAGER_H_ */ 155
Indexes created Fri Sep 26 08:10:20 GMT 2025