uvm_pager.h revision 1.10
1 /* $NetBSD: uvm_pager.h,v 1.10 1999/06/21 17:25:12 thorpej 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 *, vaddr_t, 75 vaddr_t, int)); 76 int (*pgo_get) /* get/read page */ 77 __P((struct uvm_object *, vaddr_t, 78 vm_page_t *, int *, int, vm_prot_t, int, int)); 79 int (*pgo_asyncget) /* start async get */ 80 __P((struct uvm_object *, vaddr_t, int)); 81 int (*pgo_put) /* put/write page */ 82 __P((struct uvm_object *, vm_page_t *, 83 int, boolean_t)); 84 void (*pgo_cluster) /* return range of cluster */ 85 __P((struct uvm_object *, vaddr_t, vaddr_t *, 86 vaddr_t *)); 87 struct vm_page ** (*pgo_mk_pcluster) /* make "put" cluster */ 88 __P((struct uvm_object *, struct vm_page **, 89 int *, struct vm_page *, int, vaddr_t, 90 vaddr_t)); 91 void (*pgo_shareprot) /* share protect */ 92 __P((vm_map_entry_t, vm_prot_t)); 93 void (*pgo_aiodone) /* async iodone */ 94 __P((struct uvm_aiodesc *)); 95 boolean_t (*pgo_releasepg) /* release page */ 96 __P((struct vm_page *, struct vm_page **)); 97 }; 98 99 /* pager flags [mostly for flush] */ 100 101 #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */ 102 #define PGO_SYNCIO 0x002 /* if PGO_CLEAN: use sync I/O? */ 103 /* 104 * obviously if neither PGO_INVALIDATE or PGO_FREE are set then the pages 105 * stay where they are. 106 */ 107 #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */ 108 #define PGO_FREE 0x008 /* free flushed pages */ 109 110 #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */ 111 #define PGO_DOACTCLUST 0x020 /* flag to mk_pcluster to include active */ 112 #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */ 113 #define PGO_PDFREECLUST 0x080 /* daemon's free cluster flag [uvm_pager_put] */ 114 #define PGO_REALLOCSWAP 0x100 /* reallocate swap area [pager_dropcluster] */ 115 116 /* page we are not interested in getting */ 117 #define PGO_DONTCARE ((struct vm_page *) -1) /* [get only] */ 118 119 #ifdef _KERNEL 120 121 /* 122 * handle inline options 123 */ 124 125 #ifdef UVM_PAGER_INLINE 126 #define PAGER_INLINE static __inline 127 #else 128 #define PAGER_INLINE /* nothing */ 129 #endif /* UVM_PAGER_INLINE */ 130 131 /* 132 * prototypes 133 */ 134 135 void uvm_pager_dropcluster __P((struct uvm_object *, 136 struct vm_page *, struct vm_page **, 137 int *, int, int)); 138 void uvm_pager_init __P((void)); 139 int uvm_pager_put __P((struct uvm_object *, struct vm_page *, 140 struct vm_page ***, int *, int, 141 vaddr_t, vaddr_t)); 142 143 PAGER_INLINE struct vm_page *uvm_pageratop __P((vaddr_t)); 144 145 vaddr_t uvm_pagermapin __P((struct vm_page **, int, 146 struct uvm_aiodesc **, int)); 147 void uvm_pagermapout __P((vaddr_t, int)); 148 struct vm_page **uvm_mk_pcluster __P((struct uvm_object *, struct vm_page **, 149 int *, struct vm_page *, int, 150 vaddr_t, vaddr_t)); 151 void uvm_shareprot __P((vm_map_entry_t, vm_prot_t)); 152 153 #endif /* _KERNEL */ 154 155 #endif /* _UVM_UVM_PAGER_H_ */ 156
Indexes created Sun Sep 21 20:09:37 GMT 2025