uvm_pager.h revision 1.9.4.5
1 /* $NetBSD: uvm_pager.h,v 1.9.4.5 1999/08/09 00:05:56 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 #ifndef _UVM_UVM_PAGER_H_ 38 #define _UVM_UVM_PAGER_H_ 39 40 #include <sys/buf.h> 41 42 /* 43 * uvm_pager.h 44 */ 45 46 /* 47 * pager ops 48 */ 49 50 struct uvm_pagerops { 51 void (*pgo_init) __P((void));/* init pager */ 52 void (*pgo_reference) /* add reference to obj */ 53 __P((struct uvm_object *)); 54 void (*pgo_detach) /* drop reference to obj */ 55 __P((struct uvm_object *)); 56 int (*pgo_fault) /* special nonstd fault fn */ 57 __P((struct uvm_faultinfo *, vaddr_t, 58 vm_page_t *, int, int, vm_fault_t, 59 vm_prot_t, int)); 60 boolean_t (*pgo_flush) /* flush pages out of obj */ 61 __P((struct uvm_object *, voff_t, voff_t, int)); 62 int (*pgo_get) /* get/read page */ 63 __P((struct uvm_object *, voff_t, 64 vm_page_t *, int *, int, vm_prot_t, int, int)); 65 int (*pgo_put) /* put/write page */ 66 __P((struct uvm_object *, vm_page_t *, 67 int, boolean_t)); 68 void (*pgo_cluster) /* return range of cluster */ 69 __P((struct uvm_object *, voff_t, voff_t *, 70 voff_t *)); 71 struct vm_page ** (*pgo_mk_pcluster) /* make "put" cluster */ 72 __P((struct uvm_object *, struct vm_page **, 73 int *, struct vm_page *, int, voff_t, 74 voff_t)); 75 void (*pgo_shareprot) /* share protect */ 76 __P((vm_map_entry_t, vm_prot_t)); 77 void (*pgo_aiodone) /* async iodone */ 78 __P((struct uvm_aiodesc *)); 79 boolean_t (*pgo_releasepg) /* release page */ 80 __P((struct vm_page *, struct vm_page **)); 81 }; 82 83 /* pager flags [mostly for flush] */ 84 85 #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */ 86 #define PGO_SYNCIO 0x002 /* if PGO_CLEAN: use sync I/O? */ 87 /* 88 * if neither PGO_INVALIDATE or PGO_FREE are set then the pages 89 * stay where they are. 90 */ 91 #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */ 92 #define PGO_FREE 0x008 /* free flushed pages */ 93 94 #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */ 95 #define PGO_DOACTCLUST 0x020 /* flag to mk_pcluster to include active */ 96 #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */ 97 #define PGO_PDFREECLUST 0x080 /* daemon's free cluster flag [uvm_pager_put] */ 98 #define PGO_REALLOCSWAP 0x100 /* reallocate swap area [pager_dropcluster] */ 99 #define PGO_OVERWRITE 0x200 /* page will be overwritten immediately */ 100 101 /* page we are not interested in getting */ 102 #define PGO_DONTCARE ((struct vm_page *) -1L) /* [get only] */ 103 104 #ifdef _KERNEL 105 106 /* 107 * handle inline options 108 */ 109 110 #ifdef UVM_PAGER_INLINE 111 #define PAGER_INLINE static __inline 112 #else 113 #define PAGER_INLINE /* nothing */ 114 #endif /* UVM_PAGER_INLINE */ 115 116 /* 117 * prototypes 118 */ 119 120 void uvm_pager_dropcluster __P((struct uvm_object *, 121 struct vm_page *, struct vm_page **, 122 int *, int, int)); 123 void uvm_pager_init __P((void)); 124 int uvm_pager_put __P((struct uvm_object *, struct vm_page *, 125 struct vm_page ***, int *, int, 126 voff_t, voff_t)); 127 128 PAGER_INLINE struct vm_page *uvm_pageratop __P((vaddr_t)); 129 130 vaddr_t uvm_pagermapin __P((struct vm_page **, int, int)); 131 void uvm_pagermapout __P((vaddr_t, int)); 132 struct vm_page **uvm_mk_pcluster __P((struct uvm_object *, struct vm_page **, 133 int *, struct vm_page *, int, 134 voff_t, voff_t)); 135 void uvm_shareprot __P((vm_map_entry_t, vm_prot_t)); 136 int uvm_errno2vmerror __P((int)); 137 138 #endif /* _KERNEL */ 139 140 #endif /* _UVM_UVM_PAGER_H_ */ 141
Indexes created Sun Oct 19 02:09:48 GMT 2025