vm_object.h (8216) | vm_object.h (9507) |
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1/* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * The Mach Operating System project at Carnegie-Mellon University. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 47 unchanged lines hidden (view full) --- 56 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 57 * School of Computer Science 58 * Carnegie Mellon University 59 * Pittsburgh PA 15213-3890 60 * 61 * any improvements or extensions that they make and grant Carnegie the 62 * rights to redistribute these changes. 63 * | 1/* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * The Mach Operating System project at Carnegie-Mellon University. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 47 unchanged lines hidden (view full) --- 56 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 57 * School of Computer Science 58 * Carnegie Mellon University 59 * Pittsburgh PA 15213-3890 60 * 61 * any improvements or extensions that they make and grant Carnegie the 62 * rights to redistribute these changes. 63 * |
64 * $Id: vm_object.h,v 1.17 1995/04/09 06:03:51 davidg Exp $ | 64 * $Id: vm_object.h,v 1.18 1995/05/02 05:57:11 davidg Exp $ |
65 */ 66 67/* 68 * Virtual memory object module definitions. 69 */ 70 71#ifndef _VM_OBJECT_ 72#define _VM_OBJECT_ 73 74#ifdef KERNEL 75#include <sys/proc.h> /* XXX for wakeup() */ 76#endif 77 | 65 */ 66 67/* 68 * Virtual memory object module definitions. 69 */ 70 71#ifndef _VM_OBJECT_ 72#define _VM_OBJECT_ 73 74#ifdef KERNEL 75#include <sys/proc.h> /* XXX for wakeup() */ 76#endif 77 |
78#include <vm/vm_page.h> 79#include <vm/vm_pager.h> | 78enum obj_type { OBJT_DEFAULT, OBJT_SWAP, OBJT_VNODE, OBJT_DEVICE }; 79typedef enum obj_type objtype_t; |
80 81/* 82 * Types defined: 83 * 84 * vm_object_t Virtual memory object. 85 */ 86 87struct vm_object { | 80 81/* 82 * Types defined: 83 * 84 * vm_object_t Virtual memory object. 85 */ 86 87struct vm_object { |
88 struct pglist memq; /* Resident memory */ 89 TAILQ_HEAD(rslist, vm_object) reverse_shadow_head; /* objects that this is a shadow for */ | |
90 TAILQ_ENTRY(vm_object) object_list; /* list of all objects */ | 88 TAILQ_ENTRY(vm_object) object_list; /* list of all objects */ |
91 TAILQ_ENTRY(vm_object) reverse_shadow_list; /* chain of objects that are shadowed */ 92 TAILQ_ENTRY(vm_object) cached_list; /* for persistence */ | 89 TAILQ_ENTRY(vm_object) cached_list; /* list of cached (persistent) objects */ 90 TAILQ_HEAD(, vm_object) shadow_head; /* objects that this is a shadow for */ 91 TAILQ_ENTRY(vm_object) shadow_list; /* chain of shadow objects */ 92 TAILQ_HEAD(, vm_page) memq; /* list of resident pages */ 93 objtype_t type; /* type of pager */ |
93 vm_size_t size; /* Object size */ 94 int ref_count; /* How many refs?? */ 95 u_short flags; /* see below */ 96 u_short paging_in_progress; /* Paging (in or out) so don't collapse or destroy */ 97 int resident_page_count; /* number of resident pages */ | 94 vm_size_t size; /* Object size */ 95 int ref_count; /* How many refs?? */ 96 u_short flags; /* see below */ 97 u_short paging_in_progress; /* Paging (in or out) so don't collapse or destroy */ 98 int resident_page_count; /* number of resident pages */ |
98 vm_pager_t pager; /* Where to get data */ | |
99 vm_offset_t paging_offset; /* Offset into paging space */ | 99 vm_offset_t paging_offset; /* Offset into paging space */ |
100 struct vm_object *shadow; /* My shadow */ 101 vm_offset_t shadow_offset; /* Offset in shadow */ | 100 struct vm_object *backing_object; /* object that I'm a shadow of */ 101 vm_offset_t backing_object_offset;/* Offset in backing object */ |
102 struct vm_object *copy; /* Object that holds copies of my changed pages */ 103 vm_offset_t last_read; /* last read in object -- detect seq behavior */ | 102 struct vm_object *copy; /* Object that holds copies of my changed pages */ 103 vm_offset_t last_read; /* last read in object -- detect seq behavior */ |
104 TAILQ_ENTRY(vm_object) pager_object_list; /* list of all objects of this pager type */ 105 void *handle; 106 void *pg_data; 107 union { 108 struct { 109 vm_size_t vnp_size; /* Current size of file */ 110 } vnp; 111 struct { 112 TAILQ_HEAD(, vm_page) devp_pglist; /* list of pages allocated */ 113 } devp; 114 } un_pager; |
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104}; 105 106/* 107 * Flags 108 */ 109#define OBJ_CANPERSIST 0x0001 /* allow to persist */ | 115}; 116 117/* 118 * Flags 119 */ 120#define OBJ_CANPERSIST 0x0001 /* allow to persist */ |
110#define OBJ_INTERNAL 0x0002 /* internally created object */ 111#define OBJ_ACTIVE 0x0004 /* used to mark active objects */ 112#define OBJ_DEAD 0x0008 /* used to mark dead objects during rundown */ 113#define OBJ_ILOCKED 0x0010 /* lock from modification */ 114#define OBJ_ILOCKWT 0x0020 /* wait for lock from modification */ | 121#define OBJ_ACTIVE 0x0004 /* active objects */ 122#define OBJ_DEAD 0x0008 /* dead objects (during rundown) */ |
115#define OBJ_PIPWNT 0x0040 /* paging in progress wanted */ | 123#define OBJ_PIPWNT 0x0040 /* paging in progress wanted */ |
116#define OBJ_WRITEABLE 0x0080 /* object has been made writeable */ | 124#define OBJ_WRITEABLE 0x0080 /* object has been made writable */ |
117 | 125 |
118LIST_HEAD(vm_object_hash_head, vm_object_hash_entry); | |
119 | 126 |
120struct vm_object_hash_entry { 121 LIST_ENTRY(vm_object_hash_entry) hash_links; /* hash chain links */ 122 vm_object_t object; /* object represened */ 123}; 124 125typedef struct vm_object_hash_entry *vm_object_hash_entry_t; 126 | |
127#ifdef KERNEL 128extern int vm_object_cache_max; 129 130TAILQ_HEAD(object_q, vm_object); 131 132struct object_q vm_object_cached_list; /* list of objects persisting */ 133int vm_object_cached; /* size of cached list */ | 127#ifdef KERNEL 128extern int vm_object_cache_max; 129 130TAILQ_HEAD(object_q, vm_object); 131 132struct object_q vm_object_cached_list; /* list of objects persisting */ 133int vm_object_cached; /* size of cached list */ |
134simple_lock_data_t vm_cache_lock; /* lock for object cache */ | |
135 136struct object_q vm_object_list; /* list of allocated objects */ 137long vm_object_count; /* count of all objects */ | 134 135struct object_q vm_object_list; /* list of allocated objects */ 136long vm_object_count; /* count of all objects */ |
138simple_lock_data_t vm_object_list_lock; | |
139 140 /* lock for object list and count */ 141 142vm_object_t kernel_object; /* the single kernel object */ 143vm_object_t kmem_object; 144 | 137 138 /* lock for object list and count */ 139 140vm_object_t kernel_object; /* the single kernel object */ 141vm_object_t kmem_object; 142 |
145#define vm_object_cache_lock() simple_lock(&vm_cache_lock) 146#define vm_object_cache_unlock() simple_unlock(&vm_cache_lock) | |
147#endif /* KERNEL */ 148 | 143#endif /* KERNEL */ 144 |
149#if 1 150#define vm_object_lock_init(object) simple_lock_init(&(object)->Lock) 151#define vm_object_lock(object) simple_lock(&(object)->Lock) 152#define vm_object_unlock(object) simple_unlock(&(object)->Lock) 153#define vm_object_lock_try(object) simple_lock_try(&(object)->Lock) 154#endif 155 | |
156#ifdef KERNEL 157static __inline void 158vm_object_pip_wakeup(vm_object_t object) 159{ 160 object->paging_in_progress--; 161 if ((object->flags & OBJ_PIPWNT) && object->paging_in_progress == 0) { 162 object->flags &= ~OBJ_PIPWNT; 163 wakeup(object); 164 } 165} 166 | 145#ifdef KERNEL 146static __inline void 147vm_object_pip_wakeup(vm_object_t object) 148{ 149 object->paging_in_progress--; 150 if ((object->flags & OBJ_PIPWNT) && object->paging_in_progress == 0) { 151 object->flags &= ~OBJ_PIPWNT; 152 wakeup(object); 153 } 154} 155 |
167vm_object_t vm_object_allocate __P((vm_size_t)); | 156vm_object_t vm_object_allocate __P((objtype_t, vm_size_t)); |
168void vm_object_cache_clear __P((void)); 169void vm_object_cache_trim __P((void)); 170boolean_t vm_object_coalesce __P((vm_object_t, vm_object_t, vm_offset_t, vm_offset_t, vm_offset_t, vm_size_t)); 171void vm_object_collapse __P((vm_object_t)); 172void vm_object_copy __P((vm_object_t, vm_offset_t, vm_size_t, vm_object_t *, vm_offset_t *, boolean_t *)); 173void vm_object_deactivate_pages __P((vm_object_t)); 174void vm_object_deallocate __P((vm_object_t)); | 157void vm_object_cache_clear __P((void)); 158void vm_object_cache_trim __P((void)); 159boolean_t vm_object_coalesce __P((vm_object_t, vm_object_t, vm_offset_t, vm_offset_t, vm_offset_t, vm_size_t)); 160void vm_object_collapse __P((vm_object_t)); 161void vm_object_copy __P((vm_object_t, vm_offset_t, vm_size_t, vm_object_t *, vm_offset_t *, boolean_t *)); 162void vm_object_deactivate_pages __P((vm_object_t)); 163void vm_object_deallocate __P((vm_object_t)); |
175void vm_object_enter __P((vm_object_t, vm_pager_t)); | |
176void vm_object_init __P((vm_size_t)); | 164void vm_object_init __P((vm_size_t)); |
177vm_object_t vm_object_lookup __P((vm_pager_t)); 178void _vm_object_page_clean __P((vm_object_t, vm_offset_t, vm_offset_t, boolean_t)); 179void vm_object_page_clean __P((vm_object_t, vm_offset_t, vm_offset_t, boolean_t)); | 165void vm_object_page_clean __P((vm_object_t, vm_offset_t, vm_offset_t, boolean_t, boolean_t)); |
180void vm_object_page_remove __P((vm_object_t, vm_offset_t, vm_offset_t, boolean_t)); 181void vm_object_pmap_copy __P((vm_object_t, vm_offset_t, vm_offset_t)); 182void vm_object_pmap_remove __P((vm_object_t, vm_offset_t, vm_offset_t)); 183void vm_object_print __P((vm_object_t, boolean_t)); 184void vm_object_reference __P((vm_object_t)); | 166void vm_object_page_remove __P((vm_object_t, vm_offset_t, vm_offset_t, boolean_t)); 167void vm_object_pmap_copy __P((vm_object_t, vm_offset_t, vm_offset_t)); 168void vm_object_pmap_remove __P((vm_object_t, vm_offset_t, vm_offset_t)); 169void vm_object_print __P((vm_object_t, boolean_t)); 170void vm_object_reference __P((vm_object_t)); |
185void vm_object_remove __P((vm_pager_t)); | |
186void vm_object_shadow __P((vm_object_t *, vm_offset_t *, vm_size_t)); 187void vm_object_terminate __P((vm_object_t)); 188#endif /* KERNEL */ 189 190#endif /* _VM_OBJECT_ */ | 171void vm_object_shadow __P((vm_object_t *, vm_offset_t *, vm_size_t)); 172void vm_object_terminate __P((vm_object_t)); 173#endif /* KERNEL */ 174 175#endif /* _VM_OBJECT_ */ |