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vm_object.h (8216) vm_object.h (9507)
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;
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_ */