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1.1 root 1: /*
2: * Copyright (c) 1991 Regents of the University of California.
3: * 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
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 the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: *
1.1.1.2 ! root 36: * from: @(#)vm_object.h 7.3 (Berkeley) 4/21/91
! 37: * vm_object.h,v 1.3 1993/05/20 03:59:36 cgd Exp
1.1 root 38: *
39: *
40: * Copyright (c) 1987, 1990 Carnegie-Mellon University.
41: * All rights reserved.
42: *
43: * Authors: Avadis Tevanian, Jr., Michael Wayne Young
44: *
45: * Permission to use, copy, modify and distribute this software and
46: * its documentation is hereby granted, provided that both the copyright
47: * notice and this permission notice appear in all copies of the
48: * software, derivative works or modified versions, and any portions
49: * thereof, and that both notices appear in supporting documentation.
50: *
51: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
52: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
53: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
54: *
55: * Carnegie Mellon requests users of this software to return to
56: *
57: * Software Distribution Coordinator or [email protected]
58: * School of Computer Science
59: * Carnegie Mellon University
60: * Pittsburgh PA 15213-3890
61: *
62: * any improvements or extensions that they make and grant Carnegie the
63: * rights to redistribute these changes.
64: */
65:
1.1.1.2 ! root 66: #ifndef _VM_VM_OBJECT_H_
! 67: #define _VM_VM_OBJECT_H_
! 68:
1.1 root 69: /*
70: * Virtual memory object module definitions.
71: */
72:
73: #include <vm/vm_pager.h>
74:
75: /*
76: * Types defined:
77: *
78: * vm_object_t Virtual memory object.
79: */
80:
81: struct vm_object {
82: queue_chain_t memq; /* Resident memory */
83: queue_chain_t object_list; /* list of all objects */
84: simple_lock_data_t Lock; /* Synchronization */
85: int LockHolder;
86: int ref_count; /* How many refs?? */
87: vm_size_t size; /* Object size */
88: int resident_page_count;
89: /* number of resident pages */
90: struct vm_object *copy; /* Object that holds copies of
91: my changed pages */
92: vm_pager_t pager; /* Where to get data */
93: boolean_t pager_ready; /* Have pager fields been filled? */
94: vm_offset_t paging_offset; /* Offset into paging space */
95: struct vm_object *shadow; /* My shadow */
96: vm_offset_t shadow_offset; /* Offset in shadow */
97: unsigned int
98: paging_in_progress:16,
99: /* Paging (in or out) - don't
100: collapse or destroy */
101: /* boolean_t */ can_persist:1, /* allow to persist */
102: /* boolean_t */ internal:1; /* internally created object */
103: queue_chain_t cached_list; /* for persistence */
104: };
105:
106: typedef struct vm_object *vm_object_t;
107:
108: struct vm_object_hash_entry {
109: queue_chain_t hash_links; /* hash chain links */
110: vm_object_t object; /* object we represent */
111: };
112:
113: typedef struct vm_object_hash_entry *vm_object_hash_entry_t;
114:
115: #ifdef KERNEL
116: queue_head_t vm_object_cached_list; /* list of objects persisting */
117: int vm_object_cached; /* size of cached list */
118: simple_lock_data_t vm_cache_lock; /* lock for object cache */
119:
120: queue_head_t vm_object_list; /* list of allocated objects */
121: long vm_object_count; /* count of all objects */
122: simple_lock_data_t vm_object_list_lock;
123: /* lock for object list and count */
124:
125: vm_object_t kernel_object; /* the single kernel object */
126: vm_object_t kmem_object;
127:
128: #define vm_object_cache_lock() simple_lock(&vm_cache_lock)
129: #define vm_object_cache_unlock() simple_unlock(&vm_cache_lock)
130: #endif KERNEL
131:
132: /*
133: * Declare procedures that operate on VM objects.
134: */
135:
136: void vm_object_init ();
137: void vm_object_terminate();
138: vm_object_t vm_object_allocate();
139: void vm_object_reference();
140: void vm_object_deallocate();
141: void vm_object_pmap_copy();
142: void vm_object_pmap_remove();
143: void vm_object_page_remove();
144: void vm_object_shadow();
145: void vm_object_copy();
146: void vm_object_collapse();
147: vm_object_t vm_object_lookup();
148: void vm_object_enter();
149: void vm_object_setpager();
150: #define vm_object_cache(pager) pager_cache(vm_object_lookup(pager),TRUE)
151: #define vm_object_uncache(pager) pager_cache(vm_object_lookup(pager),FALSE)
152:
153: void vm_object_cache_clear();
154: void vm_object_print();
155:
156: #if VM_OBJECT_DEBUG
157: #define vm_object_lock_init(object) { simple_lock_init(&(object)->Lock); (object)->LockHolder = 0; }
158: #define vm_object_lock(object) { simple_lock(&(object)->Lock); (object)->LockHolder = (int) current_thread(); }
159: #define vm_object_unlock(object) { (object)->LockHolder = 0; simple_unlock(&(object)->Lock); }
160: #define vm_object_lock_try(object) (simple_lock_try(&(object)->Lock) ? ( ((object)->LockHolder = (int) current_thread()) , TRUE) : FALSE)
161: #define vm_object_sleep(event, object, interruptible) \
162: { (object)->LockHolder = 0; thread_sleep((event), &(object)->Lock, (interruptible)); }
163: #else VM_OBJECT_DEBUG
164: #define vm_object_lock_init(object) simple_lock_init(&(object)->Lock)
165: #define vm_object_lock(object) simple_lock(&(object)->Lock)
166: #define vm_object_unlock(object) simple_unlock(&(object)->Lock)
167: #define vm_object_lock_try(object) simple_lock_try(&(object)->Lock)
168: #define vm_object_sleep(event, object, interruptible) \
169: thread_sleep((event), &(object)->Lock, (interruptible))
170: #endif VM_OBJECT_DEBUG
171:
1.1.1.2 ! root 172: #endif /* !_VM_VM_OBJECT_H_ */
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