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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25: /*
26: * Mach Operating System
27: * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
28: * All Rights Reserved.
29: *
30: * Permission to use, copy, modify and distribute this software and its
31: * documentation is hereby granted, provided that both the copyright
32: * notice and this permission notice appear in all copies of the
33: * software, derivative works or modified versions, and any portions
34: * thereof, and that both notices appear in supporting documentation.
35: *
36: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
37: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
38: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
39: *
40: * Carnegie Mellon requests users of this software to return to
41: *
42: * Software Distribution Coordinator or [email protected]
43: * School of Computer Science
44: * Carnegie Mellon University
45: * Pittsburgh PA 15213-3890
46: *
47: * any improvements or extensions that they make and grant Carnegie Mellon
48: * the rights to redistribute these changes.
49: */
50: /*
51: */
52: /*
53: * File: vm/vm_fault.h
54: *
55: * Page fault handling module declarations.
56: */
57:
58: #ifndef _VM_VM_FAULT_H_
59: #define _VM_VM_FAULT_H_
60:
61: #include <mach/kern_return.h>
62: #include <mach/boolean.h>
63: #include <mach/vm_prot.h>
64: #include <mach/vm_param.h>
65: #include <mach/vm_behavior.h>
66: #include <vm/vm_page.h>
67: #include <vm/vm_object.h>
68: #include <vm/vm_map.h>
69:
70: typedef kern_return_t vm_fault_return_t;
71: #define VM_FAULT_SUCCESS 0
72: #define VM_FAULT_RETRY 1
73: #define VM_FAULT_INTERRUPTED 2
74: #define VM_FAULT_MEMORY_SHORTAGE 3
75: #define VM_FAULT_FICTITIOUS_SHORTAGE 4
76: #define VM_FAULT_MEMORY_ERROR 5
77:
78: extern void vm_fault_init(void);
79:
80: /*
81: * Page fault handling based on vm_object only.
82: */
83:
84: extern vm_fault_return_t vm_fault_page(
85: /* Arguments: */
86: vm_object_t first_object, /* Object to begin search */
87: vm_offset_t first_offset, /* Offset into object */
88: vm_prot_t fault_type, /* What access is requested */
89: boolean_t must_be_resident,/* Must page be resident? */
90: int interruptible,/* how may fault be interrupted */
91: vm_offset_t lo_offset, /* Map entry start */
92: vm_offset_t hi_offset, /* Map entry end */
93: vm_behavior_t behavior, /* Expected paging behavior */
94: /* Modifies in place: */
95: vm_prot_t *protection, /* Protection for mapping */
96: /* Returns: */
97: vm_page_t *result_page, /* Page found, if successful */
98: vm_page_t *top_page, /* Page in top object, if
99: * not result_page. */
100: int *type_of_fault, /* if non-zero, return COW, zero-filled, etc...
101: * used by kernel trace point in vm_fault */
102: /* More arguments: */
103: kern_return_t *error_code, /* code if page is in error */
104: boolean_t no_zero_fill, /* don't fill absent pages */
105: boolean_t data_supply); /* treat as data_supply */
106:
107: extern void vm_fault_cleanup(
108: vm_object_t object,
109: vm_page_t top_page);
110: /*
111: * Page fault handling based on vm_map (or entries therein)
112: */
113:
114: extern kern_return_t vm_fault(
115: vm_map_t map,
116: vm_offset_t vaddr,
117: vm_prot_t fault_type,
118: boolean_t change_wiring);
119:
120: extern kern_return_t vm_fault_wire(
121: vm_map_t map,
122: vm_map_entry_t entry);
123:
124: extern void vm_fault_unwire(
125: vm_map_t map,
126: vm_map_entry_t entry,
127: boolean_t deallocate);
128:
129: extern kern_return_t vm_fault_copy(
130: vm_object_t src_object,
131: vm_offset_t src_offset,
132: vm_size_t *src_size, /* INOUT */
133: vm_object_t dst_object,
134: vm_offset_t dst_offset,
135: vm_map_t dst_map,
136: vm_map_version_t *dst_version,
137: int interruptible);
138:
139: #endif /* _VM_VM_FAULT_H_ */
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