[apple/xnu.git] / osfmk / vm / vm_fault.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 */
/*
 *	File:	vm/vm_fault.h
 *
 *	Page fault handling module declarations.
 */

#ifndef	_VM_VM_FAULT_H_
#define _VM_VM_FAULT_H_

#include <mach/kern_return.h>
#include <mach/boolean.h>
#include <mach/vm_prot.h>
#include <mach/vm_param.h>
#include <mach/vm_behavior.h>
#include <vm/vm_page.h>
#include <vm/vm_object.h>
#include <vm/vm_map.h>

typedef	kern_return_t	vm_fault_return_t;
#define VM_FAULT_SUCCESS		0
#define VM_FAULT_RETRY			1
#define VM_FAULT_INTERRUPTED		2
#define VM_FAULT_MEMORY_SHORTAGE 	3
#define VM_FAULT_FICTITIOUS_SHORTAGE 	4
#define VM_FAULT_MEMORY_ERROR		5

extern void vm_fault_init(void);

/*
 *	Page fault handling based on vm_object only.
 */

extern vm_fault_return_t vm_fault_page(
		/* Arguments: */
		vm_object_t	first_object,	/* Object to begin search */
		vm_object_offset_t first_offset,/* Offset into object */
		vm_prot_t	fault_type,	/* What access is requested */
		boolean_t	must_be_resident,/* Must page be resident? */
		int		interruptible,/* how may fault be interrupted */
		vm_object_offset_t lo_offset,	/* Map entry start */
		vm_object_offset_t hi_offset,	/* Map entry end */
		vm_behavior_t	behavior,	/* Expected paging behavior */
		/* Modifies in place: */
		vm_prot_t	*protection,	/* Protection for mapping */
		/* Returns: */
		vm_page_t	*result_page,	/* Page found, if successful */
		vm_page_t	*top_page,	/* Page in top object, if
						 * not result_page.  */
		int             *type_of_fault, /* if non-zero, return COW, zero-filled, etc...
		                                 * used by kernel trace point in vm_fault */
		/* More arguments: */
		kern_return_t	*error_code,	/* code if page is in error */
		boolean_t	no_zero_fill,	/* don't fill absent pages */
		boolean_t	data_supply,	/* treat as data_supply */
		vm_map_t	map,
		vm_offset_t	vaddr);

extern void vm_fault_cleanup(
		vm_object_t	object,
		vm_page_t	top_page);
/*
 *	Page fault handling based on vm_map (or entries therein)
 */

extern kern_return_t vm_fault(
		vm_map_t	map,
		vm_offset_t	vaddr,
		vm_prot_t	fault_type,
		boolean_t	change_wiring,
		int             interruptible);

extern kern_return_t vm_fault_wire(
		vm_map_t	map,
		vm_map_entry_t	entry,
		pmap_t		pmap);

extern void vm_fault_unwire(
		vm_map_t	map,
		vm_map_entry_t	entry,
		boolean_t	deallocate,
		pmap_t		pmap);

extern kern_return_t	vm_fault_copy(
		vm_object_t		src_object,
		vm_object_offset_t	src_offset,
		vm_size_t		*src_size,	/* INOUT */
		vm_object_t		dst_object,
		vm_object_offset_t	dst_offset,
		vm_map_t		dst_map,
		vm_map_version_t	 *dst_version,
		int			interruptible);

#endif	/* _VM_VM_FAULT_H_ */
Commit	Line	Data
1c79356b A	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 Software.Distribution@CS.CMU.EDU
	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_object_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_object_offset_t lo_offset, /* Map entry start */
92	vm_object_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 */
0b4e3aa0 A	105	boolean_t data_supply, /* treat as data_supply */
	106	vm_map_t map,
	107	vm_offset_t vaddr);
1c79356b A	108
	109	extern void vm_fault_cleanup(
	110	vm_object_t object,
	111	vm_page_t top_page);
	112	/*
	113	* Page fault handling based on vm_map (or entries therein)
	114	*/
	115
	116	extern kern_return_t vm_fault(
	117	vm_map_t map,
	118	vm_offset_t vaddr,
	119	vm_prot_t fault_type,
	120	boolean_t change_wiring,
	121	int interruptible);
	122
	123	extern kern_return_t vm_fault_wire(
	124	vm_map_t map,
	125	vm_map_entry_t entry,
	126	pmap_t pmap);
	127
	128	extern void vm_fault_unwire(
	129	vm_map_t map,
	130	vm_map_entry_t entry,
	131	boolean_t deallocate,
	132	pmap_t pmap);
	133
	134	extern kern_return_t vm_fault_copy(
	135	vm_object_t src_object,
	136	vm_object_offset_t src_offset,
	137	vm_size_t src_size, / INOUT */
	138	vm_object_t dst_object,
	139	vm_object_offset_t dst_offset,
	140	vm_map_t dst_map,
	141	vm_map_version_t *dst_version,
	142	int interruptible);
	143
	144	#endif /* _VM_VM_FAULT_H_ */