Source to osfmk/vm/vm_fault.h

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
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/*
 * @OSF_COPYRIGHT@
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/* 
 * 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
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 * thereof, and that both notices appear in supporting documentation.
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 * 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  [email protected]
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 * 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_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_offset_t	lo_offset,	/* Map entry start */
		vm_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 */

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);

extern kern_return_t vm_fault_wire(
		vm_map_t	map,
		vm_map_entry_t	entry);

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

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

#endif	/* _VM_VM_FAULT_H_ */