Source to osfmk/vm/vm_pageout.h

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/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
 * All Rights Reserved.
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/*
 */
/*
 *	File:	vm/vm_pageout.h
 *	Author:	Avadis Tevanian, Jr.
 *	Date:	1986
 *
 *	Declarations for the pageout daemon interface.
 */

#ifndef	_VM_VM_PAGEOUT_H_
#define _VM_VM_PAGEOUT_H_

#include <mach/boolean.h>
#include <mach/machine/vm_types.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>

/*
 *	The following ifdef only exists because XMM must (currently)
 *	be given a page at a time.  This should be removed
 *	in the future.
 */
#define	DATA_WRITE_MAX	32
#define	POINTER_T(copy)	(pointer_t)(copy)

/*
 *	Exported routines.
 */
extern void		vm_pageout(void);

extern vm_object_t	vm_pageout_object_allocate(
					vm_page_t	m,
					vm_size_t	size,
					vm_offset_t	offset);

extern void		vm_pageout_object_terminate(
					vm_object_t	object);

extern vm_page_t	vm_pageout_setup(
					vm_page_t	m,
					vm_object_t	new_object,
					vm_offset_t	new_offset);

extern void		vm_pageout_cluster(
					vm_page_t	m);

extern void		vm_pageout_initialize_page(
					vm_page_t	m);

extern void		vm_pageclean_setup(
					vm_page_t	m,
					vm_page_t	new_m,
					vm_object_t	new_object,
					vm_offset_t	new_offset);

extern void		vm_pageclean_copy(
					vm_page_t	m,
					vm_page_t	new_m,
					vm_object_t	new_object,
					vm_offset_t	new_offset);

/* UPL exported routines and structures */

#define UPL_COMPOSITE_PAGE_LIST_MAX 16


#define upl_lock_init(object)	mutex_init(&(object)->Lock, ETAP_VM_OBJ)
#define upl_lock(object)	mutex_lock(&(object)->Lock)
#define upl_unlock(object)	mutex_unlock(&(object)->Lock)


/* universal page list structure */

struct upl {
	decl_mutex_data(,	Lock)	/* Synchronization */
	int		ref_count;
	int		flags;
	vm_object_t	src_object; /* object derived from */
	vm_offset_t	offset;
	vm_size_t	size;	    /* size in bytes of the address space */
	vm_offset_t	kaddr;      /* secondary mapping in kernel */
	vm_object_t	map_object;
};



/* upl struct flags */
#define UPL_PAGE_LIST_MAPPED	0x1
#define UPL_KERNEL_MAPPED 	0x2
#define	UPL_CLEAR_DIRTY		0x4
#define UPL_COMPOSITE_LIST	0x8
#define UPL_INTERNAL		0x10





	 

#endif	/* _VM_VM_PAGEOUT_H_ */