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[apple/xnu.git] / osfmk / mach / memory_object_control.defs

/*
 * 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
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 * 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@
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/*
 * @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:	mach/memory_object_control.defs
 *
 * Abstract:
 *	Basic Mach external memory management interface declaration.
 */

subsystem
#if	KERNEL_USER
	  KernelUser
#endif	/* KERNEL_USER */
#if	KERNEL_SERVER
	  KernelServer
#endif	/* KERNEL_SERVER */
		     memory_object_control 2000;

#ifdef	MACH_KERNEL
#include <advisory_pageout.h>
#endif	/* MACH_KERNEL */

#include <mach/std_types.defs>
#include <mach/mach_types.defs>

/*
 *      Retrieves the attributes currently associated with
 *      a memory object.
 */
routine memory_object_get_attributes(
                memory_control	: memory_object_control_t;
		flavor		: memory_object_flavor_t;
	out	attributes	: memory_object_info_t, CountInOut);


routine memory_object_change_attributes(
                memory_control	: memory_object_control_t;
                flavor          : memory_object_flavor_t;
        	attributes      : memory_object_info_t
		);

routine memory_object_synchronize_completed (
		memory_control	: memory_object_control_t;
		offset		: memory_object_offset_t;
		length		: vm_offset_t);

/*
 *	Control use of the data associated with the given
 *	memory object.  For each page in the given range,
 *	perform the following operations, in order:
 *		1)  restrict access to the page (disallow
 *		    forms specified by "prot");
 *		2)  write back modifications (if "should_return"
 *		    is RETURN_DIRTY and the page is dirty, or
 *		    "should_return" is RETURN_ALL and the page
 * 		    is either dirty or precious); and,
 *		3)  flush the cached copy (if "should_flush"
 *		    is asserted).
 *	The set of pages is defined by a starting offset
 *	("offset") and size ("size").  Only pages with the
 *	same page alignment as the starting offset are
 *	considered.
 */
routine memory_object_lock_request(
		memory_control	: memory_object_control_t;
		offset		: memory_object_offset_t;
		size		: memory_object_size_t;
	out	resid_offset	: memory_object_offset_t;
	out	io_errno	: integer_t;
		should_return	: memory_object_return_t;
		flags		: integer_t;
		lock_value	: vm_prot_t
		);


/*
 */
routine memory_object_destroy(
		memory_control	: memory_object_control_t;
		reason		: kern_return_t);

/*
 *	The pager gets memory_object_data_request and memory_object_data_return
 *	calls to inform it that data within the memory object needs to be
 *	manipulated.  Those requests simply identify the range in the memory
 *	object that needs servicing, but not the data itself.  The pager
 *	turns around and requests one (or several) Universal Page Lists (UPLs)
 *	from the VM cache object associated with the memory object via one
 *	of the following calls.  These UPLs are then committed (or aborted)
 *	in whole (or in ranges) as the processing completes.
 */

routine memory_object_upl_request(
		memory_control	: memory_object_control_t;
	in	offset		: memory_object_offset_t;
	in	size		: vm_size_t;
	out	upl		: upl_t;
	out	page_list	: upl_page_info_array_t, CountInOut;
	in	cntrl_flags	: integer_t);

routine memory_object_super_upl_request(
		memory_control		: memory_object_control_t;
	in	offset		: memory_object_offset_t;
	in	size		: vm_size_t;
	in	super_size	: vm_size_t;
	out	upl		: upl_t;
	out	page_list	: upl_page_info_array_t, CountInOut;
	in	cntrl_flags	: integer_t);

/*
 * This functions allows a single page to be manipulated with less overhead
 * than creating a UPL.
 */
routine memory_object_page_op(
		memory_control	: memory_object_control_t;
	in	offset		: memory_object_offset_t;
	in	ops		: integer_t;
	out	phys_entry	: uint32_t;
	out	flags		: integer_t);

routine memory_object_recover_named(
		memory_control	: memory_object_control_t;
	in	wait_on_terminating : boolean_t);

routine memory_object_release_name(
		memory_control	: memory_object_control_t;
		flags		: integer_t);

routine memory_object_range_op(
		memory_control	: memory_object_control_t;
	in	offset_beg	: memory_object_offset_t;
	in	offset_end	: memory_object_offset_t;
	in      ops             : integer_t;
	out     range		: integer_t);