/* * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_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: mach/memory_object.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 2200; #include #include #if KERNEL_SERVER serverprefix dp_; #endif /* * Initialize the specified memory object, providing * a memory object control reference on which to make * cache control calls. * [To allow the mapping of this object to be used, the * memory manager must call memory_object_set_attributes, * specifying the "ready" parameter as TRUE. To reject * all mappings of this object, the memory manager may * use memory_object_destroy.] */ routine memory_object_init( memory_object : memory_object_t; memory_control : memory_object_control_t; memory_object_page_size : memory_object_cluster_size_t); /* * Indicates that the specified memory object is no longer * mapped (or cached -- see memory_object_set_attributes), * and that further mappings will cause another memory_object_init * call to be made. * * [The kernel will release its reference on the memory object * after this call returns. The memory object control associated * with the memory object is no longer usable - the pager should * drop the control reference granted to it by memory_object_init.] */ routine memory_object_terminate( memory_object : memory_object_t); /* * Request data from this memory object. At least * the specified data should be returned with at * least the specified access permitted. * * [Response should be upl commit over the specified range.] */ routine memory_object_data_request( memory_object : memory_object_t; offset : memory_object_offset_t; length : memory_object_cluster_size_t; desired_access : vm_prot_t; fault_info : memory_object_fault_info_t); /* * Return data to manager. This call is used in place of data_write * for objects initialized by object_ready instead of set_attributes. * This call indicates whether the returned data is dirty and whether * the kernel kept a copy. Precious data remains precious if the * kernel keeps a copy. The indication that the kernel kept a copy * is only a hint if the data is not precious; the cleaned copy may * be discarded without further notifying the manager. * * [response should be a upl_commit over the range specified] */ routine memory_object_data_return( memory_object : memory_object_t; offset : memory_object_offset_t; size : memory_object_cluster_size_t; out resid_offset : memory_object_offset_t; out io_error : int; dirty : boolean_t; kernel_copy : boolean_t; upl_flags : int); /* * Provide initial data contents for this region of * the memory object. If data has already been written * to the object, this value must be discarded; otherwise, * this call acts identically to memory_object_data_return. * * [response should be UPL commit over the specified range.] */ routine memory_object_data_initialize( memory_object : memory_object_t; offset : memory_object_offset_t; size : memory_object_cluster_size_t); /* * Request that the specified portion of this * memory object be unlocked to allow the specified * forms of access; the kernel already has the data. * * [Response should be memory_object_lock_request when * the operation is fully complete.] */ routine memory_object_data_unlock( memory_object : memory_object_t; offset : memory_object_offset_t; size : memory_object_size_t; desired_access : vm_prot_t); /* * Request that the specified portion of this * memory object be synchronized with its backing * store according to the supplied flags. * * [Response should be memory_object_synchronize_completed when * the operation is fully complete.] */ routine memory_object_synchronize( memory_object : memory_object_t; offset : memory_object_offset_t; size : memory_object_size_t; sync_flags : vm_sync_t ); /* * Notify the pager that the specified memory object * has no other (mapped) references besides the named * reference held by the pager itself. * * [Response should be a release of the named reference when * the pager deems that appropriate.] */ routine memory_object_map( memory_object : memory_object_t; prot : vm_prot_t); routine memory_object_last_unmap( memory_object : memory_object_t); routine memory_object_data_reclaim( memory_object : memory_object_t; reclaim_backing_store : boolean_t); /* vim: set ft=c : */