osfmk/mach/memory_object.defs

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  */
  58 /*
  59  * File:        mach/memory_object.defs
  60  *
  61  * Abstract:
  62  *      Basic Mach external memory management interface declaration.
  63  */
  64
  65 subsystem
  66 #if     KERNEL_USER
  67           KernelUser
  68 #endif  /* KERNEL_USER */
  69 #if     KERNEL_SERVER
  70           KernelServer
  71 #endif  /* KERNEL_SERVER */
  72                      memory_object 2200;
  73
  74 #ifdef  MACH_KERNEL
  75 #include <advisory_pageout.h>
  76 #endif  /* MACH_KERNEL */
  77
  78 #include <mach/std_types.defs>
  79 #include <mach/mach_types.defs>
  80
  81 #if     KERNEL_SERVER
  82 serverprefix dp_;
  83 #endif
  84
  85 /*
  86  *      Initialize the specified memory object, providing
  87  *      a memory object control reference on which to make
  88  *   cache control calls.
  89  *      [To allow the mapping of this object to be used, the
  90  *      memory manager must call memory_object_set_attributes,
  91  *      specifying the "ready" parameter as TRUE.  To reject
  92  *      all mappings of this object, the memory manager may
  93  *      use memory_object_destroy.]
  94  */
  95 routine memory_object_init(
  96                 memory_object           : memory_object_t;
  97                 memory_control  : memory_object_control_t;
  98                 memory_object_page_size : memory_object_cluster_size_t);
  99
 100
 101 /*
 102  *      Indicates that the specified memory object is no longer
 103  *      mapped (or cached -- see memory_object_set_attributes),
 104  *      and that further mappings will cause another memory_object_init
 105  *      call to be made.
 106  *
 107  *      [The kernel will release its reference on the memory object
 108  *      after this call returns.  The memory object control associated
 109  *      with the memory object is no longer usable - the pager should
 110  *      drop the control reference granted to it by memory_object_init.]
 111  */
 112 routine memory_object_terminate(
 113                 memory_object           : memory_object_t);
 114
 115 /*
 116  *      Request data from this memory object.  At least
 117  *      the specified data should be returned with at
 118  *      least the specified access permitted.
 119  *
 120  *      [Response should be upl commit over the specified range.]
 121  */
 122 routine memory_object_data_request(
 123                 memory_object           : memory_object_t;
 124                 offset                  : memory_object_offset_t;
 125                 length                  : memory_object_cluster_size_t;
 126                 desired_access          : vm_prot_t;
 127                 fault_info              : memory_object_fault_info_t);
 128
 129 /*
 130  *      Return data to manager.  This call is used in place of data_write
 131  *      for objects initialized by object_ready instead of set_attributes.
 132  *      This call indicates whether the returned data is dirty and whether
 133  *      the kernel kept a copy.  Precious data remains precious if the
 134  *      kernel keeps a copy.  The indication that the kernel kept a copy
 135  *      is only a hint if the data is not precious; the cleaned copy may
 136  *      be discarded without further notifying the manager.
 137  *
 138  *      [response should be a upl_commit over the range specified]
 139  */
 140 routine   memory_object_data_return(
 141                 memory_object           : memory_object_t;
 142                 offset                  : memory_object_offset_t;
 143                 size                    : memory_object_cluster_size_t;
 144         out     resid_offset            : memory_object_offset_t;
 145         out     io_error                : int;
 146                 dirty                   : boolean_t;
 147                 kernel_copy             : boolean_t;
 148                 upl_flags               : int);
 149
 150 /*
 151  *      Provide initial data contents for this region of
 152  *      the memory object.  If data has already been written
 153  *      to the object, this value must be discarded; otherwise,
 154  *      this call acts identically to memory_object_data_return.
 155  *
 156  *      [response should be UPL commit over the specified range.]
 157  */
 158 routine memory_object_data_initialize(
 159                 memory_object           : memory_object_t;
 160                 offset                  : memory_object_offset_t;
 161                 size                    : memory_object_cluster_size_t);
 162
 163 /*
 164  *      Request that the specified portion of this
 165  *      memory object be unlocked to allow the specified
 166  *      forms of access; the kernel already has the data.
 167  *
 168  *      [Response should be memory_object_lock_request when
 169  *      the operation is fully complete.]
 170  */
 171 routine memory_object_data_unlock(
 172                 memory_object           : memory_object_t;
 173                 offset                  : memory_object_offset_t;
 174                 size                    : memory_object_size_t;
 175                 desired_access          : vm_prot_t);
 176
 177
 178 /*
 179  *      Request that the specified portion of this
 180  *      memory object be synchronized with its backing
 181  *      store according to the supplied flags.
 182  *
 183  *      [Response should be memory_object_synchronize_completed when
 184  *      the operation is fully complete.]
 185  */
 186 routine memory_object_synchronize(
 187                 memory_object           : memory_object_t;
 188                 offset                  : memory_object_offset_t;
 189                 size                    : memory_object_size_t;
 190                 sync_flags              : vm_sync_t );
 191
 192 /*
 193  *      Notify the pager that the specified memory object
 194  *      has no other (mapped) references besides the named
 195  *      reference held by the pager itself.
 196  *
 197  *      [Response should be a release of the named reference when
 198  *      the pager deems that appropriate.]
 199  */
 200 routine memory_object_map(
 201                 memory_object           : memory_object_t;
 202                 prot                    : vm_prot_t);
 203 routine memory_object_last_unmap(
 204                 memory_object           : memory_object_t);
 205
 206 /* vim: set ft=c : */