osfmk/mach/memory_object.defs

   1 /*
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   8  * Version 2.0 (the 'License'). You may not use this file except in
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  10  * may not be used to create, or enable the creation or redistribution of,
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  13  * terms of an Apple operating system software license agreement.
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  15  * Please obtain a copy of the License at
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  17  *
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  23  * Please see the License for the specific language governing rights and
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  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 #include <mach/std_types.defs>
  75 #include <mach/mach_types.defs>
  76
  77 #if     KERNEL_SERVER
  78 serverprefix dp_;
  79 #endif
  80
  81 /*
  82  *      Initialize the specified memory object, providing
  83  *      a memory object control reference on which to make
  84  *   cache control calls.
  85  *      [To allow the mapping of this object to be used, the
  86  *      memory manager must call memory_object_set_attributes,
  87  *      specifying the "ready" parameter as TRUE.  To reject
  88  *      all mappings of this object, the memory manager may
  89  *      use memory_object_destroy.]
  90  */
  91 routine memory_object_init(
  92                 memory_object           : memory_object_t;
  93                 memory_control  : memory_object_control_t;
  94                 memory_object_page_size : memory_object_cluster_size_t);
  95
  96
  97 /*
  98  *      Indicates that the specified memory object is no longer
  99  *      mapped (or cached -- see memory_object_set_attributes),
 100  *      and that further mappings will cause another memory_object_init
 101  *      call to be made.
 102  *
 103  *      [The kernel will release its reference on the memory object
 104  *      after this call returns.  The memory object control associated
 105  *      with the memory object is no longer usable - the pager should
 106  *      drop the control reference granted to it by memory_object_init.]
 107  */
 108 routine memory_object_terminate(
 109                 memory_object           : memory_object_t);
 110
 111 /*
 112  *      Request data from this memory object.  At least
 113  *      the specified data should be returned with at
 114  *      least the specified access permitted.
 115  *
 116  *      [Response should be upl commit over the specified range.]
 117  */
 118 routine memory_object_data_request(
 119                 memory_object           : memory_object_t;
 120                 offset                  : memory_object_offset_t;
 121                 length                  : memory_object_cluster_size_t;
 122                 desired_access          : vm_prot_t;
 123                 fault_info              : memory_object_fault_info_t);
 124
 125 /*
 126  *      Return data to manager.  This call is used in place of data_write
 127  *      for objects initialized by object_ready instead of set_attributes.
 128  *      This call indicates whether the returned data is dirty and whether
 129  *      the kernel kept a copy.  Precious data remains precious if the
 130  *      kernel keeps a copy.  The indication that the kernel kept a copy
 131  *      is only a hint if the data is not precious; the cleaned copy may
 132  *      be discarded without further notifying the manager.
 133  *
 134  *      [response should be a upl_commit over the range specified]
 135  */
 136 routine   memory_object_data_return(
 137                 memory_object           : memory_object_t;
 138                 offset                  : memory_object_offset_t;
 139                 size                    : memory_object_cluster_size_t;
 140         out     resid_offset            : memory_object_offset_t;
 141         out     io_error                : int;
 142                 dirty                   : boolean_t;
 143                 kernel_copy             : boolean_t;
 144                 upl_flags               : int);
 145
 146 /*
 147  *      Provide initial data contents for this region of
 148  *      the memory object.  If data has already been written
 149  *      to the object, this value must be discarded; otherwise,
 150  *      this call acts identically to memory_object_data_return.
 151  *
 152  *      [response should be UPL commit over the specified range.]
 153  */
 154 routine memory_object_data_initialize(
 155                 memory_object           : memory_object_t;
 156                 offset                  : memory_object_offset_t;
 157                 size                    : memory_object_cluster_size_t);
 158
 159 /*
 160  *      Request that the specified portion of this
 161  *      memory object be unlocked to allow the specified
 162  *      forms of access; the kernel already has the data.
 163  *
 164  *      [Response should be memory_object_lock_request when
 165  *      the operation is fully complete.]
 166  */
 167 routine memory_object_data_unlock(
 168                 memory_object           : memory_object_t;
 169                 offset                  : memory_object_offset_t;
 170                 size                    : memory_object_size_t;
 171                 desired_access          : vm_prot_t);
 172
 173
 174 /*
 175  *      Request that the specified portion of this
 176  *      memory object be synchronized with its backing
 177  *      store according to the supplied flags.
 178  *
 179  *      [Response should be memory_object_synchronize_completed when
 180  *      the operation is fully complete.]
 181  */
 182 routine memory_object_synchronize(
 183                 memory_object           : memory_object_t;
 184                 offset                  : memory_object_offset_t;
 185                 size                    : memory_object_size_t;
 186                 sync_flags              : vm_sync_t );
 187
 188 /*
 189  *      Notify the pager that the specified memory object
 190  *      has no other (mapped) references besides the named
 191  *      reference held by the pager itself.
 192  *
 193  *      [Response should be a release of the named reference when
 194  *      the pager deems that appropriate.]
 195  */
 196 routine memory_object_map(
 197                 memory_object           : memory_object_t;
 198                 prot                    : vm_prot_t);
 199 routine memory_object_last_unmap(
 200                 memory_object           : memory_object_t);
 201
 202 routine memory_object_data_reclaim(
 203                 memory_object           : memory_object_t;
 204                 reclaim_backing_store   : boolean_t);
 205
 206 /* vim: set ft=c : */