reactos/drivers/bus/acpi/acpica/executer/exstoren.c

   1
   2 /******************************************************************************
   3  *
   4  * Module Name: exstoren - AML Interpreter object store support,
   5  *                        Store to Node (namespace object)
   6  *
   7  *****************************************************************************/
   8
   9 /******************************************************************************
  10  *
  11  * 1. Copyright Notice
  12  *
  13  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
  14  * All rights reserved.
  15  *
  16  * 2. License
  17  *
  18  * 2.1. This is your license from Intel Corp. under its intellectual property
  19  * rights.  You may have additional license terms from the party that provided
  20  * you this software, covering your right to use that party's intellectual
  21  * property rights.
  22  *
  23  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  24  * copy of the source code appearing in this file ("Covered Code") an
  25  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  26  * base code distributed originally by Intel ("Original Intel Code") to copy,
  27  * make derivatives, distribute, use and display any portion of the Covered
  28  * Code in any form, with the right to sublicense such rights; and
  29  *
  30  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  31  * license (with the right to sublicense), under only those claims of Intel
  32  * patents that are infringed by the Original Intel Code, to make, use, sell,
  33  * offer to sell, and import the Covered Code and derivative works thereof
  34  * solely to the minimum extent necessary to exercise the above copyright
  35  * license, and in no event shall the patent license extend to any additions
  36  * to or modifications of the Original Intel Code.  No other license or right
  37  * is granted directly or by implication, estoppel or otherwise;
  38  *
  39  * The above copyright and patent license is granted only if the following
  40  * conditions are met:
  41  *
  42  * 3. Conditions
  43  *
  44  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  45  * Redistribution of source code of any substantial portion of the Covered
  46  * Code or modification with rights to further distribute source must include
  47  * the above Copyright Notice, the above License, this list of Conditions,
  48  * and the following Disclaimer and Export Compliance provision.  In addition,
  49  * Licensee must cause all Covered Code to which Licensee contributes to
  50  * contain a file documenting the changes Licensee made to create that Covered
  51  * Code and the date of any change.  Licensee must include in that file the
  52  * documentation of any changes made by any predecessor Licensee.  Licensee
  53  * must include a prominent statement that the modification is derived,
  54  * directly or indirectly, from Original Intel Code.
  55  *
  56  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  57  * Redistribution of source code of any substantial portion of the Covered
  58  * Code or modification without rights to further distribute source must
  59  * include the following Disclaimer and Export Compliance provision in the
  60  * documentation and/or other materials provided with distribution.  In
  61  * addition, Licensee may not authorize further sublicense of source of any
  62  * portion of the Covered Code, and must include terms to the effect that the
  63  * license from Licensee to its licensee is limited to the intellectual
  64  * property embodied in the software Licensee provides to its licensee, and
  65  * not to intellectual property embodied in modifications its licensee may
  66  * make.
  67  *
  68  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  69  * substantial portion of the Covered Code or modification must reproduce the
  70  * above Copyright Notice, and the following Disclaimer and Export Compliance
  71  * provision in the documentation and/or other materials provided with the
  72  * distribution.
  73  *
  74  * 3.4. Intel retains all right, title, and interest in and to the Original
  75  * Intel Code.
  76  *
  77  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  78  * Intel shall be used in advertising or otherwise to promote the sale, use or
  79  * other dealings in products derived from or relating to the Covered Code
  80  * without prior written authorization from Intel.
  81  *
  82  * 4. Disclaimer and Export Compliance
  83  *
  84  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  85  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  86  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  87  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  88  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  89  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  90  * PARTICULAR PURPOSE.
  91  *
  92  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  93  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  94  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  95  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  96  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  97  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  98  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  99  * LIMITED REMEDY.
 100  *
 101  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 102  * software or system incorporating such software without first obtaining any
 103  * required license or other approval from the U. S. Department of Commerce or
 104  * any other agency or department of the United States Government.  In the
 105  * event Licensee exports any such software from the United States or
 106  * re-exports any such software from a foreign destination, Licensee shall
 107  * ensure that the distribution and export/re-export of the software is in
 108  * compliance with all laws, regulations, orders, or other restrictions of the
 109  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 110  * any of its subsidiaries will export/re-export any technical data, process,
 111  * software, or service, directly or indirectly, to any country for which the
 112  * United States government or any agency thereof requires an export license,
 113  * other governmental approval, or letter of assurance, without first obtaining
 114  * such license, approval or letter.
 115  *
 116  *****************************************************************************/
 117
 118 #define __EXSTOREN_C__
 119
 120 #include "acpi.h"
 121 #include "accommon.h"
 122 #include "acinterp.h"
 123 #include "amlcode.h"
 124
 125
 126 #define _COMPONENT          ACPI_EXECUTER
 127         ACPI_MODULE_NAME    ("exstoren")
 128
 129
 130 /*******************************************************************************
 131  *
 132  * FUNCTION:    AcpiExResolveObject
 133  *
 134  * PARAMETERS:  SourceDescPtr       - Pointer to the source object
 135  *              TargetType          - Current type of the target
 136  *              WalkState           - Current walk state
 137  *
 138  * RETURN:      Status, resolved object in SourceDescPtr.
 139  *
 140  * DESCRIPTION: Resolve an object.  If the object is a reference, dereference
 141  *              it and return the actual object in the SourceDescPtr.
 142  *
 143  ******************************************************************************/
 144
 145 ACPI_STATUS
 146 AcpiExResolveObject (
 147     ACPI_OPERAND_OBJECT     **SourceDescPtr,
 148     ACPI_OBJECT_TYPE        TargetType,
 149     ACPI_WALK_STATE         *WalkState)
 150 {
 151     ACPI_OPERAND_OBJECT     *SourceDesc = *SourceDescPtr;
 152     ACPI_STATUS             Status = AE_OK;
 153
 154
 155     ACPI_FUNCTION_TRACE (ExResolveObject);
 156
 157
 158     /* Ensure we have a Target that can be stored to */
 159
 160     switch (TargetType)
 161     {
 162     case ACPI_TYPE_BUFFER_FIELD:
 163     case ACPI_TYPE_LOCAL_REGION_FIELD:
 164     case ACPI_TYPE_LOCAL_BANK_FIELD:
 165     case ACPI_TYPE_LOCAL_INDEX_FIELD:
 166         /*
 167          * These cases all require only Integers or values that
 168          * can be converted to Integers (Strings or Buffers)
 169          */
 170
 171     case ACPI_TYPE_INTEGER:
 172     case ACPI_TYPE_STRING:
 173     case ACPI_TYPE_BUFFER:
 174
 175         /*
 176          * Stores into a Field/Region or into a Integer/Buffer/String
 177          * are all essentially the same.  This case handles the
 178          * "interchangeable" types Integer, String, and Buffer.
 179          */
 180         if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)
 181         {
 182             /* Resolve a reference object first */
 183
 184             Status = AcpiExResolveToValue (SourceDescPtr, WalkState);
 185             if (ACPI_FAILURE (Status))
 186             {
 187                 break;
 188             }
 189         }
 190
 191         /* For CopyObject, no further validation necessary */
 192
 193         if (WalkState->Opcode == AML_COPY_OP)
 194         {
 195             break;
 196         }
 197
 198         /* Must have a Integer, Buffer, or String */
 199
 200         if ((SourceDesc->Common.Type != ACPI_TYPE_INTEGER)    &&
 201             (SourceDesc->Common.Type != ACPI_TYPE_BUFFER)     &&
 202             (SourceDesc->Common.Type != ACPI_TYPE_STRING)     &&
 203             !((SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 204                     (SourceDesc->Reference.Class== ACPI_REFCLASS_TABLE)))
 205         {
 206             /* Conversion successful but still not a valid type */
 207
 208             ACPI_ERROR ((AE_INFO,
 209                 "Cannot assign type %s to %s (must be type Int/Str/Buf)",
 210                 AcpiUtGetObjectTypeName (SourceDesc),
 211                 AcpiUtGetTypeName (TargetType)));
 212             Status = AE_AML_OPERAND_TYPE;
 213         }
 214         break;
 215
 216
 217     case ACPI_TYPE_LOCAL_ALIAS:
 218     case ACPI_TYPE_LOCAL_METHOD_ALIAS:
 219
 220         /*
 221          * All aliases should have been resolved earlier, during the
 222          * operand resolution phase.
 223          */
 224         ACPI_ERROR ((AE_INFO, "Store into an unresolved Alias object"));
 225         Status = AE_AML_INTERNAL;
 226         break;
 227
 228
 229     case ACPI_TYPE_PACKAGE:
 230     default:
 231
 232         /*
 233          * All other types than Alias and the various Fields come here,
 234          * including the untyped case - ACPI_TYPE_ANY.
 235          */
 236         break;
 237     }
 238
 239     return_ACPI_STATUS (Status);
 240 }
 241
 242
 243 /*******************************************************************************
 244  *
 245  * FUNCTION:    AcpiExStoreObjectToObject
 246  *
 247  * PARAMETERS:  SourceDesc          - Object to store
 248  *              DestDesc            - Object to receive a copy of the source
 249  *              NewDesc             - New object if DestDesc is obsoleted
 250  *              WalkState           - Current walk state
 251  *
 252  * RETURN:      Status
 253  *
 254  * DESCRIPTION: "Store" an object to another object.  This may include
 255  *              converting the source type to the target type (implicit
 256  *              conversion), and a copy of the value of the source to
 257  *              the target.
 258  *
 259  *              The Assignment of an object to another (not named) object
 260  *              is handled here.
 261  *              The Source passed in will replace the current value (if any)
 262  *              with the input value.
 263  *
 264  *              When storing into an object the data is converted to the
 265  *              target object type then stored in the object.  This means
 266  *              that the target object type (for an initialized target) will
 267  *              not be changed by a store operation.
 268  *
 269  *              This module allows destination types of Number, String,
 270  *              Buffer, and Package.
 271  *
 272  *              Assumes parameters are already validated.  NOTE: SourceDesc
 273  *              resolution (from a reference object) must be performed by
 274  *              the caller if necessary.
 275  *
 276  ******************************************************************************/
 277
 278 ACPI_STATUS
 279 AcpiExStoreObjectToObject (
 280     ACPI_OPERAND_OBJECT     *SourceDesc,
 281     ACPI_OPERAND_OBJECT     *DestDesc,
 282     ACPI_OPERAND_OBJECT     **NewDesc,
 283     ACPI_WALK_STATE         *WalkState)
 284 {
 285     ACPI_OPERAND_OBJECT     *ActualSrcDesc;
 286     ACPI_STATUS             Status = AE_OK;
 287
 288
 289     ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToObject, SourceDesc);
 290
 291
 292     ActualSrcDesc = SourceDesc;
 293     if (!DestDesc)
 294     {
 295         /*
 296          * There is no destination object (An uninitialized node or
 297          * package element), so we can simply copy the source object
 298          * creating a new destination object
 299          */
 300         Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, NewDesc, WalkState);
 301         return_ACPI_STATUS (Status);
 302     }
 303
 304     if (SourceDesc->Common.Type != DestDesc->Common.Type)
 305     {
 306         /*
 307          * The source type does not match the type of the destination.
 308          * Perform the "implicit conversion" of the source to the current type
 309          * of the target as per the ACPI specification.
 310          *
 311          * If no conversion performed, ActualSrcDesc = SourceDesc.
 312          * Otherwise, ActualSrcDesc is a temporary object to hold the
 313          * converted object.
 314          */
 315         Status = AcpiExConvertToTargetType (DestDesc->Common.Type,
 316                         SourceDesc, &ActualSrcDesc, WalkState);
 317         if (ACPI_FAILURE (Status))
 318         {
 319             return_ACPI_STATUS (Status);
 320         }
 321
 322         if (SourceDesc == ActualSrcDesc)
 323         {
 324             /*
 325              * No conversion was performed. Return the SourceDesc as the
 326              * new object.
 327              */
 328             *NewDesc = SourceDesc;
 329             return_ACPI_STATUS (AE_OK);
 330         }
 331     }
 332
 333     /*
 334      * We now have two objects of identical types, and we can perform a
 335      * copy of the *value* of the source object.
 336      */
 337     switch (DestDesc->Common.Type)
 338     {
 339     case ACPI_TYPE_INTEGER:
 340
 341         DestDesc->Integer.Value = ActualSrcDesc->Integer.Value;
 342
 343         /* Truncate value if we are executing from a 32-bit ACPI table */
 344
 345         AcpiExTruncateFor32bitTable (DestDesc);
 346         break;
 347
 348     case ACPI_TYPE_STRING:
 349
 350         Status = AcpiExStoreStringToString (ActualSrcDesc, DestDesc);
 351         break;
 352
 353     case ACPI_TYPE_BUFFER:
 354
 355         Status = AcpiExStoreBufferToBuffer (ActualSrcDesc, DestDesc);
 356         break;
 357
 358     case ACPI_TYPE_PACKAGE:
 359
 360         Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, &DestDesc,
 361                     WalkState);
 362         break;
 363
 364     default:
 365         /*
 366          * All other types come here.
 367          */
 368         ACPI_WARNING ((AE_INFO, "Store into type %s not implemented",
 369             AcpiUtGetObjectTypeName (DestDesc)));
 370
 371         Status = AE_NOT_IMPLEMENTED;
 372         break;
 373     }
 374
 375     if (ActualSrcDesc != SourceDesc)
 376     {
 377         /* Delete the intermediate (temporary) source object */
 378
 379         AcpiUtRemoveReference (ActualSrcDesc);
 380     }
 381
 382     *NewDesc = DestDesc;
 383     return_ACPI_STATUS (Status);
 384 }
 385
 386