| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: exresolv - AML Interpreter object resolution |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, Intel Corp. |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #include "acpi.h" |
| 45 | #include "accommon.h" |
| 46 | #include "amlcode.h" |
| 47 | #include "acdispat.h" |
| 48 | #include "acinterp.h" |
| 49 | #include "acnamesp.h" |
| 50 | |
| 51 | |
| 52 | #define _COMPONENT ACPI_EXECUTER |
| 53 | ACPI_MODULE_NAME ("exresolv" ) |
| 54 | |
| 55 | /* Local prototypes */ |
| 56 | |
| 57 | static ACPI_STATUS |
| 58 | AcpiExResolveObjectToValue ( |
| 59 | ACPI_OPERAND_OBJECT **StackPtr, |
| 60 | ACPI_WALK_STATE *WalkState); |
| 61 | |
| 62 | |
| 63 | /******************************************************************************* |
| 64 | * |
| 65 | * FUNCTION: AcpiExResolveToValue |
| 66 | * |
| 67 | * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can |
| 68 | * be either an (ACPI_OPERAND_OBJECT *) |
| 69 | * or an ACPI_HANDLE. |
| 70 | * WalkState - Current method state |
| 71 | * |
| 72 | * RETURN: Status |
| 73 | * |
| 74 | * DESCRIPTION: Convert Reference objects to values |
| 75 | * |
| 76 | ******************************************************************************/ |
| 77 | |
| 78 | ACPI_STATUS |
| 79 | AcpiExResolveToValue ( |
| 80 | ACPI_OPERAND_OBJECT **StackPtr, |
| 81 | ACPI_WALK_STATE *WalkState) |
| 82 | { |
| 83 | ACPI_STATUS Status; |
| 84 | |
| 85 | |
| 86 | ACPI_FUNCTION_TRACE_PTR (ExResolveToValue, StackPtr); |
| 87 | |
| 88 | |
| 89 | if (!StackPtr || !*StackPtr) |
| 90 | { |
| 91 | ACPI_ERROR ((AE_INFO, "Internal - null pointer" )); |
| 92 | return_ACPI_STATUS (AE_AML_NO_OPERAND); |
| 93 | } |
| 94 | |
| 95 | /* |
| 96 | * The entity pointed to by the StackPtr can be either |
| 97 | * 1) A valid ACPI_OPERAND_OBJECT, or |
| 98 | * 2) A ACPI_NAMESPACE_NODE (NamedObj) |
| 99 | */ |
| 100 | if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND) |
| 101 | { |
| 102 | Status = AcpiExResolveObjectToValue (StackPtr, WalkState); |
| 103 | if (ACPI_FAILURE (Status)) |
| 104 | { |
| 105 | return_ACPI_STATUS (Status); |
| 106 | } |
| 107 | |
| 108 | if (!*StackPtr) |
| 109 | { |
| 110 | ACPI_ERROR ((AE_INFO, "Internal - null pointer" )); |
| 111 | return_ACPI_STATUS (AE_AML_NO_OPERAND); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * Object on the stack may have changed if AcpiExResolveObjectToValue() |
| 117 | * was called (i.e., we can't use an _else_ here.) |
| 118 | */ |
| 119 | if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED) |
| 120 | { |
| 121 | Status = AcpiExResolveNodeToValue ( |
| 122 | ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr), |
| 123 | WalkState); |
| 124 | if (ACPI_FAILURE (Status)) |
| 125 | { |
| 126 | return_ACPI_STATUS (Status); |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n" , *StackPtr)); |
| 131 | return_ACPI_STATUS (AE_OK); |
| 132 | } |
| 133 | |
| 134 | |
| 135 | /******************************************************************************* |
| 136 | * |
| 137 | * FUNCTION: AcpiExResolveObjectToValue |
| 138 | * |
| 139 | * PARAMETERS: StackPtr - Pointer to an internal object |
| 140 | * WalkState - Current method state |
| 141 | * |
| 142 | * RETURN: Status |
| 143 | * |
| 144 | * DESCRIPTION: Retrieve the value from an internal object. The Reference type |
| 145 | * uses the associated AML opcode to determine the value. |
| 146 | * |
| 147 | ******************************************************************************/ |
| 148 | |
| 149 | static ACPI_STATUS |
| 150 | AcpiExResolveObjectToValue ( |
| 151 | ACPI_OPERAND_OBJECT **StackPtr, |
| 152 | ACPI_WALK_STATE *WalkState) |
| 153 | { |
| 154 | ACPI_STATUS Status = AE_OK; |
| 155 | ACPI_OPERAND_OBJECT *StackDesc; |
| 156 | ACPI_OPERAND_OBJECT *ObjDesc = NULL; |
| 157 | UINT8 RefType; |
| 158 | |
| 159 | |
| 160 | ACPI_FUNCTION_TRACE (ExResolveObjectToValue); |
| 161 | |
| 162 | |
| 163 | StackDesc = *StackPtr; |
| 164 | |
| 165 | /* This is an object of type ACPI_OPERAND_OBJECT */ |
| 166 | |
| 167 | switch (StackDesc->Common.Type) |
| 168 | { |
| 169 | case ACPI_TYPE_LOCAL_REFERENCE: |
| 170 | |
| 171 | RefType = StackDesc->Reference.Class; |
| 172 | |
| 173 | switch (RefType) |
| 174 | { |
| 175 | case ACPI_REFCLASS_LOCAL: |
| 176 | case ACPI_REFCLASS_ARG: |
| 177 | /* |
| 178 | * Get the local from the method's state info |
| 179 | * Note: this increments the local's object reference count |
| 180 | */ |
| 181 | Status = AcpiDsMethodDataGetValue (RefType, |
| 182 | StackDesc->Reference.Value, WalkState, &ObjDesc); |
| 183 | if (ACPI_FAILURE (Status)) |
| 184 | { |
| 185 | return_ACPI_STATUS (Status); |
| 186 | } |
| 187 | |
| 188 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] ValueObj is %p\n" , |
| 189 | StackDesc->Reference.Value, ObjDesc)); |
| 190 | |
| 191 | /* |
| 192 | * Now we can delete the original Reference Object and |
| 193 | * replace it with the resolved value |
| 194 | */ |
| 195 | AcpiUtRemoveReference (StackDesc); |
| 196 | *StackPtr = ObjDesc; |
| 197 | break; |
| 198 | |
| 199 | case ACPI_REFCLASS_INDEX: |
| 200 | |
| 201 | switch (StackDesc->Reference.TargetType) |
| 202 | { |
| 203 | case ACPI_TYPE_BUFFER_FIELD: |
| 204 | |
| 205 | /* Just return - do not dereference */ |
| 206 | break; |
| 207 | |
| 208 | case ACPI_TYPE_PACKAGE: |
| 209 | |
| 210 | /* If method call or CopyObject - do not dereference */ |
| 211 | |
| 212 | if ((WalkState->Opcode == AML_INT_METHODCALL_OP) || |
| 213 | (WalkState->Opcode == AML_COPY_OP)) |
| 214 | { |
| 215 | break; |
| 216 | } |
| 217 | |
| 218 | /* Otherwise, dereference the PackageIndex to a package element */ |
| 219 | |
| 220 | ObjDesc = *StackDesc->Reference.Where; |
| 221 | if (ObjDesc) |
| 222 | { |
| 223 | /* |
| 224 | * Valid object descriptor, copy pointer to return value |
| 225 | * (i.e., dereference the package index) |
| 226 | * Delete the ref object, increment the returned object |
| 227 | */ |
| 228 | AcpiUtAddReference (ObjDesc); |
| 229 | *StackPtr = ObjDesc; |
| 230 | } |
| 231 | else |
| 232 | { |
| 233 | /* |
| 234 | * A NULL object descriptor means an uninitialized element of |
| 235 | * the package, can't dereference it |
| 236 | */ |
| 237 | ACPI_ERROR ((AE_INFO, |
| 238 | "Attempt to dereference an Index to " |
| 239 | "NULL package element Idx=%p" , |
| 240 | StackDesc)); |
| 241 | Status = AE_AML_UNINITIALIZED_ELEMENT; |
| 242 | } |
| 243 | break; |
| 244 | |
| 245 | default: |
| 246 | |
| 247 | /* Invalid reference object */ |
| 248 | |
| 249 | ACPI_ERROR ((AE_INFO, |
| 250 | "Unknown TargetType 0x%X in Index/Reference object %p" , |
| 251 | StackDesc->Reference.TargetType, StackDesc)); |
| 252 | Status = AE_AML_INTERNAL; |
| 253 | break; |
| 254 | } |
| 255 | break; |
| 256 | |
| 257 | case ACPI_REFCLASS_REFOF: |
| 258 | case ACPI_REFCLASS_DEBUG: |
| 259 | case ACPI_REFCLASS_TABLE: |
| 260 | |
| 261 | /* Just leave the object as-is, do not dereference */ |
| 262 | |
| 263 | break; |
| 264 | |
| 265 | case ACPI_REFCLASS_NAME: /* Reference to a named object */ |
| 266 | |
| 267 | /* Dereference the name */ |
| 268 | |
| 269 | if ((StackDesc->Reference.Node->Type == ACPI_TYPE_DEVICE) || |
| 270 | (StackDesc->Reference.Node->Type == ACPI_TYPE_THERMAL)) |
| 271 | { |
| 272 | /* These node types do not have 'real' subobjects */ |
| 273 | |
| 274 | *StackPtr = (void *) StackDesc->Reference.Node; |
| 275 | } |
| 276 | else |
| 277 | { |
| 278 | /* Get the object pointed to by the namespace node */ |
| 279 | |
| 280 | *StackPtr = (StackDesc->Reference.Node)->Object; |
| 281 | AcpiUtAddReference (*StackPtr); |
| 282 | } |
| 283 | |
| 284 | AcpiUtRemoveReference (StackDesc); |
| 285 | break; |
| 286 | |
| 287 | default: |
| 288 | |
| 289 | ACPI_ERROR ((AE_INFO, |
| 290 | "Unknown Reference type 0x%X in %p" , |
| 291 | RefType, StackDesc)); |
| 292 | Status = AE_AML_INTERNAL; |
| 293 | break; |
| 294 | } |
| 295 | break; |
| 296 | |
| 297 | case ACPI_TYPE_BUFFER: |
| 298 | |
| 299 | Status = AcpiDsGetBufferArguments (StackDesc); |
| 300 | break; |
| 301 | |
| 302 | case ACPI_TYPE_PACKAGE: |
| 303 | |
| 304 | Status = AcpiDsGetPackageArguments (StackDesc); |
| 305 | break; |
| 306 | |
| 307 | case ACPI_TYPE_BUFFER_FIELD: |
| 308 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 309 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 310 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 311 | |
| 312 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| 313 | "FieldRead SourceDesc=%p Type=%X\n" , |
| 314 | StackDesc, StackDesc->Common.Type)); |
| 315 | |
| 316 | Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc); |
| 317 | |
| 318 | /* Remove a reference to the original operand, then override */ |
| 319 | |
| 320 | AcpiUtRemoveReference (*StackPtr); |
| 321 | *StackPtr = (void *) ObjDesc; |
| 322 | break; |
| 323 | |
| 324 | default: |
| 325 | |
| 326 | break; |
| 327 | } |
| 328 | |
| 329 | return_ACPI_STATUS (Status); |
| 330 | } |
| 331 | |
| 332 | |
| 333 | /******************************************************************************* |
| 334 | * |
| 335 | * FUNCTION: AcpiExResolveMultiple |
| 336 | * |
| 337 | * PARAMETERS: WalkState - Current state (contains AML opcode) |
| 338 | * Operand - Starting point for resolution |
| 339 | * ReturnType - Where the object type is returned |
| 340 | * ReturnDesc - Where the resolved object is returned |
| 341 | * |
| 342 | * RETURN: Status |
| 343 | * |
| 344 | * DESCRIPTION: Return the base object and type. Traverse a reference list if |
| 345 | * necessary to get to the base object. |
| 346 | * |
| 347 | ******************************************************************************/ |
| 348 | |
| 349 | ACPI_STATUS |
| 350 | AcpiExResolveMultiple ( |
| 351 | ACPI_WALK_STATE *WalkState, |
| 352 | ACPI_OPERAND_OBJECT *Operand, |
| 353 | ACPI_OBJECT_TYPE *ReturnType, |
| 354 | ACPI_OPERAND_OBJECT **ReturnDesc) |
| 355 | { |
| 356 | ACPI_OPERAND_OBJECT *ObjDesc = ACPI_CAST_PTR (void, Operand); |
| 357 | ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Operand); |
| 358 | ACPI_OBJECT_TYPE Type; |
| 359 | ACPI_STATUS Status; |
| 360 | |
| 361 | |
| 362 | ACPI_FUNCTION_TRACE (AcpiExResolveMultiple); |
| 363 | |
| 364 | |
| 365 | /* Operand can be either a namespace node or an operand descriptor */ |
| 366 | |
| 367 | switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc)) |
| 368 | { |
| 369 | case ACPI_DESC_TYPE_OPERAND: |
| 370 | |
| 371 | Type = ObjDesc->Common.Type; |
| 372 | break; |
| 373 | |
| 374 | case ACPI_DESC_TYPE_NAMED: |
| 375 | |
| 376 | Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type; |
| 377 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 378 | |
| 379 | /* If we had an Alias node, use the attached object for type info */ |
| 380 | |
| 381 | if (Type == ACPI_TYPE_LOCAL_ALIAS) |
| 382 | { |
| 383 | Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type; |
| 384 | ObjDesc = AcpiNsGetAttachedObject ( |
| 385 | (ACPI_NAMESPACE_NODE *) ObjDesc); |
| 386 | } |
| 387 | |
| 388 | if (!ObjDesc) |
| 389 | { |
| 390 | ACPI_ERROR ((AE_INFO, |
| 391 | "[%4.4s] Node is unresolved or uninitialized" , |
| 392 | AcpiUtGetNodeName (Node))); |
| 393 | return_ACPI_STATUS (AE_AML_UNINITIALIZED_NODE); |
| 394 | } |
| 395 | break; |
| 396 | |
| 397 | default: |
| 398 | return_ACPI_STATUS (AE_AML_OPERAND_TYPE); |
| 399 | } |
| 400 | |
| 401 | /* If type is anything other than a reference, we are done */ |
| 402 | |
| 403 | if (Type != ACPI_TYPE_LOCAL_REFERENCE) |
| 404 | { |
| 405 | goto Exit; |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * For reference objects created via the RefOf, Index, or Load/LoadTable |
| 410 | * operators, we need to get to the base object (as per the ACPI |
| 411 | * specification of the ObjectType and SizeOf operators). This means |
| 412 | * traversing the list of possibly many nested references. |
| 413 | */ |
| 414 | while (ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) |
| 415 | { |
| 416 | switch (ObjDesc->Reference.Class) |
| 417 | { |
| 418 | case ACPI_REFCLASS_REFOF: |
| 419 | case ACPI_REFCLASS_NAME: |
| 420 | |
| 421 | /* Dereference the reference pointer */ |
| 422 | |
| 423 | if (ObjDesc->Reference.Class == ACPI_REFCLASS_REFOF) |
| 424 | { |
| 425 | Node = ObjDesc->Reference.Object; |
| 426 | } |
| 427 | else /* AML_INT_NAMEPATH_OP */ |
| 428 | { |
| 429 | Node = ObjDesc->Reference.Node; |
| 430 | } |
| 431 | |
| 432 | /* All "References" point to a NS node */ |
| 433 | |
| 434 | if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) |
| 435 | { |
| 436 | ACPI_ERROR ((AE_INFO, |
| 437 | "Not a namespace node %p [%s]" , |
| 438 | Node, AcpiUtGetDescriptorName (Node))); |
| 439 | return_ACPI_STATUS (AE_AML_INTERNAL); |
| 440 | } |
| 441 | |
| 442 | /* Get the attached object */ |
| 443 | |
| 444 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 445 | if (!ObjDesc) |
| 446 | { |
| 447 | /* No object, use the NS node type */ |
| 448 | |
| 449 | Type = AcpiNsGetType (Node); |
| 450 | goto Exit; |
| 451 | } |
| 452 | |
| 453 | /* Check for circular references */ |
| 454 | |
| 455 | if (ObjDesc == Operand) |
| 456 | { |
| 457 | return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); |
| 458 | } |
| 459 | break; |
| 460 | |
| 461 | case ACPI_REFCLASS_INDEX: |
| 462 | |
| 463 | /* Get the type of this reference (index into another object) */ |
| 464 | |
| 465 | Type = ObjDesc->Reference.TargetType; |
| 466 | if (Type != ACPI_TYPE_PACKAGE) |
| 467 | { |
| 468 | goto Exit; |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * The main object is a package, we want to get the type |
| 473 | * of the individual package element that is referenced by |
| 474 | * the index. |
| 475 | * |
| 476 | * This could of course in turn be another reference object. |
| 477 | */ |
| 478 | ObjDesc = *(ObjDesc->Reference.Where); |
| 479 | if (!ObjDesc) |
| 480 | { |
| 481 | /* NULL package elements are allowed */ |
| 482 | |
| 483 | Type = 0; /* Uninitialized */ |
| 484 | goto Exit; |
| 485 | } |
| 486 | break; |
| 487 | |
| 488 | case ACPI_REFCLASS_TABLE: |
| 489 | |
| 490 | Type = ACPI_TYPE_DDB_HANDLE; |
| 491 | goto Exit; |
| 492 | |
| 493 | case ACPI_REFCLASS_LOCAL: |
| 494 | case ACPI_REFCLASS_ARG: |
| 495 | |
| 496 | if (ReturnDesc) |
| 497 | { |
| 498 | Status = AcpiDsMethodDataGetValue (ObjDesc->Reference.Class, |
| 499 | ObjDesc->Reference.Value, WalkState, &ObjDesc); |
| 500 | if (ACPI_FAILURE (Status)) |
| 501 | { |
| 502 | return_ACPI_STATUS (Status); |
| 503 | } |
| 504 | AcpiUtRemoveReference (ObjDesc); |
| 505 | } |
| 506 | else |
| 507 | { |
| 508 | Status = AcpiDsMethodDataGetNode (ObjDesc->Reference.Class, |
| 509 | ObjDesc->Reference.Value, WalkState, &Node); |
| 510 | if (ACPI_FAILURE (Status)) |
| 511 | { |
| 512 | return_ACPI_STATUS (Status); |
| 513 | } |
| 514 | |
| 515 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 516 | if (!ObjDesc) |
| 517 | { |
| 518 | Type = ACPI_TYPE_ANY; |
| 519 | goto Exit; |
| 520 | } |
| 521 | } |
| 522 | break; |
| 523 | |
| 524 | case ACPI_REFCLASS_DEBUG: |
| 525 | |
| 526 | /* The Debug Object is of type "DebugObject" */ |
| 527 | |
| 528 | Type = ACPI_TYPE_DEBUG_OBJECT; |
| 529 | goto Exit; |
| 530 | |
| 531 | default: |
| 532 | |
| 533 | ACPI_ERROR ((AE_INFO, |
| 534 | "Unknown Reference Class 0x%2.2X" , |
| 535 | ObjDesc->Reference.Class)); |
| 536 | return_ACPI_STATUS (AE_AML_INTERNAL); |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | /* |
| 541 | * Now we are guaranteed to have an object that has not been created |
| 542 | * via the RefOf or Index operators. |
| 543 | */ |
| 544 | Type = ObjDesc->Common.Type; |
| 545 | |
| 546 | |
| 547 | Exit: |
| 548 | /* Convert internal types to external types */ |
| 549 | |
| 550 | switch (Type) |
| 551 | { |
| 552 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 553 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 554 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 555 | |
| 556 | Type = ACPI_TYPE_FIELD_UNIT; |
| 557 | break; |
| 558 | |
| 559 | case ACPI_TYPE_LOCAL_SCOPE: |
| 560 | |
| 561 | /* Per ACPI Specification, Scope is untyped */ |
| 562 | |
| 563 | Type = ACPI_TYPE_ANY; |
| 564 | break; |
| 565 | |
| 566 | default: |
| 567 | |
| 568 | /* No change to Type required */ |
| 569 | |
| 570 | break; |
| 571 | } |
| 572 | |
| 573 | *ReturnType = Type; |
| 574 | if (ReturnDesc) |
| 575 | { |
| 576 | *ReturnDesc = ObjDesc; |
| 577 | } |
| 578 | return_ACPI_STATUS (AE_OK); |
| 579 | } |
| 580 | |