1 /****************************************************************************** 2 * 3 * Module Name: exresolv - AML Interpreter object resolution 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2023, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include <contrib/dev/acpica/include/acpi.h> 153 #include <contrib/dev/acpica/include/accommon.h> 154 #include <contrib/dev/acpica/include/amlcode.h> 155 #include <contrib/dev/acpica/include/acdispat.h> 156 #include <contrib/dev/acpica/include/acinterp.h> 157 #include <contrib/dev/acpica/include/acnamesp.h> 158 159 160 #define _COMPONENT ACPI_EXECUTER 161 ACPI_MODULE_NAME ("exresolv") 162 163 /* Local prototypes */ 164 165 static ACPI_STATUS 166 AcpiExResolveObjectToValue ( 167 ACPI_OPERAND_OBJECT **StackPtr, 168 ACPI_WALK_STATE *WalkState); 169 170 171 /******************************************************************************* 172 * 173 * FUNCTION: AcpiExResolveToValue 174 * 175 * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can 176 * be either an (ACPI_OPERAND_OBJECT *) 177 * or an ACPI_HANDLE. 178 * WalkState - Current method state 179 * 180 * RETURN: Status 181 * 182 * DESCRIPTION: Convert Reference objects to values 183 * 184 ******************************************************************************/ 185 186 ACPI_STATUS 187 AcpiExResolveToValue ( 188 ACPI_OPERAND_OBJECT **StackPtr, 189 ACPI_WALK_STATE *WalkState) 190 { 191 ACPI_STATUS Status; 192 193 194 ACPI_FUNCTION_TRACE_PTR (ExResolveToValue, StackPtr); 195 196 197 if (!StackPtr || !*StackPtr) 198 { 199 ACPI_ERROR ((AE_INFO, "Internal - null pointer")); 200 return_ACPI_STATUS (AE_AML_NO_OPERAND); 201 } 202 203 /* 204 * The entity pointed to by the StackPtr can be either 205 * 1) A valid ACPI_OPERAND_OBJECT, or 206 * 2) A ACPI_NAMESPACE_NODE (NamedObj) 207 */ 208 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND) 209 { 210 Status = AcpiExResolveObjectToValue (StackPtr, WalkState); 211 if (ACPI_FAILURE (Status)) 212 { 213 return_ACPI_STATUS (Status); 214 } 215 216 if (!*StackPtr) 217 { 218 ACPI_ERROR ((AE_INFO, "Internal - null pointer")); 219 return_ACPI_STATUS (AE_AML_NO_OPERAND); 220 } 221 } 222 223 /* 224 * Object on the stack may have changed if AcpiExResolveObjectToValue() 225 * was called (i.e., we can't use an _else_ here.) 226 */ 227 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED) 228 { 229 Status = AcpiExResolveNodeToValue ( 230 ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr), 231 WalkState); 232 if (ACPI_FAILURE (Status)) 233 { 234 return_ACPI_STATUS (Status); 235 } 236 } 237 238 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr)); 239 return_ACPI_STATUS (AE_OK); 240 } 241 242 243 /******************************************************************************* 244 * 245 * FUNCTION: AcpiExResolveObjectToValue 246 * 247 * PARAMETERS: StackPtr - Pointer to an internal object 248 * WalkState - Current method state 249 * 250 * RETURN: Status 251 * 252 * DESCRIPTION: Retrieve the value from an internal object. The Reference type 253 * uses the associated AML opcode to determine the value. 254 * 255 ******************************************************************************/ 256 257 static ACPI_STATUS 258 AcpiExResolveObjectToValue ( 259 ACPI_OPERAND_OBJECT **StackPtr, 260 ACPI_WALK_STATE *WalkState) 261 { 262 ACPI_STATUS Status = AE_OK; 263 ACPI_OPERAND_OBJECT *StackDesc; 264 ACPI_OPERAND_OBJECT *ObjDesc = NULL; 265 UINT8 RefType; 266 267 268 ACPI_FUNCTION_TRACE (ExResolveObjectToValue); 269 270 271 StackDesc = *StackPtr; 272 273 /* This is an object of type ACPI_OPERAND_OBJECT */ 274 275 switch (StackDesc->Common.Type) 276 { 277 case ACPI_TYPE_LOCAL_REFERENCE: 278 279 RefType = StackDesc->Reference.Class; 280 281 switch (RefType) 282 { 283 case ACPI_REFCLASS_LOCAL: 284 case ACPI_REFCLASS_ARG: 285 /* 286 * Get the local from the method's state info 287 * Note: this increments the local's object reference count 288 */ 289 Status = AcpiDsMethodDataGetValue (RefType, 290 StackDesc->Reference.Value, WalkState, &ObjDesc); 291 if (ACPI_FAILURE (Status)) 292 { 293 return_ACPI_STATUS (Status); 294 } 295 296 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] ValueObj is %p\n", 297 StackDesc->Reference.Value, ObjDesc)); 298 299 /* 300 * Now we can delete the original Reference Object and 301 * replace it with the resolved value 302 */ 303 AcpiUtRemoveReference (StackDesc); 304 *StackPtr = ObjDesc; 305 break; 306 307 case ACPI_REFCLASS_INDEX: 308 309 switch (StackDesc->Reference.TargetType) 310 { 311 case ACPI_TYPE_BUFFER_FIELD: 312 313 /* Just return - do not dereference */ 314 break; 315 316 case ACPI_TYPE_PACKAGE: 317 318 /* If method call or CopyObject - do not dereference */ 319 320 if ((WalkState->Opcode == AML_INT_METHODCALL_OP) || 321 (WalkState->Opcode == AML_COPY_OBJECT_OP)) 322 { 323 break; 324 } 325 326 /* Otherwise, dereference the PackageIndex to a package element */ 327 328 ObjDesc = *StackDesc->Reference.Where; 329 if (ObjDesc) 330 { 331 /* 332 * Valid object descriptor, copy pointer to return value 333 * (i.e., dereference the package index) 334 * Delete the ref object, increment the returned object 335 */ 336 AcpiUtAddReference (ObjDesc); 337 *StackPtr = ObjDesc; 338 } 339 else 340 { 341 /* 342 * A NULL object descriptor means an uninitialized element of 343 * the package, can't dereference it 344 */ 345 ACPI_ERROR ((AE_INFO, 346 "Attempt to dereference an Index to " 347 "NULL package element Idx=%p", 348 StackDesc)); 349 Status = AE_AML_UNINITIALIZED_ELEMENT; 350 } 351 break; 352 353 default: 354 355 /* Invalid reference object */ 356 357 ACPI_ERROR ((AE_INFO, 358 "Unknown TargetType 0x%X in Index/Reference object %p", 359 StackDesc->Reference.TargetType, StackDesc)); 360 Status = AE_AML_INTERNAL; 361 break; 362 } 363 break; 364 365 case ACPI_REFCLASS_REFOF: 366 case ACPI_REFCLASS_DEBUG: 367 case ACPI_REFCLASS_TABLE: 368 369 /* Just leave the object as-is, do not dereference */ 370 371 break; 372 373 case ACPI_REFCLASS_NAME: /* Reference to a named object */ 374 375 /* Dereference the name */ 376 377 if ((StackDesc->Reference.Node->Type == ACPI_TYPE_DEVICE) || 378 (StackDesc->Reference.Node->Type == ACPI_TYPE_THERMAL)) 379 { 380 /* These node types do not have 'real' subobjects */ 381 382 *StackPtr = (void *) StackDesc->Reference.Node; 383 } 384 else 385 { 386 /* Get the object pointed to by the namespace node */ 387 388 *StackPtr = (StackDesc->Reference.Node)->Object; 389 AcpiUtAddReference (*StackPtr); 390 } 391 392 AcpiUtRemoveReference (StackDesc); 393 break; 394 395 default: 396 397 ACPI_ERROR ((AE_INFO, 398 "Unknown Reference type 0x%X in %p", 399 RefType, StackDesc)); 400 Status = AE_AML_INTERNAL; 401 break; 402 } 403 break; 404 405 case ACPI_TYPE_BUFFER: 406 407 Status = AcpiDsGetBufferArguments (StackDesc); 408 break; 409 410 case ACPI_TYPE_PACKAGE: 411 412 Status = AcpiDsGetPackageArguments (StackDesc); 413 break; 414 415 case ACPI_TYPE_BUFFER_FIELD: 416 case ACPI_TYPE_LOCAL_REGION_FIELD: 417 case ACPI_TYPE_LOCAL_BANK_FIELD: 418 case ACPI_TYPE_LOCAL_INDEX_FIELD: 419 420 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 421 "FieldRead SourceDesc=%p Type=%X\n", 422 StackDesc, StackDesc->Common.Type)); 423 424 Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc); 425 426 /* Remove a reference to the original operand, then override */ 427 428 AcpiUtRemoveReference (*StackPtr); 429 *StackPtr = (void *) ObjDesc; 430 break; 431 432 default: 433 434 break; 435 } 436 437 return_ACPI_STATUS (Status); 438 } 439 440 441 /******************************************************************************* 442 * 443 * FUNCTION: AcpiExResolveMultiple 444 * 445 * PARAMETERS: WalkState - Current state (contains AML opcode) 446 * Operand - Starting point for resolution 447 * ReturnType - Where the object type is returned 448 * ReturnDesc - Where the resolved object is returned 449 * 450 * RETURN: Status 451 * 452 * DESCRIPTION: Return the base object and type. Traverse a reference list if 453 * necessary to get to the base object. 454 * 455 ******************************************************************************/ 456 457 ACPI_STATUS 458 AcpiExResolveMultiple ( 459 ACPI_WALK_STATE *WalkState, 460 ACPI_OPERAND_OBJECT *Operand, 461 ACPI_OBJECT_TYPE *ReturnType, 462 ACPI_OPERAND_OBJECT **ReturnDesc) 463 { 464 ACPI_OPERAND_OBJECT *ObjDesc = ACPI_CAST_PTR (void, Operand); 465 ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Operand); 466 ACPI_OBJECT_TYPE Type; 467 ACPI_STATUS Status; 468 469 470 ACPI_FUNCTION_TRACE (AcpiExResolveMultiple); 471 472 473 /* Operand can be either a namespace node or an operand descriptor */ 474 475 switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc)) 476 { 477 case ACPI_DESC_TYPE_OPERAND: 478 479 Type = ObjDesc->Common.Type; 480 break; 481 482 case ACPI_DESC_TYPE_NAMED: 483 484 Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type; 485 ObjDesc = AcpiNsGetAttachedObject (Node); 486 487 /* If we had an Alias node, use the attached object for type info */ 488 489 if (Type == ACPI_TYPE_LOCAL_ALIAS) 490 { 491 Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type; 492 ObjDesc = AcpiNsGetAttachedObject ( 493 (ACPI_NAMESPACE_NODE *) ObjDesc); 494 } 495 496 switch (Type) 497 { 498 case ACPI_TYPE_DEVICE: 499 case ACPI_TYPE_THERMAL: 500 501 /* These types have no attached subobject */ 502 break; 503 504 default: 505 506 /* All other types require a subobject */ 507 508 if (!ObjDesc) 509 { 510 ACPI_ERROR ((AE_INFO, 511 "[%4.4s] Node is unresolved or uninitialized", 512 AcpiUtGetNodeName (Node))); 513 return_ACPI_STATUS (AE_AML_UNINITIALIZED_NODE); 514 } 515 break; 516 } 517 break; 518 519 default: 520 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 521 } 522 523 /* If type is anything other than a reference, we are done */ 524 525 if (Type != ACPI_TYPE_LOCAL_REFERENCE) 526 { 527 goto Exit; 528 } 529 530 /* 531 * For reference objects created via the RefOf, Index, or Load/LoadTable 532 * operators, we need to get to the base object (as per the ACPI 533 * specification of the ObjectType and SizeOf operators). This means 534 * traversing the list of possibly many nested references. 535 */ 536 while (ObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) 537 { 538 switch (ObjDesc->Reference.Class) 539 { 540 case ACPI_REFCLASS_REFOF: 541 case ACPI_REFCLASS_NAME: 542 543 /* Dereference the reference pointer */ 544 545 if (ObjDesc->Reference.Class == ACPI_REFCLASS_REFOF) 546 { 547 Node = ObjDesc->Reference.Object; 548 } 549 else /* AML_INT_NAMEPATH_OP */ 550 { 551 Node = ObjDesc->Reference.Node; 552 } 553 554 /* All "References" point to a NS node */ 555 556 if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED) 557 { 558 ACPI_ERROR ((AE_INFO, 559 "Not a namespace node %p [%s]", 560 Node, AcpiUtGetDescriptorName (Node))); 561 return_ACPI_STATUS (AE_AML_INTERNAL); 562 } 563 564 /* Get the attached object */ 565 566 ObjDesc = AcpiNsGetAttachedObject (Node); 567 if (!ObjDesc) 568 { 569 /* No object, use the NS node type */ 570 571 Type = AcpiNsGetType (Node); 572 goto Exit; 573 } 574 575 /* Check for circular references */ 576 577 if (ObjDesc == Operand) 578 { 579 return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE); 580 } 581 break; 582 583 case ACPI_REFCLASS_INDEX: 584 585 /* Get the type of this reference (index into another object) */ 586 587 Type = ObjDesc->Reference.TargetType; 588 if (Type != ACPI_TYPE_PACKAGE) 589 { 590 goto Exit; 591 } 592 593 /* 594 * The main object is a package, we want to get the type 595 * of the individual package element that is referenced by 596 * the index. 597 * 598 * This could of course in turn be another reference object. 599 */ 600 ObjDesc = *(ObjDesc->Reference.Where); 601 if (!ObjDesc) 602 { 603 /* NULL package elements are allowed */ 604 605 Type = 0; /* Uninitialized */ 606 goto Exit; 607 } 608 break; 609 610 case ACPI_REFCLASS_TABLE: 611 612 Type = ACPI_TYPE_DDB_HANDLE; 613 goto Exit; 614 615 case ACPI_REFCLASS_LOCAL: 616 case ACPI_REFCLASS_ARG: 617 618 if (ReturnDesc) 619 { 620 Status = AcpiDsMethodDataGetValue (ObjDesc->Reference.Class, 621 ObjDesc->Reference.Value, WalkState, &ObjDesc); 622 if (ACPI_FAILURE (Status)) 623 { 624 return_ACPI_STATUS (Status); 625 } 626 AcpiUtRemoveReference (ObjDesc); 627 } 628 else 629 { 630 Status = AcpiDsMethodDataGetNode (ObjDesc->Reference.Class, 631 ObjDesc->Reference.Value, WalkState, &Node); 632 if (ACPI_FAILURE (Status)) 633 { 634 return_ACPI_STATUS (Status); 635 } 636 637 ObjDesc = AcpiNsGetAttachedObject (Node); 638 if (!ObjDesc) 639 { 640 Type = ACPI_TYPE_ANY; 641 goto Exit; 642 } 643 } 644 break; 645 646 case ACPI_REFCLASS_DEBUG: 647 648 /* The Debug Object is of type "DebugObject" */ 649 650 Type = ACPI_TYPE_DEBUG_OBJECT; 651 goto Exit; 652 653 default: 654 655 ACPI_ERROR ((AE_INFO, 656 "Unknown Reference Class 0x%2.2X", 657 ObjDesc->Reference.Class)); 658 return_ACPI_STATUS (AE_AML_INTERNAL); 659 } 660 } 661 662 /* 663 * Now we are guaranteed to have an object that has not been created 664 * via the RefOf or Index operators. 665 */ 666 Type = ObjDesc->Common.Type; 667 668 669 Exit: 670 /* Convert internal types to external types */ 671 672 switch (Type) 673 { 674 case ACPI_TYPE_LOCAL_REGION_FIELD: 675 case ACPI_TYPE_LOCAL_BANK_FIELD: 676 case ACPI_TYPE_LOCAL_INDEX_FIELD: 677 678 Type = ACPI_TYPE_FIELD_UNIT; 679 break; 680 681 case ACPI_TYPE_LOCAL_SCOPE: 682 683 /* Per ACPI Specification, Scope is untyped */ 684 685 Type = ACPI_TYPE_ANY; 686 break; 687 688 default: 689 690 /* No change to Type required */ 691 692 break; 693 } 694 695 *ReturnType = Type; 696 if (ReturnDesc) 697 { 698 *ReturnDesc = ObjDesc; 699 } 700 return_ACPI_STATUS (AE_OK); 701 } 702