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 - 2018, 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 "acpi.h"
153 #include "accommon.h"
154 #include "amlcode.h"
155 #include "acdispat.h"
156 #include "acinterp.h"
157 #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
AcpiExResolveToValue(ACPI_OPERAND_OBJECT ** StackPtr,ACPI_WALK_STATE * WalkState)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
AcpiExResolveObjectToValue(ACPI_OPERAND_OBJECT ** StackPtr,ACPI_WALK_STATE * WalkState)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
AcpiExResolveMultiple(ACPI_WALK_STATE * WalkState,ACPI_OPERAND_OBJECT * Operand,ACPI_OBJECT_TYPE * ReturnType,ACPI_OPERAND_OBJECT ** ReturnDesc)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