1
2/******************************************************************************
3 *
4 * Module Name: exresolv - AML Interpreter object resolution
5 * $Revision: 125 $
6 *
7 *****************************************************************************/
8
9/******************************************************************************
10 *
11 * 1. Copyright Notice
12 *
13 * Some or all of this work - Copyright (c) 1999 - 2004, 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 __EXRESOLV_C__
119
| 1
2/******************************************************************************
3 *
4 * Module Name: exresolv - AML Interpreter object resolution
5 * $Revision: 125 $
6 *
7 *****************************************************************************/
8
9/******************************************************************************
10 *
11 * 1. Copyright Notice
12 *
13 * Some or all of this work - Copyright (c) 1999 - 2004, 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 __EXRESOLV_C__
119
|
120#include "acpi.h"
121#include "amlcode.h"
122#include "acdispat.h"
123#include "acinterp.h"
124#include "acnamesp.h"
125#include "acparser.h"
| 120#include <contrib/dev/acpica/acpi.h>
121#include <contrib/dev/acpica/amlcode.h>
122#include <contrib/dev/acpica/acdispat.h>
123#include <contrib/dev/acpica/acinterp.h>
124#include <contrib/dev/acpica/acnamesp.h>
125#include <contrib/dev/acpica/acparser.h>
|
126
127
128#define _COMPONENT ACPI_EXECUTER
129 ACPI_MODULE_NAME ("exresolv")
130
131
132/*******************************************************************************
133 *
134 * FUNCTION: AcpiExResolveToValue
135 *
136 * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can
137 * be either an (ACPI_OPERAND_OBJECT *)
138 * or an ACPI_HANDLE.
139 * WalkState - Current method state
140 *
141 * RETURN: Status
142 *
143 * DESCRIPTION: Convert Reference objects to values
144 *
145 ******************************************************************************/
146
147ACPI_STATUS
148AcpiExResolveToValue (
149 ACPI_OPERAND_OBJECT **StackPtr,
150 ACPI_WALK_STATE *WalkState)
151{
152 ACPI_STATUS Status;
153
154
155 ACPI_FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr);
156
157
158 if (!StackPtr || !*StackPtr)
159 {
160 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n"));
161 return_ACPI_STATUS (AE_AML_NO_OPERAND);
162 }
163
164 /*
165 * The entity pointed to by the StackPtr can be either
166 * 1) A valid ACPI_OPERAND_OBJECT, or
167 * 2) A ACPI_NAMESPACE_NODE (NamedObj)
168 */
169 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND)
170 {
171 Status = AcpiExResolveObjectToValue (StackPtr, WalkState);
172 if (ACPI_FAILURE (Status))
173 {
174 return_ACPI_STATUS (Status);
175 }
176 }
177
178 /*
179 * Object on the stack may have changed if AcpiExResolveObjectToValue()
180 * was called (i.e., we can't use an _else_ here.)
181 */
182 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED)
183 {
184 Status = AcpiExResolveNodeToValue (
185 ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr),
186 WalkState);
187 if (ACPI_FAILURE (Status))
188 {
189 return_ACPI_STATUS (Status);
190 }
191 }
192
193 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr));
194 return_ACPI_STATUS (AE_OK);
195}
196
197
198/*******************************************************************************
199 *
200 * FUNCTION: AcpiExResolveObjectToValue
201 *
202 * PARAMETERS: StackPtr - Pointer to a stack location that contains a
203 * ptr to an internal object.
204 * WalkState - Current method state
205 *
206 * RETURN: Status
207 *
208 * DESCRIPTION: Retrieve the value from an internal object. The Reference type
209 * uses the associated AML opcode to determine the value.
210 *
211 ******************************************************************************/
212
213ACPI_STATUS
214AcpiExResolveObjectToValue (
215 ACPI_OPERAND_OBJECT **StackPtr,
216 ACPI_WALK_STATE *WalkState)
217{
218 ACPI_STATUS Status = AE_OK;
219 ACPI_OPERAND_OBJECT *StackDesc;
220 void *TempNode;
221 ACPI_OPERAND_OBJECT *ObjDesc;
222 UINT16 Opcode;
223
224
225 ACPI_FUNCTION_TRACE ("ExResolveObjectToValue");
226
227
228 StackDesc = *StackPtr;
229
230 /* This is an ACPI_OPERAND_OBJECT */
231
232 switch (ACPI_GET_OBJECT_TYPE (StackDesc))
233 {
234 case ACPI_TYPE_LOCAL_REFERENCE:
235
236 Opcode = StackDesc->Reference.Opcode;
237
238 switch (Opcode)
239 {
240 case AML_NAME_OP:
241
242 /*
243 * Convert indirect name ptr to a direct name ptr.
244 * Then, AcpiExResolveNodeToValue can be used to get the value
245 */
246 TempNode = StackDesc->Reference.Object;
247
248 /* Delete the Reference Object */
249
250 AcpiUtRemoveReference (StackDesc);
251
252 /* Put direct name pointer onto stack and exit */
253
254 (*StackPtr) = TempNode;
255 break;
256
257
258 case AML_LOCAL_OP:
259 case AML_ARG_OP:
260
261 /*
262 * Get the local from the method's state info
263 * Note: this increments the local's object reference count
264 */
265 Status = AcpiDsMethodDataGetValue (Opcode,
266 StackDesc->Reference.Offset, WalkState, &ObjDesc);
267 if (ACPI_FAILURE (Status))
268 {
269 return_ACPI_STATUS (Status);
270 }
271
272 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] ValueObj is %p\n",
273 StackDesc->Reference.Offset, ObjDesc));
274
275 /*
276 * Now we can delete the original Reference Object and
277 * replace it with the resolved value
278 */
279 AcpiUtRemoveReference (StackDesc);
280 *StackPtr = ObjDesc;
281 break;
282
283
284 case AML_INDEX_OP:
285
286 switch (StackDesc->Reference.TargetType)
287 {
288 case ACPI_TYPE_BUFFER_FIELD:
289
290 /* Just return - leave the Reference on the stack */
291 break;
292
293
294 case ACPI_TYPE_PACKAGE:
295
296 ObjDesc = *StackDesc->Reference.Where;
297 if (ObjDesc)
298 {
299 /*
300 * Valid obj descriptor, copy pointer to return value
301 * (i.e., dereference the package index)
302 * Delete the ref object, increment the returned object
303 */
304 AcpiUtRemoveReference (StackDesc);
305 AcpiUtAddReference (ObjDesc);
306 *StackPtr = ObjDesc;
307 }
308 else
309 {
310 /*
311 * A NULL object descriptor means an unitialized element of
312 * the package, can't dereference it
313 */
314 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
315 "Attempt to deref an Index to NULL pkg element Idx=%p\n",
316 StackDesc));
317 Status = AE_AML_UNINITIALIZED_ELEMENT;
318 }
319 break;
320
321
322 default:
323
324 /* Invalid reference object */
325
326 ACPI_REPORT_ERROR ((
327 "During resolve, Unknown TargetType %X in Index/Reference obj %p\n",
328 StackDesc->Reference.TargetType, StackDesc));
329 Status = AE_AML_INTERNAL;
330 break;
331 }
332 break;
333
334
335 case AML_REF_OF_OP:
336 case AML_DEBUG_OP:
337 case AML_LOAD_OP:
338
339 /* Just leave the object as-is */
340
341 break;
342
343
344 default:
345
346 ACPI_REPORT_ERROR (("During resolve, Unknown Reference opcode %X (%s) in %p\n",
347 Opcode, AcpiPsGetOpcodeName (Opcode), StackDesc));
348 Status = AE_AML_INTERNAL;
349 break;
350 }
351 break;
352
353
354 case ACPI_TYPE_BUFFER:
355
356 Status = AcpiDsGetBufferArguments (StackDesc);
357 break;
358
359
360 case ACPI_TYPE_PACKAGE:
361
362 Status = AcpiDsGetPackageArguments (StackDesc);
363 break;
364
365
366 /*
367 * These cases may never happen here, but just in case..
368 */
369 case ACPI_TYPE_BUFFER_FIELD:
370 case ACPI_TYPE_LOCAL_REGION_FIELD:
371 case ACPI_TYPE_LOCAL_BANK_FIELD:
372 case ACPI_TYPE_LOCAL_INDEX_FIELD:
373
374 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n",
375 StackDesc, ACPI_GET_OBJECT_TYPE (StackDesc)));
376
377 Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc);
378 *StackPtr = (void *) ObjDesc;
379 break;
380
381 default:
382 break;
383 }
384
385 return_ACPI_STATUS (Status);
386}
387
388
389/*******************************************************************************
390 *
391 * FUNCTION: AcpiExResolveMultiple
392 *
393 * PARAMETERS: WalkState - Current state (contains AML opcode)
394 * Operand - Starting point for resolution
395 * ReturnType - Where the object type is returned
396 * ReturnDesc - Where the resolved object is returned
397 *
398 * RETURN: Status
399 *
400 * DESCRIPTION: Return the base object and type. Traverse a reference list if
401 * necessary to get to the base object.
402 *
403 ******************************************************************************/
404
405ACPI_STATUS
406AcpiExResolveMultiple (
407 ACPI_WALK_STATE *WalkState,
408 ACPI_OPERAND_OBJECT *Operand,
409 ACPI_OBJECT_TYPE *ReturnType,
410 ACPI_OPERAND_OBJECT **ReturnDesc)
411{
412 ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand;
413 ACPI_NAMESPACE_NODE *Node;
414 ACPI_OBJECT_TYPE Type;
415 ACPI_STATUS Status;
416
417
418 ACPI_FUNCTION_TRACE ("AcpiExResolveMultiple");
419
420
421
422 /*
423 * Operand can be either a namespace node or an operand descriptor
424 */
425 switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
426 {
427 case ACPI_DESC_TYPE_OPERAND:
428 Type = ObjDesc->Common.Type;
429 break;
430
431 case ACPI_DESC_TYPE_NAMED:
432 Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
433 ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
434
435 /* If we had an Alias node, use the attached object for type info */
436
437 if (Type == ACPI_TYPE_LOCAL_ALIAS)
438 {
439 Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
440 ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
441 }
442 break;
443
444 default:
445 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
446 }
447
448
449 /*
450 * If type is anything other than a reference, we are done
451 */
452 if (Type != ACPI_TYPE_LOCAL_REFERENCE)
453 {
454 goto Exit;
455 }
456
457 /*
458 * For reference objects created via the RefOf or Index operators,
459 * we need to get to the base object (as per the ACPI specification
460 * of the ObjectType and SizeOf operators). This means traversing
461 * the list of possibly many nested references.
462 */
463 while (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_LOCAL_REFERENCE)
464 {
465 switch (ObjDesc->Reference.Opcode)
466 {
467 case AML_REF_OF_OP:
468
469 /* Dereference the reference pointer */
470
471 Node = ObjDesc->Reference.Object;
472
473 /* All "References" point to a NS node */
474
475 if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
476 {
477 ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Not a NS node %p [%s]\n",
478 Node, AcpiUtGetDescriptorName (Node)));
479 return_ACPI_STATUS (AE_AML_INTERNAL);
480 }
481
482 /* Get the attached object */
483
484 ObjDesc = AcpiNsGetAttachedObject (Node);
485 if (!ObjDesc)
486 {
487 /* No object, use the NS node type */
488
489 Type = AcpiNsGetType (Node);
490 goto Exit;
491 }
492
493 /* Check for circular references */
494
495 if (ObjDesc == Operand)
496 {
497 return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
498 }
499 break;
500
501
502 case AML_INDEX_OP:
503
504 /* Get the type of this reference (index into another object) */
505
506 Type = ObjDesc->Reference.TargetType;
507 if (Type != ACPI_TYPE_PACKAGE)
508 {
509 goto Exit;
510 }
511
512 /*
513 * The main object is a package, we want to get the type
514 * of the individual package element that is referenced by
515 * the index.
516 *
517 * This could of course in turn be another reference object.
518 */
519 ObjDesc = *(ObjDesc->Reference.Where);
520 break;
521
522
523 case AML_INT_NAMEPATH_OP:
524
525 /* Dereference the reference pointer */
526
527 Node = ObjDesc->Reference.Node;
528
529 /* All "References" point to a NS node */
530
531 if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
532 {
533 ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Not a NS node %p [%s]\n",
534 Node, AcpiUtGetDescriptorName (Node)));
535 return_ACPI_STATUS (AE_AML_INTERNAL);
536 }
537
538 /* Get the attached object */
539
540 ObjDesc = AcpiNsGetAttachedObject (Node);
541 if (!ObjDesc)
542 {
543 /* No object, use the NS node type */
544
545 Type = AcpiNsGetType (Node);
546 goto Exit;
547 }
548
549 /* Check for circular references */
550
551 if (ObjDesc == Operand)
552 {
553 return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
554 }
555 break;
556
557
558 case AML_LOCAL_OP:
559 case AML_ARG_OP:
560
561 if (ReturnDesc)
562 {
563 Status = AcpiDsMethodDataGetValue (ObjDesc->Reference.Opcode,
564 ObjDesc->Reference.Offset, WalkState, &ObjDesc);
565 if (ACPI_FAILURE (Status))
566 {
567 return_ACPI_STATUS (Status);
568 }
569 AcpiUtRemoveReference (ObjDesc);
570 }
571 else
572 {
573 Status = AcpiDsMethodDataGetNode (ObjDesc->Reference.Opcode,
574 ObjDesc->Reference.Offset, WalkState, &Node);
575 if (ACPI_FAILURE (Status))
576 {
577 return_ACPI_STATUS (Status);
578 }
579
580 ObjDesc = AcpiNsGetAttachedObject (Node);
581 if (!ObjDesc)
582 {
583 Type = ACPI_TYPE_ANY;
584 goto Exit;
585 }
586 }
587 break;
588
589
590 case AML_DEBUG_OP:
591
592 /* The Debug Object is of type "DebugObject" */
593
594 Type = ACPI_TYPE_DEBUG_OBJECT;
595 goto Exit;
596
597
598 default:
599
600 ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Unknown Reference subtype %X\n",
601 ObjDesc->Reference.Opcode));
602 return_ACPI_STATUS (AE_AML_INTERNAL);
603 }
604 }
605
606 /*
607 * Now we are guaranteed to have an object that has not been created
608 * via the RefOf or Index operators.
609 */
610 Type = ACPI_GET_OBJECT_TYPE (ObjDesc);
611
612
613Exit:
614 /* Convert internal types to external types */
615
616 switch (Type)
617 {
618 case ACPI_TYPE_LOCAL_REGION_FIELD:
619 case ACPI_TYPE_LOCAL_BANK_FIELD:
620 case ACPI_TYPE_LOCAL_INDEX_FIELD:
621
622 Type = ACPI_TYPE_FIELD_UNIT;
623 break;
624
625 case ACPI_TYPE_LOCAL_SCOPE:
626
627 /* Per ACPI Specification, Scope is untyped */
628
629 Type = ACPI_TYPE_ANY;
630 break;
631
632 default:
633 /* No change to Type required */
634 break;
635 }
636
637 *ReturnType = Type;
638 if (ReturnDesc)
639 {
640 *ReturnDesc = ObjDesc;
641 }
642 return_ACPI_STATUS (AE_OK);
643}
644
645
| 126
127
128#define _COMPONENT ACPI_EXECUTER
129 ACPI_MODULE_NAME ("exresolv")
130
131
132/*******************************************************************************
133 *
134 * FUNCTION: AcpiExResolveToValue
135 *
136 * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can
137 * be either an (ACPI_OPERAND_OBJECT *)
138 * or an ACPI_HANDLE.
139 * WalkState - Current method state
140 *
141 * RETURN: Status
142 *
143 * DESCRIPTION: Convert Reference objects to values
144 *
145 ******************************************************************************/
146
147ACPI_STATUS
148AcpiExResolveToValue (
149 ACPI_OPERAND_OBJECT **StackPtr,
150 ACPI_WALK_STATE *WalkState)
151{
152 ACPI_STATUS Status;
153
154
155 ACPI_FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr);
156
157
158 if (!StackPtr || !*StackPtr)
159 {
160 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n"));
161 return_ACPI_STATUS (AE_AML_NO_OPERAND);
162 }
163
164 /*
165 * The entity pointed to by the StackPtr can be either
166 * 1) A valid ACPI_OPERAND_OBJECT, or
167 * 2) A ACPI_NAMESPACE_NODE (NamedObj)
168 */
169 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_OPERAND)
170 {
171 Status = AcpiExResolveObjectToValue (StackPtr, WalkState);
172 if (ACPI_FAILURE (Status))
173 {
174 return_ACPI_STATUS (Status);
175 }
176 }
177
178 /*
179 * Object on the stack may have changed if AcpiExResolveObjectToValue()
180 * was called (i.e., we can't use an _else_ here.)
181 */
182 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED)
183 {
184 Status = AcpiExResolveNodeToValue (
185 ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, StackPtr),
186 WalkState);
187 if (ACPI_FAILURE (Status))
188 {
189 return_ACPI_STATUS (Status);
190 }
191 }
192
193 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Resolved object %p\n", *StackPtr));
194 return_ACPI_STATUS (AE_OK);
195}
196
197
198/*******************************************************************************
199 *
200 * FUNCTION: AcpiExResolveObjectToValue
201 *
202 * PARAMETERS: StackPtr - Pointer to a stack location that contains a
203 * ptr to an internal object.
204 * WalkState - Current method state
205 *
206 * RETURN: Status
207 *
208 * DESCRIPTION: Retrieve the value from an internal object. The Reference type
209 * uses the associated AML opcode to determine the value.
210 *
211 ******************************************************************************/
212
213ACPI_STATUS
214AcpiExResolveObjectToValue (
215 ACPI_OPERAND_OBJECT **StackPtr,
216 ACPI_WALK_STATE *WalkState)
217{
218 ACPI_STATUS Status = AE_OK;
219 ACPI_OPERAND_OBJECT *StackDesc;
220 void *TempNode;
221 ACPI_OPERAND_OBJECT *ObjDesc;
222 UINT16 Opcode;
223
224
225 ACPI_FUNCTION_TRACE ("ExResolveObjectToValue");
226
227
228 StackDesc = *StackPtr;
229
230 /* This is an ACPI_OPERAND_OBJECT */
231
232 switch (ACPI_GET_OBJECT_TYPE (StackDesc))
233 {
234 case ACPI_TYPE_LOCAL_REFERENCE:
235
236 Opcode = StackDesc->Reference.Opcode;
237
238 switch (Opcode)
239 {
240 case AML_NAME_OP:
241
242 /*
243 * Convert indirect name ptr to a direct name ptr.
244 * Then, AcpiExResolveNodeToValue can be used to get the value
245 */
246 TempNode = StackDesc->Reference.Object;
247
248 /* Delete the Reference Object */
249
250 AcpiUtRemoveReference (StackDesc);
251
252 /* Put direct name pointer onto stack and exit */
253
254 (*StackPtr) = TempNode;
255 break;
256
257
258 case AML_LOCAL_OP:
259 case AML_ARG_OP:
260
261 /*
262 * Get the local from the method's state info
263 * Note: this increments the local's object reference count
264 */
265 Status = AcpiDsMethodDataGetValue (Opcode,
266 StackDesc->Reference.Offset, WalkState, &ObjDesc);
267 if (ACPI_FAILURE (Status))
268 {
269 return_ACPI_STATUS (Status);
270 }
271
272 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Arg/Local %X] ValueObj is %p\n",
273 StackDesc->Reference.Offset, ObjDesc));
274
275 /*
276 * Now we can delete the original Reference Object and
277 * replace it with the resolved value
278 */
279 AcpiUtRemoveReference (StackDesc);
280 *StackPtr = ObjDesc;
281 break;
282
283
284 case AML_INDEX_OP:
285
286 switch (StackDesc->Reference.TargetType)
287 {
288 case ACPI_TYPE_BUFFER_FIELD:
289
290 /* Just return - leave the Reference on the stack */
291 break;
292
293
294 case ACPI_TYPE_PACKAGE:
295
296 ObjDesc = *StackDesc->Reference.Where;
297 if (ObjDesc)
298 {
299 /*
300 * Valid obj descriptor, copy pointer to return value
301 * (i.e., dereference the package index)
302 * Delete the ref object, increment the returned object
303 */
304 AcpiUtRemoveReference (StackDesc);
305 AcpiUtAddReference (ObjDesc);
306 *StackPtr = ObjDesc;
307 }
308 else
309 {
310 /*
311 * A NULL object descriptor means an unitialized element of
312 * the package, can't dereference it
313 */
314 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
315 "Attempt to deref an Index to NULL pkg element Idx=%p\n",
316 StackDesc));
317 Status = AE_AML_UNINITIALIZED_ELEMENT;
318 }
319 break;
320
321
322 default:
323
324 /* Invalid reference object */
325
326 ACPI_REPORT_ERROR ((
327 "During resolve, Unknown TargetType %X in Index/Reference obj %p\n",
328 StackDesc->Reference.TargetType, StackDesc));
329 Status = AE_AML_INTERNAL;
330 break;
331 }
332 break;
333
334
335 case AML_REF_OF_OP:
336 case AML_DEBUG_OP:
337 case AML_LOAD_OP:
338
339 /* Just leave the object as-is */
340
341 break;
342
343
344 default:
345
346 ACPI_REPORT_ERROR (("During resolve, Unknown Reference opcode %X (%s) in %p\n",
347 Opcode, AcpiPsGetOpcodeName (Opcode), StackDesc));
348 Status = AE_AML_INTERNAL;
349 break;
350 }
351 break;
352
353
354 case ACPI_TYPE_BUFFER:
355
356 Status = AcpiDsGetBufferArguments (StackDesc);
357 break;
358
359
360 case ACPI_TYPE_PACKAGE:
361
362 Status = AcpiDsGetPackageArguments (StackDesc);
363 break;
364
365
366 /*
367 * These cases may never happen here, but just in case..
368 */
369 case ACPI_TYPE_BUFFER_FIELD:
370 case ACPI_TYPE_LOCAL_REGION_FIELD:
371 case ACPI_TYPE_LOCAL_BANK_FIELD:
372 case ACPI_TYPE_LOCAL_INDEX_FIELD:
373
374 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n",
375 StackDesc, ACPI_GET_OBJECT_TYPE (StackDesc)));
376
377 Status = AcpiExReadDataFromField (WalkState, StackDesc, &ObjDesc);
378 *StackPtr = (void *) ObjDesc;
379 break;
380
381 default:
382 break;
383 }
384
385 return_ACPI_STATUS (Status);
386}
387
388
389/*******************************************************************************
390 *
391 * FUNCTION: AcpiExResolveMultiple
392 *
393 * PARAMETERS: WalkState - Current state (contains AML opcode)
394 * Operand - Starting point for resolution
395 * ReturnType - Where the object type is returned
396 * ReturnDesc - Where the resolved object is returned
397 *
398 * RETURN: Status
399 *
400 * DESCRIPTION: Return the base object and type. Traverse a reference list if
401 * necessary to get to the base object.
402 *
403 ******************************************************************************/
404
405ACPI_STATUS
406AcpiExResolveMultiple (
407 ACPI_WALK_STATE *WalkState,
408 ACPI_OPERAND_OBJECT *Operand,
409 ACPI_OBJECT_TYPE *ReturnType,
410 ACPI_OPERAND_OBJECT **ReturnDesc)
411{
412 ACPI_OPERAND_OBJECT *ObjDesc = (void *) Operand;
413 ACPI_NAMESPACE_NODE *Node;
414 ACPI_OBJECT_TYPE Type;
415 ACPI_STATUS Status;
416
417
418 ACPI_FUNCTION_TRACE ("AcpiExResolveMultiple");
419
420
421
422 /*
423 * Operand can be either a namespace node or an operand descriptor
424 */
425 switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
426 {
427 case ACPI_DESC_TYPE_OPERAND:
428 Type = ObjDesc->Common.Type;
429 break;
430
431 case ACPI_DESC_TYPE_NAMED:
432 Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
433 ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
434
435 /* If we had an Alias node, use the attached object for type info */
436
437 if (Type == ACPI_TYPE_LOCAL_ALIAS)
438 {
439 Type = ((ACPI_NAMESPACE_NODE *) ObjDesc)->Type;
440 ObjDesc = AcpiNsGetAttachedObject ((ACPI_NAMESPACE_NODE *) ObjDesc);
441 }
442 break;
443
444 default:
445 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
446 }
447
448
449 /*
450 * If type is anything other than a reference, we are done
451 */
452 if (Type != ACPI_TYPE_LOCAL_REFERENCE)
453 {
454 goto Exit;
455 }
456
457 /*
458 * For reference objects created via the RefOf or Index operators,
459 * we need to get to the base object (as per the ACPI specification
460 * of the ObjectType and SizeOf operators). This means traversing
461 * the list of possibly many nested references.
462 */
463 while (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_LOCAL_REFERENCE)
464 {
465 switch (ObjDesc->Reference.Opcode)
466 {
467 case AML_REF_OF_OP:
468
469 /* Dereference the reference pointer */
470
471 Node = ObjDesc->Reference.Object;
472
473 /* All "References" point to a NS node */
474
475 if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
476 {
477 ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Not a NS node %p [%s]\n",
478 Node, AcpiUtGetDescriptorName (Node)));
479 return_ACPI_STATUS (AE_AML_INTERNAL);
480 }
481
482 /* Get the attached object */
483
484 ObjDesc = AcpiNsGetAttachedObject (Node);
485 if (!ObjDesc)
486 {
487 /* No object, use the NS node type */
488
489 Type = AcpiNsGetType (Node);
490 goto Exit;
491 }
492
493 /* Check for circular references */
494
495 if (ObjDesc == Operand)
496 {
497 return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
498 }
499 break;
500
501
502 case AML_INDEX_OP:
503
504 /* Get the type of this reference (index into another object) */
505
506 Type = ObjDesc->Reference.TargetType;
507 if (Type != ACPI_TYPE_PACKAGE)
508 {
509 goto Exit;
510 }
511
512 /*
513 * The main object is a package, we want to get the type
514 * of the individual package element that is referenced by
515 * the index.
516 *
517 * This could of course in turn be another reference object.
518 */
519 ObjDesc = *(ObjDesc->Reference.Where);
520 break;
521
522
523 case AML_INT_NAMEPATH_OP:
524
525 /* Dereference the reference pointer */
526
527 Node = ObjDesc->Reference.Node;
528
529 /* All "References" point to a NS node */
530
531 if (ACPI_GET_DESCRIPTOR_TYPE (Node) != ACPI_DESC_TYPE_NAMED)
532 {
533 ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Not a NS node %p [%s]\n",
534 Node, AcpiUtGetDescriptorName (Node)));
535 return_ACPI_STATUS (AE_AML_INTERNAL);
536 }
537
538 /* Get the attached object */
539
540 ObjDesc = AcpiNsGetAttachedObject (Node);
541 if (!ObjDesc)
542 {
543 /* No object, use the NS node type */
544
545 Type = AcpiNsGetType (Node);
546 goto Exit;
547 }
548
549 /* Check for circular references */
550
551 if (ObjDesc == Operand)
552 {
553 return_ACPI_STATUS (AE_AML_CIRCULAR_REFERENCE);
554 }
555 break;
556
557
558 case AML_LOCAL_OP:
559 case AML_ARG_OP:
560
561 if (ReturnDesc)
562 {
563 Status = AcpiDsMethodDataGetValue (ObjDesc->Reference.Opcode,
564 ObjDesc->Reference.Offset, WalkState, &ObjDesc);
565 if (ACPI_FAILURE (Status))
566 {
567 return_ACPI_STATUS (Status);
568 }
569 AcpiUtRemoveReference (ObjDesc);
570 }
571 else
572 {
573 Status = AcpiDsMethodDataGetNode (ObjDesc->Reference.Opcode,
574 ObjDesc->Reference.Offset, WalkState, &Node);
575 if (ACPI_FAILURE (Status))
576 {
577 return_ACPI_STATUS (Status);
578 }
579
580 ObjDesc = AcpiNsGetAttachedObject (Node);
581 if (!ObjDesc)
582 {
583 Type = ACPI_TYPE_ANY;
584 goto Exit;
585 }
586 }
587 break;
588
589
590 case AML_DEBUG_OP:
591
592 /* The Debug Object is of type "DebugObject" */
593
594 Type = ACPI_TYPE_DEBUG_OBJECT;
595 goto Exit;
596
597
598 default:
599
600 ACPI_REPORT_ERROR (("AcpiExResolveMultiple: Unknown Reference subtype %X\n",
601 ObjDesc->Reference.Opcode));
602 return_ACPI_STATUS (AE_AML_INTERNAL);
603 }
604 }
605
606 /*
607 * Now we are guaranteed to have an object that has not been created
608 * via the RefOf or Index operators.
609 */
610 Type = ACPI_GET_OBJECT_TYPE (ObjDesc);
611
612
613Exit:
614 /* Convert internal types to external types */
615
616 switch (Type)
617 {
618 case ACPI_TYPE_LOCAL_REGION_FIELD:
619 case ACPI_TYPE_LOCAL_BANK_FIELD:
620 case ACPI_TYPE_LOCAL_INDEX_FIELD:
621
622 Type = ACPI_TYPE_FIELD_UNIT;
623 break;
624
625 case ACPI_TYPE_LOCAL_SCOPE:
626
627 /* Per ACPI Specification, Scope is untyped */
628
629 Type = ACPI_TYPE_ANY;
630 break;
631
632 default:
633 /* No change to Type required */
634 break;
635 }
636
637 *ReturnType = Type;
638 if (ReturnDesc)
639 {
640 *ReturnDesc = ObjDesc;
641 }
642 return_ACPI_STATUS (AE_OK);
643}
644
645
|