1 /******************************************************************************
2 *
3 * Module Name: exoparg1 - AML execution - opcodes with 1 argument
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, 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 "acparser.h"
47 #include "acdispat.h"
48 #include "acinterp.h"
49 #include "amlcode.h"
50 #include "acnamesp.h"
51
52
53 #define _COMPONENT ACPI_EXECUTER
54 ACPI_MODULE_NAME ("exoparg1")
55
56
57 /*!
58 * Naming convention for AML interpreter execution routines.
59 *
60 * The routines that begin execution of AML opcodes are named with a common
61 * convention based upon the number of arguments, the number of target operands,
62 * and whether or not a value is returned:
63 *
64 * AcpiExOpcode_xA_yT_zR
65 *
66 * Where:
67 *
68 * xA - ARGUMENTS: The number of arguments (input operands) that are
69 * required for this opcode type (0 through 6 args).
70 * yT - TARGETS: The number of targets (output operands) that are required
71 * for this opcode type (0, 1, or 2 targets).
72 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
73 * as the function return (0 or 1).
74 *
75 * The AcpiExOpcode* functions are called via the Dispatcher component with
76 * fully resolved operands.
77 !*/
78
79 /*******************************************************************************
80 *
81 * FUNCTION: AcpiExOpcode_0A_0T_1R
82 *
83 * PARAMETERS: WalkState - Current state (contains AML opcode)
84 *
85 * RETURN: Status
86 *
87 * DESCRIPTION: Execute operator with no operands, one return value
88 *
89 ******************************************************************************/
90
91 ACPI_STATUS
AcpiExOpcode_0A_0T_1R(ACPI_WALK_STATE * WalkState)92 AcpiExOpcode_0A_0T_1R (
93 ACPI_WALK_STATE *WalkState)
94 {
95 ACPI_STATUS Status = AE_OK;
96 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
97
98
99 ACPI_FUNCTION_TRACE_STR (ExOpcode_0A_0T_1R,
100 AcpiPsGetOpcodeName (WalkState->Opcode));
101
102
103 /* Examine the AML opcode */
104
105 switch (WalkState->Opcode)
106 {
107 case AML_TIMER_OP: /* Timer () */
108
109 /* Create a return object of type Integer */
110
111 ReturnDesc = AcpiUtCreateIntegerObject (AcpiOsGetTimer ());
112 if (!ReturnDesc)
113 {
114 Status = AE_NO_MEMORY;
115 goto Cleanup;
116 }
117 break;
118
119 default: /* Unknown opcode */
120
121 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
122 WalkState->Opcode));
123 Status = AE_AML_BAD_OPCODE;
124 break;
125 }
126
127 Cleanup:
128
129 /* Delete return object on error */
130
131 if ((ACPI_FAILURE (Status)) || WalkState->ResultObj)
132 {
133 AcpiUtRemoveReference (ReturnDesc);
134 WalkState->ResultObj = NULL;
135 }
136 else
137 {
138 /* Save the return value */
139
140 WalkState->ResultObj = ReturnDesc;
141 }
142
143 return_ACPI_STATUS (Status);
144 }
145
146
147 /*******************************************************************************
148 *
149 * FUNCTION: AcpiExOpcode_1A_0T_0R
150 *
151 * PARAMETERS: WalkState - Current state (contains AML opcode)
152 *
153 * RETURN: Status
154 *
155 * DESCRIPTION: Execute Type 1 monadic operator with numeric operand on
156 * object stack
157 *
158 ******************************************************************************/
159
160 ACPI_STATUS
AcpiExOpcode_1A_0T_0R(ACPI_WALK_STATE * WalkState)161 AcpiExOpcode_1A_0T_0R (
162 ACPI_WALK_STATE *WalkState)
163 {
164 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
165 ACPI_STATUS Status = AE_OK;
166
167
168 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_0R,
169 AcpiPsGetOpcodeName (WalkState->Opcode));
170
171
172 /* Examine the AML opcode */
173
174 switch (WalkState->Opcode)
175 {
176 case AML_RELEASE_OP: /* Release (MutexObject) */
177
178 Status = AcpiExReleaseMutex (Operand[0], WalkState);
179 break;
180
181 case AML_RESET_OP: /* Reset (EventObject) */
182
183 Status = AcpiExSystemResetEvent (Operand[0]);
184 break;
185
186 case AML_SIGNAL_OP: /* Signal (EventObject) */
187
188 Status = AcpiExSystemSignalEvent (Operand[0]);
189 break;
190
191 case AML_SLEEP_OP: /* Sleep (MsecTime) */
192
193 Status = AcpiExSystemDoSleep (Operand[0]->Integer.Value);
194 break;
195
196 case AML_STALL_OP: /* Stall (UsecTime) */
197
198 Status = AcpiExSystemDoStall ((UINT32) Operand[0]->Integer.Value);
199 break;
200
201 case AML_UNLOAD_OP: /* Unload (Handle) */
202
203 Status = AcpiExUnloadTable (Operand[0]);
204 break;
205
206 default: /* Unknown opcode */
207
208 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
209 WalkState->Opcode));
210 Status = AE_AML_BAD_OPCODE;
211 break;
212 }
213
214 return_ACPI_STATUS (Status);
215 }
216
217
218 /*******************************************************************************
219 *
220 * FUNCTION: AcpiExOpcode_1A_1T_0R
221 *
222 * PARAMETERS: WalkState - Current state (contains AML opcode)
223 *
224 * RETURN: Status
225 *
226 * DESCRIPTION: Execute opcode with one argument, one target, and no
227 * return value.
228 *
229 ******************************************************************************/
230
231 ACPI_STATUS
AcpiExOpcode_1A_1T_0R(ACPI_WALK_STATE * WalkState)232 AcpiExOpcode_1A_1T_0R (
233 ACPI_WALK_STATE *WalkState)
234 {
235 ACPI_STATUS Status = AE_OK;
236 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
237
238
239 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_0R,
240 AcpiPsGetOpcodeName (WalkState->Opcode));
241
242
243 /* Examine the AML opcode */
244
245 switch (WalkState->Opcode)
246 {
247 case AML_LOAD_OP:
248
249 Status = AcpiExLoadOp (Operand[0], Operand[1], WalkState);
250 break;
251
252 default: /* Unknown opcode */
253
254 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
255 WalkState->Opcode));
256 Status = AE_AML_BAD_OPCODE;
257 goto Cleanup;
258 }
259
260
261 Cleanup:
262
263 return_ACPI_STATUS (Status);
264 }
265
266
267 /*******************************************************************************
268 *
269 * FUNCTION: AcpiExOpcode_1A_1T_1R
270 *
271 * PARAMETERS: WalkState - Current state (contains AML opcode)
272 *
273 * RETURN: Status
274 *
275 * DESCRIPTION: Execute opcode with one argument, one target, and a
276 * return value.
277 *
278 ******************************************************************************/
279
280 ACPI_STATUS
AcpiExOpcode_1A_1T_1R(ACPI_WALK_STATE * WalkState)281 AcpiExOpcode_1A_1T_1R (
282 ACPI_WALK_STATE *WalkState)
283 {
284 ACPI_STATUS Status = AE_OK;
285 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
286 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
287 ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL;
288 UINT32 Temp32;
289 UINT32 i;
290 UINT64 PowerOfTen;
291 UINT64 Digit;
292
293
294 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_1R,
295 AcpiPsGetOpcodeName (WalkState->Opcode));
296
297
298 /* Examine the AML opcode */
299
300 switch (WalkState->Opcode)
301 {
302 case AML_BIT_NOT_OP:
303 case AML_FIND_SET_LEFT_BIT_OP:
304 case AML_FIND_SET_RIGHT_BIT_OP:
305 case AML_FROM_BCD_OP:
306 case AML_TO_BCD_OP:
307 case AML_COND_REF_OF_OP:
308
309 /* Create a return object of type Integer for these opcodes */
310
311 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
312 if (!ReturnDesc)
313 {
314 Status = AE_NO_MEMORY;
315 goto Cleanup;
316 }
317
318 switch (WalkState->Opcode)
319 {
320 case AML_BIT_NOT_OP: /* Not (Operand, Result) */
321
322 ReturnDesc->Integer.Value = ~Operand[0]->Integer.Value;
323 break;
324
325 case AML_FIND_SET_LEFT_BIT_OP: /* FindSetLeftBit (Operand, Result) */
326
327 ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
328
329 /*
330 * Acpi specification describes Integer type as a little
331 * endian unsigned value, so this boundary condition is valid.
332 */
333 for (Temp32 = 0; ReturnDesc->Integer.Value &&
334 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
335 {
336 ReturnDesc->Integer.Value >>= 1;
337 }
338
339 ReturnDesc->Integer.Value = Temp32;
340 break;
341
342 case AML_FIND_SET_RIGHT_BIT_OP: /* FindSetRightBit (Operand, Result) */
343
344 ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
345
346 /*
347 * The Acpi specification describes Integer type as a little
348 * endian unsigned value, so this boundary condition is valid.
349 */
350 for (Temp32 = 0; ReturnDesc->Integer.Value &&
351 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
352 {
353 ReturnDesc->Integer.Value <<= 1;
354 }
355
356 /* Since the bit position is one-based, subtract from 33 (65) */
357
358 ReturnDesc->Integer.Value =
359 Temp32 == 0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - Temp32;
360 break;
361
362 case AML_FROM_BCD_OP: /* FromBcd (BCDValue, Result) */
363 /*
364 * The 64-bit ACPI integer can hold 16 4-bit BCD characters
365 * (if table is 32-bit, integer can hold 8 BCD characters)
366 * Convert each 4-bit BCD value
367 */
368 PowerOfTen = 1;
369 ReturnDesc->Integer.Value = 0;
370 Digit = Operand[0]->Integer.Value;
371
372 /* Convert each BCD digit (each is one nybble wide) */
373
374 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
375 {
376 /* Get the least significant 4-bit BCD digit */
377
378 Temp32 = ((UINT32) Digit) & 0xF;
379
380 /* Check the range of the digit */
381
382 if (Temp32 > 9)
383 {
384 ACPI_ERROR ((AE_INFO,
385 "BCD digit too large (not decimal): 0x%X",
386 Temp32));
387
388 Status = AE_AML_NUMERIC_OVERFLOW;
389 goto Cleanup;
390 }
391
392 /* Sum the digit into the result with the current power of 10 */
393
394 ReturnDesc->Integer.Value +=
395 (((UINT64) Temp32) * PowerOfTen);
396
397 /* Shift to next BCD digit */
398
399 Digit >>= 4;
400
401 /* Next power of 10 */
402
403 PowerOfTen *= 10;
404 }
405 break;
406
407 case AML_TO_BCD_OP: /* ToBcd (Operand, Result) */
408
409 ReturnDesc->Integer.Value = 0;
410 Digit = Operand[0]->Integer.Value;
411
412 /* Each BCD digit is one nybble wide */
413
414 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
415 {
416 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Temp32);
417
418 /*
419 * Insert the BCD digit that resides in the
420 * remainder from above
421 */
422 ReturnDesc->Integer.Value |=
423 (((UINT64) Temp32) << ACPI_MUL_4 (i));
424 }
425
426 /* Overflow if there is any data left in Digit */
427
428 if (Digit > 0)
429 {
430 ACPI_ERROR ((AE_INFO,
431 "Integer too large to convert to BCD: 0x%8.8X%8.8X",
432 ACPI_FORMAT_UINT64 (Operand[0]->Integer.Value)));
433 Status = AE_AML_NUMERIC_OVERFLOW;
434 goto Cleanup;
435 }
436 break;
437
438 case AML_COND_REF_OF_OP: /* CondRefOf (SourceObject, Result) */
439 /*
440 * This op is a little strange because the internal return value is
441 * different than the return value stored in the result descriptor
442 * (There are really two return values)
443 */
444 if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode)
445 {
446 /*
447 * This means that the object does not exist in the namespace,
448 * return FALSE
449 */
450 ReturnDesc->Integer.Value = 0;
451 goto Cleanup;
452 }
453
454 /* Get the object reference, store it, and remove our reference */
455
456 Status = AcpiExGetObjectReference (Operand[0],
457 &ReturnDesc2, WalkState);
458 if (ACPI_FAILURE (Status))
459 {
460 goto Cleanup;
461 }
462
463 Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState);
464 AcpiUtRemoveReference (ReturnDesc2);
465
466 /* The object exists in the namespace, return TRUE */
467
468 ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
469 goto Cleanup;
470
471
472 default:
473
474 /* No other opcodes get here */
475
476 break;
477 }
478 break;
479
480 case AML_STORE_OP: /* Store (Source, Target) */
481 /*
482 * A store operand is typically a number, string, buffer or lvalue
483 * Be careful about deleting the source object,
484 * since the object itself may have been stored.
485 */
486 Status = AcpiExStore (Operand[0], Operand[1], WalkState);
487 if (ACPI_FAILURE (Status))
488 {
489 return_ACPI_STATUS (Status);
490 }
491
492 /* It is possible that the Store already produced a return object */
493
494 if (!WalkState->ResultObj)
495 {
496 /*
497 * Normally, we would remove a reference on the Operand[0]
498 * parameter; But since it is being used as the internal return
499 * object (meaning we would normally increment it), the two
500 * cancel out, and we simply don't do anything.
501 */
502 WalkState->ResultObj = Operand[0];
503 WalkState->Operands[0] = NULL; /* Prevent deletion */
504 }
505 return_ACPI_STATUS (Status);
506
507 /*
508 * ACPI 2.0 Opcodes
509 */
510 case AML_COPY_OP: /* Copy (Source, Target) */
511
512 Status = AcpiUtCopyIobjectToIobject (Operand[0], &ReturnDesc,
513 WalkState);
514 break;
515
516 case AML_TO_DECSTRING_OP: /* ToDecimalString (Data, Result) */
517
518 Status = AcpiExConvertToString (Operand[0], &ReturnDesc,
519 ACPI_EXPLICIT_CONVERT_DECIMAL);
520 if (ReturnDesc == Operand[0])
521 {
522 /* No conversion performed, add ref to handle return value */
523 AcpiUtAddReference (ReturnDesc);
524 }
525 break;
526
527 case AML_TO_HEXSTRING_OP: /* ToHexString (Data, Result) */
528
529 Status = AcpiExConvertToString (Operand[0], &ReturnDesc,
530 ACPI_EXPLICIT_CONVERT_HEX);
531 if (ReturnDesc == Operand[0])
532 {
533 /* No conversion performed, add ref to handle return value */
534 AcpiUtAddReference (ReturnDesc);
535 }
536 break;
537
538 case AML_TO_BUFFER_OP: /* ToBuffer (Data, Result) */
539
540 Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc);
541 if (ReturnDesc == Operand[0])
542 {
543 /* No conversion performed, add ref to handle return value */
544 AcpiUtAddReference (ReturnDesc);
545 }
546 break;
547
548 case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */
549
550 Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc,
551 ACPI_ANY_BASE);
552 if (ReturnDesc == Operand[0])
553 {
554 /* No conversion performed, add ref to handle return value */
555 AcpiUtAddReference (ReturnDesc);
556 }
557 break;
558
559 case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */
560 case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */
561
562 /* These are two obsolete opcodes */
563
564 ACPI_ERROR ((AE_INFO,
565 "%s is obsolete and not implemented",
566 AcpiPsGetOpcodeName (WalkState->Opcode)));
567 Status = AE_SUPPORT;
568 goto Cleanup;
569
570 default: /* Unknown opcode */
571
572 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
573 WalkState->Opcode));
574 Status = AE_AML_BAD_OPCODE;
575 goto Cleanup;
576 }
577
578 if (ACPI_SUCCESS (Status))
579 {
580 /* Store the return value computed above into the target object */
581
582 Status = AcpiExStore (ReturnDesc, Operand[1], WalkState);
583 }
584
585
586 Cleanup:
587
588 /* Delete return object on error */
589
590 if (ACPI_FAILURE (Status))
591 {
592 AcpiUtRemoveReference (ReturnDesc);
593 }
594
595 /* Save return object on success */
596
597 else if (!WalkState->ResultObj)
598 {
599 WalkState->ResultObj = ReturnDesc;
600 }
601
602 return_ACPI_STATUS (Status);
603 }
604
605
606 /*******************************************************************************
607 *
608 * FUNCTION: AcpiExOpcode_1A_0T_1R
609 *
610 * PARAMETERS: WalkState - Current state (contains AML opcode)
611 *
612 * RETURN: Status
613 *
614 * DESCRIPTION: Execute opcode with one argument, no target, and a return value
615 *
616 ******************************************************************************/
617
618 ACPI_STATUS
AcpiExOpcode_1A_0T_1R(ACPI_WALK_STATE * WalkState)619 AcpiExOpcode_1A_0T_1R (
620 ACPI_WALK_STATE *WalkState)
621 {
622 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
623 ACPI_OPERAND_OBJECT *TempDesc;
624 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
625 ACPI_STATUS Status = AE_OK;
626 UINT32 Type;
627 UINT64 Value;
628
629
630 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R,
631 AcpiPsGetOpcodeName (WalkState->Opcode));
632
633
634 /* Examine the AML opcode */
635
636 switch (WalkState->Opcode)
637 {
638 case AML_LNOT_OP: /* LNot (Operand) */
639
640 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0);
641 if (!ReturnDesc)
642 {
643 Status = AE_NO_MEMORY;
644 goto Cleanup;
645 }
646
647 /*
648 * Set result to ONES (TRUE) if Value == 0. Note:
649 * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above.
650 */
651 if (!Operand[0]->Integer.Value)
652 {
653 ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
654 }
655 break;
656
657 case AML_DECREMENT_OP: /* Decrement (Operand) */
658 case AML_INCREMENT_OP: /* Increment (Operand) */
659 /*
660 * Create a new integer. Can't just get the base integer and
661 * increment it because it may be an Arg or Field.
662 */
663 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
664 if (!ReturnDesc)
665 {
666 Status = AE_NO_MEMORY;
667 goto Cleanup;
668 }
669
670 /*
671 * Since we are expecting a Reference operand, it can be either a
672 * NS Node or an internal object.
673 */
674 TempDesc = Operand[0];
675 if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND)
676 {
677 /* Internal reference object - prevent deletion */
678
679 AcpiUtAddReference (TempDesc);
680 }
681
682 /*
683 * Convert the Reference operand to an Integer (This removes a
684 * reference on the Operand[0] object)
685 *
686 * NOTE: We use LNOT_OP here in order to force resolution of the
687 * reference operand to an actual integer.
688 */
689 Status = AcpiExResolveOperands (AML_LNOT_OP, &TempDesc, WalkState);
690 if (ACPI_FAILURE (Status))
691 {
692 ACPI_EXCEPTION ((AE_INFO, Status,
693 "While resolving operands for [%s]",
694 AcpiPsGetOpcodeName (WalkState->Opcode)));
695
696 goto Cleanup;
697 }
698
699 /*
700 * TempDesc is now guaranteed to be an Integer object --
701 * Perform the actual increment or decrement
702 */
703 if (WalkState->Opcode == AML_INCREMENT_OP)
704 {
705 ReturnDesc->Integer.Value = TempDesc->Integer.Value +1;
706 }
707 else
708 {
709 ReturnDesc->Integer.Value = TempDesc->Integer.Value -1;
710 }
711
712 /* Finished with this Integer object */
713
714 AcpiUtRemoveReference (TempDesc);
715
716 /*
717 * Store the result back (indirectly) through the original
718 * Reference object
719 */
720 Status = AcpiExStore (ReturnDesc, Operand[0], WalkState);
721 break;
722
723 case AML_TYPE_OP: /* ObjectType (SourceObject) */
724 /*
725 * Note: The operand is not resolved at this point because we want to
726 * get the associated object, not its value. For example, we don't
727 * want to resolve a FieldUnit to its value, we want the actual
728 * FieldUnit object.
729 */
730
731 /* Get the type of the base object */
732
733 Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL);
734 if (ACPI_FAILURE (Status))
735 {
736 goto Cleanup;
737 }
738
739 /* Allocate a descriptor to hold the type. */
740
741 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type);
742 if (!ReturnDesc)
743 {
744 Status = AE_NO_MEMORY;
745 goto Cleanup;
746 }
747 break;
748
749 case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */
750 /*
751 * Note: The operand is not resolved at this point because we want to
752 * get the associated object, not its value.
753 */
754
755 /* Get the base object */
756
757 Status = AcpiExResolveMultiple (WalkState,
758 Operand[0], &Type, &TempDesc);
759 if (ACPI_FAILURE (Status))
760 {
761 goto Cleanup;
762 }
763
764 /*
765 * The type of the base object must be integer, buffer, string, or
766 * package. All others are not supported.
767 *
768 * NOTE: Integer is not specifically supported by the ACPI spec,
769 * but is supported implicitly via implicit operand conversion.
770 * rather than bother with conversion, we just use the byte width
771 * global (4 or 8 bytes).
772 */
773 switch (Type)
774 {
775 case ACPI_TYPE_INTEGER:
776
777 Value = AcpiGbl_IntegerByteWidth;
778 break;
779
780 case ACPI_TYPE_STRING:
781
782 Value = TempDesc->String.Length;
783 break;
784
785 case ACPI_TYPE_BUFFER:
786
787 /* Buffer arguments may not be evaluated at this point */
788
789 Status = AcpiDsGetBufferArguments (TempDesc);
790 Value = TempDesc->Buffer.Length;
791 break;
792
793 case ACPI_TYPE_PACKAGE:
794
795 /* Package arguments may not be evaluated at this point */
796
797 Status = AcpiDsGetPackageArguments (TempDesc);
798 Value = TempDesc->Package.Count;
799 break;
800
801 default:
802
803 ACPI_ERROR ((AE_INFO,
804 "Operand must be Buffer/Integer/String/Package - found type %s",
805 AcpiUtGetTypeName (Type)));
806 Status = AE_AML_OPERAND_TYPE;
807 goto Cleanup;
808 }
809
810 if (ACPI_FAILURE (Status))
811 {
812 goto Cleanup;
813 }
814
815 /*
816 * Now that we have the size of the object, create a result
817 * object to hold the value
818 */
819 ReturnDesc = AcpiUtCreateIntegerObject (Value);
820 if (!ReturnDesc)
821 {
822 Status = AE_NO_MEMORY;
823 goto Cleanup;
824 }
825 break;
826
827
828 case AML_REF_OF_OP: /* RefOf (SourceObject) */
829
830 Status = AcpiExGetObjectReference (Operand[0], &ReturnDesc, WalkState);
831 if (ACPI_FAILURE (Status))
832 {
833 goto Cleanup;
834 }
835 break;
836
837
838 case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */
839
840 /* Check for a method local or argument, or standalone String */
841
842 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
843 {
844 TempDesc = AcpiNsGetAttachedObject (
845 (ACPI_NAMESPACE_NODE *) Operand[0]);
846 if (TempDesc &&
847 ((TempDesc->Common.Type == ACPI_TYPE_STRING) ||
848 (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)))
849 {
850 Operand[0] = TempDesc;
851 AcpiUtAddReference (TempDesc);
852 }
853 else
854 {
855 Status = AE_AML_OPERAND_TYPE;
856 goto Cleanup;
857 }
858 }
859 else
860 {
861 switch ((Operand[0])->Common.Type)
862 {
863 case ACPI_TYPE_LOCAL_REFERENCE:
864 /*
865 * This is a DerefOf (LocalX | ArgX)
866 *
867 * Must resolve/dereference the local/arg reference first
868 */
869 switch (Operand[0]->Reference.Class)
870 {
871 case ACPI_REFCLASS_LOCAL:
872 case ACPI_REFCLASS_ARG:
873
874 /* Set Operand[0] to the value of the local/arg */
875
876 Status = AcpiDsMethodDataGetValue (
877 Operand[0]->Reference.Class,
878 Operand[0]->Reference.Value,
879 WalkState, &TempDesc);
880 if (ACPI_FAILURE (Status))
881 {
882 goto Cleanup;
883 }
884
885 /*
886 * Delete our reference to the input object and
887 * point to the object just retrieved
888 */
889 AcpiUtRemoveReference (Operand[0]);
890 Operand[0] = TempDesc;
891 break;
892
893 case ACPI_REFCLASS_REFOF:
894
895 /* Get the object to which the reference refers */
896
897 TempDesc = Operand[0]->Reference.Object;
898 AcpiUtRemoveReference (Operand[0]);
899 Operand[0] = TempDesc;
900 break;
901
902 default:
903
904 /* Must be an Index op - handled below */
905 break;
906 }
907 break;
908
909 case ACPI_TYPE_STRING:
910
911 break;
912
913 default:
914
915 Status = AE_AML_OPERAND_TYPE;
916 goto Cleanup;
917 }
918 }
919
920 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED)
921 {
922 if ((Operand[0])->Common.Type == ACPI_TYPE_STRING)
923 {
924 /*
925 * This is a DerefOf (String). The string is a reference
926 * to a named ACPI object.
927 *
928 * 1) Find the owning Node
929 * 2) Dereference the node to an actual object. Could be a
930 * Field, so we need to resolve the node to a value.
931 */
932 Status = AcpiNsGetNode (WalkState->ScopeInfo->Scope.Node,
933 Operand[0]->String.Pointer,
934 ACPI_NS_SEARCH_PARENT,
935 ACPI_CAST_INDIRECT_PTR (
936 ACPI_NAMESPACE_NODE, &ReturnDesc));
937 if (ACPI_FAILURE (Status))
938 {
939 goto Cleanup;
940 }
941
942 Status = AcpiExResolveNodeToValue (
943 ACPI_CAST_INDIRECT_PTR (
944 ACPI_NAMESPACE_NODE, &ReturnDesc),
945 WalkState);
946 goto Cleanup;
947 }
948 }
949
950 /* Operand[0] may have changed from the code above */
951
952 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
953 {
954 /*
955 * This is a DerefOf (ObjectReference)
956 * Get the actual object from the Node (This is the dereference).
957 * This case may only happen when a LocalX or ArgX is
958 * dereferenced above.
959 */
960 ReturnDesc = AcpiNsGetAttachedObject (
961 (ACPI_NAMESPACE_NODE *) Operand[0]);
962 AcpiUtAddReference (ReturnDesc);
963 }
964 else
965 {
966 /*
967 * This must be a reference object produced by either the
968 * Index() or RefOf() operator
969 */
970 switch (Operand[0]->Reference.Class)
971 {
972 case ACPI_REFCLASS_INDEX:
973 /*
974 * The target type for the Index operator must be
975 * either a Buffer or a Package
976 */
977 switch (Operand[0]->Reference.TargetType)
978 {
979 case ACPI_TYPE_BUFFER_FIELD:
980
981 TempDesc = Operand[0]->Reference.Object;
982
983 /*
984 * Create a new object that contains one element of the
985 * buffer -- the element pointed to by the index.
986 *
987 * NOTE: index into a buffer is NOT a pointer to a
988 * sub-buffer of the main buffer, it is only a pointer to a
989 * single element (byte) of the buffer!
990 *
991 * Since we are returning the value of the buffer at the
992 * indexed location, we don't need to add an additional
993 * reference to the buffer itself.
994 */
995 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64)
996 TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]);
997 if (!ReturnDesc)
998 {
999 Status = AE_NO_MEMORY;
1000 goto Cleanup;
1001 }
1002 break;
1003
1004 case ACPI_TYPE_PACKAGE:
1005 /*
1006 * Return the referenced element of the package. We must
1007 * add another reference to the referenced object, however.
1008 */
1009 ReturnDesc = *(Operand[0]->Reference.Where);
1010 if (!ReturnDesc)
1011 {
1012 /*
1013 * Element is NULL, do not allow the dereference.
1014 * This provides compatibility with other ACPI
1015 * implementations.
1016 */
1017 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ELEMENT);
1018 }
1019
1020 AcpiUtAddReference (ReturnDesc);
1021 break;
1022
1023 default:
1024
1025 ACPI_ERROR ((AE_INFO,
1026 "Unknown Index TargetType 0x%X in reference object %p",
1027 Operand[0]->Reference.TargetType, Operand[0]));
1028 Status = AE_AML_OPERAND_TYPE;
1029 goto Cleanup;
1030 }
1031 break;
1032
1033 case ACPI_REFCLASS_REFOF:
1034
1035 ReturnDesc = Operand[0]->Reference.Object;
1036
1037 if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) ==
1038 ACPI_DESC_TYPE_NAMED)
1039 {
1040 ReturnDesc = AcpiNsGetAttachedObject (
1041 (ACPI_NAMESPACE_NODE *) ReturnDesc);
1042 if (!ReturnDesc)
1043 {
1044 break;
1045 }
1046
1047 /*
1048 * June 2013:
1049 * BufferFields/FieldUnits require additional resolution
1050 */
1051 switch (ReturnDesc->Common.Type)
1052 {
1053 case ACPI_TYPE_BUFFER_FIELD:
1054 case ACPI_TYPE_LOCAL_REGION_FIELD:
1055 case ACPI_TYPE_LOCAL_BANK_FIELD:
1056 case ACPI_TYPE_LOCAL_INDEX_FIELD:
1057
1058 Status = AcpiExReadDataFromField (WalkState,
1059 ReturnDesc, &TempDesc);
1060 if (ACPI_FAILURE (Status))
1061 {
1062 goto Cleanup;
1063 }
1064
1065 ReturnDesc = TempDesc;
1066 break;
1067
1068 default:
1069
1070 /* Add another reference to the object */
1071
1072 AcpiUtAddReference (ReturnDesc);
1073 break;
1074 }
1075 }
1076 break;
1077
1078 default:
1079
1080 ACPI_ERROR ((AE_INFO,
1081 "Unknown class in reference(%p) - 0x%2.2X",
1082 Operand[0], Operand[0]->Reference.Class));
1083
1084 Status = AE_TYPE;
1085 goto Cleanup;
1086 }
1087 }
1088 break;
1089
1090 default:
1091
1092 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
1093 WalkState->Opcode));
1094 Status = AE_AML_BAD_OPCODE;
1095 goto Cleanup;
1096 }
1097
1098
1099 Cleanup:
1100
1101 /* Delete return object on error */
1102
1103 if (ACPI_FAILURE (Status))
1104 {
1105 AcpiUtRemoveReference (ReturnDesc);
1106 }
1107
1108 /* Save return object on success */
1109
1110 else
1111 {
1112 WalkState->ResultObj = ReturnDesc;
1113 }
1114
1115 return_ACPI_STATUS (Status);
1116 }
1117