1/******************************************************************************
2 *
3 * Module Name: exoparg1 - AML execution - opcodes with 1 argument
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include "acpi.h"
45#include "accommon.h"
46#include "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
91ACPI_STATUS
92AcpiExOpcode_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
127Cleanup:
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
160ACPI_STATUS
161AcpiExOpcode_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
231ACPI_STATUS
232AcpiExOpcode_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
261Cleanup:
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
280ACPI_STATUS
281AcpiExOpcode_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 (
513 Operand[0], &ReturnDesc, WalkState);
514 break;
515
516 case AML_TO_DECSTRING_OP: /* ToDecimalString (Data, Result) */
517
518 Status = AcpiExConvertToString (
519 Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_DECIMAL);
520 if (ReturnDesc == Operand[0])
521 {
522 /* No conversion performed, add ref to handle return value */
523
524 AcpiUtAddReference (ReturnDesc);
525 }
526 break;
527
528 case AML_TO_HEXSTRING_OP: /* ToHexString (Data, Result) */
529
530 Status = AcpiExConvertToString (
531 Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_HEX);
532 if (ReturnDesc == Operand[0])
533 {
534 /* No conversion performed, add ref to handle return value */
535
536 AcpiUtAddReference (ReturnDesc);
537 }
538 break;
539
540 case AML_TO_BUFFER_OP: /* ToBuffer (Data, Result) */
541
542 Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc);
543 if (ReturnDesc == Operand[0])
544 {
545 /* No conversion performed, add ref to handle return value */
546
547 AcpiUtAddReference (ReturnDesc);
548 }
549 break;
550
551 case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */
552
553 /* Perform "explicit" conversion */
554
555 Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc, 0);
556 if (ReturnDesc == Operand[0])
557 {
558 /* No conversion performed, add ref to handle return value */
559
560 AcpiUtAddReference (ReturnDesc);
561 }
562 break;
563
564 case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */
565 case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */
566
567 /* These are two obsolete opcodes */
568
569 ACPI_ERROR ((AE_INFO,
570 "%s is obsolete and not implemented",
571 AcpiPsGetOpcodeName (WalkState->Opcode)));
572 Status = AE_SUPPORT;
573 goto Cleanup;
574
575 default: /* Unknown opcode */
576
577 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
578 WalkState->Opcode));
579 Status = AE_AML_BAD_OPCODE;
580 goto Cleanup;
581 }
582
583 if (ACPI_SUCCESS (Status))
584 {
585 /* Store the return value computed above into the target object */
586
587 Status = AcpiExStore (ReturnDesc, Operand[1], WalkState);
588 }
589
590
591Cleanup:
592
593 /* Delete return object on error */
594
595 if (ACPI_FAILURE (Status))
596 {
597 AcpiUtRemoveReference (ReturnDesc);
598 }
599
600 /* Save return object on success */
601
602 else if (!WalkState->ResultObj)
603 {
604 WalkState->ResultObj = ReturnDesc;
605 }
606
607 return_ACPI_STATUS (Status);
608}
609
610
611/*******************************************************************************
612 *
613 * FUNCTION: AcpiExOpcode_1A_0T_1R
614 *
615 * PARAMETERS: WalkState - Current state (contains AML opcode)
616 *
617 * RETURN: Status
618 *
619 * DESCRIPTION: Execute opcode with one argument, no target, and a return value
620 *
621 ******************************************************************************/
622
623ACPI_STATUS
624AcpiExOpcode_1A_0T_1R (
625 ACPI_WALK_STATE *WalkState)
626{
627 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
628 ACPI_OPERAND_OBJECT *TempDesc;
629 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
630 ACPI_STATUS Status = AE_OK;
631 UINT32 Type;
632 UINT64 Value;
633
634
635 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R,
636 AcpiPsGetOpcodeName (WalkState->Opcode));
637
638
639 /* Examine the AML opcode */
640
641 switch (WalkState->Opcode)
642 {
643 case AML_LNOT_OP: /* LNot (Operand) */
644
645 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0);
646 if (!ReturnDesc)
647 {
648 Status = AE_NO_MEMORY;
649 goto Cleanup;
650 }
651
652 /*
653 * Set result to ONES (TRUE) if Value == 0. Note:
654 * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above.
655 */
656 if (!Operand[0]->Integer.Value)
657 {
658 ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
659 }
660 break;
661
662 case AML_DECREMENT_OP: /* Decrement (Operand) */
663 case AML_INCREMENT_OP: /* Increment (Operand) */
664 /*
665 * Create a new integer. Can't just get the base integer and
666 * increment it because it may be an Arg or Field.
667 */
668 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
669 if (!ReturnDesc)
670 {
671 Status = AE_NO_MEMORY;
672 goto Cleanup;
673 }
674
675 /*
676 * Since we are expecting a Reference operand, it can be either a
677 * NS Node or an internal object.
678 */
679 TempDesc = Operand[0];
680 if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND)
681 {
682 /* Internal reference object - prevent deletion */
683
684 AcpiUtAddReference (TempDesc);
685 }
686
687 /*
688 * Convert the Reference operand to an Integer (This removes a
689 * reference on the Operand[0] object)
690 *
691 * NOTE: We use LNOT_OP here in order to force resolution of the
692 * reference operand to an actual integer.
693 */
694 Status = AcpiExResolveOperands (AML_LNOT_OP, &TempDesc, WalkState);
695 if (ACPI_FAILURE (Status))
696 {
697 ACPI_EXCEPTION ((AE_INFO, Status,
698 "While resolving operands for [%s]",
699 AcpiPsGetOpcodeName (WalkState->Opcode)));
700
701 goto Cleanup;
702 }
703
704 /*
705 * TempDesc is now guaranteed to be an Integer object --
706 * Perform the actual increment or decrement
707 */
708 if (WalkState->Opcode == AML_INCREMENT_OP)
709 {
710 ReturnDesc->Integer.Value = TempDesc->Integer.Value + 1;
711 }
712 else
713 {
714 ReturnDesc->Integer.Value = TempDesc->Integer.Value - 1;
715 }
716
717 /* Finished with this Integer object */
718
719 AcpiUtRemoveReference (TempDesc);
720
721 /*
722 * Store the result back (indirectly) through the original
723 * Reference object
724 */
725 Status = AcpiExStore (ReturnDesc, Operand[0], WalkState);
726 break;
727
728 case AML_OBJECT_TYPE_OP: /* ObjectType (SourceObject) */
729 /*
730 * Note: The operand is not resolved at this point because we want to
731 * get the associated object, not its value. For example, we don't
732 * want to resolve a FieldUnit to its value, we want the actual
733 * FieldUnit object.
734 */
735
736 /* Get the type of the base object */
737
738 Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL);
739 if (ACPI_FAILURE (Status))
740 {
741 goto Cleanup;
742 }
743
744 /* Allocate a descriptor to hold the type. */
745
746 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type);
747 if (!ReturnDesc)
748 {
749 Status = AE_NO_MEMORY;
750 goto Cleanup;
751 }
752 break;
753
754 case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */
755 /*
756 * Note: The operand is not resolved at this point because we want to
757 * get the associated object, not its value.
758 */
759
760 /* Get the base object */
761
762 Status = AcpiExResolveMultiple (
763 WalkState, Operand[0], &Type, &TempDesc);
764 if (ACPI_FAILURE (Status))
765 {
766 goto Cleanup;
767 }
768
769 /*
770 * The type of the base object must be integer, buffer, string, or
771 * package. All others are not supported.
772 *
773 * NOTE: Integer is not specifically supported by the ACPI spec,
774 * but is supported implicitly via implicit operand conversion.
775 * rather than bother with conversion, we just use the byte width
776 * global (4 or 8 bytes).
777 */
778 switch (Type)
779 {
780 case ACPI_TYPE_INTEGER:
781
782 Value = AcpiGbl_IntegerByteWidth;
783 break;
784
785 case ACPI_TYPE_STRING:
786
787 Value = TempDesc->String.Length;
788 break;
789
790 case ACPI_TYPE_BUFFER:
791
792 /* Buffer arguments may not be evaluated at this point */
793
794 Status = AcpiDsGetBufferArguments (TempDesc);
795 Value = TempDesc->Buffer.Length;
796 break;
797
798 case ACPI_TYPE_PACKAGE:
799
800 /* Package arguments may not be evaluated at this point */
801
802 Status = AcpiDsGetPackageArguments (TempDesc);
803 Value = TempDesc->Package.Count;
804 break;
805
806 default:
807
808 ACPI_ERROR ((AE_INFO,
809 "Operand must be Buffer/Integer/String/Package"
810 " - found type %s",
811 AcpiUtGetTypeName (Type)));
812
813 Status = AE_AML_OPERAND_TYPE;
814 goto Cleanup;
815 }
816
817 if (ACPI_FAILURE (Status))
818 {
819 goto Cleanup;
820 }
821
822 /*
823 * Now that we have the size of the object, create a result
824 * object to hold the value
825 */
826 ReturnDesc = AcpiUtCreateIntegerObject (Value);
827 if (!ReturnDesc)
828 {
829 Status = AE_NO_MEMORY;
830 goto Cleanup;
831 }
832 break;
833
834
835 case AML_REF_OF_OP: /* RefOf (SourceObject) */
836
837 Status = AcpiExGetObjectReference (
838 Operand[0], &ReturnDesc, WalkState);
839 if (ACPI_FAILURE (Status))
840 {
841 goto Cleanup;
842 }
843 break;
844
845
846 case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */
847
848 /* Check for a method local or argument, or standalone String */
849
850 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
851 {
852 TempDesc = AcpiNsGetAttachedObject (
853 (ACPI_NAMESPACE_NODE *) Operand[0]);
854 if (TempDesc &&
855 ((TempDesc->Common.Type == ACPI_TYPE_STRING) ||
856 (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)))
857 {
858 Operand[0] = TempDesc;
859 AcpiUtAddReference (TempDesc);
860 }
861 else
862 {
863 Status = AE_AML_OPERAND_TYPE;
864 goto Cleanup;
865 }
866 }
867 else
868 {
869 switch ((Operand[0])->Common.Type)
870 {
871 case ACPI_TYPE_LOCAL_REFERENCE:
872 /*
873 * This is a DerefOf (LocalX | ArgX)
874 *
875 * Must resolve/dereference the local/arg reference first
876 */
877 switch (Operand[0]->Reference.Class)
878 {
879 case ACPI_REFCLASS_LOCAL:
880 case ACPI_REFCLASS_ARG:
881
882 /* Set Operand[0] to the value of the local/arg */
883
884 Status = AcpiDsMethodDataGetValue (
885 Operand[0]->Reference.Class,
886 Operand[0]->Reference.Value,
887 WalkState, &TempDesc);
888 if (ACPI_FAILURE (Status))
889 {
890 goto Cleanup;
891 }
892
893 /*
894 * Delete our reference to the input object and
895 * point to the object just retrieved
896 */
897 AcpiUtRemoveReference (Operand[0]);
898 Operand[0] = TempDesc;
899 break;
900
901 case ACPI_REFCLASS_REFOF:
902
903 /* Get the object to which the reference refers */
904
905 TempDesc = Operand[0]->Reference.Object;
906 AcpiUtRemoveReference (Operand[0]);
907 Operand[0] = TempDesc;
908 break;
909
910 default:
911
912 /* Must be an Index op - handled below */
913 break;
914 }
915 break;
916
917 case ACPI_TYPE_STRING:
918
919 break;
920
921 default:
922
923 Status = AE_AML_OPERAND_TYPE;
924 goto Cleanup;
925 }
926 }
927
928 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED)
929 {
930 if ((Operand[0])->Common.Type == ACPI_TYPE_STRING)
931 {
932 /*
933 * This is a DerefOf (String). The string is a reference
934 * to a named ACPI object.
935 *
936 * 1) Find the owning Node
937 * 2) Dereference the node to an actual object. Could be a
938 * Field, so we need to resolve the node to a value.
939 */
940 Status = AcpiNsGetNodeUnlocked (WalkState->ScopeInfo->Scope.Node,
941 Operand[0]->String.Pointer,
942 ACPI_NS_SEARCH_PARENT,
943 ACPI_CAST_INDIRECT_PTR (
944 ACPI_NAMESPACE_NODE, &ReturnDesc));
945 if (ACPI_FAILURE (Status))
946 {
947 goto Cleanup;
948 }
949
950 Status = AcpiExResolveNodeToValue (
951 ACPI_CAST_INDIRECT_PTR (
952 ACPI_NAMESPACE_NODE, &ReturnDesc),
953 WalkState);
954 goto Cleanup;
955 }
956 }
957
958 /* Operand[0] may have changed from the code above */
959
960 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
961 {
962 /*
963 * This is a DerefOf (ObjectReference)
964 * Get the actual object from the Node (This is the dereference).
965 * This case may only happen when a LocalX or ArgX is
966 * dereferenced above.
967 */
968 ReturnDesc = AcpiNsGetAttachedObject (
969 (ACPI_NAMESPACE_NODE *) Operand[0]);
970 AcpiUtAddReference (ReturnDesc);
971 }
972 else
973 {
974 /*
975 * This must be a reference object produced by either the
976 * Index() or RefOf() operator
977 */
978 switch (Operand[0]->Reference.Class)
979 {
980 case ACPI_REFCLASS_INDEX:
981 /*
982 * The target type for the Index operator must be
983 * either a Buffer or a Package
984 */
985 switch (Operand[0]->Reference.TargetType)
986 {
987 case ACPI_TYPE_BUFFER_FIELD:
988
989 TempDesc = Operand[0]->Reference.Object;
990
991 /*
992 * Create a new object that contains one element of the
993 * buffer -- the element pointed to by the index.
994 *
995 * NOTE: index into a buffer is NOT a pointer to a
996 * sub-buffer of the main buffer, it is only a pointer to a
997 * single element (byte) of the buffer!
998 *
999 * Since we are returning the value of the buffer at the
1000 * indexed location, we don't need to add an additional
1001 * reference to the buffer itself.
1002 */
1003 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64)
1004 TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]);
1005 if (!ReturnDesc)
1006 {
1007 Status = AE_NO_MEMORY;
1008 goto Cleanup;
1009 }
1010 break;
1011
1012 case ACPI_TYPE_PACKAGE:
1013 /*
1014 * Return the referenced element of the package. We must
1015 * add another reference to the referenced object, however.
1016 */
1017 ReturnDesc = *(Operand[0]->Reference.Where);
1018 if (!ReturnDesc)
1019 {
1020 /*
1021 * Element is NULL, do not allow the dereference.
1022 * This provides compatibility with other ACPI
1023 * implementations.
1024 */
1025 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ELEMENT);
1026 }
1027
1028 AcpiUtAddReference (ReturnDesc);
1029 break;
1030
1031 default:
1032
1033 ACPI_ERROR ((AE_INFO,
1034 "Unknown Index TargetType 0x%X in reference object %p",
1035 Operand[0]->Reference.TargetType, Operand[0]));
1036
1037 Status = AE_AML_OPERAND_TYPE;
1038 goto Cleanup;
1039 }
1040 break;
1041
1042 case ACPI_REFCLASS_REFOF:
1043
1044 ReturnDesc = Operand[0]->Reference.Object;
1045
1046 if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) ==
1047 ACPI_DESC_TYPE_NAMED)
1048 {
1049 ReturnDesc = AcpiNsGetAttachedObject (
1050 (ACPI_NAMESPACE_NODE *) ReturnDesc);
1051 if (!ReturnDesc)
1052 {
1053 break;
1054 }
1055
1056 /*
1057 * June 2013:
1058 * BufferFields/FieldUnits require additional resolution
1059 */
1060 switch (ReturnDesc->Common.Type)
1061 {
1062 case ACPI_TYPE_BUFFER_FIELD:
1063 case ACPI_TYPE_LOCAL_REGION_FIELD:
1064 case ACPI_TYPE_LOCAL_BANK_FIELD:
1065 case ACPI_TYPE_LOCAL_INDEX_FIELD:
1066
1067 Status = AcpiExReadDataFromField (
1068 WalkState, ReturnDesc, &TempDesc);
1069 if (ACPI_FAILURE (Status))
1070 {
1071 goto Cleanup;
1072 }
1073
1074 ReturnDesc = TempDesc;
1075 break;
1076
1077 default:
1078
1079 /* Add another reference to the object */
1080
1081 AcpiUtAddReference (ReturnDesc);
1082 break;
1083 }
1084 }
1085 break;
1086
1087 default:
1088
1089 ACPI_ERROR ((AE_INFO,
1090 "Unknown class in reference(%p) - 0x%2.2X",
1091 Operand[0], Operand[0]->Reference.Class));
1092
1093 Status = AE_TYPE;
1094 goto Cleanup;
1095 }
1096 }
1097 break;
1098
1099 default:
1100
1101 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
1102 WalkState->Opcode));
1103
1104 Status = AE_AML_BAD_OPCODE;
1105 goto Cleanup;
1106 }
1107
1108
1109Cleanup:
1110
1111 /* Delete return object on error */
1112
1113 if (ACPI_FAILURE (Status))
1114 {
1115 AcpiUtRemoveReference (ReturnDesc);
1116 }
1117
1118 /* Save return object on success */
1119
1120 else
1121 {
1122 WalkState->ResultObj = ReturnDesc;
1123 }
1124
1125 return_ACPI_STATUS (Status);
1126}
1127