1 /******************************************************************************
2 *
3 * Module Name: exoparg1 - AML execution - opcodes with 1 argument
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2013, 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 #define __EXOPARG1_C__
45
46 #include "acpi.h"
47 #include "accommon.h"
48 #include "acparser.h"
49 #include "acdispat.h"
50 #include "acinterp.h"
51 #include "amlcode.h"
52 #include "acnamesp.h"
53
54
55 #define _COMPONENT ACPI_EXECUTER
56 ACPI_MODULE_NAME ("exoparg1")
57
58
59 /*!
60 * Naming convention for AML interpreter execution routines.
61 *
62 * The routines that begin execution of AML opcodes are named with a common
63 * convention based upon the number of arguments, the number of target operands,
64 * and whether or not a value is returned:
65 *
66 * AcpiExOpcode_xA_yT_zR
67 *
68 * Where:
69 *
70 * xA - ARGUMENTS: The number of arguments (input operands) that are
71 * required for this opcode type (0 through 6 args).
72 * yT - TARGETS: The number of targets (output operands) that are required
73 * for this opcode type (0, 1, or 2 targets).
74 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
75 * as the function return (0 or 1).
76 *
77 * The AcpiExOpcode* functions are called via the Dispatcher component with
78 * fully resolved operands.
79 !*/
80
81 /*******************************************************************************
82 *
83 * FUNCTION: AcpiExOpcode_0A_0T_1R
84 *
85 * PARAMETERS: WalkState - Current state (contains AML opcode)
86 *
87 * RETURN: Status
88 *
89 * DESCRIPTION: Execute operator with no operands, one return value
90 *
91 ******************************************************************************/
92
93 ACPI_STATUS
94 AcpiExOpcode_0A_0T_1R (
95 ACPI_WALK_STATE *WalkState)
96 {
97 ACPI_STATUS Status = AE_OK;
98 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
99
100
101 ACPI_FUNCTION_TRACE_STR (ExOpcode_0A_0T_1R,
102 AcpiPsGetOpcodeName (WalkState->Opcode));
103
104
105 /* Examine the AML opcode */
106
107 switch (WalkState->Opcode)
108 {
109 case AML_TIMER_OP: /* Timer () */
110
111 /* Create a return object of type Integer */
112
113 ReturnDesc = AcpiUtCreateIntegerObject (AcpiOsGetTimer ());
114 if (!ReturnDesc)
115 {
116 Status = AE_NO_MEMORY;
117 goto Cleanup;
118 }
119 break;
120
121 default: /* Unknown opcode */
122
123 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
124 WalkState->Opcode));
125 Status = AE_AML_BAD_OPCODE;
126 break;
127 }
128
129 Cleanup:
130
131 /* Delete return object on error */
132
133 if ((ACPI_FAILURE (Status)) || WalkState->ResultObj)
134 {
135 AcpiUtRemoveReference (ReturnDesc);
136 WalkState->ResultObj = NULL;
137 }
138 else
139 {
140 /* Save the return value */
141
142 WalkState->ResultObj = ReturnDesc;
143 }
144
145 return_ACPI_STATUS (Status);
146 }
147
148
149 /*******************************************************************************
150 *
151 * FUNCTION: AcpiExOpcode_1A_0T_0R
152 *
153 * PARAMETERS: WalkState - Current state (contains AML opcode)
154 *
155 * RETURN: Status
156 *
157 * DESCRIPTION: Execute Type 1 monadic operator with numeric operand on
158 * object stack
159 *
160 ******************************************************************************/
161
162 ACPI_STATUS
163 AcpiExOpcode_1A_0T_0R (
164 ACPI_WALK_STATE *WalkState)
165 {
166 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
167 ACPI_STATUS Status = AE_OK;
168
169
170 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_0R,
171 AcpiPsGetOpcodeName (WalkState->Opcode));
172
173
174 /* Examine the AML opcode */
175
176 switch (WalkState->Opcode)
177 {
178 case AML_RELEASE_OP: /* Release (MutexObject) */
179
180 Status = AcpiExReleaseMutex (Operand[0], WalkState);
181 break;
182
183 case AML_RESET_OP: /* Reset (EventObject) */
184
185 Status = AcpiExSystemResetEvent (Operand[0]);
186 break;
187
188 case AML_SIGNAL_OP: /* Signal (EventObject) */
189
190 Status = AcpiExSystemSignalEvent (Operand[0]);
191 break;
192
193 case AML_SLEEP_OP: /* Sleep (MsecTime) */
194
195 Status = AcpiExSystemDoSleep (Operand[0]->Integer.Value);
196 break;
197
198 case AML_STALL_OP: /* Stall (UsecTime) */
199
200 Status = AcpiExSystemDoStall ((UINT32) Operand[0]->Integer.Value);
201 break;
202
203 case AML_UNLOAD_OP: /* Unload (Handle) */
204
205 Status = AcpiExUnloadTable (Operand[0]);
206 break;
207
208 default: /* Unknown opcode */
209
210 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
211 WalkState->Opcode));
212 Status = AE_AML_BAD_OPCODE;
213 break;
214 }
215
216 return_ACPI_STATUS (Status);
217 }
218
219
220 /*******************************************************************************
221 *
222 * FUNCTION: AcpiExOpcode_1A_1T_0R
223 *
224 * PARAMETERS: WalkState - Current state (contains AML opcode)
225 *
226 * RETURN: Status
227 *
228 * DESCRIPTION: Execute opcode with one argument, one target, and no
229 * return value.
230 *
231 ******************************************************************************/
232
233 ACPI_STATUS
234 AcpiExOpcode_1A_1T_0R (
235 ACPI_WALK_STATE *WalkState)
236 {
237 ACPI_STATUS Status = AE_OK;
238 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
239
240
241 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_0R,
242 AcpiPsGetOpcodeName (WalkState->Opcode));
243
244
245 /* Examine the AML opcode */
246
247 switch (WalkState->Opcode)
248 {
249 case AML_LOAD_OP:
250
251 Status = AcpiExLoadOp (Operand[0], Operand[1], WalkState);
252 break;
253
254 default: /* Unknown opcode */
255
256 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
257 WalkState->Opcode));
258 Status = AE_AML_BAD_OPCODE;
259 goto Cleanup;
260 }
261
262
263 Cleanup:
264
265 return_ACPI_STATUS (Status);
266 }
267
268
269 /*******************************************************************************
270 *
271 * FUNCTION: AcpiExOpcode_1A_1T_1R
272 *
273 * PARAMETERS: WalkState - Current state (contains AML opcode)
274 *
275 * RETURN: Status
276 *
277 * DESCRIPTION: Execute opcode with one argument, one target, and a
278 * return value.
279 *
280 ******************************************************************************/
281
282 ACPI_STATUS
283 AcpiExOpcode_1A_1T_1R (
284 ACPI_WALK_STATE *WalkState)
285 {
286 ACPI_STATUS Status = AE_OK;
287 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
288 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
289 ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL;
290 UINT32 Temp32;
291 UINT32 i;
292 UINT64 PowerOfTen;
293 UINT64 Digit;
294
295
296 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_1R,
297 AcpiPsGetOpcodeName (WalkState->Opcode));
298
299
300 /* Examine the AML opcode */
301
302 switch (WalkState->Opcode)
303 {
304 case AML_BIT_NOT_OP:
305 case AML_FIND_SET_LEFT_BIT_OP:
306 case AML_FIND_SET_RIGHT_BIT_OP:
307 case AML_FROM_BCD_OP:
308 case AML_TO_BCD_OP:
309 case AML_COND_REF_OF_OP:
310
311 /* Create a return object of type Integer for these opcodes */
312
313 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
314 if (!ReturnDesc)
315 {
316 Status = AE_NO_MEMORY;
317 goto Cleanup;
318 }
319
320 switch (WalkState->Opcode)
321 {
322 case AML_BIT_NOT_OP: /* Not (Operand, Result) */
323
324 ReturnDesc->Integer.Value = ~Operand[0]->Integer.Value;
325 break;
326
327 case AML_FIND_SET_LEFT_BIT_OP: /* FindSetLeftBit (Operand, Result) */
328
329 ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
330
331 /*
332 * Acpi specification describes Integer type as a little
333 * endian unsigned value, so this boundary condition is valid.
334 */
335 for (Temp32 = 0; ReturnDesc->Integer.Value &&
336 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
337 {
338 ReturnDesc->Integer.Value >>= 1;
339 }
340
341 ReturnDesc->Integer.Value = Temp32;
342 break;
343
344 case AML_FIND_SET_RIGHT_BIT_OP: /* FindSetRightBit (Operand, Result) */
345
346 ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
347
348 /*
349 * The Acpi specification describes Integer type as a little
350 * endian unsigned value, so this boundary condition is valid.
351 */
352 for (Temp32 = 0; ReturnDesc->Integer.Value &&
353 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
354 {
355 ReturnDesc->Integer.Value <<= 1;
356 }
357
358 /* Since the bit position is one-based, subtract from 33 (65) */
359
360 ReturnDesc->Integer.Value =
361 Temp32 == 0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - Temp32;
362 break;
363
364 case AML_FROM_BCD_OP: /* FromBcd (BCDValue, Result) */
365 /*
366 * The 64-bit ACPI integer can hold 16 4-bit BCD characters
367 * (if table is 32-bit, integer can hold 8 BCD characters)
368 * Convert each 4-bit BCD value
369 */
370 PowerOfTen = 1;
371 ReturnDesc->Integer.Value = 0;
372 Digit = Operand[0]->Integer.Value;
373
374 /* Convert each BCD digit (each is one nybble wide) */
375
376 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
377 {
378 /* Get the least significant 4-bit BCD digit */
379
380 Temp32 = ((UINT32) Digit) & 0xF;
381
382 /* Check the range of the digit */
383
384 if (Temp32 > 9)
385 {
386 ACPI_ERROR ((AE_INFO,
387 "BCD digit too large (not decimal): 0x%X",
388 Temp32));
389
390 Status = AE_AML_NUMERIC_OVERFLOW;
391 goto Cleanup;
392 }
393
394 /* Sum the digit into the result with the current power of 10 */
395
396 ReturnDesc->Integer.Value +=
397 (((UINT64) Temp32) * PowerOfTen);
398
399 /* Shift to next BCD digit */
400
401 Digit >>= 4;
402
403 /* Next power of 10 */
404
405 PowerOfTen *= 10;
406 }
407 break;
408
409 case AML_TO_BCD_OP: /* ToBcd (Operand, Result) */
410
411 ReturnDesc->Integer.Value = 0;
412 Digit = Operand[0]->Integer.Value;
413
414 /* Each BCD digit is one nybble wide */
415
416 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
417 {
418 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Temp32);
419
420 /*
421 * Insert the BCD digit that resides in the
422 * remainder from above
423 */
424 ReturnDesc->Integer.Value |=
425 (((UINT64) Temp32) << ACPI_MUL_4 (i));
426 }
427
428 /* Overflow if there is any data left in Digit */
429
430 if (Digit > 0)
431 {
432 ACPI_ERROR ((AE_INFO,
433 "Integer too large to convert to BCD: 0x%8.8X%8.8X",
434 ACPI_FORMAT_UINT64 (Operand[0]->Integer.Value)));
435 Status = AE_AML_NUMERIC_OVERFLOW;
436 goto Cleanup;
437 }
438 break;
439
440 case AML_COND_REF_OF_OP: /* CondRefOf (SourceObject, Result) */
441 /*
442 * This op is a little strange because the internal return value is
443 * different than the return value stored in the result descriptor
444 * (There are really two return values)
445 */
446 if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode)
447 {
448 /*
449 * This means that the object does not exist in the namespace,
450 * return FALSE
451 */
452 ReturnDesc->Integer.Value = 0;
453 goto Cleanup;
454 }
455
456 /* Get the object reference, store it, and remove our reference */
457
458 Status = AcpiExGetObjectReference (Operand[0],
459 &ReturnDesc2, WalkState);
460 if (ACPI_FAILURE (Status))
461 {
462 goto Cleanup;
463 }
464
465 Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState);
466 AcpiUtRemoveReference (ReturnDesc2);
467
468 /* The object exists in the namespace, return TRUE */
469
470 ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
471 goto Cleanup;
472
473
474 default:
475
476 /* No other opcodes get here */
477
478 break;
479 }
480 break;
481
482 case AML_STORE_OP: /* Store (Source, Target) */
483 /*
484 * A store operand is typically a number, string, buffer or lvalue
485 * Be careful about deleting the source object,
486 * since the object itself may have been stored.
487 */
488 Status = AcpiExStore (Operand[0], Operand[1], WalkState);
489 if (ACPI_FAILURE (Status))
490 {
491 return_ACPI_STATUS (Status);
492 }
493
494 /* It is possible that the Store already produced a return object */
495
496 if (!WalkState->ResultObj)
497 {
498 /*
499 * Normally, we would remove a reference on the Operand[0]
500 * parameter; But since it is being used as the internal return
501 * object (meaning we would normally increment it), the two
502 * cancel out, and we simply don't do anything.
503 */
504 WalkState->ResultObj = Operand[0];
505 WalkState->Operands[0] = NULL; /* Prevent deletion */
506 }
507 return_ACPI_STATUS (Status);
508
509 /*
510 * ACPI 2.0 Opcodes
511 */
512 case AML_COPY_OP: /* Copy (Source, Target) */
513
514 Status = AcpiUtCopyIobjectToIobject (Operand[0], &ReturnDesc,
515 WalkState);
516 break;
517
518 case AML_TO_DECSTRING_OP: /* ToDecimalString (Data, Result) */
519
520 Status = AcpiExConvertToString (Operand[0], &ReturnDesc,
521 ACPI_EXPLICIT_CONVERT_DECIMAL);
522 if (ReturnDesc == Operand[0])
523 {
524 /* No conversion performed, add ref to handle return value */
525 AcpiUtAddReference (ReturnDesc);
526 }
527 break;
528
529 case AML_TO_HEXSTRING_OP: /* ToHexString (Data, Result) */
530
531 Status = AcpiExConvertToString (Operand[0], &ReturnDesc,
532 ACPI_EXPLICIT_CONVERT_HEX);
533 if (ReturnDesc == Operand[0])
534 {
535 /* No conversion performed, add ref to handle return value */
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 AcpiUtAddReference (ReturnDesc);
547 }
548 break;
549
550 case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */
551
552 Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc,
553 ACPI_ANY_BASE);
554 if (ReturnDesc == Operand[0])
555 {
556 /* No conversion performed, add ref to handle return value */
557 AcpiUtAddReference (ReturnDesc);
558 }
559 break;
560
561 case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */
562 case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */
563
564 /* These are two obsolete opcodes */
565
566 ACPI_ERROR ((AE_INFO,
567 "%s is obsolete and not implemented",
568 AcpiPsGetOpcodeName (WalkState->Opcode)));
569 Status = AE_SUPPORT;
570 goto Cleanup;
571
572 default: /* Unknown opcode */
573
574 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
575 WalkState->Opcode));
576 Status = AE_AML_BAD_OPCODE;
577 goto Cleanup;
578 }
579
580 if (ACPI_SUCCESS (Status))
581 {
582 /* Store the return value computed above into the target object */
583
584 Status = AcpiExStore (ReturnDesc, Operand[1], WalkState);
585 }
586
587
588 Cleanup:
589
590 /* Delete return object on error */
591
592 if (ACPI_FAILURE (Status))
593 {
594 AcpiUtRemoveReference (ReturnDesc);
595 }
596
597 /* Save return object on success */
598
599 else if (!WalkState->ResultObj)
600 {
601 WalkState->ResultObj = ReturnDesc;
602 }
603
604 return_ACPI_STATUS (Status);
605 }
606
607
608 /*******************************************************************************
609 *
610 * FUNCTION: AcpiExOpcode_1A_0T_1R
611 *
612 * PARAMETERS: WalkState - Current state (contains AML opcode)
613 *
614 * RETURN: Status
615 *
616 * DESCRIPTION: Execute opcode with one argument, no target, and a return value
617 *
618 ******************************************************************************/
619
620 ACPI_STATUS
621 AcpiExOpcode_1A_0T_1R (
622 ACPI_WALK_STATE *WalkState)
623 {
624 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
625 ACPI_OPERAND_OBJECT *TempDesc;
626 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
627 ACPI_STATUS Status = AE_OK;
628 UINT32 Type;
629 UINT64 Value;
630
631
632 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R,
633 AcpiPsGetOpcodeName (WalkState->Opcode));
634
635
636 /* Examine the AML opcode */
637
638 switch (WalkState->Opcode)
639 {
640 case AML_LNOT_OP: /* LNot (Operand) */
641
642 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0);
643 if (!ReturnDesc)
644 {
645 Status = AE_NO_MEMORY;
646 goto Cleanup;
647 }
648
649 /*
650 * Set result to ONES (TRUE) if Value == 0. Note:
651 * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above.
652 */
653 if (!Operand[0]->Integer.Value)
654 {
655 ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
656 }
657 break;
658
659 case AML_DECREMENT_OP: /* Decrement (Operand) */
660 case AML_INCREMENT_OP: /* Increment (Operand) */
661 /*
662 * Create a new integer. Can't just get the base integer and
663 * increment it because it may be an Arg or Field.
664 */
665 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
666 if (!ReturnDesc)
667 {
668 Status = AE_NO_MEMORY;
669 goto Cleanup;
670 }
671
672 /*
673 * Since we are expecting a Reference operand, it can be either a
674 * NS Node or an internal object.
675 */
676 TempDesc = Operand[0];
677 if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND)
678 {
679 /* Internal reference object - prevent deletion */
680
681 AcpiUtAddReference (TempDesc);
682 }
683
684 /*
685 * Convert the Reference operand to an Integer (This removes a
686 * reference on the Operand[0] object)
687 *
688 * NOTE: We use LNOT_OP here in order to force resolution of the
689 * reference operand to an actual integer.
690 */
691 Status = AcpiExResolveOperands (AML_LNOT_OP, &TempDesc, WalkState);
692 if (ACPI_FAILURE (Status))
693 {
694 ACPI_EXCEPTION ((AE_INFO, Status,
695 "While resolving operands for [%s]",
696 AcpiPsGetOpcodeName (WalkState->Opcode)));
697
698 goto Cleanup;
699 }
700
701 /*
702 * TempDesc is now guaranteed to be an Integer object --
703 * Perform the actual increment or decrement
704 */
705 if (WalkState->Opcode == AML_INCREMENT_OP)
706 {
707 ReturnDesc->Integer.Value = TempDesc->Integer.Value +1;
708 }
709 else
710 {
711 ReturnDesc->Integer.Value = TempDesc->Integer.Value -1;
712 }
713
714 /* Finished with this Integer object */
715
716 AcpiUtRemoveReference (TempDesc);
717
718 /*
719 * Store the result back (indirectly) through the original
720 * Reference object
721 */
722 Status = AcpiExStore (ReturnDesc, Operand[0], WalkState);
723 break;
724
725 case AML_TYPE_OP: /* ObjectType (SourceObject) */
726 /*
727 * Note: The operand is not resolved at this point because we want to
728 * get the associated object, not its value. For example, we don't
729 * want to resolve a FieldUnit to its value, we want the actual
730 * FieldUnit object.
731 */
732
733 /* Get the type of the base object */
734
735 Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL);
736 if (ACPI_FAILURE (Status))
737 {
738 goto Cleanup;
739 }
740
741 /* Allocate a descriptor to hold the type. */
742
743 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type);
744 if (!ReturnDesc)
745 {
746 Status = AE_NO_MEMORY;
747 goto Cleanup;
748 }
749 break;
750
751 case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */
752 /*
753 * Note: The operand is not resolved at this point because we want to
754 * get the associated object, not its value.
755 */
756
757 /* Get the base object */
758
759 Status = AcpiExResolveMultiple (WalkState,
760 Operand[0], &Type, &TempDesc);
761 if (ACPI_FAILURE (Status))
762 {
763 goto Cleanup;
764 }
765
766 /*
767 * The type of the base object must be integer, buffer, string, or
768 * package. All others are not supported.
769 *
770 * NOTE: Integer is not specifically supported by the ACPI spec,
771 * but is supported implicitly via implicit operand conversion.
772 * rather than bother with conversion, we just use the byte width
773 * global (4 or 8 bytes).
774 */
775 switch (Type)
776 {
777 case ACPI_TYPE_INTEGER:
778
779 Value = AcpiGbl_IntegerByteWidth;
780 break;
781
782 case ACPI_TYPE_STRING:
783
784 Value = TempDesc->String.Length;
785 break;
786
787 case ACPI_TYPE_BUFFER:
788
789 /* Buffer arguments may not be evaluated at this point */
790
791 Status = AcpiDsGetBufferArguments (TempDesc);
792 Value = TempDesc->Buffer.Length;
793 break;
794
795 case ACPI_TYPE_PACKAGE:
796
797 /* Package arguments may not be evaluated at this point */
798
799 Status = AcpiDsGetPackageArguments (TempDesc);
800 Value = TempDesc->Package.Count;
801 break;
802
803 default:
804
805 ACPI_ERROR ((AE_INFO,
806 "Operand must be Buffer/Integer/String/Package - found type %s",
807 AcpiUtGetTypeName (Type)));
808 Status = AE_AML_OPERAND_TYPE;
809 goto Cleanup;
810 }
811
812 if (ACPI_FAILURE (Status))
813 {
814 goto Cleanup;
815 }
816
817 /*
818 * Now that we have the size of the object, create a result
819 * object to hold the value
820 */
821 ReturnDesc = AcpiUtCreateIntegerObject (Value);
822 if (!ReturnDesc)
823 {
824 Status = AE_NO_MEMORY;
825 goto Cleanup;
826 }
827 break;
828
829
830 case AML_REF_OF_OP: /* RefOf (SourceObject) */
831
832 Status = AcpiExGetObjectReference (Operand[0], &ReturnDesc, WalkState);
833 if (ACPI_FAILURE (Status))
834 {
835 goto Cleanup;
836 }
837 break;
838
839
840 case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */
841
842 /* Check for a method local or argument, or standalone String */
843
844 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
845 {
846 TempDesc = AcpiNsGetAttachedObject (
847 (ACPI_NAMESPACE_NODE *) Operand[0]);
848 if (TempDesc &&
849 ((TempDesc->Common.Type == ACPI_TYPE_STRING) ||
850 (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)))
851 {
852 Operand[0] = TempDesc;
853 AcpiUtAddReference (TempDesc);
854 }
855 else
856 {
857 Status = AE_AML_OPERAND_TYPE;
858 goto Cleanup;
859 }
860 }
861 else
862 {
863 switch ((Operand[0])->Common.Type)
864 {
865 case ACPI_TYPE_LOCAL_REFERENCE:
866 /*
867 * This is a DerefOf (LocalX | ArgX)
868 *
869 * Must resolve/dereference the local/arg reference first
870 */
871 switch (Operand[0]->Reference.Class)
872 {
873 case ACPI_REFCLASS_LOCAL:
874 case ACPI_REFCLASS_ARG:
875
876 /* Set Operand[0] to the value of the local/arg */
877
878 Status = AcpiDsMethodDataGetValue (
879 Operand[0]->Reference.Class,
880 Operand[0]->Reference.Value,
881 WalkState, &TempDesc);
882 if (ACPI_FAILURE (Status))
883 {
884 goto Cleanup;
885 }
886
887 /*
888 * Delete our reference to the input object and
889 * point to the object just retrieved
890 */
891 AcpiUtRemoveReference (Operand[0]);
892 Operand[0] = TempDesc;
893 break;
894
895 case ACPI_REFCLASS_REFOF:
896
897 /* Get the object to which the reference refers */
898
899 TempDesc = Operand[0]->Reference.Object;
900 AcpiUtRemoveReference (Operand[0]);
901 Operand[0] = TempDesc;
902 break;
903
904 default:
905
906 /* Must be an Index op - handled below */
907 break;
908 }
909 break;
910
911 case ACPI_TYPE_STRING:
912
913 break;
914
915 default:
916
917 Status = AE_AML_OPERAND_TYPE;
918 goto Cleanup;
919 }
920 }
921
922 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED)
923 {
924 if ((Operand[0])->Common.Type == ACPI_TYPE_STRING)
925 {
926 /*
927 * This is a DerefOf (String). The string is a reference
928 * to a named ACPI object.
929 *
930 * 1) Find the owning Node
931 * 2) Dereference the node to an actual object. Could be a
932 * Field, so we need to resolve the node to a value.
933 */
934 Status = AcpiNsGetNode (WalkState->ScopeInfo->Scope.Node,
935 Operand[0]->String.Pointer,
936 ACPI_NS_SEARCH_PARENT,
937 ACPI_CAST_INDIRECT_PTR (
938 ACPI_NAMESPACE_NODE, &ReturnDesc));
939 if (ACPI_FAILURE (Status))
940 {
941 goto Cleanup;
942 }
943
944 Status = AcpiExResolveNodeToValue (
945 ACPI_CAST_INDIRECT_PTR (
946 ACPI_NAMESPACE_NODE, &ReturnDesc),
947 WalkState);
948 goto Cleanup;
949 }
950 }
951
952 /* Operand[0] may have changed from the code above */
953
954 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
955 {
956 /*
957 * This is a DerefOf (ObjectReference)
958 * Get the actual object from the Node (This is the dereference).
959 * This case may only happen when a LocalX or ArgX is
960 * dereferenced above.
961 */
962 ReturnDesc = AcpiNsGetAttachedObject (
963 (ACPI_NAMESPACE_NODE *) Operand[0]);
964 AcpiUtAddReference (ReturnDesc);
965 }
966 else
967 {
968 /*
969 * This must be a reference object produced by either the
970 * Index() or RefOf() operator
971 */
972 switch (Operand[0]->Reference.Class)
973 {
974 case ACPI_REFCLASS_INDEX:
975 /*
976 * The target type for the Index operator must be
977 * either a Buffer or a Package
978 */
979 switch (Operand[0]->Reference.TargetType)
980 {
981 case ACPI_TYPE_BUFFER_FIELD:
982
983 TempDesc = Operand[0]->Reference.Object;
984
985 /*
986 * Create a new object that contains one element of the
987 * buffer -- the element pointed to by the index.
988 *
989 * NOTE: index into a buffer is NOT a pointer to a
990 * sub-buffer of the main buffer, it is only a pointer to a
991 * single element (byte) of the buffer!
992 *
993 * Since we are returning the value of the buffer at the
994 * indexed location, we don't need to add an additional
995 * reference to the buffer itself.
996 */
997 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64)
998 TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]);
999 if (!ReturnDesc)
1000 {
1001 Status = AE_NO_MEMORY;
1002 goto Cleanup;
1003 }
1004 break;
1005
1006 case ACPI_TYPE_PACKAGE:
1007 /*
1008 * Return the referenced element of the package. We must
1009 * add another reference to the referenced object, however.
1010 */
1011 ReturnDesc = *(Operand[0]->Reference.Where);
1012 if (!ReturnDesc)
1013 {
1014 /*
1015 * Element is NULL, do not allow the dereference.
1016 * This provides compatibility with other ACPI
1017 * implementations.
1018 */
1019 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ELEMENT);
1020 }
1021
1022 AcpiUtAddReference (ReturnDesc);
1023 break;
1024
1025 default:
1026
1027 ACPI_ERROR ((AE_INFO,
1028 "Unknown Index TargetType 0x%X in reference object %p",
1029 Operand[0]->Reference.TargetType, Operand[0]));
1030 Status = AE_AML_OPERAND_TYPE;
1031 goto Cleanup;
1032 }
1033 break;
1034
1035 case ACPI_REFCLASS_REFOF:
1036
1037 ReturnDesc = Operand[0]->Reference.Object;
1038
1039 if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) ==
1040 ACPI_DESC_TYPE_NAMED)
1041 {
1042 ReturnDesc = AcpiNsGetAttachedObject (
1043 (ACPI_NAMESPACE_NODE *) ReturnDesc);
1044 if (!ReturnDesc)
1045 {
1046 break;
1047 }
1048
1049 /*
1050 * June 2013:
1051 * BufferFields/FieldUnits require additional resolution
1052 */
1053 switch (ReturnDesc->Common.Type)
1054 {
1055 case ACPI_TYPE_BUFFER_FIELD:
1056 case ACPI_TYPE_LOCAL_REGION_FIELD:
1057 case ACPI_TYPE_LOCAL_BANK_FIELD:
1058 case ACPI_TYPE_LOCAL_INDEX_FIELD:
1059
1060 Status = AcpiExReadDataFromField (WalkState,
1061 ReturnDesc, &TempDesc);
1062 if (ACPI_FAILURE (Status))
1063 {
1064 goto Cleanup;
1065 }
1066
1067 ReturnDesc = TempDesc;
1068 break;
1069
1070 default:
1071
1072 /* Add another reference to the object */
1073
1074 AcpiUtAddReference (ReturnDesc);
1075 break;
1076 }
1077 }
1078 break;
1079
1080 default:
1081
1082 ACPI_ERROR ((AE_INFO,
1083 "Unknown class in reference(%p) - 0x%2.2X",
1084 Operand[0], Operand[0]->Reference.Class));
1085
1086 Status = AE_TYPE;
1087 goto Cleanup;
1088 }
1089 }
1090 break;
1091
1092 default:
1093
1094 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
1095 WalkState->Opcode));
1096 Status = AE_AML_BAD_OPCODE;
1097 goto Cleanup;
1098 }
1099
1100
1101 Cleanup:
1102
1103 /* Delete return object on error */
1104
1105 if (ACPI_FAILURE (Status))
1106 {
1107 AcpiUtRemoveReference (ReturnDesc);
1108 }
1109
1110 /* Save return object on success */
1111
1112 else
1113 {
1114 WalkState->ResultObj = ReturnDesc;
1115 }
1116
1117 return_ACPI_STATUS (Status);
1118 }