1
2 /******************************************************************************
3 *
4 * Module Name: exoparg1 - AML execution - opcodes with 1 argument
5 *
6 *****************************************************************************/
7
8 /*
9 * Copyright (C) 2000 - 2011, Intel Corp.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45 #define __EXOPARG1_C__
46
47 #include "acpi.h"
48 #include "accommon.h"
49 #include "acparser.h"
50 #include "acdispat.h"
51 #include "acinterp.h"
52 #include "amlcode.h"
53 #include "acnamesp.h"
54
55
56 #define _COMPONENT ACPI_EXECUTER
57 ACPI_MODULE_NAME ("exoparg1")
58
59
60 /*!
61 * Naming convention for AML interpreter execution routines.
62 *
63 * The routines that begin execution of AML opcodes are named with a common
64 * convention based upon the number of arguments, the number of target operands,
65 * and whether or not a value is returned:
66 *
67 * AcpiExOpcode_xA_yT_zR
68 *
69 * Where:
70 *
71 * xA - ARGUMENTS: The number of arguments (input operands) that are
72 * required for this opcode type (0 through 6 args).
73 * yT - TARGETS: The number of targets (output operands) that are required
74 * for this opcode type (0, 1, or 2 targets).
75 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
76 * as the function return (0 or 1).
77 *
78 * The AcpiExOpcode* functions are called via the Dispatcher component with
79 * fully resolved operands.
80 !*/
81
82 /*******************************************************************************
83 *
84 * FUNCTION: AcpiExOpcode_0A_0T_1R
85 *
86 * PARAMETERS: WalkState - Current state (contains AML opcode)
87 *
88 * RETURN: Status
89 *
90 * DESCRIPTION: Execute operator with no operands, one return value
91 *
92 ******************************************************************************/
93
94 ACPI_STATUS
95 AcpiExOpcode_0A_0T_1R (
96 ACPI_WALK_STATE *WalkState)
97 {
98 ACPI_STATUS Status = AE_OK;
99 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
100
101
102 ACPI_FUNCTION_TRACE_STR (ExOpcode_0A_0T_1R,
103 AcpiPsGetOpcodeName (WalkState->Opcode));
104
105
106 /* Examine the AML opcode */
107
108 switch (WalkState->Opcode)
109 {
110 case AML_TIMER_OP: /* Timer () */
111
112 /* Create a return object of type Integer */
113
114 ReturnDesc = AcpiUtCreateIntegerObject (AcpiOsGetTimer ());
115 if (!ReturnDesc)
116 {
117 Status = AE_NO_MEMORY;
118 goto Cleanup;
119 }
120 break;
121
122 default: /* Unknown opcode */
123
124 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
125 WalkState->Opcode));
126 Status = AE_AML_BAD_OPCODE;
127 break;
128 }
129
130 Cleanup:
131
132 /* Delete return object on error */
133
134 if ((ACPI_FAILURE (Status)) || WalkState->ResultObj)
135 {
136 AcpiUtRemoveReference (ReturnDesc);
137 WalkState->ResultObj = NULL;
138 }
139 else
140 {
141 /* Save the return value */
142
143 WalkState->ResultObj = ReturnDesc;
144 }
145
146 return_ACPI_STATUS (Status);
147 }
148
149
150 /*******************************************************************************
151 *
152 * FUNCTION: AcpiExOpcode_1A_0T_0R
153 *
154 * PARAMETERS: WalkState - Current state (contains AML opcode)
155 *
156 * RETURN: Status
157 *
158 * DESCRIPTION: Execute Type 1 monadic operator with numeric operand on
159 * object stack
160 *
161 ******************************************************************************/
162
163 ACPI_STATUS
164 AcpiExOpcode_1A_0T_0R (
165 ACPI_WALK_STATE *WalkState)
166 {
167 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
168 ACPI_STATUS Status = AE_OK;
169
170
171 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_0R,
172 AcpiPsGetOpcodeName (WalkState->Opcode));
173
174
175 /* Examine the AML opcode */
176
177 switch (WalkState->Opcode)
178 {
179 case AML_RELEASE_OP: /* Release (MutexObject) */
180
181 Status = AcpiExReleaseMutex (Operand[0], WalkState);
182 break;
183
184
185 case AML_RESET_OP: /* Reset (EventObject) */
186
187 Status = AcpiExSystemResetEvent (Operand[0]);
188 break;
189
190
191 case AML_SIGNAL_OP: /* Signal (EventObject) */
192
193 Status = AcpiExSystemSignalEvent (Operand[0]);
194 break;
195
196
197 case AML_SLEEP_OP: /* Sleep (MsecTime) */
198
199 Status = AcpiExSystemDoSleep (Operand[0]->Integer.Value);
200 break;
201
202
203 case AML_STALL_OP: /* Stall (UsecTime) */
204
205 Status = AcpiExSystemDoStall ((UINT32) Operand[0]->Integer.Value);
206 break;
207
208
209 case AML_UNLOAD_OP: /* Unload (Handle) */
210
211 Status = AcpiExUnloadTable (Operand[0]);
212 break;
213
214
215 default: /* Unknown opcode */
216
217 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
218 WalkState->Opcode));
219 Status = AE_AML_BAD_OPCODE;
220 break;
221 }
222
223 return_ACPI_STATUS (Status);
224 }
225
226
227 /*******************************************************************************
228 *
229 * FUNCTION: AcpiExOpcode_1A_1T_0R
230 *
231 * PARAMETERS: WalkState - Current state (contains AML opcode)
232 *
233 * RETURN: Status
234 *
235 * DESCRIPTION: Execute opcode with one argument, one target, and no
236 * return value.
237 *
238 ******************************************************************************/
239
240 ACPI_STATUS
241 AcpiExOpcode_1A_1T_0R (
242 ACPI_WALK_STATE *WalkState)
243 {
244 ACPI_STATUS Status = AE_OK;
245 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
246
247
248 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_0R,
249 AcpiPsGetOpcodeName (WalkState->Opcode));
250
251
252 /* Examine the AML opcode */
253
254 switch (WalkState->Opcode)
255 {
256 case AML_LOAD_OP:
257
258 Status = AcpiExLoadOp (Operand[0], Operand[1], WalkState);
259 break;
260
261 default: /* Unknown opcode */
262
263 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
264 WalkState->Opcode));
265 Status = AE_AML_BAD_OPCODE;
266 goto Cleanup;
267 }
268
269
270 Cleanup:
271
272 return_ACPI_STATUS (Status);
273 }
274
275
276 /*******************************************************************************
277 *
278 * FUNCTION: AcpiExOpcode_1A_1T_1R
279 *
280 * PARAMETERS: WalkState - Current state (contains AML opcode)
281 *
282 * RETURN: Status
283 *
284 * DESCRIPTION: Execute opcode with one argument, one target, and a
285 * return value.
286 *
287 ******************************************************************************/
288
289 ACPI_STATUS
290 AcpiExOpcode_1A_1T_1R (
291 ACPI_WALK_STATE *WalkState)
292 {
293 ACPI_STATUS Status = AE_OK;
294 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
295 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
296 ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL;
297 UINT32 Temp32;
298 UINT32 i;
299 UINT64 PowerOfTen;
300 UINT64 Digit;
301
302
303 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_1R,
304 AcpiPsGetOpcodeName (WalkState->Opcode));
305
306
307 /* Examine the AML opcode */
308
309 switch (WalkState->Opcode)
310 {
311 case AML_BIT_NOT_OP:
312 case AML_FIND_SET_LEFT_BIT_OP:
313 case AML_FIND_SET_RIGHT_BIT_OP:
314 case AML_FROM_BCD_OP:
315 case AML_TO_BCD_OP:
316 case AML_COND_REF_OF_OP:
317
318 /* Create a return object of type Integer for these opcodes */
319
320 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
321 if (!ReturnDesc)
322 {
323 Status = AE_NO_MEMORY;
324 goto Cleanup;
325 }
326
327 switch (WalkState->Opcode)
328 {
329 case AML_BIT_NOT_OP: /* Not (Operand, Result) */
330
331 ReturnDesc->Integer.Value = ~Operand[0]->Integer.Value;
332 break;
333
334
335 case AML_FIND_SET_LEFT_BIT_OP: /* FindSetLeftBit (Operand, Result) */
336
337 ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
338
339 /*
340 * Acpi specification describes Integer type as a little
341 * endian unsigned value, so this boundary condition is valid.
342 */
343 for (Temp32 = 0; ReturnDesc->Integer.Value &&
344 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
345 {
346 ReturnDesc->Integer.Value >>= 1;
347 }
348
349 ReturnDesc->Integer.Value = Temp32;
350 break;
351
352
353 case AML_FIND_SET_RIGHT_BIT_OP: /* FindSetRightBit (Operand, Result) */
354
355 ReturnDesc->Integer.Value = Operand[0]->Integer.Value;
356
357 /*
358 * The Acpi specification describes Integer type as a little
359 * endian unsigned value, so this boundary condition is valid.
360 */
361 for (Temp32 = 0; ReturnDesc->Integer.Value &&
362 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32)
363 {
364 ReturnDesc->Integer.Value <<= 1;
365 }
366
367 /* Since the bit position is one-based, subtract from 33 (65) */
368
369 ReturnDesc->Integer.Value =
370 Temp32 == 0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - Temp32;
371 break;
372
373
374 case AML_FROM_BCD_OP: /* FromBcd (BCDValue, Result) */
375
376 /*
377 * The 64-bit ACPI integer can hold 16 4-bit BCD characters
378 * (if table is 32-bit, integer can hold 8 BCD characters)
379 * Convert each 4-bit BCD value
380 */
381 PowerOfTen = 1;
382 ReturnDesc->Integer.Value = 0;
383 Digit = Operand[0]->Integer.Value;
384
385 /* Convert each BCD digit (each is one nybble wide) */
386
387 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
388 {
389 /* Get the least significant 4-bit BCD digit */
390
391 Temp32 = ((UINT32) Digit) & 0xF;
392
393 /* Check the range of the digit */
394
395 if (Temp32 > 9)
396 {
397 ACPI_ERROR ((AE_INFO,
398 "BCD digit too large (not decimal): 0x%X",
399 Temp32));
400
401 Status = AE_AML_NUMERIC_OVERFLOW;
402 goto Cleanup;
403 }
404
405 /* Sum the digit into the result with the current power of 10 */
406
407 ReturnDesc->Integer.Value +=
408 (((UINT64) Temp32) * PowerOfTen);
409
410 /* Shift to next BCD digit */
411
412 Digit >>= 4;
413
414 /* Next power of 10 */
415
416 PowerOfTen *= 10;
417 }
418 break;
419
420
421 case AML_TO_BCD_OP: /* ToBcd (Operand, Result) */
422
423 ReturnDesc->Integer.Value = 0;
424 Digit = Operand[0]->Integer.Value;
425
426 /* Each BCD digit is one nybble wide */
427
428 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++)
429 {
430 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Temp32);
431
432 /*
433 * Insert the BCD digit that resides in the
434 * remainder from above
435 */
436 ReturnDesc->Integer.Value |=
437 (((UINT64) Temp32) << ACPI_MUL_4 (i));
438 }
439
440 /* Overflow if there is any data left in Digit */
441
442 if (Digit > 0)
443 {
444 ACPI_ERROR ((AE_INFO,
445 "Integer too large to convert to BCD: 0x%8.8X%8.8X",
446 ACPI_FORMAT_UINT64 (Operand[0]->Integer.Value)));
447 Status = AE_AML_NUMERIC_OVERFLOW;
448 goto Cleanup;
449 }
450 break;
451
452
453 case AML_COND_REF_OF_OP: /* CondRefOf (SourceObject, Result) */
454
455 /*
456 * This op is a little strange because the internal return value is
457 * different than the return value stored in the result descriptor
458 * (There are really two return values)
459 */
460 if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode)
461 {
462 /*
463 * This means that the object does not exist in the namespace,
464 * return FALSE
465 */
466 ReturnDesc->Integer.Value = 0;
467 goto Cleanup;
468 }
469
470 /* Get the object reference, store it, and remove our reference */
471
472 Status = AcpiExGetObjectReference (Operand[0],
473 &ReturnDesc2, WalkState);
474 if (ACPI_FAILURE (Status))
475 {
476 goto Cleanup;
477 }
478
479 Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState);
480 AcpiUtRemoveReference (ReturnDesc2);
481
482 /* The object exists in the namespace, return TRUE */
483
484 ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
485 goto Cleanup;
486
487
488 default:
489 /* No other opcodes get here */
490 break;
491 }
492 break;
493
494
495 case AML_STORE_OP: /* Store (Source, Target) */
496
497 /*
498 * A store operand is typically a number, string, buffer or lvalue
499 * Be careful about deleting the source object,
500 * since the object itself may have been stored.
501 */
502 Status = AcpiExStore (Operand[0], Operand[1], WalkState);
503 if (ACPI_FAILURE (Status))
504 {
505 return_ACPI_STATUS (Status);
506 }
507
508 /* It is possible that the Store already produced a return object */
509
510 if (!WalkState->ResultObj)
511 {
512 /*
513 * Normally, we would remove a reference on the Operand[0]
514 * parameter; But since it is being used as the internal return
515 * object (meaning we would normally increment it), the two
516 * cancel out, and we simply don't do anything.
517 */
518 WalkState->ResultObj = Operand[0];
519 WalkState->Operands[0] = NULL; /* Prevent deletion */
520 }
521 return_ACPI_STATUS (Status);
522
523
524 /*
525 * ACPI 2.0 Opcodes
526 */
527 case AML_COPY_OP: /* Copy (Source, Target) */
528
529 Status = AcpiUtCopyIobjectToIobject (Operand[0], &ReturnDesc,
530 WalkState);
531 break;
532
533
534 case AML_TO_DECSTRING_OP: /* ToDecimalString (Data, Result) */
535
536 Status = AcpiExConvertToString (Operand[0], &ReturnDesc,
537 ACPI_EXPLICIT_CONVERT_DECIMAL);
538 if (ReturnDesc == Operand[0])
539 {
540 /* No conversion performed, add ref to handle return value */
541 AcpiUtAddReference (ReturnDesc);
542 }
543 break;
544
545
546 case AML_TO_HEXSTRING_OP: /* ToHexString (Data, Result) */
547
548 Status = AcpiExConvertToString (Operand[0], &ReturnDesc,
549 ACPI_EXPLICIT_CONVERT_HEX);
550 if (ReturnDesc == Operand[0])
551 {
552 /* No conversion performed, add ref to handle return value */
553 AcpiUtAddReference (ReturnDesc);
554 }
555 break;
556
557
558 case AML_TO_BUFFER_OP: /* ToBuffer (Data, Result) */
559
560 Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc);
561 if (ReturnDesc == Operand[0])
562 {
563 /* No conversion performed, add ref to handle return value */
564 AcpiUtAddReference (ReturnDesc);
565 }
566 break;
567
568
569 case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */
570
571 Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc,
572 ACPI_ANY_BASE);
573 if (ReturnDesc == Operand[0])
574 {
575 /* No conversion performed, add ref to handle return value */
576 AcpiUtAddReference (ReturnDesc);
577 }
578 break;
579
580
581 case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */
582 case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */
583
584 /* These are two obsolete opcodes */
585
586 ACPI_ERROR ((AE_INFO,
587 "%s is obsolete and not implemented",
588 AcpiPsGetOpcodeName (WalkState->Opcode)));
589 Status = AE_SUPPORT;
590 goto Cleanup;
591
592
593 default: /* Unknown opcode */
594
595 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
596 WalkState->Opcode));
597 Status = AE_AML_BAD_OPCODE;
598 goto Cleanup;
599 }
600
601 if (ACPI_SUCCESS (Status))
602 {
603 /* Store the return value computed above into the target object */
604
605 Status = AcpiExStore (ReturnDesc, Operand[1], WalkState);
606 }
607
608
609 Cleanup:
610
611 /* Delete return object on error */
612
613 if (ACPI_FAILURE (Status))
614 {
615 AcpiUtRemoveReference (ReturnDesc);
616 }
617
618 /* Save return object on success */
619
620 else if (!WalkState->ResultObj)
621 {
622 WalkState->ResultObj = ReturnDesc;
623 }
624
625 return_ACPI_STATUS (Status);
626 }
627
628
629 /*******************************************************************************
630 *
631 * FUNCTION: AcpiExOpcode_1A_0T_1R
632 *
633 * PARAMETERS: WalkState - Current state (contains AML opcode)
634 *
635 * RETURN: Status
636 *
637 * DESCRIPTION: Execute opcode with one argument, no target, and a return value
638 *
639 ******************************************************************************/
640
641 ACPI_STATUS
642 AcpiExOpcode_1A_0T_1R (
643 ACPI_WALK_STATE *WalkState)
644 {
645 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
646 ACPI_OPERAND_OBJECT *TempDesc;
647 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
648 ACPI_STATUS Status = AE_OK;
649 UINT32 Type;
650 UINT64 Value;
651
652
653 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R,
654 AcpiPsGetOpcodeName (WalkState->Opcode));
655
656
657 /* Examine the AML opcode */
658
659 switch (WalkState->Opcode)
660 {
661 case AML_LNOT_OP: /* LNot (Operand) */
662
663 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0);
664 if (!ReturnDesc)
665 {
666 Status = AE_NO_MEMORY;
667 goto Cleanup;
668 }
669
670 /*
671 * Set result to ONES (TRUE) if Value == 0. Note:
672 * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above.
673 */
674 if (!Operand[0]->Integer.Value)
675 {
676 ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
677 }
678 break;
679
680
681 case AML_DECREMENT_OP: /* Decrement (Operand) */
682 case AML_INCREMENT_OP: /* Increment (Operand) */
683
684 /*
685 * Create a new integer. Can't just get the base integer and
686 * increment it because it may be an Arg or Field.
687 */
688 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
689 if (!ReturnDesc)
690 {
691 Status = AE_NO_MEMORY;
692 goto Cleanup;
693 }
694
695 /*
696 * Since we are expecting a Reference operand, it can be either a
697 * NS Node or an internal object.
698 */
699 TempDesc = Operand[0];
700 if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND)
701 {
702 /* Internal reference object - prevent deletion */
703
704 AcpiUtAddReference (TempDesc);
705 }
706
707 /*
708 * Convert the Reference operand to an Integer (This removes a
709 * reference on the Operand[0] object)
710 *
711 * NOTE: We use LNOT_OP here in order to force resolution of the
712 * reference operand to an actual integer.
713 */
714 Status = AcpiExResolveOperands (AML_LNOT_OP, &TempDesc, WalkState);
715 if (ACPI_FAILURE (Status))
716 {
717 ACPI_EXCEPTION ((AE_INFO, Status,
718 "While resolving operands for [%s]",
719 AcpiPsGetOpcodeName (WalkState->Opcode)));
720
721 goto Cleanup;
722 }
723
724 /*
725 * TempDesc is now guaranteed to be an Integer object --
726 * Perform the actual increment or decrement
727 */
728 if (WalkState->Opcode == AML_INCREMENT_OP)
729 {
730 ReturnDesc->Integer.Value = TempDesc->Integer.Value +1;
731 }
732 else
733 {
734 ReturnDesc->Integer.Value = TempDesc->Integer.Value -1;
735 }
736
737 /* Finished with this Integer object */
738
739 AcpiUtRemoveReference (TempDesc);
740
741 /*
742 * Store the result back (indirectly) through the original
743 * Reference object
744 */
745 Status = AcpiExStore (ReturnDesc, Operand[0], WalkState);
746 break;
747
748
749 case AML_TYPE_OP: /* ObjectType (SourceObject) */
750
751 /*
752 * Note: The operand is not resolved at this point because we want to
753 * get the associated object, not its value. For example, we don't
754 * want to resolve a FieldUnit to its value, we want the actual
755 * FieldUnit object.
756 */
757
758 /* Get the type of the base object */
759
760 Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL);
761 if (ACPI_FAILURE (Status))
762 {
763 goto Cleanup;
764 }
765
766 /* Allocate a descriptor to hold the type. */
767
768 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type);
769 if (!ReturnDesc)
770 {
771 Status = AE_NO_MEMORY;
772 goto Cleanup;
773 }
774 break;
775
776
777 case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */
778
779 /*
780 * Note: The operand is not resolved at this point because we want to
781 * get the associated object, not its value.
782 */
783
784 /* Get the base object */
785
786 Status = AcpiExResolveMultiple (WalkState,
787 Operand[0], &Type, &TempDesc);
788 if (ACPI_FAILURE (Status))
789 {
790 goto Cleanup;
791 }
792
793 /*
794 * The type of the base object must be integer, buffer, string, or
795 * package. All others are not supported.
796 *
797 * NOTE: Integer is not specifically supported by the ACPI spec,
798 * but is supported implicitly via implicit operand conversion.
799 * rather than bother with conversion, we just use the byte width
800 * global (4 or 8 bytes).
801 */
802 switch (Type)
803 {
804 case ACPI_TYPE_INTEGER:
805 Value = AcpiGbl_IntegerByteWidth;
806 break;
807
808 case ACPI_TYPE_STRING:
809 Value = TempDesc->String.Length;
810 break;
811
812 case ACPI_TYPE_BUFFER:
813
814 /* Buffer arguments may not be evaluated at this point */
815
816 Status = AcpiDsGetBufferArguments (TempDesc);
817 Value = TempDesc->Buffer.Length;
818 break;
819
820 case ACPI_TYPE_PACKAGE:
821
822 /* Package arguments may not be evaluated at this point */
823
824 Status = AcpiDsGetPackageArguments (TempDesc);
825 Value = TempDesc->Package.Count;
826 break;
827
828 default:
829 ACPI_ERROR ((AE_INFO,
830 "Operand must be Buffer/Integer/String/Package - found type %s",
831 AcpiUtGetTypeName (Type)));
832 Status = AE_AML_OPERAND_TYPE;
833 goto Cleanup;
834 }
835
836 if (ACPI_FAILURE (Status))
837 {
838 goto Cleanup;
839 }
840
841 /*
842 * Now that we have the size of the object, create a result
843 * object to hold the value
844 */
845 ReturnDesc = AcpiUtCreateIntegerObject (Value);
846 if (!ReturnDesc)
847 {
848 Status = AE_NO_MEMORY;
849 goto Cleanup;
850 }
851 break;
852
853
854 case AML_REF_OF_OP: /* RefOf (SourceObject) */
855
856 Status = AcpiExGetObjectReference (Operand[0], &ReturnDesc, WalkState);
857 if (ACPI_FAILURE (Status))
858 {
859 goto Cleanup;
860 }
861 break;
862
863
864 case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */
865
866 /* Check for a method local or argument, or standalone String */
867
868 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
869 {
870 TempDesc = AcpiNsGetAttachedObject (
871 (ACPI_NAMESPACE_NODE *) Operand[0]);
872 if (TempDesc &&
873 ((TempDesc->Common.Type == ACPI_TYPE_STRING) ||
874 (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE)))
875 {
876 Operand[0] = TempDesc;
877 AcpiUtAddReference (TempDesc);
878 }
879 else
880 {
881 Status = AE_AML_OPERAND_TYPE;
882 goto Cleanup;
883 }
884 }
885 else
886 {
887 switch ((Operand[0])->Common.Type)
888 {
889 case ACPI_TYPE_LOCAL_REFERENCE:
890 /*
891 * This is a DerefOf (LocalX | ArgX)
892 *
893 * Must resolve/dereference the local/arg reference first
894 */
895 switch (Operand[0]->Reference.Class)
896 {
897 case ACPI_REFCLASS_LOCAL:
898 case ACPI_REFCLASS_ARG:
899
900 /* Set Operand[0] to the value of the local/arg */
901
902 Status = AcpiDsMethodDataGetValue (
903 Operand[0]->Reference.Class,
904 Operand[0]->Reference.Value,
905 WalkState, &TempDesc);
906 if (ACPI_FAILURE (Status))
907 {
908 goto Cleanup;
909 }
910
911 /*
912 * Delete our reference to the input object and
913 * point to the object just retrieved
914 */
915 AcpiUtRemoveReference (Operand[0]);
916 Operand[0] = TempDesc;
917 break;
918
919 case ACPI_REFCLASS_REFOF:
920
921 /* Get the object to which the reference refers */
922
923 TempDesc = Operand[0]->Reference.Object;
924 AcpiUtRemoveReference (Operand[0]);
925 Operand[0] = TempDesc;
926 break;
927
928 default:
929
930 /* Must be an Index op - handled below */
931 break;
932 }
933 break;
934
935 case ACPI_TYPE_STRING:
936 break;
937
938 default:
939 Status = AE_AML_OPERAND_TYPE;
940 goto Cleanup;
941 }
942 }
943
944 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED)
945 {
946 if ((Operand[0])->Common.Type == ACPI_TYPE_STRING)
947 {
948 /*
949 * This is a DerefOf (String). The string is a reference
950 * to a named ACPI object.
951 *
952 * 1) Find the owning Node
953 * 2) Dereference the node to an actual object. Could be a
954 * Field, so we need to resolve the node to a value.
955 */
956 Status = AcpiNsGetNode (WalkState->ScopeInfo->Scope.Node,
957 Operand[0]->String.Pointer,
958 ACPI_NS_SEARCH_PARENT,
959 ACPI_CAST_INDIRECT_PTR (
960 ACPI_NAMESPACE_NODE, &ReturnDesc));
961 if (ACPI_FAILURE (Status))
962 {
963 goto Cleanup;
964 }
965
966 Status = AcpiExResolveNodeToValue (
967 ACPI_CAST_INDIRECT_PTR (
968 ACPI_NAMESPACE_NODE, &ReturnDesc),
969 WalkState);
970 goto Cleanup;
971 }
972 }
973
974 /* Operand[0] may have changed from the code above */
975
976 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED)
977 {
978 /*
979 * This is a DerefOf (ObjectReference)
980 * Get the actual object from the Node (This is the dereference).
981 * This case may only happen when a LocalX or ArgX is
982 * dereferenced above.
983 */
984 ReturnDesc = AcpiNsGetAttachedObject (
985 (ACPI_NAMESPACE_NODE *) Operand[0]);
986 AcpiUtAddReference (ReturnDesc);
987 }
988 else
989 {
990 /*
991 * This must be a reference object produced by either the
992 * Index() or RefOf() operator
993 */
994 switch (Operand[0]->Reference.Class)
995 {
996 case ACPI_REFCLASS_INDEX:
997
998 /*
999 * The target type for the Index operator must be
1000 * either a Buffer or a Package
1001 */
1002 switch (Operand[0]->Reference.TargetType)
1003 {
1004 case ACPI_TYPE_BUFFER_FIELD:
1005
1006 TempDesc = Operand[0]->Reference.Object;
1007
1008 /*
1009 * Create a new object that contains one element of the
1010 * buffer -- the element pointed to by the index.
1011 *
1012 * NOTE: index into a buffer is NOT a pointer to a
1013 * sub-buffer of the main buffer, it is only a pointer to a
1014 * single element (byte) of the buffer!
1015 *
1016 * Since we are returning the value of the buffer at the
1017 * indexed location, we don't need to add an additional
1018 * reference to the buffer itself.
1019 */
1020 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64)
1021 TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]);
1022 if (!ReturnDesc)
1023 {
1024 Status = AE_NO_MEMORY;
1025 goto Cleanup;
1026 }
1027 break;
1028
1029
1030 case ACPI_TYPE_PACKAGE:
1031
1032 /*
1033 * Return the referenced element of the package. We must
1034 * add another reference to the referenced object, however.
1035 */
1036 ReturnDesc = *(Operand[0]->Reference.Where);
1037 if (ReturnDesc)
1038 {
1039 AcpiUtAddReference (ReturnDesc);
1040 }
1041 break;
1042
1043
1044 default:
1045
1046 ACPI_ERROR ((AE_INFO,
1047 "Unknown Index TargetType 0x%X in reference object %p",
1048 Operand[0]->Reference.TargetType, Operand[0]));
1049 Status = AE_AML_OPERAND_TYPE;
1050 goto Cleanup;
1051 }
1052 break;
1053
1054
1055 case ACPI_REFCLASS_REFOF:
1056
1057 ReturnDesc = Operand[0]->Reference.Object;
1058
1059 if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) ==
1060 ACPI_DESC_TYPE_NAMED)
1061 {
1062 ReturnDesc = AcpiNsGetAttachedObject (
1063 (ACPI_NAMESPACE_NODE *) ReturnDesc);
1064 }
1065
1066 /* Add another reference to the object! */
1067
1068 AcpiUtAddReference (ReturnDesc);
1069 break;
1070
1071
1072 default:
1073 ACPI_ERROR ((AE_INFO,
1074 "Unknown class in reference(%p) - 0x%2.2X",
1075 Operand[0], Operand[0]->Reference.Class));
1076
1077 Status = AE_TYPE;
1078 goto Cleanup;
1079 }
1080 }
1081 break;
1082
1083
1084 default:
1085
1086 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
1087 WalkState->Opcode));
1088 Status = AE_AML_BAD_OPCODE;
1089 goto Cleanup;
1090 }
1091
1092
1093 Cleanup:
1094
1095 /* Delete return object on error */
1096
1097 if (ACPI_FAILURE (Status))
1098 {
1099 AcpiUtRemoveReference (ReturnDesc);
1100 }
1101
1102 /* Save return object on success */
1103
1104 else
1105 {
1106 WalkState->ResultObj = ReturnDesc;
1107 }
1108
1109 return_ACPI_STATUS (Status);
1110 }
1111