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Merge ../to-linus
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / executer / exoparg1.c
1
2 /******************************************************************************
3 *
4 * Module Name: exoparg1 - AML execution - opcodes with 1 argument
5 *
6 *****************************************************************************/
7
8 /*
9 * Copyright (C) 2000 - 2005, R. Byron Moore
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
46 #include <acpi/acpi.h>
47 #include <acpi/acparser.h>
48 #include <acpi/acdispat.h>
49 #include <acpi/acinterp.h>
50 #include <acpi/amlcode.h>
51 #include <acpi/acnamesp.h>
52
53
54 #define _COMPONENT ACPI_EXECUTER
55 ACPI_MODULE_NAME ("exoparg1")
56
57
58 /*!
59 * Naming convention for AML interpreter execution routines.
60 *
61 * The routines that begin execution of AML opcodes are named with a common
62 * convention based upon the number of arguments, the number of target operands,
63 * and whether or not a value is returned:
64 *
65 * AcpiExOpcode_xA_yT_zR
66 *
67 * Where:
68 *
69 * xA - ARGUMENTS: The number of arguments (input operands) that are
70 * required for this opcode type (0 through 6 args).
71 * yT - TARGETS: The number of targets (output operands) that are required
72 * for this opcode type (0, 1, or 2 targets).
73 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
74 * as the function return (0 or 1).
75 *
76 * The AcpiExOpcode* functions are called via the Dispatcher component with
77 * fully resolved operands.
78 !*/
79
80 /*******************************************************************************
81 *
82 * FUNCTION: acpi_ex_opcode_0A_0T_1R
83 *
84 * PARAMETERS: walk_state - Current state (contains AML opcode)
85 *
86 * RETURN: Status
87 *
88 * DESCRIPTION: Execute operator with no operands, one return value
89 *
90 ******************************************************************************/
91
92 acpi_status
93 acpi_ex_opcode_0A_0T_1R (
94 struct acpi_walk_state *walk_state)
95 {
96 acpi_status status = AE_OK;
97 union acpi_operand_object *return_desc = NULL;
98
99
100 ACPI_FUNCTION_TRACE_STR ("ex_opcode_0A_0T_1R",
101 acpi_ps_get_opcode_name (walk_state->opcode));
102
103
104 /* Examine the AML opcode */
105
106 switch (walk_state->opcode) {
107 case AML_TIMER_OP: /* Timer () */
108
109 /* Create a return object of type Integer */
110
111 return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
112 if (!return_desc) {
113 status = AE_NO_MEMORY;
114 goto cleanup;
115 }
116 #if ACPI_MACHINE_WIDTH != 16
117 return_desc->integer.value = acpi_os_get_timer ();
118 #endif
119 break;
120
121 default: /* Unknown opcode */
122
123 ACPI_REPORT_ERROR (("acpi_ex_opcode_0A_0T_1R: Unknown opcode %X\n",
124 walk_state->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)) || walk_state->result_obj) {
134 acpi_ut_remove_reference (return_desc);
135 }
136 else {
137 /* Save the return value */
138
139 walk_state->result_obj = return_desc;
140 }
141
142 return_ACPI_STATUS (status);
143 }
144
145
146 /*******************************************************************************
147 *
148 * FUNCTION: acpi_ex_opcode_1A_0T_0R
149 *
150 * PARAMETERS: walk_state - Current state (contains AML opcode)
151 *
152 * RETURN: Status
153 *
154 * DESCRIPTION: Execute Type 1 monadic operator with numeric operand on
155 * object stack
156 *
157 ******************************************************************************/
158
159 acpi_status
160 acpi_ex_opcode_1A_0T_0R (
161 struct acpi_walk_state *walk_state)
162 {
163 union acpi_operand_object **operand = &walk_state->operands[0];
164 acpi_status status = AE_OK;
165
166
167 ACPI_FUNCTION_TRACE_STR ("ex_opcode_1A_0T_0R",
168 acpi_ps_get_opcode_name (walk_state->opcode));
169
170
171 /* Examine the AML opcode */
172
173 switch (walk_state->opcode) {
174 case AML_RELEASE_OP: /* Release (mutex_object) */
175
176 status = acpi_ex_release_mutex (operand[0], walk_state);
177 break;
178
179
180 case AML_RESET_OP: /* Reset (event_object) */
181
182 status = acpi_ex_system_reset_event (operand[0]);
183 break;
184
185
186 case AML_SIGNAL_OP: /* Signal (event_object) */
187
188 status = acpi_ex_system_signal_event (operand[0]);
189 break;
190
191
192 case AML_SLEEP_OP: /* Sleep (msec_time) */
193
194 status = acpi_ex_system_do_suspend (operand[0]->integer.value);
195 break;
196
197
198 case AML_STALL_OP: /* Stall (usec_time) */
199
200 status = acpi_ex_system_do_stall ((u32) operand[0]->integer.value);
201 break;
202
203
204 case AML_UNLOAD_OP: /* Unload (Handle) */
205
206 status = acpi_ex_unload_table (operand[0]);
207 break;
208
209
210 default: /* Unknown opcode */
211
212 ACPI_REPORT_ERROR (("acpi_ex_opcode_1A_0T_0R: Unknown opcode %X\n",
213 walk_state->opcode));
214 status = AE_AML_BAD_OPCODE;
215 break;
216 }
217
218 return_ACPI_STATUS (status);
219 }
220
221
222 /*******************************************************************************
223 *
224 * FUNCTION: acpi_ex_opcode_1A_1T_0R
225 *
226 * PARAMETERS: walk_state - Current state (contains AML opcode)
227 *
228 * RETURN: Status
229 *
230 * DESCRIPTION: Execute opcode with one argument, one target, and no
231 * return value.
232 *
233 ******************************************************************************/
234
235 acpi_status
236 acpi_ex_opcode_1A_1T_0R (
237 struct acpi_walk_state *walk_state)
238 {
239 acpi_status status = AE_OK;
240 union acpi_operand_object **operand = &walk_state->operands[0];
241
242
243 ACPI_FUNCTION_TRACE_STR ("ex_opcode_1A_1T_0R",
244 acpi_ps_get_opcode_name (walk_state->opcode));
245
246
247 /* Examine the AML opcode */
248
249 switch (walk_state->opcode) {
250 case AML_LOAD_OP:
251
252 status = acpi_ex_load_op (operand[0], operand[1], walk_state);
253 break;
254
255 default: /* Unknown opcode */
256
257 ACPI_REPORT_ERROR (("acpi_ex_opcode_1A_1T_0R: Unknown opcode %X\n",
258 walk_state->opcode));
259 status = AE_AML_BAD_OPCODE;
260 goto cleanup;
261 }
262
263
264 cleanup:
265
266 return_ACPI_STATUS (status);
267 }
268
269
270 /*******************************************************************************
271 *
272 * FUNCTION: acpi_ex_opcode_1A_1T_1R
273 *
274 * PARAMETERS: walk_state - Current state (contains AML opcode)
275 *
276 * RETURN: Status
277 *
278 * DESCRIPTION: Execute opcode with one argument, one target, and a
279 * return value.
280 *
281 ******************************************************************************/
282
283 acpi_status
284 acpi_ex_opcode_1A_1T_1R (
285 struct acpi_walk_state *walk_state)
286 {
287 acpi_status status = AE_OK;
288 union acpi_operand_object **operand = &walk_state->operands[0];
289 union acpi_operand_object *return_desc = NULL;
290 union acpi_operand_object *return_desc2 = NULL;
291 u32 temp32;
292 u32 i;
293 acpi_integer power_of_ten;
294 acpi_integer digit;
295
296
297 ACPI_FUNCTION_TRACE_STR ("ex_opcode_1A_1T_1R",
298 acpi_ps_get_opcode_name (walk_state->opcode));
299
300
301 /* Examine the AML opcode */
302
303 switch (walk_state->opcode) {
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 return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
314 if (!return_desc) {
315 status = AE_NO_MEMORY;
316 goto cleanup;
317 }
318
319 switch (walk_state->opcode) {
320 case AML_BIT_NOT_OP: /* Not (Operand, Result) */
321
322 return_desc->integer.value = ~operand[0]->integer.value;
323 break;
324
325
326 case AML_FIND_SET_LEFT_BIT_OP: /* find_set_left_bit (Operand, Result) */
327
328 return_desc->integer.value = operand[0]->integer.value;
329
330 /*
331 * Acpi specification describes Integer type as a little
332 * endian unsigned value, so this boundary condition is valid.
333 */
334 for (temp32 = 0; return_desc->integer.value &&
335 temp32 < ACPI_INTEGER_BIT_SIZE; ++temp32) {
336 return_desc->integer.value >>= 1;
337 }
338
339 return_desc->integer.value = temp32;
340 break;
341
342
343 case AML_FIND_SET_RIGHT_BIT_OP: /* find_set_right_bit (Operand, Result) */
344
345 return_desc->integer.value = operand[0]->integer.value;
346
347 /*
348 * The Acpi specification describes Integer type as a little
349 * endian unsigned value, so this boundary condition is valid.
350 */
351 for (temp32 = 0; return_desc->integer.value &&
352 temp32 < ACPI_INTEGER_BIT_SIZE; ++temp32) {
353 return_desc->integer.value <<= 1;
354 }
355
356 /* Since the bit position is one-based, subtract from 33 (65) */
357
358 return_desc->integer.value = temp32 == 0 ? 0 :
359 (ACPI_INTEGER_BIT_SIZE + 1) - temp32;
360 break;
361
362
363 case AML_FROM_BCD_OP: /* from_bcd (BCDValue, Result) */
364
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 power_of_ten = 1;
371 return_desc->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 < acpi_gbl_integer_nybble_width) && (digit > 0); i++) {
377 /* Get the least significant 4-bit BCD digit */
378
379 temp32 = ((u32) digit) & 0xF;
380
381 /* Check the range of the digit */
382
383 if (temp32 > 9) {
384 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
385 "BCD digit too large (not decimal): 0x%X\n",
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 return_desc->integer.value += (((acpi_integer) temp32) *
395 power_of_ten);
396
397 /* Shift to next BCD digit */
398
399 digit >>= 4;
400
401 /* Next power of 10 */
402
403 power_of_ten *= 10;
404 }
405 break;
406
407
408 case AML_TO_BCD_OP: /* to_bcd (Operand, Result) */
409
410 return_desc->integer.value = 0;
411 digit = operand[0]->integer.value;
412
413 /* Each BCD digit is one nybble wide */
414
415 for (i = 0; (i < acpi_gbl_integer_nybble_width) && (digit > 0); i++) {
416 (void) acpi_ut_short_divide (digit, 10, &digit, &temp32);
417
418 /*
419 * Insert the BCD digit that resides in the
420 * remainder from above
421 */
422 return_desc->integer.value |= (((acpi_integer) temp32) <<
423 ACPI_MUL_4 (i));
424 }
425
426 /* Overflow if there is any data left in Digit */
427
428 if (digit > 0) {
429 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
430 "Integer too large to convert to BCD: %8.8X%8.8X\n",
431 ACPI_FORMAT_UINT64 (operand[0]->integer.value)));
432 status = AE_AML_NUMERIC_OVERFLOW;
433 goto cleanup;
434 }
435 break;
436
437
438 case AML_COND_REF_OF_OP: /* cond_ref_of (source_object, Result) */
439
440 /*
441 * This op is a little strange because the internal return value is
442 * different than the return value stored in the result descriptor
443 * (There are really two return values)
444 */
445 if ((struct acpi_namespace_node *) operand[0] == acpi_gbl_root_node) {
446 /*
447 * This means that the object does not exist in the namespace,
448 * return FALSE
449 */
450 return_desc->integer.value = 0;
451 goto cleanup;
452 }
453
454 /* Get the object reference, store it, and remove our reference */
455
456 status = acpi_ex_get_object_reference (operand[0],
457 &return_desc2, walk_state);
458 if (ACPI_FAILURE (status)) {
459 goto cleanup;
460 }
461
462 status = acpi_ex_store (return_desc2, operand[1], walk_state);
463 acpi_ut_remove_reference (return_desc2);
464
465 /* The object exists in the namespace, return TRUE */
466
467 return_desc->integer.value = ACPI_INTEGER_MAX;
468 goto cleanup;
469
470
471 default:
472 /* No other opcodes get here */
473 break;
474 }
475 break;
476
477
478 case AML_STORE_OP: /* Store (Source, Target) */
479
480 /*
481 * A store operand is typically a number, string, buffer or lvalue
482 * Be careful about deleting the source object,
483 * since the object itself may have been stored.
484 */
485 status = acpi_ex_store (operand[0], operand[1], walk_state);
486 if (ACPI_FAILURE (status)) {
487 return_ACPI_STATUS (status);
488 }
489
490 /* It is possible that the Store already produced a return object */
491
492 if (!walk_state->result_obj) {
493 /*
494 * Normally, we would remove a reference on the Operand[0]
495 * parameter; But since it is being used as the internal return
496 * object (meaning we would normally increment it), the two
497 * cancel out, and we simply don't do anything.
498 */
499 walk_state->result_obj = operand[0];
500 walk_state->operands[0] = NULL; /* Prevent deletion */
501 }
502 return_ACPI_STATUS (status);
503
504
505 /*
506 * ACPI 2.0 Opcodes
507 */
508 case AML_COPY_OP: /* Copy (Source, Target) */
509
510 status = acpi_ut_copy_iobject_to_iobject (operand[0], &return_desc,
511 walk_state);
512 break;
513
514
515 case AML_TO_DECSTRING_OP: /* to_decimal_string (Data, Result) */
516
517 status = acpi_ex_convert_to_string (operand[0], &return_desc,
518 ACPI_EXPLICIT_CONVERT_DECIMAL);
519 if (return_desc == operand[0]) {
520 /* No conversion performed, add ref to handle return value */
521 acpi_ut_add_reference (return_desc);
522 }
523 break;
524
525
526 case AML_TO_HEXSTRING_OP: /* to_hex_string (Data, Result) */
527
528 status = acpi_ex_convert_to_string (operand[0], &return_desc,
529 ACPI_EXPLICIT_CONVERT_HEX);
530 if (return_desc == operand[0]) {
531 /* No conversion performed, add ref to handle return value */
532 acpi_ut_add_reference (return_desc);
533 }
534 break;
535
536
537 case AML_TO_BUFFER_OP: /* to_buffer (Data, Result) */
538
539 status = acpi_ex_convert_to_buffer (operand[0], &return_desc);
540 if (return_desc == operand[0]) {
541 /* No conversion performed, add ref to handle return value */
542 acpi_ut_add_reference (return_desc);
543 }
544 break;
545
546
547 case AML_TO_INTEGER_OP: /* to_integer (Data, Result) */
548
549 status = acpi_ex_convert_to_integer (operand[0], &return_desc,
550 ACPI_ANY_BASE);
551 if (return_desc == operand[0]) {
552 /* No conversion performed, add ref to handle return value */
553 acpi_ut_add_reference (return_desc);
554 }
555 break;
556
557
558 case AML_SHIFT_LEFT_BIT_OP: /* shift_left_bit (Source, bit_num) */
559 case AML_SHIFT_RIGHT_BIT_OP: /* shift_right_bit (Source, bit_num) */
560
561 /* These are two obsolete opcodes */
562
563 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
564 "%s is obsolete and not implemented\n",
565 acpi_ps_get_opcode_name (walk_state->opcode)));
566 status = AE_SUPPORT;
567 goto cleanup;
568
569
570 default: /* Unknown opcode */
571
572 ACPI_REPORT_ERROR (("acpi_ex_opcode_1A_1T_1R: Unknown opcode %X\n",
573 walk_state->opcode));
574 status = AE_AML_BAD_OPCODE;
575 goto cleanup;
576 }
577
578 if (ACPI_SUCCESS (status)) {
579 /* Store the return value computed above into the target object */
580
581 status = acpi_ex_store (return_desc, operand[1], walk_state);
582 }
583
584
585 cleanup:
586
587 if (!walk_state->result_obj) {
588 walk_state->result_obj = return_desc;
589 }
590
591 /* Delete return object on error */
592
593 if (ACPI_FAILURE (status)) {
594 acpi_ut_remove_reference (return_desc);
595 }
596
597 return_ACPI_STATUS (status);
598 }
599
600
601 /*******************************************************************************
602 *
603 * FUNCTION: acpi_ex_opcode_1A_0T_1R
604 *
605 * PARAMETERS: walk_state - Current state (contains AML opcode)
606 *
607 * RETURN: Status
608 *
609 * DESCRIPTION: Execute opcode with one argument, no target, and a return value
610 *
611 ******************************************************************************/
612
613 acpi_status
614 acpi_ex_opcode_1A_0T_1R (
615 struct acpi_walk_state *walk_state)
616 {
617 union acpi_operand_object **operand = &walk_state->operands[0];
618 union acpi_operand_object *temp_desc;
619 union acpi_operand_object *return_desc = NULL;
620 acpi_status status = AE_OK;
621 u32 type;
622 acpi_integer value;
623
624
625 ACPI_FUNCTION_TRACE_STR ("ex_opcode_1A_0T_1R",
626 acpi_ps_get_opcode_name (walk_state->opcode));
627
628
629 /* Examine the AML opcode */
630
631 switch (walk_state->opcode) {
632 case AML_LNOT_OP: /* LNot (Operand) */
633
634 return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
635 if (!return_desc) {
636 status = AE_NO_MEMORY;
637 goto cleanup;
638 }
639
640 /*
641 * Set result to ONES (TRUE) if Value == 0. Note:
642 * return_desc->Integer.Value is initially == 0 (FALSE) from above.
643 */
644 if (!operand[0]->integer.value) {
645 return_desc->integer.value = ACPI_INTEGER_MAX;
646 }
647 break;
648
649
650 case AML_DECREMENT_OP: /* Decrement (Operand) */
651 case AML_INCREMENT_OP: /* Increment (Operand) */
652
653 /*
654 * Create a new integer. Can't just get the base integer and
655 * increment it because it may be an Arg or Field.
656 */
657 return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
658 if (!return_desc) {
659 status = AE_NO_MEMORY;
660 goto cleanup;
661 }
662
663 /*
664 * Since we are expecting a Reference operand, it can be either a
665 * NS Node or an internal object.
666 */
667 temp_desc = operand[0];
668 if (ACPI_GET_DESCRIPTOR_TYPE (temp_desc) == ACPI_DESC_TYPE_OPERAND) {
669 /* Internal reference object - prevent deletion */
670
671 acpi_ut_add_reference (temp_desc);
672 }
673
674 /*
675 * Convert the Reference operand to an Integer (This removes a
676 * reference on the Operand[0] object)
677 *
678 * NOTE: We use LNOT_OP here in order to force resolution of the
679 * reference operand to an actual integer.
680 */
681 status = acpi_ex_resolve_operands (AML_LNOT_OP, &temp_desc, walk_state);
682 if (ACPI_FAILURE (status)) {
683 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s: bad operand(s) %s\n",
684 acpi_ps_get_opcode_name (walk_state->opcode),
685 acpi_format_exception(status)));
686
687 goto cleanup;
688 }
689
690 /*
691 * temp_desc is now guaranteed to be an Integer object --
692 * Perform the actual increment or decrement
693 */
694 if (walk_state->opcode == AML_INCREMENT_OP) {
695 return_desc->integer.value = temp_desc->integer.value +1;
696 }
697 else {
698 return_desc->integer.value = temp_desc->integer.value -1;
699 }
700
701 /* Finished with this Integer object */
702
703 acpi_ut_remove_reference (temp_desc);
704
705 /*
706 * Store the result back (indirectly) through the original
707 * Reference object
708 */
709 status = acpi_ex_store (return_desc, operand[0], walk_state);
710 break;
711
712
713 case AML_TYPE_OP: /* object_type (source_object) */
714
715 /*
716 * Note: The operand is not resolved at this point because we want to
717 * get the associated object, not its value. For example, we don't
718 * want to resolve a field_unit to its value, we want the actual
719 * field_unit object.
720 */
721
722 /* Get the type of the base object */
723
724 status = acpi_ex_resolve_multiple (walk_state, operand[0], &type, NULL);
725 if (ACPI_FAILURE (status)) {
726 goto cleanup;
727 }
728 /* Allocate a descriptor to hold the type. */
729
730 return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
731 if (!return_desc) {
732 status = AE_NO_MEMORY;
733 goto cleanup;
734 }
735
736 return_desc->integer.value = type;
737 break;
738
739
740 case AML_SIZE_OF_OP: /* size_of (source_object) */
741
742 /*
743 * Note: The operand is not resolved at this point because we want to
744 * get the associated object, not its value.
745 */
746
747 /* Get the base object */
748
749 status = acpi_ex_resolve_multiple (walk_state,
750 operand[0], &type, &temp_desc);
751 if (ACPI_FAILURE (status)) {
752 goto cleanup;
753 }
754
755 /*
756 * The type of the base object must be integer, buffer, string, or
757 * package. All others are not supported.
758 *
759 * NOTE: Integer is not specifically supported by the ACPI spec,
760 * but is supported implicitly via implicit operand conversion.
761 * rather than bother with conversion, we just use the byte width
762 * global (4 or 8 bytes).
763 */
764 switch (type) {
765 case ACPI_TYPE_INTEGER:
766 value = acpi_gbl_integer_byte_width;
767 break;
768
769 case ACPI_TYPE_BUFFER:
770 value = temp_desc->buffer.length;
771 break;
772
773 case ACPI_TYPE_STRING:
774 value = temp_desc->string.length;
775 break;
776
777 case ACPI_TYPE_PACKAGE:
778 value = temp_desc->package.count;
779 break;
780
781 default:
782 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
783 "size_of - Operand is not Buf/Int/Str/Pkg - found type %s\n",
784 acpi_ut_get_type_name (type)));
785 status = AE_AML_OPERAND_TYPE;
786 goto cleanup;
787 }
788
789 /*
790 * Now that we have the size of the object, create a result
791 * object to hold the value
792 */
793 return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
794 if (!return_desc) {
795 status = AE_NO_MEMORY;
796 goto cleanup;
797 }
798
799 return_desc->integer.value = value;
800 break;
801
802
803 case AML_REF_OF_OP: /* ref_of (source_object) */
804
805 status = acpi_ex_get_object_reference (operand[0], &return_desc, walk_state);
806 if (ACPI_FAILURE (status)) {
807 goto cleanup;
808 }
809 break;
810
811
812 case AML_DEREF_OF_OP: /* deref_of (obj_reference | String) */
813
814 /* Check for a method local or argument, or standalone String */
815
816 if (ACPI_GET_DESCRIPTOR_TYPE (operand[0]) != ACPI_DESC_TYPE_NAMED) {
817 switch (ACPI_GET_OBJECT_TYPE (operand[0])) {
818 case ACPI_TYPE_LOCAL_REFERENCE:
819 /*
820 * This is a deref_of (local_x | arg_x)
821 *
822 * Must resolve/dereference the local/arg reference first
823 */
824 switch (operand[0]->reference.opcode) {
825 case AML_LOCAL_OP:
826 case AML_ARG_OP:
827
828 /* Set Operand[0] to the value of the local/arg */
829
830 status = acpi_ds_method_data_get_value (
831 operand[0]->reference.opcode,
832 operand[0]->reference.offset,
833 walk_state, &temp_desc);
834 if (ACPI_FAILURE (status)) {
835 goto cleanup;
836 }
837
838 /*
839 * Delete our reference to the input object and
840 * point to the object just retrieved
841 */
842 acpi_ut_remove_reference (operand[0]);
843 operand[0] = temp_desc;
844 break;
845
846 case AML_REF_OF_OP:
847
848 /* Get the object to which the reference refers */
849
850 temp_desc = operand[0]->reference.object;
851 acpi_ut_remove_reference (operand[0]);
852 operand[0] = temp_desc;
853 break;
854
855 default:
856
857 /* Must be an Index op - handled below */
858 break;
859 }
860 break;
861
862
863 case ACPI_TYPE_STRING:
864
865 /*
866 * This is a deref_of (String). The string is a reference
867 * to a named ACPI object.
868 *
869 * 1) Find the owning Node
870 * 2) Dereference the node to an actual object. Could be a
871 * Field, so we need to resolve the node to a value.
872 */
873 status = acpi_ns_get_node_by_path (operand[0]->string.pointer,
874 walk_state->scope_info->scope.node,
875 ACPI_NS_SEARCH_PARENT,
876 ACPI_CAST_INDIRECT_PTR (
877 struct acpi_namespace_node, &return_desc));
878 if (ACPI_FAILURE (status)) {
879 goto cleanup;
880 }
881
882 status = acpi_ex_resolve_node_to_value (
883 ACPI_CAST_INDIRECT_PTR (
884 struct acpi_namespace_node, &return_desc),
885 walk_state);
886 goto cleanup;
887
888
889 default:
890
891 status = AE_AML_OPERAND_TYPE;
892 goto cleanup;
893 }
894 }
895
896 /* Operand[0] may have changed from the code above */
897
898 if (ACPI_GET_DESCRIPTOR_TYPE (operand[0]) == ACPI_DESC_TYPE_NAMED) {
899 /*
900 * This is a deref_of (object_reference)
901 * Get the actual object from the Node (This is the dereference).
902 * This case may only happen when a local_x or arg_x is
903 * dereferenced above.
904 */
905 return_desc = acpi_ns_get_attached_object (
906 (struct acpi_namespace_node *) operand[0]);
907 acpi_ut_add_reference (return_desc);
908 }
909 else {
910 /*
911 * This must be a reference object produced by either the
912 * Index() or ref_of() operator
913 */
914 switch (operand[0]->reference.opcode) {
915 case AML_INDEX_OP:
916
917 /*
918 * The target type for the Index operator must be
919 * either a Buffer or a Package
920 */
921 switch (operand[0]->reference.target_type) {
922 case ACPI_TYPE_BUFFER_FIELD:
923
924 temp_desc = operand[0]->reference.object;
925
926 /*
927 * Create a new object that contains one element of the
928 * buffer -- the element pointed to by the index.
929 *
930 * NOTE: index into a buffer is NOT a pointer to a
931 * sub-buffer of the main buffer, it is only a pointer to a
932 * single element (byte) of the buffer!
933 */
934 return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER);
935 if (!return_desc) {
936 status = AE_NO_MEMORY;
937 goto cleanup;
938 }
939
940 /*
941 * Since we are returning the value of the buffer at the
942 * indexed location, we don't need to add an additional
943 * reference to the buffer itself.
944 */
945 return_desc->integer.value =
946 temp_desc->buffer.pointer[operand[0]->reference.offset];
947 break;
948
949
950 case ACPI_TYPE_PACKAGE:
951
952 /*
953 * Return the referenced element of the package. We must
954 * add another reference to the referenced object, however.
955 */
956 return_desc = *(operand[0]->reference.where);
957 if (return_desc) {
958 acpi_ut_add_reference (return_desc);
959 }
960
961 break;
962
963
964 default:
965
966 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
967 "Unknown Index target_type %X in obj %p\n",
968 operand[0]->reference.target_type, operand[0]));
969 status = AE_AML_OPERAND_TYPE;
970 goto cleanup;
971 }
972 break;
973
974
975 case AML_REF_OF_OP:
976
977 return_desc = operand[0]->reference.object;
978
979 if (ACPI_GET_DESCRIPTOR_TYPE (return_desc) ==
980 ACPI_DESC_TYPE_NAMED) {
981
982 return_desc = acpi_ns_get_attached_object (
983 (struct acpi_namespace_node *) return_desc);
984 }
985
986 /* Add another reference to the object! */
987
988 acpi_ut_add_reference (return_desc);
989 break;
990
991
992 default:
993 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
994 "Unknown opcode in ref(%p) - %X\n",
995 operand[0], operand[0]->reference.opcode));
996
997 status = AE_TYPE;
998 goto cleanup;
999 }
1000 }
1001 break;
1002
1003
1004 default:
1005
1006 ACPI_REPORT_ERROR (("acpi_ex_opcode_1A_0T_1R: Unknown opcode %X\n",
1007 walk_state->opcode));
1008 status = AE_AML_BAD_OPCODE;
1009 goto cleanup;
1010 }
1011
1012
1013 cleanup:
1014
1015 /* Delete return object on error */
1016
1017 if (ACPI_FAILURE (status)) {
1018 acpi_ut_remove_reference (return_desc);
1019 }
1020
1021 walk_state->result_obj = return_desc;
1022 return_ACPI_STATUS (status);
1023 }
1024
kernel source for telekom puls (alcatel/mediatek)