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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / drivers / acpi / acpica / dsopcode.c
blob0c3b4dd60e8a5ae9bfdcb2713a33ee8455d1daec
1 /******************************************************************************
2 *
3 * Module Name: dsopcode - Dispatcher Op Region support and handling of
4 * "control" opcodes
5 *
6 *****************************************************************************/
7
8 /*
9 * Copyright (C) 2000 - 2008, 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 #include <acpi/acpi.h>
46 #include "accommon.h"
47 #include "acparser.h"
48 #include "amlcode.h"
49 #include "acdispat.h"
50 #include "acinterp.h"
51 #include "acnamesp.h"
52 #include "acevents.h"
53 #include "actables.h"
54
55 #define _COMPONENT ACPI_DISPATCHER
56 ACPI_MODULE_NAME("dsopcode")
57
58 /* Local prototypes */
59 static acpi_status
60 acpi_ds_execute_arguments(struct acpi_namespace_node *node,
61 struct acpi_namespace_node *scope_node,
62 u32 aml_length, u8 * aml_start);
63
64 static acpi_status
65 acpi_ds_init_buffer_field(u16 aml_opcode,
66 union acpi_operand_object *obj_desc,
67 union acpi_operand_object *buffer_desc,
68 union acpi_operand_object *offset_desc,
69 union acpi_operand_object *length_desc,
70 union acpi_operand_object *result_desc);
71
72 /*******************************************************************************
73 *
74 * FUNCTION: acpi_ds_execute_arguments
75 *
76 * PARAMETERS: Node - Object NS node
77 * scope_node - Parent NS node
78 * aml_length - Length of executable AML
79 * aml_start - Pointer to the AML
80 *
81 * RETURN: Status.
82 *
83 * DESCRIPTION: Late (deferred) execution of region or field arguments
84 *
85 ******************************************************************************/
86
87 static acpi_status
88 acpi_ds_execute_arguments(struct acpi_namespace_node *node,
89 struct acpi_namespace_node *scope_node,
90 u32 aml_length, u8 * aml_start)
91 {
92 acpi_status status;
93 union acpi_parse_object *op;
94 struct acpi_walk_state *walk_state;
95
96 ACPI_FUNCTION_TRACE(ds_execute_arguments);
97
98 /*
99 * Allocate a new parser op to be the root of the parsed tree
100 */
101 op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
102 if (!op) {
103 return_ACPI_STATUS(AE_NO_MEMORY);
104 }
105
106 /* Save the Node for use in acpi_ps_parse_aml */
107
108 op->common.node = scope_node;
109
110 /* Create and initialize a new parser state */
111
112 walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
113 if (!walk_state) {
114 status = AE_NO_MEMORY;
115 goto cleanup;
116 }
117
118 status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
119 aml_length, NULL, ACPI_IMODE_LOAD_PASS1);
120 if (ACPI_FAILURE(status)) {
121 acpi_ds_delete_walk_state(walk_state);
122 goto cleanup;
123 }
124
125 /* Mark this parse as a deferred opcode */
126
127 walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP;
128 walk_state->deferred_node = node;
129
130 /* Pass1: Parse the entire declaration */
131
132 status = acpi_ps_parse_aml(walk_state);
133 if (ACPI_FAILURE(status)) {
134 goto cleanup;
135 }
136
137 /* Get and init the Op created above */
138
139 op->common.node = node;
140 acpi_ps_delete_parse_tree(op);
141
142 /* Evaluate the deferred arguments */
143
144 op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
145 if (!op) {
146 return_ACPI_STATUS(AE_NO_MEMORY);
147 }
148
149 op->common.node = scope_node;
150
151 /* Create and initialize a new parser state */
152
153 walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
154 if (!walk_state) {
155 status = AE_NO_MEMORY;
156 goto cleanup;
157 }
158
159 /* Execute the opcode and arguments */
160
161 status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
162 aml_length, NULL, ACPI_IMODE_EXECUTE);
163 if (ACPI_FAILURE(status)) {
164 acpi_ds_delete_walk_state(walk_state);
165 goto cleanup;
166 }
167
168 /* Mark this execution as a deferred opcode */
169
170 walk_state->deferred_node = node;
171 status = acpi_ps_parse_aml(walk_state);
172
173 cleanup:
174 acpi_ps_delete_parse_tree(op);
175 return_ACPI_STATUS(status);
176 }
177
178 /*******************************************************************************
179 *
180 * FUNCTION: acpi_ds_get_buffer_field_arguments
181 *
182 * PARAMETERS: obj_desc - A valid buffer_field object
183 *
184 * RETURN: Status.
185 *
186 * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late
187 * evaluation of these field attributes.
188 *
189 ******************************************************************************/
190
191 acpi_status
192 acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc)
193 {
194 union acpi_operand_object *extra_desc;
195 struct acpi_namespace_node *node;
196 acpi_status status;
197
198 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc);
199
200 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
201 return_ACPI_STATUS(AE_OK);
202 }
203
204 /* Get the AML pointer (method object) and buffer_field node */
205
206 extra_desc = acpi_ns_get_secondary_object(obj_desc);
207 node = obj_desc->buffer_field.node;
208
209 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
210 (ACPI_TYPE_BUFFER_FIELD, node, NULL));
211 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n",
212 acpi_ut_get_node_name(node)));
213
214 /* Execute the AML code for the term_arg arguments */
215
216 status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node),
217 extra_desc->extra.aml_length,
218 extra_desc->extra.aml_start);
219 return_ACPI_STATUS(status);
220 }
221
222 /*******************************************************************************
223 *
224 * FUNCTION: acpi_ds_get_bank_field_arguments
225 *
226 * PARAMETERS: obj_desc - A valid bank_field object
227 *
228 * RETURN: Status.
229 *
230 * DESCRIPTION: Get bank_field bank_value. This implements the late
231 * evaluation of these field attributes.
232 *
233 ******************************************************************************/
234
235 acpi_status
236 acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc)
237 {
238 union acpi_operand_object *extra_desc;
239 struct acpi_namespace_node *node;
240 acpi_status status;
241
242 ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc);
243
244 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
245 return_ACPI_STATUS(AE_OK);
246 }
247
248 /* Get the AML pointer (method object) and bank_field node */
249
250 extra_desc = acpi_ns_get_secondary_object(obj_desc);
251 node = obj_desc->bank_field.node;
252
253 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
254 (ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL));
255 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n",
256 acpi_ut_get_node_name(node)));
257
258 /* Execute the AML code for the term_arg arguments */
259
260 status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node),
261 extra_desc->extra.aml_length,
262 extra_desc->extra.aml_start);
263 return_ACPI_STATUS(status);
264 }
265
266 /*******************************************************************************
267 *
268 * FUNCTION: acpi_ds_get_buffer_arguments
269 *
270 * PARAMETERS: obj_desc - A valid Buffer object
271 *
272 * RETURN: Status.
273 *
274 * DESCRIPTION: Get Buffer length and initializer byte list. This implements
275 * the late evaluation of these attributes.
276 *
277 ******************************************************************************/
278
279 acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc)
280 {
281 struct acpi_namespace_node *node;
282 acpi_status status;
283
284 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc);
285
286 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
287 return_ACPI_STATUS(AE_OK);
288 }
289
290 /* Get the Buffer node */
291
292 node = obj_desc->buffer.node;
293 if (!node) {
294 ACPI_ERROR((AE_INFO,
295 "No pointer back to NS node in buffer obj %p",
296 obj_desc));
297 return_ACPI_STATUS(AE_AML_INTERNAL);
298 }
299
300 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n"));
301
302 /* Execute the AML code for the term_arg arguments */
303
304 status = acpi_ds_execute_arguments(node, node,
305 obj_desc->buffer.aml_length,
306 obj_desc->buffer.aml_start);
307 return_ACPI_STATUS(status);
308 }
309
310 /*******************************************************************************
311 *
312 * FUNCTION: acpi_ds_get_package_arguments
313 *
314 * PARAMETERS: obj_desc - A valid Package object
315 *
316 * RETURN: Status.
317 *
318 * DESCRIPTION: Get Package length and initializer byte list. This implements
319 * the late evaluation of these attributes.
320 *
321 ******************************************************************************/
322
323 acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc)
324 {
325 struct acpi_namespace_node *node;
326 acpi_status status;
327
328 ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc);
329
330 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
331 return_ACPI_STATUS(AE_OK);
332 }
333
334 /* Get the Package node */
335
336 node = obj_desc->package.node;
337 if (!node) {
338 ACPI_ERROR((AE_INFO,
339 "No pointer back to NS node in package %p",
340 obj_desc));
341 return_ACPI_STATUS(AE_AML_INTERNAL);
342 }
343
344 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n"));
345
346 /* Execute the AML code for the term_arg arguments */
347
348 status = acpi_ds_execute_arguments(node, node,
349 obj_desc->package.aml_length,
350 obj_desc->package.aml_start);
351 return_ACPI_STATUS(status);
352 }
353
354 /*****************************************************************************
355 *
356 * FUNCTION: acpi_ds_get_region_arguments
357 *
358 * PARAMETERS: obj_desc - A valid region object
359 *
360 * RETURN: Status.
361 *
362 * DESCRIPTION: Get region address and length. This implements the late
363 * evaluation of these region attributes.
364 *
365 ****************************************************************************/
366
367 acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc)
368 {
369 struct acpi_namespace_node *node;
370 acpi_status status;
371 union acpi_operand_object *extra_desc;
372
373 ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc);
374
375 if (obj_desc->region.flags & AOPOBJ_DATA_VALID) {
376 return_ACPI_STATUS(AE_OK);
377 }
378
379 extra_desc = acpi_ns_get_secondary_object(obj_desc);
380 if (!extra_desc) {
381 return_ACPI_STATUS(AE_NOT_EXIST);
382 }
383
384 /* Get the Region node */
385
386 node = obj_desc->region.node;
387
388 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
389 (ACPI_TYPE_REGION, node, NULL));
390
391 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n",
392 acpi_ut_get_node_name(node),
393 extra_desc->extra.aml_start));
394
395 /* Execute the argument AML */
396
397 status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node),
398 extra_desc->extra.aml_length,
399 extra_desc->extra.aml_start);
400 if (ACPI_FAILURE(status)) {
401 return_ACPI_STATUS(status);
402 }
403
404 /* Validate the region address/length via the host OS */
405
406 status = acpi_os_validate_address(obj_desc->region.space_id,
407 obj_desc->region.address,
408 (acpi_size) obj_desc->region.length,
409 acpi_ut_get_node_name(node));
410
411 if (ACPI_FAILURE(status)) {
412 /*
413 * Invalid address/length. We will emit an error message and mark
414 * the region as invalid, so that it will cause an additional error if
415 * it is ever used. Then return AE_OK.
416 */
417 ACPI_EXCEPTION((AE_INFO, status,
418 "During address validation of OpRegion [%4.4s]",
419 node->name.ascii));
420 obj_desc->common.flags |= AOPOBJ_INVALID;
421 status = AE_OK;
422 }
423
424 return_ACPI_STATUS(status);
425 }
426
427 /*******************************************************************************
428 *
429 * FUNCTION: acpi_ds_initialize_region
430 *
431 * PARAMETERS: obj_handle - Region namespace node
432 *
433 * RETURN: Status
434 *
435 * DESCRIPTION: Front end to ev_initialize_region
436 *
437 ******************************************************************************/
438
439 acpi_status acpi_ds_initialize_region(acpi_handle obj_handle)
440 {
441 union acpi_operand_object *obj_desc;
442 acpi_status status;
443
444 obj_desc = acpi_ns_get_attached_object(obj_handle);
445
446 /* Namespace is NOT locked */
447
448 status = acpi_ev_initialize_region(obj_desc, FALSE);
449 return (status);
450 }
451
452 /*******************************************************************************
453 *
454 * FUNCTION: acpi_ds_init_buffer_field
455 *
456 * PARAMETERS: aml_opcode - create_xxx_field
457 * obj_desc - buffer_field object
458 * buffer_desc - Host Buffer
459 * offset_desc - Offset into buffer
460 * length_desc - Length of field (CREATE_FIELD_OP only)
461 * result_desc - Where to store the result
462 *
463 * RETURN: Status
464 *
465 * DESCRIPTION: Perform actual initialization of a buffer field
466 *
467 ******************************************************************************/
468
469 static acpi_status
470 acpi_ds_init_buffer_field(u16 aml_opcode,
471 union acpi_operand_object *obj_desc,
472 union acpi_operand_object *buffer_desc,
473 union acpi_operand_object *offset_desc,
474 union acpi_operand_object *length_desc,
475 union acpi_operand_object *result_desc)
476 {
477 u32 offset;
478 u32 bit_offset;
479 u32 bit_count;
480 u8 field_flags;
481 acpi_status status;
482
483 ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc);
484
485 /* Host object must be a Buffer */
486
487 if (ACPI_GET_OBJECT_TYPE(buffer_desc) != ACPI_TYPE_BUFFER) {
488 ACPI_ERROR((AE_INFO,
489 "Target of Create Field is not a Buffer object - %s",
490 acpi_ut_get_object_type_name(buffer_desc)));
491
492 status = AE_AML_OPERAND_TYPE;
493 goto cleanup;
494 }
495
496 /*
497 * The last parameter to all of these opcodes (result_desc) started
498 * out as a name_string, and should therefore now be a NS node
499 * after resolution in acpi_ex_resolve_operands().
500 */
501 if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) {
502 ACPI_ERROR((AE_INFO,
503 "(%s) destination not a NS Node [%s]",
504 acpi_ps_get_opcode_name(aml_opcode),
505 acpi_ut_get_descriptor_name(result_desc)));
506
507 status = AE_AML_OPERAND_TYPE;
508 goto cleanup;
509 }
510
511 offset = (u32) offset_desc->integer.value;
512
513 /*
514 * Setup the Bit offsets and counts, according to the opcode
515 */
516 switch (aml_opcode) {
517 case AML_CREATE_FIELD_OP:
518
519 /* Offset is in bits, count is in bits */
520
521 field_flags = AML_FIELD_ACCESS_BYTE;
522 bit_offset = offset;
523 bit_count = (u32) length_desc->integer.value;
524
525 /* Must have a valid (>0) bit count */
526
527 if (bit_count == 0) {
528 ACPI_ERROR((AE_INFO,
529 "Attempt to CreateField of length zero"));
530 status = AE_AML_OPERAND_VALUE;
531 goto cleanup;
532 }
533 break;
534
535 case AML_CREATE_BIT_FIELD_OP:
536
537 /* Offset is in bits, Field is one bit */
538
539 bit_offset = offset;
540 bit_count = 1;
541 field_flags = AML_FIELD_ACCESS_BYTE;
542 break;
543
544 case AML_CREATE_BYTE_FIELD_OP:
545
546 /* Offset is in bytes, field is one byte */
547
548 bit_offset = 8 * offset;
549 bit_count = 8;
550 field_flags = AML_FIELD_ACCESS_BYTE;
551 break;
552
553 case AML_CREATE_WORD_FIELD_OP:
554
555 /* Offset is in bytes, field is one word */
556
557 bit_offset = 8 * offset;
558 bit_count = 16;
559 field_flags = AML_FIELD_ACCESS_WORD;
560 break;
561
562 case AML_CREATE_DWORD_FIELD_OP:
563
564 /* Offset is in bytes, field is one dword */
565
566 bit_offset = 8 * offset;
567 bit_count = 32;
568 field_flags = AML_FIELD_ACCESS_DWORD;
569 break;
570
571 case AML_CREATE_QWORD_FIELD_OP:
572
573 /* Offset is in bytes, field is one qword */
574
575 bit_offset = 8 * offset;
576 bit_count = 64;
577 field_flags = AML_FIELD_ACCESS_QWORD;
578 break;
579
580 default:
581
582 ACPI_ERROR((AE_INFO,
583 "Unknown field creation opcode %02x", aml_opcode));
584 status = AE_AML_BAD_OPCODE;
585 goto cleanup;
586 }
587
588 /* Entire field must fit within the current length of the buffer */
589
590 if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) {
591 ACPI_ERROR((AE_INFO,
592 "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)",
593 acpi_ut_get_node_name(result_desc),
594 bit_offset + bit_count,
595 acpi_ut_get_node_name(buffer_desc->buffer.node),
596 8 * (u32) buffer_desc->buffer.length));
597 status = AE_AML_BUFFER_LIMIT;
598 goto cleanup;
599 }
600
601 /*
602 * Initialize areas of the field object that are common to all fields
603 * For field_flags, use LOCK_RULE = 0 (NO_LOCK),
604 * UPDATE_RULE = 0 (UPDATE_PRESERVE)
605 */
606 status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,
607 bit_offset, bit_count);
608 if (ACPI_FAILURE(status)) {
609 goto cleanup;
610 }
611
612 obj_desc->buffer_field.buffer_obj = buffer_desc;
613
614 /* Reference count for buffer_desc inherits obj_desc count */
615
616 buffer_desc->common.reference_count = (u16)
617 (buffer_desc->common.reference_count +
618 obj_desc->common.reference_count);
619
620 cleanup:
621
622 /* Always delete the operands */
623
624 acpi_ut_remove_reference(offset_desc);
625 acpi_ut_remove_reference(buffer_desc);
626
627 if (aml_opcode == AML_CREATE_FIELD_OP) {
628 acpi_ut_remove_reference(length_desc);
629 }
630
631 /* On failure, delete the result descriptor */
632
633 if (ACPI_FAILURE(status)) {
634 acpi_ut_remove_reference(result_desc); /* Result descriptor */
635 } else {
636 /* Now the address and length are valid for this buffer_field */
637
638 obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
639 }
640
641 return_ACPI_STATUS(status);
642 }
643
644 /*******************************************************************************
645 *
646 * FUNCTION: acpi_ds_eval_buffer_field_operands
647 *
648 * PARAMETERS: walk_state - Current walk
649 * Op - A valid buffer_field Op object
650 *
651 * RETURN: Status
652 *
653 * DESCRIPTION: Get buffer_field Buffer and Index
654 * Called from acpi_ds_exec_end_op during buffer_field parse tree walk
655 *
656 ******************************************************************************/
657
658 acpi_status
659 acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
660 union acpi_parse_object *op)
661 {
662 acpi_status status;
663 union acpi_operand_object *obj_desc;
664 struct acpi_namespace_node *node;
665 union acpi_parse_object *next_op;
666
667 ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
668
669 /*
670 * This is where we evaluate the address and length fields of the
671 * create_xxx_field declaration
672 */
673 node = op->common.node;
674
675 /* next_op points to the op that holds the Buffer */
676
677 next_op = op->common.value.arg;
678
679 /* Evaluate/create the address and length operands */
680
681 status = acpi_ds_create_operands(walk_state, next_op);
682 if (ACPI_FAILURE(status)) {
683 return_ACPI_STATUS(status);
684 }
685
686 obj_desc = acpi_ns_get_attached_object(node);
687 if (!obj_desc) {
688 return_ACPI_STATUS(AE_NOT_EXIST);
689 }
690
691 /* Resolve the operands */
692
693 status = acpi_ex_resolve_operands(op->common.aml_opcode,
694 ACPI_WALK_OPERANDS, walk_state);
695 if (ACPI_FAILURE(status)) {
696 ACPI_ERROR((AE_INFO, "(%s) bad operand(s) (%X)",
697 acpi_ps_get_opcode_name(op->common.aml_opcode),
698 status));
699
700 return_ACPI_STATUS(status);
701 }
702
703 /* Initialize the Buffer Field */
704
705 if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
706
707 /* NOTE: Slightly different operands for this opcode */
708
709 status =
710 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
711 walk_state->operands[0],
712 walk_state->operands[1],
713 walk_state->operands[2],
714 walk_state->operands[3]);
715 } else {
716 /* All other, create_xxx_field opcodes */
717
718 status =
719 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
720 walk_state->operands[0],
721 walk_state->operands[1], NULL,
722 walk_state->operands[2]);
723 }
724
725 return_ACPI_STATUS(status);
726 }
727
728 /*******************************************************************************
729 *
730 * FUNCTION: acpi_ds_eval_region_operands
731 *
732 * PARAMETERS: walk_state - Current walk
733 * Op - A valid region Op object
734 *
735 * RETURN: Status
736 *
737 * DESCRIPTION: Get region address and length
738 * Called from acpi_ds_exec_end_op during op_region parse tree walk
739 *
740 ******************************************************************************/
741
742 acpi_status
743 acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
744 union acpi_parse_object *op)
745 {
746 acpi_status status;
747 union acpi_operand_object *obj_desc;
748 union acpi_operand_object *operand_desc;
749 struct acpi_namespace_node *node;
750 union acpi_parse_object *next_op;
751
752 ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
753
754 /*
755 * This is where we evaluate the address and length fields of the
756 * op_region declaration
757 */
758 node = op->common.node;
759
760 /* next_op points to the op that holds the space_iD */
761
762 next_op = op->common.value.arg;
763
764 /* next_op points to address op */
765
766 next_op = next_op->common.next;
767
768 /* Evaluate/create the address and length operands */
769
770 status = acpi_ds_create_operands(walk_state, next_op);
771 if (ACPI_FAILURE(status)) {
772 return_ACPI_STATUS(status);
773 }
774
775 /* Resolve the length and address operands to numbers */
776
777 status = acpi_ex_resolve_operands(op->common.aml_opcode,
778 ACPI_WALK_OPERANDS, walk_state);
779 if (ACPI_FAILURE(status)) {
780 return_ACPI_STATUS(status);
781 }
782
783 obj_desc = acpi_ns_get_attached_object(node);
784 if (!obj_desc) {
785 return_ACPI_STATUS(AE_NOT_EXIST);
786 }
787
788 /*
789 * Get the length operand and save it
790 * (at Top of stack)
791 */
792 operand_desc = walk_state->operands[walk_state->num_operands - 1];
793
794 obj_desc->region.length = (u32) operand_desc->integer.value;
795 acpi_ut_remove_reference(operand_desc);
796
797 /*
798 * Get the address and save it
799 * (at top of stack - 1)
800 */
801 operand_desc = walk_state->operands[walk_state->num_operands - 2];
802
803 obj_desc->region.address = (acpi_physical_address)
804 operand_desc->integer.value;
805 acpi_ut_remove_reference(operand_desc);
806
807 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
808 obj_desc,
809 ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address),
810 obj_desc->region.length));
811
812 /* Now the address and length are valid for this opregion */
813
814 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
815
816 return_ACPI_STATUS(status);
817 }
818
819 /*******************************************************************************
820 *
821 * FUNCTION: acpi_ds_eval_table_region_operands
822 *
823 * PARAMETERS: walk_state - Current walk
824 * Op - A valid region Op object
825 *
826 * RETURN: Status
827 *
828 * DESCRIPTION: Get region address and length
829 * Called from acpi_ds_exec_end_op during data_table_region parse tree walk
830 *
831 ******************************************************************************/
832
833 acpi_status
834 acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
835 union acpi_parse_object *op)
836 {
837 acpi_status status;
838 union acpi_operand_object *obj_desc;
839 union acpi_operand_object **operand;
840 struct acpi_namespace_node *node;
841 union acpi_parse_object *next_op;
842 u32 table_index;
843 struct acpi_table_header *table;
844
845 ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);
846
847 /*
848 * This is where we evaluate the signature_string and oem_iDString
849 * and oem_table_iDString of the data_table_region declaration
850 */
851 node = op->common.node;
852
853 /* next_op points to signature_string op */
854
855 next_op = op->common.value.arg;
856
857 /*
858 * Evaluate/create the signature_string and oem_iDString
859 * and oem_table_iDString operands
860 */
861 status = acpi_ds_create_operands(walk_state, next_op);
862 if (ACPI_FAILURE(status)) {
863 return_ACPI_STATUS(status);
864 }
865
866 /*
867 * Resolve the signature_string and oem_iDString
868 * and oem_table_iDString operands
869 */
870 status = acpi_ex_resolve_operands(op->common.aml_opcode,
871 ACPI_WALK_OPERANDS, walk_state);
872 if (ACPI_FAILURE(status)) {
873 return_ACPI_STATUS(status);
874 }
875
876 operand = &walk_state->operands[0];
877
878 /* Find the ACPI table */
879
880 status = acpi_tb_find_table(operand[0]->string.pointer,
881 operand[1]->string.pointer,
882 operand[2]->string.pointer, &table_index);
883 if (ACPI_FAILURE(status)) {
884 return_ACPI_STATUS(status);
885 }
886
887 acpi_ut_remove_reference(operand[0]);
888 acpi_ut_remove_reference(operand[1]);
889 acpi_ut_remove_reference(operand[2]);
890
891 status = acpi_get_table_by_index(table_index, &table);
892 if (ACPI_FAILURE(status)) {
893 return_ACPI_STATUS(status);
894 }
895
896 obj_desc = acpi_ns_get_attached_object(node);
897 if (!obj_desc) {
898 return_ACPI_STATUS(AE_NOT_EXIST);
899 }
900
901 obj_desc->region.address =
902 (acpi_physical_address) ACPI_TO_INTEGER(table);
903 obj_desc->region.length = table->length;
904
905 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
906 obj_desc,
907 ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address),
908 obj_desc->region.length));
909
910 /* Now the address and length are valid for this opregion */
911
912 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
913
914 return_ACPI_STATUS(status);
915 }
916
917 /*******************************************************************************
918 *
919 * FUNCTION: acpi_ds_eval_data_object_operands
920 *
921 * PARAMETERS: walk_state - Current walk
922 * Op - A valid data_object Op object
923 * obj_desc - data_object
924 *
925 * RETURN: Status
926 *
927 * DESCRIPTION: Get the operands and complete the following data object types:
928 * Buffer, Package.
929 *
930 ******************************************************************************/
931
932 acpi_status
933 acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
934 union acpi_parse_object *op,
935 union acpi_operand_object *obj_desc)
936 {
937 acpi_status status;
938 union acpi_operand_object *arg_desc;
939 u32 length;
940
941 ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);
942
943 /* The first operand (for all of these data objects) is the length */
944
945 /*
946 * Set proper index into operand stack for acpi_ds_obj_stack_push
947 * invoked inside acpi_ds_create_operand.
948 */
949 walk_state->operand_index = walk_state->num_operands;
950
951 status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
952 if (ACPI_FAILURE(status)) {
953 return_ACPI_STATUS(status);
954 }
955
956 status = acpi_ex_resolve_operands(walk_state->opcode,
957 &(walk_state->
958 operands[walk_state->num_operands -
959 1]), walk_state);
960 if (ACPI_FAILURE(status)) {
961 return_ACPI_STATUS(status);
962 }
963
964 /* Extract length operand */
965
966 arg_desc = walk_state->operands[walk_state->num_operands - 1];
967 length = (u32) arg_desc->integer.value;
968
969 /* Cleanup for length operand */
970
971 status = acpi_ds_obj_stack_pop(1, walk_state);
972 if (ACPI_FAILURE(status)) {
973 return_ACPI_STATUS(status);
974 }
975
976 acpi_ut_remove_reference(arg_desc);
977
978 /*
979 * Create the actual data object
980 */
981 switch (op->common.aml_opcode) {
982 case AML_BUFFER_OP:
983
984 status =
985 acpi_ds_build_internal_buffer_obj(walk_state, op, length,
986 &obj_desc);
987 break;
988
989 case AML_PACKAGE_OP:
990 case AML_VAR_PACKAGE_OP:
991
992 status =
993 acpi_ds_build_internal_package_obj(walk_state, op, length,
994 &obj_desc);
995 break;
996
997 default:
998 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
999 }
1000
1001 if (ACPI_SUCCESS(status)) {
1002 /*
1003 * Return the object in the walk_state, unless the parent is a package -
1004 * in this case, the return object will be stored in the parse tree
1005 * for the package.
1006 */
1007 if ((!op->common.parent) ||
1008 ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&
1009 (op->common.parent->common.aml_opcode !=
1010 AML_VAR_PACKAGE_OP)
1011 && (op->common.parent->common.aml_opcode != AML_NAME_OP))) {
1012 walk_state->result_obj = obj_desc;
1013 }
1014 }
1015
1016 return_ACPI_STATUS(status);
1017 }
1018
1019 /*******************************************************************************
1020 *
1021 * FUNCTION: acpi_ds_eval_bank_field_operands
1022 *
1023 * PARAMETERS: walk_state - Current walk
1024 * Op - A valid bank_field Op object
1025 *
1026 * RETURN: Status
1027 *
1028 * DESCRIPTION: Get bank_field bank_value
1029 * Called from acpi_ds_exec_end_op during bank_field parse tree walk
1030 *
1031 ******************************************************************************/
1032
1033 acpi_status
1034 acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state,
1035 union acpi_parse_object *op)
1036 {
1037 acpi_status status;
1038 union acpi_operand_object *obj_desc;
1039 union acpi_operand_object *operand_desc;
1040 struct acpi_namespace_node *node;
1041 union acpi_parse_object *next_op;
1042 union acpi_parse_object *arg;
1043
1044 ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);
1045
1046 /*
1047 * This is where we evaluate the bank_value field of the
1048 * bank_field declaration
1049 */
1050
1051 /* next_op points to the op that holds the Region */
1052
1053 next_op = op->common.value.arg;
1054
1055 /* next_op points to the op that holds the Bank Register */
1056
1057 next_op = next_op->common.next;
1058
1059 /* next_op points to the op that holds the Bank Value */
1060
1061 next_op = next_op->common.next;
1062
1063 /*
1064 * Set proper index into operand stack for acpi_ds_obj_stack_push
1065 * invoked inside acpi_ds_create_operand.
1066 *
1067 * We use walk_state->Operands[0] to store the evaluated bank_value
1068 */
1069 walk_state->operand_index = 0;
1070
1071 status = acpi_ds_create_operand(walk_state, next_op, 0);
1072 if (ACPI_FAILURE(status)) {
1073 return_ACPI_STATUS(status);
1074 }
1075
1076 status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);
1077 if (ACPI_FAILURE(status)) {
1078 return_ACPI_STATUS(status);
1079 }
1080
1081 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
1082 acpi_ps_get_opcode_name(op->common.aml_opcode), 1);
1083 /*
1084 * Get the bank_value operand and save it
1085 * (at Top of stack)
1086 */
1087 operand_desc = walk_state->operands[0];
1088
1089 /* Arg points to the start Bank Field */
1090
1091 arg = acpi_ps_get_arg(op, 4);
1092 while (arg) {
1093
1094 /* Ignore OFFSET and ACCESSAS terms here */
1095
1096 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
1097 node = arg->common.node;
1098
1099 obj_desc = acpi_ns_get_attached_object(node);
1100 if (!obj_desc) {
1101 return_ACPI_STATUS(AE_NOT_EXIST);
1102 }
1103
1104 obj_desc->bank_field.value =
1105 (u32) operand_desc->integer.value;
1106 }
1107
1108 /* Move to next field in the list */
1109
1110 arg = arg->common.next;
1111 }
1112
1113 acpi_ut_remove_reference(operand_desc);
1114 return_ACPI_STATUS(status);
1115 }
1116
1117 /*******************************************************************************
1118 *
1119 * FUNCTION: acpi_ds_exec_begin_control_op
1120 *
1121 * PARAMETERS: walk_list - The list that owns the walk stack
1122 * Op - The control Op
1123 *
1124 * RETURN: Status
1125 *
1126 * DESCRIPTION: Handles all control ops encountered during control method
1127 * execution.
1128 *
1129 ******************************************************************************/
1130
1131 acpi_status
1132 acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state,
1133 union acpi_parse_object *op)
1134 {
1135 acpi_status status = AE_OK;
1136 union acpi_generic_state *control_state;
1137
1138 ACPI_FUNCTION_NAME(ds_exec_begin_control_op);
1139
1140 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p Opcode=%2.2X State=%p\n", op,
1141 op->common.aml_opcode, walk_state));
1142
1143 switch (op->common.aml_opcode) {
1144 case AML_WHILE_OP:
1145
1146 /*
1147 * If this is an additional iteration of a while loop, continue.
1148 * There is no need to allocate a new control state.
1149 */
1150 if (walk_state->control_state) {
1151 if (walk_state->control_state->control.aml_predicate_start
1152 == (walk_state->parser_state.aml - 1)) {
1153
1154 /* Reset the state to start-of-loop */
1155
1156 walk_state->control_state->common.state =
1157 ACPI_CONTROL_CONDITIONAL_EXECUTING;
1158 break;
1159 }
1160 }
1161
1162 /*lint -fallthrough */
1163
1164 case AML_IF_OP:
1165
1166 /*
1167 * IF/WHILE: Create a new control state to manage these
1168 * constructs. We need to manage these as a stack, in order
1169 * to handle nesting.
1170 */
1171 control_state = acpi_ut_create_control_state();
1172 if (!control_state) {
1173 status = AE_NO_MEMORY;
1174 break;
1175 }
1176 /*
1177 * Save a pointer to the predicate for multiple executions
1178 * of a loop
1179 */
1180 control_state->control.aml_predicate_start =
1181 walk_state->parser_state.aml - 1;
1182 control_state->control.package_end =
1183 walk_state->parser_state.pkg_end;
1184 control_state->control.opcode = op->common.aml_opcode;
1185
1186 /* Push the control state on this walk's control stack */
1187
1188 acpi_ut_push_generic_state(&walk_state->control_state,
1189 control_state);
1190 break;
1191
1192 case AML_ELSE_OP:
1193
1194 /* Predicate is in the state object */
1195 /* If predicate is true, the IF was executed, ignore ELSE part */
1196
1197 if (walk_state->last_predicate) {
1198 status = AE_CTRL_TRUE;
1199 }
1200
1201 break;
1202
1203 case AML_RETURN_OP:
1204
1205 break;
1206
1207 default:
1208 break;
1209 }
1210
1211 return (status);
1212 }
1213
1214 /*******************************************************************************
1215 *
1216 * FUNCTION: acpi_ds_exec_end_control_op
1217 *
1218 * PARAMETERS: walk_list - The list that owns the walk stack
1219 * Op - The control Op
1220 *
1221 * RETURN: Status
1222 *
1223 * DESCRIPTION: Handles all control ops encountered during control method
1224 * execution.
1225 *
1226 ******************************************************************************/
1227
1228 acpi_status
1229 acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state,
1230 union acpi_parse_object * op)
1231 {
1232 acpi_status status = AE_OK;
1233 union acpi_generic_state *control_state;
1234
1235 ACPI_FUNCTION_NAME(ds_exec_end_control_op);
1236
1237 switch (op->common.aml_opcode) {
1238 case AML_IF_OP:
1239
1240 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", op));
1241
1242 /*
1243 * Save the result of the predicate in case there is an
1244 * ELSE to come
1245 */
1246 walk_state->last_predicate =
1247 (u8) walk_state->control_state->common.value;
1248
1249 /*
1250 * Pop the control state that was created at the start
1251 * of the IF and free it
1252 */
1253 control_state =
1254 acpi_ut_pop_generic_state(&walk_state->control_state);
1255 acpi_ut_delete_generic_state(control_state);
1256 break;
1257
1258 case AML_ELSE_OP:
1259
1260 break;
1261
1262 case AML_WHILE_OP:
1263
1264 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", op));
1265
1266 control_state = walk_state->control_state;
1267 if (control_state->common.value) {
1268
1269 /* Predicate was true, the body of the loop was just executed */
1270
1271 /*
1272 * This loop counter mechanism allows the interpreter to escape
1273 * possibly infinite loops. This can occur in poorly written AML
1274 * when the hardware does not respond within a while loop and the
1275 * loop does not implement a timeout.
1276 */
1277 control_state->control.loop_count++;
1278 if (control_state->control.loop_count >
1279 ACPI_MAX_LOOP_ITERATIONS) {
1280 status = AE_AML_INFINITE_LOOP;
1281 break;
1282 }
1283
1284 /*
1285 * Go back and evaluate the predicate and maybe execute the loop
1286 * another time
1287 */
1288 status = AE_CTRL_PENDING;
1289 walk_state->aml_last_while =
1290 control_state->control.aml_predicate_start;
1291 break;
1292 }
1293
1294 /* Predicate was false, terminate this while loop */
1295
1296 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1297 "[WHILE_OP] termination! Op=%p\n", op));
1298
1299 /* Pop this control state and free it */
1300
1301 control_state =
1302 acpi_ut_pop_generic_state(&walk_state->control_state);
1303 acpi_ut_delete_generic_state(control_state);
1304 break;
1305
1306 case AML_RETURN_OP:
1307
1308 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1309 "[RETURN_OP] Op=%p Arg=%p\n", op,
1310 op->common.value.arg));
1311
1312 /*
1313 * One optional operand -- the return value
1314 * It can be either an immediate operand or a result that
1315 * has been bubbled up the tree
1316 */
1317 if (op->common.value.arg) {
1318
1319 /* Since we have a real Return(), delete any implicit return */
1320
1321 acpi_ds_clear_implicit_return(walk_state);
1322
1323 /* Return statement has an immediate operand */
1324
1325 status =
1326 acpi_ds_create_operands(walk_state,
1327 op->common.value.arg);
1328 if (ACPI_FAILURE(status)) {
1329 return (status);
1330 }
1331
1332 /*
1333 * If value being returned is a Reference (such as
1334 * an arg or local), resolve it now because it may
1335 * cease to exist at the end of the method.
1336 */
1337 status =
1338 acpi_ex_resolve_to_value(&walk_state->operands[0],
1339 walk_state);
1340 if (ACPI_FAILURE(status)) {
1341 return (status);
1342 }
1343
1344 /*
1345 * Get the return value and save as the last result
1346 * value. This is the only place where walk_state->return_desc
1347 * is set to anything other than zero!
1348 */
1349 walk_state->return_desc = walk_state->operands[0];
1350 } else if (walk_state->result_count) {
1351
1352 /* Since we have a real Return(), delete any implicit return */
1353
1354 acpi_ds_clear_implicit_return(walk_state);
1355
1356 /*
1357 * The return value has come from a previous calculation.
1358 *
1359 * If value being returned is a Reference (such as
1360 * an arg or local), resolve it now because it may
1361 * cease to exist at the end of the method.
1362 *
1363 * Allow references created by the Index operator to return unchanged.
1364 */
1365 if ((ACPI_GET_DESCRIPTOR_TYPE
1366 (walk_state->results->results.obj_desc[0]) ==
1367 ACPI_DESC_TYPE_OPERAND)
1368 &&
1369 (ACPI_GET_OBJECT_TYPE
1370 (walk_state->results->results.obj_desc[0]) ==
1371 ACPI_TYPE_LOCAL_REFERENCE)
1372 && ((walk_state->results->results.obj_desc[0])->
1373 reference.class != ACPI_REFCLASS_INDEX)) {
1374 status =
1375 acpi_ex_resolve_to_value(&walk_state->
1376 results->results.
1377 obj_desc[0],
1378 walk_state);
1379 if (ACPI_FAILURE(status)) {
1380 return (status);
1381 }
1382 }
1383
1384 walk_state->return_desc =
1385 walk_state->results->results.obj_desc[0];
1386 } else {
1387 /* No return operand */
1388
1389 if (walk_state->num_operands) {
1390 acpi_ut_remove_reference(walk_state->
1391 operands[0]);
1392 }
1393
1394 walk_state->operands[0] = NULL;
1395 walk_state->num_operands = 0;
1396 walk_state->return_desc = NULL;
1397 }
1398
1399 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1400 "Completed RETURN_OP State=%p, RetVal=%p\n",
1401 walk_state, walk_state->return_desc));
1402
1403 /* End the control method execution right now */
1404
1405 status = AE_CTRL_TERMINATE;
1406 break;
1407
1408 case AML_NOOP_OP:
1409
1410 /* Just do nothing! */
1411 break;
1412
1413 case AML_BREAK_POINT_OP:
1414
1415 /* Call up to the OS service layer to handle this */
1416
1417 status =
1418 acpi_os_signal(ACPI_SIGNAL_BREAKPOINT,
1419 "Executed AML Breakpoint opcode");
1420
1421 /* If and when it returns, all done. */
1422
1423 break;
1424
1425 case AML_BREAK_OP:
1426 case AML_CONTINUE_OP: /* ACPI 2.0 */
1427
1428 /* Pop and delete control states until we find a while */
1429
1430 while (walk_state->control_state &&
1431 (walk_state->control_state->control.opcode !=
1432 AML_WHILE_OP)) {
1433 control_state =
1434 acpi_ut_pop_generic_state(&walk_state->
1435 control_state);
1436 acpi_ut_delete_generic_state(control_state);
1437 }
1438
1439 /* No while found? */
1440
1441 if (!walk_state->control_state) {
1442 return (AE_AML_NO_WHILE);
1443 }
1444
1445 /* Was: walk_state->aml_last_while = walk_state->control_state->Control.aml_predicate_start; */
1446
1447 walk_state->aml_last_while =
1448 walk_state->control_state->control.package_end;
1449
1450 /* Return status depending on opcode */
1451
1452 if (op->common.aml_opcode == AML_BREAK_OP) {
1453 status = AE_CTRL_BREAK;
1454 } else {
1455 status = AE_CTRL_CONTINUE;
1456 }
1457 break;
1458
1459 default:
1460
1461 ACPI_ERROR((AE_INFO, "Unknown control opcode=%X Op=%p",
1462 op->common.aml_opcode, op));
1463
1464 status = AE_AML_BAD_OPCODE;
1465 break;
1466 }
1467
1468 return (status);
1469 }
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