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ACPICA: Cleanup for internal Reference Object
[linux-2.6/mini2440.git] / drivers / acpi / dispatcher / dsopcode.c
blob69fae5905bb8219af26b0e0684ae22cedc1b84dc
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 <acpi/acparser.h>
47 #include <acpi/amlcode.h>
48 #include <acpi/acdispat.h>
49 #include <acpi/acinterp.h>
50 #include <acpi/acnamesp.h>
51 #include <acpi/acevents.h>
52 #include <acpi/actables.h>
53
54 #define _COMPONENT ACPI_DISPATCHER
55 ACPI_MODULE_NAME("dsopcode")
56
57 /* Local prototypes */
58 static acpi_status
59 acpi_ds_execute_arguments(struct acpi_namespace_node *node,
60 struct acpi_namespace_node *scope_node,
61 u32 aml_length, u8 * aml_start);
62
63 static acpi_status
64 acpi_ds_init_buffer_field(u16 aml_opcode,
65 union acpi_operand_object *obj_desc,
66 union acpi_operand_object *buffer_desc,
67 union acpi_operand_object *offset_desc,
68 union acpi_operand_object *length_desc,
69 union acpi_operand_object *result_desc);
70
71 /*******************************************************************************
72 *
73 * FUNCTION: acpi_ds_execute_arguments
74 *
75 * PARAMETERS: Node - Object NS node
76 * scope_node - Parent NS node
77 * aml_length - Length of executable AML
78 * aml_start - Pointer to the AML
79 *
80 * RETURN: Status.
81 *
82 * DESCRIPTION: Late (deferred) execution of region or field arguments
83 *
84 ******************************************************************************/
85
86 static acpi_status
87 acpi_ds_execute_arguments(struct acpi_namespace_node *node,
88 struct acpi_namespace_node *scope_node,
89 u32 aml_length, u8 * aml_start)
90 {
91 acpi_status status;
92 union acpi_parse_object *op;
93 struct acpi_walk_state *walk_state;
94
95 ACPI_FUNCTION_TRACE(ds_execute_arguments);
96
97 /*
98 * Allocate a new parser op to be the root of the parsed tree
99 */
100 op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
101 if (!op) {
102 return_ACPI_STATUS(AE_NO_MEMORY);
103 }
104
105 /* Save the Node for use in acpi_ps_parse_aml */
106
107 op->common.node = scope_node;
108
109 /* Create and initialize a new parser state */
110
111 walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
112 if (!walk_state) {
113 status = AE_NO_MEMORY;
114 goto cleanup;
115 }
116
117 status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
118 aml_length, NULL, ACPI_IMODE_LOAD_PASS1);
119 if (ACPI_FAILURE(status)) {
120 acpi_ds_delete_walk_state(walk_state);
121 goto cleanup;
122 }
123
124 /* Mark this parse as a deferred opcode */
125
126 walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP;
127 walk_state->deferred_node = node;
128
129 /* Pass1: Parse the entire declaration */
130
131 status = acpi_ps_parse_aml(walk_state);
132 if (ACPI_FAILURE(status)) {
133 goto cleanup;
134 }
135
136 /* Get and init the Op created above */
137
138 op->common.node = node;
139 acpi_ps_delete_parse_tree(op);
140
141 /* Evaluate the deferred arguments */
142
143 op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP);
144 if (!op) {
145 return_ACPI_STATUS(AE_NO_MEMORY);
146 }
147
148 op->common.node = scope_node;
149
150 /* Create and initialize a new parser state */
151
152 walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
153 if (!walk_state) {
154 status = AE_NO_MEMORY;
155 goto cleanup;
156 }
157
158 /* Execute the opcode and arguments */
159
160 status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
161 aml_length, NULL, ACPI_IMODE_EXECUTE);
162 if (ACPI_FAILURE(status)) {
163 acpi_ds_delete_walk_state(walk_state);
164 goto cleanup;
165 }
166
167 /* Mark this execution as a deferred opcode */
168
169 walk_state->deferred_node = node;
170 status = acpi_ps_parse_aml(walk_state);
171
172 cleanup:
173 acpi_ps_delete_parse_tree(op);
174 return_ACPI_STATUS(status);
175 }
176
177 /*******************************************************************************
178 *
179 * FUNCTION: acpi_ds_get_buffer_field_arguments
180 *
181 * PARAMETERS: obj_desc - A valid buffer_field object
182 *
183 * RETURN: Status.
184 *
185 * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late
186 * evaluation of these field attributes.
187 *
188 ******************************************************************************/
189
190 acpi_status
191 acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc)
192 {
193 union acpi_operand_object *extra_desc;
194 struct acpi_namespace_node *node;
195 acpi_status status;
196
197 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc);
198
199 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
200 return_ACPI_STATUS(AE_OK);
201 }
202
203 /* Get the AML pointer (method object) and buffer_field node */
204
205 extra_desc = acpi_ns_get_secondary_object(obj_desc);
206 node = obj_desc->buffer_field.node;
207
208 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
209 (ACPI_TYPE_BUFFER_FIELD, node, NULL));
210 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n",
211 acpi_ut_get_node_name(node)));
212
213 /* Execute the AML code for the term_arg arguments */
214
215 status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node),
216 extra_desc->extra.aml_length,
217 extra_desc->extra.aml_start);
218 return_ACPI_STATUS(status);
219 }
220
221 /*******************************************************************************
222 *
223 * FUNCTION: acpi_ds_get_bank_field_arguments
224 *
225 * PARAMETERS: obj_desc - A valid bank_field object
226 *
227 * RETURN: Status.
228 *
229 * DESCRIPTION: Get bank_field bank_value. This implements the late
230 * evaluation of these field attributes.
231 *
232 ******************************************************************************/
233
234 acpi_status
235 acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc)
236 {
237 union acpi_operand_object *extra_desc;
238 struct acpi_namespace_node *node;
239 acpi_status status;
240
241 ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc);
242
243 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
244 return_ACPI_STATUS(AE_OK);
245 }
246
247 /* Get the AML pointer (method object) and bank_field node */
248
249 extra_desc = acpi_ns_get_secondary_object(obj_desc);
250 node = obj_desc->bank_field.node;
251
252 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
253 (ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL));
254 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n",
255 acpi_ut_get_node_name(node)));
256
257 /* Execute the AML code for the term_arg arguments */
258
259 status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node),
260 extra_desc->extra.aml_length,
261 extra_desc->extra.aml_start);
262 return_ACPI_STATUS(status);
263 }
264
265 /*******************************************************************************
266 *
267 * FUNCTION: acpi_ds_get_buffer_arguments
268 *
269 * PARAMETERS: obj_desc - A valid Buffer object
270 *
271 * RETURN: Status.
272 *
273 * DESCRIPTION: Get Buffer length and initializer byte list. This implements
274 * the late evaluation of these attributes.
275 *
276 ******************************************************************************/
277
278 acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc)
279 {
280 struct acpi_namespace_node *node;
281 acpi_status status;
282
283 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc);
284
285 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
286 return_ACPI_STATUS(AE_OK);
287 }
288
289 /* Get the Buffer node */
290
291 node = obj_desc->buffer.node;
292 if (!node) {
293 ACPI_ERROR((AE_INFO,
294 "No pointer back to NS node in buffer obj %p",
295 obj_desc));
296 return_ACPI_STATUS(AE_AML_INTERNAL);
297 }
298
299 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n"));
300
301 /* Execute the AML code for the term_arg arguments */
302
303 status = acpi_ds_execute_arguments(node, node,
304 obj_desc->buffer.aml_length,
305 obj_desc->buffer.aml_start);
306 return_ACPI_STATUS(status);
307 }
308
309 /*******************************************************************************
310 *
311 * FUNCTION: acpi_ds_get_package_arguments
312 *
313 * PARAMETERS: obj_desc - A valid Package object
314 *
315 * RETURN: Status.
316 *
317 * DESCRIPTION: Get Package length and initializer byte list. This implements
318 * the late evaluation of these attributes.
319 *
320 ******************************************************************************/
321
322 acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc)
323 {
324 struct acpi_namespace_node *node;
325 acpi_status status;
326
327 ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc);
328
329 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
330 return_ACPI_STATUS(AE_OK);
331 }
332
333 /* Get the Package node */
334
335 node = obj_desc->package.node;
336 if (!node) {
337 ACPI_ERROR((AE_INFO,
338 "No pointer back to NS node in package %p",
339 obj_desc));
340 return_ACPI_STATUS(AE_AML_INTERNAL);
341 }
342
343 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n"));
344
345 /* Execute the AML code for the term_arg arguments */
346
347 status = acpi_ds_execute_arguments(node, node,
348 obj_desc->package.aml_length,
349 obj_desc->package.aml_start);
350 return_ACPI_STATUS(status);
351 }
352
353 /*****************************************************************************
354 *
355 * FUNCTION: acpi_ds_get_region_arguments
356 *
357 * PARAMETERS: obj_desc - A valid region object
358 *
359 * RETURN: Status.
360 *
361 * DESCRIPTION: Get region address and length. This implements the late
362 * evaluation of these region attributes.
363 *
364 ****************************************************************************/
365
366 acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc)
367 {
368 struct acpi_namespace_node *node;
369 acpi_status status;
370 union acpi_operand_object *extra_desc;
371
372 ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc);
373
374 if (obj_desc->region.flags & AOPOBJ_DATA_VALID) {
375 return_ACPI_STATUS(AE_OK);
376 }
377
378 extra_desc = acpi_ns_get_secondary_object(obj_desc);
379 if (!extra_desc) {
380 return_ACPI_STATUS(AE_NOT_EXIST);
381 }
382
383 /* Get the Region node */
384
385 node = obj_desc->region.node;
386
387 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
388 (ACPI_TYPE_REGION, node, NULL));
389
390 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n",
391 acpi_ut_get_node_name(node),
392 extra_desc->extra.aml_start));
393
394 /* Execute the argument AML */
395
396 status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node),
397 extra_desc->extra.aml_length,
398 extra_desc->extra.aml_start);
399 if (ACPI_FAILURE(status)) {
400 return_ACPI_STATUS(status);
401 }
402
403 /* Validate the region address/length via the host OS */
404
405 status = acpi_os_validate_address(obj_desc->region.space_id,
406 obj_desc->region.address,
407 (acpi_size) obj_desc->region.length,
408 acpi_ut_get_node_name(node));
409
410 if (ACPI_FAILURE(status)) {
411 /*
412 * Invalid address/length. We will emit an error message and mark
413 * the region as invalid, so that it will cause an additional error if
414 * it is ever used. Then return AE_OK.
415 */
416 ACPI_EXCEPTION((AE_INFO, status,
417 "During address validation of OpRegion [%4.4s]",
418 node->name.ascii));
419 obj_desc->common.flags |= AOPOBJ_INVALID;
420 status = AE_OK;
421 }
422
423 return_ACPI_STATUS(status);
424 }
425
426 /*******************************************************************************
427 *
428 * FUNCTION: acpi_ds_initialize_region
429 *
430 * PARAMETERS: obj_handle - Region namespace node
431 *
432 * RETURN: Status
433 *
434 * DESCRIPTION: Front end to ev_initialize_region
435 *
436 ******************************************************************************/
437
438 acpi_status acpi_ds_initialize_region(acpi_handle obj_handle)
439 {
440 union acpi_operand_object *obj_desc;
441 acpi_status status;
442
443 obj_desc = acpi_ns_get_attached_object(obj_handle);
444
445 /* Namespace is NOT locked */
446
447 status = acpi_ev_initialize_region(obj_desc, FALSE);
448 return (status);
449 }
450
451 /*******************************************************************************
452 *
453 * FUNCTION: acpi_ds_init_buffer_field
454 *
455 * PARAMETERS: aml_opcode - create_xxx_field
456 * obj_desc - buffer_field object
457 * buffer_desc - Host Buffer
458 * offset_desc - Offset into buffer
459 * length_desc - Length of field (CREATE_FIELD_OP only)
460 * result_desc - Where to store the result
461 *
462 * RETURN: Status
463 *
464 * DESCRIPTION: Perform actual initialization of a buffer field
465 *
466 ******************************************************************************/
467
468 static acpi_status
469 acpi_ds_init_buffer_field(u16 aml_opcode,
470 union acpi_operand_object *obj_desc,
471 union acpi_operand_object *buffer_desc,
472 union acpi_operand_object *offset_desc,
473 union acpi_operand_object *length_desc,
474 union acpi_operand_object *result_desc)
475 {
476 u32 offset;
477 u32 bit_offset;
478 u32 bit_count;
479 u8 field_flags;
480 acpi_status status;
481
482 ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc);
483
484 /* Host object must be a Buffer */
485
486 if (ACPI_GET_OBJECT_TYPE(buffer_desc) != ACPI_TYPE_BUFFER) {
487 ACPI_ERROR((AE_INFO,
488 "Target of Create Field is not a Buffer object - %s",
489 acpi_ut_get_object_type_name(buffer_desc)));
490
491 status = AE_AML_OPERAND_TYPE;
492 goto cleanup;
493 }
494
495 /*
496 * The last parameter to all of these opcodes (result_desc) started
497 * out as a name_string, and should therefore now be a NS node
498 * after resolution in acpi_ex_resolve_operands().
499 */
500 if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) {
501 ACPI_ERROR((AE_INFO,
502 "(%s) destination not a NS Node [%s]",
503 acpi_ps_get_opcode_name(aml_opcode),
504 acpi_ut_get_descriptor_name(result_desc)));
505
506 status = AE_AML_OPERAND_TYPE;
507 goto cleanup;
508 }
509
510 offset = (u32) offset_desc->integer.value;
511
512 /*
513 * Setup the Bit offsets and counts, according to the opcode
514 */
515 switch (aml_opcode) {
516 case AML_CREATE_FIELD_OP:
517
518 /* Offset is in bits, count is in bits */
519
520 field_flags = AML_FIELD_ACCESS_BYTE;
521 bit_offset = offset;
522 bit_count = (u32) length_desc->integer.value;
523
524 /* Must have a valid (>0) bit count */
525
526 if (bit_count == 0) {
527 ACPI_ERROR((AE_INFO,
528 "Attempt to CreateField of length zero"));
529 status = AE_AML_OPERAND_VALUE;
530 goto cleanup;
531 }
532 break;
533
534 case AML_CREATE_BIT_FIELD_OP:
535
536 /* Offset is in bits, Field is one bit */
537
538 bit_offset = offset;
539 bit_count = 1;
540 field_flags = AML_FIELD_ACCESS_BYTE;
541 break;
542
543 case AML_CREATE_BYTE_FIELD_OP:
544
545 /* Offset is in bytes, field is one byte */
546
547 bit_offset = 8 * offset;
548 bit_count = 8;
549 field_flags = AML_FIELD_ACCESS_BYTE;
550 break;
551
552 case AML_CREATE_WORD_FIELD_OP:
553
554 /* Offset is in bytes, field is one word */
555
556 bit_offset = 8 * offset;
557 bit_count = 16;
558 field_flags = AML_FIELD_ACCESS_WORD;
559 break;
560
561 case AML_CREATE_DWORD_FIELD_OP:
562
563 /* Offset is in bytes, field is one dword */
564
565 bit_offset = 8 * offset;
566 bit_count = 32;
567 field_flags = AML_FIELD_ACCESS_DWORD;
568 break;
569
570 case AML_CREATE_QWORD_FIELD_OP:
571
572 /* Offset is in bytes, field is one qword */
573
574 bit_offset = 8 * offset;
575 bit_count = 64;
576 field_flags = AML_FIELD_ACCESS_QWORD;
577 break;
578
579 default:
580
581 ACPI_ERROR((AE_INFO,
582 "Unknown field creation opcode %02x", aml_opcode));
583 status = AE_AML_BAD_OPCODE;
584 goto cleanup;
585 }
586
587 /* Entire field must fit within the current length of the buffer */
588
589 if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) {
590 ACPI_ERROR((AE_INFO,
591 "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)",
592 acpi_ut_get_node_name(result_desc),
593 bit_offset + bit_count,
594 acpi_ut_get_node_name(buffer_desc->buffer.node),
595 8 * (u32) buffer_desc->buffer.length));
596 status = AE_AML_BUFFER_LIMIT;
597 goto cleanup;
598 }
599
600 /*
601 * Initialize areas of the field object that are common to all fields
602 * For field_flags, use LOCK_RULE = 0 (NO_LOCK),
603 * UPDATE_RULE = 0 (UPDATE_PRESERVE)
604 */
605 status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,
606 bit_offset, bit_count);
607 if (ACPI_FAILURE(status)) {
608 goto cleanup;
609 }
610
611 obj_desc->buffer_field.buffer_obj = buffer_desc;
612
613 /* Reference count for buffer_desc inherits obj_desc count */
614
615 buffer_desc->common.reference_count = (u16)
616 (buffer_desc->common.reference_count +
617 obj_desc->common.reference_count);
618
619 cleanup:
620
621 /* Always delete the operands */
622
623 acpi_ut_remove_reference(offset_desc);
624 acpi_ut_remove_reference(buffer_desc);
625
626 if (aml_opcode == AML_CREATE_FIELD_OP) {
627 acpi_ut_remove_reference(length_desc);
628 }
629
630 /* On failure, delete the result descriptor */
631
632 if (ACPI_FAILURE(status)) {
633 acpi_ut_remove_reference(result_desc); /* Result descriptor */
634 } else {
635 /* Now the address and length are valid for this buffer_field */
636
637 obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
638 }
639
640 return_ACPI_STATUS(status);
641 }
642
643 /*******************************************************************************
644 *
645 * FUNCTION: acpi_ds_eval_buffer_field_operands
646 *
647 * PARAMETERS: walk_state - Current walk
648 * Op - A valid buffer_field Op object
649 *
650 * RETURN: Status
651 *
652 * DESCRIPTION: Get buffer_field Buffer and Index
653 * Called from acpi_ds_exec_end_op during buffer_field parse tree walk
654 *
655 ******************************************************************************/
656
657 acpi_status
658 acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
659 union acpi_parse_object *op)
660 {
661 acpi_status status;
662 union acpi_operand_object *obj_desc;
663 struct acpi_namespace_node *node;
664 union acpi_parse_object *next_op;
665
666 ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
667
668 /*
669 * This is where we evaluate the address and length fields of the
670 * create_xxx_field declaration
671 */
672 node = op->common.node;
673
674 /* next_op points to the op that holds the Buffer */
675
676 next_op = op->common.value.arg;
677
678 /* Evaluate/create the address and length operands */
679
680 status = acpi_ds_create_operands(walk_state, next_op);
681 if (ACPI_FAILURE(status)) {
682 return_ACPI_STATUS(status);
683 }
684
685 obj_desc = acpi_ns_get_attached_object(node);
686 if (!obj_desc) {
687 return_ACPI_STATUS(AE_NOT_EXIST);
688 }
689
690 /* Resolve the operands */
691
692 status = acpi_ex_resolve_operands(op->common.aml_opcode,
693 ACPI_WALK_OPERANDS, walk_state);
694 if (ACPI_FAILURE(status)) {
695 ACPI_ERROR((AE_INFO, "(%s) bad operand(s) (%X)",
696 acpi_ps_get_opcode_name(op->common.aml_opcode),
697 status));
698
699 return_ACPI_STATUS(status);
700 }
701
702 /* Initialize the Buffer Field */
703
704 if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
705
706 /* NOTE: Slightly different operands for this opcode */
707
708 status =
709 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
710 walk_state->operands[0],
711 walk_state->operands[1],
712 walk_state->operands[2],
713 walk_state->operands[3]);
714 } else {
715 /* All other, create_xxx_field opcodes */
716
717 status =
718 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
719 walk_state->operands[0],
720 walk_state->operands[1], NULL,
721 walk_state->operands[2]);
722 }
723
724 return_ACPI_STATUS(status);
725 }
726
727 /*******************************************************************************
728 *
729 * FUNCTION: acpi_ds_eval_region_operands
730 *
731 * PARAMETERS: walk_state - Current walk
732 * Op - A valid region Op object
733 *
734 * RETURN: Status
735 *
736 * DESCRIPTION: Get region address and length
737 * Called from acpi_ds_exec_end_op during op_region parse tree walk
738 *
739 ******************************************************************************/
740
741 acpi_status
742 acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
743 union acpi_parse_object *op)
744 {
745 acpi_status status;
746 union acpi_operand_object *obj_desc;
747 union acpi_operand_object *operand_desc;
748 struct acpi_namespace_node *node;
749 union acpi_parse_object *next_op;
750
751 ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
752
753 /*
754 * This is where we evaluate the address and length fields of the
755 * op_region declaration
756 */
757 node = op->common.node;
758
759 /* next_op points to the op that holds the space_iD */
760
761 next_op = op->common.value.arg;
762
763 /* next_op points to address op */
764
765 next_op = next_op->common.next;
766
767 /* Evaluate/create the address and length operands */
768
769 status = acpi_ds_create_operands(walk_state, next_op);
770 if (ACPI_FAILURE(status)) {
771 return_ACPI_STATUS(status);
772 }
773
774 /* Resolve the length and address operands to numbers */
775
776 status = acpi_ex_resolve_operands(op->common.aml_opcode,
777 ACPI_WALK_OPERANDS, walk_state);
778 if (ACPI_FAILURE(status)) {
779 return_ACPI_STATUS(status);
780 }
781
782 obj_desc = acpi_ns_get_attached_object(node);
783 if (!obj_desc) {
784 return_ACPI_STATUS(AE_NOT_EXIST);
785 }
786
787 /*
788 * Get the length operand and save it
789 * (at Top of stack)
790 */
791 operand_desc = walk_state->operands[walk_state->num_operands - 1];
792
793 obj_desc->region.length = (u32) operand_desc->integer.value;
794 acpi_ut_remove_reference(operand_desc);
795
796 /*
797 * Get the address and save it
798 * (at top of stack - 1)
799 */
800 operand_desc = walk_state->operands[walk_state->num_operands - 2];
801
802 obj_desc->region.address = (acpi_physical_address)
803 operand_desc->integer.value;
804 acpi_ut_remove_reference(operand_desc);
805
806 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
807 obj_desc,
808 ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address),
809 obj_desc->region.length));
810
811 /* Now the address and length are valid for this opregion */
812
813 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
814
815 return_ACPI_STATUS(status);
816 }
817
818 /*******************************************************************************
819 *
820 * FUNCTION: acpi_ds_eval_table_region_operands
821 *
822 * PARAMETERS: walk_state - Current walk
823 * Op - A valid region Op object
824 *
825 * RETURN: Status
826 *
827 * DESCRIPTION: Get region address and length
828 * Called from acpi_ds_exec_end_op during data_table_region parse tree walk
829 *
830 ******************************************************************************/
831
832 acpi_status
833 acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
834 union acpi_parse_object *op)
835 {
836 acpi_status status;
837 union acpi_operand_object *obj_desc;
838 union acpi_operand_object **operand;
839 struct acpi_namespace_node *node;
840 union acpi_parse_object *next_op;
841 u32 table_index;
842 struct acpi_table_header *table;
843
844 ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);
845
846 /*
847 * This is where we evaluate the signature_string and oem_iDString
848 * and oem_table_iDString of the data_table_region declaration
849 */
850 node = op->common.node;
851
852 /* next_op points to signature_string op */
853
854 next_op = op->common.value.arg;
855
856 /*
857 * Evaluate/create the signature_string and oem_iDString
858 * and oem_table_iDString operands
859 */
860 status = acpi_ds_create_operands(walk_state, next_op);
861 if (ACPI_FAILURE(status)) {
862 return_ACPI_STATUS(status);
863 }
864
865 /*
866 * Resolve the signature_string and oem_iDString
867 * and oem_table_iDString operands
868 */
869 status = acpi_ex_resolve_operands(op->common.aml_opcode,
870 ACPI_WALK_OPERANDS, walk_state);
871 if (ACPI_FAILURE(status)) {
872 return_ACPI_STATUS(status);
873 }
874
875 operand = &walk_state->operands[0];
876
877 /* Find the ACPI table */
878
879 status = acpi_tb_find_table(operand[0]->string.pointer,
880 operand[1]->string.pointer,
881 operand[2]->string.pointer, &table_index);
882 if (ACPI_FAILURE(status)) {
883 return_ACPI_STATUS(status);
884 }
885
886 acpi_ut_remove_reference(operand[0]);
887 acpi_ut_remove_reference(operand[1]);
888 acpi_ut_remove_reference(operand[2]);
889
890 status = acpi_get_table_by_index(table_index, &table);
891 if (ACPI_FAILURE(status)) {
892 return_ACPI_STATUS(status);
893 }
894
895 obj_desc = acpi_ns_get_attached_object(node);
896 if (!obj_desc) {
897 return_ACPI_STATUS(AE_NOT_EXIST);
898 }
899
900 obj_desc->region.address =
901 (acpi_physical_address) ACPI_TO_INTEGER(table);
902 obj_desc->region.length = table->length;
903
904 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
905 obj_desc,
906 ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address),
907 obj_desc->region.length));
908
909 /* Now the address and length are valid for this opregion */
910
911 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
912
913 return_ACPI_STATUS(status);
914 }
915
916 /*******************************************************************************
917 *
918 * FUNCTION: acpi_ds_eval_data_object_operands
919 *
920 * PARAMETERS: walk_state - Current walk
921 * Op - A valid data_object Op object
922 * obj_desc - data_object
923 *
924 * RETURN: Status
925 *
926 * DESCRIPTION: Get the operands and complete the following data object types:
927 * Buffer, Package.
928 *
929 ******************************************************************************/
930
931 acpi_status
932 acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
933 union acpi_parse_object *op,
934 union acpi_operand_object *obj_desc)
935 {
936 acpi_status status;
937 union acpi_operand_object *arg_desc;
938 u32 length;
939
940 ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);
941
942 /* The first operand (for all of these data objects) is the length */
943
944 /*
945 * Set proper index into operand stack for acpi_ds_obj_stack_push
946 * invoked inside acpi_ds_create_operand.
947 */
948 walk_state->operand_index = walk_state->num_operands;
949
950 status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
951 if (ACPI_FAILURE(status)) {
952 return_ACPI_STATUS(status);
953 }
954
955 status = acpi_ex_resolve_operands(walk_state->opcode,
956 &(walk_state->
957 operands[walk_state->num_operands -
958 1]), walk_state);
959 if (ACPI_FAILURE(status)) {
960 return_ACPI_STATUS(status);
961 }
962
963 /* Extract length operand */
964
965 arg_desc = walk_state->operands[walk_state->num_operands - 1];
966 length = (u32) arg_desc->integer.value;
967
968 /* Cleanup for length operand */
969
970 status = acpi_ds_obj_stack_pop(1, walk_state);
971 if (ACPI_FAILURE(status)) {
972 return_ACPI_STATUS(status);
973 }
974
975 acpi_ut_remove_reference(arg_desc);
976
977 /*
978 * Create the actual data object
979 */
980 switch (op->common.aml_opcode) {
981 case AML_BUFFER_OP:
982
983 status =
984 acpi_ds_build_internal_buffer_obj(walk_state, op, length,
985 &obj_desc);
986 break;
987
988 case AML_PACKAGE_OP:
989 case AML_VAR_PACKAGE_OP:
990
991 status =
992 acpi_ds_build_internal_package_obj(walk_state, op, length,
993 &obj_desc);
994 break;
995
996 default:
997 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
998 }
999
1000 if (ACPI_SUCCESS(status)) {
1001 /*
1002 * Return the object in the walk_state, unless the parent is a package -
1003 * in this case, the return object will be stored in the parse tree
1004 * for the package.
1005 */
1006 if ((!op->common.parent) ||
1007 ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&
1008 (op->common.parent->common.aml_opcode !=
1009 AML_VAR_PACKAGE_OP)
1010 && (op->common.parent->common.aml_opcode != AML_NAME_OP))) {
1011 walk_state->result_obj = obj_desc;
1012 }
1013 }
1014
1015 return_ACPI_STATUS(status);
1016 }
1017
1018 /*******************************************************************************
1019 *
1020 * FUNCTION: acpi_ds_eval_bank_field_operands
1021 *
1022 * PARAMETERS: walk_state - Current walk
1023 * Op - A valid bank_field Op object
1024 *
1025 * RETURN: Status
1026 *
1027 * DESCRIPTION: Get bank_field bank_value
1028 * Called from acpi_ds_exec_end_op during bank_field parse tree walk
1029 *
1030 ******************************************************************************/
1031
1032 acpi_status
1033 acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state,
1034 union acpi_parse_object *op)
1035 {
1036 acpi_status status;
1037 union acpi_operand_object *obj_desc;
1038 union acpi_operand_object *operand_desc;
1039 struct acpi_namespace_node *node;
1040 union acpi_parse_object *next_op;
1041 union acpi_parse_object *arg;
1042
1043 ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);
1044
1045 /*
1046 * This is where we evaluate the bank_value field of the
1047 * bank_field declaration
1048 */
1049
1050 /* next_op points to the op that holds the Region */
1051
1052 next_op = op->common.value.arg;
1053
1054 /* next_op points to the op that holds the Bank Register */
1055
1056 next_op = next_op->common.next;
1057
1058 /* next_op points to the op that holds the Bank Value */
1059
1060 next_op = next_op->common.next;
1061
1062 /*
1063 * Set proper index into operand stack for acpi_ds_obj_stack_push
1064 * invoked inside acpi_ds_create_operand.
1065 *
1066 * We use walk_state->Operands[0] to store the evaluated bank_value
1067 */
1068 walk_state->operand_index = 0;
1069
1070 status = acpi_ds_create_operand(walk_state, next_op, 0);
1071 if (ACPI_FAILURE(status)) {
1072 return_ACPI_STATUS(status);
1073 }
1074
1075 status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);
1076 if (ACPI_FAILURE(status)) {
1077 return_ACPI_STATUS(status);
1078 }
1079
1080 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
1081 acpi_ps_get_opcode_name(op->common.aml_opcode), 1);
1082 /*
1083 * Get the bank_value operand and save it
1084 * (at Top of stack)
1085 */
1086 operand_desc = walk_state->operands[0];
1087
1088 /* Arg points to the start Bank Field */
1089
1090 arg = acpi_ps_get_arg(op, 4);
1091 while (arg) {
1092
1093 /* Ignore OFFSET and ACCESSAS terms here */
1094
1095 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
1096 node = arg->common.node;
1097
1098 obj_desc = acpi_ns_get_attached_object(node);
1099 if (!obj_desc) {
1100 return_ACPI_STATUS(AE_NOT_EXIST);
1101 }
1102
1103 obj_desc->bank_field.value =
1104 (u32) operand_desc->integer.value;
1105 }
1106
1107 /* Move to next field in the list */
1108
1109 arg = arg->common.next;
1110 }
1111
1112 acpi_ut_remove_reference(operand_desc);
1113 return_ACPI_STATUS(status);
1114 }
1115
1116 /*******************************************************************************
1117 *
1118 * FUNCTION: acpi_ds_exec_begin_control_op
1119 *
1120 * PARAMETERS: walk_list - The list that owns the walk stack
1121 * Op - The control Op
1122 *
1123 * RETURN: Status
1124 *
1125 * DESCRIPTION: Handles all control ops encountered during control method
1126 * execution.
1127 *
1128 ******************************************************************************/
1129
1130 acpi_status
1131 acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state,
1132 union acpi_parse_object *op)
1133 {
1134 acpi_status status = AE_OK;
1135 union acpi_generic_state *control_state;
1136
1137 ACPI_FUNCTION_NAME(ds_exec_begin_control_op);
1138
1139 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p Opcode=%2.2X State=%p\n", op,
1140 op->common.aml_opcode, walk_state));
1141
1142 switch (op->common.aml_opcode) {
1143 case AML_IF_OP:
1144 case AML_WHILE_OP:
1145
1146 /*
1147 * IF/WHILE: Create a new control state to manage these
1148 * constructs. We need to manage these as a stack, in order
1149 * to handle nesting.
1150 */
1151 control_state = acpi_ut_create_control_state();
1152 if (!control_state) {
1153 status = AE_NO_MEMORY;
1154 break;
1155 }
1156 /*
1157 * Save a pointer to the predicate for multiple executions
1158 * of a loop
1159 */
1160 control_state->control.aml_predicate_start =
1161 walk_state->parser_state.aml - 1;
1162 control_state->control.package_end =
1163 walk_state->parser_state.pkg_end;
1164 control_state->control.opcode = op->common.aml_opcode;
1165
1166 /* Push the control state on this walk's control stack */
1167
1168 acpi_ut_push_generic_state(&walk_state->control_state,
1169 control_state);
1170 break;
1171
1172 case AML_ELSE_OP:
1173
1174 /* Predicate is in the state object */
1175 /* If predicate is true, the IF was executed, ignore ELSE part */
1176
1177 if (walk_state->last_predicate) {
1178 status = AE_CTRL_TRUE;
1179 }
1180
1181 break;
1182
1183 case AML_RETURN_OP:
1184
1185 break;
1186
1187 default:
1188 break;
1189 }
1190
1191 return (status);
1192 }
1193
1194 /*******************************************************************************
1195 *
1196 * FUNCTION: acpi_ds_exec_end_control_op
1197 *
1198 * PARAMETERS: walk_list - The list that owns the walk stack
1199 * Op - The control Op
1200 *
1201 * RETURN: Status
1202 *
1203 * DESCRIPTION: Handles all control ops encountered during control method
1204 * execution.
1205 *
1206 ******************************************************************************/
1207
1208 acpi_status
1209 acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state,
1210 union acpi_parse_object * op)
1211 {
1212 acpi_status status = AE_OK;
1213 union acpi_generic_state *control_state;
1214
1215 ACPI_FUNCTION_NAME(ds_exec_end_control_op);
1216
1217 switch (op->common.aml_opcode) {
1218 case AML_IF_OP:
1219
1220 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", op));
1221
1222 /*
1223 * Save the result of the predicate in case there is an
1224 * ELSE to come
1225 */
1226 walk_state->last_predicate =
1227 (u8) walk_state->control_state->common.value;
1228
1229 /*
1230 * Pop the control state that was created at the start
1231 * of the IF and free it
1232 */
1233 control_state =
1234 acpi_ut_pop_generic_state(&walk_state->control_state);
1235 acpi_ut_delete_generic_state(control_state);
1236 break;
1237
1238 case AML_ELSE_OP:
1239
1240 break;
1241
1242 case AML_WHILE_OP:
1243
1244 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", op));
1245
1246 if (walk_state->control_state->common.value) {
1247
1248 /* Predicate was true, go back and evaluate it again! */
1249
1250 status = AE_CTRL_PENDING;
1251 }
1252
1253 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1254 "[WHILE_OP] termination! Op=%p\n", op));
1255
1256 /* Pop this control state and free it */
1257
1258 control_state =
1259 acpi_ut_pop_generic_state(&walk_state->control_state);
1260
1261 walk_state->aml_last_while =
1262 control_state->control.aml_predicate_start;
1263 acpi_ut_delete_generic_state(control_state);
1264 break;
1265
1266 case AML_RETURN_OP:
1267
1268 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1269 "[RETURN_OP] Op=%p Arg=%p\n", op,
1270 op->common.value.arg));
1271
1272 /*
1273 * One optional operand -- the return value
1274 * It can be either an immediate operand or a result that
1275 * has been bubbled up the tree
1276 */
1277 if (op->common.value.arg) {
1278
1279 /* Since we have a real Return(), delete any implicit return */
1280
1281 acpi_ds_clear_implicit_return(walk_state);
1282
1283 /* Return statement has an immediate operand */
1284
1285 status =
1286 acpi_ds_create_operands(walk_state,
1287 op->common.value.arg);
1288 if (ACPI_FAILURE(status)) {
1289 return (status);
1290 }
1291
1292 /*
1293 * If value being returned is a Reference (such as
1294 * an arg or local), resolve it now because it may
1295 * cease to exist at the end of the method.
1296 */
1297 status =
1298 acpi_ex_resolve_to_value(&walk_state->operands[0],
1299 walk_state);
1300 if (ACPI_FAILURE(status)) {
1301 return (status);
1302 }
1303
1304 /*
1305 * Get the return value and save as the last result
1306 * value. This is the only place where walk_state->return_desc
1307 * is set to anything other than zero!
1308 */
1309 walk_state->return_desc = walk_state->operands[0];
1310 } else if (walk_state->result_count) {
1311
1312 /* Since we have a real Return(), delete any implicit return */
1313
1314 acpi_ds_clear_implicit_return(walk_state);
1315
1316 /*
1317 * The return value has come from a previous calculation.
1318 *
1319 * If value being returned is a Reference (such as
1320 * an arg or local), resolve it now because it may
1321 * cease to exist at the end of the method.
1322 *
1323 * Allow references created by the Index operator to return unchanged.
1324 */
1325 if ((ACPI_GET_DESCRIPTOR_TYPE
1326 (walk_state->results->results.obj_desc[0]) ==
1327 ACPI_DESC_TYPE_OPERAND)
1328 &&
1329 (ACPI_GET_OBJECT_TYPE
1330 (walk_state->results->results.obj_desc[0]) ==
1331 ACPI_TYPE_LOCAL_REFERENCE)
1332 && ((walk_state->results->results.obj_desc[0])->
1333 reference.class != ACPI_REFCLASS_INDEX)) {
1334 status =
1335 acpi_ex_resolve_to_value(&walk_state->
1336 results->results.
1337 obj_desc[0],
1338 walk_state);
1339 if (ACPI_FAILURE(status)) {
1340 return (status);
1341 }
1342 }
1343
1344 walk_state->return_desc =
1345 walk_state->results->results.obj_desc[0];
1346 } else {
1347 /* No return operand */
1348
1349 if (walk_state->num_operands) {
1350 acpi_ut_remove_reference(walk_state->
1351 operands[0]);
1352 }
1353
1354 walk_state->operands[0] = NULL;
1355 walk_state->num_operands = 0;
1356 walk_state->return_desc = NULL;
1357 }
1358
1359 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
1360 "Completed RETURN_OP State=%p, RetVal=%p\n",
1361 walk_state, walk_state->return_desc));
1362
1363 /* End the control method execution right now */
1364
1365 status = AE_CTRL_TERMINATE;
1366 break;
1367
1368 case AML_NOOP_OP:
1369
1370 /* Just do nothing! */
1371 break;
1372
1373 case AML_BREAK_POINT_OP:
1374
1375 /* Call up to the OS service layer to handle this */
1376
1377 status =
1378 acpi_os_signal(ACPI_SIGNAL_BREAKPOINT,
1379 "Executed AML Breakpoint opcode");
1380
1381 /* If and when it returns, all done. */
1382
1383 break;
1384
1385 case AML_BREAK_OP:
1386 case AML_CONTINUE_OP: /* ACPI 2.0 */
1387
1388 /* Pop and delete control states until we find a while */
1389
1390 while (walk_state->control_state &&
1391 (walk_state->control_state->control.opcode !=
1392 AML_WHILE_OP)) {
1393 control_state =
1394 acpi_ut_pop_generic_state(&walk_state->
1395 control_state);
1396 acpi_ut_delete_generic_state(control_state);
1397 }
1398
1399 /* No while found? */
1400
1401 if (!walk_state->control_state) {
1402 return (AE_AML_NO_WHILE);
1403 }
1404
1405 /* Was: walk_state->aml_last_while = walk_state->control_state->Control.aml_predicate_start; */
1406
1407 walk_state->aml_last_while =
1408 walk_state->control_state->control.package_end;
1409
1410 /* Return status depending on opcode */
1411
1412 if (op->common.aml_opcode == AML_BREAK_OP) {
1413 status = AE_CTRL_BREAK;
1414 } else {
1415 status = AE_CTRL_CONTINUE;
1416 }
1417 break;
1418
1419 default:
1420
1421 ACPI_ERROR((AE_INFO, "Unknown control opcode=%X Op=%p",
1422 op->common.aml_opcode, op));
1423
1424 status = AE_AML_BAD_OPCODE;
1425 break;
1426 }
1427
1428 return (status);
1429 }
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