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Merge branch 'master' of /usr/src/linux-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / executer / exstore.c
1
2 /******************************************************************************
3 *
4 * Module Name: exstore - AML Interpreter object store support
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 #include <acpi/acpi.h>
46 #include <acpi/acdispat.h>
47 #include <acpi/acinterp.h>
48 #include <acpi/amlcode.h>
49 #include <acpi/acnamesp.h>
50 #include <acpi/acparser.h>
51
52 #define _COMPONENT ACPI_EXECUTER
53 ACPI_MODULE_NAME("exstore")
54
55 /* Local prototypes */
56 static void
57 acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
58 u32 level, u32 index);
59
60 static acpi_status
61 acpi_ex_store_object_to_index(union acpi_operand_object *val_desc,
62 union acpi_operand_object *dest_desc,
63 struct acpi_walk_state *walk_state);
64
65 /*******************************************************************************
66 *
67 * FUNCTION: acpi_ex_do_debug_object
68 *
69 * PARAMETERS: source_desc - Value to be stored
70 * Level - Indentation level (used for packages)
71 * Index - Current package element, zero if not pkg
72 *
73 * RETURN: None
74 *
75 * DESCRIPTION: Handles stores to the Debug Object.
76 *
77 ******************************************************************************/
78
79 static void
80 acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
81 u32 level, u32 index)
82 {
83 u32 i;
84
85 ACPI_FUNCTION_TRACE_PTR("ex_do_debug_object", source_desc);
86
87 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %*s",
88 level, " "));
89
90 /* Display index for package output only */
91
92 if (index > 0) {
93 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
94 "(%.2u) ", index - 1));
95 }
96
97 if (!source_desc) {
98 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "<Null Object>\n"));
99 return_VOID;
100 }
101
102 if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) {
103 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: ",
104 acpi_ut_get_object_type_name
105 (source_desc)));
106
107 if (!acpi_ut_valid_internal_object(source_desc)) {
108 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
109 "%p, Invalid Internal Object!\n",
110 source_desc));
111 return_VOID;
112 }
113 } else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) ==
114 ACPI_DESC_TYPE_NAMED) {
115 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: %p\n",
116 acpi_ut_get_type_name(((struct
117 acpi_namespace_node
118 *)source_desc)->
119 type),
120 source_desc));
121 return_VOID;
122 } else {
123 return_VOID;
124 }
125
126 switch (ACPI_GET_OBJECT_TYPE(source_desc)) {
127 case ACPI_TYPE_INTEGER:
128
129 /* Output correct integer width */
130
131 if (acpi_gbl_integer_byte_width == 4) {
132 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%8.8X\n",
133 (u32) source_desc->integer.
134 value));
135 } else {
136 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
137 "0x%8.8X%8.8X\n",
138 ACPI_FORMAT_UINT64(source_desc->
139 integer.
140 value)));
141 }
142 break;
143
144 case ACPI_TYPE_BUFFER:
145
146 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X]\n",
147 (u32) source_desc->buffer.length));
148 ACPI_DUMP_BUFFER(source_desc->buffer.pointer,
149 (source_desc->buffer.length <
150 32) ? source_desc->buffer.length : 32);
151 break;
152
153 case ACPI_TYPE_STRING:
154
155 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X] \"%s\"\n",
156 source_desc->string.length,
157 source_desc->string.pointer));
158 break;
159
160 case ACPI_TYPE_PACKAGE:
161
162 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
163 "[0x%.2X Elements]\n",
164 source_desc->package.count));
165
166 /* Output the entire contents of the package */
167
168 for (i = 0; i < source_desc->package.count; i++) {
169 acpi_ex_do_debug_object(source_desc->package.
170 elements[i], level + 4, i + 1);
171 }
172 break;
173
174 case ACPI_TYPE_LOCAL_REFERENCE:
175
176 if (source_desc->reference.opcode == AML_INDEX_OP) {
177 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
178 "[%s, 0x%X]\n",
179 acpi_ps_get_opcode_name
180 (source_desc->reference.opcode),
181 source_desc->reference.offset));
182 } else {
183 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s]\n",
184 acpi_ps_get_opcode_name
185 (source_desc->reference.opcode)));
186 }
187
188 if (source_desc->reference.object) {
189 if (ACPI_GET_DESCRIPTOR_TYPE
190 (source_desc->reference.object) ==
191 ACPI_DESC_TYPE_NAMED) {
192 acpi_ex_do_debug_object(((struct
193 acpi_namespace_node *)
194 source_desc->reference.
195 object)->object,
196 level + 4, 0);
197 } else {
198 acpi_ex_do_debug_object(source_desc->reference.
199 object, level + 4, 0);
200 }
201 } else if (source_desc->reference.node) {
202 acpi_ex_do_debug_object((source_desc->reference.node)->
203 object, level + 4, 0);
204 }
205 break;
206
207 default:
208
209 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%p %s\n",
210 source_desc,
211 acpi_ut_get_object_type_name
212 (source_desc)));
213 break;
214 }
215
216 ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n"));
217 return_VOID;
218 }
219
220 /*******************************************************************************
221 *
222 * FUNCTION: acpi_ex_store
223 *
224 * PARAMETERS: *source_desc - Value to be stored
225 * *dest_desc - Where to store it. Must be an NS node
226 * or an union acpi_operand_object of type
227 * Reference;
228 * walk_state - Current walk state
229 *
230 * RETURN: Status
231 *
232 * DESCRIPTION: Store the value described by source_desc into the location
233 * described by dest_desc. Called by various interpreter
234 * functions to store the result of an operation into
235 * the destination operand -- not just simply the actual "Store"
236 * ASL operator.
237 *
238 ******************************************************************************/
239
240 acpi_status
241 acpi_ex_store(union acpi_operand_object *source_desc,
242 union acpi_operand_object *dest_desc,
243 struct acpi_walk_state *walk_state)
244 {
245 acpi_status status = AE_OK;
246 union acpi_operand_object *ref_desc = dest_desc;
247
248 ACPI_FUNCTION_TRACE_PTR("ex_store", dest_desc);
249
250 /* Validate parameters */
251
252 if (!source_desc || !dest_desc) {
253 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Null parameter\n"));
254 return_ACPI_STATUS(AE_AML_NO_OPERAND);
255 }
256
257 /* dest_desc can be either a namespace node or an ACPI object */
258
259 if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) {
260 /*
261 * Dest is a namespace node,
262 * Storing an object into a Named node.
263 */
264 status = acpi_ex_store_object_to_node(source_desc,
265 (struct
266 acpi_namespace_node *)
267 dest_desc, walk_state,
268 ACPI_IMPLICIT_CONVERSION);
269
270 return_ACPI_STATUS(status);
271 }
272
273 /* Destination object must be a Reference or a Constant object */
274
275 switch (ACPI_GET_OBJECT_TYPE(dest_desc)) {
276 case ACPI_TYPE_LOCAL_REFERENCE:
277 break;
278
279 case ACPI_TYPE_INTEGER:
280
281 /* Allow stores to Constants -- a Noop as per ACPI spec */
282
283 if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) {
284 return_ACPI_STATUS(AE_OK);
285 }
286
287 /*lint -fallthrough */
288
289 default:
290
291 /* Destination is not a Reference object */
292
293 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
294 "Target is not a Reference or Constant object - %s [%p]\n",
295 acpi_ut_get_object_type_name(dest_desc),
296 dest_desc));
297
298 ACPI_DUMP_STACK_ENTRY(source_desc);
299 ACPI_DUMP_STACK_ENTRY(dest_desc);
300 ACPI_DUMP_OPERANDS(&dest_desc, ACPI_IMODE_EXECUTE, "ex_store",
301 2,
302 "Target is not a Reference or Constant object");
303
304 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
305 }
306
307 /*
308 * Examine the Reference opcode. These cases are handled:
309 *
310 * 1) Store to Name (Change the object associated with a name)
311 * 2) Store to an indexed area of a Buffer or Package
312 * 3) Store to a Method Local or Arg
313 * 4) Store to the debug object
314 */
315 switch (ref_desc->reference.opcode) {
316 case AML_NAME_OP:
317 case AML_REF_OF_OP:
318
319 /* Storing an object into a Name "container" */
320
321 status = acpi_ex_store_object_to_node(source_desc,
322 ref_desc->reference.
323 object, walk_state,
324 ACPI_IMPLICIT_CONVERSION);
325 break;
326
327 case AML_INDEX_OP:
328
329 /* Storing to an Index (pointer into a packager or buffer) */
330
331 status =
332 acpi_ex_store_object_to_index(source_desc, ref_desc,
333 walk_state);
334 break;
335
336 case AML_LOCAL_OP:
337 case AML_ARG_OP:
338
339 /* Store to a method local/arg */
340
341 status =
342 acpi_ds_store_object_to_local(ref_desc->reference.opcode,
343 ref_desc->reference.offset,
344 source_desc, walk_state);
345 break;
346
347 case AML_DEBUG_OP:
348
349 /*
350 * Storing to the Debug object causes the value stored to be
351 * displayed and otherwise has no effect -- see ACPI Specification
352 */
353 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
354 "**** Write to Debug Object: Object %p %s ****:\n\n",
355 source_desc,
356 acpi_ut_get_object_type_name(source_desc)));
357
358 acpi_ex_do_debug_object(source_desc, 0, 0);
359 break;
360
361 default:
362
363 ACPI_REPORT_ERROR(("ex_store: Unknown Reference opcode %X\n",
364 ref_desc->reference.opcode));
365 ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_ERROR);
366
367 status = AE_AML_INTERNAL;
368 break;
369 }
370
371 return_ACPI_STATUS(status);
372 }
373
374 /*******************************************************************************
375 *
376 * FUNCTION: acpi_ex_store_object_to_index
377 *
378 * PARAMETERS: *source_desc - Value to be stored
379 * *dest_desc - Named object to receive the value
380 * walk_state - Current walk state
381 *
382 * RETURN: Status
383 *
384 * DESCRIPTION: Store the object to indexed Buffer or Package element
385 *
386 ******************************************************************************/
387
388 static acpi_status
389 acpi_ex_store_object_to_index(union acpi_operand_object *source_desc,
390 union acpi_operand_object *index_desc,
391 struct acpi_walk_state *walk_state)
392 {
393 acpi_status status = AE_OK;
394 union acpi_operand_object *obj_desc;
395 union acpi_operand_object *new_desc;
396 u8 value = 0;
397 u32 i;
398
399 ACPI_FUNCTION_TRACE("ex_store_object_to_index");
400
401 /*
402 * Destination must be a reference pointer, and
403 * must point to either a buffer or a package
404 */
405 switch (index_desc->reference.target_type) {
406 case ACPI_TYPE_PACKAGE:
407 /*
408 * Storing to a package element. Copy the object and replace
409 * any existing object with the new object. No implicit
410 * conversion is performed.
411 *
412 * The object at *(index_desc->Reference.Where) is the
413 * element within the package that is to be modified.
414 * The parent package object is at index_desc->Reference.Object
415 */
416 obj_desc = *(index_desc->reference.where);
417
418 status =
419 acpi_ut_copy_iobject_to_iobject(source_desc, &new_desc,
420 walk_state);
421 if (ACPI_FAILURE(status)) {
422 return_ACPI_STATUS(status);
423 }
424
425 if (obj_desc) {
426 /* Decrement reference count by the ref count of the parent package */
427
428 for (i = 0; i < ((union acpi_operand_object *)
429 index_desc->reference.object)->common.
430 reference_count; i++) {
431 acpi_ut_remove_reference(obj_desc);
432 }
433 }
434
435 *(index_desc->reference.where) = new_desc;
436
437 /* Increment ref count by the ref count of the parent package-1 */
438
439 for (i = 1; i < ((union acpi_operand_object *)
440 index_desc->reference.object)->common.
441 reference_count; i++) {
442 acpi_ut_add_reference(new_desc);
443 }
444
445 break;
446
447 case ACPI_TYPE_BUFFER_FIELD:
448
449 /*
450 * Store into a Buffer or String (not actually a real buffer_field)
451 * at a location defined by an Index.
452 *
453 * The first 8-bit element of the source object is written to the
454 * 8-bit Buffer location defined by the Index destination object,
455 * according to the ACPI 2.0 specification.
456 */
457
458 /*
459 * Make sure the target is a Buffer or String. An error should
460 * not happen here, since the reference_object was constructed
461 * by the INDEX_OP code.
462 */
463 obj_desc = index_desc->reference.object;
464 if ((ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_BUFFER) &&
465 (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_STRING)) {
466 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
467 }
468
469 /*
470 * The assignment of the individual elements will be slightly
471 * different for each source type.
472 */
473 switch (ACPI_GET_OBJECT_TYPE(source_desc)) {
474 case ACPI_TYPE_INTEGER:
475
476 /* Use the least-significant byte of the integer */
477
478 value = (u8) (source_desc->integer.value);
479 break;
480
481 case ACPI_TYPE_BUFFER:
482 case ACPI_TYPE_STRING:
483
484 /* Note: Takes advantage of common string/buffer fields */
485
486 value = source_desc->buffer.pointer[0];
487 break;
488
489 default:
490
491 /* All other types are invalid */
492
493 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
494 "Source must be Integer/Buffer/String type, not %s\n",
495 acpi_ut_get_object_type_name
496 (source_desc)));
497 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
498 }
499
500 /* Store the source value into the target buffer byte */
501
502 obj_desc->buffer.pointer[index_desc->reference.offset] = value;
503 break;
504
505 default:
506 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
507 "Target is not a Package or buffer_field\n"));
508 status = AE_AML_OPERAND_TYPE;
509 break;
510 }
511
512 return_ACPI_STATUS(status);
513 }
514
515 /*******************************************************************************
516 *
517 * FUNCTION: acpi_ex_store_object_to_node
518 *
519 * PARAMETERS: source_desc - Value to be stored
520 * Node - Named object to receive the value
521 * walk_state - Current walk state
522 * implicit_conversion - Perform implicit conversion (yes/no)
523 *
524 * RETURN: Status
525 *
526 * DESCRIPTION: Store the object to the named object.
527 *
528 * The Assignment of an object to a named object is handled here
529 * The value passed in will replace the current value (if any)
530 * with the input value.
531 *
532 * When storing into an object the data is converted to the
533 * target object type then stored in the object. This means
534 * that the target object type (for an initialized target) will
535 * not be changed by a store operation.
536 *
537 * Assumes parameters are already validated.
538 *
539 ******************************************************************************/
540
541 acpi_status
542 acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
543 struct acpi_namespace_node *node,
544 struct acpi_walk_state *walk_state,
545 u8 implicit_conversion)
546 {
547 acpi_status status = AE_OK;
548 union acpi_operand_object *target_desc;
549 union acpi_operand_object *new_desc;
550 acpi_object_type target_type;
551
552 ACPI_FUNCTION_TRACE_PTR("ex_store_object_to_node", source_desc);
553
554 /* Get current type of the node, and object attached to Node */
555
556 target_type = acpi_ns_get_type(node);
557 target_desc = acpi_ns_get_attached_object(node);
558
559 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n",
560 source_desc,
561 acpi_ut_get_object_type_name(source_desc), node,
562 acpi_ut_get_type_name(target_type)));
563
564 /*
565 * Resolve the source object to an actual value
566 * (If it is a reference object)
567 */
568 status = acpi_ex_resolve_object(&source_desc, target_type, walk_state);
569 if (ACPI_FAILURE(status)) {
570 return_ACPI_STATUS(status);
571 }
572
573 /* If no implicit conversion, drop into the default case below */
574
575 if ((!implicit_conversion) || (walk_state->opcode == AML_COPY_OP)) {
576 /* Force execution of default (no implicit conversion) */
577
578 target_type = ACPI_TYPE_ANY;
579 }
580
581 /* Do the actual store operation */
582
583 switch (target_type) {
584 case ACPI_TYPE_BUFFER_FIELD:
585 case ACPI_TYPE_LOCAL_REGION_FIELD:
586 case ACPI_TYPE_LOCAL_BANK_FIELD:
587 case ACPI_TYPE_LOCAL_INDEX_FIELD:
588
589 /* For fields, copy the source data to the target field. */
590
591 status = acpi_ex_write_data_to_field(source_desc, target_desc,
592 &walk_state->result_obj);
593 break;
594
595 case ACPI_TYPE_INTEGER:
596 case ACPI_TYPE_STRING:
597 case ACPI_TYPE_BUFFER:
598
599 /*
600 * These target types are all of type Integer/String/Buffer, and
601 * therefore support implicit conversion before the store.
602 *
603 * Copy and/or convert the source object to a new target object
604 */
605 status =
606 acpi_ex_store_object_to_object(source_desc, target_desc,
607 &new_desc, walk_state);
608 if (ACPI_FAILURE(status)) {
609 return_ACPI_STATUS(status);
610 }
611
612 if (new_desc != target_desc) {
613 /*
614 * Store the new new_desc as the new value of the Name, and set
615 * the Name's type to that of the value being stored in it.
616 * source_desc reference count is incremented by attach_object.
617 *
618 * Note: This may change the type of the node if an explicit store
619 * has been performed such that the node/object type has been
620 * changed.
621 */
622 status =
623 acpi_ns_attach_object(node, new_desc,
624 new_desc->common.type);
625
626 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
627 "Store %s into %s via Convert/Attach\n",
628 acpi_ut_get_object_type_name
629 (source_desc),
630 acpi_ut_get_object_type_name
631 (new_desc)));
632 }
633 break;
634
635 default:
636
637 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
638 "Storing %s (%p) directly into node (%p) with no implicit conversion\n",
639 acpi_ut_get_object_type_name(source_desc),
640 source_desc, node));
641
642 /* No conversions for all other types. Just attach the source object */
643
644 status = acpi_ns_attach_object(node, source_desc,
645 ACPI_GET_OBJECT_TYPE
646 (source_desc));
647 break;
648 }
649
650 return_ACPI_STATUS(status);
651 }
kernel source for telekom puls (alcatel/mediatek)