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[PATCH] Represent laptop_mode as jiffies internally
[linux-2.6/verdex.git] / drivers / acpi / dispatcher / dsobject.c
blob8b21f0f9e5177f3d82f9ea72b38ff772c75f972f
1 /******************************************************************************
2 *
3 * Module Name: dsobject - Dispatcher object management routines
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2006, R. Byron Moore
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include <acpi/acpi.h>
45 #include <acpi/acparser.h>
46 #include <acpi/amlcode.h>
47 #include <acpi/acdispat.h>
48 #include <acpi/acnamesp.h>
49 #include <acpi/acinterp.h>
50
51 #define _COMPONENT ACPI_DISPATCHER
52 ACPI_MODULE_NAME("dsobject")
53
54 /* Local prototypes */
55 static acpi_status
56 acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
57 union acpi_parse_object *op,
58 union acpi_operand_object **obj_desc_ptr);
59
60 #ifndef ACPI_NO_METHOD_EXECUTION
61 /*******************************************************************************
62 *
63 * FUNCTION: acpi_ds_build_internal_object
64 *
65 * PARAMETERS: walk_state - Current walk state
66 * Op - Parser object to be translated
67 * obj_desc_ptr - Where the ACPI internal object is returned
68 *
69 * RETURN: Status
70 *
71 * DESCRIPTION: Translate a parser Op object to the equivalent namespace object
72 * Simple objects are any objects other than a package object!
73 *
74 ******************************************************************************/
75
76 static acpi_status
77 acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
78 union acpi_parse_object *op,
79 union acpi_operand_object **obj_desc_ptr)
80 {
81 union acpi_operand_object *obj_desc;
82 acpi_status status;
83
84 ACPI_FUNCTION_TRACE("ds_build_internal_object");
85
86 *obj_desc_ptr = NULL;
87 if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
88 /*
89 * This is a named object reference. If this name was
90 * previously looked up in the namespace, it was stored in this op.
91 * Otherwise, go ahead and look it up now
92 */
93 if (!op->common.node) {
94 status = acpi_ns_lookup(walk_state->scope_info,
95 op->common.value.string,
96 ACPI_TYPE_ANY,
97 ACPI_IMODE_EXECUTE,
98 ACPI_NS_SEARCH_PARENT |
99 ACPI_NS_DONT_OPEN_SCOPE, NULL,
100 ACPI_CAST_INDIRECT_PTR(struct
101 acpi_namespace_node,
102 &(op->
103 common.
104 node)));
105 if (ACPI_FAILURE(status)) {
106 /* Check if we are resolving a named reference within a package */
107
108 if ((status == AE_NOT_FOUND)
109 && (acpi_gbl_enable_interpreter_slack)
110 &&
111 ((op->common.parent->common.aml_opcode ==
112 AML_PACKAGE_OP)
113 || (op->common.parent->common.aml_opcode ==
114 AML_VAR_PACKAGE_OP))) {
115 /*
116 * We didn't find the target and we are populating elements
117 * of a package - ignore if slack enabled. Some ASL code
118 * contains dangling invalid references in packages and
119 * expects that no exception will be issued. Leave the
120 * element as a null element. It cannot be used, but it
121 * can be overwritten by subsequent ASL code - this is
122 * typically the case.
123 */
124 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
125 "Ignoring unresolved reference in package [%4.4s]\n",
126 walk_state->
127 scope_info->scope.
128 node->name.ascii));
129
130 return_ACPI_STATUS(AE_OK);
131 } else {
132 ACPI_ERROR_NAMESPACE(op->common.value.
133 string, status);
134 }
135
136 return_ACPI_STATUS(status);
137 }
138 }
139 }
140
141 /* Create and init a new internal ACPI object */
142
143 obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
144 (op->common.aml_opcode))->
145 object_type);
146 if (!obj_desc) {
147 return_ACPI_STATUS(AE_NO_MEMORY);
148 }
149
150 status =
151 acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
152 &obj_desc);
153 if (ACPI_FAILURE(status)) {
154 acpi_ut_remove_reference(obj_desc);
155 return_ACPI_STATUS(status);
156 }
157
158 *obj_desc_ptr = obj_desc;
159 return_ACPI_STATUS(AE_OK);
160 }
161
162 /*******************************************************************************
163 *
164 * FUNCTION: acpi_ds_build_internal_buffer_obj
165 *
166 * PARAMETERS: walk_state - Current walk state
167 * Op - Parser object to be translated
168 * buffer_length - Length of the buffer
169 * obj_desc_ptr - Where the ACPI internal object is returned
170 *
171 * RETURN: Status
172 *
173 * DESCRIPTION: Translate a parser Op package object to the equivalent
174 * namespace object
175 *
176 ******************************************************************************/
177
178 acpi_status
179 acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
180 union acpi_parse_object *op,
181 u32 buffer_length,
182 union acpi_operand_object **obj_desc_ptr)
183 {
184 union acpi_parse_object *arg;
185 union acpi_operand_object *obj_desc;
186 union acpi_parse_object *byte_list;
187 u32 byte_list_length = 0;
188
189 ACPI_FUNCTION_TRACE("ds_build_internal_buffer_obj");
190
191 /*
192 * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
193 * The buffer object already exists (from the NS node), otherwise it must
194 * be created.
195 */
196 obj_desc = *obj_desc_ptr;
197 if (!obj_desc) {
198 /* Create a new buffer object */
199
200 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
201 *obj_desc_ptr = obj_desc;
202 if (!obj_desc) {
203 return_ACPI_STATUS(AE_NO_MEMORY);
204 }
205 }
206
207 /*
208 * Second arg is the buffer data (optional) byte_list can be either
209 * individual bytes or a string initializer. In either case, a
210 * byte_list appears in the AML.
211 */
212 arg = op->common.value.arg; /* skip first arg */
213
214 byte_list = arg->named.next;
215 if (byte_list) {
216 if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
217 ACPI_ERROR((AE_INFO,
218 "Expecting bytelist, got AML opcode %X in op %p",
219 byte_list->common.aml_opcode, byte_list));
220
221 acpi_ut_remove_reference(obj_desc);
222 return (AE_TYPE);
223 }
224
225 byte_list_length = (u32) byte_list->common.value.integer;
226 }
227
228 /*
229 * The buffer length (number of bytes) will be the larger of:
230 * 1) The specified buffer length and
231 * 2) The length of the initializer byte list
232 */
233 obj_desc->buffer.length = buffer_length;
234 if (byte_list_length > buffer_length) {
235 obj_desc->buffer.length = byte_list_length;
236 }
237
238 /* Allocate the buffer */
239
240 if (obj_desc->buffer.length == 0) {
241 obj_desc->buffer.pointer = NULL;
242 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
243 "Buffer defined with zero length in AML, creating\n"));
244 } else {
245 obj_desc->buffer.pointer =
246 ACPI_MEM_CALLOCATE(obj_desc->buffer.length);
247 if (!obj_desc->buffer.pointer) {
248 acpi_ut_delete_object_desc(obj_desc);
249 return_ACPI_STATUS(AE_NO_MEMORY);
250 }
251
252 /* Initialize buffer from the byte_list (if present) */
253
254 if (byte_list) {
255 ACPI_MEMCPY(obj_desc->buffer.pointer,
256 byte_list->named.data, byte_list_length);
257 }
258 }
259
260 obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
261 op->common.node = (struct acpi_namespace_node *)obj_desc;
262 return_ACPI_STATUS(AE_OK);
263 }
264
265 /*******************************************************************************
266 *
267 * FUNCTION: acpi_ds_build_internal_package_obj
268 *
269 * PARAMETERS: walk_state - Current walk state
270 * Op - Parser object to be translated
271 * package_length - Number of elements in the package
272 * obj_desc_ptr - Where the ACPI internal object is returned
273 *
274 * RETURN: Status
275 *
276 * DESCRIPTION: Translate a parser Op package object to the equivalent
277 * namespace object
278 *
279 ******************************************************************************/
280
281 acpi_status
282 acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
283 union acpi_parse_object *op,
284 u32 package_length,
285 union acpi_operand_object **obj_desc_ptr)
286 {
287 union acpi_parse_object *arg;
288 union acpi_parse_object *parent;
289 union acpi_operand_object *obj_desc = NULL;
290 u32 package_list_length;
291 acpi_status status = AE_OK;
292 acpi_native_uint i;
293
294 ACPI_FUNCTION_TRACE("ds_build_internal_package_obj");
295
296 /* Find the parent of a possibly nested package */
297
298 parent = op->common.parent;
299 while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
300 (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
301 parent = parent->common.parent;
302 }
303
304 /*
305 * If we are evaluating a Named package object "Name (xxxx, Package)",
306 * the package object already exists, otherwise it must be created.
307 */
308 obj_desc = *obj_desc_ptr;
309 if (!obj_desc) {
310 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
311 *obj_desc_ptr = obj_desc;
312 if (!obj_desc) {
313 return_ACPI_STATUS(AE_NO_MEMORY);
314 }
315
316 obj_desc->package.node = parent->common.node;
317 }
318
319 obj_desc->package.count = package_length;
320
321 /* Count the number of items in the package list */
322
323 arg = op->common.value.arg;
324 arg = arg->common.next;
325 for (package_list_length = 0; arg; package_list_length++) {
326 arg = arg->common.next;
327 }
328
329 /*
330 * The package length (number of elements) will be the greater
331 * of the specified length and the length of the initializer list
332 */
333 if (package_list_length > package_length) {
334 obj_desc->package.count = package_list_length;
335 }
336
337 /*
338 * Allocate the pointer array (array of pointers to the
339 * individual objects). Add an extra pointer slot so
340 * that the list is always null terminated.
341 */
342 obj_desc->package.elements = ACPI_MEM_CALLOCATE(((acpi_size) obj_desc->
343 package.count +
344 1) * sizeof(void *));
345
346 if (!obj_desc->package.elements) {
347 acpi_ut_delete_object_desc(obj_desc);
348 return_ACPI_STATUS(AE_NO_MEMORY);
349 }
350
351 /*
352 * Initialize all elements of the package
353 */
354 arg = op->common.value.arg;
355 arg = arg->common.next;
356 for (i = 0; arg; i++) {
357 if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
358 /* Object (package or buffer) is already built */
359
360 obj_desc->package.elements[i] =
361 ACPI_CAST_PTR(union acpi_operand_object,
362 arg->common.node);
363 } else {
364 status = acpi_ds_build_internal_object(walk_state, arg,
365 &obj_desc->
366 package.
367 elements[i]);
368 }
369 arg = arg->common.next;
370 }
371
372 obj_desc->package.flags |= AOPOBJ_DATA_VALID;
373 op->common.node = (struct acpi_namespace_node *)obj_desc;
374 return_ACPI_STATUS(status);
375 }
376
377 /*******************************************************************************
378 *
379 * FUNCTION: acpi_ds_create_node
380 *
381 * PARAMETERS: walk_state - Current walk state
382 * Node - NS Node to be initialized
383 * Op - Parser object to be translated
384 *
385 * RETURN: Status
386 *
387 * DESCRIPTION: Create the object to be associated with a namespace node
388 *
389 ******************************************************************************/
390
391 acpi_status
392 acpi_ds_create_node(struct acpi_walk_state *walk_state,
393 struct acpi_namespace_node *node,
394 union acpi_parse_object *op)
395 {
396 acpi_status status;
397 union acpi_operand_object *obj_desc;
398
399 ACPI_FUNCTION_TRACE_PTR("ds_create_node", op);
400
401 /*
402 * Because of the execution pass through the non-control-method
403 * parts of the table, we can arrive here twice. Only init
404 * the named object node the first time through
405 */
406 if (acpi_ns_get_attached_object(node)) {
407 return_ACPI_STATUS(AE_OK);
408 }
409
410 if (!op->common.value.arg) {
411 /* No arguments, there is nothing to do */
412
413 return_ACPI_STATUS(AE_OK);
414 }
415
416 /* Build an internal object for the argument(s) */
417
418 status = acpi_ds_build_internal_object(walk_state, op->common.value.arg,
419 &obj_desc);
420 if (ACPI_FAILURE(status)) {
421 return_ACPI_STATUS(status);
422 }
423
424 /* Re-type the object according to its argument */
425
426 node->type = ACPI_GET_OBJECT_TYPE(obj_desc);
427
428 /* Attach obj to node */
429
430 status = acpi_ns_attach_object(node, obj_desc, node->type);
431
432 /* Remove local reference to the object */
433
434 acpi_ut_remove_reference(obj_desc);
435 return_ACPI_STATUS(status);
436 }
437
438 #endif /* ACPI_NO_METHOD_EXECUTION */
439
440 /*******************************************************************************
441 *
442 * FUNCTION: acpi_ds_init_object_from_op
443 *
444 * PARAMETERS: walk_state - Current walk state
445 * Op - Parser op used to init the internal object
446 * Opcode - AML opcode associated with the object
447 * ret_obj_desc - Namespace object to be initialized
448 *
449 * RETURN: Status
450 *
451 * DESCRIPTION: Initialize a namespace object from a parser Op and its
452 * associated arguments. The namespace object is a more compact
453 * representation of the Op and its arguments.
454 *
455 ******************************************************************************/
456
457 acpi_status
458 acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
459 union acpi_parse_object *op,
460 u16 opcode,
461 union acpi_operand_object **ret_obj_desc)
462 {
463 const struct acpi_opcode_info *op_info;
464 union acpi_operand_object *obj_desc;
465 acpi_status status = AE_OK;
466
467 ACPI_FUNCTION_TRACE("ds_init_object_from_op");
468
469 obj_desc = *ret_obj_desc;
470 op_info = acpi_ps_get_opcode_info(opcode);
471 if (op_info->class == AML_CLASS_UNKNOWN) {
472 /* Unknown opcode */
473
474 return_ACPI_STATUS(AE_TYPE);
475 }
476
477 /* Perform per-object initialization */
478
479 switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
480 case ACPI_TYPE_BUFFER:
481
482 /*
483 * Defer evaluation of Buffer term_arg operand
484 */
485 obj_desc->buffer.node = (struct acpi_namespace_node *)
486 walk_state->operands[0];
487 obj_desc->buffer.aml_start = op->named.data;
488 obj_desc->buffer.aml_length = op->named.length;
489 break;
490
491 case ACPI_TYPE_PACKAGE:
492
493 /*
494 * Defer evaluation of Package term_arg operand
495 */
496 obj_desc->package.node = (struct acpi_namespace_node *)
497 walk_state->operands[0];
498 obj_desc->package.aml_start = op->named.data;
499 obj_desc->package.aml_length = op->named.length;
500 break;
501
502 case ACPI_TYPE_INTEGER:
503
504 switch (op_info->type) {
505 case AML_TYPE_CONSTANT:
506 /*
507 * Resolve AML Constants here - AND ONLY HERE!
508 * All constants are integers.
509 * We mark the integer with a flag that indicates that it started
510 * life as a constant -- so that stores to constants will perform
511 * as expected (noop). zero_op is used as a placeholder for optional
512 * target operands.
513 */
514 obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
515
516 switch (opcode) {
517 case AML_ZERO_OP:
518
519 obj_desc->integer.value = 0;
520 break;
521
522 case AML_ONE_OP:
523
524 obj_desc->integer.value = 1;
525 break;
526
527 case AML_ONES_OP:
528
529 obj_desc->integer.value = ACPI_INTEGER_MAX;
530
531 /* Truncate value if we are executing from a 32-bit ACPI table */
532
533 #ifndef ACPI_NO_METHOD_EXECUTION
534 acpi_ex_truncate_for32bit_table(obj_desc);
535 #endif
536 break;
537
538 case AML_REVISION_OP:
539
540 obj_desc->integer.value = ACPI_CA_VERSION;
541 break;
542
543 default:
544
545 ACPI_ERROR((AE_INFO,
546 "Unknown constant opcode %X",
547 opcode));
548 status = AE_AML_OPERAND_TYPE;
549 break;
550 }
551 break;
552
553 case AML_TYPE_LITERAL:
554
555 obj_desc->integer.value = op->common.value.integer;
556 #ifndef ACPI_NO_METHOD_EXECUTION
557 acpi_ex_truncate_for32bit_table(obj_desc);
558 #endif
559 break;
560
561 default:
562 ACPI_ERROR((AE_INFO, "Unknown Integer type %X",
563 op_info->type));
564 status = AE_AML_OPERAND_TYPE;
565 break;
566 }
567 break;
568
569 case ACPI_TYPE_STRING:
570
571 obj_desc->string.pointer = op->common.value.string;
572 obj_desc->string.length =
573 (u32) ACPI_STRLEN(op->common.value.string);
574
575 /*
576 * The string is contained in the ACPI table, don't ever try
577 * to delete it
578 */
579 obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
580 break;
581
582 case ACPI_TYPE_METHOD:
583 break;
584
585 case ACPI_TYPE_LOCAL_REFERENCE:
586
587 switch (op_info->type) {
588 case AML_TYPE_LOCAL_VARIABLE:
589
590 /* Split the opcode into a base opcode + offset */
591
592 obj_desc->reference.opcode = AML_LOCAL_OP;
593 obj_desc->reference.offset = opcode - AML_LOCAL_OP;
594
595 #ifndef ACPI_NO_METHOD_EXECUTION
596 status = acpi_ds_method_data_get_node(AML_LOCAL_OP,
597 obj_desc->
598 reference.offset,
599 walk_state,
600 (struct
601 acpi_namespace_node
602 **)&obj_desc->
603 reference.object);
604 #endif
605 break;
606
607 case AML_TYPE_METHOD_ARGUMENT:
608
609 /* Split the opcode into a base opcode + offset */
610
611 obj_desc->reference.opcode = AML_ARG_OP;
612 obj_desc->reference.offset = opcode - AML_ARG_OP;
613
614 #ifndef ACPI_NO_METHOD_EXECUTION
615 status = acpi_ds_method_data_get_node(AML_ARG_OP,
616 obj_desc->
617 reference.offset,
618 walk_state,
619 (struct
620 acpi_namespace_node
621 **)&obj_desc->
622 reference.object);
623 #endif
624 break;
625
626 default: /* Other literals, etc.. */
627
628 if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
629 /* Node was saved in Op */
630
631 obj_desc->reference.node = op->common.node;
632 }
633
634 obj_desc->reference.opcode = opcode;
635 break;
636 }
637 break;
638
639 default:
640
641 ACPI_ERROR((AE_INFO, "Unimplemented data type: %X",
642 ACPI_GET_OBJECT_TYPE(obj_desc)));
643
644 status = AE_AML_OPERAND_TYPE;
645 break;
646 }
647
648 return_ACPI_STATUS(status);
649 }
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