aboutsummaryrefslogtreecommitdiff
path: root/drivers/acpi/executer/excreate.c
blob: c665aa776f830571488055476700a30075a29805 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
/******************************************************************************
 *
 * Module Name: excreate - Named object creation
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2006, R. Byron Moore
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include <acpi/acinterp.h>
#include <acpi/amlcode.h>
#include <acpi/acnamesp.h>
#include <acpi/acevents.h>
#include <acpi/actables.h>

#define _COMPONENT          ACPI_EXECUTER
ACPI_MODULE_NAME("excreate")

#ifndef ACPI_NO_METHOD_EXECUTION
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_create_alias
 *
 * PARAMETERS:  walk_state           - Current state, contains operands
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new named alias
 *
 ******************************************************************************/
acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
{
	struct acpi_namespace_node *target_node;
	struct acpi_namespace_node *alias_node;
	acpi_status status = AE_OK;

	ACPI_FUNCTION_TRACE(ex_create_alias);

	/* Get the source/alias operands (both namespace nodes) */

	alias_node = (struct acpi_namespace_node *)walk_state->operands[0];
	target_node = (struct acpi_namespace_node *)walk_state->operands[1];

	if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
	    (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
		/*
		 * Dereference an existing alias so that we don't create a chain
		 * of aliases.  With this code, we guarantee that an alias is
		 * always exactly one level of indirection away from the
		 * actual aliased name.
		 */
		target_node =
		    ACPI_CAST_PTR(struct acpi_namespace_node,
				  target_node->object);
	}

	/*
	 * For objects that can never change (i.e., the NS node will
	 * permanently point to the same object), we can simply attach
	 * the object to the new NS node.  For other objects (such as
	 * Integers, buffers, etc.), we have to point the Alias node
	 * to the original Node.
	 */
	switch (target_node->type) {
	case ACPI_TYPE_INTEGER:
	case ACPI_TYPE_STRING:
	case ACPI_TYPE_BUFFER:
	case ACPI_TYPE_PACKAGE:
	case ACPI_TYPE_BUFFER_FIELD:

		/*
		 * The new alias has the type ALIAS and points to the original
		 * NS node, not the object itself.  This is because for these
		 * types, the object can change dynamically via a Store.
		 */
		alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
		alias_node->object =
		    ACPI_CAST_PTR(union acpi_operand_object, target_node);
		break;

	case ACPI_TYPE_METHOD:

		/*
		 * The new alias has the type ALIAS and points to the original
		 * NS node, not the object itself.  This is because for these
		 * types, the object can change dynamically via a Store.
		 */
		alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
		alias_node->object =
		    ACPI_CAST_PTR(union acpi_operand_object, target_node);
		break;

	default:

		/* Attach the original source object to the new Alias Node */

		/*
		 * The new alias assumes the type of the target, and it points
		 * to the same object.  The reference count of the object has an
		 * additional reference to prevent deletion out from under either the
		 * target node or the alias Node
		 */
		status = acpi_ns_attach_object(alias_node,
					       acpi_ns_get_attached_object
					       (target_node),
					       target_node->type);
		break;
	}

	/* Since both operands are Nodes, we don't need to delete them */

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_create_event
 *
 * PARAMETERS:  walk_state          - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new event object
 *
 ******************************************************************************/

acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state)
{
	acpi_status status;
	union acpi_operand_object *obj_desc;

	ACPI_FUNCTION_TRACE(ex_create_event);

	obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT);
	if (!obj_desc) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/*
	 * Create the actual OS semaphore, with zero initial units -- meaning
	 * that the event is created in an unsignalled state
	 */
	status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,
					  &obj_desc->event.os_semaphore);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	/* Attach object to the Node */

	status =
	    acpi_ns_attach_object((struct acpi_namespace_node *)walk_state->
				  operands[0], obj_desc, ACPI_TYPE_EVENT);

      cleanup:
	/*
	 * Remove local reference to the object (on error, will cause deletion
	 * of both object and semaphore if present.)
	 */
	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_create_mutex
 *
 * PARAMETERS:  walk_state          - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new mutex object
 *
 *              Mutex (Name[0], sync_level[1])
 *
 ******************************************************************************/

acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
{
	acpi_status status = AE_OK;
	union acpi_operand_object *obj_desc;

	ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);

	/* Create the new mutex object */

	obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);
	if (!obj_desc) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/* Create the actual OS Mutex */

	status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	/* Init object and attach to NS node */

	obj_desc->mutex.sync_level =
	    (u8) walk_state->operands[1]->integer.value;
	obj_desc->mutex.node =
	    (struct acpi_namespace_node *)walk_state->operands[0];

	status =
	    acpi_ns_attach_object(obj_desc->mutex.node, obj_desc,
				  ACPI_TYPE_MUTEX);

      cleanup:
	/*
	 * Remove local reference to the object (on error, will cause deletion
	 * of both object and semaphore if present.)
	 */
	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_create_region
 *
 * PARAMETERS:  aml_start           - Pointer to the region declaration AML
 *              aml_length          - Max length of the declaration AML
 *              region_space        - space_iD for the region
 *              walk_state          - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new operation region object
 *
 ******************************************************************************/

acpi_status
acpi_ex_create_region(u8 * aml_start,
		      u32 aml_length,
		      u8 region_space, struct acpi_walk_state *walk_state)
{
	acpi_status status;
	union acpi_operand_object *obj_desc;
	struct acpi_namespace_node *node;
	union acpi_operand_object *region_obj2;

	ACPI_FUNCTION_TRACE(ex_create_region);

	/* Get the Namespace Node */

	node = walk_state->op->common.node;

	/*
	 * If the region object is already attached to this node,
	 * just return
	 */
	if (acpi_ns_get_attached_object(node)) {
		return_ACPI_STATUS(AE_OK);
	}

	/*
	 * Space ID must be one of the predefined IDs, or in the user-defined
	 * range
	 */
	if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) &&
	    (region_space < ACPI_USER_REGION_BEGIN)) {
		ACPI_ERROR((AE_INFO, "Invalid AddressSpace type %X",
			    region_space));
		return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
	}

	ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (%X)\n",
			  acpi_ut_get_region_name(region_space), region_space));

	/* Create the region descriptor */

	obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
	if (!obj_desc) {
		status = AE_NO_MEMORY;
		goto cleanup;
	}

	/*
	 * Remember location in AML stream of address & length
	 * operands since they need to be evaluated at run time.
	 */
	region_obj2 = obj_desc->common.next_object;
	region_obj2->extra.aml_start = aml_start;
	region_obj2->extra.aml_length = aml_length;

	/* Init the region from the operands */

	obj_desc->region.space_id = region_space;
	obj_desc->region.address = 0;
	obj_desc->region.length = 0;
	obj_desc->region.node = node;

	/* Install the new region object in the parent Node */

	status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);

      cleanup:

	/* Remove local reference to the object */

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_create_table_region
 *
 * PARAMETERS:  walk_state          - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new data_table_region object
 *
 ******************************************************************************/

acpi_status acpi_ex_create_table_region(struct acpi_walk_state *walk_state)
{
	acpi_status status;
	union acpi_operand_object **operand = &walk_state->operands[0];
	union acpi_operand_object *obj_desc;
	struct acpi_namespace_node *node;
	union acpi_operand_object *region_obj2;
	acpi_native_uint table_index;
	struct acpi_table_header *table;

	ACPI_FUNCTION_TRACE(ex_create_table_region);

	/* Get the Node from the object stack  */

	node = walk_state->op->common.node;

	/*
	 * If the region object is already attached to this node,
	 * just return
	 */
	if (acpi_ns_get_attached_object(node)) {
		return_ACPI_STATUS(AE_OK);
	}

	/* Find the ACPI table */

	status = acpi_tb_find_table(operand[1]->string.pointer,
				    operand[2]->string.pointer,
				    operand[3]->string.pointer, &table_index);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Create the region descriptor */

	obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
	if (!obj_desc) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	region_obj2 = obj_desc->common.next_object;
	region_obj2->extra.region_context = NULL;

	status = acpi_get_table_by_index(table_index, &table);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Init the region from the operands */

	obj_desc->region.space_id = REGION_DATA_TABLE;
	obj_desc->region.address =
	    (acpi_physical_address) ACPI_TO_INTEGER(table);
	obj_desc->region.length = table->length;
	obj_desc->region.node = node;
	obj_desc->region.flags = AOPOBJ_DATA_VALID;

	/* Install the new region object in the parent Node */

	status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);
	if (ACPI_FAILURE(status)) {
		goto cleanup;
	}

	status = acpi_ev_initialize_region(obj_desc, FALSE);
	if (ACPI_FAILURE(status)) {
		if (status == AE_NOT_EXIST) {
			status = AE_OK;
		} else {
			goto cleanup;
		}
	}

	obj_desc->region.flags |= AOPOBJ_SETUP_COMPLETE;

      cleanup:

	/* Remove local reference to the object */

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_create_processor
 *
 * PARAMETERS:  walk_state          - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new processor object and populate the fields
 *
 *              Processor (Name[0], cpu_iD[1], pblock_addr[2], pblock_length[3])
 *
 ******************************************************************************/

acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state)
{
	union acpi_operand_object **operand = &walk_state->operands[0];
	union acpi_operand_object *obj_desc;
	acpi_status status;

	ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state);

	/* Create the processor object */

	obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR);
	if (!obj_desc) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/* Initialize the processor object from the operands */

	obj_desc->processor.proc_id = (u8) operand[1]->integer.value;
	obj_desc->processor.length = (u8) operand[3]->integer.value;
	obj_desc->processor.address =
	    (acpi_io_address) operand[2]->integer.value;

	/* Install the processor object in the parent Node */

	status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
				       obj_desc, ACPI_TYPE_PROCESSOR);

	/* Remove local reference to the object */

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_create_power_resource
 *
 * PARAMETERS:  walk_state          - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new power_resource object and populate the fields
 *
 *              power_resource (Name[0], system_level[1], resource_order[2])
 *
 ******************************************************************************/

acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state)
{
	union acpi_operand_object **operand = &walk_state->operands[0];
	acpi_status status;
	union acpi_operand_object *obj_desc;

	ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state);

	/* Create the power resource object */

	obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER);
	if (!obj_desc) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}

	/* Initialize the power object from the operands */

	obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
	obj_desc->power_resource.resource_order =
	    (u16) operand[2]->integer.value;

	/* Install the  power resource object in the parent Node */

	status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
				       obj_desc, ACPI_TYPE_POWER);

	/* Remove local reference to the object */

	acpi_ut_remove_reference(obj_desc);
	return_ACPI_STATUS(status);
}
#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_create_method
 *
 * PARAMETERS:  aml_start       - First byte of the method's AML
 *              aml_length      - AML byte count for this method
 *              walk_state      - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new method object
 *
 ******************************************************************************/

acpi_status
acpi_ex_create_method(u8 * aml_start,
		      u32 aml_length, struct acpi_walk_state *walk_state)
{
	union acpi_operand_object **operand = &walk_state->operands[0];
	union acpi_operand_object *obj_desc;
	acpi_status status;
	u8 method_flags;

	ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state);

	/* Create a new method object */

	obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
	if (!obj_desc) {
		status = AE_NO_MEMORY;
		goto exit;
	}

	/* Save the method's AML pointer and length  */

	obj_desc->method.aml_start = aml_start;
	obj_desc->method.aml_length = aml_length;

	/*
	 * Disassemble the method flags. Split off the Arg Count
	 * for efficiency
	 */
	method_flags = (u8) operand[1]->integer.value;

	obj_desc->method.method_flags =
	    (u8) (method_flags & ~AML_METHOD_ARG_COUNT);
	obj_desc->method.param_count =
	    (u8) (method_flags & AML_METHOD_ARG_COUNT);

	/*
	 * Get the sync_level. If method is serialized, a mutex will be
	 * created for this method when it is parsed.
	 */
	if (method_flags & AML_METHOD_SERIALIZED) {
		/*
		 * ACPI 1.0: sync_level = 0
		 * ACPI 2.0: sync_level = sync_level in method declaration
		 */
		obj_desc->method.sync_level = (u8)
		    ((method_flags & AML_METHOD_SYNCH_LEVEL) >> 4);
	}

	/* Attach the new object to the method Node */

	status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
				       obj_desc, ACPI_TYPE_METHOD);

	/* Remove local reference to the object */

	acpi_ut_remove_reference(obj_desc);

      exit:
	/* Remove a reference to the operand */

	acpi_ut_remove_reference(operand[1]);
	return_ACPI_STATUS(status);
}