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1/******************************************************************************
2 *
3 * Module Name: excreate - Named object creation
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, Intel Corp.
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 "accommon.h"
46#include "acinterp.h"
47#include "amlcode.h"
48#include "acnamesp.h"
49
50#define _COMPONENT ACPI_EXECUTER
51ACPI_MODULE_NAME("excreate")
52#ifndef ACPI_NO_METHOD_EXECUTION
53/*******************************************************************************
54 *
55 * FUNCTION: acpi_ex_create_alias
56 *
57 * PARAMETERS: walk_state - Current state, contains operands
58 *
59 * RETURN: Status
60 *
61 * DESCRIPTION: Create a new named alias
62 *
63 ******************************************************************************/
64acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
65{
66 struct acpi_namespace_node *target_node;
67 struct acpi_namespace_node *alias_node;
68 acpi_status status = AE_OK;
69
70 ACPI_FUNCTION_TRACE(ex_create_alias);
71
72 /* Get the source/alias operands (both namespace nodes) */
73
74 alias_node = (struct acpi_namespace_node *)walk_state->operands[0];
75 target_node = (struct acpi_namespace_node *)walk_state->operands[1];
76
77 if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
78 (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
79 /*
80 * Dereference an existing alias so that we don't create a chain
81 * of aliases. With this code, we guarantee that an alias is
82 * always exactly one level of indirection away from the
83 * actual aliased name.
84 */
85 target_node =
86 ACPI_CAST_PTR(struct acpi_namespace_node,
87 target_node->object);
88 }
89
90 /*
91 * For objects that can never change (i.e., the NS node will
92 * permanently point to the same object), we can simply attach
93 * the object to the new NS node. For other objects (such as
94 * Integers, buffers, etc.), we have to point the Alias node
95 * to the original Node.
96 */
97 switch (target_node->type) {
98
99 /* For these types, the sub-object can change dynamically via a Store */
100
101 case ACPI_TYPE_INTEGER:
102 case ACPI_TYPE_STRING:
103 case ACPI_TYPE_BUFFER:
104 case ACPI_TYPE_PACKAGE:
105 case ACPI_TYPE_BUFFER_FIELD:
106 /*
107 * These types open a new scope, so we need the NS node in order to access
108 * any children.
109 */
110 case ACPI_TYPE_DEVICE:
111 case ACPI_TYPE_POWER:
112 case ACPI_TYPE_PROCESSOR:
113 case ACPI_TYPE_THERMAL:
114 case ACPI_TYPE_LOCAL_SCOPE:
115 /*
116 * The new alias has the type ALIAS and points to the original
117 * NS node, not the object itself.
118 */
119 alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
120 alias_node->object =
121 ACPI_CAST_PTR(union acpi_operand_object, target_node);
122 break;
123
124 case ACPI_TYPE_METHOD:
125 /*
126 * Control method aliases need to be differentiated
127 */
128 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
129 alias_node->object =
130 ACPI_CAST_PTR(union acpi_operand_object, target_node);
131 break;
132
133 default:
134
135 /* Attach the original source object to the new Alias Node */
136
137 /*
138 * The new alias assumes the type of the target, and it points
139 * to the same object. The reference count of the object has an
140 * additional reference to prevent deletion out from under either the
141 * target node or the alias Node
142 */
143 status = acpi_ns_attach_object(alias_node,
144 acpi_ns_get_attached_object
145 (target_node),
146 target_node->type);
147 break;
148 }
149
150 /* Since both operands are Nodes, we don't need to delete them */
151
152 return_ACPI_STATUS(status);
153}
154
155/*******************************************************************************
156 *
157 * FUNCTION: acpi_ex_create_event
158 *
159 * PARAMETERS: walk_state - Current state
160 *
161 * RETURN: Status
162 *
163 * DESCRIPTION: Create a new event object
164 *
165 ******************************************************************************/
166
167acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state)
168{
169 acpi_status status;
170 union acpi_operand_object *obj_desc;
171
172 ACPI_FUNCTION_TRACE(ex_create_event);
173
174 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT);
175 if (!obj_desc) {
176 status = AE_NO_MEMORY;
177 goto cleanup;
178 }
179
180 /*
181 * Create the actual OS semaphore, with zero initial units -- meaning
182 * that the event is created in an unsignalled state
183 */
184 status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,
185 &obj_desc->event.os_semaphore);
186 if (ACPI_FAILURE(status)) {
187 goto cleanup;
188 }
189
190 /* Attach object to the Node */
191
192 status = acpi_ns_attach_object((struct acpi_namespace_node *)
193 walk_state->operands[0], obj_desc,
194 ACPI_TYPE_EVENT);
195
196cleanup:
197 /*
198 * Remove local reference to the object (on error, will cause deletion
199 * of both object and semaphore if present.)
200 */
201 acpi_ut_remove_reference(obj_desc);
202 return_ACPI_STATUS(status);
203}
204
205/*******************************************************************************
206 *
207 * FUNCTION: acpi_ex_create_mutex
208 *
209 * PARAMETERS: walk_state - Current state
210 *
211 * RETURN: Status
212 *
213 * DESCRIPTION: Create a new mutex object
214 *
215 * Mutex (Name[0], sync_level[1])
216 *
217 ******************************************************************************/
218
219acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
220{
221 acpi_status status = AE_OK;
222 union acpi_operand_object *obj_desc;
223
224 ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);
225
226 /* Create the new mutex object */
227
228 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);
229 if (!obj_desc) {
230 status = AE_NO_MEMORY;
231 goto cleanup;
232 }
233
234 /* Create the actual OS Mutex */
235
236 status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex);
237 if (ACPI_FAILURE(status)) {
238 goto cleanup;
239 }
240
241 /* Init object and attach to NS node */
242
243 obj_desc->mutex.sync_level = (u8)walk_state->operands[1]->integer.value;
244 obj_desc->mutex.node =
245 (struct acpi_namespace_node *)walk_state->operands[0];
246
247 status =
248 acpi_ns_attach_object(obj_desc->mutex.node, obj_desc,
249 ACPI_TYPE_MUTEX);
250
251cleanup:
252 /*
253 * Remove local reference to the object (on error, will cause deletion
254 * of both object and semaphore if present.)
255 */
256 acpi_ut_remove_reference(obj_desc);
257 return_ACPI_STATUS(status);
258}
259
260/*******************************************************************************
261 *
262 * FUNCTION: acpi_ex_create_region
263 *
264 * PARAMETERS: aml_start - Pointer to the region declaration AML
265 * aml_length - Max length of the declaration AML
266 * space_id - Address space ID for the region
267 * walk_state - Current state
268 *
269 * RETURN: Status
270 *
271 * DESCRIPTION: Create a new operation region object
272 *
273 ******************************************************************************/
274
275acpi_status
276acpi_ex_create_region(u8 * aml_start,
277 u32 aml_length,
278 u8 space_id, struct acpi_walk_state *walk_state)
279{
280 acpi_status status;
281 union acpi_operand_object *obj_desc;
282 struct acpi_namespace_node *node;
283 union acpi_operand_object *region_obj2;
284
285 ACPI_FUNCTION_TRACE(ex_create_region);
286
287 /* Get the Namespace Node */
288
289 node = walk_state->op->common.node;
290
291 /*
292 * If the region object is already attached to this node,
293 * just return
294 */
295 if (acpi_ns_get_attached_object(node)) {
296 return_ACPI_STATUS(AE_OK);
297 }
298
299 /*
300 * Space ID must be one of the predefined IDs, or in the user-defined
301 * range
302 */
303 if (!acpi_is_valid_space_id(space_id)) {
304 /*
305 * Print an error message, but continue. We don't want to abort
306 * a table load for this exception. Instead, if the region is
307 * actually used at runtime, abort the executing method.
308 */
309 ACPI_ERROR((AE_INFO,
310 "Invalid/unknown Address Space ID: 0x%2.2X",
311 space_id));
312 }
313
314 ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
315 acpi_ut_get_region_name(space_id), space_id));
316
317 /* Create the region descriptor */
318
319 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
320 if (!obj_desc) {
321 status = AE_NO_MEMORY;
322 goto cleanup;
323 }
324
325 /*
326 * Remember location in AML stream of address & length
327 * operands since they need to be evaluated at run time.
328 */
329 region_obj2 = acpi_ns_get_secondary_object(obj_desc);
330 region_obj2->extra.aml_start = aml_start;
331 region_obj2->extra.aml_length = aml_length;
332 region_obj2->extra.method_REG = NULL;
333 if (walk_state->scope_info) {
334 region_obj2->extra.scope_node =
335 walk_state->scope_info->scope.node;
336 } else {
337 region_obj2->extra.scope_node = node;
338 }
339
340 /* Init the region from the operands */
341
342 obj_desc->region.space_id = space_id;
343 obj_desc->region.address = 0;
344 obj_desc->region.length = 0;
345 obj_desc->region.node = node;
346 obj_desc->region.handler = NULL;
347 obj_desc->common.flags &=
348 ~(AOPOBJ_SETUP_COMPLETE | AOPOBJ_REG_CONNECTED |
349 AOPOBJ_OBJECT_INITIALIZED);
350
351 /* Install the new region object in the parent Node */
352
353 status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);
354
355cleanup:
356
357 /* Remove local reference to the object */
358
359 acpi_ut_remove_reference(obj_desc);
360 return_ACPI_STATUS(status);
361}
362
363/*******************************************************************************
364 *
365 * FUNCTION: acpi_ex_create_processor
366 *
367 * PARAMETERS: walk_state - Current state
368 *
369 * RETURN: Status
370 *
371 * DESCRIPTION: Create a new processor object and populate the fields
372 *
373 * Processor (Name[0], cpu_ID[1], pblock_addr[2], pblock_length[3])
374 *
375 ******************************************************************************/
376
377acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state)
378{
379 union acpi_operand_object **operand = &walk_state->operands[0];
380 union acpi_operand_object *obj_desc;
381 acpi_status status;
382
383 ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state);
384
385 /* Create the processor object */
386
387 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR);
388 if (!obj_desc) {
389 return_ACPI_STATUS(AE_NO_MEMORY);
390 }
391
392 /* Initialize the processor object from the operands */
393
394 obj_desc->processor.proc_id = (u8) operand[1]->integer.value;
395 obj_desc->processor.length = (u8) operand[3]->integer.value;
396 obj_desc->processor.address =
397 (acpi_io_address) operand[2]->integer.value;
398
399 /* Install the processor object in the parent Node */
400
401 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
402 obj_desc, ACPI_TYPE_PROCESSOR);
403
404 /* Remove local reference to the object */
405
406 acpi_ut_remove_reference(obj_desc);
407 return_ACPI_STATUS(status);
408}
409
410/*******************************************************************************
411 *
412 * FUNCTION: acpi_ex_create_power_resource
413 *
414 * PARAMETERS: walk_state - Current state
415 *
416 * RETURN: Status
417 *
418 * DESCRIPTION: Create a new power_resource object and populate the fields
419 *
420 * power_resource (Name[0], system_level[1], resource_order[2])
421 *
422 ******************************************************************************/
423
424acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state)
425{
426 union acpi_operand_object **operand = &walk_state->operands[0];
427 acpi_status status;
428 union acpi_operand_object *obj_desc;
429
430 ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state);
431
432 /* Create the power resource object */
433
434 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER);
435 if (!obj_desc) {
436 return_ACPI_STATUS(AE_NO_MEMORY);
437 }
438
439 /* Initialize the power object from the operands */
440
441 obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
442 obj_desc->power_resource.resource_order =
443 (u16) operand[2]->integer.value;
444
445 /* Install the power resource object in the parent Node */
446
447 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
448 obj_desc, ACPI_TYPE_POWER);
449
450 /* Remove local reference to the object */
451
452 acpi_ut_remove_reference(obj_desc);
453 return_ACPI_STATUS(status);
454}
455#endif
456
457/*******************************************************************************
458 *
459 * FUNCTION: acpi_ex_create_method
460 *
461 * PARAMETERS: aml_start - First byte of the method's AML
462 * aml_length - AML byte count for this method
463 * walk_state - Current state
464 *
465 * RETURN: Status
466 *
467 * DESCRIPTION: Create a new method object
468 *
469 ******************************************************************************/
470
471acpi_status
472acpi_ex_create_method(u8 * aml_start,
473 u32 aml_length, struct acpi_walk_state *walk_state)
474{
475 union acpi_operand_object **operand = &walk_state->operands[0];
476 union acpi_operand_object *obj_desc;
477 acpi_status status;
478 u8 method_flags;
479
480 ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state);
481
482 /* Create a new method object */
483
484 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
485 if (!obj_desc) {
486 status = AE_NO_MEMORY;
487 goto exit;
488 }
489
490 /* Save the method's AML pointer and length */
491
492 obj_desc->method.aml_start = aml_start;
493 obj_desc->method.aml_length = aml_length;
494 obj_desc->method.node = operand[0];
495
496 /*
497 * Disassemble the method flags. Split off the arg_count, Serialized
498 * flag, and sync_level for efficiency.
499 */
500 method_flags = (u8)operand[1]->integer.value;
501 obj_desc->method.param_count = (u8)
502 (method_flags & AML_METHOD_ARG_COUNT);
503
504 /*
505 * Get the sync_level. If method is serialized, a mutex will be
506 * created for this method when it is parsed.
507 */
508 if (method_flags & AML_METHOD_SERIALIZED) {
509 obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED;
510
511 /*
512 * ACPI 1.0: sync_level = 0
513 * ACPI 2.0: sync_level = sync_level in method declaration
514 */
515 obj_desc->method.sync_level = (u8)
516 ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4);
517 }
518
519 /* Attach the new object to the method Node */
520
521 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
522 obj_desc, ACPI_TYPE_METHOD);
523
524 /* Remove local reference to the object */
525
526 acpi_ut_remove_reference(obj_desc);
527
528exit:
529 /* Remove a reference to the operand */
530
531 acpi_ut_remove_reference(operand[1]);
532 return_ACPI_STATUS(status);
533}
1/******************************************************************************
2 *
3 * Module Name: excreate - Named object creation
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, Intel Corp.
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 "accommon.h"
46#include "acinterp.h"
47#include "amlcode.h"
48#include "acnamesp.h"
49
50#define _COMPONENT ACPI_EXECUTER
51ACPI_MODULE_NAME("excreate")
52#ifndef ACPI_NO_METHOD_EXECUTION
53/*******************************************************************************
54 *
55 * FUNCTION: acpi_ex_create_alias
56 *
57 * PARAMETERS: walk_state - Current state, contains operands
58 *
59 * RETURN: Status
60 *
61 * DESCRIPTION: Create a new named alias
62 *
63 ******************************************************************************/
64acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
65{
66 struct acpi_namespace_node *target_node;
67 struct acpi_namespace_node *alias_node;
68 acpi_status status = AE_OK;
69
70 ACPI_FUNCTION_TRACE(ex_create_alias);
71
72 /* Get the source/alias operands (both namespace nodes) */
73
74 alias_node = (struct acpi_namespace_node *)walk_state->operands[0];
75 target_node = (struct acpi_namespace_node *)walk_state->operands[1];
76
77 if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
78 (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
79 /*
80 * Dereference an existing alias so that we don't create a chain
81 * of aliases. With this code, we guarantee that an alias is
82 * always exactly one level of indirection away from the
83 * actual aliased name.
84 */
85 target_node =
86 ACPI_CAST_PTR(struct acpi_namespace_node,
87 target_node->object);
88 }
89
90 /*
91 * For objects that can never change (i.e., the NS node will
92 * permanently point to the same object), we can simply attach
93 * the object to the new NS node. For other objects (such as
94 * Integers, buffers, etc.), we have to point the Alias node
95 * to the original Node.
96 */
97 switch (target_node->type) {
98
99 /* For these types, the sub-object can change dynamically via a Store */
100
101 case ACPI_TYPE_INTEGER:
102 case ACPI_TYPE_STRING:
103 case ACPI_TYPE_BUFFER:
104 case ACPI_TYPE_PACKAGE:
105 case ACPI_TYPE_BUFFER_FIELD:
106
107 /*
108 * These types open a new scope, so we need the NS node in order to access
109 * any children.
110 */
111 case ACPI_TYPE_DEVICE:
112 case ACPI_TYPE_POWER:
113 case ACPI_TYPE_PROCESSOR:
114 case ACPI_TYPE_THERMAL:
115 case ACPI_TYPE_LOCAL_SCOPE:
116
117 /*
118 * The new alias has the type ALIAS and points to the original
119 * NS node, not the object itself.
120 */
121 alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
122 alias_node->object =
123 ACPI_CAST_PTR(union acpi_operand_object, target_node);
124 break;
125
126 case ACPI_TYPE_METHOD:
127
128 /*
129 * Control method aliases need to be differentiated
130 */
131 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
132 alias_node->object =
133 ACPI_CAST_PTR(union acpi_operand_object, target_node);
134 break;
135
136 default:
137
138 /* Attach the original source object to the new Alias Node */
139
140 /*
141 * The new alias assumes the type of the target, and it points
142 * to the same object. The reference count of the object has an
143 * additional reference to prevent deletion out from under either the
144 * target node or the alias Node
145 */
146 status = acpi_ns_attach_object(alias_node,
147 acpi_ns_get_attached_object
148 (target_node),
149 target_node->type);
150 break;
151 }
152
153 /* Since both operands are Nodes, we don't need to delete them */
154
155 return_ACPI_STATUS(status);
156}
157
158/*******************************************************************************
159 *
160 * FUNCTION: acpi_ex_create_event
161 *
162 * PARAMETERS: walk_state - Current state
163 *
164 * RETURN: Status
165 *
166 * DESCRIPTION: Create a new event object
167 *
168 ******************************************************************************/
169
170acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state)
171{
172 acpi_status status;
173 union acpi_operand_object *obj_desc;
174
175 ACPI_FUNCTION_TRACE(ex_create_event);
176
177 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT);
178 if (!obj_desc) {
179 status = AE_NO_MEMORY;
180 goto cleanup;
181 }
182
183 /*
184 * Create the actual OS semaphore, with zero initial units -- meaning
185 * that the event is created in an unsignalled state
186 */
187 status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,
188 &obj_desc->event.os_semaphore);
189 if (ACPI_FAILURE(status)) {
190 goto cleanup;
191 }
192
193 /* Attach object to the Node */
194
195 status =
196 acpi_ns_attach_object((struct acpi_namespace_node *)walk_state->
197 operands[0], obj_desc, ACPI_TYPE_EVENT);
198
199 cleanup:
200 /*
201 * Remove local reference to the object (on error, will cause deletion
202 * of both object and semaphore if present.)
203 */
204 acpi_ut_remove_reference(obj_desc);
205 return_ACPI_STATUS(status);
206}
207
208/*******************************************************************************
209 *
210 * FUNCTION: acpi_ex_create_mutex
211 *
212 * PARAMETERS: walk_state - Current state
213 *
214 * RETURN: Status
215 *
216 * DESCRIPTION: Create a new mutex object
217 *
218 * Mutex (Name[0], sync_level[1])
219 *
220 ******************************************************************************/
221
222acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
223{
224 acpi_status status = AE_OK;
225 union acpi_operand_object *obj_desc;
226
227 ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);
228
229 /* Create the new mutex object */
230
231 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);
232 if (!obj_desc) {
233 status = AE_NO_MEMORY;
234 goto cleanup;
235 }
236
237 /* Create the actual OS Mutex */
238
239 status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex);
240 if (ACPI_FAILURE(status)) {
241 goto cleanup;
242 }
243
244 /* Init object and attach to NS node */
245
246 obj_desc->mutex.sync_level =
247 (u8) walk_state->operands[1]->integer.value;
248 obj_desc->mutex.node =
249 (struct acpi_namespace_node *)walk_state->operands[0];
250
251 status =
252 acpi_ns_attach_object(obj_desc->mutex.node, obj_desc,
253 ACPI_TYPE_MUTEX);
254
255 cleanup:
256 /*
257 * Remove local reference to the object (on error, will cause deletion
258 * of both object and semaphore if present.)
259 */
260 acpi_ut_remove_reference(obj_desc);
261 return_ACPI_STATUS(status);
262}
263
264/*******************************************************************************
265 *
266 * FUNCTION: acpi_ex_create_region
267 *
268 * PARAMETERS: aml_start - Pointer to the region declaration AML
269 * aml_length - Max length of the declaration AML
270 * space_id - Address space ID for the region
271 * walk_state - Current state
272 *
273 * RETURN: Status
274 *
275 * DESCRIPTION: Create a new operation region object
276 *
277 ******************************************************************************/
278
279acpi_status
280acpi_ex_create_region(u8 * aml_start,
281 u32 aml_length,
282 u8 space_id, struct acpi_walk_state *walk_state)
283{
284 acpi_status status;
285 union acpi_operand_object *obj_desc;
286 struct acpi_namespace_node *node;
287 union acpi_operand_object *region_obj2;
288
289 ACPI_FUNCTION_TRACE(ex_create_region);
290
291 /* Get the Namespace Node */
292
293 node = walk_state->op->common.node;
294
295 /*
296 * If the region object is already attached to this node,
297 * just return
298 */
299 if (acpi_ns_get_attached_object(node)) {
300 return_ACPI_STATUS(AE_OK);
301 }
302
303 /*
304 * Space ID must be one of the predefined IDs, or in the user-defined
305 * range
306 */
307 if (!acpi_is_valid_space_id(space_id)) {
308 /*
309 * Print an error message, but continue. We don't want to abort
310 * a table load for this exception. Instead, if the region is
311 * actually used at runtime, abort the executing method.
312 */
313 ACPI_ERROR((AE_INFO,
314 "Invalid/unknown Address Space ID: 0x%2.2X",
315 space_id));
316 }
317
318 ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
319 acpi_ut_get_region_name(space_id), space_id));
320
321 /* Create the region descriptor */
322
323 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
324 if (!obj_desc) {
325 status = AE_NO_MEMORY;
326 goto cleanup;
327 }
328
329 /*
330 * Remember location in AML stream of address & length
331 * operands since they need to be evaluated at run time.
332 */
333 region_obj2 = obj_desc->common.next_object;
334 region_obj2->extra.aml_start = aml_start;
335 region_obj2->extra.aml_length = aml_length;
336 if (walk_state->scope_info) {
337 region_obj2->extra.scope_node =
338 walk_state->scope_info->scope.node;
339 } else {
340 region_obj2->extra.scope_node = node;
341 }
342
343 /* Init the region from the operands */
344
345 obj_desc->region.space_id = space_id;
346 obj_desc->region.address = 0;
347 obj_desc->region.length = 0;
348 obj_desc->region.node = node;
349
350 /* Install the new region object in the parent Node */
351
352 status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);
353
354 cleanup:
355
356 /* Remove local reference to the object */
357
358 acpi_ut_remove_reference(obj_desc);
359 return_ACPI_STATUS(status);
360}
361
362/*******************************************************************************
363 *
364 * FUNCTION: acpi_ex_create_processor
365 *
366 * PARAMETERS: walk_state - Current state
367 *
368 * RETURN: Status
369 *
370 * DESCRIPTION: Create a new processor object and populate the fields
371 *
372 * Processor (Name[0], cpu_iD[1], pblock_addr[2], pblock_length[3])
373 *
374 ******************************************************************************/
375
376acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state)
377{
378 union acpi_operand_object **operand = &walk_state->operands[0];
379 union acpi_operand_object *obj_desc;
380 acpi_status status;
381
382 ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state);
383
384 /* Create the processor object */
385
386 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR);
387 if (!obj_desc) {
388 return_ACPI_STATUS(AE_NO_MEMORY);
389 }
390
391 /* Initialize the processor object from the operands */
392
393 obj_desc->processor.proc_id = (u8) operand[1]->integer.value;
394 obj_desc->processor.length = (u8) operand[3]->integer.value;
395 obj_desc->processor.address =
396 (acpi_io_address) operand[2]->integer.value;
397
398 /* Install the processor object in the parent Node */
399
400 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
401 obj_desc, ACPI_TYPE_PROCESSOR);
402
403 /* Remove local reference to the object */
404
405 acpi_ut_remove_reference(obj_desc);
406 return_ACPI_STATUS(status);
407}
408
409/*******************************************************************************
410 *
411 * FUNCTION: acpi_ex_create_power_resource
412 *
413 * PARAMETERS: walk_state - Current state
414 *
415 * RETURN: Status
416 *
417 * DESCRIPTION: Create a new power_resource object and populate the fields
418 *
419 * power_resource (Name[0], system_level[1], resource_order[2])
420 *
421 ******************************************************************************/
422
423acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state)
424{
425 union acpi_operand_object **operand = &walk_state->operands[0];
426 acpi_status status;
427 union acpi_operand_object *obj_desc;
428
429 ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state);
430
431 /* Create the power resource object */
432
433 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER);
434 if (!obj_desc) {
435 return_ACPI_STATUS(AE_NO_MEMORY);
436 }
437
438 /* Initialize the power object from the operands */
439
440 obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
441 obj_desc->power_resource.resource_order =
442 (u16) operand[2]->integer.value;
443
444 /* Install the power resource object in the parent Node */
445
446 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
447 obj_desc, ACPI_TYPE_POWER);
448
449 /* Remove local reference to the object */
450
451 acpi_ut_remove_reference(obj_desc);
452 return_ACPI_STATUS(status);
453}
454#endif
455
456/*******************************************************************************
457 *
458 * FUNCTION: acpi_ex_create_method
459 *
460 * PARAMETERS: aml_start - First byte of the method's AML
461 * aml_length - AML byte count for this method
462 * walk_state - Current state
463 *
464 * RETURN: Status
465 *
466 * DESCRIPTION: Create a new method object
467 *
468 ******************************************************************************/
469
470acpi_status
471acpi_ex_create_method(u8 * aml_start,
472 u32 aml_length, struct acpi_walk_state *walk_state)
473{
474 union acpi_operand_object **operand = &walk_state->operands[0];
475 union acpi_operand_object *obj_desc;
476 acpi_status status;
477 u8 method_flags;
478
479 ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state);
480
481 /* Create a new method object */
482
483 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
484 if (!obj_desc) {
485 status = AE_NO_MEMORY;
486 goto exit;
487 }
488
489 /* Save the method's AML pointer and length */
490
491 obj_desc->method.aml_start = aml_start;
492 obj_desc->method.aml_length = aml_length;
493
494 /*
495 * Disassemble the method flags. Split off the arg_count, Serialized
496 * flag, and sync_level for efficiency.
497 */
498 method_flags = (u8) operand[1]->integer.value;
499
500 obj_desc->method.param_count =
501 (u8) (method_flags & AML_METHOD_ARG_COUNT);
502
503 /*
504 * Get the sync_level. If method is serialized, a mutex will be
505 * created for this method when it is parsed.
506 */
507 if (method_flags & AML_METHOD_SERIALIZED) {
508 obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED;
509
510 /*
511 * ACPI 1.0: sync_level = 0
512 * ACPI 2.0: sync_level = sync_level in method declaration
513 */
514 obj_desc->method.sync_level = (u8)
515 ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4);
516 }
517
518 /* Attach the new object to the method Node */
519
520 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
521 obj_desc, ACPI_TYPE_METHOD);
522
523 /* Remove local reference to the object */
524
525 acpi_ut_remove_reference(obj_desc);
526
527 exit:
528 /* Remove a reference to the operand */
529
530 acpi_ut_remove_reference(operand[1]);
531 return_ACPI_STATUS(status);
532}