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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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: excreate - Named object creation
5 *
6 * Copyright (C) 2000 - 2021, Intel Corp.
7 *
8 *****************************************************************************/
9
10#include <acpi/acpi.h>
11#include "accommon.h"
12#include "acinterp.h"
13#include "amlcode.h"
14#include "acnamesp.h"
15
16#define _COMPONENT ACPI_EXECUTER
17ACPI_MODULE_NAME("excreate")
18/*******************************************************************************
19 *
20 * FUNCTION: acpi_ex_create_alias
21 *
22 * PARAMETERS: walk_state - Current state, contains operands
23 *
24 * RETURN: Status
25 *
26 * DESCRIPTION: Create a new named alias
27 *
28 ******************************************************************************/
29acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
30{
31 struct acpi_namespace_node *target_node;
32 struct acpi_namespace_node *alias_node;
33 acpi_status status = AE_OK;
34
35 ACPI_FUNCTION_TRACE(ex_create_alias);
36
37 /* Get the source/alias operands (both namespace nodes) */
38
39 alias_node = (struct acpi_namespace_node *)walk_state->operands[0];
40 target_node = (struct acpi_namespace_node *)walk_state->operands[1];
41
42 if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
43 (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
44 /*
45 * Dereference an existing alias so that we don't create a chain
46 * of aliases. With this code, we guarantee that an alias is
47 * always exactly one level of indirection away from the
48 * actual aliased name.
49 */
50 target_node =
51 ACPI_CAST_PTR(struct acpi_namespace_node,
52 target_node->object);
53 }
54
55 /* Ensure that the target node is valid */
56
57 if (!target_node) {
58 return_ACPI_STATUS(AE_NULL_OBJECT);
59 }
60
61 /* Construct the alias object (a namespace node) */
62
63 switch (target_node->type) {
64 case ACPI_TYPE_METHOD:
65 /*
66 * Control method aliases need to be differentiated with
67 * a special type
68 */
69 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
70 break;
71
72 default:
73 /*
74 * All other object types.
75 *
76 * The new alias has the type ALIAS and points to the original
77 * NS node, not the object itself.
78 */
79 alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
80 alias_node->object =
81 ACPI_CAST_PTR(union acpi_operand_object, target_node);
82 break;
83 }
84
85 /* Since both operands are Nodes, we don't need to delete them */
86
87 alias_node->object =
88 ACPI_CAST_PTR(union acpi_operand_object, target_node);
89 return_ACPI_STATUS(status);
90}
91
92/*******************************************************************************
93 *
94 * FUNCTION: acpi_ex_create_event
95 *
96 * PARAMETERS: walk_state - Current state
97 *
98 * RETURN: Status
99 *
100 * DESCRIPTION: Create a new event object
101 *
102 ******************************************************************************/
103
104acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state)
105{
106 acpi_status status;
107 union acpi_operand_object *obj_desc;
108
109 ACPI_FUNCTION_TRACE(ex_create_event);
110
111 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT);
112 if (!obj_desc) {
113 status = AE_NO_MEMORY;
114 goto cleanup;
115 }
116
117 /*
118 * Create the actual OS semaphore, with zero initial units -- meaning
119 * that the event is created in an unsignalled state
120 */
121 status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,
122 &obj_desc->event.os_semaphore);
123 if (ACPI_FAILURE(status)) {
124 goto cleanup;
125 }
126
127 /* Attach object to the Node */
128
129 status = acpi_ns_attach_object((struct acpi_namespace_node *)
130 walk_state->operands[0], obj_desc,
131 ACPI_TYPE_EVENT);
132
133cleanup:
134 /*
135 * Remove local reference to the object (on error, will cause deletion
136 * of both object and semaphore if present.)
137 */
138 acpi_ut_remove_reference(obj_desc);
139 return_ACPI_STATUS(status);
140}
141
142/*******************************************************************************
143 *
144 * FUNCTION: acpi_ex_create_mutex
145 *
146 * PARAMETERS: walk_state - Current state
147 *
148 * RETURN: Status
149 *
150 * DESCRIPTION: Create a new mutex object
151 *
152 * Mutex (Name[0], sync_level[1])
153 *
154 ******************************************************************************/
155
156acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
157{
158 acpi_status status = AE_OK;
159 union acpi_operand_object *obj_desc;
160
161 ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);
162
163 /* Create the new mutex object */
164
165 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);
166 if (!obj_desc) {
167 status = AE_NO_MEMORY;
168 goto cleanup;
169 }
170
171 /* Create the actual OS Mutex */
172
173 status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex);
174 if (ACPI_FAILURE(status)) {
175 goto cleanup;
176 }
177
178 /* Init object and attach to NS node */
179
180 obj_desc->mutex.sync_level = (u8)walk_state->operands[1]->integer.value;
181 obj_desc->mutex.node =
182 (struct acpi_namespace_node *)walk_state->operands[0];
183
184 status =
185 acpi_ns_attach_object(obj_desc->mutex.node, obj_desc,
186 ACPI_TYPE_MUTEX);
187
188cleanup:
189 /*
190 * Remove local reference to the object (on error, will cause deletion
191 * of both object and semaphore if present.)
192 */
193 acpi_ut_remove_reference(obj_desc);
194 return_ACPI_STATUS(status);
195}
196
197/*******************************************************************************
198 *
199 * FUNCTION: acpi_ex_create_region
200 *
201 * PARAMETERS: aml_start - Pointer to the region declaration AML
202 * aml_length - Max length of the declaration AML
203 * space_id - Address space ID for the region
204 * walk_state - Current state
205 *
206 * RETURN: Status
207 *
208 * DESCRIPTION: Create a new operation region object
209 *
210 ******************************************************************************/
211
212acpi_status
213acpi_ex_create_region(u8 * aml_start,
214 u32 aml_length,
215 u8 space_id, struct acpi_walk_state *walk_state)
216{
217 acpi_status status;
218 union acpi_operand_object *obj_desc;
219 struct acpi_namespace_node *node;
220 union acpi_operand_object *region_obj2;
221
222 ACPI_FUNCTION_TRACE(ex_create_region);
223
224 /* Get the Namespace Node */
225
226 node = walk_state->op->common.node;
227
228 /*
229 * If the region object is already attached to this node,
230 * just return
231 */
232 if (acpi_ns_get_attached_object(node)) {
233 return_ACPI_STATUS(AE_OK);
234 }
235
236 /*
237 * Space ID must be one of the predefined IDs, or in the user-defined
238 * range
239 */
240 if (!acpi_is_valid_space_id(space_id)) {
241 /*
242 * Print an error message, but continue. We don't want to abort
243 * a table load for this exception. Instead, if the region is
244 * actually used at runtime, abort the executing method.
245 */
246 ACPI_ERROR((AE_INFO,
247 "Invalid/unknown Address Space ID: 0x%2.2X",
248 space_id));
249 }
250
251 ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
252 acpi_ut_get_region_name(space_id), space_id));
253
254 /* Create the region descriptor */
255
256 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
257 if (!obj_desc) {
258 status = AE_NO_MEMORY;
259 goto cleanup;
260 }
261
262 /*
263 * Remember location in AML stream of address & length
264 * operands since they need to be evaluated at run time.
265 */
266 region_obj2 = acpi_ns_get_secondary_object(obj_desc);
267 region_obj2->extra.aml_start = aml_start;
268 region_obj2->extra.aml_length = aml_length;
269 region_obj2->extra.method_REG = NULL;
270 if (walk_state->scope_info) {
271 region_obj2->extra.scope_node =
272 walk_state->scope_info->scope.node;
273 } else {
274 region_obj2->extra.scope_node = node;
275 }
276
277 /* Init the region from the operands */
278
279 obj_desc->region.space_id = space_id;
280 obj_desc->region.address = 0;
281 obj_desc->region.length = 0;
282 obj_desc->region.node = node;
283 obj_desc->region.handler = NULL;
284 obj_desc->common.flags &=
285 ~(AOPOBJ_SETUP_COMPLETE | AOPOBJ_REG_CONNECTED |
286 AOPOBJ_OBJECT_INITIALIZED);
287
288 /* Install the new region object in the parent Node */
289
290 status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);
291
292cleanup:
293
294 /* Remove local reference to the object */
295
296 acpi_ut_remove_reference(obj_desc);
297 return_ACPI_STATUS(status);
298}
299
300/*******************************************************************************
301 *
302 * FUNCTION: acpi_ex_create_processor
303 *
304 * PARAMETERS: walk_state - Current state
305 *
306 * RETURN: Status
307 *
308 * DESCRIPTION: Create a new processor object and populate the fields
309 *
310 * Processor (Name[0], cpu_ID[1], pblock_addr[2], pblock_length[3])
311 *
312 ******************************************************************************/
313
314acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state)
315{
316 union acpi_operand_object **operand = &walk_state->operands[0];
317 union acpi_operand_object *obj_desc;
318 acpi_status status;
319
320 ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state);
321
322 /* Create the processor object */
323
324 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR);
325 if (!obj_desc) {
326 return_ACPI_STATUS(AE_NO_MEMORY);
327 }
328
329 /* Initialize the processor object from the operands */
330
331 obj_desc->processor.proc_id = (u8) operand[1]->integer.value;
332 obj_desc->processor.length = (u8) operand[3]->integer.value;
333 obj_desc->processor.address =
334 (acpi_io_address)operand[2]->integer.value;
335
336 /* Install the processor object in the parent Node */
337
338 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
339 obj_desc, ACPI_TYPE_PROCESSOR);
340
341 /* Remove local reference to the object */
342
343 acpi_ut_remove_reference(obj_desc);
344 return_ACPI_STATUS(status);
345}
346
347/*******************************************************************************
348 *
349 * FUNCTION: acpi_ex_create_power_resource
350 *
351 * PARAMETERS: walk_state - Current state
352 *
353 * RETURN: Status
354 *
355 * DESCRIPTION: Create a new power_resource object and populate the fields
356 *
357 * power_resource (Name[0], system_level[1], resource_order[2])
358 *
359 ******************************************************************************/
360
361acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state)
362{
363 union acpi_operand_object **operand = &walk_state->operands[0];
364 acpi_status status;
365 union acpi_operand_object *obj_desc;
366
367 ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state);
368
369 /* Create the power resource object */
370
371 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER);
372 if (!obj_desc) {
373 return_ACPI_STATUS(AE_NO_MEMORY);
374 }
375
376 /* Initialize the power object from the operands */
377
378 obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
379 obj_desc->power_resource.resource_order =
380 (u16) operand[2]->integer.value;
381
382 /* Install the power resource object in the parent Node */
383
384 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
385 obj_desc, ACPI_TYPE_POWER);
386
387 /* Remove local reference to the object */
388
389 acpi_ut_remove_reference(obj_desc);
390 return_ACPI_STATUS(status);
391}
392
393/*******************************************************************************
394 *
395 * FUNCTION: acpi_ex_create_method
396 *
397 * PARAMETERS: aml_start - First byte of the method's AML
398 * aml_length - AML byte count for this method
399 * walk_state - Current state
400 *
401 * RETURN: Status
402 *
403 * DESCRIPTION: Create a new method object
404 *
405 ******************************************************************************/
406
407acpi_status
408acpi_ex_create_method(u8 * aml_start,
409 u32 aml_length, struct acpi_walk_state *walk_state)
410{
411 union acpi_operand_object **operand = &walk_state->operands[0];
412 union acpi_operand_object *obj_desc;
413 acpi_status status;
414 u8 method_flags;
415
416 ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state);
417
418 /* Create a new method object */
419
420 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
421 if (!obj_desc) {
422 status = AE_NO_MEMORY;
423 goto exit;
424 }
425
426 /* Save the method's AML pointer and length */
427
428 obj_desc->method.aml_start = aml_start;
429 obj_desc->method.aml_length = aml_length;
430 obj_desc->method.node = operand[0];
431
432 /*
433 * Disassemble the method flags. Split off the arg_count, Serialized
434 * flag, and sync_level for efficiency.
435 */
436 method_flags = (u8)operand[1]->integer.value;
437 obj_desc->method.param_count = (u8)
438 (method_flags & AML_METHOD_ARG_COUNT);
439
440 /*
441 * Get the sync_level. If method is serialized, a mutex will be
442 * created for this method when it is parsed.
443 */
444 if (method_flags & AML_METHOD_SERIALIZED) {
445 obj_desc->method.info_flags = ACPI_METHOD_SERIALIZED;
446
447 /*
448 * ACPI 1.0: sync_level = 0
449 * ACPI 2.0: sync_level = sync_level in method declaration
450 */
451 obj_desc->method.sync_level = (u8)
452 ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4);
453 }
454
455 /* Attach the new object to the method Node */
456
457 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
458 obj_desc, ACPI_TYPE_METHOD);
459
460 /* Remove local reference to the object */
461
462 acpi_ut_remove_reference(obj_desc);
463
464exit:
465 /* Remove a reference to the operand */
466
467 acpi_ut_remove_reference(operand[1]);
468 return_ACPI_STATUS(status);
469}