blob: 3c61b48c73f5512341a875fe023fe6df4698850d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: excreate - Named object creation
4 *
5 *****************************************************************************/
6
7/*
Bob Moorea8357b02010-01-22 19:07:36 +08008 * Copyright (C) 2000 - 2010, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acinterp.h"
47#include "amlcode.h"
48#include "acnamesp.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#define _COMPONENT ACPI_EXECUTER
Len Brown4be44fc2005-08-05 00:44:28 -040051ACPI_MODULE_NAME("excreate")
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#ifndef ACPI_NO_METHOD_EXECUTION
Robert Moore44f6c012005-04-18 22:49:35 -040053/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 *
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 *
Robert Moore44f6c012005-04-18 22:49:35 -040063 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -040064acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
Len Brown4be44fc2005-08-05 00:44:28 -040066 struct acpi_namespace_node *target_node;
67 struct acpi_namespace_node *alias_node;
68 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Bob Mooreb229cf92006-04-21 17:15:00 -040070 ACPI_FUNCTION_TRACE(ex_create_alias);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
72 /* Get the source/alias operands (both namespace nodes) */
73
Len Brown4be44fc2005-08-05 00:44:28 -040074 alias_node = (struct acpi_namespace_node *)walk_state->operands[0];
75 target_node = (struct acpi_namespace_node *)walk_state->operands[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77 if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
Len Brown4be44fc2005-08-05 00:44:28 -040078 (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 /*
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 */
Len Brown4be44fc2005-08-05 00:44:28 -040085 target_node =
86 ACPI_CAST_PTR(struct acpi_namespace_node,
87 target_node->object);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 }
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) {
Bob Moore53cf1742008-04-10 19:06:39 +040098
99 /* For these types, the sub-object can change dynamically via a Store */
100
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 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 /*
Bob Moore53cf1742008-04-10 19:06:39 +0400108 * 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 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 * The new alias has the type ALIAS and points to the original
Bob Moore53cf1742008-04-10 19:06:39 +0400119 * NS node, not the object itself.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 */
121 alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
Len Brown4be44fc2005-08-05 00:44:28 -0400122 alias_node->object =
123 ACPI_CAST_PTR(union acpi_operand_object, target_node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 break;
125
126 case ACPI_TYPE_METHOD:
127
128 /*
Bob Moore53cf1742008-04-10 19:06:39 +0400129 * Control method aliases need to be differentiated
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 */
131 alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
Len Brown4be44fc2005-08-05 00:44:28 -0400132 alias_node->object =
133 ACPI_CAST_PTR(union acpi_operand_object, target_node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400146 status = acpi_ns_attach_object(alias_node,
147 acpi_ns_get_attached_object
148 (target_node),
149 target_node->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 break;
151 }
152
153 /* Since both operands are Nodes, we don't need to delete them */
154
Len Brown4be44fc2005-08-05 00:44:28 -0400155 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156}
157
Robert Moore44f6c012005-04-18 22:49:35 -0400158/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 *
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 *
Robert Moore44f6c012005-04-18 22:49:35 -0400168 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Len Brown4be44fc2005-08-05 00:44:28 -0400170acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171{
Len Brown4be44fc2005-08-05 00:44:28 -0400172 acpi_status status;
173 union acpi_operand_object *obj_desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Bob Mooreb229cf92006-04-21 17:15:00 -0400175 ACPI_FUNCTION_TRACE(ex_create_event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Len Brown4be44fc2005-08-05 00:44:28 -0400177 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400187 status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,
Bob Moore967440e32006-06-23 17:04:00 -0400188 &obj_desc->event.os_semaphore);
Len Brown4be44fc2005-08-05 00:44:28 -0400189 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 goto cleanup;
191 }
192
193 /* Attach object to the Node */
194
Len Brown4be44fc2005-08-05 00:44:28 -0400195 status =
196 acpi_ns_attach_object((struct acpi_namespace_node *)walk_state->
197 operands[0], obj_desc, ACPI_TYPE_EVENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Len Brown4be44fc2005-08-05 00:44:28 -0400199 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 /*
201 * Remove local reference to the object (on error, will cause deletion
202 * of both object and semaphore if present.)
203 */
Len Brown4be44fc2005-08-05 00:44:28 -0400204 acpi_ut_remove_reference(obj_desc);
205 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206}
207
Robert Moore44f6c012005-04-18 22:49:35 -0400208/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 *
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 *
Robert Moore44f6c012005-04-18 22:49:35 -0400220 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
Len Brown4be44fc2005-08-05 00:44:28 -0400222acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223{
Len Brown4be44fc2005-08-05 00:44:28 -0400224 acpi_status status = AE_OK;
225 union acpi_operand_object *obj_desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Bob Mooreb229cf92006-04-21 17:15:00 -0400227 ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
229 /* Create the new mutex object */
230
Len Brown4be44fc2005-08-05 00:44:28 -0400231 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 if (!obj_desc) {
233 status = AE_NO_MEMORY;
234 goto cleanup;
235 }
236
Bob Moore967440e32006-06-23 17:04:00 -0400237 /* Create the actual OS Mutex */
238
239 status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex);
Len Brown4be44fc2005-08-05 00:44:28 -0400240 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 goto cleanup;
242 }
243
244 /* Init object and attach to NS node */
245
Len Brown4be44fc2005-08-05 00:44:28 -0400246 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];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Bob Moore616861242006-03-17 16:44:00 -0500251 status =
252 acpi_ns_attach_object(obj_desc->mutex.node, obj_desc,
253 ACPI_TYPE_MUTEX);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
Len Brown4be44fc2005-08-05 00:44:28 -0400255 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 /*
257 * Remove local reference to the object (on error, will cause deletion
258 * of both object and semaphore if present.)
259 */
Len Brown4be44fc2005-08-05 00:44:28 -0400260 acpi_ut_remove_reference(obj_desc);
261 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262}
263
Robert Moore44f6c012005-04-18 22:49:35 -0400264/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 *
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
Robert Moore44f6c012005-04-18 22:49:35 -0400270 * region_space - space_iD for the region
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 * walk_state - Current state
272 *
273 * RETURN: Status
274 *
275 * DESCRIPTION: Create a new operation region object
276 *
Robert Moore44f6c012005-04-18 22:49:35 -0400277 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
279acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400280acpi_ex_create_region(u8 * aml_start,
281 u32 aml_length,
282 u8 region_space, struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
Len Brown4be44fc2005-08-05 00:44:28 -0400284 acpi_status status;
285 union acpi_operand_object *obj_desc;
286 struct acpi_namespace_node *node;
287 union acpi_operand_object *region_obj2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Bob Mooreb229cf92006-04-21 17:15:00 -0400289 ACPI_FUNCTION_TRACE(ex_create_region);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400299 if (acpi_ns_get_attached_object(node)) {
300 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 }
302
303 /*
304 * Space ID must be one of the predefined IDs, or in the user-defined
305 * range
306 */
307 if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) &&
Len Brown4be44fc2005-08-05 00:44:28 -0400308 (region_space < ACPI_USER_REGION_BEGIN)) {
Bob Mooref6a22b02010-03-05 17:56:40 +0800309 ACPI_ERROR((AE_INFO, "Invalid AddressSpace type 0x%X",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500310 region_space));
Len Brown4be44fc2005-08-05 00:44:28 -0400311 return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 }
313
Bob Mooref6a22b02010-03-05 17:56:40 +0800314 ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400315 acpi_ut_get_region_name(region_space), region_space));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317 /* Create the region descriptor */
318
Len Brown4be44fc2005-08-05 00:44:28 -0400319 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 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 */
Len Brown4be44fc2005-08-05 00:44:28 -0400329 region_obj2 = obj_desc->common.next_object;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 region_obj2->extra.aml_start = aml_start;
331 region_obj2->extra.aml_length = aml_length;
332
333 /* Init the region from the operands */
334
335 obj_desc->region.space_id = region_space;
336 obj_desc->region.address = 0;
337 obj_desc->region.length = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400338 obj_desc->region.node = node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 /* Install the new region object in the parent Node */
341
Len Brown4be44fc2005-08-05 00:44:28 -0400342 status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Len Brown4be44fc2005-08-05 00:44:28 -0400344 cleanup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
346 /* Remove local reference to the object */
347
Len Brown4be44fc2005-08-05 00:44:28 -0400348 acpi_ut_remove_reference(obj_desc);
349 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350}
351
Robert Moore44f6c012005-04-18 22:49:35 -0400352/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 * FUNCTION: acpi_ex_create_processor
355 *
356 * PARAMETERS: walk_state - Current state
357 *
358 * RETURN: Status
359 *
360 * DESCRIPTION: Create a new processor object and populate the fields
361 *
362 * Processor (Name[0], cpu_iD[1], pblock_addr[2], pblock_length[3])
363 *
Robert Moore44f6c012005-04-18 22:49:35 -0400364 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
Len Brown4be44fc2005-08-05 00:44:28 -0400366acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367{
Len Brown4be44fc2005-08-05 00:44:28 -0400368 union acpi_operand_object **operand = &walk_state->operands[0];
369 union acpi_operand_object *obj_desc;
370 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Bob Mooreb229cf92006-04-21 17:15:00 -0400372 ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
374 /* Create the processor object */
375
Len Brown4be44fc2005-08-05 00:44:28 -0400376 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 if (!obj_desc) {
Len Brown4be44fc2005-08-05 00:44:28 -0400378 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 }
380
Robert Moore44f6c012005-04-18 22:49:35 -0400381 /* Initialize the processor object from the operands */
382
Len Brown4be44fc2005-08-05 00:44:28 -0400383 obj_desc->processor.proc_id = (u8) operand[1]->integer.value;
Bob Moore616861242006-03-17 16:44:00 -0500384 obj_desc->processor.length = (u8) operand[3]->integer.value;
Len Brown4be44fc2005-08-05 00:44:28 -0400385 obj_desc->processor.address =
386 (acpi_io_address) operand[2]->integer.value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
388 /* Install the processor object in the parent Node */
389
Len Brown4be44fc2005-08-05 00:44:28 -0400390 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
391 obj_desc, ACPI_TYPE_PROCESSOR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
393 /* Remove local reference to the object */
394
Len Brown4be44fc2005-08-05 00:44:28 -0400395 acpi_ut_remove_reference(obj_desc);
396 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397}
398
Robert Moore44f6c012005-04-18 22:49:35 -0400399/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 *
401 * FUNCTION: acpi_ex_create_power_resource
402 *
403 * PARAMETERS: walk_state - Current state
404 *
405 * RETURN: Status
406 *
407 * DESCRIPTION: Create a new power_resource object and populate the fields
408 *
409 * power_resource (Name[0], system_level[1], resource_order[2])
410 *
Robert Moore44f6c012005-04-18 22:49:35 -0400411 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
Len Brown4be44fc2005-08-05 00:44:28 -0400413acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414{
Len Brown4be44fc2005-08-05 00:44:28 -0400415 union acpi_operand_object **operand = &walk_state->operands[0];
416 acpi_status status;
417 union acpi_operand_object *obj_desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Bob Mooreb229cf92006-04-21 17:15:00 -0400419 ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
421 /* Create the power resource object */
422
Len Brown4be44fc2005-08-05 00:44:28 -0400423 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 if (!obj_desc) {
Len Brown4be44fc2005-08-05 00:44:28 -0400425 return_ACPI_STATUS(AE_NO_MEMORY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 }
427
428 /* Initialize the power object from the operands */
429
430 obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;
Len Brown4be44fc2005-08-05 00:44:28 -0400431 obj_desc->power_resource.resource_order =
432 (u16) operand[2]->integer.value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
434 /* Install the power resource object in the parent Node */
435
Len Brown4be44fc2005-08-05 00:44:28 -0400436 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
437 obj_desc, ACPI_TYPE_POWER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439 /* Remove local reference to the object */
440
Len Brown4be44fc2005-08-05 00:44:28 -0400441 acpi_ut_remove_reference(obj_desc);
442 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444#endif
445
Robert Moore44f6c012005-04-18 22:49:35 -0400446/*******************************************************************************
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 *
448 * FUNCTION: acpi_ex_create_method
449 *
450 * PARAMETERS: aml_start - First byte of the method's AML
451 * aml_length - AML byte count for this method
452 * walk_state - Current state
453 *
454 * RETURN: Status
455 *
456 * DESCRIPTION: Create a new method object
457 *
Robert Moore44f6c012005-04-18 22:49:35 -0400458 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
460acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400461acpi_ex_create_method(u8 * aml_start,
462 u32 aml_length, struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463{
Len Brown4be44fc2005-08-05 00:44:28 -0400464 union acpi_operand_object **operand = &walk_state->operands[0];
465 union acpi_operand_object *obj_desc;
466 acpi_status status;
467 u8 method_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
Bob Mooreb229cf92006-04-21 17:15:00 -0400469 ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
471 /* Create a new method object */
472
Len Brown4be44fc2005-08-05 00:44:28 -0400473 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 if (!obj_desc) {
Bob Mooref3d2e782007-02-02 19:48:18 +0300475 status = AE_NO_MEMORY;
476 goto exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 }
478
479 /* Save the method's AML pointer and length */
480
481 obj_desc->method.aml_start = aml_start;
482 obj_desc->method.aml_length = aml_length;
483
484 /*
Bob Moore967440e32006-06-23 17:04:00 -0400485 * Disassemble the method flags. Split off the Arg Count
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 * for efficiency
487 */
488 method_flags = (u8) operand[1]->integer.value;
489
Len Brown4be44fc2005-08-05 00:44:28 -0400490 obj_desc->method.method_flags =
491 (u8) (method_flags & ~AML_METHOD_ARG_COUNT);
492 obj_desc->method.param_count =
493 (u8) (method_flags & AML_METHOD_ARG_COUNT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
495 /*
Bob Moore967440e32006-06-23 17:04:00 -0400496 * Get the sync_level. If method is serialized, a mutex will be
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 * created for this method when it is parsed.
498 */
Len Brown4d2acd92007-05-09 22:56:38 -0400499 if (method_flags & AML_METHOD_SERIALIZED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 /*
Bob Moore967440e32006-06-23 17:04:00 -0400501 * ACPI 1.0: sync_level = 0
502 * ACPI 2.0: sync_level = sync_level in method declaration
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 */
Bob Moore967440e32006-06-23 17:04:00 -0400504 obj_desc->method.sync_level = (u8)
Lin Mingb2f7ddc2009-05-21 10:42:09 +0800505 ((method_flags & AML_METHOD_SYNC_LEVEL) >> 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 }
507
508 /* Attach the new object to the method Node */
509
Len Brown4be44fc2005-08-05 00:44:28 -0400510 status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],
511 obj_desc, ACPI_TYPE_METHOD);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
513 /* Remove local reference to the object */
514
Len Brown4be44fc2005-08-05 00:44:28 -0400515 acpi_ut_remove_reference(obj_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
Bob Mooref3d2e782007-02-02 19:48:18 +0300517 exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 /* Remove a reference to the operand */
519
Len Brown4be44fc2005-08-05 00:44:28 -0400520 acpi_ut_remove_reference(operand[1]);
521 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522}