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1
2/******************************************************************************
3 *
4 * Module Name: exresnte - AML Interpreter object resolution
5 *
6 *****************************************************************************/
7
8/*
9 * Copyright (C) 2000 - 2012, Intel Corp.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45#include <acpi/acpi.h>
46#include "accommon.h"
47#include "acdispat.h"
48#include "acinterp.h"
49#include "acnamesp.h"
50
51#define _COMPONENT ACPI_EXECUTER
52ACPI_MODULE_NAME("exresnte")
53
54/*******************************************************************************
55 *
56 * FUNCTION: acpi_ex_resolve_node_to_value
57 *
58 * PARAMETERS: object_ptr - Pointer to a location that contains
59 * a pointer to a NS node, and will receive a
60 * pointer to the resolved object.
61 * walk_state - Current state. Valid only if executing AML
62 * code. NULL if simply resolving an object
63 *
64 * RETURN: Status
65 *
66 * DESCRIPTION: Resolve a Namespace node to a valued object
67 *
68 * Note: for some of the data types, the pointer attached to the Node
69 * can be either a pointer to an actual internal object or a pointer into the
70 * AML stream itself. These types are currently:
71 *
72 * ACPI_TYPE_INTEGER
73 * ACPI_TYPE_STRING
74 * ACPI_TYPE_BUFFER
75 * ACPI_TYPE_MUTEX
76 * ACPI_TYPE_PACKAGE
77 *
78 ******************************************************************************/
79acpi_status
80acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr,
81 struct acpi_walk_state *walk_state)
82{
83 acpi_status status = AE_OK;
84 union acpi_operand_object *source_desc;
85 union acpi_operand_object *obj_desc = NULL;
86 struct acpi_namespace_node *node;
87 acpi_object_type entry_type;
88
89 ACPI_FUNCTION_TRACE(ex_resolve_node_to_value);
90
91 /*
92 * The stack pointer points to a struct acpi_namespace_node (Node). Get the
93 * object that is attached to the Node.
94 */
95 node = *object_ptr;
96 source_desc = acpi_ns_get_attached_object(node);
97 entry_type = acpi_ns_get_type((acpi_handle) node);
98
99 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n",
100 node, source_desc,
101 acpi_ut_get_type_name(entry_type)));
102
103 if ((entry_type == ACPI_TYPE_LOCAL_ALIAS) ||
104 (entry_type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
105
106 /* There is always exactly one level of indirection */
107
108 node = ACPI_CAST_PTR(struct acpi_namespace_node, node->object);
109 source_desc = acpi_ns_get_attached_object(node);
110 entry_type = acpi_ns_get_type((acpi_handle) node);
111 *object_ptr = node;
112 }
113
114 /*
115 * Several object types require no further processing:
116 * 1) Device/Thermal objects don't have a "real" subobject, return the Node
117 * 2) Method locals and arguments have a pseudo-Node
118 * 3) 10/2007: Added method type to assist with Package construction.
119 */
120 if ((entry_type == ACPI_TYPE_DEVICE) ||
121 (entry_type == ACPI_TYPE_THERMAL) ||
122 (entry_type == ACPI_TYPE_METHOD) ||
123 (node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) {
124 return_ACPI_STATUS(AE_OK);
125 }
126
127 if (!source_desc) {
128 ACPI_ERROR((AE_INFO, "No object attached to node %p", node));
129 return_ACPI_STATUS(AE_AML_NO_OPERAND);
130 }
131
132 /*
133 * Action is based on the type of the Node, which indicates the type
134 * of the attached object or pointer
135 */
136 switch (entry_type) {
137 case ACPI_TYPE_PACKAGE:
138
139 if (source_desc->common.type != ACPI_TYPE_PACKAGE) {
140 ACPI_ERROR((AE_INFO, "Object not a Package, type %s",
141 acpi_ut_get_object_type_name(source_desc)));
142 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
143 }
144
145 status = acpi_ds_get_package_arguments(source_desc);
146 if (ACPI_SUCCESS(status)) {
147
148 /* Return an additional reference to the object */
149
150 obj_desc = source_desc;
151 acpi_ut_add_reference(obj_desc);
152 }
153 break;
154
155 case ACPI_TYPE_BUFFER:
156
157 if (source_desc->common.type != ACPI_TYPE_BUFFER) {
158 ACPI_ERROR((AE_INFO, "Object not a Buffer, type %s",
159 acpi_ut_get_object_type_name(source_desc)));
160 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
161 }
162
163 status = acpi_ds_get_buffer_arguments(source_desc);
164 if (ACPI_SUCCESS(status)) {
165
166 /* Return an additional reference to the object */
167
168 obj_desc = source_desc;
169 acpi_ut_add_reference(obj_desc);
170 }
171 break;
172
173 case ACPI_TYPE_STRING:
174
175 if (source_desc->common.type != ACPI_TYPE_STRING) {
176 ACPI_ERROR((AE_INFO, "Object not a String, type %s",
177 acpi_ut_get_object_type_name(source_desc)));
178 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
179 }
180
181 /* Return an additional reference to the object */
182
183 obj_desc = source_desc;
184 acpi_ut_add_reference(obj_desc);
185 break;
186
187 case ACPI_TYPE_INTEGER:
188
189 if (source_desc->common.type != ACPI_TYPE_INTEGER) {
190 ACPI_ERROR((AE_INFO, "Object not a Integer, type %s",
191 acpi_ut_get_object_type_name(source_desc)));
192 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
193 }
194
195 /* Return an additional reference to the object */
196
197 obj_desc = source_desc;
198 acpi_ut_add_reference(obj_desc);
199 break;
200
201 case ACPI_TYPE_BUFFER_FIELD:
202 case ACPI_TYPE_LOCAL_REGION_FIELD:
203 case ACPI_TYPE_LOCAL_BANK_FIELD:
204 case ACPI_TYPE_LOCAL_INDEX_FIELD:
205
206 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
207 "FieldRead Node=%p SourceDesc=%p Type=%X\n",
208 node, source_desc, entry_type));
209
210 status =
211 acpi_ex_read_data_from_field(walk_state, source_desc,
212 &obj_desc);
213 break;
214
215 /* For these objects, just return the object attached to the Node */
216
217 case ACPI_TYPE_MUTEX:
218 case ACPI_TYPE_POWER:
219 case ACPI_TYPE_PROCESSOR:
220 case ACPI_TYPE_EVENT:
221 case ACPI_TYPE_REGION:
222
223 /* Return an additional reference to the object */
224
225 obj_desc = source_desc;
226 acpi_ut_add_reference(obj_desc);
227 break;
228
229 /* TYPE_ANY is untyped, and thus there is no object associated with it */
230
231 case ACPI_TYPE_ANY:
232
233 ACPI_ERROR((AE_INFO,
234 "Untyped entry %p, no attached object!", node));
235
236 return_ACPI_STATUS(AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
237
238 case ACPI_TYPE_LOCAL_REFERENCE:
239
240 switch (source_desc->reference.class) {
241 case ACPI_REFCLASS_TABLE: /* This is a ddb_handle */
242 case ACPI_REFCLASS_REFOF:
243 case ACPI_REFCLASS_INDEX:
244
245 /* Return an additional reference to the object */
246
247 obj_desc = source_desc;
248 acpi_ut_add_reference(obj_desc);
249 break;
250
251 default:
252 /* No named references are allowed here */
253
254 ACPI_ERROR((AE_INFO,
255 "Unsupported Reference type 0x%X",
256 source_desc->reference.class));
257
258 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
259 }
260 break;
261
262 default:
263
264 /* Default case is for unknown types */
265
266 ACPI_ERROR((AE_INFO,
267 "Node %p - Unknown object type 0x%X",
268 node, entry_type));
269
270 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
271
272 } /* switch (entry_type) */
273
274 /* Return the object descriptor */
275
276 *object_ptr = (void *)obj_desc;
277 return_ACPI_STATUS(status);
278}
1/******************************************************************************
2 *
3 * Module Name: exresnte - AML Interpreter object resolution
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2014, 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 "acdispat.h"
47#include "acinterp.h"
48#include "acnamesp.h"
49
50#define _COMPONENT ACPI_EXECUTER
51ACPI_MODULE_NAME("exresnte")
52
53/*******************************************************************************
54 *
55 * FUNCTION: acpi_ex_resolve_node_to_value
56 *
57 * PARAMETERS: object_ptr - Pointer to a location that contains
58 * a pointer to a NS node, and will receive a
59 * pointer to the resolved object.
60 * walk_state - Current state. Valid only if executing AML
61 * code. NULL if simply resolving an object
62 *
63 * RETURN: Status
64 *
65 * DESCRIPTION: Resolve a Namespace node to a valued object
66 *
67 * Note: for some of the data types, the pointer attached to the Node
68 * can be either a pointer to an actual internal object or a pointer into the
69 * AML stream itself. These types are currently:
70 *
71 * ACPI_TYPE_INTEGER
72 * ACPI_TYPE_STRING
73 * ACPI_TYPE_BUFFER
74 * ACPI_TYPE_MUTEX
75 * ACPI_TYPE_PACKAGE
76 *
77 ******************************************************************************/
78acpi_status
79acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr,
80 struct acpi_walk_state *walk_state)
81{
82 acpi_status status = AE_OK;
83 union acpi_operand_object *source_desc;
84 union acpi_operand_object *obj_desc = NULL;
85 struct acpi_namespace_node *node;
86 acpi_object_type entry_type;
87
88 ACPI_FUNCTION_TRACE(ex_resolve_node_to_value);
89
90 /*
91 * The stack pointer points to a struct acpi_namespace_node (Node). Get the
92 * object that is attached to the Node.
93 */
94 node = *object_ptr;
95 source_desc = acpi_ns_get_attached_object(node);
96 entry_type = acpi_ns_get_type((acpi_handle) node);
97
98 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n",
99 node, source_desc,
100 acpi_ut_get_type_name(entry_type)));
101
102 if ((entry_type == ACPI_TYPE_LOCAL_ALIAS) ||
103 (entry_type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
104
105 /* There is always exactly one level of indirection */
106
107 node = ACPI_CAST_PTR(struct acpi_namespace_node, node->object);
108 source_desc = acpi_ns_get_attached_object(node);
109 entry_type = acpi_ns_get_type((acpi_handle) node);
110 *object_ptr = node;
111 }
112
113 /*
114 * Several object types require no further processing:
115 * 1) Device/Thermal objects don't have a "real" subobject, return the Node
116 * 2) Method locals and arguments have a pseudo-Node
117 * 3) 10/2007: Added method type to assist with Package construction.
118 */
119 if ((entry_type == ACPI_TYPE_DEVICE) ||
120 (entry_type == ACPI_TYPE_THERMAL) ||
121 (entry_type == ACPI_TYPE_METHOD) ||
122 (node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) {
123 return_ACPI_STATUS(AE_OK);
124 }
125
126 if (!source_desc) {
127 ACPI_ERROR((AE_INFO, "No object attached to node [%4.4s] %p",
128 node->name.ascii, node));
129 return_ACPI_STATUS(AE_AML_NO_OPERAND);
130 }
131
132 /*
133 * Action is based on the type of the Node, which indicates the type
134 * of the attached object or pointer
135 */
136 switch (entry_type) {
137 case ACPI_TYPE_PACKAGE:
138
139 if (source_desc->common.type != ACPI_TYPE_PACKAGE) {
140 ACPI_ERROR((AE_INFO, "Object not a Package, type %s",
141 acpi_ut_get_object_type_name(source_desc)));
142 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
143 }
144
145 status = acpi_ds_get_package_arguments(source_desc);
146 if (ACPI_SUCCESS(status)) {
147
148 /* Return an additional reference to the object */
149
150 obj_desc = source_desc;
151 acpi_ut_add_reference(obj_desc);
152 }
153 break;
154
155 case ACPI_TYPE_BUFFER:
156
157 if (source_desc->common.type != ACPI_TYPE_BUFFER) {
158 ACPI_ERROR((AE_INFO, "Object not a Buffer, type %s",
159 acpi_ut_get_object_type_name(source_desc)));
160 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
161 }
162
163 status = acpi_ds_get_buffer_arguments(source_desc);
164 if (ACPI_SUCCESS(status)) {
165
166 /* Return an additional reference to the object */
167
168 obj_desc = source_desc;
169 acpi_ut_add_reference(obj_desc);
170 }
171 break;
172
173 case ACPI_TYPE_STRING:
174
175 if (source_desc->common.type != ACPI_TYPE_STRING) {
176 ACPI_ERROR((AE_INFO, "Object not a String, type %s",
177 acpi_ut_get_object_type_name(source_desc)));
178 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
179 }
180
181 /* Return an additional reference to the object */
182
183 obj_desc = source_desc;
184 acpi_ut_add_reference(obj_desc);
185 break;
186
187 case ACPI_TYPE_INTEGER:
188
189 if (source_desc->common.type != ACPI_TYPE_INTEGER) {
190 ACPI_ERROR((AE_INFO, "Object not a Integer, type %s",
191 acpi_ut_get_object_type_name(source_desc)));
192 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
193 }
194
195 /* Return an additional reference to the object */
196
197 obj_desc = source_desc;
198 acpi_ut_add_reference(obj_desc);
199 break;
200
201 case ACPI_TYPE_BUFFER_FIELD:
202 case ACPI_TYPE_LOCAL_REGION_FIELD:
203 case ACPI_TYPE_LOCAL_BANK_FIELD:
204 case ACPI_TYPE_LOCAL_INDEX_FIELD:
205
206 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
207 "FieldRead Node=%p SourceDesc=%p Type=%X\n",
208 node, source_desc, entry_type));
209
210 status =
211 acpi_ex_read_data_from_field(walk_state, source_desc,
212 &obj_desc);
213 break;
214
215 /* For these objects, just return the object attached to the Node */
216
217 case ACPI_TYPE_MUTEX:
218 case ACPI_TYPE_POWER:
219 case ACPI_TYPE_PROCESSOR:
220 case ACPI_TYPE_EVENT:
221 case ACPI_TYPE_REGION:
222
223 /* Return an additional reference to the object */
224
225 obj_desc = source_desc;
226 acpi_ut_add_reference(obj_desc);
227 break;
228
229 /* TYPE_ANY is untyped, and thus there is no object associated with it */
230
231 case ACPI_TYPE_ANY:
232
233 ACPI_ERROR((AE_INFO,
234 "Untyped entry %p, no attached object!", node));
235
236 return_ACPI_STATUS(AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
237
238 case ACPI_TYPE_LOCAL_REFERENCE:
239
240 switch (source_desc->reference.class) {
241 case ACPI_REFCLASS_TABLE: /* This is a ddb_handle */
242 case ACPI_REFCLASS_REFOF:
243 case ACPI_REFCLASS_INDEX:
244
245 /* Return an additional reference to the object */
246
247 obj_desc = source_desc;
248 acpi_ut_add_reference(obj_desc);
249 break;
250
251 default:
252
253 /* No named references are allowed here */
254
255 ACPI_ERROR((AE_INFO,
256 "Unsupported Reference type 0x%X",
257 source_desc->reference.class));
258
259 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
260 }
261 break;
262
263 default:
264
265 /* Default case is for unknown types */
266
267 ACPI_ERROR((AE_INFO,
268 "Node %p - Unknown object type 0x%X",
269 node, entry_type));
270
271 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
272
273 } /* switch (entry_type) */
274
275 /* Return the object descriptor */
276
277 *object_ptr = (void *)obj_desc;
278 return_ACPI_STATUS(status);
279}