1
2 /******************************************************************************
3 *
4 * Module Name: exstoren - AML Interpreter object store support,
5 * Store to Node (namespace object)
6 *
7 *****************************************************************************/
8
9 /*
10 * Copyright (C) 2000 - 2008, Intel Corp.
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions, and the following disclaimer,
18 * without modification.
19 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
20 * substantially similar to the "NO WARRANTY" disclaimer below
21 * ("Disclaimer") and any redistribution must be conditioned upon
22 * including a substantially similar Disclaimer requirement for further
23 * binary redistribution.
24 * 3. Neither the names of the above-listed copyright holders nor the names
25 * of any contributors may be used to endorse or promote products derived
26 * from this software without specific prior written permission.
27 *
28 * Alternatively, this software may be distributed under the terms of the
29 * GNU General Public License ("GPL") version 2 as published by the Free
30 * Software Foundation.
31 *
32 * NO WARRANTY
33 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
34 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
35 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
36 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
37 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
42 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
43 * POSSIBILITY OF SUCH DAMAGES.
44 */
45
46 #include <acpi/acpi.h>
47 #include "accommon.h"
48 #include "acinterp.h"
49 #include "amlcode.h"
50
51 #define _COMPONENT ACPI_EXECUTER
52 ACPI_MODULE_NAME("exstoren")
53
54 /*******************************************************************************
55 *
56 * FUNCTION: acpi_ex_resolve_object
57 *
58 * PARAMETERS: source_desc_ptr - Pointer to the source object
59 * target_type - Current type of the target
60 * walk_state - Current walk state
61 *
62 * RETURN: Status, resolved object in source_desc_ptr.
63 *
64 * DESCRIPTION: Resolve an object. If the object is a reference, dereference
65 * it and return the actual object in the source_desc_ptr.
66 *
67 ******************************************************************************/
68 acpi_status
69 acpi_ex_resolve_object(union acpi_operand_object **source_desc_ptr,
70 acpi_object_type target_type,
71 struct acpi_walk_state *walk_state)
72 {
73 union acpi_operand_object *source_desc = *source_desc_ptr;
74 acpi_status status = AE_OK;
75
76 ACPI_FUNCTION_TRACE(ex_resolve_object);
77
78 /* Ensure we have a Target that can be stored to */
79
80 switch (target_type) {
81 case ACPI_TYPE_BUFFER_FIELD:
82 case ACPI_TYPE_LOCAL_REGION_FIELD:
83 case ACPI_TYPE_LOCAL_BANK_FIELD:
84 case ACPI_TYPE_LOCAL_INDEX_FIELD:
85 /*
86 * These cases all require only Integers or values that
87 * can be converted to Integers (Strings or Buffers)
88 */
89
90 case ACPI_TYPE_INTEGER:
91 case ACPI_TYPE_STRING:
92 case ACPI_TYPE_BUFFER:
93
94 /*
95 * Stores into a Field/Region or into a Integer/Buffer/String
96 * are all essentially the same. This case handles the
97 * "interchangeable" types Integer, String, and Buffer.
98 */
99 if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) {
100
101 /* Resolve a reference object first */
102
103 status =
104 acpi_ex_resolve_to_value(source_desc_ptr,
105 walk_state);
106 if (ACPI_FAILURE(status)) {
107 break;
108 }
109 }
110
111 /* For copy_object, no further validation necessary */
112
113 if (walk_state->opcode == AML_COPY_OP) {
114 break;
115 }
116
117 /* Must have a Integer, Buffer, or String */
118
119 if ((source_desc->common.type != ACPI_TYPE_INTEGER) &&
120 (source_desc->common.type != ACPI_TYPE_BUFFER) &&
121 (source_desc->common.type != ACPI_TYPE_STRING) &&
122 !((source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) &&
123 (source_desc->reference.class == ACPI_REFCLASS_TABLE))) {
124
125 /* Conversion successful but still not a valid type */
126
127 ACPI_ERROR((AE_INFO,
128 "Cannot assign type %s to %s (must be type Int/Str/Buf)",
129 acpi_ut_get_object_type_name(source_desc),
130 acpi_ut_get_type_name(target_type)));
131 status = AE_AML_OPERAND_TYPE;
132 }
133 break;
134
135 case ACPI_TYPE_LOCAL_ALIAS:
136 case ACPI_TYPE_LOCAL_METHOD_ALIAS:
137
138 /*
139 * All aliases should have been resolved earlier, during the
140 * operand resolution phase.
141 */
142 ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object"));
143 status = AE_AML_INTERNAL;
144 break;
145
146 case ACPI_TYPE_PACKAGE:
147 default:
148
149 /*
150 * All other types than Alias and the various Fields come here,
151 * including the untyped case - ACPI_TYPE_ANY.
152 */
153 break;
154 }
155
156 return_ACPI_STATUS(status);
157 }
158
159 /*******************************************************************************
160 *
161 * FUNCTION: acpi_ex_store_object_to_object
162 *
163 * PARAMETERS: source_desc - Object to store
164 * dest_desc - Object to receive a copy of the source
165 * new_desc - New object if dest_desc is obsoleted
166 * walk_state - Current walk state
167 *
168 * RETURN: Status
169 *
170 * DESCRIPTION: "Store" an object to another object. This may include
171 * converting the source type to the target type (implicit
172 * conversion), and a copy of the value of the source to
173 * the target.
174 *
175 * The Assignment of an object to another (not named) object
176 * is handled here.
177 * The Source passed in will replace the current value (if any)
178 * with the input value.
179 *
180 * When storing into an object the data is converted to the
181 * target object type then stored in the object. This means
182 * that the target object type (for an initialized target) will
183 * not be changed by a store operation.
184 *
185 * This module allows destination types of Number, String,
186 * Buffer, and Package.
187 *
188 * Assumes parameters are already validated. NOTE: source_desc
189 * resolution (from a reference object) must be performed by
190 * the caller if necessary.
191 *
192 ******************************************************************************/
193
194 acpi_status
195 acpi_ex_store_object_to_object(union acpi_operand_object *source_desc,
196 union acpi_operand_object *dest_desc,
197 union acpi_operand_object **new_desc,
198 struct acpi_walk_state *walk_state)
199 {
200 union acpi_operand_object *actual_src_desc;
201 acpi_status status = AE_OK;
202
203 ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc);
204
205 actual_src_desc = source_desc;
206 if (!dest_desc) {
207 /*
208 * There is no destination object (An uninitialized node or
209 * package element), so we can simply copy the source object
210 * creating a new destination object
211 */
212 status =
213 acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc,
214 walk_state);
215 return_ACPI_STATUS(status);
216 }
217
218 if (source_desc->common.type != dest_desc->common.type) {
219 /*
220 * The source type does not match the type of the destination.
221 * Perform the "implicit conversion" of the source to the current type
222 * of the target as per the ACPI specification.
223 *
224 * If no conversion performed, actual_src_desc = source_desc.
225 * Otherwise, actual_src_desc is a temporary object to hold the
226 * converted object.
227 */
228 status = acpi_ex_convert_to_target_type(dest_desc->common.type,
229 source_desc,
230 &actual_src_desc,
231 walk_state);
232 if (ACPI_FAILURE(status)) {
233 return_ACPI_STATUS(status);
234 }
235
236 if (source_desc == actual_src_desc) {
237 /*
238 * No conversion was performed. Return the source_desc as the
239 * new object.
240 */
241 *new_desc = source_desc;
242 return_ACPI_STATUS(AE_OK);
243 }
244 }
245
246 /*
247 * We now have two objects of identical types, and we can perform a
248 * copy of the *value* of the source object.
249 */
250 switch (dest_desc->common.type) {
251 case ACPI_TYPE_INTEGER:
252
253 dest_desc->integer.value = actual_src_desc->integer.value;
254
255 /* Truncate value if we are executing from a 32-bit ACPI table */
256
257 acpi_ex_truncate_for32bit_table(dest_desc);
258 break;
259
260 case ACPI_TYPE_STRING:
261
262 status =
263 acpi_ex_store_string_to_string(actual_src_desc, dest_desc);
264 break;
265
266 case ACPI_TYPE_BUFFER:
267
268 status =
269 acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc);
270 break;
271
272 case ACPI_TYPE_PACKAGE:
273
274 status =
275 acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc,
276 walk_state);
277 break;
278
279 default:
280 /*
281 * All other types come here.
282 */
283 ACPI_WARNING((AE_INFO, "Store into type %s not implemented",
284 acpi_ut_get_object_type_name(dest_desc)));
285
286 status = AE_NOT_IMPLEMENTED;
287 break;
288 }
289
290 if (actual_src_desc != source_desc) {
291
292 /* Delete the intermediate (temporary) source object */
293
294 acpi_ut_remove_reference(actual_src_desc);
295 }
296
297 *new_desc = dest_desc;
298 return_ACPI_STATUS(status);
299 }
300
|
This page was automatically generated by the
LXR engine.
|