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1da177e4 LT |
1 | |
2 | /****************************************************************************** | |
3 | * | |
4 | * Module Name: exstoren - AML Interpreter object store support, | |
5 | * Store to Node (namespace object) | |
6 | * | |
7 | *****************************************************************************/ | |
8 | ||
9 | /* | |
6c9deb72 | 10 | * Copyright (C) 2000 - 2007, R. Byron Moore |
1da177e4 LT |
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 | ||
1da177e4 LT |
46 | #include <acpi/acpi.h> |
47 | #include <acpi/acinterp.h> | |
48 | #include <acpi/amlcode.h> | |
49 | ||
1da177e4 | 50 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 51 | ACPI_MODULE_NAME("exstoren") |
1da177e4 LT |
52 | |
53 | /******************************************************************************* | |
54 | * | |
55 | * FUNCTION: acpi_ex_resolve_object | |
56 | * | |
57 | * PARAMETERS: source_desc_ptr - Pointer to the source object | |
58 | * target_type - Current type of the target | |
59 | * walk_state - Current walk state | |
60 | * | |
61 | * RETURN: Status, resolved object in source_desc_ptr. | |
62 | * | |
63 | * DESCRIPTION: Resolve an object. If the object is a reference, dereference | |
64 | * it and return the actual object in the source_desc_ptr. | |
65 | * | |
66 | ******************************************************************************/ | |
1da177e4 | 67 | acpi_status |
4be44fcd LB |
68 | acpi_ex_resolve_object(union acpi_operand_object **source_desc_ptr, |
69 | acpi_object_type target_type, | |
70 | struct acpi_walk_state *walk_state) | |
1da177e4 | 71 | { |
4be44fcd LB |
72 | union acpi_operand_object *source_desc = *source_desc_ptr; |
73 | acpi_status status = AE_OK; | |
1da177e4 | 74 | |
b229cf92 | 75 | ACPI_FUNCTION_TRACE(ex_resolve_object); |
1da177e4 | 76 | |
44f6c012 RM |
77 | /* Ensure we have a Target that can be stored to */ |
78 | ||
1da177e4 LT |
79 | switch (target_type) { |
80 | case ACPI_TYPE_BUFFER_FIELD: | |
81 | case ACPI_TYPE_LOCAL_REGION_FIELD: | |
82 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
83 | case ACPI_TYPE_LOCAL_INDEX_FIELD: | |
84 | /* | |
85 | * These cases all require only Integers or values that | |
86 | * can be converted to Integers (Strings or Buffers) | |
87 | */ | |
88 | ||
89 | case ACPI_TYPE_INTEGER: | |
90 | case ACPI_TYPE_STRING: | |
91 | case ACPI_TYPE_BUFFER: | |
92 | ||
93 | /* | |
94 | * Stores into a Field/Region or into a Integer/Buffer/String | |
95 | * are all essentially the same. This case handles the | |
96 | * "interchangeable" types Integer, String, and Buffer. | |
97 | */ | |
4be44fcd LB |
98 | if (ACPI_GET_OBJECT_TYPE(source_desc) == |
99 | ACPI_TYPE_LOCAL_REFERENCE) { | |
52fc0b02 | 100 | |
1da177e4 LT |
101 | /* Resolve a reference object first */ |
102 | ||
4be44fcd LB |
103 | status = |
104 | acpi_ex_resolve_to_value(source_desc_ptr, | |
105 | walk_state); | |
106 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
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 | ||
44f6c012 RM |
117 | /* Must have a Integer, Buffer, or String */ |
118 | ||
4be44fcd LB |
119 | if ((ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_INTEGER) && |
120 | (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_BUFFER) && | |
121 | (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_STRING) && | |
122 | !((ACPI_GET_OBJECT_TYPE(source_desc) == | |
123 | ACPI_TYPE_LOCAL_REFERENCE) | |
124 | && (source_desc->reference.opcode == AML_LOAD_OP))) { | |
52fc0b02 | 125 | |
44f6c012 RM |
126 | /* Conversion successful but still not a valid type */ |
127 | ||
b8e4d893 BM |
128 | ACPI_ERROR((AE_INFO, |
129 | "Cannot assign type %s to %s (must be type Int/Str/Buf)", | |
130 | acpi_ut_get_object_type_name(source_desc), | |
131 | acpi_ut_get_type_name(target_type))); | |
1da177e4 LT |
132 | status = AE_AML_OPERAND_TYPE; |
133 | } | |
134 | break; | |
135 | ||
1da177e4 LT |
136 | case ACPI_TYPE_LOCAL_ALIAS: |
137 | case ACPI_TYPE_LOCAL_METHOD_ALIAS: | |
138 | ||
b8e4d893 BM |
139 | /* |
140 | * All aliases should have been resolved earlier, during the | |
141 | * operand resolution phase. | |
142 | */ | |
143 | ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object")); | |
1da177e4 LT |
144 | status = AE_AML_INTERNAL; |
145 | break; | |
146 | ||
1da177e4 LT |
147 | case ACPI_TYPE_PACKAGE: |
148 | default: | |
149 | ||
150 | /* | |
151 | * All other types than Alias and the various Fields come here, | |
152 | * including the untyped case - ACPI_TYPE_ANY. | |
153 | */ | |
154 | break; | |
155 | } | |
156 | ||
4be44fcd | 157 | return_ACPI_STATUS(status); |
1da177e4 LT |
158 | } |
159 | ||
1da177e4 LT |
160 | /******************************************************************************* |
161 | * | |
162 | * FUNCTION: acpi_ex_store_object_to_object | |
163 | * | |
164 | * PARAMETERS: source_desc - Object to store | |
165 | * dest_desc - Object to receive a copy of the source | |
166 | * new_desc - New object if dest_desc is obsoleted | |
167 | * walk_state - Current walk state | |
168 | * | |
169 | * RETURN: Status | |
170 | * | |
171 | * DESCRIPTION: "Store" an object to another object. This may include | |
172 | * converting the source type to the target type (implicit | |
173 | * conversion), and a copy of the value of the source to | |
174 | * the target. | |
175 | * | |
176 | * The Assignment of an object to another (not named) object | |
177 | * is handled here. | |
178 | * The Source passed in will replace the current value (if any) | |
179 | * with the input value. | |
180 | * | |
181 | * When storing into an object the data is converted to the | |
182 | * target object type then stored in the object. This means | |
183 | * that the target object type (for an initialized target) will | |
184 | * not be changed by a store operation. | |
185 | * | |
186 | * This module allows destination types of Number, String, | |
187 | * Buffer, and Package. | |
188 | * | |
189 | * Assumes parameters are already validated. NOTE: source_desc | |
190 | * resolution (from a reference object) must be performed by | |
191 | * the caller if necessary. | |
192 | * | |
193 | ******************************************************************************/ | |
194 | ||
195 | acpi_status | |
4be44fcd LB |
196 | acpi_ex_store_object_to_object(union acpi_operand_object *source_desc, |
197 | union acpi_operand_object *dest_desc, | |
198 | union acpi_operand_object **new_desc, | |
199 | struct acpi_walk_state *walk_state) | |
1da177e4 | 200 | { |
4be44fcd LB |
201 | union acpi_operand_object *actual_src_desc; |
202 | acpi_status status = AE_OK; | |
1da177e4 | 203 | |
b229cf92 | 204 | ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc); |
1da177e4 LT |
205 | |
206 | actual_src_desc = source_desc; | |
207 | if (!dest_desc) { | |
208 | /* | |
209 | * There is no destination object (An uninitialized node or | |
210 | * package element), so we can simply copy the source object | |
211 | * creating a new destination object | |
212 | */ | |
4be44fcd LB |
213 | status = |
214 | acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc, | |
215 | walk_state); | |
216 | return_ACPI_STATUS(status); | |
1da177e4 LT |
217 | } |
218 | ||
4be44fcd LB |
219 | if (ACPI_GET_OBJECT_TYPE(source_desc) != |
220 | ACPI_GET_OBJECT_TYPE(dest_desc)) { | |
1da177e4 LT |
221 | /* |
222 | * The source type does not match the type of the destination. | |
223 | * Perform the "implicit conversion" of the source to the current type | |
224 | * of the target as per the ACPI specification. | |
225 | * | |
226 | * If no conversion performed, actual_src_desc = source_desc. | |
227 | * Otherwise, actual_src_desc is a temporary object to hold the | |
228 | * converted object. | |
229 | */ | |
4be44fcd LB |
230 | status = |
231 | acpi_ex_convert_to_target_type(ACPI_GET_OBJECT_TYPE | |
232 | (dest_desc), source_desc, | |
233 | &actual_src_desc, | |
234 | walk_state); | |
235 | if (ACPI_FAILURE(status)) { | |
236 | return_ACPI_STATUS(status); | |
1da177e4 LT |
237 | } |
238 | ||
239 | if (source_desc == actual_src_desc) { | |
240 | /* | |
241 | * No conversion was performed. Return the source_desc as the | |
242 | * new object. | |
243 | */ | |
244 | *new_desc = source_desc; | |
4be44fcd | 245 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
246 | } |
247 | } | |
248 | ||
249 | /* | |
250 | * We now have two objects of identical types, and we can perform a | |
251 | * copy of the *value* of the source object. | |
252 | */ | |
4be44fcd | 253 | switch (ACPI_GET_OBJECT_TYPE(dest_desc)) { |
1da177e4 LT |
254 | case ACPI_TYPE_INTEGER: |
255 | ||
256 | dest_desc->integer.value = actual_src_desc->integer.value; | |
257 | ||
258 | /* Truncate value if we are executing from a 32-bit ACPI table */ | |
259 | ||
4be44fcd | 260 | acpi_ex_truncate_for32bit_table(dest_desc); |
1da177e4 LT |
261 | break; |
262 | ||
263 | case ACPI_TYPE_STRING: | |
264 | ||
4be44fcd LB |
265 | status = |
266 | acpi_ex_store_string_to_string(actual_src_desc, dest_desc); | |
1da177e4 LT |
267 | break; |
268 | ||
269 | case ACPI_TYPE_BUFFER: | |
270 | ||
4be44fcd LB |
271 | status = |
272 | acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc); | |
1da177e4 LT |
273 | break; |
274 | ||
275 | case ACPI_TYPE_PACKAGE: | |
276 | ||
4be44fcd LB |
277 | status = |
278 | acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc, | |
279 | walk_state); | |
1da177e4 LT |
280 | break; |
281 | ||
282 | default: | |
283 | /* | |
284 | * All other types come here. | |
285 | */ | |
b8e4d893 BM |
286 | ACPI_WARNING((AE_INFO, "Store into type %s not implemented", |
287 | acpi_ut_get_object_type_name(dest_desc))); | |
1da177e4 LT |
288 | |
289 | status = AE_NOT_IMPLEMENTED; | |
290 | break; | |
291 | } | |
292 | ||
293 | if (actual_src_desc != source_desc) { | |
52fc0b02 | 294 | |
1da177e4 LT |
295 | /* Delete the intermediate (temporary) source object */ |
296 | ||
4be44fcd | 297 | acpi_ut_remove_reference(actual_src_desc); |
1da177e4 LT |
298 | } |
299 | ||
300 | *new_desc = dest_desc; | |
4be44fcd | 301 | return_ACPI_STATUS(status); |
1da177e4 | 302 | } |