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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 - 2011, 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
52ACPI_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 ******************************************************************************/
68acpi_status
69acpi_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
194acpi_status
195acpi_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}
1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: exstoren - AML Interpreter object store support,
5 * Store to Node (namespace object)
6 *
7 * Copyright (C) 2000 - 2019, Intel Corp.
8 *
9 *****************************************************************************/
10
11#include <acpi/acpi.h>
12#include "accommon.h"
13#include "acinterp.h"
14#include "amlcode.h"
15
16#define _COMPONENT ACPI_EXECUTER
17ACPI_MODULE_NAME("exstoren")
18
19/*******************************************************************************
20 *
21 * FUNCTION: acpi_ex_resolve_object
22 *
23 * PARAMETERS: source_desc_ptr - Pointer to the source object
24 * target_type - Current type of the target
25 * walk_state - Current walk state
26 *
27 * RETURN: Status, resolved object in source_desc_ptr.
28 *
29 * DESCRIPTION: Resolve an object. If the object is a reference, dereference
30 * it and return the actual object in the source_desc_ptr.
31 *
32 ******************************************************************************/
33acpi_status
34acpi_ex_resolve_object(union acpi_operand_object **source_desc_ptr,
35 acpi_object_type target_type,
36 struct acpi_walk_state *walk_state)
37{
38 union acpi_operand_object *source_desc = *source_desc_ptr;
39 acpi_status status = AE_OK;
40
41 ACPI_FUNCTION_TRACE(ex_resolve_object);
42
43 /* Ensure we have a Target that can be stored to */
44
45 switch (target_type) {
46 case ACPI_TYPE_BUFFER_FIELD:
47 case ACPI_TYPE_LOCAL_REGION_FIELD:
48 case ACPI_TYPE_LOCAL_BANK_FIELD:
49 case ACPI_TYPE_LOCAL_INDEX_FIELD:
50 /*
51 * These cases all require only Integers or values that
52 * can be converted to Integers (Strings or Buffers)
53 */
54 case ACPI_TYPE_INTEGER:
55 case ACPI_TYPE_STRING:
56 case ACPI_TYPE_BUFFER:
57 /*
58 * Stores into a Field/Region or into a Integer/Buffer/String
59 * are all essentially the same. This case handles the
60 * "interchangeable" types Integer, String, and Buffer.
61 */
62 if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) {
63
64 /* Resolve a reference object first */
65
66 status =
67 acpi_ex_resolve_to_value(source_desc_ptr,
68 walk_state);
69 if (ACPI_FAILURE(status)) {
70 break;
71 }
72 }
73
74 /* For copy_object, no further validation necessary */
75
76 if (walk_state->opcode == AML_COPY_OBJECT_OP) {
77 break;
78 }
79
80 /* Must have a Integer, Buffer, or String */
81
82 if ((source_desc->common.type != ACPI_TYPE_INTEGER) &&
83 (source_desc->common.type != ACPI_TYPE_BUFFER) &&
84 (source_desc->common.type != ACPI_TYPE_STRING) &&
85 !((source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) &&
86 (source_desc->reference.class == ACPI_REFCLASS_TABLE))) {
87
88 /* Conversion successful but still not a valid type */
89
90 ACPI_ERROR((AE_INFO,
91 "Cannot assign type [%s] to [%s] (must be type Int/Str/Buf)",
92 acpi_ut_get_object_type_name(source_desc),
93 acpi_ut_get_type_name(target_type)));
94
95 status = AE_AML_OPERAND_TYPE;
96 }
97 break;
98
99 case ACPI_TYPE_LOCAL_ALIAS:
100 case ACPI_TYPE_LOCAL_METHOD_ALIAS:
101 /*
102 * All aliases should have been resolved earlier, during the
103 * operand resolution phase.
104 */
105 ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object"));
106 status = AE_AML_INTERNAL;
107 break;
108
109 case ACPI_TYPE_PACKAGE:
110 default:
111 /*
112 * All other types than Alias and the various Fields come here,
113 * including the untyped case - ACPI_TYPE_ANY.
114 */
115 break;
116 }
117
118 return_ACPI_STATUS(status);
119}
120
121/*******************************************************************************
122 *
123 * FUNCTION: acpi_ex_store_object_to_object
124 *
125 * PARAMETERS: source_desc - Object to store
126 * dest_desc - Object to receive a copy of the source
127 * new_desc - New object if dest_desc is obsoleted
128 * walk_state - Current walk state
129 *
130 * RETURN: Status
131 *
132 * DESCRIPTION: "Store" an object to another object. This may include
133 * converting the source type to the target type (implicit
134 * conversion), and a copy of the value of the source to
135 * the target.
136 *
137 * The Assignment of an object to another (not named) object
138 * is handled here.
139 * The Source passed in will replace the current value (if any)
140 * with the input value.
141 *
142 * When storing into an object the data is converted to the
143 * target object type then stored in the object. This means
144 * that the target object type (for an initialized target) will
145 * not be changed by a store operation.
146 *
147 * This module allows destination types of Number, String,
148 * Buffer, and Package.
149 *
150 * Assumes parameters are already validated. NOTE: source_desc
151 * resolution (from a reference object) must be performed by
152 * the caller if necessary.
153 *
154 ******************************************************************************/
155
156acpi_status
157acpi_ex_store_object_to_object(union acpi_operand_object *source_desc,
158 union acpi_operand_object *dest_desc,
159 union acpi_operand_object **new_desc,
160 struct acpi_walk_state *walk_state)
161{
162 union acpi_operand_object *actual_src_desc;
163 acpi_status status = AE_OK;
164
165 ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc);
166
167 actual_src_desc = source_desc;
168 if (!dest_desc) {
169 /*
170 * There is no destination object (An uninitialized node or
171 * package element), so we can simply copy the source object
172 * creating a new destination object
173 */
174 status =
175 acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc,
176 walk_state);
177 return_ACPI_STATUS(status);
178 }
179
180 if (source_desc->common.type != dest_desc->common.type) {
181 /*
182 * The source type does not match the type of the destination.
183 * Perform the "implicit conversion" of the source to the current type
184 * of the target as per the ACPI specification.
185 *
186 * If no conversion performed, actual_src_desc = source_desc.
187 * Otherwise, actual_src_desc is a temporary object to hold the
188 * converted object.
189 */
190 status = acpi_ex_convert_to_target_type(dest_desc->common.type,
191 source_desc,
192 &actual_src_desc,
193 walk_state);
194 if (ACPI_FAILURE(status)) {
195 return_ACPI_STATUS(status);
196 }
197
198 if (source_desc == actual_src_desc) {
199 /*
200 * No conversion was performed. Return the source_desc as the
201 * new object.
202 */
203 *new_desc = source_desc;
204 return_ACPI_STATUS(AE_OK);
205 }
206 }
207
208 /*
209 * We now have two objects of identical types, and we can perform a
210 * copy of the *value* of the source object.
211 */
212 switch (dest_desc->common.type) {
213 case ACPI_TYPE_INTEGER:
214
215 dest_desc->integer.value = actual_src_desc->integer.value;
216
217 /* Truncate value if we are executing from a 32-bit ACPI table */
218
219 (void)acpi_ex_truncate_for32bit_table(dest_desc);
220 break;
221
222 case ACPI_TYPE_STRING:
223
224 status =
225 acpi_ex_store_string_to_string(actual_src_desc, dest_desc);
226 break;
227
228 case ACPI_TYPE_BUFFER:
229
230 status =
231 acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc);
232 break;
233
234 case ACPI_TYPE_PACKAGE:
235
236 status =
237 acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc,
238 walk_state);
239 break;
240
241 default:
242 /*
243 * All other types come here.
244 */
245 ACPI_WARNING((AE_INFO, "Store into type [%s] not implemented",
246 acpi_ut_get_object_type_name(dest_desc)));
247
248 status = AE_NOT_IMPLEMENTED;
249 break;
250 }
251
252 if (actual_src_desc != source_desc) {
253
254 /* Delete the intermediate (temporary) source object */
255
256 acpi_ut_remove_reference(actual_src_desc);
257 }
258
259 *new_desc = dest_desc;
260 return_ACPI_STATUS(status);
261}