blob: 04bd16c08f9e5fc08cf330475c44660d19b02ab3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: exstoren - AML Interpreter object store support,
4 * Store to Node (namespace object)
5 *
6 *****************************************************************************/
7
8/*
Bob Moorefbb7a2d2014-02-08 09:42:25 +08009 * Copyright (C) 2000 - 2014, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050046#include "accommon.h"
47#include "acinterp.h"
48#include "amlcode.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("exstoren")
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
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 *
Bob Moore73a30902012-10-31 02:26:55 +000063 * DESCRIPTION: Resolve an object. If the object is a reference, dereference
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 * it and return the actual object in the source_desc_ptr.
65 *
66 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -070067acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040068acpi_ex_resolve_object(union acpi_operand_object **source_desc_ptr,
69 acpi_object_type target_type,
70 struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
Len Brown4be44fc2005-08-05 00:44:28 -040072 union acpi_operand_object *source_desc = *source_desc_ptr;
73 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Bob Mooreb229cf92006-04-21 17:15:00 -040075 ACPI_FUNCTION_TRACE(ex_resolve_object);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
Robert Moore44f6c012005-04-18 22:49:35 -040077 /* Ensure we have a Target that can be stored to */
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 case ACPI_TYPE_INTEGER:
89 case ACPI_TYPE_STRING:
90 case ACPI_TYPE_BUFFER:
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 /*
92 * Stores into a Field/Region or into a Integer/Buffer/String
Bob Moore73a30902012-10-31 02:26:55 +000093 * are all essentially the same. This case handles the
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 * "interchangeable" types Integer, String, and Buffer.
95 */
Bob Moore3371c192009-02-18 14:44:03 +080096 if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) {
Bob Moore52fc0b02006-10-02 00:00:00 -040097
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 /* Resolve a reference object first */
99
Len Brown4be44fc2005-08-05 00:44:28 -0400100 status =
101 acpi_ex_resolve_to_value(source_desc_ptr,
102 walk_state);
103 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 break;
105 }
106 }
107
108 /* For copy_object, no further validation necessary */
109
110 if (walk_state->opcode == AML_COPY_OP) {
111 break;
112 }
113
Robert Moore44f6c012005-04-18 22:49:35 -0400114 /* Must have a Integer, Buffer, or String */
115
Bob Moore3371c192009-02-18 14:44:03 +0800116 if ((source_desc->common.type != ACPI_TYPE_INTEGER) &&
117 (source_desc->common.type != ACPI_TYPE_BUFFER) &&
118 (source_desc->common.type != ACPI_TYPE_STRING) &&
119 !((source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) &&
120 (source_desc->reference.class == ACPI_REFCLASS_TABLE))) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400121
Robert Moore44f6c012005-04-18 22:49:35 -0400122 /* Conversion successful but still not a valid type */
123
Bob Mooreb8e4d892006-01-27 16:43:00 -0500124 ACPI_ERROR((AE_INFO,
125 "Cannot assign type %s to %s (must be type Int/Str/Buf)",
126 acpi_ut_get_object_type_name(source_desc),
127 acpi_ut_get_type_name(target_type)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 status = AE_AML_OPERAND_TYPE;
129 }
130 break;
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 case ACPI_TYPE_LOCAL_ALIAS:
133 case ACPI_TYPE_LOCAL_METHOD_ALIAS:
Bob Mooreb8e4d892006-01-27 16:43:00 -0500134 /*
135 * All aliases should have been resolved earlier, during the
136 * operand resolution phase.
137 */
138 ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 status = AE_AML_INTERNAL;
140 break;
141
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 case ACPI_TYPE_PACKAGE:
143 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 /*
145 * All other types than Alias and the various Fields come here,
146 * including the untyped case - ACPI_TYPE_ANY.
147 */
148 break;
149 }
150
Len Brown4be44fc2005-08-05 00:44:28 -0400151 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152}
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154/*******************************************************************************
155 *
156 * FUNCTION: acpi_ex_store_object_to_object
157 *
158 * PARAMETERS: source_desc - Object to store
159 * dest_desc - Object to receive a copy of the source
160 * new_desc - New object if dest_desc is obsoleted
161 * walk_state - Current walk state
162 *
163 * RETURN: Status
164 *
Bob Moore73a30902012-10-31 02:26:55 +0000165 * DESCRIPTION: "Store" an object to another object. This may include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 * converting the source type to the target type (implicit
167 * conversion), and a copy of the value of the source to
168 * the target.
169 *
170 * The Assignment of an object to another (not named) object
171 * is handled here.
172 * The Source passed in will replace the current value (if any)
173 * with the input value.
174 *
175 * When storing into an object the data is converted to the
Bob Moore73a30902012-10-31 02:26:55 +0000176 * target object type then stored in the object. This means
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 * that the target object type (for an initialized target) will
178 * not be changed by a store operation.
179 *
180 * This module allows destination types of Number, String,
181 * Buffer, and Package.
182 *
Bob Moore73a30902012-10-31 02:26:55 +0000183 * Assumes parameters are already validated. NOTE: source_desc
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 * resolution (from a reference object) must be performed by
185 * the caller if necessary.
186 *
187 ******************************************************************************/
188
189acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400190acpi_ex_store_object_to_object(union acpi_operand_object *source_desc,
191 union acpi_operand_object *dest_desc,
192 union acpi_operand_object **new_desc,
193 struct acpi_walk_state *walk_state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
Len Brown4be44fc2005-08-05 00:44:28 -0400195 union acpi_operand_object *actual_src_desc;
196 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Bob Mooreb229cf92006-04-21 17:15:00 -0400198 ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
200 actual_src_desc = source_desc;
201 if (!dest_desc) {
202 /*
203 * There is no destination object (An uninitialized node or
204 * package element), so we can simply copy the source object
205 * creating a new destination object
206 */
Len Brown4be44fc2005-08-05 00:44:28 -0400207 status =
208 acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc,
209 walk_state);
210 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 }
212
Bob Moore3371c192009-02-18 14:44:03 +0800213 if (source_desc->common.type != dest_desc->common.type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 /*
215 * The source type does not match the type of the destination.
216 * Perform the "implicit conversion" of the source to the current type
217 * of the target as per the ACPI specification.
218 *
219 * If no conversion performed, actual_src_desc = source_desc.
220 * Otherwise, actual_src_desc is a temporary object to hold the
221 * converted object.
222 */
Bob Moore3371c192009-02-18 14:44:03 +0800223 status = acpi_ex_convert_to_target_type(dest_desc->common.type,
224 source_desc,
225 &actual_src_desc,
226 walk_state);
Len Brown4be44fc2005-08-05 00:44:28 -0400227 if (ACPI_FAILURE(status)) {
228 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 }
230
231 if (source_desc == actual_src_desc) {
232 /*
233 * No conversion was performed. Return the source_desc as the
234 * new object.
235 */
236 *new_desc = source_desc;
Len Brown4be44fc2005-08-05 00:44:28 -0400237 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 }
239 }
240
241 /*
242 * We now have two objects of identical types, and we can perform a
243 * copy of the *value* of the source object.
244 */
Bob Moore3371c192009-02-18 14:44:03 +0800245 switch (dest_desc->common.type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 case ACPI_TYPE_INTEGER:
247
248 dest_desc->integer.value = actual_src_desc->integer.value;
249
250 /* Truncate value if we are executing from a 32-bit ACPI table */
251
Bob Mooreef42e532012-12-31 00:07:18 +0000252 (void)acpi_ex_truncate_for32bit_table(dest_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 break;
254
255 case ACPI_TYPE_STRING:
256
Len Brown4be44fc2005-08-05 00:44:28 -0400257 status =
258 acpi_ex_store_string_to_string(actual_src_desc, dest_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 break;
260
261 case ACPI_TYPE_BUFFER:
262
Len Brown4be44fc2005-08-05 00:44:28 -0400263 status =
264 acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 break;
266
267 case ACPI_TYPE_PACKAGE:
268
Len Brown4be44fc2005-08-05 00:44:28 -0400269 status =
270 acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc,
271 walk_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 break;
273
274 default:
275 /*
276 * All other types come here.
277 */
Bob Mooreb8e4d892006-01-27 16:43:00 -0500278 ACPI_WARNING((AE_INFO, "Store into type %s not implemented",
279 acpi_ut_get_object_type_name(dest_desc)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
281 status = AE_NOT_IMPLEMENTED;
282 break;
283 }
284
285 if (actual_src_desc != source_desc) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400286
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 /* Delete the intermediate (temporary) source object */
288
Len Brown4be44fc2005-08-05 00:44:28 -0400289 acpi_ut_remove_reference(actual_src_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 }
291
292 *new_desc = dest_desc;
Len Brown4be44fc2005-08-05 00:44:28 -0400293 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294}