Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: exstoren - AML Interpreter object store support, |
| 4 | * Store to Node (namespace object) |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
Bob Moore | c8100dc | 2016-01-15 08:17:03 +0800 | [diff] [blame] | 9 | * Copyright (C) 2000 - 2016, Intel Corp. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <acpi/acpi.h> |
Len Brown | e2f7a77 | 2009-01-09 00:30:03 -0500 | [diff] [blame] | 46 | #include "accommon.h" |
| 47 | #include "acinterp.h" |
| 48 | #include "amlcode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define _COMPONENT ACPI_EXECUTER |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | ACPI_MODULE_NAME("exstoren") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 63 | * DESCRIPTION: Resolve an object. If the object is a reference, dereference |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | * it and return the actual object in the source_desc_ptr. |
| 65 | * |
| 66 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 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) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 72 | union acpi_operand_object *source_desc = *source_desc_ptr; |
| 73 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 75 | ACPI_FUNCTION_TRACE(ex_resolve_object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 77 | /* Ensure we have a Target that can be stored to */ |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | case ACPI_TYPE_INTEGER: |
| 89 | case ACPI_TYPE_STRING: |
| 90 | case ACPI_TYPE_BUFFER: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | /* |
| 92 | * Stores into a Field/Region or into a Integer/Buffer/String |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 93 | * are all essentially the same. This case handles the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | * "interchangeable" types Integer, String, and Buffer. |
| 95 | */ |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 96 | if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 97 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | /* Resolve a reference object first */ |
| 99 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | status = |
| 101 | acpi_ex_resolve_to_value(source_desc_ptr, |
| 102 | walk_state); |
| 103 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | 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 Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 114 | /* Must have a Integer, Buffer, or String */ |
| 115 | |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 116 | 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 Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 121 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 122 | /* Conversion successful but still not a valid type */ |
| 123 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 124 | ACPI_ERROR((AE_INFO, |
Bob Moore | a5922a1 | 2015-10-19 10:24:58 +0800 | [diff] [blame] | 125 | "Cannot assign type [%s] to [%s] (must be type Int/Str/Buf)", |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 126 | acpi_ut_get_object_type_name(source_desc), |
| 127 | acpi_ut_get_type_name(target_type))); |
Bob Moore | a5922a1 | 2015-10-19 10:24:58 +0800 | [diff] [blame] | 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | status = AE_AML_OPERAND_TYPE; |
| 130 | } |
| 131 | break; |
| 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | case ACPI_TYPE_LOCAL_ALIAS: |
| 134 | case ACPI_TYPE_LOCAL_METHOD_ALIAS: |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 135 | /* |
| 136 | * All aliases should have been resolved earlier, during the |
| 137 | * operand resolution phase. |
| 138 | */ |
| 139 | ACPI_ERROR((AE_INFO, "Store into an unresolved Alias object")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | status = AE_AML_INTERNAL; |
| 141 | break; |
| 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | case ACPI_TYPE_PACKAGE: |
| 144 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | /* |
| 146 | * All other types than Alias and the various Fields come here, |
| 147 | * including the untyped case - ACPI_TYPE_ANY. |
| 148 | */ |
| 149 | break; |
| 150 | } |
| 151 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 152 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | /******************************************************************************* |
| 156 | * |
| 157 | * FUNCTION: acpi_ex_store_object_to_object |
| 158 | * |
| 159 | * PARAMETERS: source_desc - Object to store |
| 160 | * dest_desc - Object to receive a copy of the source |
| 161 | * new_desc - New object if dest_desc is obsoleted |
| 162 | * walk_state - Current walk state |
| 163 | * |
| 164 | * RETURN: Status |
| 165 | * |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 166 | * DESCRIPTION: "Store" an object to another object. This may include |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | * converting the source type to the target type (implicit |
| 168 | * conversion), and a copy of the value of the source to |
| 169 | * the target. |
| 170 | * |
| 171 | * The Assignment of an object to another (not named) object |
| 172 | * is handled here. |
| 173 | * The Source passed in will replace the current value (if any) |
| 174 | * with the input value. |
| 175 | * |
| 176 | * When storing into an object the data is converted to the |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 177 | * target object type then stored in the object. This means |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | * that the target object type (for an initialized target) will |
| 179 | * not be changed by a store operation. |
| 180 | * |
| 181 | * This module allows destination types of Number, String, |
| 182 | * Buffer, and Package. |
| 183 | * |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 184 | * Assumes parameters are already validated. NOTE: source_desc |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | * resolution (from a reference object) must be performed by |
| 186 | * the caller if necessary. |
| 187 | * |
| 188 | ******************************************************************************/ |
| 189 | |
| 190 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 191 | acpi_ex_store_object_to_object(union acpi_operand_object *source_desc, |
| 192 | union acpi_operand_object *dest_desc, |
| 193 | union acpi_operand_object **new_desc, |
| 194 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 196 | union acpi_operand_object *actual_src_desc; |
| 197 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 199 | ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_object, source_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | actual_src_desc = source_desc; |
| 202 | if (!dest_desc) { |
| 203 | /* |
| 204 | * There is no destination object (An uninitialized node or |
| 205 | * package element), so we can simply copy the source object |
| 206 | * creating a new destination object |
| 207 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 208 | status = |
| 209 | acpi_ut_copy_iobject_to_iobject(actual_src_desc, new_desc, |
| 210 | walk_state); |
| 211 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 214 | if (source_desc->common.type != dest_desc->common.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | /* |
| 216 | * The source type does not match the type of the destination. |
| 217 | * Perform the "implicit conversion" of the source to the current type |
| 218 | * of the target as per the ACPI specification. |
| 219 | * |
| 220 | * If no conversion performed, actual_src_desc = source_desc. |
| 221 | * Otherwise, actual_src_desc is a temporary object to hold the |
| 222 | * converted object. |
| 223 | */ |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 224 | status = acpi_ex_convert_to_target_type(dest_desc->common.type, |
| 225 | source_desc, |
| 226 | &actual_src_desc, |
| 227 | walk_state); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 228 | if (ACPI_FAILURE(status)) { |
| 229 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | if (source_desc == actual_src_desc) { |
| 233 | /* |
| 234 | * No conversion was performed. Return the source_desc as the |
| 235 | * new object. |
| 236 | */ |
| 237 | *new_desc = source_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 238 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | } |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * We now have two objects of identical types, and we can perform a |
| 244 | * copy of the *value* of the source object. |
| 245 | */ |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 246 | switch (dest_desc->common.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | case ACPI_TYPE_INTEGER: |
| 248 | |
| 249 | dest_desc->integer.value = actual_src_desc->integer.value; |
| 250 | |
| 251 | /* Truncate value if we are executing from a 32-bit ACPI table */ |
| 252 | |
Bob Moore | ef42e53 | 2012-12-31 00:07:18 +0000 | [diff] [blame] | 253 | (void)acpi_ex_truncate_for32bit_table(dest_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | break; |
| 255 | |
| 256 | case ACPI_TYPE_STRING: |
| 257 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 258 | status = |
| 259 | acpi_ex_store_string_to_string(actual_src_desc, dest_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | break; |
| 261 | |
| 262 | case ACPI_TYPE_BUFFER: |
| 263 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 264 | status = |
| 265 | acpi_ex_store_buffer_to_buffer(actual_src_desc, dest_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | break; |
| 267 | |
| 268 | case ACPI_TYPE_PACKAGE: |
| 269 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 270 | status = |
| 271 | acpi_ut_copy_iobject_to_iobject(actual_src_desc, &dest_desc, |
| 272 | walk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | break; |
| 274 | |
| 275 | default: |
| 276 | /* |
| 277 | * All other types come here. |
| 278 | */ |
Bob Moore | a5922a1 | 2015-10-19 10:24:58 +0800 | [diff] [blame] | 279 | ACPI_WARNING((AE_INFO, "Store into type [%s] not implemented", |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 280 | acpi_ut_get_object_type_name(dest_desc))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
| 282 | status = AE_NOT_IMPLEMENTED; |
| 283 | break; |
| 284 | } |
| 285 | |
| 286 | if (actual_src_desc != source_desc) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | /* Delete the intermediate (temporary) source object */ |
| 289 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 290 | acpi_ut_remove_reference(actual_src_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | *new_desc = dest_desc; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 294 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | } |