exstoren.c revision 193251
1119098Sanholt 2145132Sanholt/****************************************************************************** 3119098Sanholt * 4112015Sanholt * Module Name: exstoren - AML Interpreter object store support, 5130331Sanholt * Store to Node (namespace object) 6119098Sanholt * $Revision: 1.71 $ 7119098Sanholt * 8139749Simp *****************************************************************************/ 9112015Sanholt 10112015Sanholt/****************************************************************************** 11112015Sanholt * 12112015Sanholt * 1. Copyright Notice 13112015Sanholt * 14112015Sanholt * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp. 15112015Sanholt * All rights reserved. 16112015Sanholt * 17112015Sanholt * 2. License 18112015Sanholt * 19112015Sanholt * 2.1. This is your license from Intel Corp. under its intellectual property 20112015Sanholt * rights. You may have additional license terms from the party that provided 21112015Sanholt * you this software, covering your right to use that party's intellectual 22112015Sanholt * property rights. 23112015Sanholt * 24112015Sanholt * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 25112015Sanholt * copy of the source code appearing in this file ("Covered Code") an 26112015Sanholt * irrevocable, perpetual, worldwide license under Intel's copyrights in the 27112015Sanholt * base code distributed originally by Intel ("Original Intel Code") to copy, 28112015Sanholt * make derivatives, distribute, use and display any portion of the Covered 29112015Sanholt * Code in any form, with the right to sublicense such rights; and 30112015Sanholt * 31112015Sanholt * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 32152909Sanholt * license (with the right to sublicense), under only those claims of Intel 33152909Sanholt * patents that are infringed by the Original Intel Code, to make, use, sell, 34152909Sanholt * offer to sell, and import the Covered Code and derivative works thereof 35112015Sanholt * solely to the minimum extent necessary to exercise the above copyright 36112015Sanholt * license, and in no event shall the patent license extend to any additions 37112015Sanholt * to or modifications of the Original Intel Code. No other license or right 38130331Sanholt * is granted directly or by implication, estoppel or otherwise; 39130331Sanholt * 40130331Sanholt * The above copyright and patent license is granted only if the following 41130331Sanholt * conditions are met: 42130331Sanholt * 43130331Sanholt * 3. Conditions 44145132Sanholt * 45130331Sanholt * 3.1. Redistribution of Source with Rights to Further Distribute Source. 46130331Sanholt * Redistribution of source code of any substantial portion of the Covered 47182080Srnoland * Code or modification with rights to further distribute source must include 48130331Sanholt * the above Copyright Notice, the above License, this list of Conditions, 49130331Sanholt * and the following Disclaimer and Export Compliance provision. In addition, 50119098Sanholt * Licensee must cause all Covered Code to which Licensee contributes to 51182080Srnoland * contain a file documenting the changes Licensee made to create that Covered 52112015Sanholt * Code and the date of any change. Licensee must include in that file the 53130331Sanholt * documentation of any changes made by any predecessor Licensee. Licensee 54130331Sanholt * must include a prominent statement that the modification is derived, 55119098Sanholt * directly or indirectly, from Original Intel Code. 56182080Srnoland * 57145132Sanholt * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 58145132Sanholt * Redistribution of source code of any substantial portion of the Covered 59182080Srnoland * Code or modification without rights to further distribute source must 60112015Sanholt * include the following Disclaimer and Export Compliance provision in the 61119098Sanholt * documentation and/or other materials provided with distribution. In 62182080Srnoland * addition, Licensee may not authorize further sublicense of source of any 63145132Sanholt * portion of the Covered Code, and must include terms to the effect that the 64145132Sanholt * license from Licensee to its licensee is limited to the intellectual 65145132Sanholt * property embodied in the software Licensee provides to its licensee, and 66145132Sanholt * not to intellectual property embodied in modifications its licensee may 67145132Sanholt * make. 68182080Srnoland * 69112015Sanholt * 3.3. Redistribution of Executable. Redistribution in executable form of any 70119098Sanholt * substantial portion of the Covered Code or modification must reproduce the 71182080Srnoland * above Copyright Notice, and the following Disclaimer and Export Compliance 72119098Sanholt * provision in the documentation and/or other materials provided with the 73182080Srnoland * distribution. 74119098Sanholt * 75182080Srnoland * 3.4. Intel retains all right, title, and interest in and to the Original 76182080Srnoland * Intel Code. 77182080Srnoland * 78145132Sanholt * 3.5. Neither the name Intel nor any other trademark owned or controlled by 79182080Srnoland * Intel shall be used in advertising or otherwise to promote the sale, use or 80112015Sanholt * other dealings in products derived from or relating to the Covered Code 81182080Srnoland * without prior written authorization from Intel. 82182080Srnoland * 83182080Srnoland * 4. Disclaimer and Export Compliance 84182080Srnoland * 85182080Srnoland * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 86182080Srnoland * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 87145132Sanholt * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 88 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 89 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 90 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 91 * PARTICULAR PURPOSE. 92 * 93 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 94 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 95 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 96 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 97 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 98 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 99 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 100 * LIMITED REMEDY. 101 * 102 * 4.3. Licensee shall not export, either directly or indirectly, any of this 103 * software or system incorporating such software without first obtaining any 104 * required license or other approval from the U. S. Department of Commerce or 105 * any other agency or department of the United States Government. In the 106 * event Licensee exports any such software from the United States or 107 * re-exports any such software from a foreign destination, Licensee shall 108 * ensure that the distribution and export/re-export of the software is in 109 * compliance with all laws, regulations, orders, or other restrictions of the 110 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 111 * any of its subsidiaries will export/re-export any technical data, process, 112 * software, or service, directly or indirectly, to any country for which the 113 * United States government or any agency thereof requires an export license, 114 * other governmental approval, or letter of assurance, without first obtaining 115 * such license, approval or letter. 116 * 117 *****************************************************************************/ 118 119#define __EXSTOREN_C__ 120 121#include "acpi.h" 122#include "acinterp.h" 123#include "amlcode.h" 124 125 126#define _COMPONENT ACPI_EXECUTER 127 ACPI_MODULE_NAME ("exstoren") 128 129 130/******************************************************************************* 131 * 132 * FUNCTION: AcpiExResolveObject 133 * 134 * PARAMETERS: SourceDescPtr - Pointer to the source object 135 * TargetType - Current type of the target 136 * WalkState - Current walk state 137 * 138 * RETURN: Status, resolved object in SourceDescPtr. 139 * 140 * DESCRIPTION: Resolve an object. If the object is a reference, dereference 141 * it and return the actual object in the SourceDescPtr. 142 * 143 ******************************************************************************/ 144 145ACPI_STATUS 146AcpiExResolveObject ( 147 ACPI_OPERAND_OBJECT **SourceDescPtr, 148 ACPI_OBJECT_TYPE TargetType, 149 ACPI_WALK_STATE *WalkState) 150{ 151 ACPI_OPERAND_OBJECT *SourceDesc = *SourceDescPtr; 152 ACPI_STATUS Status = AE_OK; 153 154 155 ACPI_FUNCTION_TRACE (ExResolveObject); 156 157 158 /* Ensure we have a Target that can be stored to */ 159 160 switch (TargetType) 161 { 162 case ACPI_TYPE_BUFFER_FIELD: 163 case ACPI_TYPE_LOCAL_REGION_FIELD: 164 case ACPI_TYPE_LOCAL_BANK_FIELD: 165 case ACPI_TYPE_LOCAL_INDEX_FIELD: 166 /* 167 * These cases all require only Integers or values that 168 * can be converted to Integers (Strings or Buffers) 169 */ 170 171 case ACPI_TYPE_INTEGER: 172 case ACPI_TYPE_STRING: 173 case ACPI_TYPE_BUFFER: 174 175 /* 176 * Stores into a Field/Region or into a Integer/Buffer/String 177 * are all essentially the same. This case handles the 178 * "interchangeable" types Integer, String, and Buffer. 179 */ 180 if (ACPI_GET_OBJECT_TYPE (SourceDesc) == ACPI_TYPE_LOCAL_REFERENCE) 181 { 182 /* Resolve a reference object first */ 183 184 Status = AcpiExResolveToValue (SourceDescPtr, WalkState); 185 if (ACPI_FAILURE (Status)) 186 { 187 break; 188 } 189 } 190 191 /* For CopyObject, no further validation necessary */ 192 193 if (WalkState->Opcode == AML_COPY_OP) 194 { 195 break; 196 } 197 198 /* Must have a Integer, Buffer, or String */ 199 200 if ((ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_INTEGER) && 201 (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_BUFFER) && 202 (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_TYPE_STRING) && 203 !((ACPI_GET_OBJECT_TYPE (SourceDesc) == ACPI_TYPE_LOCAL_REFERENCE) && (SourceDesc->Reference.Opcode == AML_LOAD_OP))) 204 { 205 /* Conversion successful but still not a valid type */ 206 207 ACPI_ERROR ((AE_INFO, 208 "Cannot assign type %s to %s (must be type Int/Str/Buf)", 209 AcpiUtGetObjectTypeName (SourceDesc), 210 AcpiUtGetTypeName (TargetType))); 211 Status = AE_AML_OPERAND_TYPE; 212 } 213 break; 214 215 216 case ACPI_TYPE_LOCAL_ALIAS: 217 case ACPI_TYPE_LOCAL_METHOD_ALIAS: 218 219 /* 220 * All aliases should have been resolved earlier, during the 221 * operand resolution phase. 222 */ 223 ACPI_ERROR ((AE_INFO, "Store into an unresolved Alias object")); 224 Status = AE_AML_INTERNAL; 225 break; 226 227 228 case ACPI_TYPE_PACKAGE: 229 default: 230 231 /* 232 * All other types than Alias and the various Fields come here, 233 * including the untyped case - ACPI_TYPE_ANY. 234 */ 235 break; 236 } 237 238 return_ACPI_STATUS (Status); 239} 240 241 242/******************************************************************************* 243 * 244 * FUNCTION: AcpiExStoreObjectToObject 245 * 246 * PARAMETERS: SourceDesc - Object to store 247 * DestDesc - Object to receive a copy of the source 248 * NewDesc - New object if DestDesc is obsoleted 249 * WalkState - Current walk state 250 * 251 * RETURN: Status 252 * 253 * DESCRIPTION: "Store" an object to another object. This may include 254 * converting the source type to the target type (implicit 255 * conversion), and a copy of the value of the source to 256 * the target. 257 * 258 * The Assignment of an object to another (not named) object 259 * is handled here. 260 * The Source passed in will replace the current value (if any) 261 * with the input value. 262 * 263 * When storing into an object the data is converted to the 264 * target object type then stored in the object. This means 265 * that the target object type (for an initialized target) will 266 * not be changed by a store operation. 267 * 268 * This module allows destination types of Number, String, 269 * Buffer, and Package. 270 * 271 * Assumes parameters are already validated. NOTE: SourceDesc 272 * resolution (from a reference object) must be performed by 273 * the caller if necessary. 274 * 275 ******************************************************************************/ 276 277ACPI_STATUS 278AcpiExStoreObjectToObject ( 279 ACPI_OPERAND_OBJECT *SourceDesc, 280 ACPI_OPERAND_OBJECT *DestDesc, 281 ACPI_OPERAND_OBJECT **NewDesc, 282 ACPI_WALK_STATE *WalkState) 283{ 284 ACPI_OPERAND_OBJECT *ActualSrcDesc; 285 ACPI_STATUS Status = AE_OK; 286 287 288 ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToObject, SourceDesc); 289 290 291 ActualSrcDesc = SourceDesc; 292 if (!DestDesc) 293 { 294 /* 295 * There is no destination object (An uninitialized node or 296 * package element), so we can simply copy the source object 297 * creating a new destination object 298 */ 299 Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, NewDesc, WalkState); 300 return_ACPI_STATUS (Status); 301 } 302 303 if (ACPI_GET_OBJECT_TYPE (SourceDesc) != ACPI_GET_OBJECT_TYPE (DestDesc)) 304 { 305 /* 306 * The source type does not match the type of the destination. 307 * Perform the "implicit conversion" of the source to the current type 308 * of the target as per the ACPI specification. 309 * 310 * If no conversion performed, ActualSrcDesc = SourceDesc. 311 * Otherwise, ActualSrcDesc is a temporary object to hold the 312 * converted object. 313 */ 314 Status = AcpiExConvertToTargetType (ACPI_GET_OBJECT_TYPE (DestDesc), 315 SourceDesc, &ActualSrcDesc, WalkState); 316 if (ACPI_FAILURE (Status)) 317 { 318 return_ACPI_STATUS (Status); 319 } 320 321 if (SourceDesc == ActualSrcDesc) 322 { 323 /* 324 * No conversion was performed. Return the SourceDesc as the 325 * new object. 326 */ 327 *NewDesc = SourceDesc; 328 return_ACPI_STATUS (AE_OK); 329 } 330 } 331 332 /* 333 * We now have two objects of identical types, and we can perform a 334 * copy of the *value* of the source object. 335 */ 336 switch (ACPI_GET_OBJECT_TYPE (DestDesc)) 337 { 338 case ACPI_TYPE_INTEGER: 339 340 DestDesc->Integer.Value = ActualSrcDesc->Integer.Value; 341 342 /* Truncate value if we are executing from a 32-bit ACPI table */ 343 344 AcpiExTruncateFor32bitTable (DestDesc); 345 break; 346 347 case ACPI_TYPE_STRING: 348 349 Status = AcpiExStoreStringToString (ActualSrcDesc, DestDesc); 350 break; 351 352 case ACPI_TYPE_BUFFER: 353 354 Status = AcpiExStoreBufferToBuffer (ActualSrcDesc, DestDesc); 355 break; 356 357 case ACPI_TYPE_PACKAGE: 358 359 Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, &DestDesc, 360 WalkState); 361 break; 362 363 default: 364 /* 365 * All other types come here. 366 */ 367 ACPI_WARNING ((AE_INFO, "Store into type %s not implemented", 368 AcpiUtGetObjectTypeName (DestDesc))); 369 370 Status = AE_NOT_IMPLEMENTED; 371 break; 372 } 373 374 if (ActualSrcDesc != SourceDesc) 375 { 376 /* Delete the intermediate (temporary) source object */ 377 378 AcpiUtRemoveReference (ActualSrcDesc); 379 } 380 381 *NewDesc = DestDesc; 382 return_ACPI_STATUS (Status); 383} 384 385 386