exstoren.c revision 91116
1 2/****************************************************************************** 3 * 4 * Module Name: exstoren - AML Interpreter object store support, 5 * Store to Node (namespace object) 6 * $Revision: 46 $ 7 * 8 *****************************************************************************/ 9 10/****************************************************************************** 11 * 12 * 1. Copyright Notice 13 * 14 * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 15 * All rights reserved. 16 * 17 * 2. License 18 * 19 * 2.1. This is your license from Intel Corp. under its intellectual property 20 * rights. You may have additional license terms from the party that provided 21 * you this software, covering your right to use that party's intellectual 22 * property rights. 23 * 24 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 25 * copy of the source code appearing in this file ("Covered Code") an 26 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 27 * base code distributed originally by Intel ("Original Intel Code") to copy, 28 * make derivatives, distribute, use and display any portion of the Covered 29 * Code in any form, with the right to sublicense such rights; and 30 * 31 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 32 * license (with the right to sublicense), under only those claims of Intel 33 * patents that are infringed by the Original Intel Code, to make, use, sell, 34 * offer to sell, and import the Covered Code and derivative works thereof 35 * solely to the minimum extent necessary to exercise the above copyright 36 * license, and in no event shall the patent license extend to any additions 37 * to or modifications of the Original Intel Code. No other license or right 38 * is granted directly or by implication, estoppel or otherwise; 39 * 40 * The above copyright and patent license is granted only if the following 41 * conditions are met: 42 * 43 * 3. Conditions 44 * 45 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 46 * Redistribution of source code of any substantial portion of the Covered 47 * Code or modification with rights to further distribute source must include 48 * the above Copyright Notice, the above License, this list of Conditions, 49 * and the following Disclaimer and Export Compliance provision. In addition, 50 * Licensee must cause all Covered Code to which Licensee contributes to 51 * contain a file documenting the changes Licensee made to create that Covered 52 * Code and the date of any change. Licensee must include in that file the 53 * documentation of any changes made by any predecessor Licensee. Licensee 54 * must include a prominent statement that the modification is derived, 55 * directly or indirectly, from Original Intel Code. 56 * 57 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 58 * Redistribution of source code of any substantial portion of the Covered 59 * Code or modification without rights to further distribute source must 60 * include the following Disclaimer and Export Compliance provision in the 61 * documentation and/or other materials provided with distribution. In 62 * addition, Licensee may not authorize further sublicense of source of any 63 * portion of the Covered Code, and must include terms to the effect that the 64 * license from Licensee to its licensee is limited to the intellectual 65 * property embodied in the software Licensee provides to its licensee, and 66 * not to intellectual property embodied in modifications its licensee may 67 * make. 68 * 69 * 3.3. Redistribution of Executable. Redistribution in executable form of any 70 * substantial portion of the Covered Code or modification must reproduce the 71 * above Copyright Notice, and the following Disclaimer and Export Compliance 72 * provision in the documentation and/or other materials provided with the 73 * distribution. 74 * 75 * 3.4. Intel retains all right, title, and interest in and to the Original 76 * Intel Code. 77 * 78 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 79 * Intel shall be used in advertising or otherwise to promote the sale, use or 80 * other dealings in products derived from or relating to the Covered Code 81 * without prior written authorization from Intel. 82 * 83 * 4. Disclaimer and Export Compliance 84 * 85 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 86 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 87 * 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 "acparser.h" 123#include "acdispat.h" 124#include "acinterp.h" 125#include "amlcode.h" 126#include "acnamesp.h" 127#include "actables.h" 128 129 130#define _COMPONENT ACPI_EXECUTER 131 ACPI_MODULE_NAME ("exstoren") 132 133 134/******************************************************************************* 135 * 136 * FUNCTION: AcpiExResolveObject 137 * 138 * PARAMETERS: SourceDescPtr - Pointer to the source object 139 * TargetType - Current type of the target 140 * WalkState - Current walk state 141 * 142 * RETURN: Status, resolved object in SourceDescPtr. 143 * 144 * DESCRIPTION: Resolve an object. If the object is a reference, dereference 145 * it and return the actual object in the SourceDescPtr. 146 * 147 ******************************************************************************/ 148 149ACPI_STATUS 150AcpiExResolveObject ( 151 ACPI_OPERAND_OBJECT **SourceDescPtr, 152 ACPI_OBJECT_TYPE TargetType, 153 ACPI_WALK_STATE *WalkState) 154{ 155 ACPI_OPERAND_OBJECT *SourceDesc = *SourceDescPtr; 156 ACPI_STATUS Status = AE_OK; 157 158 159 ACPI_FUNCTION_TRACE ("ExResolveObject"); 160 161 162 /* 163 * Ensure we have a Target that can be stored to 164 */ 165 switch (TargetType) 166 { 167 case ACPI_TYPE_BUFFER_FIELD: 168 case INTERNAL_TYPE_REGION_FIELD: 169 case INTERNAL_TYPE_BANK_FIELD: 170 case INTERNAL_TYPE_INDEX_FIELD: 171 /* 172 * These cases all require only Integers or values that 173 * can be converted to Integers (Strings or Buffers) 174 */ 175 176 case ACPI_TYPE_INTEGER: 177 case ACPI_TYPE_STRING: 178 case ACPI_TYPE_BUFFER: 179 180 /* 181 * Stores into a Field/Region or into a Integer/Buffer/String 182 * are all essentially the same. This case handles the 183 * "interchangeable" types Integer, String, and Buffer. 184 */ 185 if (SourceDesc->Common.Type == INTERNAL_TYPE_REFERENCE) 186 { 187 /* Resolve a reference object first */ 188 189 Status = AcpiExResolveToValue (SourceDescPtr, WalkState); 190 if (ACPI_FAILURE (Status)) 191 { 192 break; 193 } 194 } 195 196 /* 197 * Must have a Integer, Buffer, or String 198 */ 199 if ((SourceDesc->Common.Type != ACPI_TYPE_INTEGER) && 200 (SourceDesc->Common.Type != ACPI_TYPE_BUFFER) && 201 (SourceDesc->Common.Type != ACPI_TYPE_STRING)) 202 { 203 /* 204 * Conversion successful but still not a valid type 205 */ 206 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 207 "Cannot assign type %s to %s (must be type Int/Str/Buf)\n", 208 AcpiUtGetTypeName (SourceDesc->Common.Type), 209 AcpiUtGetTypeName (TargetType))); 210 Status = AE_AML_OPERAND_TYPE; 211 } 212 break; 213 214 215 case INTERNAL_TYPE_ALIAS: 216 217 /* 218 * Aliases are resolved by AcpiExPrepOperands 219 */ 220 ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Store into Alias - should never happen\n")); 221 Status = AE_AML_INTERNAL; 222 break; 223 224 225 case ACPI_TYPE_PACKAGE: 226 default: 227 228 /* 229 * All other types than Alias and the various Fields come here, 230 * including the untyped case - ACPI_TYPE_ANY. 231 */ 232 break; 233 } 234 235 return_ACPI_STATUS (Status); 236} 237 238 239/******************************************************************************* 240 * 241 * FUNCTION: AcpiExStoreObjectToObject 242 * 243 * PARAMETERS: SourceDesc - Object to store 244 * DestDesc - Object to recieve a copy of the source 245 * NewDesc - New object if DestDesc is obsoleted 246 * WalkState - Current walk state 247 * 248 * RETURN: Status 249 * 250 * DESCRIPTION: "Store" an object to another object. This may include 251 * converting the source type to the target type (implicit 252 * conversion), and a copy of the value of the source to 253 * the target. 254 * 255 * The Assignment of an object to another (not named) object 256 * is handled here. 257 * The Source passed in will replace the current value (if any) 258 * with the input value. 259 * 260 * When storing into an object the data is converted to the 261 * target object type then stored in the object. This means 262 * that the target object type (for an initialized target) will 263 * not be changed by a store operation. 264 * 265 * This module allows destination types of Number, String, 266 * Buffer, and Package. 267 * 268 * Assumes parameters are already validated. NOTE: SourceDesc 269 * resolution (from a reference object) must be performed by 270 * the caller if necessary. 271 * 272 ******************************************************************************/ 273 274ACPI_STATUS 275AcpiExStoreObjectToObject ( 276 ACPI_OPERAND_OBJECT *SourceDesc, 277 ACPI_OPERAND_OBJECT *DestDesc, 278 ACPI_OPERAND_OBJECT **NewDesc, 279 ACPI_WALK_STATE *WalkState) 280{ 281 ACPI_OPERAND_OBJECT *ActualSrcDesc; 282 ACPI_STATUS Status = AE_OK; 283 284 285 ACPI_FUNCTION_TRACE_PTR ("AcpiExStoreObjectToObject", SourceDesc); 286 287 288 ActualSrcDesc = SourceDesc; 289 if (!DestDesc) 290 { 291 /* 292 * There is no destination object (An uninitialized node or 293 * package element), so we can simply copy the source object 294 * creating a new destination object 295 */ 296 Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, NewDesc, WalkState); 297 return_ACPI_STATUS (Status); 298 } 299 300 if (SourceDesc->Common.Type != DestDesc->Common.Type) 301 { 302 /* 303 * The source type does not match the type of the destination. 304 * Perform the "implicit conversion" of the source to the current type 305 * of the target as per the ACPI specification. 306 * 307 * If no conversion performed, ActualSrcDesc = SourceDesc. 308 * Otherwise, ActualSrcDesc is a temporary object to hold the 309 * converted object. 310 */ 311 Status = AcpiExConvertToTargetType (DestDesc->Common.Type, SourceDesc, 312 &ActualSrcDesc, WalkState); 313 if (ACPI_FAILURE (Status)) 314 { 315 return_ACPI_STATUS (Status); 316 } 317 } 318 319 /* 320 * We now have two objects of identical types, and we can perform a 321 * copy of the *value* of the source object. 322 */ 323 switch (DestDesc->Common.Type) 324 { 325 case ACPI_TYPE_INTEGER: 326 327 DestDesc->Integer.Value = ActualSrcDesc->Integer.Value; 328 329 /* Truncate value if we are executing from a 32-bit ACPI table */ 330 331 AcpiExTruncateFor32bitTable (DestDesc, WalkState); 332 break; 333 334 case ACPI_TYPE_STRING: 335 336 Status = AcpiExStoreStringToString (ActualSrcDesc, DestDesc); 337 break; 338 339 case ACPI_TYPE_BUFFER: 340 341 Status = AcpiExStoreBufferToBuffer (ActualSrcDesc, DestDesc); 342 break; 343 344 case ACPI_TYPE_PACKAGE: 345 346 Status = AcpiUtCopyIobjectToIobject (ActualSrcDesc, &DestDesc, WalkState); 347 break; 348 349 default: 350 /* 351 * All other types come here. 352 */ 353 ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Store into type %s not implemented\n", 354 AcpiUtGetTypeName (DestDesc->Common.Type))); 355 356 Status = AE_NOT_IMPLEMENTED; 357 break; 358 } 359 360 if (ActualSrcDesc != SourceDesc) 361 { 362 /* Delete the intermediate (temporary) source object */ 363 364 AcpiUtRemoveReference (ActualSrcDesc); 365 } 366 367 *NewDesc = DestDesc; 368 return_ACPI_STATUS (Status); 369} 370 371 372