exresnte.c revision 92388
1 2/****************************************************************************** 3 * 4 * Module Name: exresnte - AML Interpreter object resolution 5 * $Revision: 50 $ 6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp. 14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#define __EXRESNTE_C__ 119 120#include "acpi.h" 121#include "amlcode.h" 122#include "acparser.h" 123#include "acdispat.h" 124#include "acinterp.h" 125#include "acnamesp.h" 126#include "actables.h" 127#include "acevents.h" 128 129 130#define _COMPONENT ACPI_EXECUTER 131 ACPI_MODULE_NAME ("exresnte") 132 133 134/******************************************************************************* 135 * 136 * FUNCTION: AcpiExResolveNodeToValue 137 * 138 * PARAMETERS: ObjectPtr - Pointer to a location that contains 139 * a pointer to a NS node, and will receive a 140 * pointer to the resolved object. 141 * WalkState - Current state. Valid only if executing AML 142 * code. NULL if simply resolving an object 143 * 144 * RETURN: Status 145 * 146 * DESCRIPTION: Resolve a Namespace node to a valued object 147 * 148 * Note: for some of the data types, the pointer attached to the Node 149 * can be either a pointer to an actual internal object or a pointer into the 150 * AML stream itself. These types are currently: 151 * 152 * ACPI_TYPE_INTEGER 153 * ACPI_TYPE_STRING 154 * ACPI_TYPE_BUFFER 155 * ACPI_TYPE_MUTEX 156 * ACPI_TYPE_PACKAGE 157 * 158 ******************************************************************************/ 159 160ACPI_STATUS 161AcpiExResolveNodeToValue ( 162 ACPI_NAMESPACE_NODE **ObjectPtr, 163 ACPI_WALK_STATE *WalkState) 164 165{ 166 ACPI_STATUS Status = AE_OK; 167 ACPI_OPERAND_OBJECT *SourceDesc; 168 ACPI_OPERAND_OBJECT *ObjDesc = NULL; 169 ACPI_NAMESPACE_NODE *Node; 170 ACPI_OBJECT_TYPE EntryType; 171 ACPI_INTEGER TempVal; 172 173 174 ACPI_FUNCTION_TRACE ("ExResolveNodeToValue"); 175 176 177 /* 178 * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the 179 * object that is attached to the Node. 180 */ 181 Node = *ObjectPtr; 182 SourceDesc = AcpiNsGetAttachedObject (Node); 183 EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); 184 185 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p Type=%X\n", 186 Node, SourceDesc, EntryType)); 187 188 /* 189 * Several object types require no further processing: 190 * 1) Devices rarely have an attached object, return the Node 191 * 2) Method locals and arguments have a pseudo-Node 192 */ 193 if (EntryType == ACPI_TYPE_DEVICE || 194 (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) 195 { 196 return_ACPI_STATUS (AE_OK); 197 } 198 199 if (!SourceDesc) 200 { 201 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n", 202 Node)); 203 return_ACPI_STATUS (AE_AML_NO_OPERAND); 204 } 205 206 /* 207 * Action is based on the type of the Node, which indicates the type 208 * of the attached object or pointer 209 */ 210 switch (EntryType) 211 { 212 case ACPI_TYPE_PACKAGE: 213 214 if (ACPI_TYPE_PACKAGE != SourceDesc->Common.Type) 215 { 216 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Package, type %s\n", 217 AcpiUtGetTypeName (SourceDesc->Common.Type))); 218 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 219 } 220 221 /* Return an additional reference to the object */ 222 223 ObjDesc = SourceDesc; 224 AcpiUtAddReference (ObjDesc); 225 break; 226 227 228 case ACPI_TYPE_BUFFER: 229 230 if (ACPI_TYPE_BUFFER != SourceDesc->Common.Type) 231 { 232 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Buffer, type %s\n", 233 AcpiUtGetTypeName (SourceDesc->Common.Type))); 234 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 235 } 236 237 /* Return an additional reference to the object */ 238 239 ObjDesc = SourceDesc; 240 AcpiUtAddReference (ObjDesc); 241 break; 242 243 244 case ACPI_TYPE_STRING: 245 246 if (ACPI_TYPE_STRING != SourceDesc->Common.Type) 247 { 248 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a String, type %s\n", 249 AcpiUtGetTypeName (SourceDesc->Common.Type))); 250 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 251 } 252 253 /* Return an additional reference to the object */ 254 255 ObjDesc = SourceDesc; 256 AcpiUtAddReference (ObjDesc); 257 break; 258 259 260 case ACPI_TYPE_INTEGER: 261 262 if (ACPI_TYPE_INTEGER != SourceDesc->Common.Type) 263 { 264 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Integer, type %s\n", 265 AcpiUtGetTypeName (SourceDesc->Common.Type))); 266 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 267 } 268 269 /* Return an additional reference to the object */ 270 271 ObjDesc = SourceDesc; 272 AcpiUtAddReference (ObjDesc); 273 break; 274 275 276 case ACPI_TYPE_BUFFER_FIELD: 277 case INTERNAL_TYPE_REGION_FIELD: 278 case INTERNAL_TYPE_BANK_FIELD: 279 case INTERNAL_TYPE_INDEX_FIELD: 280 281 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead Node=%p SourceDesc=%p Type=%X\n", 282 Node, SourceDesc, EntryType)); 283 284 Status = AcpiExReadDataFromField (SourceDesc, &ObjDesc); 285 break; 286 287 /* 288 * For these objects, just return the object attached to the Node 289 */ 290 case ACPI_TYPE_MUTEX: 291 case ACPI_TYPE_METHOD: 292 case ACPI_TYPE_POWER: 293 case ACPI_TYPE_PROCESSOR: 294 case ACPI_TYPE_THERMAL: 295 case ACPI_TYPE_EVENT: 296 case ACPI_TYPE_REGION: 297 298 /* Return an additional reference to the object */ 299 300 ObjDesc = SourceDesc; 301 AcpiUtAddReference (ObjDesc); 302 break; 303 304 305 /* TYPE_Any is untyped, and thus there is no object associated with it */ 306 307 case ACPI_TYPE_ANY: 308 309 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Untyped entry %p, no attached object!\n", 310 Node)); 311 312 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ 313 314 315 /* 316 * The only named references allowed are named constants 317 * e.g. -- Name (\OSFL, Ones) 318 */ 319 case INTERNAL_TYPE_REFERENCE: 320 321 switch (SourceDesc->Reference.Opcode) 322 { 323 324 case AML_ZERO_OP: 325 326 TempVal = 0; 327 break; 328 329 case AML_ONE_OP: 330 331 TempVal = 1; 332 break; 333 334 case AML_ONES_OP: 335 336 TempVal = ACPI_INTEGER_MAX; 337 break; 338 339 case AML_REVISION_OP: 340 341 TempVal = ACPI_CA_SUPPORT_LEVEL; 342 break; 343 344 default: 345 346 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported reference opcode %X\n", 347 SourceDesc->Reference.Opcode)); 348 349 return_ACPI_STATUS (AE_AML_BAD_OPCODE); 350 } 351 352 /* Create object for result */ 353 354 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 355 if (!ObjDesc) 356 { 357 return_ACPI_STATUS (AE_NO_MEMORY); 358 } 359 360 ObjDesc->Integer.Value = TempVal; 361 362 /* 363 * Truncate value if we are executing from a 32-bit ACPI table 364 * AND actually executing AML code. If we are resolving 365 * an object in the namespace via an external call to the 366 * subsystem, we will have a null WalkState 367 */ 368 if (WalkState) 369 { 370 AcpiExTruncateFor32bitTable (ObjDesc, WalkState); 371 } 372 break; 373 374 375 /* Default case is for unknown types */ 376 377 default: 378 379 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Node %p - Unknown object type %X\n", 380 Node, EntryType)); 381 382 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 383 384 } /* switch (EntryType) */ 385 386 387 /* Put the object descriptor on the stack */ 388 389 *ObjectPtr = (void *) ObjDesc; 390 return_ACPI_STATUS (Status); 391} 392 393 394