exresnte.c revision 85756
1 2/****************************************************************************** 3 * 4 * Module Name: exresnte - AML Interpreter object resolution 5 * $Revision: 43 $ 6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 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 recieve 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_TYPE8 EntryType; 171 ACPI_INTEGER TempVal; 172 173 174 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 /* 190 * Several object types require no further processing: 191 * 1) Devices rarely have an attached object, return the Node 192 * 2) Method locals and arguments have a pseudo-Node 193 */ 194 if (EntryType == ACPI_TYPE_DEVICE || 195 (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) 196 { 197 return_ACPI_STATUS (AE_OK); 198 } 199 200 if (!SourceDesc) 201 { 202 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n", 203 Node)); 204 return_ACPI_STATUS (AE_AML_NO_OPERAND); 205 } 206 207 /* 208 * Action is based on the type of the Node, which indicates the type 209 * of the attached object or pointer 210 */ 211 switch (EntryType) 212 { 213 214 case ACPI_TYPE_PACKAGE: 215 216 if (ACPI_TYPE_PACKAGE != SourceDesc->Common.Type) 217 { 218 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Package, type %s\n", 219 AcpiUtGetTypeName (SourceDesc->Common.Type))); 220 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 221 } 222 223 /* Return an additional reference to the object */ 224 225 ObjDesc = SourceDesc; 226 AcpiUtAddReference (ObjDesc); 227 break; 228 229 230 case ACPI_TYPE_BUFFER: 231 232 if (ACPI_TYPE_BUFFER != SourceDesc->Common.Type) 233 { 234 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Buffer, type %s\n", 235 AcpiUtGetTypeName (SourceDesc->Common.Type))); 236 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 237 } 238 239 /* Return an additional reference to the object */ 240 241 ObjDesc = SourceDesc; 242 AcpiUtAddReference (ObjDesc); 243 break; 244 245 246 case ACPI_TYPE_STRING: 247 248 if (ACPI_TYPE_STRING != SourceDesc->Common.Type) 249 { 250 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a String, type %s\n", 251 AcpiUtGetTypeName (SourceDesc->Common.Type))); 252 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 253 } 254 255 /* Return an additional reference to the object */ 256 257 ObjDesc = SourceDesc; 258 AcpiUtAddReference (ObjDesc); 259 break; 260 261 262 case ACPI_TYPE_INTEGER: 263 264 if (ACPI_TYPE_INTEGER != SourceDesc->Common.Type) 265 { 266 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Integer, type %s\n", 267 AcpiUtGetTypeName (SourceDesc->Common.Type))); 268 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 269 } 270 271 /* Return an additional reference to the object */ 272 273 ObjDesc = SourceDesc; 274 AcpiUtAddReference (ObjDesc); 275 break; 276 277 278 case ACPI_TYPE_BUFFER_FIELD: 279 case INTERNAL_TYPE_REGION_FIELD: 280 case INTERNAL_TYPE_BANK_FIELD: 281 case INTERNAL_TYPE_INDEX_FIELD: 282 283 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead Node=%p SourceDesc=%p Type=%X\n", 284 Node, SourceDesc, EntryType)); 285 286 Status = AcpiExReadDataFromField (SourceDesc, &ObjDesc); 287 break; 288 289 290 /* 291 * For these objects, just return the object attached to the Node 292 */ 293 case ACPI_TYPE_MUTEX: 294 case ACPI_TYPE_METHOD: 295 case ACPI_TYPE_POWER: 296 case ACPI_TYPE_PROCESSOR: 297 case ACPI_TYPE_THERMAL: 298 case ACPI_TYPE_EVENT: 299 case ACPI_TYPE_REGION: 300 301 /* Return an additional reference to the object */ 302 303 ObjDesc = SourceDesc; 304 AcpiUtAddReference (ObjDesc); 305 break; 306 307 308 /* TYPE_Any is untyped, and thus there is no object associated with it */ 309 310 case ACPI_TYPE_ANY: 311 312 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Untyped entry %p, no attached object!\n", 313 Node)); 314 315 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ 316 break; 317 318 319 /* 320 * The only named references allowed are named constants 321 * e.g. -- Name (\OSFL, Ones) 322 */ 323 case INTERNAL_TYPE_REFERENCE: 324 325 switch (SourceDesc->Reference.Opcode) 326 { 327 328 case AML_ZERO_OP: 329 330 TempVal = 0; 331 break; 332 333 case AML_ONE_OP: 334 335 TempVal = 1; 336 break; 337 338 case AML_ONES_OP: 339 340 TempVal = ACPI_INTEGER_MAX; 341 break; 342 343 case AML_REVISION_OP: 344 345 TempVal = ACPI_CA_SUPPORT_LEVEL; 346 break; 347 348 default: 349 350 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported reference opcode %X\n", 351 SourceDesc->Reference.Opcode)); 352 353 return_ACPI_STATUS (AE_AML_BAD_OPCODE); 354 } 355 356 /* Create object for result */ 357 358 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 359 if (!ObjDesc) 360 { 361 return_ACPI_STATUS (AE_NO_MEMORY); 362 } 363 364 ObjDesc->Integer.Value = TempVal; 365 366 /* 367 * Truncate value if we are executing from a 32-bit ACPI table 368 * AND actually executing AML code. If we are resolving 369 * an object in the namespace via an external call to the 370 * subsystem, we will have a null WalkState 371 */ 372 if (WalkState) 373 { 374 AcpiExTruncateFor32bitTable (ObjDesc, WalkState); 375 } 376 break; 377 378 379 /* Default case is for unknown types */ 380 381 default: 382 383 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Node %p - Unknown object type %X\n", 384 Node, EntryType)); 385 386 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 387 388 } /* switch (EntryType) */ 389 390 391 /* Put the object descriptor on the stack */ 392 393 *ObjectPtr = (void *) ObjDesc; 394 return_ACPI_STATUS (Status); 395} 396 397 398