exresolv.c revision 91116
1 2/****************************************************************************** 3 * 4 * Module Name: exresolv - AML Interpreter object resolution 5 * $Revision: 106 $ 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 __EXRESOLV_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 ("exresolv") 132 133 134/******************************************************************************* 135 * 136 * FUNCTION: AcpiExResolveToValue 137 * 138 * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can 139 * be either an (ACPI_OPERAND_OBJECT *) 140 * or an ACPI_HANDLE. 141 * WalkState - Current method state 142 * 143 * RETURN: Status 144 * 145 * DESCRIPTION: Convert Reference objects to values 146 * 147 ******************************************************************************/ 148 149ACPI_STATUS 150AcpiExResolveToValue ( 151 ACPI_OPERAND_OBJECT **StackPtr, 152 ACPI_WALK_STATE *WalkState) 153{ 154 ACPI_STATUS Status; 155 156 157 ACPI_FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr); 158 159 160 if (!StackPtr || !*StackPtr) 161 { 162 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n")); 163 return_ACPI_STATUS (AE_AML_NO_OPERAND); 164 } 165 166 /* 167 * The entity pointed to by the StackPtr can be either 168 * 1) A valid ACPI_OPERAND_OBJECT, or 169 * 2) A ACPI_NAMESPACE_NODE (NamedObj) 170 */ 171 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_INTERNAL) 172 { 173 Status = AcpiExResolveObjectToValue (StackPtr, WalkState); 174 if (ACPI_FAILURE (Status)) 175 { 176 return_ACPI_STATUS (Status); 177 } 178 } 179 180 /* 181 * Object on the stack may have changed if AcpiExResolveObjectToValue() 182 * was called (i.e., we can't use an _else_ here.) 183 */ 184 if (ACPI_GET_DESCRIPTOR_TYPE (*StackPtr) == ACPI_DESC_TYPE_NAMED) 185 { 186 Status = AcpiExResolveNodeToValue ((ACPI_NAMESPACE_NODE **) StackPtr, 187 WalkState); 188 if (ACPI_FAILURE (Status)) 189 { 190 return_ACPI_STATUS (Status); 191 } 192 } 193 194 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Resolved object %p\n", *StackPtr)); 195 return_ACPI_STATUS (AE_OK); 196} 197 198 199/******************************************************************************* 200 * 201 * FUNCTION: AcpiExResolveObjectToValue 202 * 203 * PARAMETERS: StackPtr - Pointer to a stack location that contains a 204 * ptr to an internal object. 205 * WalkState - Current method state 206 * 207 * RETURN: Status 208 * 209 * DESCRIPTION: Retrieve the value from an internal object. The Reference type 210 * uses the associated AML opcode to determine the value. 211 * 212 ******************************************************************************/ 213 214ACPI_STATUS 215AcpiExResolveObjectToValue ( 216 ACPI_OPERAND_OBJECT **StackPtr, 217 ACPI_WALK_STATE *WalkState) 218{ 219 ACPI_STATUS Status = AE_OK; 220 ACPI_OPERAND_OBJECT *StackDesc; 221 void *TempNode; 222 ACPI_OPERAND_OBJECT *ObjDesc; 223 UINT16 Opcode; 224 225 226 ACPI_FUNCTION_TRACE ("ExResolveObjectToValue"); 227 228 229 StackDesc = *StackPtr; 230 231 /* This is an ACPI_OPERAND_OBJECT */ 232 233 switch (StackDesc->Common.Type) 234 { 235 case INTERNAL_TYPE_REFERENCE: 236 237 Opcode = StackDesc->Reference.Opcode; 238 239 switch (Opcode) 240 { 241 case AML_NAME_OP: 242 243 /* 244 * Convert indirect name ptr to a direct name ptr. 245 * Then, AcpiExResolveNodeToValue can be used to get the value 246 */ 247 TempNode = StackDesc->Reference.Object; 248 249 /* Delete the Reference Object */ 250 251 AcpiUtRemoveReference (StackDesc); 252 253 /* Put direct name pointer onto stack and exit */ 254 255 (*StackPtr) = TempNode; 256 break; 257 258 259 case AML_LOCAL_OP: 260 case AML_ARG_OP: 261 262 /* 263 * Get the local from the method's state info 264 * Note: this increments the local's object reference count 265 */ 266 Status = AcpiDsMethodDataGetValue (Opcode, 267 StackDesc->Reference.Offset, WalkState, &ObjDesc); 268 if (ACPI_FAILURE (Status)) 269 { 270 return_ACPI_STATUS (Status); 271 } 272 273 /* 274 * Now we can delete the original Reference Object and 275 * replace it with the resolve value 276 */ 277 AcpiUtRemoveReference (StackDesc); 278 *StackPtr = ObjDesc; 279 280 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "[Arg/Local %d] ValueObj is %p\n", 281 StackDesc->Reference.Offset, ObjDesc)); 282 break; 283 284 /* 285 * For constants, we must change the reference/constant object 286 * to a real integer object 287 */ 288 case AML_ZERO_OP: 289 case AML_ONE_OP: 290 case AML_ONES_OP: 291 case AML_REVISION_OP: 292 293 /* Create a new integer object */ 294 295 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 296 if (!ObjDesc) 297 { 298 return_ACPI_STATUS (AE_NO_MEMORY); 299 } 300 301 switch (Opcode) 302 { 303 case AML_ZERO_OP: 304 ObjDesc->Integer.Value = 0; 305 break; 306 307 case AML_ONE_OP: 308 ObjDesc->Integer.Value = 1; 309 break; 310 311 case AML_ONES_OP: 312 ObjDesc->Integer.Value = ACPI_INTEGER_MAX; 313 314 /* Truncate value if we are executing from a 32-bit ACPI table */ 315 316 AcpiExTruncateFor32bitTable (ObjDesc, WalkState); 317 break; 318 319 case AML_REVISION_OP: 320 ObjDesc->Integer.Value = ACPI_CA_SUPPORT_LEVEL; 321 break; 322 } 323 324 /* 325 * Remove a reference from the original reference object 326 * and put the new object in its place 327 */ 328 AcpiUtRemoveReference (StackDesc); 329 *StackPtr = ObjDesc; 330 break; 331 332 333 case AML_INDEX_OP: 334 335 switch (StackDesc->Reference.TargetType) 336 { 337 case ACPI_TYPE_BUFFER_FIELD: 338 339 /* Just return - leave the Reference on the stack */ 340 break; 341 342 343 case ACPI_TYPE_PACKAGE: 344 ObjDesc = *StackDesc->Reference.Where; 345 if (ObjDesc) 346 { 347 /* 348 * Valid obj descriptor, copy pointer to return value 349 * (i.e., dereference the package index) 350 * Delete the ref object, increment the returned object 351 */ 352 AcpiUtRemoveReference (StackDesc); 353 AcpiUtAddReference (ObjDesc); 354 *StackPtr = ObjDesc; 355 } 356 else 357 { 358 /* 359 * A NULL object descriptor means an unitialized element of 360 * the package, can't dereference it 361 */ 362 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 363 "Attempt to deref an Index to NULL pkg element Idx=%p\n", 364 StackDesc)); 365 Status = AE_AML_UNINITIALIZED_ELEMENT; 366 } 367 break; 368 369 default: 370 /* Invalid reference object */ 371 372 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 373 "Unknown TargetType %X in Index/Reference obj %p\n", 374 StackDesc->Reference.TargetType, StackDesc)); 375 Status = AE_AML_INTERNAL; 376 break; 377 } 378 break; 379 380 381 case AML_DEBUG_OP: 382 383 /* Just leave the object as-is */ 384 break; 385 386 387 default: 388 389 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Reference object subtype %02X in %p\n", 390 Opcode, StackDesc)); 391 Status = AE_AML_INTERNAL; 392 break; 393 394 } /* switch (Opcode) */ 395 396 break; /* case INTERNAL_TYPE_REFERENCE */ 397 398 /* 399 * These cases may never happen here, but just in case.. 400 */ 401 case ACPI_TYPE_BUFFER_FIELD: 402 case INTERNAL_TYPE_REGION_FIELD: 403 case INTERNAL_TYPE_BANK_FIELD: 404 case INTERNAL_TYPE_INDEX_FIELD: 405 406 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n", 407 StackDesc, StackDesc->Common.Type)); 408 409 Status = AcpiExReadDataFromField (StackDesc, &ObjDesc); 410 *StackPtr = (void *) ObjDesc; 411 break; 412 413 default: 414 break; 415 } 416 417 return_ACPI_STATUS (Status); 418} 419 420 421