exresolv.c revision 87031
1 2/****************************************************************************** 3 * 4 * Module Name: exresolv - AML Interpreter object resolution 5 * $Revision: 103 $ 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 __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 MODULE_NAME ("exresolv") 132 133 134 135/******************************************************************************* 136 * 137 * FUNCTION: AcpiExResolveToValue 138 * 139 * PARAMETERS: **StackPtr - Points to entry on ObjStack, which can 140 * be either an (ACPI_OPERAND_OBJECT *) 141 * or an ACPI_HANDLE. 142 * WalkState - Current method state 143 * 144 * RETURN: Status 145 * 146 * DESCRIPTION: Convert Reference objects to values 147 * 148 ******************************************************************************/ 149 150ACPI_STATUS 151AcpiExResolveToValue ( 152 ACPI_OPERAND_OBJECT **StackPtr, 153 ACPI_WALK_STATE *WalkState) 154{ 155 ACPI_STATUS Status; 156 157 158 FUNCTION_TRACE_PTR ("ExResolveToValue", StackPtr); 159 160 161 if (!StackPtr || !*StackPtr) 162 { 163 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n")); 164 return_ACPI_STATUS (AE_AML_NO_OPERAND); 165 } 166 167 /* 168 * The entity pointed to by the StackPtr can be either 169 * 1) A valid ACPI_OPERAND_OBJECT, or 170 * 2) A ACPI_NAMESPACE_NODE (NamedObj) 171 */ 172 if (VALID_DESCRIPTOR_TYPE (*StackPtr, ACPI_DESC_TYPE_INTERNAL)) 173 { 174 Status = AcpiExResolveObjectToValue (StackPtr, WalkState); 175 if (ACPI_FAILURE (Status)) 176 { 177 return_ACPI_STATUS (Status); 178 } 179 } 180 181 /* 182 * Object on the stack may have changed if AcpiExResolveObjectToValue() 183 * was called (i.e., we can't use an _else_ here.) 184 */ 185 if (VALID_DESCRIPTOR_TYPE (*StackPtr, ACPI_DESC_TYPE_NAMED)) 186 { 187 Status = AcpiExResolveNodeToValue ((ACPI_NAMESPACE_NODE **) StackPtr, 188 WalkState); 189 if (ACPI_FAILURE (Status)) 190 { 191 return_ACPI_STATUS (Status); 192 } 193 } 194 195 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Resolved object %p\n", *StackPtr)); 196 return_ACPI_STATUS (AE_OK); 197} 198 199 200/******************************************************************************* 201 * 202 * FUNCTION: AcpiExResolveObjectToValue 203 * 204 * PARAMETERS: StackPtr - Pointer to a stack location that contains a 205 * ptr to an internal object. 206 * WalkState - Current method state 207 * 208 * RETURN: Status 209 * 210 * DESCRIPTION: Retrieve the value from an internal object. The Reference type 211 * uses the associated AML opcode to determine the value. 212 * 213 ******************************************************************************/ 214 215ACPI_STATUS 216AcpiExResolveObjectToValue ( 217 ACPI_OPERAND_OBJECT **StackPtr, 218 ACPI_WALK_STATE *WalkState) 219{ 220 ACPI_STATUS Status = AE_OK; 221 ACPI_OPERAND_OBJECT *StackDesc; 222 void *TempNode; 223 ACPI_OPERAND_OBJECT *ObjDesc; 224 UINT16 Opcode; 225 226 227 FUNCTION_TRACE ("ExResolveObjectToValue"); 228 229 230 StackDesc = *StackPtr; 231 232 /* This is an ACPI_OPERAND_OBJECT */ 233 234 switch (StackDesc->Common.Type) 235 { 236 case INTERNAL_TYPE_REFERENCE: 237 238 Opcode = StackDesc->Reference.Opcode; 239 240 switch (Opcode) 241 { 242 case AML_NAME_OP: 243 244 /* 245 * Convert indirect name ptr to a direct name ptr. 246 * Then, AcpiExResolveNodeToValue can be used to get the value 247 */ 248 TempNode = StackDesc->Reference.Object; 249 250 /* Delete the Reference Object */ 251 252 AcpiUtRemoveReference (StackDesc); 253 254 /* Put direct name pointer onto stack and exit */ 255 256 (*StackPtr) = TempNode; 257 break; 258 259 260 case AML_LOCAL_OP: 261 case AML_ARG_OP: 262 263 /* 264 * Get the local from the method's state info 265 * Note: this increments the local's object reference count 266 */ 267 Status = AcpiDsMethodDataGetValue (Opcode, 268 StackDesc->Reference.Offset, WalkState, &ObjDesc); 269 if (ACPI_FAILURE (Status)) 270 { 271 return_ACPI_STATUS (Status); 272 } 273 274 /* 275 * Now we can delete the original Reference Object and 276 * replace it with the resolve value 277 */ 278 AcpiUtRemoveReference (StackDesc); 279 *StackPtr = ObjDesc; 280 281 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "[Arg/Local %d] ValueObj is %p\n", 282 StackDesc->Reference.Offset, ObjDesc)); 283 break; 284 285 /* 286 * For constants, we must change the reference/constant object 287 * to a real integer object 288 */ 289 case AML_ZERO_OP: 290 case AML_ONE_OP: 291 case AML_ONES_OP: 292 case AML_REVISION_OP: 293 294 /* Create a new integer object */ 295 296 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 297 if (!ObjDesc) 298 { 299 return_ACPI_STATUS (AE_NO_MEMORY); 300 } 301 302 switch (Opcode) 303 { 304 case AML_ZERO_OP: 305 ObjDesc->Integer.Value = 0; 306 break; 307 308 case AML_ONE_OP: 309 ObjDesc->Integer.Value = 1; 310 break; 311 312 case AML_ONES_OP: 313 ObjDesc->Integer.Value = ACPI_INTEGER_MAX; 314 315 /* Truncate value if we are executing from a 32-bit ACPI table */ 316 317 AcpiExTruncateFor32bitTable (ObjDesc, WalkState); 318 break; 319 320 case AML_REVISION_OP: 321 ObjDesc->Integer.Value = ACPI_CA_SUPPORT_LEVEL; 322 break; 323 } 324 325 /* 326 * Remove a reference from the original reference object 327 * and put the new object in its place 328 */ 329 AcpiUtRemoveReference (StackDesc); 330 *StackPtr = ObjDesc; 331 break; 332 333 334 case AML_INDEX_OP: 335 336 switch (StackDesc->Reference.TargetType) 337 { 338 case ACPI_TYPE_BUFFER_FIELD: 339 340 /* Just return - leave the Reference on the stack */ 341 break; 342 343 344 case ACPI_TYPE_PACKAGE: 345 ObjDesc = *StackDesc->Reference.Where; 346 if (ObjDesc) 347 { 348 /* 349 * Valid obj descriptor, copy pointer to return value 350 * (i.e., dereference the package index) 351 * Delete the ref object, increment the returned object 352 */ 353 AcpiUtRemoveReference (StackDesc); 354 AcpiUtAddReference (ObjDesc); 355 *StackPtr = ObjDesc; 356 } 357 else 358 { 359 /* 360 * A NULL object descriptor means an unitialized element of 361 * the package, can't dereference it 362 */ 363 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 364 "Attempt to deref an Index to NULL pkg element Idx=%p\n", 365 StackDesc)); 366 Status = AE_AML_UNINITIALIZED_ELEMENT; 367 } 368 break; 369 370 default: 371 /* Invalid reference object */ 372 373 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 374 "Unknown TargetType %X in Index/Reference obj %p\n", 375 StackDesc->Reference.TargetType, StackDesc)); 376 Status = AE_AML_INTERNAL; 377 break; 378 } 379 break; 380 381 382 case AML_DEBUG_OP: 383 384 /* Just leave the object as-is */ 385 break; 386 387 388 default: 389 390 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Reference object subtype %02X in %p\n", 391 Opcode, StackDesc)); 392 Status = AE_AML_INTERNAL; 393 break; 394 395 } /* switch (Opcode) */ 396 397 break; /* case INTERNAL_TYPE_REFERENCE */ 398 399 /* 400 * These cases may never happen here, but just in case.. 401 */ 402 case ACPI_TYPE_BUFFER_FIELD: 403 case INTERNAL_TYPE_REGION_FIELD: 404 case INTERNAL_TYPE_BANK_FIELD: 405 case INTERNAL_TYPE_INDEX_FIELD: 406 407 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "FieldRead SourceDesc=%p Type=%X\n", 408 StackDesc, StackDesc->Common.Type)); 409 410 Status = AcpiExReadDataFromField (StackDesc, &ObjDesc); 411 *StackPtr = (void *) ObjDesc; 412 break; 413 414 default: 415 break; 416 } 417 418 return_ACPI_STATUS (Status); 419} 420 421 422