exconfig.c revision 131440
1/****************************************************************************** 2 * 3 * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) 4 * $Revision: 78 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 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 __EXCONFIG_C__ 119 120#include "acpi.h" 121#include "acinterp.h" 122#include "amlcode.h" 123#include "acnamesp.h" 124#include "acevents.h" 125#include "actables.h" 126#include "acdispat.h" 127 128 129#define _COMPONENT ACPI_EXECUTER 130 ACPI_MODULE_NAME ("exconfig") 131 132 133/******************************************************************************* 134 * 135 * FUNCTION: AcpiExAddTable 136 * 137 * PARAMETERS: Table - Pointer to raw table 138 * ParentNode - Where to load the table (scope) 139 * DdbHandle - Where to return the table handle. 140 * 141 * RETURN: Status 142 * 143 * DESCRIPTION: Common function to Install and Load an ACPI table with a 144 * returned table handle. 145 * 146 ******************************************************************************/ 147 148ACPI_STATUS 149AcpiExAddTable ( 150 ACPI_TABLE_HEADER *Table, 151 ACPI_NAMESPACE_NODE *ParentNode, 152 ACPI_OPERAND_OBJECT **DdbHandle) 153{ 154 ACPI_STATUS Status; 155 ACPI_TABLE_DESC TableInfo; 156 ACPI_OPERAND_OBJECT *ObjDesc; 157 158 159 ACPI_FUNCTION_TRACE ("ExAddTable"); 160 161 162 /* Create an object to be the table handle */ 163 164 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE); 165 if (!ObjDesc) 166 { 167 return_ACPI_STATUS (AE_NO_MEMORY); 168 } 169 170 /* Install the new table into the local data structures */ 171 172 ACPI_MEMSET (&TableInfo, 0, sizeof (ACPI_TABLE_DESC)); 173 174 TableInfo.Type = 5; 175 TableInfo.Pointer = Table; 176 TableInfo.Length = (ACPI_SIZE) Table->Length; 177 TableInfo.Allocation = ACPI_MEM_ALLOCATED; 178 179 Status = AcpiTbInstallTable (&TableInfo); 180 if (ACPI_FAILURE (Status)) 181 { 182 goto Cleanup; 183 } 184 185 /* Add the table to the namespace */ 186 187 Status = AcpiNsLoadTable (TableInfo.InstalledDesc, ParentNode); 188 if (ACPI_FAILURE (Status)) 189 { 190 /* Uninstall table on error */ 191 192 (void) AcpiTbUninstallTable (TableInfo.InstalledDesc); 193 goto Cleanup; 194 } 195 196 /* Init the table handle */ 197 198 ObjDesc->Reference.Opcode = AML_LOAD_OP; 199 ObjDesc->Reference.Object = TableInfo.InstalledDesc; 200 *DdbHandle = ObjDesc; 201 return_ACPI_STATUS (AE_OK); 202 203 204Cleanup: 205 AcpiUtRemoveReference (ObjDesc); 206 return_ACPI_STATUS (Status); 207} 208 209 210/******************************************************************************* 211 * 212 * FUNCTION: AcpiExLoadTableOp 213 * 214 * PARAMETERS: WalkState - Current state with operands 215 * ReturnDesc - Where to store the return object 216 * 217 * RETURN: Status 218 * 219 * DESCRIPTION: Load an ACPI table 220 * 221 ******************************************************************************/ 222 223ACPI_STATUS 224AcpiExLoadTableOp ( 225 ACPI_WALK_STATE *WalkState, 226 ACPI_OPERAND_OBJECT **ReturnDesc) 227{ 228 ACPI_STATUS Status; 229 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 230 ACPI_TABLE_HEADER *Table; 231 ACPI_NAMESPACE_NODE *ParentNode; 232 ACPI_NAMESPACE_NODE *StartNode; 233 ACPI_NAMESPACE_NODE *ParameterNode = NULL; 234 ACPI_OPERAND_OBJECT *DdbHandle; 235 236 237 ACPI_FUNCTION_TRACE ("ExLoadTableOp"); 238 239 240#if 0 241 /* 242 * Make sure that the signature does not match one of the tables that 243 * is already loaded. 244 */ 245 Status = AcpiTbMatchSignature (Operand[0]->String.Pointer, NULL); 246 if (Status == AE_OK) 247 { 248 /* Signature matched -- don't allow override */ 249 250 return_ACPI_STATUS (AE_ALREADY_EXISTS); 251 } 252#endif 253 254 /* Find the ACPI table */ 255 256 Status = AcpiTbFindTable (Operand[0]->String.Pointer, 257 Operand[1]->String.Pointer, 258 Operand[2]->String.Pointer, &Table); 259 if (ACPI_FAILURE (Status)) 260 { 261 if (Status != AE_NOT_FOUND) 262 { 263 return_ACPI_STATUS (Status); 264 } 265 266 /* Table not found, return an Integer=0 and AE_OK */ 267 268 DdbHandle = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 269 if (!DdbHandle) 270 { 271 return_ACPI_STATUS (AE_NO_MEMORY); 272 } 273 274 DdbHandle->Integer.Value = 0; 275 *ReturnDesc = DdbHandle; 276 277 return_ACPI_STATUS (AE_OK); 278 } 279 280 /* Default nodes */ 281 282 StartNode = WalkState->ScopeInfo->Scope.Node; 283 ParentNode = AcpiGbl_RootNode; 284 285 /* RootPath (optional parameter) */ 286 287 if (Operand[3]->String.Length > 0) 288 { 289 /* 290 * Find the node referenced by the RootPathString. This is the 291 * location within the namespace where the table will be loaded. 292 */ 293 Status = AcpiNsGetNodeByPath (Operand[3]->String.Pointer, StartNode, 294 ACPI_NS_SEARCH_PARENT, &ParentNode); 295 if (ACPI_FAILURE (Status)) 296 { 297 return_ACPI_STATUS (Status); 298 } 299 } 300 301 /* ParameterPath (optional parameter) */ 302 303 if (Operand[4]->String.Length > 0) 304 { 305 if ((Operand[4]->String.Pointer[0] != '\\') && 306 (Operand[4]->String.Pointer[0] != '^')) 307 { 308 /* 309 * Path is not absolute, so it will be relative to the node 310 * referenced by the RootPathString (or the NS root if omitted) 311 */ 312 StartNode = ParentNode; 313 } 314 315 /* 316 * Find the node referenced by the ParameterPathString 317 */ 318 Status = AcpiNsGetNodeByPath (Operand[4]->String.Pointer, StartNode, 319 ACPI_NS_SEARCH_PARENT, &ParameterNode); 320 if (ACPI_FAILURE (Status)) 321 { 322 return_ACPI_STATUS (Status); 323 } 324 } 325 326 /* Load the table into the namespace */ 327 328 Status = AcpiExAddTable (Table, ParentNode, &DdbHandle); 329 if (ACPI_FAILURE (Status)) 330 { 331 return_ACPI_STATUS (Status); 332 } 333 334 /* Parameter Data (optional) */ 335 336 if (ParameterNode) 337 { 338 /* Store the parameter data into the optional parameter object */ 339 340 Status = AcpiExStore (Operand[5], ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParameterNode), 341 WalkState); 342 if (ACPI_FAILURE (Status)) 343 { 344 (void) AcpiExUnloadTable (DdbHandle); 345 return_ACPI_STATUS (Status); 346 } 347 } 348 349 *ReturnDesc = DdbHandle; 350 return_ACPI_STATUS (Status); 351} 352 353 354/******************************************************************************* 355 * 356 * FUNCTION: AcpiExLoadOp 357 * 358 * PARAMETERS: ObjDesc - Region or Field where the table will be 359 * obtained 360 * Target - Where a handle to the table will be stored 361 * WalkState - Current state 362 * 363 * RETURN: Status 364 * 365 * DESCRIPTION: Load an ACPI table from a field or operation region 366 * 367 ******************************************************************************/ 368 369ACPI_STATUS 370AcpiExLoadOp ( 371 ACPI_OPERAND_OBJECT *ObjDesc, 372 ACPI_OPERAND_OBJECT *Target, 373 ACPI_WALK_STATE *WalkState) 374{ 375 ACPI_STATUS Status; 376 ACPI_OPERAND_OBJECT *DdbHandle; 377 ACPI_OPERAND_OBJECT *BufferDesc = NULL; 378 ACPI_TABLE_HEADER *TablePtr = NULL; 379 ACPI_PHYSICAL_ADDRESS Address; 380 ACPI_TABLE_HEADER TableHeader; 381 UINT32 i; 382 383 ACPI_FUNCTION_TRACE ("ExLoadOp"); 384 385 386 /* Object can be either an OpRegion or a Field */ 387 388 switch (ACPI_GET_OBJECT_TYPE (ObjDesc)) 389 { 390 case ACPI_TYPE_REGION: 391 392 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Region %p %s\n", 393 ObjDesc, AcpiUtGetObjectTypeName (ObjDesc))); 394 395 /* 396 * If the Region Address and Length have not been previously evaluated, 397 * evaluate them now and save the results. 398 */ 399 if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)) 400 { 401 Status = AcpiDsGetRegionArguments (ObjDesc); 402 if (ACPI_FAILURE (Status)) 403 { 404 return_ACPI_STATUS (Status); 405 } 406 } 407 408 /* Get the base physical address of the region */ 409 410 Address = ObjDesc->Region.Address; 411 412 /* Get the table length from the table header */ 413 414 TableHeader.Length = 0; 415 for (i = 0; i < 8; i++) 416 { 417 Status = AcpiEvAddressSpaceDispatch (ObjDesc, ACPI_READ, 418 (ACPI_PHYSICAL_ADDRESS) (i + Address), 8, 419 ((UINT8 *) &TableHeader) + i); 420 if (ACPI_FAILURE (Status)) 421 { 422 return_ACPI_STATUS (Status); 423 } 424 } 425 426 /* Sanity check the table length */ 427 428 if (TableHeader.Length < sizeof (ACPI_TABLE_HEADER)) 429 { 430 return_ACPI_STATUS (AE_BAD_HEADER); 431 } 432 433 /* Allocate a buffer for the entire table */ 434 435 TablePtr = ACPI_MEM_ALLOCATE (TableHeader.Length); 436 if (!TablePtr) 437 { 438 return_ACPI_STATUS (AE_NO_MEMORY); 439 } 440 441 /* Get the entire table from the op region */ 442 443 for (i = 0; i < TableHeader.Length; i++) 444 { 445 Status = AcpiEvAddressSpaceDispatch (ObjDesc, ACPI_READ, 446 (ACPI_PHYSICAL_ADDRESS) (i + Address), 8, 447 ((UINT8 *) TablePtr + i)); 448 if (ACPI_FAILURE (Status)) 449 { 450 goto Cleanup; 451 } 452 } 453 break; 454 455 456 case ACPI_TYPE_LOCAL_REGION_FIELD: 457 case ACPI_TYPE_LOCAL_BANK_FIELD: 458 case ACPI_TYPE_LOCAL_INDEX_FIELD: 459 460 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Field %p %s\n", 461 ObjDesc, AcpiUtGetObjectTypeName (ObjDesc))); 462 463 /* 464 * The length of the field must be at least as large as the table. 465 * Read the entire field and thus the entire table. Buffer is 466 * allocated during the read. 467 */ 468 Status = AcpiExReadDataFromField (WalkState, ObjDesc, &BufferDesc); 469 if (ACPI_FAILURE (Status)) 470 { 471 goto Cleanup; 472 } 473 474 TablePtr = ACPI_CAST_PTR (ACPI_TABLE_HEADER, BufferDesc->Buffer.Pointer); 475 476 /* Sanity check the table length */ 477 478 if (TablePtr->Length < sizeof (ACPI_TABLE_HEADER)) 479 { 480 return_ACPI_STATUS (AE_BAD_HEADER); 481 } 482 break; 483 484 485 default: 486 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 487 } 488 489 /* The table must be either an SSDT or a PSDT */ 490 491 if ((!ACPI_STRNCMP (TablePtr->Signature, 492 AcpiGbl_TableData[ACPI_TABLE_PSDT].Signature, 493 AcpiGbl_TableData[ACPI_TABLE_PSDT].SigLength)) && 494 (!ACPI_STRNCMP (TablePtr->Signature, 495 AcpiGbl_TableData[ACPI_TABLE_SSDT].Signature, 496 AcpiGbl_TableData[ACPI_TABLE_SSDT].SigLength))) 497 { 498 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 499 "Table has invalid signature [%4.4s], must be SSDT or PSDT\n", 500 TablePtr->Signature)); 501 Status = AE_BAD_SIGNATURE; 502 goto Cleanup; 503 } 504 505 /* Install the new table into the local data structures */ 506 507 Status = AcpiExAddTable (TablePtr, AcpiGbl_RootNode, &DdbHandle); 508 if (ACPI_FAILURE (Status)) 509 { 510 goto Cleanup; 511 } 512 513 /* Store the DdbHandle into the Target operand */ 514 515 Status = AcpiExStore (DdbHandle, Target, WalkState); 516 if (ACPI_FAILURE (Status)) 517 { 518 (void) AcpiExUnloadTable (DdbHandle); 519 } 520 521 return_ACPI_STATUS (Status); 522 523 524Cleanup: 525 526 if (BufferDesc) 527 { 528 AcpiUtRemoveReference (BufferDesc); 529 } 530 else 531 { 532 ACPI_MEM_FREE (TablePtr); 533 } 534 return_ACPI_STATUS (Status); 535} 536 537 538/******************************************************************************* 539 * 540 * FUNCTION: AcpiExUnloadTable 541 * 542 * PARAMETERS: DdbHandle - Handle to a previously loaded table 543 * 544 * RETURN: Status 545 * 546 * DESCRIPTION: Unload an ACPI table 547 * 548 ******************************************************************************/ 549 550ACPI_STATUS 551AcpiExUnloadTable ( 552 ACPI_OPERAND_OBJECT *DdbHandle) 553{ 554 ACPI_STATUS Status = AE_OK; 555 ACPI_OPERAND_OBJECT *TableDesc = DdbHandle; 556 ACPI_TABLE_DESC *TableInfo; 557 558 559 ACPI_FUNCTION_TRACE ("ExUnloadTable"); 560 561 562 /* 563 * Validate the handle 564 * Although the handle is partially validated in AcpiExReconfiguration(), 565 * when it calls AcpiExResolveOperands(), the handle is more completely 566 * validated here. 567 */ 568 if ((!DdbHandle) || 569 (ACPI_GET_DESCRIPTOR_TYPE (DdbHandle) != ACPI_DESC_TYPE_OPERAND) || 570 (ACPI_GET_OBJECT_TYPE (DdbHandle) != ACPI_TYPE_LOCAL_REFERENCE)) 571 { 572 return_ACPI_STATUS (AE_BAD_PARAMETER); 573 } 574 575 /* Get the actual table descriptor from the DdbHandle */ 576 577 TableInfo = (ACPI_TABLE_DESC *) TableDesc->Reference.Object; 578 579 /* 580 * Delete the entire namespace under this table Node 581 * (Offset contains the TableId) 582 */ 583 AcpiNsDeleteNamespaceByOwner (TableInfo->TableId); 584 585 /* Delete the table itself */ 586 587 (void) AcpiTbUninstallTable (TableInfo->InstalledDesc); 588 589 /* Delete the table descriptor (DdbHandle) */ 590 591 AcpiUtRemoveReference (TableDesc); 592 return_ACPI_STATUS (Status); 593} 594 595