1 /****************************************************************************** 2 * 3 * Module Name: tbxfload - Table load/unload external interfaces 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2022, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #define EXPORT_ACPI_INTERFACES 153 154 #include <contrib/dev/acpica/include/acpi.h> 155 #include <contrib/dev/acpica/include/accommon.h> 156 #include <contrib/dev/acpica/include/acnamesp.h> 157 #include <contrib/dev/acpica/include/actables.h> 158 #include <contrib/dev/acpica/include/acevents.h> 159 160 #define _COMPONENT ACPI_TABLES 161 ACPI_MODULE_NAME ("tbxfload") 162 163 164 /******************************************************************************* 165 * 166 * FUNCTION: AcpiLoadTables 167 * 168 * PARAMETERS: None 169 * 170 * RETURN: Status 171 * 172 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT 173 * 174 ******************************************************************************/ 175 176 ACPI_STATUS ACPI_INIT_FUNCTION 177 AcpiLoadTables ( 178 void) 179 { 180 ACPI_STATUS Status; 181 182 183 ACPI_FUNCTION_TRACE (AcpiLoadTables); 184 185 186 /* 187 * Install the default operation region handlers. These are the 188 * handlers that are defined by the ACPI specification to be 189 * "always accessible" -- namely, SystemMemory, SystemIO, and 190 * PCI_Config. This also means that no _REG methods need to be 191 * run for these address spaces. We need to have these handlers 192 * installed before any AML code can be executed, especially any 193 * module-level code (11/2015). 194 * Note that we allow OSPMs to install their own region handlers 195 * between AcpiInitializeSubsystem() and AcpiLoadTables() to use 196 * their customized default region handlers. 197 */ 198 Status = AcpiEvInstallRegionHandlers (); 199 if (ACPI_FAILURE (Status)) 200 { 201 ACPI_EXCEPTION ((AE_INFO, Status, "During Region initialization")); 202 return_ACPI_STATUS (Status); 203 } 204 205 /* Load the namespace from the tables */ 206 207 Status = AcpiTbLoadNamespace (); 208 209 /* Don't let single failures abort the load */ 210 211 if (Status == AE_CTRL_TERMINATE) 212 { 213 Status = AE_OK; 214 } 215 216 if (ACPI_FAILURE (Status)) 217 { 218 ACPI_EXCEPTION ((AE_INFO, Status, 219 "While loading namespace from ACPI tables")); 220 } 221 222 /* 223 * Initialize the objects in the namespace that remain uninitialized. 224 * This runs the executable AML that may be part of the declaration of 225 * these name objects: 226 * OperationRegions, BufferFields, Buffers, and Packages. 227 * 228 */ 229 Status = AcpiNsInitializeObjects (); 230 if (ACPI_SUCCESS (Status)) 231 { 232 AcpiGbl_NamespaceInitialized = TRUE; 233 } 234 235 return_ACPI_STATUS (Status); 236 } 237 238 ACPI_EXPORT_SYMBOL_INIT (AcpiLoadTables) 239 240 241 /******************************************************************************* 242 * 243 * FUNCTION: AcpiTbLoadNamespace 244 * 245 * PARAMETERS: None 246 * 247 * RETURN: Status 248 * 249 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in 250 * the RSDT/XSDT. 251 * 252 ******************************************************************************/ 253 254 ACPI_STATUS 255 AcpiTbLoadNamespace ( 256 void) 257 { 258 ACPI_STATUS Status; 259 UINT32 i; 260 ACPI_TABLE_HEADER *NewDsdt; 261 ACPI_TABLE_DESC *Table; 262 UINT32 TablesLoaded = 0; 263 UINT32 TablesFailed = 0; 264 265 266 ACPI_FUNCTION_TRACE (TbLoadNamespace); 267 268 269 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); 270 271 /* 272 * Load the namespace. The DSDT is required, but any SSDT and 273 * PSDT tables are optional. Verify the DSDT. 274 */ 275 Table = &AcpiGbl_RootTableList.Tables[AcpiGbl_DsdtIndex]; 276 277 if (!AcpiGbl_RootTableList.CurrentTableCount || 278 !ACPI_COMPARE_NAMESEG (Table->Signature.Ascii, ACPI_SIG_DSDT) || 279 ACPI_FAILURE (AcpiTbValidateTable (Table))) 280 { 281 Status = AE_NO_ACPI_TABLES; 282 goto UnlockAndExit; 283 } 284 285 /* 286 * Save the DSDT pointer for simple access. This is the mapped memory 287 * address. We must take care here because the address of the .Tables 288 * array can change dynamically as tables are loaded at run-time. Note: 289 * .Pointer field is not validated until after call to AcpiTbValidateTable. 290 */ 291 AcpiGbl_DSDT = Table->Pointer; 292 293 /* 294 * Optionally copy the entire DSDT to local memory (instead of simply 295 * mapping it.) There are some BIOSs that corrupt or replace the original 296 * DSDT, creating the need for this option. Default is FALSE, do not copy 297 * the DSDT. 298 */ 299 if (AcpiGbl_CopyDsdtLocally) 300 { 301 NewDsdt = AcpiTbCopyDsdt (AcpiGbl_DsdtIndex); 302 if (NewDsdt) 303 { 304 AcpiGbl_DSDT = NewDsdt; 305 } 306 } 307 308 /* 309 * Save the original DSDT header for detection of table corruption 310 * and/or replacement of the DSDT from outside the OS. 311 */ 312 memcpy (&AcpiGbl_OriginalDsdtHeader, AcpiGbl_DSDT, 313 sizeof (ACPI_TABLE_HEADER)); 314 315 /* Load and parse tables */ 316 317 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); 318 Status = AcpiNsLoadTable (AcpiGbl_DsdtIndex, AcpiGbl_RootNode); 319 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); 320 if (ACPI_FAILURE (Status)) 321 { 322 ACPI_EXCEPTION ((AE_INFO, Status, "[DSDT] table load failed")); 323 TablesFailed++; 324 } 325 else 326 { 327 TablesLoaded++; 328 } 329 330 /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */ 331 332 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i) 333 { 334 Table = &AcpiGbl_RootTableList.Tables[i]; 335 336 if (!Table->Address || 337 (!ACPI_COMPARE_NAMESEG (Table->Signature.Ascii, ACPI_SIG_SSDT) && 338 !ACPI_COMPARE_NAMESEG (Table->Signature.Ascii, ACPI_SIG_PSDT) && 339 !ACPI_COMPARE_NAMESEG (Table->Signature.Ascii, ACPI_SIG_OSDT)) || 340 ACPI_FAILURE (AcpiTbValidateTable (Table))) 341 { 342 continue; 343 } 344 345 /* Ignore errors while loading tables, get as many as possible */ 346 347 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); 348 Status = AcpiNsLoadTable (i, AcpiGbl_RootNode); 349 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); 350 if (ACPI_FAILURE (Status)) 351 { 352 ACPI_EXCEPTION ((AE_INFO, Status, "(%4.4s:%8.8s) while loading table", 353 Table->Signature.Ascii, Table->Pointer->OemTableId)); 354 355 TablesFailed++; 356 357 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 358 "Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n", 359 Table->Signature.Ascii, Table->Pointer->OemTableId)); 360 } 361 else 362 { 363 TablesLoaded++; 364 } 365 } 366 367 if (!TablesFailed) 368 { 369 ACPI_INFO (( 370 "%u ACPI AML tables successfully acquired and loaded", 371 TablesLoaded)); 372 } 373 else 374 { 375 ACPI_ERROR ((AE_INFO, 376 "%u table load failures, %u successful", 377 TablesFailed, TablesLoaded)); 378 379 /* Indicate at least one failure */ 380 381 Status = AE_CTRL_TERMINATE; 382 } 383 384 #ifdef ACPI_APPLICATION 385 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "\n")); 386 #endif 387 388 389 UnlockAndExit: 390 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); 391 return_ACPI_STATUS (Status); 392 } 393 394 395 /******************************************************************************* 396 * 397 * FUNCTION: AcpiInstallTable 398 * 399 * PARAMETERS: Table - Pointer to the ACPI table to be installed. 400 * 401 * RETURN: Status 402 * 403 * DESCRIPTION: Dynamically install an ACPI table. 404 * Note: This function should only be invoked after 405 * AcpiInitializeTables() and before AcpiLoadTables(). 406 * 407 ******************************************************************************/ 408 409 ACPI_STATUS ACPI_INIT_FUNCTION 410 AcpiInstallTable ( 411 ACPI_TABLE_HEADER *Table) 412 { 413 ACPI_STATUS Status; 414 UINT32 TableIndex; 415 416 417 ACPI_FUNCTION_TRACE (AcpiInstallTable); 418 419 420 Status = AcpiTbInstallStandardTable (ACPI_PTR_TO_PHYSADDR (Table), 421 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, Table, FALSE, FALSE, &TableIndex); 422 423 return_ACPI_STATUS (Status); 424 } 425 426 ACPI_EXPORT_SYMBOL_INIT (AcpiInstallTable) 427 428 429 /******************************************************************************* 430 * 431 * FUNCTION: AcpiInstallPhysicalTable 432 * 433 * PARAMETERS: Address - Address of the ACPI table to be installed. 434 * 435 * RETURN: Status 436 * 437 * DESCRIPTION: Dynamically install an ACPI table. 438 * Note: This function should only be invoked after 439 * AcpiInitializeTables() and before AcpiLoadTables(). 440 * 441 ******************************************************************************/ 442 443 ACPI_STATUS ACPI_INIT_FUNCTION 444 AcpiInstallPhysicalTable ( 445 ACPI_PHYSICAL_ADDRESS Address) 446 { 447 ACPI_STATUS Status; 448 UINT32 TableIndex; 449 450 451 ACPI_FUNCTION_TRACE (AcpiInstallPhysicalTable); 452 453 454 Status = AcpiTbInstallStandardTable (Address, 455 ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, FALSE, &TableIndex); 456 457 return_ACPI_STATUS (Status); 458 } 459 460 ACPI_EXPORT_SYMBOL_INIT (AcpiInstallPhysicalTable) 461 462 463 /******************************************************************************* 464 * 465 * FUNCTION: AcpiLoadTable 466 * 467 * PARAMETERS: Table - Pointer to a buffer containing the ACPI 468 * table to be loaded. 469 * TableIdx - Pointer to a UINT32 for storing the table 470 * index, might be NULL 471 * 472 * RETURN: Status 473 * 474 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must 475 * be a valid ACPI table with a valid ACPI table header. 476 * Note1: Mainly intended to support hotplug addition of SSDTs. 477 * Note2: Does not copy the incoming table. User is responsible 478 * to ensure that the table is not deleted or unmapped. 479 * 480 ******************************************************************************/ 481 482 ACPI_STATUS 483 AcpiLoadTable ( 484 ACPI_TABLE_HEADER *Table, 485 UINT32 *TableIdx) 486 { 487 ACPI_STATUS Status; 488 UINT32 TableIndex; 489 490 491 ACPI_FUNCTION_TRACE (AcpiLoadTable); 492 493 494 /* Parameter validation */ 495 496 if (!Table) 497 { 498 return_ACPI_STATUS (AE_BAD_PARAMETER); 499 } 500 501 /* Install the table and load it into the namespace */ 502 503 ACPI_INFO (("Host-directed Dynamic ACPI Table Load:")); 504 Status = AcpiTbInstallAndLoadTable (ACPI_PTR_TO_PHYSADDR (Table), 505 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, Table, FALSE, &TableIndex); 506 if (TableIdx) 507 { 508 *TableIdx = TableIndex; 509 } 510 511 if (ACPI_SUCCESS (Status)) 512 { 513 /* Complete the initialization/resolution of new objects */ 514 515 AcpiNsInitializeObjects (); 516 } 517 518 return_ACPI_STATUS (Status); 519 } 520 521 ACPI_EXPORT_SYMBOL (AcpiLoadTable) 522 523 524 /******************************************************************************* 525 * 526 * FUNCTION: AcpiUnloadParentTable 527 * 528 * PARAMETERS: Object - Handle to any namespace object owned by 529 * the table to be unloaded 530 * 531 * RETURN: Status 532 * 533 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads 534 * the table and deletes all namespace objects associated with 535 * that table. Unloading of the DSDT is not allowed. 536 * Note: Mainly intended to support hotplug removal of SSDTs. 537 * 538 ******************************************************************************/ 539 540 ACPI_STATUS 541 AcpiUnloadParentTable ( 542 ACPI_HANDLE Object) 543 { 544 ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Object); 545 ACPI_STATUS Status = AE_NOT_EXIST; 546 ACPI_OWNER_ID OwnerId; 547 UINT32 i; 548 549 550 ACPI_FUNCTION_TRACE (AcpiUnloadParentTable); 551 552 553 /* Parameter validation */ 554 555 if (!Object) 556 { 557 return_ACPI_STATUS (AE_BAD_PARAMETER); 558 } 559 560 /* 561 * The node OwnerId is currently the same as the parent table ID. 562 * However, this could change in the future. 563 */ 564 OwnerId = Node->OwnerId; 565 if (!OwnerId) 566 { 567 /* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */ 568 569 return_ACPI_STATUS (AE_TYPE); 570 } 571 572 /* Must acquire the table lock during this operation */ 573 574 Status = AcpiUtAcquireMutex (ACPI_MTX_TABLES); 575 if (ACPI_FAILURE (Status)) 576 { 577 return_ACPI_STATUS (Status); 578 } 579 580 /* Find the table in the global table list */ 581 582 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++) 583 { 584 if (OwnerId != AcpiGbl_RootTableList.Tables[i].OwnerId) 585 { 586 continue; 587 } 588 589 /* 590 * Allow unload of SSDT and OEMx tables only. Do not allow unload 591 * of the DSDT. No other types of tables should get here, since 592 * only these types can contain AML and thus are the only types 593 * that can create namespace objects. 594 */ 595 if (ACPI_COMPARE_NAMESEG ( 596 AcpiGbl_RootTableList.Tables[i].Signature.Ascii, 597 ACPI_SIG_DSDT)) 598 { 599 Status = AE_TYPE; 600 break; 601 } 602 603 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); 604 Status = AcpiTbUnloadTable (i); 605 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES); 606 break; 607 } 608 609 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES); 610 return_ACPI_STATUS (Status); 611 } 612 613 ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable) 614 615 616 /******************************************************************************* 617 * 618 * FUNCTION: AcpiUnloadTable 619 * 620 * PARAMETERS: TableIndex - Index as returned by AcpiLoadTable 621 * 622 * RETURN: Status 623 * 624 * DESCRIPTION: Via the TableIndex representing an SSDT or OEMx table, unloads 625 * the table and deletes all namespace objects associated with 626 * that table. Unloading of the DSDT is not allowed. 627 * Note: Mainly intended to support hotplug removal of SSDTs. 628 * 629 ******************************************************************************/ 630 631 ACPI_STATUS 632 AcpiUnloadTable ( 633 UINT32 TableIndex) 634 { 635 ACPI_STATUS Status; 636 637 638 ACPI_FUNCTION_TRACE (AcpiUnloadTable); 639 640 641 if (TableIndex == 1) 642 { 643 /* TableIndex==1 means DSDT is the owner. DSDT cannot be unloaded */ 644 645 return_ACPI_STATUS (AE_TYPE); 646 } 647 648 Status = AcpiTbUnloadTable (TableIndex); 649 return_ACPI_STATUS (Status); 650 } 651 652 ACPI_EXPORT_SYMBOL (AcpiUnloadTable) 653