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 - 2024, 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 "acpi.h"
155 #include "accommon.h"
156 #include "acnamesp.h"
157 #include "actables.h"
158 #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
AcpiLoadTables(void)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
ACPI_EXPORT_SYMBOL_INIT(AcpiLoadTables)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 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
269
270 #ifdef __ia64__
271 /*
272 * For ia64 ski emulator
273 */
274 if (AcpiGbl_DsdtIndex == ACPI_INVALID_TABLE_INDEX)
275 {
276 Status = AE_NO_ACPI_TABLES;
277 goto UnlockAndExit;
278 }
279 #endif
280
281 /*
282 * Load the namespace. The DSDT is required, but any SSDT and
283 * PSDT tables are optional. Verify the DSDT.
284 */
285 Table = &AcpiGbl_RootTableList.Tables[AcpiGbl_DsdtIndex];
286
287 if (!AcpiGbl_RootTableList.CurrentTableCount ||
288 !ACPI_COMPARE_NAMESEG (Table->Signature.Ascii, ACPI_SIG_DSDT) ||
289 ACPI_FAILURE (AcpiTbValidateTable (Table)))
290 {
291 Status = AE_NO_ACPI_TABLES;
292 goto UnlockAndExit;
293 }
294
295 /*
296 * Save the DSDT pointer for simple access. This is the mapped memory
297 * address. We must take care here because the address of the .Tables
298 * array can change dynamically as tables are loaded at run-time. Note:
299 * .Pointer field is not validated until after call to AcpiTbValidateTable.
300 */
301 AcpiGbl_DSDT = Table->Pointer;
302
303 /*
304 * Optionally copy the entire DSDT to local memory (instead of simply
305 * mapping it.) There are some BIOSs that corrupt or replace the original
306 * DSDT, creating the need for this option. Default is FALSE, do not copy
307 * the DSDT.
308 */
309 if (AcpiGbl_CopyDsdtLocally)
310 {
311 NewDsdt = AcpiTbCopyDsdt (AcpiGbl_DsdtIndex);
312 if (NewDsdt)
313 {
314 AcpiGbl_DSDT = NewDsdt;
315 }
316 }
317
318 /*
319 * Save the original DSDT header for detection of table corruption
320 * and/or replacement of the DSDT from outside the OS.
321 */
322 memcpy (&AcpiGbl_OriginalDsdtHeader, AcpiGbl_DSDT,
323 sizeof (ACPI_TABLE_HEADER));
324
325 /* Load and parse tables */
326
327 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
328 Status = AcpiNsLoadTable (AcpiGbl_DsdtIndex, AcpiGbl_RootNode);
329 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
330 if (ACPI_FAILURE (Status))
331 {
332 ACPI_EXCEPTION ((AE_INFO, Status, "[DSDT] table load failed"));
333 TablesFailed++;
334 }
335 else
336 {
337 TablesLoaded++;
338 }
339
340 /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
341
342 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
343 {
344 Table = &AcpiGbl_RootTableList.Tables[i];
345
346 if (!Table->Address ||
347 (!ACPI_COMPARE_NAMESEG (Table->Signature.Ascii, ACPI_SIG_SSDT) &&
348 !ACPI_COMPARE_NAMESEG (Table->Signature.Ascii, ACPI_SIG_PSDT) &&
349 !ACPI_COMPARE_NAMESEG (Table->Signature.Ascii, ACPI_SIG_OSDT)) ||
350 ACPI_FAILURE (AcpiTbValidateTable (Table)))
351 {
352 continue;
353 }
354
355 /* Ignore errors while loading tables, get as many as possible */
356
357 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
358 Status = AcpiNsLoadTable (i, AcpiGbl_RootNode);
359 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
360 if (ACPI_FAILURE (Status))
361 {
362 ACPI_EXCEPTION ((AE_INFO, Status, "(%4.4s:%8.8s) while loading table",
363 Table->Signature.Ascii, Table->Pointer->OemTableId));
364
365 TablesFailed++;
366
367 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
368 "Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n",
369 Table->Signature.Ascii, Table->Pointer->OemTableId));
370 }
371 else
372 {
373 TablesLoaded++;
374 }
375 }
376
377 if (!TablesFailed)
378 {
379 ACPI_INFO ((
380 "%u ACPI AML tables successfully acquired and loaded",
381 TablesLoaded));
382 }
383 else
384 {
385 ACPI_ERROR ((AE_INFO,
386 "%u table load failures, %u successful",
387 TablesFailed, TablesLoaded));
388
389 /* Indicate at least one failure */
390
391 Status = AE_CTRL_TERMINATE;
392 }
393
394 #ifdef ACPI_APPLICATION
395 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "\n"));
396 #endif
397
398
399 UnlockAndExit:
400 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
401 return_ACPI_STATUS (Status);
402 }
403
404
405 /*******************************************************************************
406 *
407 * FUNCTION: AcpiInstallTable
408 *
409 * PARAMETERS: Table - Pointer to the ACPI table to be installed.
410 *
411 * RETURN: Status
412 *
413 * DESCRIPTION: Dynamically install an ACPI table.
414 * Note: This function should only be invoked after
415 * AcpiInitializeTables() and before AcpiLoadTables().
416 *
417 ******************************************************************************/
418
419 ACPI_STATUS ACPI_INIT_FUNCTION
AcpiInstallTable(ACPI_TABLE_HEADER * Table)420 AcpiInstallTable (
421 ACPI_TABLE_HEADER *Table)
422 {
423 ACPI_STATUS Status;
424 UINT32 TableIndex;
425
426
427 ACPI_FUNCTION_TRACE (AcpiInstallTable);
428
429
430 Status = AcpiTbInstallStandardTable (ACPI_PTR_TO_PHYSADDR (Table),
431 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, Table, FALSE, FALSE, &TableIndex);
432
433 return_ACPI_STATUS (Status);
434 }
435
ACPI_EXPORT_SYMBOL_INIT(AcpiInstallTable)436 ACPI_EXPORT_SYMBOL_INIT (AcpiInstallTable)
437
438
439 /*******************************************************************************
440 *
441 * FUNCTION: AcpiInstallPhysicalTable
442 *
443 * PARAMETERS: Address - Address of the ACPI table to be installed.
444 *
445 * RETURN: Status
446 *
447 * DESCRIPTION: Dynamically install an ACPI table.
448 * Note: This function should only be invoked after
449 * AcpiInitializeTables() and before AcpiLoadTables().
450 *
451 ******************************************************************************/
452
453 ACPI_STATUS ACPI_INIT_FUNCTION
454 AcpiInstallPhysicalTable (
455 ACPI_PHYSICAL_ADDRESS Address)
456 {
457 ACPI_STATUS Status;
458 UINT32 TableIndex;
459
460
461 ACPI_FUNCTION_TRACE (AcpiInstallPhysicalTable);
462
463
464 Status = AcpiTbInstallStandardTable (Address,
465 ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, FALSE, &TableIndex);
466
467 return_ACPI_STATUS (Status);
468 }
469
ACPI_EXPORT_SYMBOL_INIT(AcpiInstallPhysicalTable)470 ACPI_EXPORT_SYMBOL_INIT (AcpiInstallPhysicalTable)
471
472
473 /*******************************************************************************
474 *
475 * FUNCTION: AcpiLoadTable
476 *
477 * PARAMETERS: Table - Pointer to a buffer containing the ACPI
478 * table to be loaded.
479 * TableIdx - Pointer to a UINT32 for storing the table
480 * index, might be NULL
481 *
482 * RETURN: Status
483 *
484 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
485 * be a valid ACPI table with a valid ACPI table header.
486 * Note1: Mainly intended to support hotplug addition of SSDTs.
487 * Note2: Does not copy the incoming table. User is responsible
488 * to ensure that the table is not deleted or unmapped.
489 *
490 ******************************************************************************/
491
492 ACPI_STATUS
493 AcpiLoadTable (
494 ACPI_TABLE_HEADER *Table,
495 UINT32 *TableIdx)
496 {
497 ACPI_STATUS Status;
498 UINT32 TableIndex;
499
500
501 ACPI_FUNCTION_TRACE (AcpiLoadTable);
502
503
504 /* Parameter validation */
505
506 if (!Table)
507 {
508 return_ACPI_STATUS (AE_BAD_PARAMETER);
509 }
510
511 /* Install the table and load it into the namespace */
512
513 ACPI_INFO (("Host-directed Dynamic ACPI Table Load:"));
514 Status = AcpiTbInstallAndLoadTable (ACPI_PTR_TO_PHYSADDR (Table),
515 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL, Table, FALSE, &TableIndex);
516 if (TableIdx)
517 {
518 *TableIdx = TableIndex;
519 }
520
521 if (ACPI_SUCCESS (Status))
522 {
523 /* Complete the initialization/resolution of new objects */
524
525 AcpiNsInitializeObjects ();
526 }
527
528 return_ACPI_STATUS (Status);
529 }
530
ACPI_EXPORT_SYMBOL(AcpiLoadTable)531 ACPI_EXPORT_SYMBOL (AcpiLoadTable)
532
533
534 /*******************************************************************************
535 *
536 * FUNCTION: AcpiUnloadParentTable
537 *
538 * PARAMETERS: Object - Handle to any namespace object owned by
539 * the table to be unloaded
540 *
541 * RETURN: Status
542 *
543 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
544 * the table and deletes all namespace objects associated with
545 * that table. Unloading of the DSDT is not allowed.
546 * Note: Mainly intended to support hotplug removal of SSDTs.
547 *
548 ******************************************************************************/
549
550 ACPI_STATUS
551 AcpiUnloadParentTable (
552 ACPI_HANDLE Object)
553 {
554 ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Object);
555 ACPI_STATUS Status = AE_NOT_EXIST;
556 ACPI_OWNER_ID OwnerId;
557 UINT32 i;
558
559
560 ACPI_FUNCTION_TRACE (AcpiUnloadParentTable);
561
562
563 /* Parameter validation */
564
565 if (!Object)
566 {
567 return_ACPI_STATUS (AE_BAD_PARAMETER);
568 }
569
570 /*
571 * The node OwnerId is currently the same as the parent table ID.
572 * However, this could change in the future.
573 */
574 OwnerId = Node->OwnerId;
575 if (!OwnerId)
576 {
577 /* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */
578
579 return_ACPI_STATUS (AE_TYPE);
580 }
581
582 /* Must acquire the table lock during this operation */
583
584 Status = AcpiUtAcquireMutex (ACPI_MTX_TABLES);
585 if (ACPI_FAILURE (Status))
586 {
587 return_ACPI_STATUS (Status);
588 }
589
590 /* Find the table in the global table list */
591
592 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
593 {
594 if (OwnerId != AcpiGbl_RootTableList.Tables[i].OwnerId)
595 {
596 continue;
597 }
598
599 /*
600 * Allow unload of SSDT and OEMx tables only. Do not allow unload
601 * of the DSDT. No other types of tables should get here, since
602 * only these types can contain AML and thus are the only types
603 * that can create namespace objects.
604 */
605 if (ACPI_COMPARE_NAMESEG (
606 AcpiGbl_RootTableList.Tables[i].Signature.Ascii,
607 ACPI_SIG_DSDT))
608 {
609 Status = AE_TYPE;
610 break;
611 }
612
613 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
614 Status = AcpiTbUnloadTable (i);
615 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
616 break;
617 }
618
619 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
620 return_ACPI_STATUS (Status);
621 }
622
ACPI_EXPORT_SYMBOL(AcpiUnloadParentTable)623 ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable)
624
625
626 /*******************************************************************************
627 *
628 * FUNCTION: AcpiUnloadTable
629 *
630 * PARAMETERS: TableIndex - Index as returned by AcpiLoadTable
631 *
632 * RETURN: Status
633 *
634 * DESCRIPTION: Via the TableIndex representing an SSDT or OEMx table, unloads
635 * the table and deletes all namespace objects associated with
636 * that table. Unloading of the DSDT is not allowed.
637 * Note: Mainly intended to support hotplug removal of SSDTs.
638 *
639 ******************************************************************************/
640
641 ACPI_STATUS
642 AcpiUnloadTable (
643 UINT32 TableIndex)
644 {
645 ACPI_STATUS Status;
646
647
648 ACPI_FUNCTION_TRACE (AcpiUnloadTable);
649
650
651 if (TableIndex == 1)
652 {
653 /* TableIndex==1 means DSDT is the owner. DSDT cannot be unloaded */
654
655 return_ACPI_STATUS (AE_TYPE);
656 }
657
658 Status = AcpiTbUnloadTable (TableIndex);
659 return_ACPI_STATUS (Status);
660 }
661
662 ACPI_EXPORT_SYMBOL (AcpiUnloadTable)
663