1 /******************************************************************************
3 * Module Name: tbxfload - Table load/unload external interfaces
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2015, Intel Corp.
12 * All rights reserved.
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
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
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;
37 * The above copyright and patent license is granted only if the following
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.
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
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
72 * 3.4. Intel retains all right, title, and interest in and to the Original
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.
80 * 4. Disclaimer and Export Compliance
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
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
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.
114 *****************************************************************************/
116 #define EXPORT_ACPI_INTERFACES
119 #include "accommon.h"
120 #include "acnamesp.h"
121 #include "actables.h"
123 #define _COMPONENT ACPI_TABLES
124 ACPI_MODULE_NAME ("tbxfload")
127 /*******************************************************************************
129 * FUNCTION: AcpiLoadTables
135 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
137 ******************************************************************************/
146 ACPI_FUNCTION_TRACE (AcpiLoadTables
);
149 /* Load the namespace from the tables */
151 Status
= AcpiTbLoadNamespace ();
153 /* Don't let single failures abort the load */
155 if (Status
== AE_CTRL_TERMINATE
)
160 if (ACPI_FAILURE (Status
))
162 ACPI_EXCEPTION ((AE_INFO
, Status
,
163 "While loading namespace from ACPI tables"));
166 return_ACPI_STATUS (Status
);
169 ACPI_EXPORT_SYMBOL_INIT (AcpiLoadTables
)
172 /*******************************************************************************
174 * FUNCTION: AcpiTbLoadNamespace
180 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
183 ******************************************************************************/
186 AcpiTbLoadNamespace (
191 ACPI_TABLE_HEADER
*NewDsdt
;
192 ACPI_TABLE_DESC
*Table
;
193 UINT32 TablesLoaded
= 0;
194 UINT32 TablesFailed
= 0;
197 ACPI_FUNCTION_TRACE (TbLoadNamespace
);
200 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES
);
203 * Load the namespace. The DSDT is required, but any SSDT and
204 * PSDT tables are optional. Verify the DSDT.
206 Table
= &AcpiGbl_RootTableList
.Tables
[AcpiGbl_DsdtIndex
];
208 if (!AcpiGbl_RootTableList
.CurrentTableCount
||
209 !ACPI_COMPARE_NAME (Table
->Signature
.Ascii
, ACPI_SIG_DSDT
) ||
210 ACPI_FAILURE (AcpiTbValidateTable (Table
)))
212 Status
= AE_NO_ACPI_TABLES
;
217 * Save the DSDT pointer for simple access. This is the mapped memory
218 * address. We must take care here because the address of the .Tables
219 * array can change dynamically as tables are loaded at run-time. Note:
220 * .Pointer field is not validated until after call to AcpiTbValidateTable.
222 AcpiGbl_DSDT
= Table
->Pointer
;
225 * Optionally copy the entire DSDT to local memory (instead of simply
226 * mapping it.) There are some BIOSs that corrupt or replace the original
227 * DSDT, creating the need for this option. Default is FALSE, do not copy
230 if (AcpiGbl_CopyDsdtLocally
)
232 NewDsdt
= AcpiTbCopyDsdt (AcpiGbl_DsdtIndex
);
235 AcpiGbl_DSDT
= NewDsdt
;
240 * Save the original DSDT header for detection of table corruption
241 * and/or replacement of the DSDT from outside the OS.
243 memcpy (&AcpiGbl_OriginalDsdtHeader
, AcpiGbl_DSDT
,
244 sizeof (ACPI_TABLE_HEADER
));
246 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES
);
248 /* Load and parse tables */
250 Status
= AcpiNsLoadTable (AcpiGbl_DsdtIndex
, AcpiGbl_RootNode
);
251 if (ACPI_FAILURE (Status
))
253 ACPI_EXCEPTION ((AE_INFO
, Status
, "[DSDT] table load failed"));
261 /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
263 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES
);
264 for (i
= 0; i
< AcpiGbl_RootTableList
.CurrentTableCount
; ++i
)
266 Table
= &AcpiGbl_RootTableList
.Tables
[i
];
268 if (!AcpiGbl_RootTableList
.Tables
[i
].Address
||
269 (!ACPI_COMPARE_NAME (Table
->Signature
.Ascii
, ACPI_SIG_SSDT
) &&
270 !ACPI_COMPARE_NAME (Table
->Signature
.Ascii
, ACPI_SIG_PSDT
) &&
271 !ACPI_COMPARE_NAME (Table
->Signature
.Ascii
, ACPI_SIG_OSDT
)) ||
272 ACPI_FAILURE (AcpiTbValidateTable (Table
)))
277 /* Ignore errors while loading tables, get as many as possible */
279 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES
);
280 Status
= AcpiNsLoadTable (i
, AcpiGbl_RootNode
);
281 if (ACPI_FAILURE (Status
))
283 ACPI_EXCEPTION ((AE_INFO
, Status
, "(%4.4s:%8.8s) while loading table",
284 Table
->Signature
.Ascii
, Table
->Pointer
->OemTableId
));
288 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT
,
289 "Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n",
290 Table
->Signature
.Ascii
, Table
->Pointer
->OemTableId
));
297 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES
);
303 "%u ACPI AML tables successfully acquired and loaded\n",
308 ACPI_ERROR ((AE_INFO
,
309 "%u table load failures, %u successful",
310 TablesFailed
, TablesLoaded
));
312 /* Indicate at least one failure */
314 Status
= AE_CTRL_TERMINATE
;
318 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES
);
319 return_ACPI_STATUS (Status
);
323 /*******************************************************************************
325 * FUNCTION: AcpiInstallTable
327 * PARAMETERS: Address - Address of the ACPI table to be installed.
328 * Physical - Whether the address is a physical table
333 * DESCRIPTION: Dynamically install an ACPI table.
334 * Note: This function should only be invoked after
335 * AcpiInitializeTables() and before AcpiLoadTables().
337 ******************************************************************************/
341 ACPI_PHYSICAL_ADDRESS Address
,
349 ACPI_FUNCTION_TRACE (AcpiInstallTable
);
354 Flags
= ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL
;
358 Flags
= ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL
;
361 Status
= AcpiTbInstallStandardTable (Address
, Flags
,
362 FALSE
, FALSE
, &TableIndex
);
364 return_ACPI_STATUS (Status
);
367 ACPI_EXPORT_SYMBOL_INIT (AcpiInstallTable
)
370 /*******************************************************************************
372 * FUNCTION: AcpiLoadTable
374 * PARAMETERS: Table - Pointer to a buffer containing the ACPI
375 * table to be loaded.
379 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
380 * be a valid ACPI table with a valid ACPI table header.
381 * Note1: Mainly intended to support hotplug addition of SSDTs.
382 * Note2: Does not copy the incoming table. User is responsible
383 * to ensure that the table is not deleted or unmapped.
385 ******************************************************************************/
389 ACPI_TABLE_HEADER
*Table
)
395 ACPI_FUNCTION_TRACE (AcpiLoadTable
);
398 /* Parameter validation */
402 return_ACPI_STATUS (AE_BAD_PARAMETER
);
405 /* Must acquire the interpreter lock during this operation */
407 Status
= AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER
);
408 if (ACPI_FAILURE (Status
))
410 return_ACPI_STATUS (Status
);
413 /* Install the table and load it into the namespace */
415 ACPI_INFO ((AE_INFO
, "Host-directed Dynamic ACPI Table Load:"));
416 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES
);
418 Status
= AcpiTbInstallStandardTable (ACPI_PTR_TO_PHYSADDR (Table
),
419 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL
, TRUE
, FALSE
,
422 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES
);
423 if (ACPI_FAILURE (Status
))
429 * Note: Now table is "INSTALLED", it must be validated before
432 Status
= AcpiTbValidateTable (
433 &AcpiGbl_RootTableList
.Tables
[TableIndex
]);
434 if (ACPI_FAILURE (Status
))
439 Status
= AcpiNsLoadTable (TableIndex
, AcpiGbl_RootNode
);
441 /* Invoke table handler if present */
443 if (AcpiGbl_TableHandler
)
445 (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD
, Table
,
446 AcpiGbl_TableHandlerContext
);
450 (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER
);
451 return_ACPI_STATUS (Status
);
454 ACPI_EXPORT_SYMBOL (AcpiLoadTable
)
457 /*******************************************************************************
459 * FUNCTION: AcpiUnloadParentTable
461 * PARAMETERS: Object - Handle to any namespace object owned by
462 * the table to be unloaded
466 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
467 * the table and deletes all namespace objects associated with
468 * that table. Unloading of the DSDT is not allowed.
469 * Note: Mainly intended to support hotplug removal of SSDTs.
471 ******************************************************************************/
474 AcpiUnloadParentTable (
477 ACPI_NAMESPACE_NODE
*Node
= ACPI_CAST_PTR (ACPI_NAMESPACE_NODE
, Object
);
478 ACPI_STATUS Status
= AE_NOT_EXIST
;
479 ACPI_OWNER_ID OwnerId
;
483 ACPI_FUNCTION_TRACE (AcpiUnloadParentTable
);
486 /* Parameter validation */
490 return_ACPI_STATUS (AE_BAD_PARAMETER
);
494 * The node OwnerId is currently the same as the parent table ID.
495 * However, this could change in the future.
497 OwnerId
= Node
->OwnerId
;
500 /* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */
502 return_ACPI_STATUS (AE_TYPE
);
505 /* Must acquire the interpreter lock during this operation */
507 Status
= AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER
);
508 if (ACPI_FAILURE (Status
))
510 return_ACPI_STATUS (Status
);
513 /* Find the table in the global table list */
515 for (i
= 0; i
< AcpiGbl_RootTableList
.CurrentTableCount
; i
++)
517 if (OwnerId
!= AcpiGbl_RootTableList
.Tables
[i
].OwnerId
)
523 * Allow unload of SSDT and OEMx tables only. Do not allow unload
524 * of the DSDT. No other types of tables should get here, since
525 * only these types can contain AML and thus are the only types
526 * that can create namespace objects.
528 if (ACPI_COMPARE_NAME (
529 AcpiGbl_RootTableList
.Tables
[i
].Signature
.Ascii
,
536 /* Ensure the table is actually loaded */
538 if (!AcpiTbIsTableLoaded (i
))
540 Status
= AE_NOT_EXIST
;
544 /* Invoke table handler if present */
546 if (AcpiGbl_TableHandler
)
548 (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD
,
549 AcpiGbl_RootTableList
.Tables
[i
].Pointer
,
550 AcpiGbl_TableHandlerContext
);
554 * Delete all namespace objects owned by this table. Note that
555 * these objects can appear anywhere in the namespace by virtue
556 * of the AML "Scope" operator. Thus, we need to track ownership
557 * by an ID, not simply a position within the hierarchy.
559 Status
= AcpiTbDeleteNamespaceByOwner (i
);
560 if (ACPI_FAILURE (Status
))
565 Status
= AcpiTbReleaseOwnerId (i
);
566 AcpiTbSetTableLoadedFlag (i
, FALSE
);
570 (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER
);
571 return_ACPI_STATUS (Status
);
574 ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable
)