1 /******************************************************************************
3 * Module Name: tbxfload - Table load/unload external interfaces
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2014, 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 __TBXFLOAD_C__
117 #define EXPORT_ACPI_INTERFACES
120 #include "accommon.h"
121 #include "acnamesp.h"
122 #include "actables.h"
124 #define _COMPONENT ACPI_TABLES
125 ACPI_MODULE_NAME ("tbxfload")
127 /* Local prototypes */
130 AcpiTbLoadNamespace (
134 /*******************************************************************************
136 * FUNCTION: AcpiLoadTables
142 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
144 ******************************************************************************/
153 ACPI_FUNCTION_TRACE (AcpiLoadTables
);
156 /* Load the namespace from the tables */
158 Status
= AcpiTbLoadNamespace ();
159 if (ACPI_FAILURE (Status
))
161 ACPI_EXCEPTION ((AE_INFO
, Status
,
162 "While loading namespace from ACPI tables"));
165 return_ACPI_STATUS (Status
);
168 ACPI_EXPORT_SYMBOL_INIT (AcpiLoadTables
)
171 /*******************************************************************************
173 * FUNCTION: AcpiTbLoadNamespace
179 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
182 ******************************************************************************/
185 AcpiTbLoadNamespace (
190 ACPI_TABLE_HEADER
*NewDsdt
;
193 ACPI_FUNCTION_TRACE (TbLoadNamespace
);
196 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES
);
199 * Load the namespace. The DSDT is required, but any SSDT and
200 * PSDT tables are optional. Verify the DSDT.
202 if (!AcpiGbl_RootTableList
.CurrentTableCount
||
204 &(AcpiGbl_RootTableList
.Tables
[ACPI_TABLE_INDEX_DSDT
].Signature
),
206 ACPI_FAILURE (AcpiTbValidateTable (
207 &AcpiGbl_RootTableList
.Tables
[ACPI_TABLE_INDEX_DSDT
])))
209 Status
= AE_NO_ACPI_TABLES
;
214 * Save the DSDT pointer for simple access. This is the mapped memory
215 * address. We must take care here because the address of the .Tables
216 * array can change dynamically as tables are loaded at run-time. Note:
217 * .Pointer field is not validated until after call to AcpiTbValidateTable.
219 AcpiGbl_DSDT
= AcpiGbl_RootTableList
.Tables
[ACPI_TABLE_INDEX_DSDT
].Pointer
;
222 * Optionally copy the entire DSDT to local memory (instead of simply
223 * mapping it.) There are some BIOSs that corrupt or replace the original
224 * DSDT, creating the need for this option. Default is FALSE, do not copy
227 if (AcpiGbl_CopyDsdtLocally
)
229 NewDsdt
= AcpiTbCopyDsdt (ACPI_TABLE_INDEX_DSDT
);
232 AcpiGbl_DSDT
= NewDsdt
;
237 * Save the original DSDT header for detection of table corruption
238 * and/or replacement of the DSDT from outside the OS.
240 ACPI_MEMCPY (&AcpiGbl_OriginalDsdtHeader
, AcpiGbl_DSDT
,
241 sizeof (ACPI_TABLE_HEADER
));
243 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES
);
245 /* Load and parse tables */
247 Status
= AcpiNsLoadTable (ACPI_TABLE_INDEX_DSDT
, AcpiGbl_RootNode
);
248 if (ACPI_FAILURE (Status
))
250 return_ACPI_STATUS (Status
);
253 /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
255 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES
);
256 for (i
= 0; i
< AcpiGbl_RootTableList
.CurrentTableCount
; ++i
)
258 if ((!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList
.Tables
[i
].Signature
),
260 !ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList
.Tables
[i
].Signature
),
262 ACPI_FAILURE (AcpiTbValidateTable (
263 &AcpiGbl_RootTableList
.Tables
[i
])))
268 /* Ignore errors while loading tables, get as many as possible */
270 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES
);
271 (void) AcpiNsLoadTable (i
, AcpiGbl_RootNode
);
272 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES
);
275 ACPI_INFO ((AE_INFO
, "All ACPI Tables successfully acquired"));
278 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES
);
279 return_ACPI_STATUS (Status
);
283 /*******************************************************************************
285 * FUNCTION: AcpiInstallTable
287 * PARAMETERS: Address - Address of the ACPI table to be installed.
288 * Physical - Whether the address is a physical table
293 * DESCRIPTION: Dynamically install an ACPI table.
294 * Note: This function should only be invoked after
295 * AcpiInitializeTables() and before AcpiLoadTables().
297 ******************************************************************************/
301 ACPI_PHYSICAL_ADDRESS Address
,
309 ACPI_FUNCTION_TRACE (AcpiInstallTable
);
314 Flags
= ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL
;
318 Flags
= ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL
;
321 Status
= AcpiTbInstallStandardTable (Address
, Flags
,
322 FALSE
, FALSE
, &TableIndex
);
324 return_ACPI_STATUS (Status
);
327 ACPI_EXPORT_SYMBOL_INIT (AcpiInstallTable
)
330 /*******************************************************************************
332 * FUNCTION: AcpiLoadTable
334 * PARAMETERS: Table - Pointer to a buffer containing the ACPI
335 * table to be loaded.
339 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
340 * be a valid ACPI table with a valid ACPI table header.
341 * Note1: Mainly intended to support hotplug addition of SSDTs.
342 * Note2: Does not copy the incoming table. User is responsible
343 * to ensure that the table is not deleted or unmapped.
345 ******************************************************************************/
349 ACPI_TABLE_HEADER
*Table
)
355 ACPI_FUNCTION_TRACE (AcpiLoadTable
);
358 /* Parameter validation */
362 return_ACPI_STATUS (AE_BAD_PARAMETER
);
365 /* Must acquire the interpreter lock during this operation */
367 Status
= AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER
);
368 if (ACPI_FAILURE (Status
))
370 return_ACPI_STATUS (Status
);
373 /* Install the table and load it into the namespace */
375 ACPI_INFO ((AE_INFO
, "Host-directed Dynamic ACPI Table Load:"));
376 (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES
);
378 Status
= AcpiTbInstallStandardTable (ACPI_PTR_TO_PHYSADDR (Table
),
379 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL
, TRUE
, FALSE
,
382 (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES
);
383 if (ACPI_FAILURE (Status
))
389 * Note: Now table is "INSTALLED", it must be validated before
392 Status
= AcpiTbValidateTable (&AcpiGbl_RootTableList
.Tables
[TableIndex
]);
393 if (ACPI_FAILURE (Status
))
398 Status
= AcpiNsLoadTable (TableIndex
, AcpiGbl_RootNode
);
400 /* Invoke table handler if present */
402 if (AcpiGbl_TableHandler
)
404 (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD
, Table
,
405 AcpiGbl_TableHandlerContext
);
409 (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER
);
410 return_ACPI_STATUS (Status
);
413 ACPI_EXPORT_SYMBOL (AcpiLoadTable
)
416 /*******************************************************************************
418 * FUNCTION: AcpiUnloadParentTable
420 * PARAMETERS: Object - Handle to any namespace object owned by
421 * the table to be unloaded
425 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
426 * the table and deletes all namespace objects associated with
427 * that table. Unloading of the DSDT is not allowed.
428 * Note: Mainly intended to support hotplug removal of SSDTs.
430 ******************************************************************************/
433 AcpiUnloadParentTable (
436 ACPI_NAMESPACE_NODE
*Node
= ACPI_CAST_PTR (ACPI_NAMESPACE_NODE
, Object
);
437 ACPI_STATUS Status
= AE_NOT_EXIST
;
438 ACPI_OWNER_ID OwnerId
;
442 ACPI_FUNCTION_TRACE (AcpiUnloadParentTable
);
445 /* Parameter validation */
449 return_ACPI_STATUS (AE_BAD_PARAMETER
);
453 * The node OwnerId is currently the same as the parent table ID.
454 * However, this could change in the future.
456 OwnerId
= Node
->OwnerId
;
459 /* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */
461 return_ACPI_STATUS (AE_TYPE
);
464 /* Must acquire the interpreter lock during this operation */
466 Status
= AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER
);
467 if (ACPI_FAILURE (Status
))
469 return_ACPI_STATUS (Status
);
472 /* Find the table in the global table list */
474 for (i
= 0; i
< AcpiGbl_RootTableList
.CurrentTableCount
; i
++)
476 if (OwnerId
!= AcpiGbl_RootTableList
.Tables
[i
].OwnerId
)
482 * Allow unload of SSDT and OEMx tables only. Do not allow unload
483 * of the DSDT. No other types of tables should get here, since
484 * only these types can contain AML and thus are the only types
485 * that can create namespace objects.
487 if (ACPI_COMPARE_NAME (
488 AcpiGbl_RootTableList
.Tables
[i
].Signature
.Ascii
,
495 /* Ensure the table is actually loaded */
497 if (!AcpiTbIsTableLoaded (i
))
499 Status
= AE_NOT_EXIST
;
503 /* Invoke table handler if present */
505 if (AcpiGbl_TableHandler
)
507 (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD
,
508 AcpiGbl_RootTableList
.Tables
[i
].Pointer
,
509 AcpiGbl_TableHandlerContext
);
513 * Delete all namespace objects owned by this table. Note that
514 * these objects can appear anywhere in the namespace by virtue
515 * of the AML "Scope" operator. Thus, we need to track ownership
516 * by an ID, not simply a position within the hierarchy.
518 Status
= AcpiTbDeleteNamespaceByOwner (i
);
519 if (ACPI_FAILURE (Status
))
524 Status
= AcpiTbReleaseOwnerId (i
);
525 AcpiTbSetTableLoadedFlag (i
, FALSE
);
529 (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER
);
530 return_ACPI_STATUS (Status
);
533 ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable
)