1 /******************************************************************************
3 * Module Name: tbxfload - Table load/unload external interfaces
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2016, Intel Corp.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
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15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
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18 * substantially similar to the "NO WARRANTY" disclaimer below
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20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
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44 #define EXPORT_ACPI_INTERFACES
46 #include <acpi/acpi.h>
51 #define _COMPONENT ACPI_TABLES
52 ACPI_MODULE_NAME("tbxfload")
54 /*******************************************************************************
56 * FUNCTION: acpi_load_tables
62 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
64 ******************************************************************************/
65 acpi_status __init
acpi_load_tables(void)
69 ACPI_FUNCTION_TRACE(acpi_load_tables
);
71 /* Load the namespace from the tables */
73 status
= acpi_tb_load_namespace();
75 /* Don't let single failures abort the load */
77 if (status
== AE_CTRL_TERMINATE
) {
81 if (ACPI_FAILURE(status
)) {
82 ACPI_EXCEPTION((AE_INFO
, status
,
83 "While loading namespace from ACPI tables"));
86 return_ACPI_STATUS(status
);
89 ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables
)
91 /*******************************************************************************
93 * FUNCTION: acpi_tb_load_namespace
99 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
102 ******************************************************************************/
103 acpi_status
acpi_tb_load_namespace(void)
107 struct acpi_table_header
*new_dsdt
;
108 struct acpi_table_desc
*table
;
109 u32 tables_loaded
= 0;
110 u32 tables_failed
= 0;
112 ACPI_FUNCTION_TRACE(tb_load_namespace
);
114 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES
);
117 * Load the namespace. The DSDT is required, but any SSDT and
118 * PSDT tables are optional. Verify the DSDT.
120 table
= &acpi_gbl_root_table_list
.tables
[acpi_gbl_dsdt_index
];
122 if (!acpi_gbl_root_table_list
.current_table_count
||
123 !ACPI_COMPARE_NAME(table
->signature
.ascii
, ACPI_SIG_DSDT
) ||
124 ACPI_FAILURE(acpi_tb_validate_table(table
))) {
125 status
= AE_NO_ACPI_TABLES
;
126 goto unlock_and_exit
;
130 * Save the DSDT pointer for simple access. This is the mapped memory
131 * address. We must take care here because the address of the .Tables
132 * array can change dynamically as tables are loaded at run-time. Note:
133 * .Pointer field is not validated until after call to acpi_tb_validate_table.
135 acpi_gbl_DSDT
= table
->pointer
;
138 * Optionally copy the entire DSDT to local memory (instead of simply
139 * mapping it.) There are some BIOSs that corrupt or replace the original
140 * DSDT, creating the need for this option. Default is FALSE, do not copy
143 if (acpi_gbl_copy_dsdt_locally
) {
144 new_dsdt
= acpi_tb_copy_dsdt(acpi_gbl_dsdt_index
);
146 acpi_gbl_DSDT
= new_dsdt
;
151 * Save the original DSDT header for detection of table corruption
152 * and/or replacement of the DSDT from outside the OS.
154 memcpy(&acpi_gbl_original_dsdt_header
, acpi_gbl_DSDT
,
155 sizeof(struct acpi_table_header
));
157 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES
);
159 /* Load and parse tables */
161 status
= acpi_ns_load_table(acpi_gbl_dsdt_index
, acpi_gbl_root_node
);
162 if (ACPI_FAILURE(status
)) {
163 ACPI_EXCEPTION((AE_INFO
, status
, "[DSDT] table load failed"));
169 /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
171 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES
);
172 for (i
= 0; i
< acpi_gbl_root_table_list
.current_table_count
; ++i
) {
173 table
= &acpi_gbl_root_table_list
.tables
[i
];
175 if (!acpi_gbl_root_table_list
.tables
[i
].address
||
176 (!ACPI_COMPARE_NAME(table
->signature
.ascii
, ACPI_SIG_SSDT
)
177 && !ACPI_COMPARE_NAME(table
->signature
.ascii
,
179 && !ACPI_COMPARE_NAME(table
->signature
.ascii
,
181 || ACPI_FAILURE(acpi_tb_validate_table(table
))) {
185 /* Ignore errors while loading tables, get as many as possible */
187 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES
);
188 status
= acpi_ns_load_table(i
, acpi_gbl_root_node
);
189 if (ACPI_FAILURE(status
)) {
190 ACPI_EXCEPTION((AE_INFO
, status
,
191 "(%4.4s:%8.8s) while loading table",
192 table
->signature
.ascii
,
193 table
->pointer
->oem_table_id
));
197 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT
,
198 "Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n",
199 table
->signature
.ascii
,
200 table
->pointer
->oem_table_id
));
205 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES
);
208 if (!tables_failed
) {
210 "%u ACPI AML tables successfully acquired and loaded\n",
214 "%u table load failures, %u successful",
215 tables_failed
, tables_loaded
));
217 /* Indicate at least one failure */
219 status
= AE_CTRL_TERMINATE
;
223 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES
);
224 return_ACPI_STATUS(status
);
227 /*******************************************************************************
229 * FUNCTION: acpi_install_table
231 * PARAMETERS: address - Address of the ACPI table to be installed.
232 * physical - Whether the address is a physical table
237 * DESCRIPTION: Dynamically install an ACPI table.
238 * Note: This function should only be invoked after
239 * acpi_initialize_tables() and before acpi_load_tables().
241 ******************************************************************************/
244 acpi_install_table(acpi_physical_address address
, u8 physical
)
250 ACPI_FUNCTION_TRACE(acpi_install_table
);
253 flags
= ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL
;
255 flags
= ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL
;
258 status
= acpi_tb_install_standard_table(address
, flags
,
259 FALSE
, FALSE
, &table_index
);
261 return_ACPI_STATUS(status
);
264 ACPI_EXPORT_SYMBOL_INIT(acpi_install_table
)
266 /*******************************************************************************
268 * FUNCTION: acpi_load_table
270 * PARAMETERS: table - Pointer to a buffer containing the ACPI
271 * table to be loaded.
275 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
276 * be a valid ACPI table with a valid ACPI table header.
277 * Note1: Mainly intended to support hotplug addition of SSDTs.
278 * Note2: Does not copy the incoming table. User is responsible
279 * to ensure that the table is not deleted or unmapped.
281 ******************************************************************************/
282 acpi_status
acpi_load_table(struct acpi_table_header
*table
)
287 ACPI_FUNCTION_TRACE(acpi_load_table
);
289 /* Parameter validation */
292 return_ACPI_STATUS(AE_BAD_PARAMETER
);
295 /* Must acquire the interpreter lock during this operation */
297 status
= acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER
);
298 if (ACPI_FAILURE(status
)) {
299 return_ACPI_STATUS(status
);
302 /* Install the table and load it into the namespace */
304 ACPI_INFO((AE_INFO
, "Host-directed Dynamic ACPI Table Load:"));
305 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES
);
307 status
= acpi_tb_install_standard_table(ACPI_PTR_TO_PHYSADDR(table
),
308 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL
,
309 TRUE
, FALSE
, &table_index
);
311 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES
);
312 if (ACPI_FAILURE(status
)) {
313 goto unlock_and_exit
;
317 * Note: Now table is "INSTALLED", it must be validated before
321 acpi_tb_validate_table(&acpi_gbl_root_table_list
.
322 tables
[table_index
]);
323 if (ACPI_FAILURE(status
)) {
324 goto unlock_and_exit
;
327 status
= acpi_ns_load_table(table_index
, acpi_gbl_root_node
);
329 /* Invoke table handler if present */
331 if (acpi_gbl_table_handler
) {
332 (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_LOAD
, table
,
333 acpi_gbl_table_handler_context
);
337 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER
);
338 return_ACPI_STATUS(status
);
341 ACPI_EXPORT_SYMBOL(acpi_load_table
)
343 /*******************************************************************************
345 * FUNCTION: acpi_unload_parent_table
347 * PARAMETERS: object - Handle to any namespace object owned by
348 * the table to be unloaded
352 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
353 * the table and deletes all namespace objects associated with
354 * that table. Unloading of the DSDT is not allowed.
355 * Note: Mainly intended to support hotplug removal of SSDTs.
357 ******************************************************************************/
358 acpi_status
acpi_unload_parent_table(acpi_handle object
)
360 struct acpi_namespace_node
*node
=
361 ACPI_CAST_PTR(struct acpi_namespace_node
, object
);
362 acpi_status status
= AE_NOT_EXIST
;
363 acpi_owner_id owner_id
;
366 ACPI_FUNCTION_TRACE(acpi_unload_parent_table
);
368 /* Parameter validation */
371 return_ACPI_STATUS(AE_BAD_PARAMETER
);
375 * The node owner_id is currently the same as the parent table ID.
376 * However, this could change in the future.
378 owner_id
= node
->owner_id
;
381 /* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */
383 return_ACPI_STATUS(AE_TYPE
);
386 /* Must acquire the interpreter lock during this operation */
388 status
= acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER
);
389 if (ACPI_FAILURE(status
)) {
390 return_ACPI_STATUS(status
);
393 /* Find the table in the global table list */
395 for (i
= 0; i
< acpi_gbl_root_table_list
.current_table_count
; i
++) {
396 if (owner_id
!= acpi_gbl_root_table_list
.tables
[i
].owner_id
) {
401 * Allow unload of SSDT and OEMx tables only. Do not allow unload
402 * of the DSDT. No other types of tables should get here, since
403 * only these types can contain AML and thus are the only types
404 * that can create namespace objects.
406 if (ACPI_COMPARE_NAME
407 (acpi_gbl_root_table_list
.tables
[i
].signature
.ascii
,
413 /* Ensure the table is actually loaded */
415 if (!acpi_tb_is_table_loaded(i
)) {
416 status
= AE_NOT_EXIST
;
420 /* Invoke table handler if present */
422 if (acpi_gbl_table_handler
) {
423 (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD
,
424 acpi_gbl_root_table_list
.
426 acpi_gbl_table_handler_context
);
430 * Delete all namespace objects owned by this table. Note that
431 * these objects can appear anywhere in the namespace by virtue
432 * of the AML "Scope" operator. Thus, we need to track ownership
433 * by an ID, not simply a position within the hierarchy.
435 status
= acpi_tb_delete_namespace_by_owner(i
);
436 if (ACPI_FAILURE(status
)) {
440 status
= acpi_tb_release_owner_id(i
);
441 acpi_tb_set_table_loaded_flag(i
, FALSE
);
445 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER
);
446 return_ACPI_STATUS(status
);
449 ACPI_EXPORT_SYMBOL(acpi_unload_parent_table
)