1 /******************************************************************************
3 * Module Name: tbxfload - Table load/unload external interfaces
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2016, Intel Corp.
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12 * modification, are permitted provided that the following conditions
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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>
52 #define _COMPONENT ACPI_TABLES
53 ACPI_MODULE_NAME("tbxfload")
55 /*******************************************************************************
57 * FUNCTION: acpi_load_tables
63 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
65 ******************************************************************************/
66 acpi_status ACPI_INIT_FUNCTION
acpi_load_tables(void)
70 ACPI_FUNCTION_TRACE(acpi_load_tables
);
73 * Install the default operation region handlers. These are the
74 * handlers that are defined by the ACPI specification to be
75 * "always accessible" -- namely, system_memory, system_IO, and
76 * PCI_Config. This also means that no _REG methods need to be
77 * run for these address spaces. We need to have these handlers
78 * installed before any AML code can be executed, especially any
79 * module-level code (11/2015).
80 * Note that we allow OSPMs to install their own region handlers
81 * between acpi_initialize_subsystem() and acpi_load_tables() to use
82 * their customized default region handlers.
84 status
= acpi_ev_install_region_handlers();
85 if (ACPI_FAILURE(status
)) {
86 ACPI_EXCEPTION((AE_INFO
, status
,
87 "During Region initialization"));
88 return_ACPI_STATUS(status
);
91 /* Load the namespace from the tables */
93 status
= acpi_tb_load_namespace();
95 /* Don't let single failures abort the load */
97 if (status
== AE_CTRL_TERMINATE
) {
101 if (ACPI_FAILURE(status
)) {
102 ACPI_EXCEPTION((AE_INFO
, status
,
103 "While loading namespace from ACPI tables"));
106 if (acpi_gbl_parse_table_as_term_list
107 || !acpi_gbl_group_module_level_code
) {
109 * Initialize the objects that remain uninitialized. This
110 * runs the executable AML that may be part of the
111 * declaration of these objects:
112 * operation_regions, buffer_fields, Buffers, and Packages.
114 status
= acpi_ns_initialize_objects();
115 if (ACPI_FAILURE(status
)) {
116 return_ACPI_STATUS(status
);
120 acpi_gbl_namespace_initialized
= TRUE
;
121 return_ACPI_STATUS(status
);
124 ACPI_EXPORT_SYMBOL_INIT(acpi_load_tables
)
126 /*******************************************************************************
128 * FUNCTION: acpi_tb_load_namespace
134 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
137 ******************************************************************************/
138 acpi_status
acpi_tb_load_namespace(void)
142 struct acpi_table_header
*new_dsdt
;
143 struct acpi_table_desc
*table
;
144 u32 tables_loaded
= 0;
145 u32 tables_failed
= 0;
147 ACPI_FUNCTION_TRACE(tb_load_namespace
);
149 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES
);
152 * Load the namespace. The DSDT is required, but any SSDT and
153 * PSDT tables are optional. Verify the DSDT.
155 table
= &acpi_gbl_root_table_list
.tables
[acpi_gbl_dsdt_index
];
157 if (!acpi_gbl_root_table_list
.current_table_count
||
158 !ACPI_COMPARE_NAME(table
->signature
.ascii
, ACPI_SIG_DSDT
) ||
159 ACPI_FAILURE(acpi_tb_validate_table(table
))) {
160 status
= AE_NO_ACPI_TABLES
;
161 goto unlock_and_exit
;
165 * Save the DSDT pointer for simple access. This is the mapped memory
166 * address. We must take care here because the address of the .Tables
167 * array can change dynamically as tables are loaded at run-time. Note:
168 * .Pointer field is not validated until after call to acpi_tb_validate_table.
170 acpi_gbl_DSDT
= table
->pointer
;
173 * Optionally copy the entire DSDT to local memory (instead of simply
174 * mapping it.) There are some BIOSs that corrupt or replace the original
175 * DSDT, creating the need for this option. Default is FALSE, do not copy
178 if (acpi_gbl_copy_dsdt_locally
) {
179 new_dsdt
= acpi_tb_copy_dsdt(acpi_gbl_dsdt_index
);
181 acpi_gbl_DSDT
= new_dsdt
;
186 * Save the original DSDT header for detection of table corruption
187 * and/or replacement of the DSDT from outside the OS.
189 memcpy(&acpi_gbl_original_dsdt_header
, acpi_gbl_DSDT
,
190 sizeof(struct acpi_table_header
));
192 /* Load and parse tables */
194 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES
);
195 status
= acpi_ns_load_table(acpi_gbl_dsdt_index
, acpi_gbl_root_node
);
196 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES
);
197 if (ACPI_FAILURE(status
)) {
198 ACPI_EXCEPTION((AE_INFO
, status
, "[DSDT] table load failed"));
204 /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
206 for (i
= 0; i
< acpi_gbl_root_table_list
.current_table_count
; ++i
) {
207 table
= &acpi_gbl_root_table_list
.tables
[i
];
209 if (!acpi_gbl_root_table_list
.tables
[i
].address
||
210 (!ACPI_COMPARE_NAME(table
->signature
.ascii
, ACPI_SIG_SSDT
)
211 && !ACPI_COMPARE_NAME(table
->signature
.ascii
,
213 && !ACPI_COMPARE_NAME(table
->signature
.ascii
,
215 || ACPI_FAILURE(acpi_tb_validate_table(table
))) {
219 /* Ignore errors while loading tables, get as many as possible */
221 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES
);
222 status
= acpi_ns_load_table(i
, acpi_gbl_root_node
);
223 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES
);
224 if (ACPI_FAILURE(status
)) {
225 ACPI_EXCEPTION((AE_INFO
, status
,
226 "(%4.4s:%8.8s) while loading table",
227 table
->signature
.ascii
,
228 table
->pointer
->oem_table_id
));
232 ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT
,
233 "Table [%4.4s:%8.8s] (id FF) - Table namespace load failed\n\n",
234 table
->signature
.ascii
,
235 table
->pointer
->oem_table_id
));
241 if (!tables_failed
) {
242 ACPI_INFO(("%u ACPI AML tables successfully acquired and loaded\n", tables_loaded
));
245 "%u table load failures, %u successful",
246 tables_failed
, tables_loaded
));
248 /* Indicate at least one failure */
250 status
= AE_CTRL_TERMINATE
;
254 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES
);
255 return_ACPI_STATUS(status
);
258 /*******************************************************************************
260 * FUNCTION: acpi_install_table
262 * PARAMETERS: address - Address of the ACPI table to be installed.
263 * physical - Whether the address is a physical table
268 * DESCRIPTION: Dynamically install an ACPI table.
269 * Note: This function should only be invoked after
270 * acpi_initialize_tables() and before acpi_load_tables().
272 ******************************************************************************/
274 acpi_status ACPI_INIT_FUNCTION
275 acpi_install_table(acpi_physical_address address
, u8 physical
)
281 ACPI_FUNCTION_TRACE(acpi_install_table
);
284 flags
= ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL
;
286 flags
= ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL
;
289 status
= acpi_tb_install_standard_table(address
, flags
,
290 FALSE
, FALSE
, &table_index
);
292 return_ACPI_STATUS(status
);
295 ACPI_EXPORT_SYMBOL_INIT(acpi_install_table
)
297 /*******************************************************************************
299 * FUNCTION: acpi_load_table
301 * PARAMETERS: table - Pointer to a buffer containing the ACPI
302 * table to be loaded.
306 * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
307 * be a valid ACPI table with a valid ACPI table header.
308 * Note1: Mainly intended to support hotplug addition of SSDTs.
309 * Note2: Does not copy the incoming table. User is responsible
310 * to ensure that the table is not deleted or unmapped.
312 ******************************************************************************/
313 acpi_status
acpi_load_table(struct acpi_table_header
*table
)
318 ACPI_FUNCTION_TRACE(acpi_load_table
);
320 /* Parameter validation */
323 return_ACPI_STATUS(AE_BAD_PARAMETER
);
326 /* Install the table and load it into the namespace */
328 ACPI_INFO(("Host-directed Dynamic ACPI Table Load:"));
330 acpi_tb_install_and_load_table(table
, ACPI_PTR_TO_PHYSADDR(table
),
331 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL
,
332 FALSE
, &table_index
);
333 return_ACPI_STATUS(status
);
336 ACPI_EXPORT_SYMBOL(acpi_load_table
)
338 /*******************************************************************************
340 * FUNCTION: acpi_unload_parent_table
342 * PARAMETERS: object - Handle to any namespace object owned by
343 * the table to be unloaded
347 * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
348 * the table and deletes all namespace objects associated with
349 * that table. Unloading of the DSDT is not allowed.
350 * Note: Mainly intended to support hotplug removal of SSDTs.
352 ******************************************************************************/
353 acpi_status
acpi_unload_parent_table(acpi_handle object
)
355 struct acpi_namespace_node
*node
=
356 ACPI_CAST_PTR(struct acpi_namespace_node
, object
);
357 acpi_status status
= AE_NOT_EXIST
;
358 acpi_owner_id owner_id
;
361 ACPI_FUNCTION_TRACE(acpi_unload_parent_table
);
363 /* Parameter validation */
366 return_ACPI_STATUS(AE_BAD_PARAMETER
);
370 * The node owner_id is currently the same as the parent table ID.
371 * However, this could change in the future.
373 owner_id
= node
->owner_id
;
376 /* owner_id==0 means DSDT is the owner. DSDT cannot be unloaded */
378 return_ACPI_STATUS(AE_TYPE
);
381 /* Must acquire the interpreter lock during this operation */
383 status
= acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER
);
384 if (ACPI_FAILURE(status
)) {
385 return_ACPI_STATUS(status
);
388 /* Find the table in the global table list */
390 for (i
= 0; i
< acpi_gbl_root_table_list
.current_table_count
; i
++) {
391 if (owner_id
!= acpi_gbl_root_table_list
.tables
[i
].owner_id
) {
396 * Allow unload of SSDT and OEMx tables only. Do not allow unload
397 * of the DSDT. No other types of tables should get here, since
398 * only these types can contain AML and thus are the only types
399 * that can create namespace objects.
401 if (ACPI_COMPARE_NAME
402 (acpi_gbl_root_table_list
.tables
[i
].signature
.ascii
,
408 /* Ensure the table is actually loaded */
410 if (!acpi_tb_is_table_loaded(i
)) {
411 status
= AE_NOT_EXIST
;
415 /* Invoke table handler if present */
417 if (acpi_gbl_table_handler
) {
418 (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_UNLOAD
,
419 acpi_gbl_root_table_list
.
421 acpi_gbl_table_handler_context
);
425 * Delete all namespace objects owned by this table. Note that
426 * these objects can appear anywhere in the namespace by virtue
427 * of the AML "Scope" operator. Thus, we need to track ownership
428 * by an ID, not simply a position within the hierarchy.
430 status
= acpi_tb_delete_namespace_by_owner(i
);
431 if (ACPI_FAILURE(status
)) {
435 status
= acpi_tb_release_owner_id(i
);
436 acpi_tb_set_table_loaded_flag(i
, FALSE
);
440 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER
);
441 return_ACPI_STATUS(status
);
444 ACPI_EXPORT_SYMBOL(acpi_unload_parent_table
)