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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: tbinstal - ACPI table installation and removal
5 *
6 * Copyright (C) 2000 - 2023, Intel Corp.
7 *
8 *****************************************************************************/
9
10#include <acpi/acpi.h>
11#include "accommon.h"
12#include "actables.h"
13
14#define _COMPONENT ACPI_TABLES
15ACPI_MODULE_NAME("tbinstal")
16
17/*******************************************************************************
18 *
19 * FUNCTION: acpi_tb_install_table_with_override
20 *
21 * PARAMETERS: new_table_desc - New table descriptor to install
22 * override - Whether override should be performed
23 * table_index - Where the table index is returned
24 *
25 * RETURN: None
26 *
27 * DESCRIPTION: Install an ACPI table into the global data structure. The
28 * table override mechanism is called to allow the host
29 * OS to replace any table before it is installed in the root
30 * table array.
31 *
32 ******************************************************************************/
33void
34acpi_tb_install_table_with_override(struct acpi_table_desc *new_table_desc,
35 u8 override, u32 *table_index)
36{
37 u32 i;
38 acpi_status status;
39
40 status = acpi_tb_get_next_table_descriptor(&i, NULL);
41 if (ACPI_FAILURE(status)) {
42 return;
43 }
44
45 /*
46 * ACPI Table Override:
47 *
48 * Before we install the table, let the host OS override it with a new
49 * one if desired. Any table within the RSDT/XSDT can be replaced,
50 * including the DSDT which is pointed to by the FADT.
51 */
52 if (override) {
53 acpi_tb_override_table(new_table_desc);
54 }
55
56 acpi_tb_init_table_descriptor(&acpi_gbl_root_table_list.tables[i],
57 new_table_desc->address,
58 new_table_desc->flags,
59 new_table_desc->pointer);
60
61 acpi_tb_print_table_header(new_table_desc->address,
62 new_table_desc->pointer);
63
64 /* This synchronizes acpi_gbl_dsdt_index */
65
66 *table_index = i;
67
68 /* Set the global integer width (based upon revision of the DSDT) */
69
70 if (i == acpi_gbl_dsdt_index) {
71 acpi_ut_set_integer_width(new_table_desc->pointer->revision);
72 }
73}
74
75/*******************************************************************************
76 *
77 * FUNCTION: acpi_tb_install_standard_table
78 *
79 * PARAMETERS: address - Address of the table (might be a virtual
80 * address depending on the table_flags)
81 * flags - Flags for the table
82 * table - Pointer to the table (required for virtual
83 * origins, optional for physical)
84 * reload - Whether reload should be performed
85 * override - Whether override should be performed
86 * table_index - Where the table index is returned
87 *
88 * RETURN: Status
89 *
90 * DESCRIPTION: This function is called to verify and install an ACPI table.
91 * When this function is called by "Load" or "LoadTable" opcodes,
92 * or by acpi_load_table() API, the "Reload" parameter is set.
93 * After successfully returning from this function, table is
94 * "INSTALLED" but not "VALIDATED".
95 *
96 ******************************************************************************/
97
98acpi_status
99acpi_tb_install_standard_table(acpi_physical_address address,
100 u8 flags,
101 struct acpi_table_header *table,
102 u8 reload, u8 override, u32 *table_index)
103{
104 u32 i;
105 acpi_status status = AE_OK;
106 struct acpi_table_desc new_table_desc;
107
108 ACPI_FUNCTION_TRACE(tb_install_standard_table);
109
110 /* Acquire a temporary table descriptor for validation */
111
112 status =
113 acpi_tb_acquire_temp_table(&new_table_desc, address, flags, table);
114 if (ACPI_FAILURE(status)) {
115 ACPI_ERROR((AE_INFO,
116 "Could not acquire table length at %8.8X%8.8X",
117 ACPI_FORMAT_UINT64(address)));
118 return_ACPI_STATUS(status);
119 }
120
121 /*
122 * Optionally do not load any SSDTs from the RSDT/XSDT. This can
123 * be useful for debugging ACPI problems on some machines.
124 */
125 if (!reload &&
126 acpi_gbl_disable_ssdt_table_install &&
127 ACPI_COMPARE_NAMESEG(&new_table_desc.signature, ACPI_SIG_SSDT)) {
128 ACPI_INFO(("Ignoring installation of %4.4s at %8.8X%8.8X",
129 new_table_desc.signature.ascii,
130 ACPI_FORMAT_UINT64(address)));
131 goto release_and_exit;
132 }
133
134 /* Acquire the table lock */
135
136 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
137
138 /* Validate and verify a table before installation */
139
140 status = acpi_tb_verify_temp_table(&new_table_desc, NULL, &i);
141 if (ACPI_FAILURE(status)) {
142 if (status == AE_CTRL_TERMINATE) {
143 /*
144 * Table was unloaded, allow it to be reloaded.
145 * As we are going to return AE_OK to the caller, we should
146 * take the responsibility of freeing the input descriptor.
147 * Refill the input descriptor to ensure
148 * acpi_tb_install_table_with_override() can be called again to
149 * indicate the re-installation.
150 */
151 acpi_tb_uninstall_table(&new_table_desc);
152 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
153 *table_index = i;
154 return_ACPI_STATUS(AE_OK);
155 }
156 goto unlock_and_exit;
157 }
158
159 /* Add the table to the global root table list */
160
161 acpi_tb_install_table_with_override(&new_table_desc, override,
162 table_index);
163
164 /* Invoke table handler */
165
166 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
167 acpi_tb_notify_table(ACPI_TABLE_EVENT_INSTALL, new_table_desc.pointer);
168 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
169
170unlock_and_exit:
171
172 /* Release the table lock */
173
174 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
175
176release_and_exit:
177
178 /* Release the temporary table descriptor */
179
180 acpi_tb_release_temp_table(&new_table_desc);
181 return_ACPI_STATUS(status);
182}
183
184/*******************************************************************************
185 *
186 * FUNCTION: acpi_tb_override_table
187 *
188 * PARAMETERS: old_table_desc - Validated table descriptor to be
189 * overridden
190 *
191 * RETURN: None
192 *
193 * DESCRIPTION: Attempt table override by calling the OSL override functions.
194 * Note: If the table is overridden, then the entire new table
195 * is acquired and returned by this function.
196 * Before/after invocation, the table descriptor is in a state
197 * that is "VALIDATED".
198 *
199 ******************************************************************************/
200
201void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
202{
203 acpi_status status;
204 struct acpi_table_desc new_table_desc;
205 struct acpi_table_header *table;
206 acpi_physical_address address;
207 u32 length;
208 ACPI_ERROR_ONLY(char *override_type);
209
210 /* (1) Attempt logical override (returns a logical address) */
211
212 status = acpi_os_table_override(old_table_desc->pointer, &table);
213 if (ACPI_SUCCESS(status) && table) {
214 acpi_tb_acquire_temp_table(&new_table_desc,
215 ACPI_PTR_TO_PHYSADDR(table),
216 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL,
217 table);
218 ACPI_ERROR_ONLY(override_type = "Logical");
219 goto finish_override;
220 }
221
222 /* (2) Attempt physical override (returns a physical address) */
223
224 status = acpi_os_physical_table_override(old_table_desc->pointer,
225 &address, &length);
226 if (ACPI_SUCCESS(status) && address && length) {
227 acpi_tb_acquire_temp_table(&new_table_desc, address,
228 ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,
229 NULL);
230 ACPI_ERROR_ONLY(override_type = "Physical");
231 goto finish_override;
232 }
233
234 return; /* There was no override */
235
236finish_override:
237
238 /*
239 * Validate and verify a table before overriding, no nested table
240 * duplication check as it's too complicated and unnecessary.
241 */
242 status = acpi_tb_verify_temp_table(&new_table_desc, NULL, NULL);
243 if (ACPI_FAILURE(status)) {
244 return;
245 }
246
247 ACPI_INFO(("%4.4s 0x%8.8X%8.8X"
248 " %s table override, new table: 0x%8.8X%8.8X",
249 old_table_desc->signature.ascii,
250 ACPI_FORMAT_UINT64(old_table_desc->address),
251 override_type, ACPI_FORMAT_UINT64(new_table_desc.address)));
252
253 /* We can now uninstall the original table */
254
255 acpi_tb_uninstall_table(old_table_desc);
256
257 /*
258 * Replace the original table descriptor and keep its state as
259 * "VALIDATED".
260 */
261 acpi_tb_init_table_descriptor(old_table_desc, new_table_desc.address,
262 new_table_desc.flags,
263 new_table_desc.pointer);
264 acpi_tb_validate_temp_table(old_table_desc);
265
266 /* Release the temporary table descriptor */
267
268 acpi_tb_release_temp_table(&new_table_desc);
269}
270
271/*******************************************************************************
272 *
273 * FUNCTION: acpi_tb_uninstall_table
274 *
275 * PARAMETERS: table_desc - Table descriptor
276 *
277 * RETURN: None
278 *
279 * DESCRIPTION: Delete one internal ACPI table
280 *
281 ******************************************************************************/
282
283void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc)
284{
285
286 ACPI_FUNCTION_TRACE(tb_uninstall_table);
287
288 /* Table must be installed */
289
290 if (!table_desc->address) {
291 return_VOID;
292 }
293
294 acpi_tb_invalidate_table(table_desc);
295
296 if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
297 ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL) {
298 ACPI_FREE(table_desc->pointer);
299 table_desc->pointer = NULL;
300 }
301
302 table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL);
303 return_VOID;
304}
1/******************************************************************************
2 *
3 * Module Name: tbinstal - ACPI table installation and removal
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
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
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acnamesp.h"
47#include "actables.h"
48
49#define _COMPONENT ACPI_TABLES
50ACPI_MODULE_NAME("tbinstal")
51
52/******************************************************************************
53 *
54 * FUNCTION: acpi_tb_verify_table
55 *
56 * PARAMETERS: table_desc - table
57 *
58 * RETURN: Status
59 *
60 * DESCRIPTION: this function is called to verify and map table
61 *
62 *****************************************************************************/
63acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
64{
65 acpi_status status = AE_OK;
66
67 ACPI_FUNCTION_TRACE(tb_verify_table);
68
69 /* Map the table if necessary */
70
71 if (!table_desc->pointer) {
72 if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
73 ACPI_TABLE_ORIGIN_MAPPED) {
74 table_desc->pointer =
75 acpi_os_map_memory(table_desc->address,
76 table_desc->length);
77 }
78 if (!table_desc->pointer) {
79 return_ACPI_STATUS(AE_NO_MEMORY);
80 }
81 }
82
83 /* FACS is the odd table, has no standard ACPI header and no checksum */
84
85 if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) {
86
87 /* Always calculate checksum, ignore bad checksum if requested */
88
89 status =
90 acpi_tb_verify_checksum(table_desc->pointer,
91 table_desc->length);
92 }
93
94 return_ACPI_STATUS(status);
95}
96
97/*******************************************************************************
98 *
99 * FUNCTION: acpi_tb_add_table
100 *
101 * PARAMETERS: table_desc - Table descriptor
102 * table_index - Where the table index is returned
103 *
104 * RETURN: Status
105 *
106 * DESCRIPTION: This function is called to add an ACPI table. It is used to
107 * dynamically load tables via the Load and load_table AML
108 * operators.
109 *
110 ******************************************************************************/
111
112acpi_status
113acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
114{
115 u32 i;
116 acpi_status status = AE_OK;
117
118 ACPI_FUNCTION_TRACE(tb_add_table);
119
120 if (!table_desc->pointer) {
121 status = acpi_tb_verify_table(table_desc);
122 if (ACPI_FAILURE(status) || !table_desc->pointer) {
123 return_ACPI_STATUS(status);
124 }
125 }
126
127 /*
128 * Validate the incoming table signature.
129 *
130 * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
131 * 2) We added support for OEMx tables, signature "OEM".
132 * 3) Valid tables were encountered with a null signature, so we just
133 * gave up on validating the signature, (05/2008).
134 * 4) We encountered non-AML tables such as the MADT, which caused
135 * interpreter errors and kernel faults. So now, we once again allow
136 * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
137 */
138 if ((table_desc->pointer->signature[0] != 0x00) &&
139 (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
140 && (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
141 ACPI_ERROR((AE_INFO,
142 "Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx",
143 acpi_ut_valid_acpi_name(*(u32 *)table_desc->
144 pointer->
145 signature) ? table_desc->
146 pointer->signature : "????",
147 *(u32 *)table_desc->pointer->signature));
148
149 return_ACPI_STATUS(AE_BAD_SIGNATURE);
150 }
151
152 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
153
154 /* Check if table is already registered */
155
156 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
157 if (!acpi_gbl_root_table_list.tables[i].pointer) {
158 status =
159 acpi_tb_verify_table(&acpi_gbl_root_table_list.
160 tables[i]);
161 if (ACPI_FAILURE(status)
162 || !acpi_gbl_root_table_list.tables[i].pointer) {
163 continue;
164 }
165 }
166
167 /*
168 * Check for a table match on the entire table length,
169 * not just the header.
170 */
171 if (table_desc->length !=
172 acpi_gbl_root_table_list.tables[i].length) {
173 continue;
174 }
175
176 if (ACPI_MEMCMP(table_desc->pointer,
177 acpi_gbl_root_table_list.tables[i].pointer,
178 acpi_gbl_root_table_list.tables[i].length)) {
179 continue;
180 }
181
182 /*
183 * Note: the current mechanism does not unregister a table if it is
184 * dynamically unloaded. The related namespace entries are deleted,
185 * but the table remains in the root table list.
186 *
187 * The assumption here is that the number of different tables that
188 * will be loaded is actually small, and there is minimal overhead
189 * in just keeping the table in case it is needed again.
190 *
191 * If this assumption changes in the future (perhaps on large
192 * machines with many table load/unload operations), tables will
193 * need to be unregistered when they are unloaded, and slots in the
194 * root table list should be reused when empty.
195 */
196
197 /*
198 * Table is already registered.
199 * We can delete the table that was passed as a parameter.
200 */
201 acpi_tb_delete_table(table_desc);
202 *table_index = i;
203
204 if (acpi_gbl_root_table_list.tables[i].
205 flags & ACPI_TABLE_IS_LOADED) {
206
207 /* Table is still loaded, this is an error */
208
209 status = AE_ALREADY_EXISTS;
210 goto release;
211 } else {
212 /* Table was unloaded, allow it to be reloaded */
213
214 table_desc->pointer =
215 acpi_gbl_root_table_list.tables[i].pointer;
216 table_desc->address =
217 acpi_gbl_root_table_list.tables[i].address;
218 status = AE_OK;
219 goto print_header;
220 }
221 }
222
223 /*
224 * ACPI Table Override:
225 * Allow the host to override dynamically loaded tables.
226 * NOTE: the table is fully mapped at this point, and the mapping will
227 * be deleted by tb_table_override if the table is actually overridden.
228 */
229 (void)acpi_tb_table_override(table_desc->pointer, table_desc);
230
231 /* Add the table to the global root table list */
232
233 status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
234 table_desc->length, table_desc->flags,
235 table_index);
236 if (ACPI_FAILURE(status)) {
237 goto release;
238 }
239
240 print_header:
241 acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
242
243 release:
244 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
245 return_ACPI_STATUS(status);
246}
247
248/*******************************************************************************
249 *
250 * FUNCTION: acpi_tb_table_override
251 *
252 * PARAMETERS: table_header - Header for the original table
253 * table_desc - Table descriptor initialized for the
254 * original table. May or may not be mapped.
255 *
256 * RETURN: Pointer to the entire new table. NULL if table not overridden.
257 * If overridden, installs the new table within the input table
258 * descriptor.
259 *
260 * DESCRIPTION: Attempt table override by calling the OSL override functions.
261 * Note: If the table is overridden, then the entire new table
262 * is mapped and returned by this function.
263 *
264 ******************************************************************************/
265
266struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header
267 *table_header,
268 struct acpi_table_desc
269 *table_desc)
270{
271 acpi_status status;
272 struct acpi_table_header *new_table = NULL;
273 acpi_physical_address new_address = 0;
274 u32 new_table_length = 0;
275 u8 new_flags;
276 char *override_type;
277
278 /* (1) Attempt logical override (returns a logical address) */
279
280 status = acpi_os_table_override(table_header, &new_table);
281 if (ACPI_SUCCESS(status) && new_table) {
282 new_address = ACPI_PTR_TO_PHYSADDR(new_table);
283 new_table_length = new_table->length;
284 new_flags = ACPI_TABLE_ORIGIN_OVERRIDE;
285 override_type = "Logical";
286 goto finish_override;
287 }
288
289 /* (2) Attempt physical override (returns a physical address) */
290
291 status = acpi_os_physical_table_override(table_header,
292 &new_address,
293 &new_table_length);
294 if (ACPI_SUCCESS(status) && new_address && new_table_length) {
295
296 /* Map the entire new table */
297
298 new_table = acpi_os_map_memory(new_address, new_table_length);
299 if (!new_table) {
300 ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
301 "%4.4s %p Attempted physical table override failed",
302 table_header->signature,
303 ACPI_CAST_PTR(void,
304 table_desc->address)));
305 return (NULL);
306 }
307
308 override_type = "Physical";
309 new_flags = ACPI_TABLE_ORIGIN_MAPPED;
310 goto finish_override;
311 }
312
313 return (NULL); /* There was no override */
314
315 finish_override:
316
317 ACPI_INFO((AE_INFO,
318 "%4.4s %p %s table override, new table: %p",
319 table_header->signature,
320 ACPI_CAST_PTR(void, table_desc->address),
321 override_type, new_table));
322
323 /* We can now unmap/delete the original table (if fully mapped) */
324
325 acpi_tb_delete_table(table_desc);
326
327 /* Setup descriptor for the new table */
328
329 table_desc->address = new_address;
330 table_desc->pointer = new_table;
331 table_desc->length = new_table_length;
332 table_desc->flags = new_flags;
333
334 return (new_table);
335}
336
337/*******************************************************************************
338 *
339 * FUNCTION: acpi_tb_resize_root_table_list
340 *
341 * PARAMETERS: None
342 *
343 * RETURN: Status
344 *
345 * DESCRIPTION: Expand the size of global table array
346 *
347 ******************************************************************************/
348
349acpi_status acpi_tb_resize_root_table_list(void)
350{
351 struct acpi_table_desc *tables;
352
353 ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
354
355 /* allow_resize flag is a parameter to acpi_initialize_tables */
356
357 if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
358 ACPI_ERROR((AE_INFO,
359 "Resize of Root Table Array is not allowed"));
360 return_ACPI_STATUS(AE_SUPPORT);
361 }
362
363 /* Increase the Table Array size */
364
365 tables = ACPI_ALLOCATE_ZEROED(((acpi_size) acpi_gbl_root_table_list.
366 max_table_count +
367 ACPI_ROOT_TABLE_SIZE_INCREMENT) *
368 sizeof(struct acpi_table_desc));
369 if (!tables) {
370 ACPI_ERROR((AE_INFO,
371 "Could not allocate new root table array"));
372 return_ACPI_STATUS(AE_NO_MEMORY);
373 }
374
375 /* Copy and free the previous table array */
376
377 if (acpi_gbl_root_table_list.tables) {
378 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
379 (acpi_size) acpi_gbl_root_table_list.
380 max_table_count * sizeof(struct acpi_table_desc));
381
382 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
383 ACPI_FREE(acpi_gbl_root_table_list.tables);
384 }
385 }
386
387 acpi_gbl_root_table_list.tables = tables;
388 acpi_gbl_root_table_list.max_table_count +=
389 ACPI_ROOT_TABLE_SIZE_INCREMENT;
390 acpi_gbl_root_table_list.flags |= (u8)ACPI_ROOT_ORIGIN_ALLOCATED;
391
392 return_ACPI_STATUS(AE_OK);
393}
394
395/*******************************************************************************
396 *
397 * FUNCTION: acpi_tb_store_table
398 *
399 * PARAMETERS: Address - Table address
400 * Table - Table header
401 * Length - Table length
402 * Flags - flags
403 *
404 * RETURN: Status and table index.
405 *
406 * DESCRIPTION: Add an ACPI table to the global table list
407 *
408 ******************************************************************************/
409
410acpi_status
411acpi_tb_store_table(acpi_physical_address address,
412 struct acpi_table_header *table,
413 u32 length, u8 flags, u32 *table_index)
414{
415 acpi_status status;
416 struct acpi_table_desc *new_table;
417
418 /* Ensure that there is room for the table in the Root Table List */
419
420 if (acpi_gbl_root_table_list.current_table_count >=
421 acpi_gbl_root_table_list.max_table_count) {
422 status = acpi_tb_resize_root_table_list();
423 if (ACPI_FAILURE(status)) {
424 return (status);
425 }
426 }
427
428 new_table =
429 &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
430 current_table_count];
431
432 /* Initialize added table */
433
434 new_table->address = address;
435 new_table->pointer = table;
436 new_table->length = length;
437 new_table->owner_id = 0;
438 new_table->flags = flags;
439
440 ACPI_MOVE_32_TO_32(&new_table->signature, table->signature);
441
442 *table_index = acpi_gbl_root_table_list.current_table_count;
443 acpi_gbl_root_table_list.current_table_count++;
444 return (AE_OK);
445}
446
447/*******************************************************************************
448 *
449 * FUNCTION: acpi_tb_delete_table
450 *
451 * PARAMETERS: table_index - Table index
452 *
453 * RETURN: None
454 *
455 * DESCRIPTION: Delete one internal ACPI table
456 *
457 ******************************************************************************/
458
459void acpi_tb_delete_table(struct acpi_table_desc *table_desc)
460{
461 /* Table must be mapped or allocated */
462 if (!table_desc->pointer) {
463 return;
464 }
465 switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
466 case ACPI_TABLE_ORIGIN_MAPPED:
467 acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
468 break;
469 case ACPI_TABLE_ORIGIN_ALLOCATED:
470 ACPI_FREE(table_desc->pointer);
471 break;
472
473 /* Not mapped or allocated, there is nothing we can do */
474
475 default:
476 return;
477 }
478
479 table_desc->pointer = NULL;
480}
481
482/*******************************************************************************
483 *
484 * FUNCTION: acpi_tb_terminate
485 *
486 * PARAMETERS: None
487 *
488 * RETURN: None
489 *
490 * DESCRIPTION: Delete all internal ACPI tables
491 *
492 ******************************************************************************/
493
494void acpi_tb_terminate(void)
495{
496 u32 i;
497
498 ACPI_FUNCTION_TRACE(tb_terminate);
499
500 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
501
502 /* Delete the individual tables */
503
504 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
505 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
506 }
507
508 /*
509 * Delete the root table array if allocated locally. Array cannot be
510 * mapped, so we don't need to check for that flag.
511 */
512 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
513 ACPI_FREE(acpi_gbl_root_table_list.tables);
514 }
515
516 acpi_gbl_root_table_list.tables = NULL;
517 acpi_gbl_root_table_list.flags = 0;
518 acpi_gbl_root_table_list.current_table_count = 0;
519
520 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
521 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
522}
523
524/*******************************************************************************
525 *
526 * FUNCTION: acpi_tb_delete_namespace_by_owner
527 *
528 * PARAMETERS: table_index - Table index
529 *
530 * RETURN: Status
531 *
532 * DESCRIPTION: Delete all namespace objects created when this table was loaded.
533 *
534 ******************************************************************************/
535
536acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
537{
538 acpi_owner_id owner_id;
539 acpi_status status;
540
541 ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
542
543 status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
544 if (ACPI_FAILURE(status)) {
545 return_ACPI_STATUS(status);
546 }
547
548 if (table_index >= acpi_gbl_root_table_list.current_table_count) {
549
550 /* The table index does not exist */
551
552 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
553 return_ACPI_STATUS(AE_NOT_EXIST);
554 }
555
556 /* Get the owner ID for this table, used to delete namespace nodes */
557
558 owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
559 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
560
561 /*
562 * Need to acquire the namespace writer lock to prevent interference
563 * with any concurrent namespace walks. The interpreter must be
564 * released during the deletion since the acquisition of the deletion
565 * lock may block, and also since the execution of a namespace walk
566 * must be allowed to use the interpreter.
567 */
568 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
569 status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
570
571 acpi_ns_delete_namespace_by_owner(owner_id);
572 if (ACPI_FAILURE(status)) {
573 return_ACPI_STATUS(status);
574 }
575
576 acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
577
578 status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
579 return_ACPI_STATUS(status);
580}
581
582/*******************************************************************************
583 *
584 * FUNCTION: acpi_tb_allocate_owner_id
585 *
586 * PARAMETERS: table_index - Table index
587 *
588 * RETURN: Status
589 *
590 * DESCRIPTION: Allocates owner_id in table_desc
591 *
592 ******************************************************************************/
593
594acpi_status acpi_tb_allocate_owner_id(u32 table_index)
595{
596 acpi_status status = AE_BAD_PARAMETER;
597
598 ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
599
600 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
601 if (table_index < acpi_gbl_root_table_list.current_table_count) {
602 status = acpi_ut_allocate_owner_id
603 (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
604 }
605
606 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
607 return_ACPI_STATUS(status);
608}
609
610/*******************************************************************************
611 *
612 * FUNCTION: acpi_tb_release_owner_id
613 *
614 * PARAMETERS: table_index - Table index
615 *
616 * RETURN: Status
617 *
618 * DESCRIPTION: Releases owner_id in table_desc
619 *
620 ******************************************************************************/
621
622acpi_status acpi_tb_release_owner_id(u32 table_index)
623{
624 acpi_status status = AE_BAD_PARAMETER;
625
626 ACPI_FUNCTION_TRACE(tb_release_owner_id);
627
628 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
629 if (table_index < acpi_gbl_root_table_list.current_table_count) {
630 acpi_ut_release_owner_id(&
631 (acpi_gbl_root_table_list.
632 tables[table_index].owner_id));
633 status = AE_OK;
634 }
635
636 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
637 return_ACPI_STATUS(status);
638}
639
640/*******************************************************************************
641 *
642 * FUNCTION: acpi_tb_get_owner_id
643 *
644 * PARAMETERS: table_index - Table index
645 * owner_id - Where the table owner_id is returned
646 *
647 * RETURN: Status
648 *
649 * DESCRIPTION: returns owner_id for the ACPI table
650 *
651 ******************************************************************************/
652
653acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
654{
655 acpi_status status = AE_BAD_PARAMETER;
656
657 ACPI_FUNCTION_TRACE(tb_get_owner_id);
658
659 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
660 if (table_index < acpi_gbl_root_table_list.current_table_count) {
661 *owner_id =
662 acpi_gbl_root_table_list.tables[table_index].owner_id;
663 status = AE_OK;
664 }
665
666 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
667 return_ACPI_STATUS(status);
668}
669
670/*******************************************************************************
671 *
672 * FUNCTION: acpi_tb_is_table_loaded
673 *
674 * PARAMETERS: table_index - Table index
675 *
676 * RETURN: Table Loaded Flag
677 *
678 ******************************************************************************/
679
680u8 acpi_tb_is_table_loaded(u32 table_index)
681{
682 u8 is_loaded = FALSE;
683
684 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
685 if (table_index < acpi_gbl_root_table_list.current_table_count) {
686 is_loaded = (u8)
687 (acpi_gbl_root_table_list.tables[table_index].flags &
688 ACPI_TABLE_IS_LOADED);
689 }
690
691 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
692 return (is_loaded);
693}
694
695/*******************************************************************************
696 *
697 * FUNCTION: acpi_tb_set_table_loaded_flag
698 *
699 * PARAMETERS: table_index - Table index
700 * is_loaded - TRUE if table is loaded, FALSE otherwise
701 *
702 * RETURN: None
703 *
704 * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
705 *
706 ******************************************************************************/
707
708void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
709{
710
711 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
712 if (table_index < acpi_gbl_root_table_list.current_table_count) {
713 if (is_loaded) {
714 acpi_gbl_root_table_list.tables[table_index].flags |=
715 ACPI_TABLE_IS_LOADED;
716 } else {
717 acpi_gbl_root_table_list.tables[table_index].flags &=
718 ~ACPI_TABLE_IS_LOADED;
719 }
720 }
721
722 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
723}