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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 - 2016, 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 "actables.h"
47
48#define _COMPONENT ACPI_TABLES
49ACPI_MODULE_NAME("tbinstal")
50
51/* Local prototypes */
52static u8
53acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index);
54
55/*******************************************************************************
56 *
57 * FUNCTION: acpi_tb_compare_tables
58 *
59 * PARAMETERS: table_desc - Table 1 descriptor to be compared
60 * table_index - Index of table 2 to be compared
61 *
62 * RETURN: TRUE if both tables are identical.
63 *
64 * DESCRIPTION: This function compares a table with another table that has
65 * already been installed in the root table list.
66 *
67 ******************************************************************************/
68
69static u8
70acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index)
71{
72 acpi_status status = AE_OK;
73 u8 is_identical;
74 struct acpi_table_header *table;
75 u32 table_length;
76 u8 table_flags;
77
78 status =
79 acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index],
80 &table, &table_length, &table_flags);
81 if (ACPI_FAILURE(status)) {
82 return (FALSE);
83 }
84
85 /*
86 * Check for a table match on the entire table length,
87 * not just the header.
88 */
89 is_identical = (u8)((table_desc->length != table_length ||
90 memcmp(table_desc->pointer, table, table_length)) ?
91 FALSE : TRUE);
92
93 /* Release the acquired table */
94
95 acpi_tb_release_table(table, table_length, table_flags);
96 return (is_identical);
97}
98
99/*******************************************************************************
100 *
101 * FUNCTION: acpi_tb_install_table_with_override
102 *
103 * PARAMETERS: new_table_desc - New table descriptor to install
104 * override - Whether override should be performed
105 * table_index - Where the table index is returned
106 *
107 * RETURN: None
108 *
109 * DESCRIPTION: Install an ACPI table into the global data structure. The
110 * table override mechanism is called to allow the host
111 * OS to replace any table before it is installed in the root
112 * table array.
113 *
114 ******************************************************************************/
115
116void
117acpi_tb_install_table_with_override(struct acpi_table_desc *new_table_desc,
118 u8 override, u32 *table_index)
119{
120 u32 i;
121 acpi_status status;
122
123 status = acpi_tb_get_next_table_descriptor(&i, NULL);
124 if (ACPI_FAILURE(status)) {
125 return;
126 }
127
128 /*
129 * ACPI Table Override:
130 *
131 * Before we install the table, let the host OS override it with a new
132 * one if desired. Any table within the RSDT/XSDT can be replaced,
133 * including the DSDT which is pointed to by the FADT.
134 */
135 if (override) {
136 acpi_tb_override_table(new_table_desc);
137 }
138
139 acpi_tb_init_table_descriptor(&acpi_gbl_root_table_list.tables[i],
140 new_table_desc->address,
141 new_table_desc->flags,
142 new_table_desc->pointer);
143
144 acpi_tb_print_table_header(new_table_desc->address,
145 new_table_desc->pointer);
146
147 /* This synchronizes acpi_gbl_dsdt_index */
148
149 *table_index = i;
150
151 /* Set the global integer width (based upon revision of the DSDT) */
152
153 if (i == acpi_gbl_dsdt_index) {
154 acpi_ut_set_integer_width(new_table_desc->pointer->revision);
155 }
156}
157
158/*******************************************************************************
159 *
160 * FUNCTION: acpi_tb_install_standard_table
161 *
162 * PARAMETERS: address - Address of the table (might be a virtual
163 * address depending on the table_flags)
164 * flags - Flags for the table
165 * reload - Whether reload should be performed
166 * override - Whether override should be performed
167 * table_index - Where the table index is returned
168 *
169 * RETURN: Status
170 *
171 * DESCRIPTION: This function is called to verify and install an ACPI table.
172 * When this function is called by "Load" or "LoadTable" opcodes,
173 * or by acpi_load_table() API, the "Reload" parameter is set.
174 * After sucessfully returning from this function, table is
175 * "INSTALLED" but not "VALIDATED".
176 *
177 ******************************************************************************/
178
179acpi_status
180acpi_tb_install_standard_table(acpi_physical_address address,
181 u8 flags,
182 u8 reload, u8 override, u32 *table_index)
183{
184 u32 i;
185 acpi_status status = AE_OK;
186 struct acpi_table_desc new_table_desc;
187
188 ACPI_FUNCTION_TRACE(tb_install_standard_table);
189
190 /* Acquire a temporary table descriptor for validation */
191
192 status = acpi_tb_acquire_temp_table(&new_table_desc, address, flags);
193 if (ACPI_FAILURE(status)) {
194 ACPI_ERROR((AE_INFO,
195 "Could not acquire table length at %8.8X%8.8X",
196 ACPI_FORMAT_UINT64(address)));
197 return_ACPI_STATUS(status);
198 }
199
200 /*
201 * Optionally do not load any SSDTs from the RSDT/XSDT. This can
202 * be useful for debugging ACPI problems on some machines.
203 */
204 if (!reload &&
205 acpi_gbl_disable_ssdt_table_install &&
206 ACPI_COMPARE_NAME(&new_table_desc.signature, ACPI_SIG_SSDT)) {
207 ACPI_INFO(("Ignoring installation of %4.4s at %8.8X%8.8X",
208 new_table_desc.signature.ascii,
209 ACPI_FORMAT_UINT64(address)));
210 goto release_and_exit;
211 }
212
213 /* Validate and verify a table before installation */
214
215 status = acpi_tb_verify_temp_table(&new_table_desc, NULL);
216 if (ACPI_FAILURE(status)) {
217 goto release_and_exit;
218 }
219
220 /* Acquire the table lock */
221
222 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
223
224 if (reload) {
225 /*
226 * Validate the incoming table signature.
227 *
228 * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
229 * 2) We added support for OEMx tables, signature "OEM".
230 * 3) Valid tables were encountered with a null signature, so we just
231 * gave up on validating the signature, (05/2008).
232 * 4) We encountered non-AML tables such as the MADT, which caused
233 * interpreter errors and kernel faults. So now, we once again allow
234 * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
235 */
236 if ((new_table_desc.signature.ascii[0] != 0x00) &&
237 (!ACPI_COMPARE_NAME
238 (&new_table_desc.signature, ACPI_SIG_SSDT))
239 && (strncmp(new_table_desc.signature.ascii, "OEM", 3))) {
240 ACPI_BIOS_ERROR((AE_INFO,
241 "Table has invalid signature [%4.4s] (0x%8.8X), "
242 "must be SSDT or OEMx",
243 acpi_ut_valid_nameseg(new_table_desc.
244 signature.
245 ascii) ?
246 new_table_desc.signature.
247 ascii : "????",
248 new_table_desc.signature.integer));
249
250 status = AE_BAD_SIGNATURE;
251 goto unlock_and_exit;
252 }
253
254 /* Check if table is already registered */
255
256 for (i = 0; i < acpi_gbl_root_table_list.current_table_count;
257 ++i) {
258 /*
259 * Check for a table match on the entire table length,
260 * not just the header.
261 */
262 if (!acpi_tb_compare_tables(&new_table_desc, i)) {
263 continue;
264 }
265
266 /*
267 * Note: the current mechanism does not unregister a table if it is
268 * dynamically unloaded. The related namespace entries are deleted,
269 * but the table remains in the root table list.
270 *
271 * The assumption here is that the number of different tables that
272 * will be loaded is actually small, and there is minimal overhead
273 * in just keeping the table in case it is needed again.
274 *
275 * If this assumption changes in the future (perhaps on large
276 * machines with many table load/unload operations), tables will
277 * need to be unregistered when they are unloaded, and slots in the
278 * root table list should be reused when empty.
279 */
280 if (acpi_gbl_root_table_list.tables[i].flags &
281 ACPI_TABLE_IS_LOADED) {
282
283 /* Table is still loaded, this is an error */
284
285 status = AE_ALREADY_EXISTS;
286 goto unlock_and_exit;
287 } else {
288 /*
289 * Table was unloaded, allow it to be reloaded.
290 * As we are going to return AE_OK to the caller, we should
291 * take the responsibility of freeing the input descriptor.
292 * Refill the input descriptor to ensure
293 * acpi_tb_install_table_with_override() can be called again to
294 * indicate the re-installation.
295 */
296 acpi_tb_uninstall_table(&new_table_desc);
297 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
298 *table_index = i;
299 return_ACPI_STATUS(AE_OK);
300 }
301 }
302 }
303
304 /* Add the table to the global root table list */
305
306 acpi_tb_install_table_with_override(&new_table_desc, override,
307 table_index);
308
309 /* Invoke table handler if present */
310
311 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
312 if (acpi_gbl_table_handler) {
313 (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_INSTALL,
314 new_table_desc.pointer,
315 acpi_gbl_table_handler_context);
316 }
317 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
318
319unlock_and_exit:
320
321 /* Release the table lock */
322
323 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
324
325release_and_exit:
326
327 /* Release the temporary table descriptor */
328
329 acpi_tb_release_temp_table(&new_table_desc);
330 return_ACPI_STATUS(status);
331}
332
333/*******************************************************************************
334 *
335 * FUNCTION: acpi_tb_override_table
336 *
337 * PARAMETERS: old_table_desc - Validated table descriptor to be
338 * overridden
339 *
340 * RETURN: None
341 *
342 * DESCRIPTION: Attempt table override by calling the OSL override functions.
343 * Note: If the table is overridden, then the entire new table
344 * is acquired and returned by this function.
345 * Before/after invocation, the table descriptor is in a state
346 * that is "VALIDATED".
347 *
348 ******************************************************************************/
349
350void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
351{
352 acpi_status status;
353 char *override_type;
354 struct acpi_table_desc new_table_desc;
355 struct acpi_table_header *table;
356 acpi_physical_address address;
357 u32 length;
358
359 /* (1) Attempt logical override (returns a logical address) */
360
361 status = acpi_os_table_override(old_table_desc->pointer, &table);
362 if (ACPI_SUCCESS(status) && table) {
363 acpi_tb_acquire_temp_table(&new_table_desc,
364 ACPI_PTR_TO_PHYSADDR(table),
365 ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL);
366 override_type = "Logical";
367 goto finish_override;
368 }
369
370 /* (2) Attempt physical override (returns a physical address) */
371
372 status = acpi_os_physical_table_override(old_table_desc->pointer,
373 &address, &length);
374 if (ACPI_SUCCESS(status) && address && length) {
375 acpi_tb_acquire_temp_table(&new_table_desc, address,
376 ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
377 override_type = "Physical";
378 goto finish_override;
379 }
380
381 return; /* There was no override */
382
383finish_override:
384
385 /* Validate and verify a table before overriding */
386
387 status = acpi_tb_verify_temp_table(&new_table_desc, NULL);
388 if (ACPI_FAILURE(status)) {
389 return;
390 }
391
392 ACPI_INFO(("%4.4s 0x%8.8X%8.8X"
393 " %s table override, new table: 0x%8.8X%8.8X",
394 old_table_desc->signature.ascii,
395 ACPI_FORMAT_UINT64(old_table_desc->address),
396 override_type, ACPI_FORMAT_UINT64(new_table_desc.address)));
397
398 /* We can now uninstall the original table */
399
400 acpi_tb_uninstall_table(old_table_desc);
401
402 /*
403 * Replace the original table descriptor and keep its state as
404 * "VALIDATED".
405 */
406 acpi_tb_init_table_descriptor(old_table_desc, new_table_desc.address,
407 new_table_desc.flags,
408 new_table_desc.pointer);
409 acpi_tb_validate_temp_table(old_table_desc);
410
411 /* Release the temporary table descriptor */
412
413 acpi_tb_release_temp_table(&new_table_desc);
414}
415
416/*******************************************************************************
417 *
418 * FUNCTION: acpi_tb_uninstall_table
419 *
420 * PARAMETERS: table_desc - Table descriptor
421 *
422 * RETURN: None
423 *
424 * DESCRIPTION: Delete one internal ACPI table
425 *
426 ******************************************************************************/
427
428void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc)
429{
430
431 ACPI_FUNCTION_TRACE(tb_uninstall_table);
432
433 /* Table must be installed */
434
435 if (!table_desc->address) {
436 return_VOID;
437 }
438
439 acpi_tb_invalidate_table(table_desc);
440
441 if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
442 ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL) {
443 ACPI_FREE(ACPI_PHYSADDR_TO_PTR(table_desc->address));
444 }
445
446 table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL);
447 return_VOID;
448}