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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 - 2014, 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 /* Always calculate checksum, ignore bad checksum if requested */
84
85 status =
86 acpi_tb_verify_checksum(table_desc->pointer, table_desc->length);
87
88 return_ACPI_STATUS(status);
89}
90
91/*******************************************************************************
92 *
93 * FUNCTION: acpi_tb_add_table
94 *
95 * PARAMETERS: table_desc - Table descriptor
96 * table_index - Where the table index is returned
97 *
98 * RETURN: Status
99 *
100 * DESCRIPTION: This function is called to add an ACPI table. It is used to
101 * dynamically load tables via the Load and load_table AML
102 * operators.
103 *
104 ******************************************************************************/
105
106acpi_status
107acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
108{
109 u32 i;
110 acpi_status status = AE_OK;
111
112 ACPI_FUNCTION_TRACE(tb_add_table);
113
114 if (!table_desc->pointer) {
115 status = acpi_tb_verify_table(table_desc);
116 if (ACPI_FAILURE(status) || !table_desc->pointer) {
117 return_ACPI_STATUS(status);
118 }
119 }
120
121 /*
122 * Validate the incoming table signature.
123 *
124 * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
125 * 2) We added support for OEMx tables, signature "OEM".
126 * 3) Valid tables were encountered with a null signature, so we just
127 * gave up on validating the signature, (05/2008).
128 * 4) We encountered non-AML tables such as the MADT, which caused
129 * interpreter errors and kernel faults. So now, we once again allow
130 * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
131 */
132 if ((table_desc->pointer->signature[0] != 0x00) &&
133 (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
134 && (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
135 ACPI_BIOS_ERROR((AE_INFO,
136 "Table has invalid signature [%4.4s] (0x%8.8X), "
137 "must be SSDT or OEMx",
138 acpi_ut_valid_acpi_name(table_desc->pointer->
139 signature) ?
140 table_desc->pointer->signature : "????",
141 *(u32 *)table_desc->pointer->signature));
142
143 return_ACPI_STATUS(AE_BAD_SIGNATURE);
144 }
145
146 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
147
148 /* Check if table is already registered */
149
150 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
151 if (!acpi_gbl_root_table_list.tables[i].pointer) {
152 status =
153 acpi_tb_verify_table(&acpi_gbl_root_table_list.
154 tables[i]);
155 if (ACPI_FAILURE(status)
156 || !acpi_gbl_root_table_list.tables[i].pointer) {
157 continue;
158 }
159 }
160
161 /*
162 * Check for a table match on the entire table length,
163 * not just the header.
164 */
165 if (table_desc->length !=
166 acpi_gbl_root_table_list.tables[i].length) {
167 continue;
168 }
169
170 if (ACPI_MEMCMP(table_desc->pointer,
171 acpi_gbl_root_table_list.tables[i].pointer,
172 acpi_gbl_root_table_list.tables[i].length)) {
173 continue;
174 }
175
176 /*
177 * Note: the current mechanism does not unregister a table if it is
178 * dynamically unloaded. The related namespace entries are deleted,
179 * but the table remains in the root table list.
180 *
181 * The assumption here is that the number of different tables that
182 * will be loaded is actually small, and there is minimal overhead
183 * in just keeping the table in case it is needed again.
184 *
185 * If this assumption changes in the future (perhaps on large
186 * machines with many table load/unload operations), tables will
187 * need to be unregistered when they are unloaded, and slots in the
188 * root table list should be reused when empty.
189 */
190
191 /*
192 * Table is already registered.
193 * We can delete the table that was passed as a parameter.
194 */
195 acpi_tb_delete_table(table_desc);
196 *table_index = i;
197
198 if (acpi_gbl_root_table_list.tables[i].
199 flags & ACPI_TABLE_IS_LOADED) {
200
201 /* Table is still loaded, this is an error */
202
203 status = AE_ALREADY_EXISTS;
204 goto release;
205 } else {
206 /* Table was unloaded, allow it to be reloaded */
207
208 table_desc->pointer =
209 acpi_gbl_root_table_list.tables[i].pointer;
210 table_desc->address =
211 acpi_gbl_root_table_list.tables[i].address;
212 status = AE_OK;
213 goto print_header;
214 }
215 }
216
217 /*
218 * ACPI Table Override:
219 * Allow the host to override dynamically loaded tables.
220 * NOTE: the table is fully mapped at this point, and the mapping will
221 * be deleted by tb_table_override if the table is actually overridden.
222 */
223 (void)acpi_tb_table_override(table_desc->pointer, table_desc);
224
225 /* Add the table to the global root table list */
226
227 status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
228 table_desc->length, table_desc->flags,
229 table_index);
230 if (ACPI_FAILURE(status)) {
231 goto release;
232 }
233
234print_header:
235 acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
236
237release:
238 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
239 return_ACPI_STATUS(status);
240}
241
242/*******************************************************************************
243 *
244 * FUNCTION: acpi_tb_table_override
245 *
246 * PARAMETERS: table_header - Header for the original table
247 * table_desc - Table descriptor initialized for the
248 * original table. May or may not be mapped.
249 *
250 * RETURN: Pointer to the entire new table. NULL if table not overridden.
251 * If overridden, installs the new table within the input table
252 * descriptor.
253 *
254 * DESCRIPTION: Attempt table override by calling the OSL override functions.
255 * Note: If the table is overridden, then the entire new table
256 * is mapped and returned by this function.
257 *
258 ******************************************************************************/
259
260struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header
261 *table_header,
262 struct acpi_table_desc
263 *table_desc)
264{
265 acpi_status status;
266 struct acpi_table_header *new_table = NULL;
267 acpi_physical_address new_address = 0;
268 u32 new_table_length = 0;
269 u8 new_flags;
270 char *override_type;
271
272 /* (1) Attempt logical override (returns a logical address) */
273
274 status = acpi_os_table_override(table_header, &new_table);
275 if (ACPI_SUCCESS(status) && new_table) {
276 new_address = ACPI_PTR_TO_PHYSADDR(new_table);
277 new_table_length = new_table->length;
278 new_flags = ACPI_TABLE_ORIGIN_OVERRIDE;
279 override_type = "Logical";
280 goto finish_override;
281 }
282
283 /* (2) Attempt physical override (returns a physical address) */
284
285 status = acpi_os_physical_table_override(table_header,
286 &new_address,
287 &new_table_length);
288 if (ACPI_SUCCESS(status) && new_address && new_table_length) {
289
290 /* Map the entire new table */
291
292 new_table = acpi_os_map_memory(new_address, new_table_length);
293 if (!new_table) {
294 ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
295 "%4.4s " ACPI_PRINTF_UINT
296 " Attempted physical table override failed",
297 table_header->signature,
298 ACPI_FORMAT_TO_UINT(table_desc->
299 address)));
300 return (NULL);
301 }
302
303 override_type = "Physical";
304 new_flags = ACPI_TABLE_ORIGIN_MAPPED;
305 goto finish_override;
306 }
307
308 return (NULL); /* There was no override */
309
310finish_override:
311
312 ACPI_INFO((AE_INFO, "%4.4s " ACPI_PRINTF_UINT
313 " %s table override, new table: " ACPI_PRINTF_UINT,
314 table_header->signature,
315 ACPI_FORMAT_TO_UINT(table_desc->address),
316 override_type, ACPI_FORMAT_TO_UINT(new_table)));
317
318 /* We can now unmap/delete the original table (if fully mapped) */
319
320 acpi_tb_delete_table(table_desc);
321
322 /* Setup descriptor for the new table */
323
324 table_desc->address = new_address;
325 table_desc->pointer = new_table;
326 table_desc->length = new_table_length;
327 table_desc->flags = new_flags;
328
329 return (new_table);
330}
331
332/*******************************************************************************
333 *
334 * FUNCTION: acpi_tb_resize_root_table_list
335 *
336 * PARAMETERS: None
337 *
338 * RETURN: Status
339 *
340 * DESCRIPTION: Expand the size of global table array
341 *
342 ******************************************************************************/
343
344acpi_status acpi_tb_resize_root_table_list(void)
345{
346 struct acpi_table_desc *tables;
347 u32 table_count;
348
349 ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
350
351 /* allow_resize flag is a parameter to acpi_initialize_tables */
352
353 if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
354 ACPI_ERROR((AE_INFO,
355 "Resize of Root Table Array is not allowed"));
356 return_ACPI_STATUS(AE_SUPPORT);
357 }
358
359 /* Increase the Table Array size */
360
361 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
362 table_count = acpi_gbl_root_table_list.max_table_count;
363 } else {
364 table_count = acpi_gbl_root_table_list.current_table_count;
365 }
366
367 tables = ACPI_ALLOCATE_ZEROED(((acpi_size) table_count +
368 ACPI_ROOT_TABLE_SIZE_INCREMENT) *
369 sizeof(struct acpi_table_desc));
370 if (!tables) {
371 ACPI_ERROR((AE_INFO,
372 "Could not allocate new root table array"));
373 return_ACPI_STATUS(AE_NO_MEMORY);
374 }
375
376 /* Copy and free the previous table array */
377
378 if (acpi_gbl_root_table_list.tables) {
379 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
380 (acpi_size) table_count *
381 sizeof(struct acpi_table_desc));
382
383 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
384 ACPI_FREE(acpi_gbl_root_table_list.tables);
385 }
386 }
387
388 acpi_gbl_root_table_list.tables = tables;
389 acpi_gbl_root_table_list.max_table_count =
390 table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
391 acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;
392
393 return_ACPI_STATUS(AE_OK);
394}
395
396/*******************************************************************************
397 *
398 * FUNCTION: acpi_tb_store_table
399 *
400 * PARAMETERS: address - Table address
401 * table - Table header
402 * length - Table length
403 * flags - flags
404 *
405 * RETURN: Status and table index.
406 *
407 * DESCRIPTION: Add an ACPI table to the global table list
408 *
409 ******************************************************************************/
410
411acpi_status
412acpi_tb_store_table(acpi_physical_address address,
413 struct acpi_table_header *table,
414 u32 length, u8 flags, u32 *table_index)
415{
416 acpi_status status;
417 struct acpi_table_desc *new_table;
418
419 /* Ensure that there is room for the table in the Root Table List */
420
421 if (acpi_gbl_root_table_list.current_table_count >=
422 acpi_gbl_root_table_list.max_table_count) {
423 status = acpi_tb_resize_root_table_list();
424 if (ACPI_FAILURE(status)) {
425 return (status);
426 }
427 }
428
429 new_table =
430 &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
431 current_table_count];
432
433 /* Initialize added table */
434
435 new_table->address = address;
436 new_table->pointer = table;
437 new_table->length = length;
438 new_table->owner_id = 0;
439 new_table->flags = flags;
440
441 ACPI_MOVE_32_TO_32(&new_table->signature, table->signature);
442
443 *table_index = acpi_gbl_root_table_list.current_table_count;
444 acpi_gbl_root_table_list.current_table_count++;
445 return (AE_OK);
446}
447
448/*******************************************************************************
449 *
450 * FUNCTION: acpi_tb_delete_table
451 *
452 * PARAMETERS: table_index - Table index
453 *
454 * RETURN: None
455 *
456 * DESCRIPTION: Delete one internal ACPI table
457 *
458 ******************************************************************************/
459
460void acpi_tb_delete_table(struct acpi_table_desc *table_desc)
461{
462 /* Table must be mapped or allocated */
463 if (!table_desc->pointer) {
464 return;
465 }
466 switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
467 case ACPI_TABLE_ORIGIN_MAPPED:
468
469 acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
470 break;
471
472 case ACPI_TABLE_ORIGIN_ALLOCATED:
473
474 ACPI_FREE(table_desc->pointer);
475 break;
476
477 /* Not mapped or allocated, there is nothing we can do */
478
479 default:
480
481 return;
482 }
483
484 table_desc->pointer = NULL;
485}
486
487/*******************************************************************************
488 *
489 * FUNCTION: acpi_tb_terminate
490 *
491 * PARAMETERS: None
492 *
493 * RETURN: None
494 *
495 * DESCRIPTION: Delete all internal ACPI tables
496 *
497 ******************************************************************************/
498
499void acpi_tb_terminate(void)
500{
501 u32 i;
502
503 ACPI_FUNCTION_TRACE(tb_terminate);
504
505 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
506
507 /* Delete the individual tables */
508
509 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
510 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
511 }
512
513 /*
514 * Delete the root table array if allocated locally. Array cannot be
515 * mapped, so we don't need to check for that flag.
516 */
517 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
518 ACPI_FREE(acpi_gbl_root_table_list.tables);
519 }
520
521 acpi_gbl_root_table_list.tables = NULL;
522 acpi_gbl_root_table_list.flags = 0;
523 acpi_gbl_root_table_list.current_table_count = 0;
524
525 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
526 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
527
528 return_VOID;
529}
530
531/*******************************************************************************
532 *
533 * FUNCTION: acpi_tb_delete_namespace_by_owner
534 *
535 * PARAMETERS: table_index - Table index
536 *
537 * RETURN: Status
538 *
539 * DESCRIPTION: Delete all namespace objects created when this table was loaded.
540 *
541 ******************************************************************************/
542
543acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
544{
545 acpi_owner_id owner_id;
546 acpi_status status;
547
548 ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
549
550 status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
551 if (ACPI_FAILURE(status)) {
552 return_ACPI_STATUS(status);
553 }
554
555 if (table_index >= acpi_gbl_root_table_list.current_table_count) {
556
557 /* The table index does not exist */
558
559 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
560 return_ACPI_STATUS(AE_NOT_EXIST);
561 }
562
563 /* Get the owner ID for this table, used to delete namespace nodes */
564
565 owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
566 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
567
568 /*
569 * Need to acquire the namespace writer lock to prevent interference
570 * with any concurrent namespace walks. The interpreter must be
571 * released during the deletion since the acquisition of the deletion
572 * lock may block, and also since the execution of a namespace walk
573 * must be allowed to use the interpreter.
574 */
575 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
576 status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
577
578 acpi_ns_delete_namespace_by_owner(owner_id);
579 if (ACPI_FAILURE(status)) {
580 return_ACPI_STATUS(status);
581 }
582
583 acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
584
585 status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
586 return_ACPI_STATUS(status);
587}
588
589/*******************************************************************************
590 *
591 * FUNCTION: acpi_tb_allocate_owner_id
592 *
593 * PARAMETERS: table_index - Table index
594 *
595 * RETURN: Status
596 *
597 * DESCRIPTION: Allocates owner_id in table_desc
598 *
599 ******************************************************************************/
600
601acpi_status acpi_tb_allocate_owner_id(u32 table_index)
602{
603 acpi_status status = AE_BAD_PARAMETER;
604
605 ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
606
607 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
608 if (table_index < acpi_gbl_root_table_list.current_table_count) {
609 status = acpi_ut_allocate_owner_id
610 (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
611 }
612
613 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
614 return_ACPI_STATUS(status);
615}
616
617/*******************************************************************************
618 *
619 * FUNCTION: acpi_tb_release_owner_id
620 *
621 * PARAMETERS: table_index - Table index
622 *
623 * RETURN: Status
624 *
625 * DESCRIPTION: Releases owner_id in table_desc
626 *
627 ******************************************************************************/
628
629acpi_status acpi_tb_release_owner_id(u32 table_index)
630{
631 acpi_status status = AE_BAD_PARAMETER;
632
633 ACPI_FUNCTION_TRACE(tb_release_owner_id);
634
635 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
636 if (table_index < acpi_gbl_root_table_list.current_table_count) {
637 acpi_ut_release_owner_id(&
638 (acpi_gbl_root_table_list.
639 tables[table_index].owner_id));
640 status = AE_OK;
641 }
642
643 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
644 return_ACPI_STATUS(status);
645}
646
647/*******************************************************************************
648 *
649 * FUNCTION: acpi_tb_get_owner_id
650 *
651 * PARAMETERS: table_index - Table index
652 * owner_id - Where the table owner_id is returned
653 *
654 * RETURN: Status
655 *
656 * DESCRIPTION: returns owner_id for the ACPI table
657 *
658 ******************************************************************************/
659
660acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
661{
662 acpi_status status = AE_BAD_PARAMETER;
663
664 ACPI_FUNCTION_TRACE(tb_get_owner_id);
665
666 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
667 if (table_index < acpi_gbl_root_table_list.current_table_count) {
668 *owner_id =
669 acpi_gbl_root_table_list.tables[table_index].owner_id;
670 status = AE_OK;
671 }
672
673 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
674 return_ACPI_STATUS(status);
675}
676
677/*******************************************************************************
678 *
679 * FUNCTION: acpi_tb_is_table_loaded
680 *
681 * PARAMETERS: table_index - Table index
682 *
683 * RETURN: Table Loaded Flag
684 *
685 ******************************************************************************/
686
687u8 acpi_tb_is_table_loaded(u32 table_index)
688{
689 u8 is_loaded = FALSE;
690
691 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
692 if (table_index < acpi_gbl_root_table_list.current_table_count) {
693 is_loaded = (u8)
694 (acpi_gbl_root_table_list.tables[table_index].flags &
695 ACPI_TABLE_IS_LOADED);
696 }
697
698 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
699 return (is_loaded);
700}
701
702/*******************************************************************************
703 *
704 * FUNCTION: acpi_tb_set_table_loaded_flag
705 *
706 * PARAMETERS: table_index - Table index
707 * is_loaded - TRUE if table is loaded, FALSE otherwise
708 *
709 * RETURN: None
710 *
711 * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
712 *
713 ******************************************************************************/
714
715void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
716{
717
718 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
719 if (table_index < acpi_gbl_root_table_list.current_table_count) {
720 if (is_loaded) {
721 acpi_gbl_root_table_list.tables[table_index].flags |=
722 ACPI_TABLE_IS_LOADED;
723 } else {
724 acpi_gbl_root_table_list.tables[table_index].flags &=
725 ~ACPI_TABLE_IS_LOADED;
726 }
727 }
728
729 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
730}