Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: tbxface - Public interfaces to the ACPI subsystem | |
4 | * ACPI table oriented interfaces | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
a8357b0c | 9 | * Copyright (C) 2000 - 2010, Intel Corp. |
1da177e4 LT |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
1da177e4 | 45 | #include <acpi/acpi.h> |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acnamesp.h" | |
48 | #include "actables.h" | |
1da177e4 | 49 | |
1da177e4 | 50 | #define _COMPONENT ACPI_TABLES |
4be44fcd | 51 | ACPI_MODULE_NAME("tbxface") |
1da177e4 | 52 | |
f3d2e786 BM |
53 | /* Local prototypes */ |
54 | static acpi_status acpi_tb_load_namespace(void); | |
55 | ||
67effe8f LB |
56 | static int no_auto_ssdt; |
57 | ||
77389e12 BM |
58 | /******************************************************************************* |
59 | * | |
60 | * FUNCTION: acpi_allocate_root_table | |
61 | * | |
62 | * PARAMETERS: initial_table_count - Size of initial_table_array, in number of | |
63 | * struct acpi_table_desc structures | |
64 | * | |
65 | * RETURN: Status | |
66 | * | |
67 | * DESCRIPTION: Allocate a root table array. Used by i_aSL compiler and | |
68 | * acpi_initialize_tables. | |
69 | * | |
70 | ******************************************************************************/ | |
71 | ||
72 | acpi_status acpi_allocate_root_table(u32 initial_table_count) | |
73 | { | |
74 | ||
75 | acpi_gbl_root_table_list.size = initial_table_count; | |
76 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE; | |
77 | ||
78 | return (acpi_tb_resize_root_table_list()); | |
79 | } | |
80 | ||
1da177e4 LT |
81 | /******************************************************************************* |
82 | * | |
f3d2e786 | 83 | * FUNCTION: acpi_initialize_tables |
1da177e4 | 84 | * |
f3d2e786 BM |
85 | * PARAMETERS: initial_table_array - Pointer to an array of pre-allocated |
86 | * struct acpi_table_desc structures. If NULL, the | |
87 | * array is dynamically allocated. | |
88 | * initial_table_count - Size of initial_table_array, in number of | |
89 | * struct acpi_table_desc structures | |
90 | * allow_realloc - Flag to tell Table Manager if resize of | |
91 | * pre-allocated array is allowed. Ignored | |
92 | * if initial_table_array is NULL. | |
1da177e4 LT |
93 | * |
94 | * RETURN: Status | |
95 | * | |
f3d2e786 BM |
96 | * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT. |
97 | * | |
98 | * NOTE: Allows static allocation of the initial table array in order | |
99 | * to avoid the use of dynamic memory in confined environments | |
100 | * such as the kernel boot sequence where it may not be available. | |
101 | * | |
102 | * If the host OS memory managers are initialized, use NULL for | |
103 | * initial_table_array, and the table will be dynamically allocated. | |
1da177e4 LT |
104 | * |
105 | ******************************************************************************/ | |
f3d2e786 | 106 | |
ad71860a | 107 | acpi_status __init |
77389e12 | 108 | acpi_initialize_tables(struct acpi_table_desc * initial_table_array, |
f3d2e786 | 109 | u32 initial_table_count, u8 allow_resize) |
1da177e4 | 110 | { |
c5fc42ac | 111 | acpi_physical_address rsdp_address; |
4be44fcd | 112 | acpi_status status; |
1da177e4 | 113 | |
f3d2e786 | 114 | ACPI_FUNCTION_TRACE(acpi_initialize_tables); |
1da177e4 | 115 | |
f3d2e786 BM |
116 | /* |
117 | * Set up the Root Table Array | |
118 | * Allocate the table array if requested | |
119 | */ | |
120 | if (!initial_table_array) { | |
77389e12 | 121 | status = acpi_allocate_root_table(initial_table_count); |
f3d2e786 BM |
122 | if (ACPI_FAILURE(status)) { |
123 | return_ACPI_STATUS(status); | |
124 | } | |
125 | } else { | |
126 | /* Root Table Array has been statically allocated by the host */ | |
127 | ||
a4bbb810 | 128 | ACPI_MEMSET(initial_table_array, 0, |
67a119f9 | 129 | (acpi_size) initial_table_count * |
a4bbb810 | 130 | sizeof(struct acpi_table_desc)); |
c5fc42ac | 131 | |
f3d2e786 BM |
132 | acpi_gbl_root_table_list.tables = initial_table_array; |
133 | acpi_gbl_root_table_list.size = initial_table_count; | |
c5fc42ac | 134 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN; |
f3d2e786 | 135 | if (allow_resize) { |
c5fc42ac BM |
136 | acpi_gbl_root_table_list.flags |= |
137 | ACPI_ROOT_ALLOW_RESIZE; | |
f3d2e786 | 138 | } |
1da177e4 LT |
139 | } |
140 | ||
c5fc42ac | 141 | /* Get the address of the RSDP */ |
1da177e4 | 142 | |
c5fc42ac BM |
143 | rsdp_address = acpi_os_get_root_pointer(); |
144 | if (!rsdp_address) { | |
f3d2e786 BM |
145 | return_ACPI_STATUS(AE_NOT_FOUND); |
146 | } | |
1da177e4 | 147 | |
f3d2e786 BM |
148 | /* |
149 | * Get the root table (RSDT or XSDT) and extract all entries to the local | |
150 | * Root Table Array. This array contains the information of the RSDT/XSDT | |
151 | * in a common, more useable format. | |
152 | */ | |
97cbb7d1 | 153 | status = acpi_tb_parse_root_table(rsdp_address); |
f3d2e786 BM |
154 | return_ACPI_STATUS(status); |
155 | } | |
1da177e4 | 156 | |
f3d2e786 BM |
157 | /******************************************************************************* |
158 | * | |
159 | * FUNCTION: acpi_reallocate_root_table | |
160 | * | |
161 | * PARAMETERS: None | |
162 | * | |
163 | * RETURN: Status | |
164 | * | |
165 | * DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the | |
166 | * root list from the previously provided scratch area. Should | |
167 | * be called once dynamic memory allocation is available in the | |
168 | * kernel | |
169 | * | |
170 | ******************************************************************************/ | |
171 | acpi_status acpi_reallocate_root_table(void) | |
172 | { | |
173 | struct acpi_table_desc *tables; | |
174 | acpi_size new_size; | |
175 | ||
176 | ACPI_FUNCTION_TRACE(acpi_reallocate_root_table); | |
177 | ||
178 | /* | |
179 | * Only reallocate the root table if the host provided a static buffer | |
180 | * for the table array in the call to acpi_initialize_tables. | |
181 | */ | |
c5fc42ac | 182 | if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { |
f3d2e786 | 183 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
184 | } |
185 | ||
67a119f9 BM |
186 | new_size = ((acpi_size) acpi_gbl_root_table_list.count + |
187 | ACPI_ROOT_TABLE_SIZE_INCREMENT) * | |
188 | sizeof(struct acpi_table_desc); | |
1da177e4 | 189 | |
f3d2e786 | 190 | /* Create new array and copy the old array */ |
1da177e4 | 191 | |
f3d2e786 BM |
192 | tables = ACPI_ALLOCATE_ZEROED(new_size); |
193 | if (!tables) { | |
194 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
195 | } |
196 | ||
f3d2e786 | 197 | ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, new_size); |
1da177e4 | 198 | |
f3d2e786 BM |
199 | acpi_gbl_root_table_list.size = acpi_gbl_root_table_list.count; |
200 | acpi_gbl_root_table_list.tables = tables; | |
201 | acpi_gbl_root_table_list.flags = | |
c5fc42ac | 202 | ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE; |
8313524a | 203 | |
f3d2e786 BM |
204 | return_ACPI_STATUS(AE_OK); |
205 | } | |
fd350943 | 206 | |
1da177e4 LT |
207 | /******************************************************************************* |
208 | * | |
209 | * FUNCTION: acpi_load_table | |
210 | * | |
211 | * PARAMETERS: table_ptr - pointer to a buffer containing the entire | |
212 | * table to be loaded | |
213 | * | |
214 | * RETURN: Status | |
215 | * | |
216 | * DESCRIPTION: This function is called to load a table from the caller's | |
f6dd9221 BM |
217 | * buffer. The buffer must contain an entire ACPI Table including |
218 | * a valid header. The header fields will be verified, and if it | |
1da177e4 LT |
219 | * is determined that the table is invalid, the call will fail. |
220 | * | |
221 | ******************************************************************************/ | |
4be44fcd | 222 | acpi_status acpi_load_table(struct acpi_table_header *table_ptr) |
1da177e4 | 223 | { |
4be44fcd | 224 | acpi_status status; |
67a119f9 | 225 | u32 table_index; |
428f2112 AS |
226 | struct acpi_table_desc table_desc; |
227 | ||
228 | if (!table_ptr) | |
229 | return AE_BAD_PARAMETER; | |
230 | ||
231 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); | |
232 | table_desc.pointer = table_ptr; | |
233 | table_desc.length = table_ptr->length; | |
234 | table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN; | |
1da177e4 | 235 | |
f3d2e786 BM |
236 | /* |
237 | * Install the new table into the local data structures | |
238 | */ | |
428f2112 | 239 | status = acpi_tb_add_table(&table_desc, &table_index); |
4be44fcd | 240 | if (ACPI_FAILURE(status)) { |
428f2112 | 241 | return status; |
0c9938cc | 242 | } |
f3d2e786 | 243 | status = acpi_ns_load_table(table_index, acpi_gbl_root_node); |
428f2112 | 244 | return status; |
f3d2e786 | 245 | } |
0c9938cc | 246 | |
f3d2e786 | 247 | ACPI_EXPORT_SYMBOL(acpi_load_table) |
52fc0b02 | 248 | |
ec41f193 | 249 | /******************************************************************************* |
f3d2e786 BM |
250 | * |
251 | * FUNCTION: acpi_get_table_header | |
252 | * | |
253 | * PARAMETERS: Signature - ACPI signature of needed table | |
254 | * Instance - Which instance (for SSDTs) | |
428f2112 | 255 | * out_table_header - The pointer to the table header to fill |
f3d2e786 BM |
256 | * |
257 | * RETURN: Status and pointer to mapped table header | |
258 | * | |
259 | * DESCRIPTION: Finds an ACPI table header. | |
260 | * | |
261 | * NOTE: Caller is responsible in unmapping the header with | |
262 | * acpi_os_unmap_memory | |
263 | * | |
ec41f193 | 264 | ******************************************************************************/ |
f3d2e786 BM |
265 | acpi_status |
266 | acpi_get_table_header(char *signature, | |
67a119f9 | 267 | u32 instance, struct acpi_table_header *out_table_header) |
f3d2e786 | 268 | { |
67a119f9 BM |
269 | u32 i; |
270 | u32 j; | |
428f2112 | 271 | struct acpi_table_header *header; |
0c9938cc | 272 | |
c5fc42ac BM |
273 | /* Parameter validation */ |
274 | ||
275 | if (!signature || !out_table_header) { | |
276 | return (AE_BAD_PARAMETER); | |
277 | } | |
278 | ||
ec41f193 BM |
279 | /* Walk the root table list */ |
280 | ||
f3d2e786 BM |
281 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { |
282 | if (!ACPI_COMPARE_NAME | |
283 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
284 | signature)) { | |
285 | continue; | |
0c9938cc RM |
286 | } |
287 | ||
f3d2e786 BM |
288 | if (++j < instance) { |
289 | continue; | |
290 | } | |
1da177e4 | 291 | |
428f2112 | 292 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
ec41f193 BM |
293 | if ((acpi_gbl_root_table_list.tables[i].flags & |
294 | ACPI_TABLE_ORIGIN_MASK) == | |
428f2112 AS |
295 | ACPI_TABLE_ORIGIN_MAPPED) { |
296 | header = | |
297 | acpi_os_map_memory(acpi_gbl_root_table_list. | |
298 | tables[i].address, | |
299 | sizeof(struct | |
300 | acpi_table_header)); | |
301 | if (!header) { | |
302 | return AE_NO_MEMORY; | |
303 | } | |
304 | ACPI_MEMCPY(out_table_header, header, | |
305 | sizeof(struct acpi_table_header)); | |
306 | acpi_os_unmap_memory(header, | |
307 | sizeof(struct | |
308 | acpi_table_header)); | |
309 | } else { | |
310 | return AE_NOT_FOUND; | |
311 | } | |
312 | } else { | |
313 | ACPI_MEMCPY(out_table_header, | |
314 | acpi_gbl_root_table_list.tables[i].pointer, | |
315 | sizeof(struct acpi_table_header)); | |
f3d2e786 | 316 | } |
f3d2e786 | 317 | return (AE_OK); |
1da177e4 LT |
318 | } |
319 | ||
f3d2e786 | 320 | return (AE_NOT_FOUND); |
1da177e4 LT |
321 | } |
322 | ||
f3d2e786 | 323 | ACPI_EXPORT_SYMBOL(acpi_get_table_header) |
8313524a | 324 | |
ec41f193 | 325 | /******************************************************************************* |
0f0fe1a0 JK |
326 | * |
327 | * FUNCTION: acpi_unload_table_id | |
328 | * | |
f3d2e786 | 329 | * PARAMETERS: id - Owner ID of the table to be removed. |
0f0fe1a0 JK |
330 | * |
331 | * RETURN: Status | |
332 | * | |
333 | * DESCRIPTION: This routine is used to force the unload of a table (by id) | |
334 | * | |
335 | ******************************************************************************/ | |
f3d2e786 | 336 | acpi_status acpi_unload_table_id(acpi_owner_id id) |
0f0fe1a0 | 337 | { |
f3d2e786 BM |
338 | int i; |
339 | acpi_status status = AE_NOT_EXIST; | |
0f0fe1a0 | 340 | |
ecb5f752 | 341 | ACPI_FUNCTION_TRACE(acpi_unload_table_id); |
0f0fe1a0 | 342 | |
ecb5f752 | 343 | /* Find table in the global table list */ |
f3d2e786 BM |
344 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { |
345 | if (id != acpi_gbl_root_table_list.tables[i].owner_id) { | |
346 | continue; | |
347 | } | |
348 | /* | |
fd350943 LB |
349 | * Delete all namespace objects owned by this table. Note that these |
350 | * objects can appear anywhere in the namespace by virtue of the AML | |
351 | * "Scope" operator. Thus, we need to track ownership by an ID, not | |
352 | * simply a position within the hierarchy | |
353 | */ | |
f3d2e786 | 354 | acpi_tb_delete_namespace_by_owner(i); |
ecb5f752 | 355 | status = acpi_tb_release_owner_id(i); |
f3d2e786 | 356 | acpi_tb_set_table_loaded_flag(i, FALSE); |
ecb5f752 | 357 | break; |
f3d2e786 BM |
358 | } |
359 | return_ACPI_STATUS(status); | |
0f0fe1a0 JK |
360 | } |
361 | ||
362 | ACPI_EXPORT_SYMBOL(acpi_unload_table_id) | |
363 | ||
1da177e4 LT |
364 | /******************************************************************************* |
365 | * | |
7d97277b | 366 | * FUNCTION: acpi_get_table_with_size |
1da177e4 | 367 | * |
f3d2e786 BM |
368 | * PARAMETERS: Signature - ACPI signature of needed table |
369 | * Instance - Which instance (for SSDTs) | |
370 | * out_table - Where the pointer to the table is returned | |
1da177e4 | 371 | * |
f3d2e786 | 372 | * RETURN: Status and pointer to table |
1da177e4 | 373 | * |
f3d2e786 | 374 | * DESCRIPTION: Finds and verifies an ACPI table. |
1da177e4 | 375 | * |
ec41f193 | 376 | ******************************************************************************/ |
f3d2e786 | 377 | acpi_status |
7d97277b YL |
378 | acpi_get_table_with_size(char *signature, |
379 | u32 instance, struct acpi_table_header **out_table, | |
380 | acpi_size *tbl_size) | |
1da177e4 | 381 | { |
67a119f9 BM |
382 | u32 i; |
383 | u32 j; | |
f3d2e786 | 384 | acpi_status status; |
1da177e4 | 385 | |
c5fc42ac BM |
386 | /* Parameter validation */ |
387 | ||
388 | if (!signature || !out_table) { | |
389 | return (AE_BAD_PARAMETER); | |
390 | } | |
391 | ||
ec41f193 BM |
392 | /* Walk the root table list */ |
393 | ||
f3d2e786 BM |
394 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { |
395 | if (!ACPI_COMPARE_NAME | |
396 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
397 | signature)) { | |
398 | continue; | |
399 | } | |
1da177e4 | 400 | |
f3d2e786 BM |
401 | if (++j < instance) { |
402 | continue; | |
403 | } | |
1da177e4 | 404 | |
f3d2e786 BM |
405 | status = |
406 | acpi_tb_verify_table(&acpi_gbl_root_table_list.tables[i]); | |
407 | if (ACPI_SUCCESS(status)) { | |
408 | *out_table = acpi_gbl_root_table_list.tables[i].pointer; | |
7d97277b | 409 | *tbl_size = acpi_gbl_root_table_list.tables[i].length; |
f3d2e786 | 410 | } |
f6dd9221 | 411 | |
ad71860a | 412 | if (!acpi_gbl_permanent_mmap) { |
70c0846e | 413 | acpi_gbl_root_table_list.tables[i].pointer = NULL; |
ad71860a AS |
414 | } |
415 | ||
f3d2e786 | 416 | return (status); |
1da177e4 LT |
417 | } |
418 | ||
f3d2e786 | 419 | return (AE_NOT_FOUND); |
1da177e4 LT |
420 | } |
421 | ||
7d97277b YL |
422 | acpi_status |
423 | acpi_get_table(char *signature, | |
424 | u32 instance, struct acpi_table_header **out_table) | |
425 | { | |
426 | acpi_size tbl_size; | |
427 | ||
428 | return acpi_get_table_with_size(signature, | |
429 | instance, out_table, &tbl_size); | |
430 | } | |
f3d2e786 | 431 | ACPI_EXPORT_SYMBOL(acpi_get_table) |
8313524a | 432 | |
1da177e4 LT |
433 | /******************************************************************************* |
434 | * | |
f3d2e786 | 435 | * FUNCTION: acpi_get_table_by_index |
1da177e4 | 436 | * |
f3d2e786 BM |
437 | * PARAMETERS: table_index - Table index |
438 | * Table - Where the pointer to the table is returned | |
1da177e4 | 439 | * |
f3d2e786 | 440 | * RETURN: Status and pointer to the table |
1da177e4 | 441 | * |
f3d2e786 | 442 | * DESCRIPTION: Obtain a table by an index into the global table list. |
1da177e4 LT |
443 | * |
444 | ******************************************************************************/ | |
1da177e4 | 445 | acpi_status |
67a119f9 | 446 | acpi_get_table_by_index(u32 table_index, struct acpi_table_header **table) |
1da177e4 | 447 | { |
4be44fcd | 448 | acpi_status status; |
1da177e4 | 449 | |
f3d2e786 | 450 | ACPI_FUNCTION_TRACE(acpi_get_table_by_index); |
1da177e4 | 451 | |
c5fc42ac BM |
452 | /* Parameter validation */ |
453 | ||
454 | if (!table) { | |
455 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
456 | } | |
457 | ||
f3d2e786 | 458 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 459 | |
f3d2e786 | 460 | /* Validate index */ |
1da177e4 | 461 | |
f3d2e786 BM |
462 | if (table_index >= acpi_gbl_root_table_list.count) { |
463 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
4be44fcd | 464 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
465 | } |
466 | ||
f3d2e786 | 467 | if (!acpi_gbl_root_table_list.tables[table_index].pointer) { |
1da177e4 | 468 | |
f3d2e786 | 469 | /* Table is not mapped, map it */ |
1da177e4 | 470 | |
f3d2e786 BM |
471 | status = |
472 | acpi_tb_verify_table(&acpi_gbl_root_table_list. | |
473 | tables[table_index]); | |
474 | if (ACPI_FAILURE(status)) { | |
475 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
476 | return_ACPI_STATUS(status); | |
477 | } | |
1da177e4 LT |
478 | } |
479 | ||
f3d2e786 BM |
480 | *table = acpi_gbl_root_table_list.tables[table_index].pointer; |
481 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
482 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
483 | } |
484 | ||
f3d2e786 | 485 | ACPI_EXPORT_SYMBOL(acpi_get_table_by_index) |
1da177e4 LT |
486 | |
487 | /******************************************************************************* | |
488 | * | |
f3d2e786 | 489 | * FUNCTION: acpi_tb_load_namespace |
1da177e4 | 490 | * |
f3d2e786 | 491 | * PARAMETERS: None |
1da177e4 LT |
492 | * |
493 | * RETURN: Status | |
494 | * | |
f3d2e786 BM |
495 | * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in |
496 | * the RSDT/XSDT. | |
1da177e4 LT |
497 | * |
498 | ******************************************************************************/ | |
f3d2e786 | 499 | static acpi_status acpi_tb_load_namespace(void) |
1da177e4 | 500 | { |
4be44fcd | 501 | acpi_status status; |
67a119f9 | 502 | u32 i; |
1da177e4 | 503 | |
f3d2e786 | 504 | ACPI_FUNCTION_TRACE(tb_load_namespace); |
1da177e4 | 505 | |
f3d2e786 | 506 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 507 | |
f3d2e786 BM |
508 | /* |
509 | * Load the namespace. The DSDT is required, but any SSDT and PSDT tables | |
510 | * are optional. | |
511 | */ | |
512 | if (!acpi_gbl_root_table_list.count || | |
513 | !ACPI_COMPARE_NAME(& | |
514 | (acpi_gbl_root_table_list. | |
515 | tables[ACPI_TABLE_INDEX_DSDT].signature), | |
516 | ACPI_SIG_DSDT) | |
517 | || | |
518 | ACPI_FAILURE(acpi_tb_verify_table | |
519 | (&acpi_gbl_root_table_list. | |
520 | tables[ACPI_TABLE_INDEX_DSDT]))) { | |
521 | status = AE_NO_ACPI_TABLES; | |
522 | goto unlock_and_exit; | |
1da177e4 LT |
523 | } |
524 | ||
ac5f98db | 525 | /* A valid DSDT is required */ |
1da177e4 | 526 | |
f3d2e786 BM |
527 | status = |
528 | acpi_tb_verify_table(&acpi_gbl_root_table_list. | |
529 | tables[ACPI_TABLE_INDEX_DSDT]); | |
530 | if (ACPI_FAILURE(status)) { | |
531 | ||
f3d2e786 BM |
532 | status = AE_NO_ACPI_TABLES; |
533 | goto unlock_and_exit; | |
1da177e4 LT |
534 | } |
535 | ||
f3d2e786 | 536 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
1da177e4 | 537 | |
ec41f193 BM |
538 | /* Load and parse tables */ |
539 | ||
f3d2e786 | 540 | status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node); |
4be44fcd LB |
541 | if (ACPI_FAILURE(status)) { |
542 | return_ACPI_STATUS(status); | |
1da177e4 LT |
543 | } |
544 | ||
ec41f193 BM |
545 | /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */ |
546 | ||
f3d2e786 BM |
547 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
548 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { | |
549 | if ((!ACPI_COMPARE_NAME | |
550 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
551 | ACPI_SIG_SSDT) | |
552 | && | |
553 | !ACPI_COMPARE_NAME(& | |
554 | (acpi_gbl_root_table_list.tables[i]. | |
555 | signature), ACPI_SIG_PSDT)) | |
556 | || | |
557 | ACPI_FAILURE(acpi_tb_verify_table | |
558 | (&acpi_gbl_root_table_list.tables[i]))) { | |
559 | continue; | |
560 | } | |
561 | ||
67effe8f LB |
562 | if (no_auto_ssdt) { |
563 | printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n"); | |
564 | continue; | |
565 | } | |
566 | ||
f3d2e786 BM |
567 | /* Ignore errors while loading tables, get as many as possible */ |
568 | ||
569 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
570 | (void)acpi_ns_load_table(i, acpi_gbl_root_node); | |
571 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
1da177e4 LT |
572 | } |
573 | ||
f3d2e786 | 574 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n")); |
1da177e4 | 575 | |
f3d2e786 BM |
576 | unlock_and_exit: |
577 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
578 | return_ACPI_STATUS(status); | |
579 | } | |
52fc0b02 | 580 | |
f3d2e786 BM |
581 | /******************************************************************************* |
582 | * | |
583 | * FUNCTION: acpi_load_tables | |
584 | * | |
585 | * PARAMETERS: None | |
586 | * | |
587 | * RETURN: Status | |
588 | * | |
589 | * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT | |
590 | * | |
591 | ******************************************************************************/ | |
44f6c012 | 592 | |
f3d2e786 BM |
593 | acpi_status acpi_load_tables(void) |
594 | { | |
595 | acpi_status status; | |
1da177e4 | 596 | |
f3d2e786 | 597 | ACPI_FUNCTION_TRACE(acpi_load_tables); |
1da177e4 | 598 | |
ec41f193 BM |
599 | /* Load the namespace from the tables */ |
600 | ||
f3d2e786 | 601 | status = acpi_tb_load_namespace(); |
4be44fcd | 602 | if (ACPI_FAILURE(status)) { |
f3d2e786 BM |
603 | ACPI_EXCEPTION((AE_INFO, status, |
604 | "While loading namespace from ACPI tables")); | |
1da177e4 LT |
605 | } |
606 | ||
f3d2e786 | 607 | return_ACPI_STATUS(status); |
1da177e4 | 608 | } |
1da177e4 | 609 | |
f3d2e786 | 610 | ACPI_EXPORT_SYMBOL(acpi_load_tables) |
67effe8f LB |
611 | |
612 | ||
3e08e2d2 LM |
613 | /******************************************************************************* |
614 | * | |
615 | * FUNCTION: acpi_install_table_handler | |
616 | * | |
617 | * PARAMETERS: Handler - Table event handler | |
618 | * Context - Value passed to the handler on each event | |
619 | * | |
620 | * RETURN: Status | |
621 | * | |
622 | * DESCRIPTION: Install table event handler | |
623 | * | |
624 | ******************************************************************************/ | |
625 | acpi_status | |
626 | acpi_install_table_handler(acpi_tbl_handler handler, void *context) | |
627 | { | |
628 | acpi_status status; | |
629 | ||
630 | ACPI_FUNCTION_TRACE(acpi_install_table_handler); | |
631 | ||
632 | if (!handler) { | |
633 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
634 | } | |
635 | ||
636 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
637 | if (ACPI_FAILURE(status)) { | |
638 | return_ACPI_STATUS(status); | |
639 | } | |
640 | ||
641 | /* Don't allow more than one handler */ | |
642 | ||
643 | if (acpi_gbl_table_handler) { | |
644 | status = AE_ALREADY_EXISTS; | |
645 | goto cleanup; | |
646 | } | |
647 | ||
648 | /* Install the handler */ | |
649 | ||
650 | acpi_gbl_table_handler = handler; | |
651 | acpi_gbl_table_handler_context = context; | |
652 | ||
653 | cleanup: | |
654 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
655 | return_ACPI_STATUS(status); | |
656 | } | |
657 | ||
658 | ACPI_EXPORT_SYMBOL(acpi_install_table_handler) | |
659 | ||
660 | /******************************************************************************* | |
661 | * | |
662 | * FUNCTION: acpi_remove_table_handler | |
663 | * | |
664 | * PARAMETERS: Handler - Table event handler that was installed | |
665 | * previously. | |
666 | * | |
667 | * RETURN: Status | |
668 | * | |
669 | * DESCRIPTION: Remove table event handler | |
670 | * | |
671 | ******************************************************************************/ | |
672 | acpi_status acpi_remove_table_handler(acpi_tbl_handler handler) | |
673 | { | |
674 | acpi_status status; | |
675 | ||
676 | ACPI_FUNCTION_TRACE(acpi_remove_table_handler); | |
677 | ||
678 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
679 | if (ACPI_FAILURE(status)) { | |
680 | return_ACPI_STATUS(status); | |
681 | } | |
682 | ||
683 | /* Make sure that the installed handler is the same */ | |
684 | ||
685 | if (!handler || handler != acpi_gbl_table_handler) { | |
686 | status = AE_BAD_PARAMETER; | |
687 | goto cleanup; | |
688 | } | |
689 | ||
690 | /* Remove the handler */ | |
691 | ||
692 | acpi_gbl_table_handler = NULL; | |
693 | ||
694 | cleanup: | |
695 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
696 | return_ACPI_STATUS(status); | |
697 | } | |
698 | ||
699 | ACPI_EXPORT_SYMBOL(acpi_remove_table_handler) | |
700 | ||
701 | ||
67effe8f LB |
702 | static int __init acpi_no_auto_ssdt_setup(char *s) { |
703 | ||
704 | printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n"); | |
705 | ||
706 | no_auto_ssdt = 1; | |
707 | ||
708 | return 1; | |
709 | } | |
710 | ||
711 | __setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup); |