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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 | /* | |
75a44ce0 | 9 | * Copyright (C) 2000 - 2008, 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 LT |
45 | #include <acpi/acpi.h> |
46 | #include <acpi/acnamesp.h> | |
47 | #include <acpi/actables.h> | |
48 | ||
1da177e4 | 49 | #define _COMPONENT ACPI_TABLES |
4be44fcd | 50 | ACPI_MODULE_NAME("tbxface") |
1da177e4 | 51 | |
f3d2e786 BM |
52 | /* Local prototypes */ |
53 | static acpi_status acpi_tb_load_namespace(void); | |
54 | ||
67effe8f LB |
55 | static int no_auto_ssdt; |
56 | ||
77389e12 BM |
57 | /******************************************************************************* |
58 | * | |
59 | * FUNCTION: acpi_allocate_root_table | |
60 | * | |
61 | * PARAMETERS: initial_table_count - Size of initial_table_array, in number of | |
62 | * struct acpi_table_desc structures | |
63 | * | |
64 | * RETURN: Status | |
65 | * | |
66 | * DESCRIPTION: Allocate a root table array. Used by i_aSL compiler and | |
67 | * acpi_initialize_tables. | |
68 | * | |
69 | ******************************************************************************/ | |
70 | ||
71 | acpi_status acpi_allocate_root_table(u32 initial_table_count) | |
72 | { | |
73 | ||
74 | acpi_gbl_root_table_list.size = initial_table_count; | |
75 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE; | |
76 | ||
77 | return (acpi_tb_resize_root_table_list()); | |
78 | } | |
79 | ||
1da177e4 LT |
80 | /******************************************************************************* |
81 | * | |
f3d2e786 | 82 | * FUNCTION: acpi_initialize_tables |
1da177e4 | 83 | * |
f3d2e786 BM |
84 | * PARAMETERS: initial_table_array - Pointer to an array of pre-allocated |
85 | * struct acpi_table_desc structures. If NULL, the | |
86 | * array is dynamically allocated. | |
87 | * initial_table_count - Size of initial_table_array, in number of | |
88 | * struct acpi_table_desc structures | |
89 | * allow_realloc - Flag to tell Table Manager if resize of | |
90 | * pre-allocated array is allowed. Ignored | |
91 | * if initial_table_array is NULL. | |
1da177e4 LT |
92 | * |
93 | * RETURN: Status | |
94 | * | |
f3d2e786 BM |
95 | * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT. |
96 | * | |
97 | * NOTE: Allows static allocation of the initial table array in order | |
98 | * to avoid the use of dynamic memory in confined environments | |
99 | * such as the kernel boot sequence where it may not be available. | |
100 | * | |
101 | * If the host OS memory managers are initialized, use NULL for | |
102 | * initial_table_array, and the table will be dynamically allocated. | |
1da177e4 LT |
103 | * |
104 | ******************************************************************************/ | |
f3d2e786 | 105 | |
ad71860a | 106 | acpi_status __init |
77389e12 | 107 | acpi_initialize_tables(struct acpi_table_desc * initial_table_array, |
f3d2e786 | 108 | u32 initial_table_count, u8 allow_resize) |
1da177e4 | 109 | { |
c5fc42ac | 110 | acpi_physical_address rsdp_address; |
4be44fcd | 111 | acpi_status status; |
1da177e4 | 112 | |
f3d2e786 | 113 | ACPI_FUNCTION_TRACE(acpi_initialize_tables); |
1da177e4 | 114 | |
f3d2e786 BM |
115 | /* |
116 | * Set up the Root Table Array | |
117 | * Allocate the table array if requested | |
118 | */ | |
119 | if (!initial_table_array) { | |
77389e12 | 120 | status = acpi_allocate_root_table(initial_table_count); |
f3d2e786 BM |
121 | if (ACPI_FAILURE(status)) { |
122 | return_ACPI_STATUS(status); | |
123 | } | |
124 | } else { | |
125 | /* Root Table Array has been statically allocated by the host */ | |
126 | ||
a4bbb810 | 127 | ACPI_MEMSET(initial_table_array, 0, |
67a119f9 | 128 | (acpi_size) initial_table_count * |
a4bbb810 | 129 | sizeof(struct acpi_table_desc)); |
c5fc42ac | 130 | |
f3d2e786 BM |
131 | acpi_gbl_root_table_list.tables = initial_table_array; |
132 | acpi_gbl_root_table_list.size = initial_table_count; | |
c5fc42ac | 133 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN; |
f3d2e786 | 134 | if (allow_resize) { |
c5fc42ac BM |
135 | acpi_gbl_root_table_list.flags |= |
136 | ACPI_ROOT_ALLOW_RESIZE; | |
f3d2e786 | 137 | } |
1da177e4 LT |
138 | } |
139 | ||
c5fc42ac | 140 | /* Get the address of the RSDP */ |
1da177e4 | 141 | |
c5fc42ac BM |
142 | rsdp_address = acpi_os_get_root_pointer(); |
143 | if (!rsdp_address) { | |
f3d2e786 BM |
144 | return_ACPI_STATUS(AE_NOT_FOUND); |
145 | } | |
1da177e4 | 146 | |
f3d2e786 BM |
147 | /* |
148 | * Get the root table (RSDT or XSDT) and extract all entries to the local | |
149 | * Root Table Array. This array contains the information of the RSDT/XSDT | |
150 | * in a common, more useable format. | |
151 | */ | |
c5fc42ac BM |
152 | status = |
153 | acpi_tb_parse_root_table(rsdp_address, ACPI_TABLE_ORIGIN_MAPPED); | |
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 | |
f3d2e786 BM |
249 | /****************************************************************************** |
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 | * | |
264 | *****************************************************************************/ | |
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 | ||
f3d2e786 BM |
279 | /* |
280 | * Walk the root table list | |
281 | */ | |
282 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { | |
283 | if (!ACPI_COMPARE_NAME | |
284 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
285 | signature)) { | |
286 | continue; | |
0c9938cc RM |
287 | } |
288 | ||
f3d2e786 BM |
289 | if (++j < instance) { |
290 | continue; | |
291 | } | |
1da177e4 | 292 | |
428f2112 AS |
293 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
294 | if ((acpi_gbl_root_table_list.tables[i]. | |
295 | flags & ACPI_TABLE_ORIGIN_MASK) == | |
296 | ACPI_TABLE_ORIGIN_MAPPED) { | |
297 | header = | |
298 | acpi_os_map_memory(acpi_gbl_root_table_list. | |
299 | tables[i].address, | |
300 | sizeof(struct | |
301 | acpi_table_header)); | |
302 | if (!header) { | |
303 | return AE_NO_MEMORY; | |
304 | } | |
305 | ACPI_MEMCPY(out_table_header, header, | |
306 | sizeof(struct acpi_table_header)); | |
307 | acpi_os_unmap_memory(header, | |
308 | sizeof(struct | |
309 | acpi_table_header)); | |
310 | } else { | |
311 | return AE_NOT_FOUND; | |
312 | } | |
313 | } else { | |
314 | ACPI_MEMCPY(out_table_header, | |
315 | acpi_gbl_root_table_list.tables[i].pointer, | |
316 | sizeof(struct acpi_table_header)); | |
f3d2e786 | 317 | } |
f3d2e786 | 318 | return (AE_OK); |
1da177e4 LT |
319 | } |
320 | ||
f3d2e786 | 321 | return (AE_NOT_FOUND); |
1da177e4 LT |
322 | } |
323 | ||
f3d2e786 | 324 | ACPI_EXPORT_SYMBOL(acpi_get_table_header) |
8313524a | 325 | |
f3d2e786 | 326 | /****************************************************************************** |
0f0fe1a0 JK |
327 | * |
328 | * FUNCTION: acpi_unload_table_id | |
329 | * | |
f3d2e786 | 330 | * PARAMETERS: id - Owner ID of the table to be removed. |
0f0fe1a0 JK |
331 | * |
332 | * RETURN: Status | |
333 | * | |
334 | * DESCRIPTION: This routine is used to force the unload of a table (by id) | |
335 | * | |
336 | ******************************************************************************/ | |
f3d2e786 | 337 | acpi_status acpi_unload_table_id(acpi_owner_id id) |
0f0fe1a0 | 338 | { |
f3d2e786 BM |
339 | int i; |
340 | acpi_status status = AE_NOT_EXIST; | |
0f0fe1a0 | 341 | |
ecb5f752 | 342 | ACPI_FUNCTION_TRACE(acpi_unload_table_id); |
0f0fe1a0 | 343 | |
ecb5f752 | 344 | /* Find table in the global table list */ |
f3d2e786 BM |
345 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { |
346 | if (id != acpi_gbl_root_table_list.tables[i].owner_id) { | |
347 | continue; | |
348 | } | |
349 | /* | |
fd350943 LB |
350 | * Delete all namespace objects owned by this table. Note that these |
351 | * objects can appear anywhere in the namespace by virtue of the AML | |
352 | * "Scope" operator. Thus, we need to track ownership by an ID, not | |
353 | * simply a position within the hierarchy | |
354 | */ | |
f3d2e786 | 355 | acpi_tb_delete_namespace_by_owner(i); |
ecb5f752 | 356 | status = acpi_tb_release_owner_id(i); |
f3d2e786 | 357 | acpi_tb_set_table_loaded_flag(i, FALSE); |
ecb5f752 | 358 | break; |
f3d2e786 BM |
359 | } |
360 | return_ACPI_STATUS(status); | |
0f0fe1a0 JK |
361 | } |
362 | ||
363 | ACPI_EXPORT_SYMBOL(acpi_unload_table_id) | |
364 | ||
1da177e4 LT |
365 | /******************************************************************************* |
366 | * | |
f3d2e786 | 367 | * FUNCTION: acpi_get_table |
1da177e4 | 368 | * |
f3d2e786 BM |
369 | * PARAMETERS: Signature - ACPI signature of needed table |
370 | * Instance - Which instance (for SSDTs) | |
371 | * out_table - Where the pointer to the table is returned | |
1da177e4 | 372 | * |
f3d2e786 | 373 | * RETURN: Status and pointer to table |
1da177e4 | 374 | * |
f3d2e786 | 375 | * DESCRIPTION: Finds and verifies an ACPI table. |
1da177e4 | 376 | * |
f3d2e786 BM |
377 | *****************************************************************************/ |
378 | acpi_status | |
379 | acpi_get_table(char *signature, | |
67a119f9 | 380 | u32 instance, struct acpi_table_header **out_table) |
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 | ||
f3d2e786 BM |
392 | /* |
393 | * Walk the root table list | |
394 | */ | |
395 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { | |
396 | if (!ACPI_COMPARE_NAME | |
397 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
398 | signature)) { | |
399 | continue; | |
400 | } | |
1da177e4 | 401 | |
f3d2e786 BM |
402 | if (++j < instance) { |
403 | continue; | |
404 | } | |
1da177e4 | 405 | |
f3d2e786 BM |
406 | status = |
407 | acpi_tb_verify_table(&acpi_gbl_root_table_list.tables[i]); | |
408 | if (ACPI_SUCCESS(status)) { | |
409 | *out_table = acpi_gbl_root_table_list.tables[i].pointer; | |
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 | ||
f3d2e786 | 422 | ACPI_EXPORT_SYMBOL(acpi_get_table) |
8313524a | 423 | |
1da177e4 LT |
424 | /******************************************************************************* |
425 | * | |
f3d2e786 | 426 | * FUNCTION: acpi_get_table_by_index |
1da177e4 | 427 | * |
f3d2e786 BM |
428 | * PARAMETERS: table_index - Table index |
429 | * Table - Where the pointer to the table is returned | |
1da177e4 | 430 | * |
f3d2e786 | 431 | * RETURN: Status and pointer to the table |
1da177e4 | 432 | * |
f3d2e786 | 433 | * DESCRIPTION: Obtain a table by an index into the global table list. |
1da177e4 LT |
434 | * |
435 | ******************************************************************************/ | |
1da177e4 | 436 | acpi_status |
67a119f9 | 437 | acpi_get_table_by_index(u32 table_index, struct acpi_table_header **table) |
1da177e4 | 438 | { |
4be44fcd | 439 | acpi_status status; |
1da177e4 | 440 | |
f3d2e786 | 441 | ACPI_FUNCTION_TRACE(acpi_get_table_by_index); |
1da177e4 | 442 | |
c5fc42ac BM |
443 | /* Parameter validation */ |
444 | ||
445 | if (!table) { | |
446 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
447 | } | |
448 | ||
f3d2e786 | 449 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 450 | |
f3d2e786 | 451 | /* Validate index */ |
1da177e4 | 452 | |
f3d2e786 BM |
453 | if (table_index >= acpi_gbl_root_table_list.count) { |
454 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
4be44fcd | 455 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
456 | } |
457 | ||
f3d2e786 | 458 | if (!acpi_gbl_root_table_list.tables[table_index].pointer) { |
1da177e4 | 459 | |
f3d2e786 | 460 | /* Table is not mapped, map it */ |
1da177e4 | 461 | |
f3d2e786 BM |
462 | status = |
463 | acpi_tb_verify_table(&acpi_gbl_root_table_list. | |
464 | tables[table_index]); | |
465 | if (ACPI_FAILURE(status)) { | |
466 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
467 | return_ACPI_STATUS(status); | |
468 | } | |
1da177e4 LT |
469 | } |
470 | ||
f3d2e786 BM |
471 | *table = acpi_gbl_root_table_list.tables[table_index].pointer; |
472 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
473 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
474 | } |
475 | ||
f3d2e786 | 476 | ACPI_EXPORT_SYMBOL(acpi_get_table_by_index) |
1da177e4 LT |
477 | |
478 | /******************************************************************************* | |
479 | * | |
f3d2e786 | 480 | * FUNCTION: acpi_tb_load_namespace |
1da177e4 | 481 | * |
f3d2e786 | 482 | * PARAMETERS: None |
1da177e4 LT |
483 | * |
484 | * RETURN: Status | |
485 | * | |
f3d2e786 BM |
486 | * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in |
487 | * the RSDT/XSDT. | |
1da177e4 LT |
488 | * |
489 | ******************************************************************************/ | |
f3d2e786 | 490 | static acpi_status acpi_tb_load_namespace(void) |
1da177e4 | 491 | { |
4be44fcd | 492 | acpi_status status; |
f3d2e786 | 493 | struct acpi_table_header *table; |
67a119f9 | 494 | u32 i; |
1da177e4 | 495 | |
f3d2e786 | 496 | ACPI_FUNCTION_TRACE(tb_load_namespace); |
1da177e4 | 497 | |
f3d2e786 | 498 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 499 | |
f3d2e786 BM |
500 | /* |
501 | * Load the namespace. The DSDT is required, but any SSDT and PSDT tables | |
502 | * are optional. | |
503 | */ | |
504 | if (!acpi_gbl_root_table_list.count || | |
505 | !ACPI_COMPARE_NAME(& | |
506 | (acpi_gbl_root_table_list. | |
507 | tables[ACPI_TABLE_INDEX_DSDT].signature), | |
508 | ACPI_SIG_DSDT) | |
509 | || | |
510 | ACPI_FAILURE(acpi_tb_verify_table | |
511 | (&acpi_gbl_root_table_list. | |
512 | tables[ACPI_TABLE_INDEX_DSDT]))) { | |
513 | status = AE_NO_ACPI_TABLES; | |
514 | goto unlock_and_exit; | |
1da177e4 LT |
515 | } |
516 | ||
f3d2e786 BM |
517 | /* |
518 | * Find DSDT table | |
519 | */ | |
520 | status = | |
521 | acpi_os_table_override(acpi_gbl_root_table_list. | |
522 | tables[ACPI_TABLE_INDEX_DSDT].pointer, | |
523 | &table); | |
524 | if (ACPI_SUCCESS(status) && table) { | |
525 | /* | |
526 | * DSDT table has been found | |
527 | */ | |
035f994b BM |
528 | acpi_tb_delete_table(&acpi_gbl_root_table_list. |
529 | tables[ACPI_TABLE_INDEX_DSDT]); | |
f3d2e786 BM |
530 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer = |
531 | table; | |
532 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].length = | |
533 | table->length; | |
534 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].flags = | |
535 | ACPI_TABLE_ORIGIN_UNKNOWN; | |
536 | ||
537 | ACPI_INFO((AE_INFO, "Table DSDT replaced by host OS")); | |
538 | acpi_tb_print_table_header(0, table); | |
67effe8f LB |
539 | |
540 | if (no_auto_ssdt == 0) { | |
c21d1e7f | 541 | printk(KERN_WARNING "ACPI: DSDT override uses original SSDTs unless \"acpi_no_auto_ssdt\"\n"); |
67effe8f | 542 | } |
1da177e4 LT |
543 | } |
544 | ||
f3d2e786 BM |
545 | status = |
546 | acpi_tb_verify_table(&acpi_gbl_root_table_list. | |
547 | tables[ACPI_TABLE_INDEX_DSDT]); | |
548 | if (ACPI_FAILURE(status)) { | |
549 | ||
550 | /* A valid DSDT is required */ | |
1da177e4 | 551 | |
f3d2e786 BM |
552 | status = AE_NO_ACPI_TABLES; |
553 | goto unlock_and_exit; | |
1da177e4 LT |
554 | } |
555 | ||
f3d2e786 | 556 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
1da177e4 | 557 | |
f3d2e786 BM |
558 | /* |
559 | * Load and parse tables. | |
560 | */ | |
561 | status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node); | |
4be44fcd LB |
562 | if (ACPI_FAILURE(status)) { |
563 | return_ACPI_STATUS(status); | |
1da177e4 LT |
564 | } |
565 | ||
566 | /* | |
f3d2e786 | 567 | * Load any SSDT or PSDT tables. Note: Loop leaves tables locked |
1da177e4 | 568 | */ |
f3d2e786 BM |
569 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
570 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { | |
571 | if ((!ACPI_COMPARE_NAME | |
572 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
573 | ACPI_SIG_SSDT) | |
574 | && | |
575 | !ACPI_COMPARE_NAME(& | |
576 | (acpi_gbl_root_table_list.tables[i]. | |
577 | signature), ACPI_SIG_PSDT)) | |
578 | || | |
579 | ACPI_FAILURE(acpi_tb_verify_table | |
580 | (&acpi_gbl_root_table_list.tables[i]))) { | |
581 | continue; | |
582 | } | |
583 | ||
67effe8f LB |
584 | if (no_auto_ssdt) { |
585 | printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n"); | |
586 | continue; | |
587 | } | |
588 | ||
f3d2e786 BM |
589 | /* Ignore errors while loading tables, get as many as possible */ |
590 | ||
591 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
592 | (void)acpi_ns_load_table(i, acpi_gbl_root_node); | |
593 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
1da177e4 LT |
594 | } |
595 | ||
f3d2e786 | 596 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n")); |
1da177e4 | 597 | |
f3d2e786 BM |
598 | unlock_and_exit: |
599 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
600 | return_ACPI_STATUS(status); | |
601 | } | |
52fc0b02 | 602 | |
f3d2e786 BM |
603 | /******************************************************************************* |
604 | * | |
605 | * FUNCTION: acpi_load_tables | |
606 | * | |
607 | * PARAMETERS: None | |
608 | * | |
609 | * RETURN: Status | |
610 | * | |
611 | * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT | |
612 | * | |
613 | ******************************************************************************/ | |
44f6c012 | 614 | |
f3d2e786 BM |
615 | acpi_status acpi_load_tables(void) |
616 | { | |
617 | acpi_status status; | |
1da177e4 | 618 | |
f3d2e786 | 619 | ACPI_FUNCTION_TRACE(acpi_load_tables); |
1da177e4 | 620 | |
f3d2e786 BM |
621 | /* |
622 | * Load the namespace from the tables | |
623 | */ | |
624 | status = acpi_tb_load_namespace(); | |
4be44fcd | 625 | if (ACPI_FAILURE(status)) { |
f3d2e786 BM |
626 | ACPI_EXCEPTION((AE_INFO, status, |
627 | "While loading namespace from ACPI tables")); | |
1da177e4 LT |
628 | } |
629 | ||
f3d2e786 | 630 | return_ACPI_STATUS(status); |
1da177e4 | 631 | } |
1da177e4 | 632 | |
f3d2e786 | 633 | ACPI_EXPORT_SYMBOL(acpi_load_tables) |
67effe8f LB |
634 | |
635 | ||
3e08e2d2 LM |
636 | /******************************************************************************* |
637 | * | |
638 | * FUNCTION: acpi_install_table_handler | |
639 | * | |
640 | * PARAMETERS: Handler - Table event handler | |
641 | * Context - Value passed to the handler on each event | |
642 | * | |
643 | * RETURN: Status | |
644 | * | |
645 | * DESCRIPTION: Install table event handler | |
646 | * | |
647 | ******************************************************************************/ | |
648 | acpi_status | |
649 | acpi_install_table_handler(acpi_tbl_handler handler, void *context) | |
650 | { | |
651 | acpi_status status; | |
652 | ||
653 | ACPI_FUNCTION_TRACE(acpi_install_table_handler); | |
654 | ||
655 | if (!handler) { | |
656 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
657 | } | |
658 | ||
659 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
660 | if (ACPI_FAILURE(status)) { | |
661 | return_ACPI_STATUS(status); | |
662 | } | |
663 | ||
664 | /* Don't allow more than one handler */ | |
665 | ||
666 | if (acpi_gbl_table_handler) { | |
667 | status = AE_ALREADY_EXISTS; | |
668 | goto cleanup; | |
669 | } | |
670 | ||
671 | /* Install the handler */ | |
672 | ||
673 | acpi_gbl_table_handler = handler; | |
674 | acpi_gbl_table_handler_context = context; | |
675 | ||
676 | cleanup: | |
677 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
678 | return_ACPI_STATUS(status); | |
679 | } | |
680 | ||
681 | ACPI_EXPORT_SYMBOL(acpi_install_table_handler) | |
682 | ||
683 | /******************************************************************************* | |
684 | * | |
685 | * FUNCTION: acpi_remove_table_handler | |
686 | * | |
687 | * PARAMETERS: Handler - Table event handler that was installed | |
688 | * previously. | |
689 | * | |
690 | * RETURN: Status | |
691 | * | |
692 | * DESCRIPTION: Remove table event handler | |
693 | * | |
694 | ******************************************************************************/ | |
695 | acpi_status acpi_remove_table_handler(acpi_tbl_handler handler) | |
696 | { | |
697 | acpi_status status; | |
698 | ||
699 | ACPI_FUNCTION_TRACE(acpi_remove_table_handler); | |
700 | ||
701 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
702 | if (ACPI_FAILURE(status)) { | |
703 | return_ACPI_STATUS(status); | |
704 | } | |
705 | ||
706 | /* Make sure that the installed handler is the same */ | |
707 | ||
708 | if (!handler || handler != acpi_gbl_table_handler) { | |
709 | status = AE_BAD_PARAMETER; | |
710 | goto cleanup; | |
711 | } | |
712 | ||
713 | /* Remove the handler */ | |
714 | ||
715 | acpi_gbl_table_handler = NULL; | |
716 | ||
717 | cleanup: | |
718 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
719 | return_ACPI_STATUS(status); | |
720 | } | |
721 | ||
722 | ACPI_EXPORT_SYMBOL(acpi_remove_table_handler) | |
723 | ||
724 | ||
67effe8f LB |
725 | static int __init acpi_no_auto_ssdt_setup(char *s) { |
726 | ||
727 | printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n"); | |
728 | ||
729 | no_auto_ssdt = 1; | |
730 | ||
731 | return 1; | |
732 | } | |
733 | ||
734 | __setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup); |