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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 | /* | |
77848130 | 9 | * Copyright (C) 2000 - 2012, 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 | ||
214f2c90 | 45 | #include <linux/export.h> |
1da177e4 | 46 | #include <acpi/acpi.h> |
e2f7a777 LB |
47 | #include "accommon.h" |
48 | #include "acnamesp.h" | |
49 | #include "actables.h" | |
1da177e4 | 50 | |
1da177e4 | 51 | #define _COMPONENT ACPI_TABLES |
4be44fcd | 52 | ACPI_MODULE_NAME("tbxface") |
1da177e4 | 53 | |
f3d2e786 BM |
54 | /* Local prototypes */ |
55 | static acpi_status acpi_tb_load_namespace(void); | |
56 | ||
67effe8f LB |
57 | static int no_auto_ssdt; |
58 | ||
77389e12 BM |
59 | /******************************************************************************* |
60 | * | |
61 | * FUNCTION: acpi_allocate_root_table | |
62 | * | |
63 | * PARAMETERS: initial_table_count - Size of initial_table_array, in number of | |
64 | * struct acpi_table_desc structures | |
65 | * | |
66 | * RETURN: Status | |
67 | * | |
68 | * DESCRIPTION: Allocate a root table array. Used by i_aSL compiler and | |
69 | * acpi_initialize_tables. | |
70 | * | |
71 | ******************************************************************************/ | |
72 | ||
73 | acpi_status acpi_allocate_root_table(u32 initial_table_count) | |
74 | { | |
75 | ||
b9ee2043 | 76 | acpi_gbl_root_table_list.max_table_count = initial_table_count; |
77389e12 BM |
77 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE; |
78 | ||
79 | return (acpi_tb_resize_root_table_list()); | |
80 | } | |
81 | ||
1da177e4 LT |
82 | /******************************************************************************* |
83 | * | |
f3d2e786 | 84 | * FUNCTION: acpi_initialize_tables |
1da177e4 | 85 | * |
f3d2e786 BM |
86 | * PARAMETERS: initial_table_array - Pointer to an array of pre-allocated |
87 | * struct acpi_table_desc structures. If NULL, the | |
88 | * array is dynamically allocated. | |
89 | * initial_table_count - Size of initial_table_array, in number of | |
90 | * struct acpi_table_desc structures | |
91 | * allow_realloc - Flag to tell Table Manager if resize of | |
92 | * pre-allocated array is allowed. Ignored | |
93 | * if initial_table_array is NULL. | |
1da177e4 LT |
94 | * |
95 | * RETURN: Status | |
96 | * | |
f3d2e786 BM |
97 | * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT. |
98 | * | |
99 | * NOTE: Allows static allocation of the initial table array in order | |
100 | * to avoid the use of dynamic memory in confined environments | |
101 | * such as the kernel boot sequence where it may not be available. | |
102 | * | |
103 | * If the host OS memory managers are initialized, use NULL for | |
104 | * initial_table_array, and the table will be dynamically allocated. | |
1da177e4 LT |
105 | * |
106 | ******************************************************************************/ | |
f3d2e786 | 107 | |
ad71860a | 108 | acpi_status __init |
77389e12 | 109 | acpi_initialize_tables(struct acpi_table_desc * initial_table_array, |
f3d2e786 | 110 | u32 initial_table_count, u8 allow_resize) |
1da177e4 | 111 | { |
c5fc42ac | 112 | acpi_physical_address rsdp_address; |
4be44fcd | 113 | acpi_status status; |
1da177e4 | 114 | |
f3d2e786 | 115 | ACPI_FUNCTION_TRACE(acpi_initialize_tables); |
1da177e4 | 116 | |
f3d2e786 BM |
117 | /* |
118 | * Set up the Root Table Array | |
119 | * Allocate the table array if requested | |
120 | */ | |
121 | if (!initial_table_array) { | |
77389e12 | 122 | status = acpi_allocate_root_table(initial_table_count); |
f3d2e786 BM |
123 | if (ACPI_FAILURE(status)) { |
124 | return_ACPI_STATUS(status); | |
125 | } | |
126 | } else { | |
127 | /* Root Table Array has been statically allocated by the host */ | |
128 | ||
a4bbb810 | 129 | ACPI_MEMSET(initial_table_array, 0, |
67a119f9 | 130 | (acpi_size) initial_table_count * |
a4bbb810 | 131 | sizeof(struct acpi_table_desc)); |
c5fc42ac | 132 | |
f3d2e786 | 133 | acpi_gbl_root_table_list.tables = initial_table_array; |
b9ee2043 | 134 | acpi_gbl_root_table_list.max_table_count = initial_table_count; |
c5fc42ac | 135 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN; |
f3d2e786 | 136 | if (allow_resize) { |
c5fc42ac BM |
137 | acpi_gbl_root_table_list.flags |= |
138 | ACPI_ROOT_ALLOW_RESIZE; | |
f3d2e786 | 139 | } |
1da177e4 LT |
140 | } |
141 | ||
c5fc42ac | 142 | /* Get the address of the RSDP */ |
1da177e4 | 143 | |
c5fc42ac BM |
144 | rsdp_address = acpi_os_get_root_pointer(); |
145 | if (!rsdp_address) { | |
f3d2e786 BM |
146 | return_ACPI_STATUS(AE_NOT_FOUND); |
147 | } | |
1da177e4 | 148 | |
f3d2e786 BM |
149 | /* |
150 | * Get the root table (RSDT or XSDT) and extract all entries to the local | |
151 | * Root Table Array. This array contains the information of the RSDT/XSDT | |
152 | * in a common, more useable format. | |
153 | */ | |
97cbb7d1 | 154 | status = acpi_tb_parse_root_table(rsdp_address); |
f3d2e786 BM |
155 | return_ACPI_STATUS(status); |
156 | } | |
1da177e4 | 157 | |
f3d2e786 BM |
158 | /******************************************************************************* |
159 | * | |
160 | * FUNCTION: acpi_reallocate_root_table | |
161 | * | |
162 | * PARAMETERS: None | |
163 | * | |
164 | * RETURN: Status | |
165 | * | |
166 | * DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the | |
167 | * root list from the previously provided scratch area. Should | |
168 | * be called once dynamic memory allocation is available in the | |
169 | * kernel | |
170 | * | |
171 | ******************************************************************************/ | |
172 | acpi_status acpi_reallocate_root_table(void) | |
173 | { | |
174 | struct acpi_table_desc *tables; | |
175 | acpi_size new_size; | |
333b04ae | 176 | acpi_size current_size; |
f3d2e786 BM |
177 | |
178 | ACPI_FUNCTION_TRACE(acpi_reallocate_root_table); | |
179 | ||
180 | /* | |
181 | * Only reallocate the root table if the host provided a static buffer | |
182 | * for the table array in the call to acpi_initialize_tables. | |
183 | */ | |
c5fc42ac | 184 | if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { |
f3d2e786 | 185 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
186 | } |
187 | ||
333b04ae AS |
188 | /* |
189 | * Get the current size of the root table and add the default | |
190 | * increment to create the new table size. | |
191 | */ | |
192 | current_size = (acpi_size) | |
b9ee2043 BM |
193 | acpi_gbl_root_table_list.current_table_count * |
194 | sizeof(struct acpi_table_desc); | |
333b04ae AS |
195 | |
196 | new_size = current_size + | |
197 | (ACPI_ROOT_TABLE_SIZE_INCREMENT * sizeof(struct acpi_table_desc)); | |
1da177e4 | 198 | |
f3d2e786 | 199 | /* Create new array and copy the old array */ |
1da177e4 | 200 | |
f3d2e786 BM |
201 | tables = ACPI_ALLOCATE_ZEROED(new_size); |
202 | if (!tables) { | |
203 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
204 | } |
205 | ||
333b04ae | 206 | ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, current_size); |
1da177e4 | 207 | |
333b04ae AS |
208 | /* |
209 | * Update the root table descriptor. The new size will be the current | |
210 | * number of tables plus the increment, independent of the reserved | |
211 | * size of the original table list. | |
212 | */ | |
f3d2e786 | 213 | acpi_gbl_root_table_list.tables = tables; |
b9ee2043 BM |
214 | acpi_gbl_root_table_list.max_table_count = |
215 | acpi_gbl_root_table_list.current_table_count + | |
216 | ACPI_ROOT_TABLE_SIZE_INCREMENT; | |
f3d2e786 | 217 | acpi_gbl_root_table_list.flags = |
c5fc42ac | 218 | ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE; |
8313524a | 219 | |
f3d2e786 BM |
220 | return_ACPI_STATUS(AE_OK); |
221 | } | |
fd350943 | 222 | |
1da177e4 LT |
223 | /******************************************************************************* |
224 | * | |
225 | * FUNCTION: acpi_load_table | |
226 | * | |
227 | * PARAMETERS: table_ptr - pointer to a buffer containing the entire | |
228 | * table to be loaded | |
229 | * | |
230 | * RETURN: Status | |
231 | * | |
232 | * DESCRIPTION: This function is called to load a table from the caller's | |
f6dd9221 BM |
233 | * buffer. The buffer must contain an entire ACPI Table including |
234 | * a valid header. The header fields will be verified, and if it | |
1da177e4 LT |
235 | * is determined that the table is invalid, the call will fail. |
236 | * | |
237 | ******************************************************************************/ | |
4be44fcd | 238 | acpi_status acpi_load_table(struct acpi_table_header *table_ptr) |
1da177e4 | 239 | { |
4be44fcd | 240 | acpi_status status; |
67a119f9 | 241 | u32 table_index; |
428f2112 AS |
242 | struct acpi_table_desc table_desc; |
243 | ||
244 | if (!table_ptr) | |
245 | return AE_BAD_PARAMETER; | |
246 | ||
247 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); | |
248 | table_desc.pointer = table_ptr; | |
249 | table_desc.length = table_ptr->length; | |
250 | table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN; | |
1da177e4 | 251 | |
f3d2e786 BM |
252 | /* |
253 | * Install the new table into the local data structures | |
254 | */ | |
428f2112 | 255 | status = acpi_tb_add_table(&table_desc, &table_index); |
4be44fcd | 256 | if (ACPI_FAILURE(status)) { |
428f2112 | 257 | return status; |
0c9938cc | 258 | } |
f3d2e786 | 259 | status = acpi_ns_load_table(table_index, acpi_gbl_root_node); |
428f2112 | 260 | return status; |
f3d2e786 | 261 | } |
0c9938cc | 262 | |
f3d2e786 | 263 | ACPI_EXPORT_SYMBOL(acpi_load_table) |
52fc0b02 | 264 | |
ec41f193 | 265 | /******************************************************************************* |
f3d2e786 BM |
266 | * |
267 | * FUNCTION: acpi_get_table_header | |
268 | * | |
269 | * PARAMETERS: Signature - ACPI signature of needed table | |
270 | * Instance - Which instance (for SSDTs) | |
428f2112 | 271 | * out_table_header - The pointer to the table header to fill |
f3d2e786 BM |
272 | * |
273 | * RETURN: Status and pointer to mapped table header | |
274 | * | |
275 | * DESCRIPTION: Finds an ACPI table header. | |
276 | * | |
277 | * NOTE: Caller is responsible in unmapping the header with | |
278 | * acpi_os_unmap_memory | |
279 | * | |
ec41f193 | 280 | ******************************************************************************/ |
f3d2e786 BM |
281 | acpi_status |
282 | acpi_get_table_header(char *signature, | |
67a119f9 | 283 | u32 instance, struct acpi_table_header *out_table_header) |
f3d2e786 | 284 | { |
67a119f9 BM |
285 | u32 i; |
286 | u32 j; | |
428f2112 | 287 | struct acpi_table_header *header; |
0c9938cc | 288 | |
c5fc42ac BM |
289 | /* Parameter validation */ |
290 | ||
291 | if (!signature || !out_table_header) { | |
292 | return (AE_BAD_PARAMETER); | |
293 | } | |
294 | ||
ec41f193 BM |
295 | /* Walk the root table list */ |
296 | ||
b9ee2043 BM |
297 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.current_table_count; |
298 | i++) { | |
f3d2e786 BM |
299 | if (!ACPI_COMPARE_NAME |
300 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
301 | signature)) { | |
302 | continue; | |
0c9938cc RM |
303 | } |
304 | ||
f3d2e786 BM |
305 | if (++j < instance) { |
306 | continue; | |
307 | } | |
1da177e4 | 308 | |
428f2112 | 309 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
ec41f193 BM |
310 | if ((acpi_gbl_root_table_list.tables[i].flags & |
311 | ACPI_TABLE_ORIGIN_MASK) == | |
428f2112 AS |
312 | ACPI_TABLE_ORIGIN_MAPPED) { |
313 | header = | |
314 | acpi_os_map_memory(acpi_gbl_root_table_list. | |
315 | tables[i].address, | |
316 | sizeof(struct | |
317 | acpi_table_header)); | |
318 | if (!header) { | |
319 | return AE_NO_MEMORY; | |
320 | } | |
321 | ACPI_MEMCPY(out_table_header, header, | |
322 | sizeof(struct acpi_table_header)); | |
323 | acpi_os_unmap_memory(header, | |
324 | sizeof(struct | |
325 | acpi_table_header)); | |
326 | } else { | |
327 | return AE_NOT_FOUND; | |
328 | } | |
329 | } else { | |
330 | ACPI_MEMCPY(out_table_header, | |
331 | acpi_gbl_root_table_list.tables[i].pointer, | |
332 | sizeof(struct acpi_table_header)); | |
f3d2e786 | 333 | } |
f3d2e786 | 334 | return (AE_OK); |
1da177e4 LT |
335 | } |
336 | ||
f3d2e786 | 337 | return (AE_NOT_FOUND); |
1da177e4 LT |
338 | } |
339 | ||
f3d2e786 | 340 | ACPI_EXPORT_SYMBOL(acpi_get_table_header) |
8313524a | 341 | |
ec41f193 | 342 | /******************************************************************************* |
0f0fe1a0 JK |
343 | * |
344 | * FUNCTION: acpi_unload_table_id | |
345 | * | |
f3d2e786 | 346 | * PARAMETERS: id - Owner ID of the table to be removed. |
0f0fe1a0 JK |
347 | * |
348 | * RETURN: Status | |
349 | * | |
350 | * DESCRIPTION: This routine is used to force the unload of a table (by id) | |
351 | * | |
352 | ******************************************************************************/ | |
f3d2e786 | 353 | acpi_status acpi_unload_table_id(acpi_owner_id id) |
0f0fe1a0 | 354 | { |
f3d2e786 BM |
355 | int i; |
356 | acpi_status status = AE_NOT_EXIST; | |
0f0fe1a0 | 357 | |
ecb5f752 | 358 | ACPI_FUNCTION_TRACE(acpi_unload_table_id); |
0f0fe1a0 | 359 | |
ecb5f752 | 360 | /* Find table in the global table list */ |
b9ee2043 | 361 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { |
f3d2e786 BM |
362 | if (id != acpi_gbl_root_table_list.tables[i].owner_id) { |
363 | continue; | |
364 | } | |
365 | /* | |
fd350943 LB |
366 | * Delete all namespace objects owned by this table. Note that these |
367 | * objects can appear anywhere in the namespace by virtue of the AML | |
368 | * "Scope" operator. Thus, we need to track ownership by an ID, not | |
369 | * simply a position within the hierarchy | |
370 | */ | |
f3d2e786 | 371 | acpi_tb_delete_namespace_by_owner(i); |
ecb5f752 | 372 | status = acpi_tb_release_owner_id(i); |
f3d2e786 | 373 | acpi_tb_set_table_loaded_flag(i, FALSE); |
ecb5f752 | 374 | break; |
f3d2e786 BM |
375 | } |
376 | return_ACPI_STATUS(status); | |
0f0fe1a0 JK |
377 | } |
378 | ||
379 | ACPI_EXPORT_SYMBOL(acpi_unload_table_id) | |
380 | ||
1da177e4 LT |
381 | /******************************************************************************* |
382 | * | |
7d97277b | 383 | * FUNCTION: acpi_get_table_with_size |
1da177e4 | 384 | * |
f3d2e786 BM |
385 | * PARAMETERS: Signature - ACPI signature of needed table |
386 | * Instance - Which instance (for SSDTs) | |
387 | * out_table - Where the pointer to the table is returned | |
1da177e4 | 388 | * |
f3d2e786 | 389 | * RETURN: Status and pointer to table |
1da177e4 | 390 | * |
f3d2e786 | 391 | * DESCRIPTION: Finds and verifies an ACPI table. |
1da177e4 | 392 | * |
ec41f193 | 393 | ******************************************************************************/ |
f3d2e786 | 394 | acpi_status |
7d97277b YL |
395 | acpi_get_table_with_size(char *signature, |
396 | u32 instance, struct acpi_table_header **out_table, | |
397 | acpi_size *tbl_size) | |
1da177e4 | 398 | { |
67a119f9 BM |
399 | u32 i; |
400 | u32 j; | |
f3d2e786 | 401 | acpi_status status; |
1da177e4 | 402 | |
c5fc42ac BM |
403 | /* Parameter validation */ |
404 | ||
405 | if (!signature || !out_table) { | |
406 | return (AE_BAD_PARAMETER); | |
407 | } | |
408 | ||
ec41f193 BM |
409 | /* Walk the root table list */ |
410 | ||
b9ee2043 BM |
411 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.current_table_count; |
412 | i++) { | |
f3d2e786 BM |
413 | if (!ACPI_COMPARE_NAME |
414 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
415 | signature)) { | |
416 | continue; | |
417 | } | |
1da177e4 | 418 | |
f3d2e786 BM |
419 | if (++j < instance) { |
420 | continue; | |
421 | } | |
1da177e4 | 422 | |
f3d2e786 BM |
423 | status = |
424 | acpi_tb_verify_table(&acpi_gbl_root_table_list.tables[i]); | |
425 | if (ACPI_SUCCESS(status)) { | |
426 | *out_table = acpi_gbl_root_table_list.tables[i].pointer; | |
7d97277b | 427 | *tbl_size = acpi_gbl_root_table_list.tables[i].length; |
f3d2e786 | 428 | } |
f6dd9221 | 429 | |
ad71860a | 430 | if (!acpi_gbl_permanent_mmap) { |
70c0846e | 431 | acpi_gbl_root_table_list.tables[i].pointer = NULL; |
ad71860a AS |
432 | } |
433 | ||
f3d2e786 | 434 | return (status); |
1da177e4 LT |
435 | } |
436 | ||
f3d2e786 | 437 | return (AE_NOT_FOUND); |
1da177e4 LT |
438 | } |
439 | ||
7d97277b YL |
440 | acpi_status |
441 | acpi_get_table(char *signature, | |
442 | u32 instance, struct acpi_table_header **out_table) | |
443 | { | |
444 | acpi_size tbl_size; | |
445 | ||
446 | return acpi_get_table_with_size(signature, | |
447 | instance, out_table, &tbl_size); | |
448 | } | |
f3d2e786 | 449 | ACPI_EXPORT_SYMBOL(acpi_get_table) |
8313524a | 450 | |
1da177e4 LT |
451 | /******************************************************************************* |
452 | * | |
f3d2e786 | 453 | * FUNCTION: acpi_get_table_by_index |
1da177e4 | 454 | * |
f3d2e786 BM |
455 | * PARAMETERS: table_index - Table index |
456 | * Table - Where the pointer to the table is returned | |
1da177e4 | 457 | * |
f3d2e786 | 458 | * RETURN: Status and pointer to the table |
1da177e4 | 459 | * |
f3d2e786 | 460 | * DESCRIPTION: Obtain a table by an index into the global table list. |
1da177e4 LT |
461 | * |
462 | ******************************************************************************/ | |
1da177e4 | 463 | acpi_status |
67a119f9 | 464 | acpi_get_table_by_index(u32 table_index, struct acpi_table_header **table) |
1da177e4 | 465 | { |
4be44fcd | 466 | acpi_status status; |
1da177e4 | 467 | |
f3d2e786 | 468 | ACPI_FUNCTION_TRACE(acpi_get_table_by_index); |
1da177e4 | 469 | |
c5fc42ac BM |
470 | /* Parameter validation */ |
471 | ||
472 | if (!table) { | |
473 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
474 | } | |
475 | ||
f3d2e786 | 476 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 477 | |
f3d2e786 | 478 | /* Validate index */ |
1da177e4 | 479 | |
b9ee2043 | 480 | if (table_index >= acpi_gbl_root_table_list.current_table_count) { |
f3d2e786 | 481 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
4be44fcd | 482 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
483 | } |
484 | ||
f3d2e786 | 485 | if (!acpi_gbl_root_table_list.tables[table_index].pointer) { |
1da177e4 | 486 | |
f3d2e786 | 487 | /* Table is not mapped, map it */ |
1da177e4 | 488 | |
f3d2e786 BM |
489 | status = |
490 | acpi_tb_verify_table(&acpi_gbl_root_table_list. | |
491 | tables[table_index]); | |
492 | if (ACPI_FAILURE(status)) { | |
493 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
494 | return_ACPI_STATUS(status); | |
495 | } | |
1da177e4 LT |
496 | } |
497 | ||
f3d2e786 BM |
498 | *table = acpi_gbl_root_table_list.tables[table_index].pointer; |
499 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
500 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
501 | } |
502 | ||
f3d2e786 | 503 | ACPI_EXPORT_SYMBOL(acpi_get_table_by_index) |
1da177e4 LT |
504 | |
505 | /******************************************************************************* | |
506 | * | |
f3d2e786 | 507 | * FUNCTION: acpi_tb_load_namespace |
1da177e4 | 508 | * |
f3d2e786 | 509 | * PARAMETERS: None |
1da177e4 LT |
510 | * |
511 | * RETURN: Status | |
512 | * | |
f3d2e786 BM |
513 | * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in |
514 | * the RSDT/XSDT. | |
1da177e4 LT |
515 | * |
516 | ******************************************************************************/ | |
f3d2e786 | 517 | static acpi_status acpi_tb_load_namespace(void) |
1da177e4 | 518 | { |
4be44fcd | 519 | acpi_status status; |
67a119f9 | 520 | u32 i; |
43323cb4 | 521 | struct acpi_table_header *new_dsdt; |
1da177e4 | 522 | |
f3d2e786 | 523 | ACPI_FUNCTION_TRACE(tb_load_namespace); |
1da177e4 | 524 | |
f3d2e786 | 525 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 526 | |
f3d2e786 | 527 | /* |
729df0f8 LM |
528 | * Load the namespace. The DSDT is required, but any SSDT and |
529 | * PSDT tables are optional. Verify the DSDT. | |
f3d2e786 | 530 | */ |
b9ee2043 | 531 | if (!acpi_gbl_root_table_list.current_table_count || |
43323cb4 BM |
532 | !ACPI_COMPARE_NAME(& |
533 | (acpi_gbl_root_table_list. | |
534 | tables[ACPI_TABLE_INDEX_DSDT].signature), | |
535 | ACPI_SIG_DSDT) | |
536 | || | |
537 | ACPI_FAILURE(acpi_tb_verify_table | |
538 | (&acpi_gbl_root_table_list. | |
539 | tables[ACPI_TABLE_INDEX_DSDT]))) { | |
f3d2e786 BM |
540 | status = AE_NO_ACPI_TABLES; |
541 | goto unlock_and_exit; | |
1da177e4 LT |
542 | } |
543 | ||
43323cb4 BM |
544 | /* |
545 | * Save the DSDT pointer for simple access. This is the mapped memory | |
546 | * address. We must take care here because the address of the .Tables | |
547 | * array can change dynamically as tables are loaded at run-time. Note: | |
548 | * .Pointer field is not validated until after call to acpi_tb_verify_table. | |
549 | */ | |
550 | acpi_gbl_DSDT = | |
551 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer; | |
552 | ||
69ec87ef LM |
553 | /* |
554 | * Optionally copy the entire DSDT to local memory (instead of simply | |
555 | * mapping it.) There are some BIOSs that corrupt or replace the original | |
556 | * DSDT, creating the need for this option. Default is FALSE, do not copy | |
557 | * the DSDT. | |
558 | */ | |
559 | if (acpi_gbl_copy_dsdt_locally) { | |
43323cb4 BM |
560 | new_dsdt = acpi_tb_copy_dsdt(ACPI_TABLE_INDEX_DSDT); |
561 | if (new_dsdt) { | |
562 | acpi_gbl_DSDT = new_dsdt; | |
563 | } | |
69ec87ef LM |
564 | } |
565 | ||
729df0f8 LM |
566 | /* |
567 | * Save the original DSDT header for detection of table corruption | |
568 | * and/or replacement of the DSDT from outside the OS. | |
569 | */ | |
43323cb4 | 570 | ACPI_MEMCPY(&acpi_gbl_original_dsdt_header, acpi_gbl_DSDT, |
729df0f8 | 571 | sizeof(struct acpi_table_header)); |
1da177e4 | 572 | |
f3d2e786 | 573 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
1da177e4 | 574 | |
ec41f193 BM |
575 | /* Load and parse tables */ |
576 | ||
f3d2e786 | 577 | status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node); |
4be44fcd LB |
578 | if (ACPI_FAILURE(status)) { |
579 | return_ACPI_STATUS(status); | |
1da177e4 LT |
580 | } |
581 | ||
ec41f193 BM |
582 | /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */ |
583 | ||
f3d2e786 | 584 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
b9ee2043 | 585 | for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { |
f3d2e786 BM |
586 | if ((!ACPI_COMPARE_NAME |
587 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
588 | ACPI_SIG_SSDT) | |
589 | && | |
590 | !ACPI_COMPARE_NAME(& | |
591 | (acpi_gbl_root_table_list.tables[i]. | |
592 | signature), ACPI_SIG_PSDT)) | |
593 | || | |
594 | ACPI_FAILURE(acpi_tb_verify_table | |
595 | (&acpi_gbl_root_table_list.tables[i]))) { | |
596 | continue; | |
597 | } | |
598 | ||
67effe8f LB |
599 | if (no_auto_ssdt) { |
600 | printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n"); | |
601 | continue; | |
602 | } | |
603 | ||
f3d2e786 BM |
604 | /* Ignore errors while loading tables, get as many as possible */ |
605 | ||
606 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
607 | (void)acpi_ns_load_table(i, acpi_gbl_root_node); | |
608 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
1da177e4 LT |
609 | } |
610 | ||
f3d2e786 | 611 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n")); |
1da177e4 | 612 | |
f3d2e786 BM |
613 | unlock_and_exit: |
614 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
615 | return_ACPI_STATUS(status); | |
616 | } | |
52fc0b02 | 617 | |
f3d2e786 BM |
618 | /******************************************************************************* |
619 | * | |
620 | * FUNCTION: acpi_load_tables | |
621 | * | |
622 | * PARAMETERS: None | |
623 | * | |
624 | * RETURN: Status | |
625 | * | |
626 | * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT | |
627 | * | |
628 | ******************************************************************************/ | |
44f6c012 | 629 | |
f3d2e786 BM |
630 | acpi_status acpi_load_tables(void) |
631 | { | |
632 | acpi_status status; | |
1da177e4 | 633 | |
f3d2e786 | 634 | ACPI_FUNCTION_TRACE(acpi_load_tables); |
1da177e4 | 635 | |
ec41f193 BM |
636 | /* Load the namespace from the tables */ |
637 | ||
f3d2e786 | 638 | status = acpi_tb_load_namespace(); |
4be44fcd | 639 | if (ACPI_FAILURE(status)) { |
f3d2e786 BM |
640 | ACPI_EXCEPTION((AE_INFO, status, |
641 | "While loading namespace from ACPI tables")); | |
1da177e4 LT |
642 | } |
643 | ||
f3d2e786 | 644 | return_ACPI_STATUS(status); |
1da177e4 | 645 | } |
1da177e4 | 646 | |
f3d2e786 | 647 | ACPI_EXPORT_SYMBOL(acpi_load_tables) |
67effe8f LB |
648 | |
649 | ||
3e08e2d2 LM |
650 | /******************************************************************************* |
651 | * | |
652 | * FUNCTION: acpi_install_table_handler | |
653 | * | |
654 | * PARAMETERS: Handler - Table event handler | |
655 | * Context - Value passed to the handler on each event | |
656 | * | |
657 | * RETURN: Status | |
658 | * | |
659 | * DESCRIPTION: Install table event handler | |
660 | * | |
661 | ******************************************************************************/ | |
662 | acpi_status | |
663 | acpi_install_table_handler(acpi_tbl_handler handler, void *context) | |
664 | { | |
665 | acpi_status status; | |
666 | ||
667 | ACPI_FUNCTION_TRACE(acpi_install_table_handler); | |
668 | ||
669 | if (!handler) { | |
670 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
671 | } | |
672 | ||
673 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
674 | if (ACPI_FAILURE(status)) { | |
675 | return_ACPI_STATUS(status); | |
676 | } | |
677 | ||
678 | /* Don't allow more than one handler */ | |
679 | ||
680 | if (acpi_gbl_table_handler) { | |
681 | status = AE_ALREADY_EXISTS; | |
682 | goto cleanup; | |
683 | } | |
684 | ||
685 | /* Install the handler */ | |
686 | ||
687 | acpi_gbl_table_handler = handler; | |
688 | acpi_gbl_table_handler_context = context; | |
689 | ||
690 | cleanup: | |
691 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
692 | return_ACPI_STATUS(status); | |
693 | } | |
694 | ||
695 | ACPI_EXPORT_SYMBOL(acpi_install_table_handler) | |
696 | ||
697 | /******************************************************************************* | |
698 | * | |
699 | * FUNCTION: acpi_remove_table_handler | |
700 | * | |
701 | * PARAMETERS: Handler - Table event handler that was installed | |
702 | * previously. | |
703 | * | |
704 | * RETURN: Status | |
705 | * | |
706 | * DESCRIPTION: Remove table event handler | |
707 | * | |
708 | ******************************************************************************/ | |
709 | acpi_status acpi_remove_table_handler(acpi_tbl_handler handler) | |
710 | { | |
711 | acpi_status status; | |
712 | ||
713 | ACPI_FUNCTION_TRACE(acpi_remove_table_handler); | |
714 | ||
715 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
716 | if (ACPI_FAILURE(status)) { | |
717 | return_ACPI_STATUS(status); | |
718 | } | |
719 | ||
720 | /* Make sure that the installed handler is the same */ | |
721 | ||
722 | if (!handler || handler != acpi_gbl_table_handler) { | |
723 | status = AE_BAD_PARAMETER; | |
724 | goto cleanup; | |
725 | } | |
726 | ||
727 | /* Remove the handler */ | |
728 | ||
729 | acpi_gbl_table_handler = NULL; | |
730 | ||
731 | cleanup: | |
732 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
733 | return_ACPI_STATUS(status); | |
734 | } | |
735 | ||
736 | ACPI_EXPORT_SYMBOL(acpi_remove_table_handler) | |
737 | ||
738 | ||
67effe8f LB |
739 | static int __init acpi_no_auto_ssdt_setup(char *s) { |
740 | ||
741 | printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n"); | |
742 | ||
743 | no_auto_ssdt = 1; | |
744 | ||
745 | return 1; | |
746 | } | |
747 | ||
748 | __setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup); |