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 | /* | |
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 | 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 | */ | |
c5fc42ac BM |
153 | status = |
154 | acpi_tb_parse_root_table(rsdp_address, ACPI_TABLE_ORIGIN_MAPPED); | |
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; | |
176 | ||
177 | ACPI_FUNCTION_TRACE(acpi_reallocate_root_table); | |
178 | ||
179 | /* | |
180 | * Only reallocate the root table if the host provided a static buffer | |
181 | * for the table array in the call to acpi_initialize_tables. | |
182 | */ | |
c5fc42ac | 183 | if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { |
f3d2e786 | 184 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
185 | } |
186 | ||
67a119f9 BM |
187 | new_size = ((acpi_size) acpi_gbl_root_table_list.count + |
188 | ACPI_ROOT_TABLE_SIZE_INCREMENT) * | |
189 | sizeof(struct acpi_table_desc); | |
1da177e4 | 190 | |
f3d2e786 | 191 | /* Create new array and copy the old array */ |
1da177e4 | 192 | |
f3d2e786 BM |
193 | tables = ACPI_ALLOCATE_ZEROED(new_size); |
194 | if (!tables) { | |
195 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
196 | } |
197 | ||
f3d2e786 | 198 | ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, new_size); |
1da177e4 | 199 | |
f3d2e786 BM |
200 | acpi_gbl_root_table_list.size = acpi_gbl_root_table_list.count; |
201 | acpi_gbl_root_table_list.tables = tables; | |
202 | acpi_gbl_root_table_list.flags = | |
c5fc42ac | 203 | ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE; |
8313524a | 204 | |
f3d2e786 BM |
205 | return_ACPI_STATUS(AE_OK); |
206 | } | |
fd350943 | 207 | |
1da177e4 LT |
208 | /******************************************************************************* |
209 | * | |
210 | * FUNCTION: acpi_load_table | |
211 | * | |
212 | * PARAMETERS: table_ptr - pointer to a buffer containing the entire | |
213 | * table to be loaded | |
214 | * | |
215 | * RETURN: Status | |
216 | * | |
217 | * DESCRIPTION: This function is called to load a table from the caller's | |
f6dd9221 BM |
218 | * buffer. The buffer must contain an entire ACPI Table including |
219 | * a valid header. The header fields will be verified, and if it | |
1da177e4 LT |
220 | * is determined that the table is invalid, the call will fail. |
221 | * | |
222 | ******************************************************************************/ | |
4be44fcd | 223 | acpi_status acpi_load_table(struct acpi_table_header *table_ptr) |
1da177e4 | 224 | { |
4be44fcd | 225 | acpi_status status; |
67a119f9 | 226 | u32 table_index; |
428f2112 AS |
227 | struct acpi_table_desc table_desc; |
228 | ||
229 | if (!table_ptr) | |
230 | return AE_BAD_PARAMETER; | |
231 | ||
232 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); | |
233 | table_desc.pointer = table_ptr; | |
234 | table_desc.length = table_ptr->length; | |
235 | table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN; | |
1da177e4 | 236 | |
f3d2e786 BM |
237 | /* |
238 | * Install the new table into the local data structures | |
239 | */ | |
428f2112 | 240 | status = acpi_tb_add_table(&table_desc, &table_index); |
4be44fcd | 241 | if (ACPI_FAILURE(status)) { |
428f2112 | 242 | return status; |
0c9938cc | 243 | } |
f3d2e786 | 244 | status = acpi_ns_load_table(table_index, acpi_gbl_root_node); |
428f2112 | 245 | return status; |
f3d2e786 | 246 | } |
0c9938cc | 247 | |
f3d2e786 | 248 | ACPI_EXPORT_SYMBOL(acpi_load_table) |
52fc0b02 | 249 | |
f3d2e786 BM |
250 | /****************************************************************************** |
251 | * | |
252 | * FUNCTION: acpi_get_table_header | |
253 | * | |
254 | * PARAMETERS: Signature - ACPI signature of needed table | |
255 | * Instance - Which instance (for SSDTs) | |
428f2112 | 256 | * out_table_header - The pointer to the table header to fill |
f3d2e786 BM |
257 | * |
258 | * RETURN: Status and pointer to mapped table header | |
259 | * | |
260 | * DESCRIPTION: Finds an ACPI table header. | |
261 | * | |
262 | * NOTE: Caller is responsible in unmapping the header with | |
263 | * acpi_os_unmap_memory | |
264 | * | |
265 | *****************************************************************************/ | |
266 | acpi_status | |
267 | acpi_get_table_header(char *signature, | |
67a119f9 | 268 | u32 instance, struct acpi_table_header *out_table_header) |
f3d2e786 | 269 | { |
67a119f9 BM |
270 | u32 i; |
271 | u32 j; | |
428f2112 | 272 | struct acpi_table_header *header; |
0c9938cc | 273 | |
c5fc42ac BM |
274 | /* Parameter validation */ |
275 | ||
276 | if (!signature || !out_table_header) { | |
277 | return (AE_BAD_PARAMETER); | |
278 | } | |
279 | ||
f3d2e786 BM |
280 | /* |
281 | * Walk the root table list | |
282 | */ | |
283 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { | |
284 | if (!ACPI_COMPARE_NAME | |
285 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
286 | signature)) { | |
287 | continue; | |
0c9938cc RM |
288 | } |
289 | ||
f3d2e786 BM |
290 | if (++j < instance) { |
291 | continue; | |
292 | } | |
1da177e4 | 293 | |
428f2112 AS |
294 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
295 | if ((acpi_gbl_root_table_list.tables[i]. | |
296 | flags & ACPI_TABLE_ORIGIN_MASK) == | |
297 | ACPI_TABLE_ORIGIN_MAPPED) { | |
298 | header = | |
299 | acpi_os_map_memory(acpi_gbl_root_table_list. | |
300 | tables[i].address, | |
301 | sizeof(struct | |
302 | acpi_table_header)); | |
303 | if (!header) { | |
304 | return AE_NO_MEMORY; | |
305 | } | |
306 | ACPI_MEMCPY(out_table_header, header, | |
307 | sizeof(struct acpi_table_header)); | |
308 | acpi_os_unmap_memory(header, | |
309 | sizeof(struct | |
310 | acpi_table_header)); | |
311 | } else { | |
312 | return AE_NOT_FOUND; | |
313 | } | |
314 | } else { | |
315 | ACPI_MEMCPY(out_table_header, | |
316 | acpi_gbl_root_table_list.tables[i].pointer, | |
317 | sizeof(struct acpi_table_header)); | |
f3d2e786 | 318 | } |
f3d2e786 | 319 | return (AE_OK); |
1da177e4 LT |
320 | } |
321 | ||
f3d2e786 | 322 | return (AE_NOT_FOUND); |
1da177e4 LT |
323 | } |
324 | ||
f3d2e786 | 325 | ACPI_EXPORT_SYMBOL(acpi_get_table_header) |
8313524a | 326 | |
f3d2e786 | 327 | /****************************************************************************** |
0f0fe1a0 JK |
328 | * |
329 | * FUNCTION: acpi_unload_table_id | |
330 | * | |
f3d2e786 | 331 | * PARAMETERS: id - Owner ID of the table to be removed. |
0f0fe1a0 JK |
332 | * |
333 | * RETURN: Status | |
334 | * | |
335 | * DESCRIPTION: This routine is used to force the unload of a table (by id) | |
336 | * | |
337 | ******************************************************************************/ | |
f3d2e786 | 338 | acpi_status acpi_unload_table_id(acpi_owner_id id) |
0f0fe1a0 | 339 | { |
f3d2e786 BM |
340 | int i; |
341 | acpi_status status = AE_NOT_EXIST; | |
0f0fe1a0 | 342 | |
ecb5f752 | 343 | ACPI_FUNCTION_TRACE(acpi_unload_table_id); |
0f0fe1a0 | 344 | |
ecb5f752 | 345 | /* Find table in the global table list */ |
f3d2e786 BM |
346 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { |
347 | if (id != acpi_gbl_root_table_list.tables[i].owner_id) { | |
348 | continue; | |
349 | } | |
350 | /* | |
fd350943 LB |
351 | * Delete all namespace objects owned by this table. Note that these |
352 | * objects can appear anywhere in the namespace by virtue of the AML | |
353 | * "Scope" operator. Thus, we need to track ownership by an ID, not | |
354 | * simply a position within the hierarchy | |
355 | */ | |
f3d2e786 | 356 | acpi_tb_delete_namespace_by_owner(i); |
ecb5f752 | 357 | status = acpi_tb_release_owner_id(i); |
f3d2e786 | 358 | acpi_tb_set_table_loaded_flag(i, FALSE); |
ecb5f752 | 359 | break; |
f3d2e786 BM |
360 | } |
361 | return_ACPI_STATUS(status); | |
0f0fe1a0 JK |
362 | } |
363 | ||
364 | ACPI_EXPORT_SYMBOL(acpi_unload_table_id) | |
365 | ||
1da177e4 LT |
366 | /******************************************************************************* |
367 | * | |
f3d2e786 | 368 | * FUNCTION: acpi_get_table |
1da177e4 | 369 | * |
f3d2e786 BM |
370 | * PARAMETERS: Signature - ACPI signature of needed table |
371 | * Instance - Which instance (for SSDTs) | |
372 | * out_table - Where the pointer to the table is returned | |
1da177e4 | 373 | * |
f3d2e786 | 374 | * RETURN: Status and pointer to table |
1da177e4 | 375 | * |
f3d2e786 | 376 | * DESCRIPTION: Finds and verifies an ACPI table. |
1da177e4 | 377 | * |
f3d2e786 BM |
378 | *****************************************************************************/ |
379 | acpi_status | |
380 | acpi_get_table(char *signature, | |
67a119f9 | 381 | u32 instance, struct acpi_table_header **out_table) |
1da177e4 | 382 | { |
67a119f9 BM |
383 | u32 i; |
384 | u32 j; | |
f3d2e786 | 385 | acpi_status status; |
1da177e4 | 386 | |
c5fc42ac BM |
387 | /* Parameter validation */ |
388 | ||
389 | if (!signature || !out_table) { | |
390 | return (AE_BAD_PARAMETER); | |
391 | } | |
392 | ||
f3d2e786 BM |
393 | /* |
394 | * Walk the root table list | |
395 | */ | |
396 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { | |
397 | if (!ACPI_COMPARE_NAME | |
398 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
399 | signature)) { | |
400 | continue; | |
401 | } | |
1da177e4 | 402 | |
f3d2e786 BM |
403 | if (++j < instance) { |
404 | continue; | |
405 | } | |
1da177e4 | 406 | |
f3d2e786 BM |
407 | status = |
408 | acpi_tb_verify_table(&acpi_gbl_root_table_list.tables[i]); | |
409 | if (ACPI_SUCCESS(status)) { | |
410 | *out_table = acpi_gbl_root_table_list.tables[i].pointer; | |
411 | } | |
f6dd9221 | 412 | |
ad71860a | 413 | if (!acpi_gbl_permanent_mmap) { |
70c0846e | 414 | acpi_gbl_root_table_list.tables[i].pointer = NULL; |
ad71860a AS |
415 | } |
416 | ||
f3d2e786 | 417 | return (status); |
1da177e4 LT |
418 | } |
419 | ||
f3d2e786 | 420 | return (AE_NOT_FOUND); |
1da177e4 LT |
421 | } |
422 | ||
f3d2e786 | 423 | ACPI_EXPORT_SYMBOL(acpi_get_table) |
8313524a | 424 | |
1da177e4 LT |
425 | /******************************************************************************* |
426 | * | |
f3d2e786 | 427 | * FUNCTION: acpi_get_table_by_index |
1da177e4 | 428 | * |
f3d2e786 BM |
429 | * PARAMETERS: table_index - Table index |
430 | * Table - Where the pointer to the table is returned | |
1da177e4 | 431 | * |
f3d2e786 | 432 | * RETURN: Status and pointer to the table |
1da177e4 | 433 | * |
f3d2e786 | 434 | * DESCRIPTION: Obtain a table by an index into the global table list. |
1da177e4 LT |
435 | * |
436 | ******************************************************************************/ | |
1da177e4 | 437 | acpi_status |
67a119f9 | 438 | acpi_get_table_by_index(u32 table_index, struct acpi_table_header **table) |
1da177e4 | 439 | { |
4be44fcd | 440 | acpi_status status; |
1da177e4 | 441 | |
f3d2e786 | 442 | ACPI_FUNCTION_TRACE(acpi_get_table_by_index); |
1da177e4 | 443 | |
c5fc42ac BM |
444 | /* Parameter validation */ |
445 | ||
446 | if (!table) { | |
447 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
448 | } | |
449 | ||
f3d2e786 | 450 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 451 | |
f3d2e786 | 452 | /* Validate index */ |
1da177e4 | 453 | |
f3d2e786 BM |
454 | if (table_index >= acpi_gbl_root_table_list.count) { |
455 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
4be44fcd | 456 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
457 | } |
458 | ||
f3d2e786 | 459 | if (!acpi_gbl_root_table_list.tables[table_index].pointer) { |
1da177e4 | 460 | |
f3d2e786 | 461 | /* Table is not mapped, map it */ |
1da177e4 | 462 | |
f3d2e786 BM |
463 | status = |
464 | acpi_tb_verify_table(&acpi_gbl_root_table_list. | |
465 | tables[table_index]); | |
466 | if (ACPI_FAILURE(status)) { | |
467 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
468 | return_ACPI_STATUS(status); | |
469 | } | |
1da177e4 LT |
470 | } |
471 | ||
f3d2e786 BM |
472 | *table = acpi_gbl_root_table_list.tables[table_index].pointer; |
473 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
474 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
475 | } |
476 | ||
f3d2e786 | 477 | ACPI_EXPORT_SYMBOL(acpi_get_table_by_index) |
1da177e4 LT |
478 | |
479 | /******************************************************************************* | |
480 | * | |
f3d2e786 | 481 | * FUNCTION: acpi_tb_load_namespace |
1da177e4 | 482 | * |
f3d2e786 | 483 | * PARAMETERS: None |
1da177e4 LT |
484 | * |
485 | * RETURN: Status | |
486 | * | |
f3d2e786 BM |
487 | * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in |
488 | * the RSDT/XSDT. | |
1da177e4 LT |
489 | * |
490 | ******************************************************************************/ | |
f3d2e786 | 491 | static acpi_status acpi_tb_load_namespace(void) |
1da177e4 | 492 | { |
4be44fcd | 493 | acpi_status status; |
f3d2e786 | 494 | struct acpi_table_header *table; |
67a119f9 | 495 | u32 i; |
1da177e4 | 496 | |
f3d2e786 | 497 | ACPI_FUNCTION_TRACE(tb_load_namespace); |
1da177e4 | 498 | |
f3d2e786 | 499 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 500 | |
f3d2e786 BM |
501 | /* |
502 | * Load the namespace. The DSDT is required, but any SSDT and PSDT tables | |
503 | * are optional. | |
504 | */ | |
505 | if (!acpi_gbl_root_table_list.count || | |
506 | !ACPI_COMPARE_NAME(& | |
507 | (acpi_gbl_root_table_list. | |
508 | tables[ACPI_TABLE_INDEX_DSDT].signature), | |
509 | ACPI_SIG_DSDT) | |
510 | || | |
511 | ACPI_FAILURE(acpi_tb_verify_table | |
512 | (&acpi_gbl_root_table_list. | |
513 | tables[ACPI_TABLE_INDEX_DSDT]))) { | |
514 | status = AE_NO_ACPI_TABLES; | |
515 | goto unlock_and_exit; | |
1da177e4 LT |
516 | } |
517 | ||
f3d2e786 BM |
518 | /* |
519 | * Find DSDT table | |
520 | */ | |
521 | status = | |
522 | acpi_os_table_override(acpi_gbl_root_table_list. | |
523 | tables[ACPI_TABLE_INDEX_DSDT].pointer, | |
524 | &table); | |
525 | if (ACPI_SUCCESS(status) && table) { | |
526 | /* | |
527 | * DSDT table has been found | |
528 | */ | |
035f994b BM |
529 | acpi_tb_delete_table(&acpi_gbl_root_table_list. |
530 | tables[ACPI_TABLE_INDEX_DSDT]); | |
f3d2e786 BM |
531 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer = |
532 | table; | |
533 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].length = | |
534 | table->length; | |
535 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].flags = | |
536 | ACPI_TABLE_ORIGIN_UNKNOWN; | |
537 | ||
538 | ACPI_INFO((AE_INFO, "Table DSDT replaced by host OS")); | |
539 | acpi_tb_print_table_header(0, table); | |
67effe8f LB |
540 | |
541 | if (no_auto_ssdt == 0) { | |
c21d1e7f | 542 | printk(KERN_WARNING "ACPI: DSDT override uses original SSDTs unless \"acpi_no_auto_ssdt\"\n"); |
67effe8f | 543 | } |
1da177e4 LT |
544 | } |
545 | ||
f3d2e786 BM |
546 | status = |
547 | acpi_tb_verify_table(&acpi_gbl_root_table_list. | |
548 | tables[ACPI_TABLE_INDEX_DSDT]); | |
549 | if (ACPI_FAILURE(status)) { | |
550 | ||
551 | /* A valid DSDT is required */ | |
1da177e4 | 552 | |
f3d2e786 BM |
553 | status = AE_NO_ACPI_TABLES; |
554 | goto unlock_and_exit; | |
1da177e4 LT |
555 | } |
556 | ||
f3d2e786 | 557 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
1da177e4 | 558 | |
f3d2e786 BM |
559 | /* |
560 | * Load and parse tables. | |
561 | */ | |
562 | status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node); | |
4be44fcd LB |
563 | if (ACPI_FAILURE(status)) { |
564 | return_ACPI_STATUS(status); | |
1da177e4 LT |
565 | } |
566 | ||
567 | /* | |
f3d2e786 | 568 | * Load any SSDT or PSDT tables. Note: Loop leaves tables locked |
1da177e4 | 569 | */ |
f3d2e786 BM |
570 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
571 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { | |
572 | if ((!ACPI_COMPARE_NAME | |
573 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
574 | ACPI_SIG_SSDT) | |
575 | && | |
576 | !ACPI_COMPARE_NAME(& | |
577 | (acpi_gbl_root_table_list.tables[i]. | |
578 | signature), ACPI_SIG_PSDT)) | |
579 | || | |
580 | ACPI_FAILURE(acpi_tb_verify_table | |
581 | (&acpi_gbl_root_table_list.tables[i]))) { | |
582 | continue; | |
583 | } | |
584 | ||
67effe8f LB |
585 | if (no_auto_ssdt) { |
586 | printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n"); | |
587 | continue; | |
588 | } | |
589 | ||
f3d2e786 BM |
590 | /* Ignore errors while loading tables, get as many as possible */ |
591 | ||
592 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
593 | (void)acpi_ns_load_table(i, acpi_gbl_root_node); | |
594 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
1da177e4 LT |
595 | } |
596 | ||
f3d2e786 | 597 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n")); |
1da177e4 | 598 | |
f3d2e786 BM |
599 | unlock_and_exit: |
600 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
601 | return_ACPI_STATUS(status); | |
602 | } | |
52fc0b02 | 603 | |
f3d2e786 BM |
604 | /******************************************************************************* |
605 | * | |
606 | * FUNCTION: acpi_load_tables | |
607 | * | |
608 | * PARAMETERS: None | |
609 | * | |
610 | * RETURN: Status | |
611 | * | |
612 | * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT | |
613 | * | |
614 | ******************************************************************************/ | |
44f6c012 | 615 | |
f3d2e786 BM |
616 | acpi_status acpi_load_tables(void) |
617 | { | |
618 | acpi_status status; | |
1da177e4 | 619 | |
f3d2e786 | 620 | ACPI_FUNCTION_TRACE(acpi_load_tables); |
1da177e4 | 621 | |
f3d2e786 BM |
622 | /* |
623 | * Load the namespace from the tables | |
624 | */ | |
625 | status = acpi_tb_load_namespace(); | |
4be44fcd | 626 | if (ACPI_FAILURE(status)) { |
f3d2e786 BM |
627 | ACPI_EXCEPTION((AE_INFO, status, |
628 | "While loading namespace from ACPI tables")); | |
1da177e4 LT |
629 | } |
630 | ||
f3d2e786 | 631 | return_ACPI_STATUS(status); |
1da177e4 | 632 | } |
1da177e4 | 633 | |
f3d2e786 | 634 | ACPI_EXPORT_SYMBOL(acpi_load_tables) |
67effe8f LB |
635 | |
636 | ||
3e08e2d2 LM |
637 | /******************************************************************************* |
638 | * | |
639 | * FUNCTION: acpi_install_table_handler | |
640 | * | |
641 | * PARAMETERS: Handler - Table event handler | |
642 | * Context - Value passed to the handler on each event | |
643 | * | |
644 | * RETURN: Status | |
645 | * | |
646 | * DESCRIPTION: Install table event handler | |
647 | * | |
648 | ******************************************************************************/ | |
649 | acpi_status | |
650 | acpi_install_table_handler(acpi_tbl_handler handler, void *context) | |
651 | { | |
652 | acpi_status status; | |
653 | ||
654 | ACPI_FUNCTION_TRACE(acpi_install_table_handler); | |
655 | ||
656 | if (!handler) { | |
657 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
658 | } | |
659 | ||
660 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
661 | if (ACPI_FAILURE(status)) { | |
662 | return_ACPI_STATUS(status); | |
663 | } | |
664 | ||
665 | /* Don't allow more than one handler */ | |
666 | ||
667 | if (acpi_gbl_table_handler) { | |
668 | status = AE_ALREADY_EXISTS; | |
669 | goto cleanup; | |
670 | } | |
671 | ||
672 | /* Install the handler */ | |
673 | ||
674 | acpi_gbl_table_handler = handler; | |
675 | acpi_gbl_table_handler_context = context; | |
676 | ||
677 | cleanup: | |
678 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
679 | return_ACPI_STATUS(status); | |
680 | } | |
681 | ||
682 | ACPI_EXPORT_SYMBOL(acpi_install_table_handler) | |
683 | ||
684 | /******************************************************************************* | |
685 | * | |
686 | * FUNCTION: acpi_remove_table_handler | |
687 | * | |
688 | * PARAMETERS: Handler - Table event handler that was installed | |
689 | * previously. | |
690 | * | |
691 | * RETURN: Status | |
692 | * | |
693 | * DESCRIPTION: Remove table event handler | |
694 | * | |
695 | ******************************************************************************/ | |
696 | acpi_status acpi_remove_table_handler(acpi_tbl_handler handler) | |
697 | { | |
698 | acpi_status status; | |
699 | ||
700 | ACPI_FUNCTION_TRACE(acpi_remove_table_handler); | |
701 | ||
702 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); | |
703 | if (ACPI_FAILURE(status)) { | |
704 | return_ACPI_STATUS(status); | |
705 | } | |
706 | ||
707 | /* Make sure that the installed handler is the same */ | |
708 | ||
709 | if (!handler || handler != acpi_gbl_table_handler) { | |
710 | status = AE_BAD_PARAMETER; | |
711 | goto cleanup; | |
712 | } | |
713 | ||
714 | /* Remove the handler */ | |
715 | ||
716 | acpi_gbl_table_handler = NULL; | |
717 | ||
718 | cleanup: | |
719 | (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
720 | return_ACPI_STATUS(status); | |
721 | } | |
722 | ||
723 | ACPI_EXPORT_SYMBOL(acpi_remove_table_handler) | |
724 | ||
725 | ||
67effe8f LB |
726 | static int __init acpi_no_auto_ssdt_setup(char *s) { |
727 | ||
728 | printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n"); | |
729 | ||
730 | no_auto_ssdt = 1; | |
731 | ||
732 | return 1; | |
733 | } | |
734 | ||
735 | __setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup); |