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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 | /* | |
4a90c7e8 | 9 | * Copyright (C) 2000 - 2006, R. Byron Moore |
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 | ||
77389e12 BM |
55 | /******************************************************************************* |
56 | * | |
57 | * FUNCTION: acpi_allocate_root_table | |
58 | * | |
59 | * PARAMETERS: initial_table_count - Size of initial_table_array, in number of | |
60 | * struct acpi_table_desc structures | |
61 | * | |
62 | * RETURN: Status | |
63 | * | |
64 | * DESCRIPTION: Allocate a root table array. Used by i_aSL compiler and | |
65 | * acpi_initialize_tables. | |
66 | * | |
67 | ******************************************************************************/ | |
68 | ||
69 | acpi_status acpi_allocate_root_table(u32 initial_table_count) | |
70 | { | |
71 | ||
72 | acpi_gbl_root_table_list.size = initial_table_count; | |
73 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE; | |
74 | ||
75 | return (acpi_tb_resize_root_table_list()); | |
76 | } | |
77 | ||
1da177e4 LT |
78 | /******************************************************************************* |
79 | * | |
f3d2e786 | 80 | * FUNCTION: acpi_initialize_tables |
1da177e4 | 81 | * |
f3d2e786 BM |
82 | * PARAMETERS: initial_table_array - Pointer to an array of pre-allocated |
83 | * struct acpi_table_desc structures. If NULL, the | |
84 | * array is dynamically allocated. | |
85 | * initial_table_count - Size of initial_table_array, in number of | |
86 | * struct acpi_table_desc structures | |
87 | * allow_realloc - Flag to tell Table Manager if resize of | |
88 | * pre-allocated array is allowed. Ignored | |
89 | * if initial_table_array is NULL. | |
1da177e4 LT |
90 | * |
91 | * RETURN: Status | |
92 | * | |
f3d2e786 BM |
93 | * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT. |
94 | * | |
95 | * NOTE: Allows static allocation of the initial table array in order | |
96 | * to avoid the use of dynamic memory in confined environments | |
97 | * such as the kernel boot sequence where it may not be available. | |
98 | * | |
99 | * If the host OS memory managers are initialized, use NULL for | |
100 | * initial_table_array, and the table will be dynamically allocated. | |
1da177e4 LT |
101 | * |
102 | ******************************************************************************/ | |
f3d2e786 | 103 | |
ad71860a | 104 | acpi_status __init |
77389e12 | 105 | acpi_initialize_tables(struct acpi_table_desc * initial_table_array, |
f3d2e786 | 106 | u32 initial_table_count, u8 allow_resize) |
1da177e4 | 107 | { |
c5fc42ac | 108 | acpi_physical_address rsdp_address; |
4be44fcd | 109 | acpi_status status; |
1da177e4 | 110 | |
f3d2e786 | 111 | ACPI_FUNCTION_TRACE(acpi_initialize_tables); |
1da177e4 | 112 | |
f3d2e786 BM |
113 | /* |
114 | * Set up the Root Table Array | |
115 | * Allocate the table array if requested | |
116 | */ | |
117 | if (!initial_table_array) { | |
77389e12 | 118 | status = acpi_allocate_root_table(initial_table_count); |
f3d2e786 BM |
119 | if (ACPI_FAILURE(status)) { |
120 | return_ACPI_STATUS(status); | |
121 | } | |
122 | } else { | |
123 | /* Root Table Array has been statically allocated by the host */ | |
124 | ||
a4bbb810 | 125 | ACPI_MEMSET(initial_table_array, 0, |
c5fc42ac | 126 | initial_table_count * |
a4bbb810 | 127 | sizeof(struct acpi_table_desc)); |
c5fc42ac | 128 | |
f3d2e786 BM |
129 | acpi_gbl_root_table_list.tables = initial_table_array; |
130 | acpi_gbl_root_table_list.size = initial_table_count; | |
c5fc42ac | 131 | acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN; |
f3d2e786 | 132 | if (allow_resize) { |
c5fc42ac BM |
133 | acpi_gbl_root_table_list.flags |= |
134 | ACPI_ROOT_ALLOW_RESIZE; | |
f3d2e786 | 135 | } |
1da177e4 LT |
136 | } |
137 | ||
c5fc42ac | 138 | /* Get the address of the RSDP */ |
1da177e4 | 139 | |
c5fc42ac BM |
140 | rsdp_address = acpi_os_get_root_pointer(); |
141 | if (!rsdp_address) { | |
f3d2e786 BM |
142 | return_ACPI_STATUS(AE_NOT_FOUND); |
143 | } | |
1da177e4 | 144 | |
f3d2e786 BM |
145 | /* |
146 | * Get the root table (RSDT or XSDT) and extract all entries to the local | |
147 | * Root Table Array. This array contains the information of the RSDT/XSDT | |
148 | * in a common, more useable format. | |
149 | */ | |
c5fc42ac BM |
150 | status = |
151 | acpi_tb_parse_root_table(rsdp_address, ACPI_TABLE_ORIGIN_MAPPED); | |
f3d2e786 BM |
152 | return_ACPI_STATUS(status); |
153 | } | |
1da177e4 | 154 | |
f3d2e786 BM |
155 | /******************************************************************************* |
156 | * | |
157 | * FUNCTION: acpi_reallocate_root_table | |
158 | * | |
159 | * PARAMETERS: None | |
160 | * | |
161 | * RETURN: Status | |
162 | * | |
163 | * DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the | |
164 | * root list from the previously provided scratch area. Should | |
165 | * be called once dynamic memory allocation is available in the | |
166 | * kernel | |
167 | * | |
168 | ******************************************************************************/ | |
169 | acpi_status acpi_reallocate_root_table(void) | |
170 | { | |
171 | struct acpi_table_desc *tables; | |
172 | acpi_size new_size; | |
173 | ||
174 | ACPI_FUNCTION_TRACE(acpi_reallocate_root_table); | |
175 | ||
176 | /* | |
177 | * Only reallocate the root table if the host provided a static buffer | |
178 | * for the table array in the call to acpi_initialize_tables. | |
179 | */ | |
c5fc42ac | 180 | if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { |
f3d2e786 | 181 | return_ACPI_STATUS(AE_SUPPORT); |
1da177e4 LT |
182 | } |
183 | ||
f3d2e786 BM |
184 | new_size = |
185 | (acpi_gbl_root_table_list.count + | |
186 | ACPI_ROOT_TABLE_SIZE_INCREMENT) * sizeof(struct acpi_table_desc); | |
1da177e4 | 187 | |
f3d2e786 | 188 | /* Create new array and copy the old array */ |
1da177e4 | 189 | |
f3d2e786 BM |
190 | tables = ACPI_ALLOCATE_ZEROED(new_size); |
191 | if (!tables) { | |
192 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
193 | } |
194 | ||
f3d2e786 | 195 | ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, new_size); |
1da177e4 | 196 | |
f3d2e786 BM |
197 | acpi_gbl_root_table_list.size = acpi_gbl_root_table_list.count; |
198 | acpi_gbl_root_table_list.tables = tables; | |
199 | acpi_gbl_root_table_list.flags = | |
c5fc42ac | 200 | ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE; |
8313524a | 201 | |
f3d2e786 BM |
202 | return_ACPI_STATUS(AE_OK); |
203 | } | |
1da177e4 LT |
204 | /******************************************************************************* |
205 | * | |
206 | * FUNCTION: acpi_load_table | |
207 | * | |
208 | * PARAMETERS: table_ptr - pointer to a buffer containing the entire | |
209 | * table to be loaded | |
210 | * | |
211 | * RETURN: Status | |
212 | * | |
213 | * DESCRIPTION: This function is called to load a table from the caller's | |
f6dd9221 BM |
214 | * buffer. The buffer must contain an entire ACPI Table including |
215 | * a valid header. The header fields will be verified, and if it | |
1da177e4 LT |
216 | * is determined that the table is invalid, the call will fail. |
217 | * | |
218 | ******************************************************************************/ | |
4be44fcd | 219 | acpi_status acpi_load_table(struct acpi_table_header *table_ptr) |
1da177e4 | 220 | { |
4be44fcd | 221 | acpi_status status; |
f3d2e786 | 222 | acpi_native_uint table_index; |
428f2112 AS |
223 | struct acpi_table_desc table_desc; |
224 | ||
225 | if (!table_ptr) | |
226 | return AE_BAD_PARAMETER; | |
227 | ||
228 | ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc)); | |
229 | table_desc.pointer = table_ptr; | |
230 | table_desc.length = table_ptr->length; | |
231 | table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN; | |
1da177e4 | 232 | |
f3d2e786 BM |
233 | /* |
234 | * Install the new table into the local data structures | |
235 | */ | |
428f2112 | 236 | status = acpi_tb_add_table(&table_desc, &table_index); |
4be44fcd | 237 | if (ACPI_FAILURE(status)) { |
428f2112 | 238 | return status; |
0c9938cc | 239 | } |
f3d2e786 | 240 | status = acpi_ns_load_table(table_index, acpi_gbl_root_node); |
428f2112 | 241 | return status; |
f3d2e786 | 242 | } |
0c9938cc | 243 | |
f3d2e786 | 244 | ACPI_EXPORT_SYMBOL(acpi_load_table) |
52fc0b02 | 245 | |
f3d2e786 BM |
246 | /****************************************************************************** |
247 | * | |
248 | * FUNCTION: acpi_get_table_header | |
249 | * | |
250 | * PARAMETERS: Signature - ACPI signature of needed table | |
251 | * Instance - Which instance (for SSDTs) | |
428f2112 | 252 | * out_table_header - The pointer to the table header to fill |
f3d2e786 BM |
253 | * |
254 | * RETURN: Status and pointer to mapped table header | |
255 | * | |
256 | * DESCRIPTION: Finds an ACPI table header. | |
257 | * | |
258 | * NOTE: Caller is responsible in unmapping the header with | |
259 | * acpi_os_unmap_memory | |
260 | * | |
261 | *****************************************************************************/ | |
262 | acpi_status | |
263 | acpi_get_table_header(char *signature, | |
264 | acpi_native_uint instance, | |
428f2112 | 265 | struct acpi_table_header *out_table_header) |
f3d2e786 BM |
266 | { |
267 | acpi_native_uint i; | |
268 | acpi_native_uint j; | |
428f2112 | 269 | struct acpi_table_header *header; |
0c9938cc | 270 | |
c5fc42ac BM |
271 | /* Parameter validation */ |
272 | ||
273 | if (!signature || !out_table_header) { | |
274 | return (AE_BAD_PARAMETER); | |
275 | } | |
276 | ||
f3d2e786 BM |
277 | /* |
278 | * Walk the root table list | |
279 | */ | |
280 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { | |
281 | if (!ACPI_COMPARE_NAME | |
282 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
283 | signature)) { | |
284 | continue; | |
0c9938cc RM |
285 | } |
286 | ||
f3d2e786 BM |
287 | if (++j < instance) { |
288 | continue; | |
289 | } | |
1da177e4 | 290 | |
428f2112 AS |
291 | if (!acpi_gbl_root_table_list.tables[i].pointer) { |
292 | if ((acpi_gbl_root_table_list.tables[i]. | |
293 | flags & ACPI_TABLE_ORIGIN_MASK) == | |
294 | ACPI_TABLE_ORIGIN_MAPPED) { | |
295 | header = | |
296 | acpi_os_map_memory(acpi_gbl_root_table_list. | |
297 | tables[i].address, | |
298 | sizeof(struct | |
299 | acpi_table_header)); | |
300 | if (!header) { | |
301 | return AE_NO_MEMORY; | |
302 | } | |
303 | ACPI_MEMCPY(out_table_header, header, | |
304 | sizeof(struct acpi_table_header)); | |
305 | acpi_os_unmap_memory(header, | |
306 | sizeof(struct | |
307 | acpi_table_header)); | |
308 | } else { | |
309 | return AE_NOT_FOUND; | |
310 | } | |
311 | } else { | |
312 | ACPI_MEMCPY(out_table_header, | |
313 | acpi_gbl_root_table_list.tables[i].pointer, | |
314 | sizeof(struct acpi_table_header)); | |
f3d2e786 | 315 | } |
f3d2e786 | 316 | return (AE_OK); |
1da177e4 LT |
317 | } |
318 | ||
f3d2e786 | 319 | return (AE_NOT_FOUND); |
1da177e4 LT |
320 | } |
321 | ||
f3d2e786 | 322 | ACPI_EXPORT_SYMBOL(acpi_get_table_header) |
8313524a | 323 | |
f3d2e786 BM |
324 | |
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 JK |
340 | |
341 | ACPI_FUNCTION_TRACE(acpi_unload_table); | |
342 | ||
0f0fe1a0 | 343 | /* Find table from the requested type 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 | /* | |
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 | */ | |
354 | acpi_tb_delete_namespace_by_owner(i); | |
355 | acpi_tb_release_owner_id(i); | |
356 | acpi_tb_set_table_loaded_flag(i, FALSE); | |
357 | } | |
358 | return_ACPI_STATUS(status); | |
0f0fe1a0 JK |
359 | } |
360 | ||
361 | ACPI_EXPORT_SYMBOL(acpi_unload_table_id) | |
362 | ||
1da177e4 LT |
363 | /******************************************************************************* |
364 | * | |
f3d2e786 | 365 | * FUNCTION: acpi_get_table |
1da177e4 | 366 | * |
f3d2e786 BM |
367 | * PARAMETERS: Signature - ACPI signature of needed table |
368 | * Instance - Which instance (for SSDTs) | |
369 | * out_table - Where the pointer to the table is returned | |
1da177e4 | 370 | * |
f3d2e786 | 371 | * RETURN: Status and pointer to table |
1da177e4 | 372 | * |
f3d2e786 | 373 | * DESCRIPTION: Finds and verifies an ACPI table. |
1da177e4 | 374 | * |
f3d2e786 BM |
375 | *****************************************************************************/ |
376 | acpi_status | |
377 | acpi_get_table(char *signature, | |
378 | acpi_native_uint instance, struct acpi_table_header ** out_table) | |
1da177e4 | 379 | { |
f3d2e786 BM |
380 | acpi_native_uint i; |
381 | acpi_native_uint j; | |
382 | acpi_status status; | |
1da177e4 | 383 | |
c5fc42ac BM |
384 | /* Parameter validation */ |
385 | ||
386 | if (!signature || !out_table) { | |
387 | return (AE_BAD_PARAMETER); | |
388 | } | |
389 | ||
f3d2e786 BM |
390 | /* |
391 | * Walk the root table list | |
392 | */ | |
393 | for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) { | |
394 | if (!ACPI_COMPARE_NAME | |
395 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
396 | signature)) { | |
397 | continue; | |
398 | } | |
1da177e4 | 399 | |
f3d2e786 BM |
400 | if (++j < instance) { |
401 | continue; | |
402 | } | |
1da177e4 | 403 | |
f3d2e786 BM |
404 | status = |
405 | acpi_tb_verify_table(&acpi_gbl_root_table_list.tables[i]); | |
406 | if (ACPI_SUCCESS(status)) { | |
407 | *out_table = acpi_gbl_root_table_list.tables[i].pointer; | |
408 | } | |
f6dd9221 | 409 | |
ad71860a AS |
410 | if (!acpi_gbl_permanent_mmap) { |
411 | acpi_gbl_root_table_list.tables[i].pointer = 0; | |
412 | } | |
413 | ||
f3d2e786 | 414 | return (status); |
1da177e4 LT |
415 | } |
416 | ||
f3d2e786 | 417 | return (AE_NOT_FOUND); |
1da177e4 LT |
418 | } |
419 | ||
f3d2e786 | 420 | ACPI_EXPORT_SYMBOL(acpi_get_table) |
8313524a | 421 | |
1da177e4 LT |
422 | /******************************************************************************* |
423 | * | |
f3d2e786 | 424 | * FUNCTION: acpi_get_table_by_index |
1da177e4 | 425 | * |
f3d2e786 BM |
426 | * PARAMETERS: table_index - Table index |
427 | * Table - Where the pointer to the table is returned | |
1da177e4 | 428 | * |
f3d2e786 | 429 | * RETURN: Status and pointer to the table |
1da177e4 | 430 | * |
f3d2e786 | 431 | * DESCRIPTION: Obtain a table by an index into the global table list. |
1da177e4 LT |
432 | * |
433 | ******************************************************************************/ | |
1da177e4 | 434 | acpi_status |
f3d2e786 BM |
435 | acpi_get_table_by_index(acpi_native_uint table_index, |
436 | struct acpi_table_header ** table) | |
1da177e4 | 437 | { |
4be44fcd | 438 | acpi_status status; |
1da177e4 | 439 | |
f3d2e786 | 440 | ACPI_FUNCTION_TRACE(acpi_get_table_by_index); |
1da177e4 | 441 | |
c5fc42ac BM |
442 | /* Parameter validation */ |
443 | ||
444 | if (!table) { | |
445 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
446 | } | |
447 | ||
f3d2e786 | 448 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 449 | |
f3d2e786 | 450 | /* Validate index */ |
1da177e4 | 451 | |
f3d2e786 BM |
452 | if (table_index >= acpi_gbl_root_table_list.count) { |
453 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
4be44fcd | 454 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
455 | } |
456 | ||
f3d2e786 | 457 | if (!acpi_gbl_root_table_list.tables[table_index].pointer) { |
1da177e4 | 458 | |
f3d2e786 | 459 | /* Table is not mapped, map it */ |
1da177e4 | 460 | |
f3d2e786 BM |
461 | status = |
462 | acpi_tb_verify_table(&acpi_gbl_root_table_list. | |
463 | tables[table_index]); | |
464 | if (ACPI_FAILURE(status)) { | |
465 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
466 | return_ACPI_STATUS(status); | |
467 | } | |
1da177e4 LT |
468 | } |
469 | ||
f3d2e786 BM |
470 | *table = acpi_gbl_root_table_list.tables[table_index].pointer; |
471 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
472 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
473 | } |
474 | ||
f3d2e786 | 475 | ACPI_EXPORT_SYMBOL(acpi_get_table_by_index) |
1da177e4 LT |
476 | |
477 | /******************************************************************************* | |
478 | * | |
f3d2e786 | 479 | * FUNCTION: acpi_tb_load_namespace |
1da177e4 | 480 | * |
f3d2e786 | 481 | * PARAMETERS: None |
1da177e4 LT |
482 | * |
483 | * RETURN: Status | |
484 | * | |
f3d2e786 BM |
485 | * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in |
486 | * the RSDT/XSDT. | |
1da177e4 LT |
487 | * |
488 | ******************************************************************************/ | |
f3d2e786 | 489 | static acpi_status acpi_tb_load_namespace(void) |
1da177e4 | 490 | { |
4be44fcd | 491 | acpi_status status; |
f3d2e786 BM |
492 | struct acpi_table_header *table; |
493 | acpi_native_uint i; | |
1da177e4 | 494 | |
f3d2e786 | 495 | ACPI_FUNCTION_TRACE(tb_load_namespace); |
1da177e4 | 496 | |
f3d2e786 | 497 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
1da177e4 | 498 | |
f3d2e786 BM |
499 | /* |
500 | * Load the namespace. The DSDT is required, but any SSDT and PSDT tables | |
501 | * are optional. | |
502 | */ | |
503 | if (!acpi_gbl_root_table_list.count || | |
504 | !ACPI_COMPARE_NAME(& | |
505 | (acpi_gbl_root_table_list. | |
506 | tables[ACPI_TABLE_INDEX_DSDT].signature), | |
507 | ACPI_SIG_DSDT) | |
508 | || | |
509 | ACPI_FAILURE(acpi_tb_verify_table | |
510 | (&acpi_gbl_root_table_list. | |
511 | tables[ACPI_TABLE_INDEX_DSDT]))) { | |
512 | status = AE_NO_ACPI_TABLES; | |
513 | goto unlock_and_exit; | |
1da177e4 LT |
514 | } |
515 | ||
f3d2e786 BM |
516 | /* |
517 | * Find DSDT table | |
518 | */ | |
519 | status = | |
520 | acpi_os_table_override(acpi_gbl_root_table_list. | |
521 | tables[ACPI_TABLE_INDEX_DSDT].pointer, | |
522 | &table); | |
523 | if (ACPI_SUCCESS(status) && table) { | |
524 | /* | |
525 | * DSDT table has been found | |
526 | */ | |
527 | acpi_tb_delete_table(ACPI_TABLE_INDEX_DSDT); | |
528 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer = | |
529 | table; | |
530 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].length = | |
531 | table->length; | |
532 | acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].flags = | |
533 | ACPI_TABLE_ORIGIN_UNKNOWN; | |
534 | ||
535 | ACPI_INFO((AE_INFO, "Table DSDT replaced by host OS")); | |
536 | acpi_tb_print_table_header(0, table); | |
1da177e4 LT |
537 | } |
538 | ||
f3d2e786 BM |
539 | status = |
540 | acpi_tb_verify_table(&acpi_gbl_root_table_list. | |
541 | tables[ACPI_TABLE_INDEX_DSDT]); | |
542 | if (ACPI_FAILURE(status)) { | |
543 | ||
544 | /* A valid DSDT is required */ | |
1da177e4 | 545 | |
f3d2e786 BM |
546 | status = AE_NO_ACPI_TABLES; |
547 | goto unlock_and_exit; | |
1da177e4 LT |
548 | } |
549 | ||
f3d2e786 | 550 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
1da177e4 | 551 | |
f3d2e786 BM |
552 | /* |
553 | * Load and parse tables. | |
554 | */ | |
555 | status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node); | |
4be44fcd LB |
556 | if (ACPI_FAILURE(status)) { |
557 | return_ACPI_STATUS(status); | |
1da177e4 LT |
558 | } |
559 | ||
560 | /* | |
f3d2e786 | 561 | * Load any SSDT or PSDT tables. Note: Loop leaves tables locked |
1da177e4 | 562 | */ |
f3d2e786 BM |
563 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
564 | for (i = 0; i < acpi_gbl_root_table_list.count; ++i) { | |
565 | if ((!ACPI_COMPARE_NAME | |
566 | (&(acpi_gbl_root_table_list.tables[i].signature), | |
567 | ACPI_SIG_SSDT) | |
568 | && | |
569 | !ACPI_COMPARE_NAME(& | |
570 | (acpi_gbl_root_table_list.tables[i]. | |
571 | signature), ACPI_SIG_PSDT)) | |
572 | || | |
573 | ACPI_FAILURE(acpi_tb_verify_table | |
574 | (&acpi_gbl_root_table_list.tables[i]))) { | |
575 | continue; | |
576 | } | |
577 | ||
578 | /* Ignore errors while loading tables, get as many as possible */ | |
579 | ||
580 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
581 | (void)acpi_ns_load_table(i, acpi_gbl_root_node); | |
582 | (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); | |
1da177e4 LT |
583 | } |
584 | ||
f3d2e786 | 585 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n")); |
1da177e4 | 586 | |
f3d2e786 BM |
587 | unlock_and_exit: |
588 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
589 | return_ACPI_STATUS(status); | |
590 | } | |
52fc0b02 | 591 | |
f3d2e786 BM |
592 | /******************************************************************************* |
593 | * | |
594 | * FUNCTION: acpi_load_tables | |
595 | * | |
596 | * PARAMETERS: None | |
597 | * | |
598 | * RETURN: Status | |
599 | * | |
600 | * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT | |
601 | * | |
602 | ******************************************************************************/ | |
44f6c012 | 603 | |
f3d2e786 BM |
604 | acpi_status acpi_load_tables(void) |
605 | { | |
606 | acpi_status status; | |
1da177e4 | 607 | |
f3d2e786 | 608 | ACPI_FUNCTION_TRACE(acpi_load_tables); |
1da177e4 | 609 | |
f3d2e786 BM |
610 | /* |
611 | * Load the namespace from the tables | |
612 | */ | |
613 | status = acpi_tb_load_namespace(); | |
4be44fcd | 614 | if (ACPI_FAILURE(status)) { |
f3d2e786 BM |
615 | ACPI_EXCEPTION((AE_INFO, status, |
616 | "While loading namespace from ACPI tables")); | |
1da177e4 LT |
617 | } |
618 | ||
f3d2e786 | 619 | return_ACPI_STATUS(status); |
1da177e4 | 620 | } |
1da177e4 | 621 | |
f3d2e786 | 622 | ACPI_EXPORT_SYMBOL(acpi_load_tables) |