Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
42f47869 | 3 | * Module Name: tbutils - ACPI Table utilities |
1da177e4 LT |
4 | * |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, Intel Corp. |
1da177e4 LT |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "actables.h" | |
1da177e4 | 47 | |
1da177e4 | 48 | #define _COMPONENT ACPI_TABLES |
4be44fcd | 49 | ACPI_MODULE_NAME("tbutils") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
a4bbb810 | 52 | static acpi_physical_address |
67a119f9 BM |
53 | acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size); |
54 | ||
9f3119b7 ZY |
55 | /******************************************************************************* |
56 | * | |
57 | * FUNCTION: acpi_tb_check_xsdt | |
58 | * | |
59 | * PARAMETERS: address - Pointer to the XSDT | |
60 | * | |
61 | * RETURN: status | |
62 | * AE_OK - XSDT is okay | |
63 | * AE_NO_MEMORY - can't map XSDT | |
64 | * AE_INVALID_TABLE_LENGTH - invalid table length | |
65 | * AE_NULL_ENTRY - XSDT has NULL entry | |
66 | * | |
67 | * DESCRIPTION: validate XSDT | |
68 | ******************************************************************************/ | |
69 | ||
70 | static acpi_status | |
71 | acpi_tb_check_xsdt(acpi_physical_address address) | |
72 | { | |
73 | struct acpi_table_header *table; | |
74 | u32 length; | |
75 | u64 xsdt_entry_address; | |
76 | u8 *table_entry; | |
77 | u32 table_count; | |
78 | int i; | |
79 | ||
80 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); | |
81 | if (!table) | |
82 | return AE_NO_MEMORY; | |
83 | ||
84 | length = table->length; | |
85 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
86 | if (length < sizeof(struct acpi_table_header)) | |
87 | return AE_INVALID_TABLE_LENGTH; | |
88 | ||
89 | table = acpi_os_map_memory(address, length); | |
90 | if (!table) | |
91 | return AE_NO_MEMORY; | |
92 | ||
93 | /* Calculate the number of tables described in XSDT */ | |
94 | table_count = | |
95 | (u32) ((table->length - | |
96 | sizeof(struct acpi_table_header)) / sizeof(u64)); | |
97 | table_entry = | |
98 | ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); | |
99 | for (i = 0; i < table_count; i++) { | |
100 | ACPI_MOVE_64_TO_64(&xsdt_entry_address, table_entry); | |
101 | if (!xsdt_entry_address) { | |
102 | /* XSDT has NULL entry */ | |
103 | break; | |
104 | } | |
105 | table_entry += sizeof(u64); | |
106 | } | |
107 | acpi_os_unmap_memory(table, length); | |
108 | ||
109 | if (i < table_count) | |
110 | return AE_NULL_ENTRY; | |
111 | else | |
112 | return AE_OK; | |
113 | } | |
a4bbb810 | 114 | |
33620c54 | 115 | #if (!ACPI_REDUCED_HARDWARE) |
009c4cbe BM |
116 | /******************************************************************************* |
117 | * | |
118 | * FUNCTION: acpi_tb_initialize_facs | |
119 | * | |
120 | * PARAMETERS: None | |
121 | * | |
122 | * RETURN: Status | |
123 | * | |
124 | * DESCRIPTION: Create a permanent mapping for the FADT and save it in a global | |
125 | * for accessing the Global Lock and Firmware Waking Vector | |
126 | * | |
127 | ******************************************************************************/ | |
128 | ||
129 | acpi_status acpi_tb_initialize_facs(void) | |
130 | { | |
131 | acpi_status status; | |
132 | ||
22e5b40a BM |
133 | /* If Hardware Reduced flag is set, there is no FACS */ |
134 | ||
135 | if (acpi_gbl_reduced_hardware) { | |
136 | acpi_gbl_FACS = NULL; | |
137 | return (AE_OK); | |
138 | } | |
139 | ||
009c4cbe BM |
140 | status = acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, |
141 | ACPI_CAST_INDIRECT_PTR(struct | |
142 | acpi_table_header, | |
143 | &acpi_gbl_FACS)); | |
9c0d7939 | 144 | return (status); |
009c4cbe | 145 | } |
33620c54 | 146 | #endif /* !ACPI_REDUCED_HARDWARE */ |
009c4cbe | 147 | |
c857303a BM |
148 | /******************************************************************************* |
149 | * | |
150 | * FUNCTION: acpi_tb_tables_loaded | |
151 | * | |
152 | * PARAMETERS: None | |
153 | * | |
154 | * RETURN: TRUE if required ACPI tables are loaded | |
155 | * | |
156 | * DESCRIPTION: Determine if the minimum required ACPI tables are present | |
157 | * (FADT, FACS, DSDT) | |
158 | * | |
159 | ******************************************************************************/ | |
160 | ||
161 | u8 acpi_tb_tables_loaded(void) | |
162 | { | |
163 | ||
b9ee2043 | 164 | if (acpi_gbl_root_table_list.current_table_count >= 3) { |
c857303a BM |
165 | return (TRUE); |
166 | } | |
167 | ||
168 | return (FALSE); | |
169 | } | |
170 | ||
729df0f8 LM |
171 | /******************************************************************************* |
172 | * | |
173 | * FUNCTION: acpi_tb_check_dsdt_header | |
174 | * | |
175 | * PARAMETERS: None | |
176 | * | |
177 | * RETURN: None | |
178 | * | |
179 | * DESCRIPTION: Quick compare to check validity of the DSDT. This will detect | |
180 | * if the DSDT has been replaced from outside the OS and/or if | |
181 | * the DSDT header has been corrupted. | |
182 | * | |
183 | ******************************************************************************/ | |
184 | ||
185 | void acpi_tb_check_dsdt_header(void) | |
186 | { | |
187 | ||
188 | /* Compare original length and checksum to current values */ | |
189 | ||
43323cb4 BM |
190 | if (acpi_gbl_original_dsdt_header.length != acpi_gbl_DSDT->length || |
191 | acpi_gbl_original_dsdt_header.checksum != acpi_gbl_DSDT->checksum) { | |
3b3ea775 BM |
192 | ACPI_BIOS_ERROR((AE_INFO, |
193 | "The DSDT has been corrupted or replaced - " | |
194 | "old, new headers below")); | |
729df0f8 | 195 | acpi_tb_print_table_header(0, &acpi_gbl_original_dsdt_header); |
43323cb4 | 196 | acpi_tb_print_table_header(0, acpi_gbl_DSDT); |
729df0f8 | 197 | |
aa2110cb LM |
198 | ACPI_ERROR((AE_INFO, |
199 | "Please send DMI info to linux-acpi@vger.kernel.org\n" | |
200 | "If system does not work as expected, please boot with acpi=copy_dsdt")); | |
201 | ||
729df0f8 LM |
202 | /* Disable further error messages */ |
203 | ||
43323cb4 | 204 | acpi_gbl_original_dsdt_header.length = acpi_gbl_DSDT->length; |
729df0f8 | 205 | acpi_gbl_original_dsdt_header.checksum = |
43323cb4 | 206 | acpi_gbl_DSDT->checksum; |
729df0f8 LM |
207 | } |
208 | } | |
209 | ||
69ec87ef LM |
210 | /******************************************************************************* |
211 | * | |
212 | * FUNCTION: acpi_tb_copy_dsdt | |
213 | * | |
214 | * PARAMETERS: table_desc - Installed table to copy | |
215 | * | |
216 | * RETURN: None | |
217 | * | |
218 | * DESCRIPTION: Implements a subsystem option to copy the DSDT to local memory. | |
219 | * Some very bad BIOSs are known to either corrupt the DSDT or | |
220 | * install a new, bad DSDT. This copy works around the problem. | |
221 | * | |
222 | ******************************************************************************/ | |
223 | ||
43323cb4 | 224 | struct acpi_table_header *acpi_tb_copy_dsdt(u32 table_index) |
69ec87ef LM |
225 | { |
226 | struct acpi_table_header *new_table; | |
43323cb4 BM |
227 | struct acpi_table_desc *table_desc; |
228 | ||
229 | table_desc = &acpi_gbl_root_table_list.tables[table_index]; | |
69ec87ef LM |
230 | |
231 | new_table = ACPI_ALLOCATE(table_desc->length); | |
232 | if (!new_table) { | |
233 | ACPI_ERROR((AE_INFO, "Could not copy DSDT of length 0x%X", | |
234 | table_desc->length)); | |
43323cb4 | 235 | return (NULL); |
69ec87ef LM |
236 | } |
237 | ||
238 | ACPI_MEMCPY(new_table, table_desc->pointer, table_desc->length); | |
239 | acpi_tb_delete_table(table_desc); | |
240 | table_desc->pointer = new_table; | |
241 | table_desc->flags = ACPI_TABLE_ORIGIN_ALLOCATED; | |
242 | ||
243 | ACPI_INFO((AE_INFO, | |
244 | "Forced DSDT copy: length 0x%05X copied locally, original unmapped", | |
245 | new_table->length)); | |
43323cb4 BM |
246 | |
247 | return (new_table); | |
69ec87ef LM |
248 | } |
249 | ||
1da177e4 LT |
250 | /******************************************************************************* |
251 | * | |
c5fc42ac | 252 | * FUNCTION: acpi_tb_install_table |
1da177e4 | 253 | * |
ba494bee BM |
254 | * PARAMETERS: address - Physical address of DSDT or FACS |
255 | * signature - Table signature, NULL if no need to | |
c5fc42ac BM |
256 | * match |
257 | * table_index - Index into root table array | |
1da177e4 | 258 | * |
c5fc42ac | 259 | * RETURN: None |
1da177e4 | 260 | * |
ac5f98db | 261 | * DESCRIPTION: Install an ACPI table into the global data structure. The |
f7b004a1 | 262 | * table override mechanism is called to allow the host |
ac5f98db BM |
263 | * OS to replace any table before it is installed in the root |
264 | * table array. | |
1da177e4 LT |
265 | * |
266 | ******************************************************************************/ | |
267 | ||
765ec201 | 268 | void |
c5fc42ac | 269 | acpi_tb_install_table(acpi_physical_address address, |
97cbb7d1 | 270 | char *signature, u32 table_index) |
1da177e4 | 271 | { |
f7b004a1 BM |
272 | struct acpi_table_header *table; |
273 | struct acpi_table_header *final_table; | |
274 | struct acpi_table_desc *table_desc; | |
f3d2e786 | 275 | |
c5fc42ac BM |
276 | if (!address) { |
277 | ACPI_ERROR((AE_INFO, | |
278 | "Null physical address for ACPI table [%s]", | |
279 | signature)); | |
280 | return; | |
f3d2e786 BM |
281 | } |
282 | ||
c5fc42ac BM |
283 | /* Map just the table header */ |
284 | ||
f7b004a1 BM |
285 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); |
286 | if (!table) { | |
287 | ACPI_ERROR((AE_INFO, | |
288 | "Could not map memory for table [%s] at %p", | |
289 | signature, ACPI_CAST_PTR(void, address))); | |
c5fc42ac BM |
290 | return; |
291 | } | |
292 | ||
ac5f98db | 293 | /* If a particular signature is expected (DSDT/FACS), it must match */ |
c5fc42ac | 294 | |
f7b004a1 | 295 | if (signature && !ACPI_COMPARE_NAME(table->signature, signature)) { |
3b3ea775 BM |
296 | ACPI_BIOS_ERROR((AE_INFO, |
297 | "Invalid signature 0x%X for ACPI table, expected [%s]", | |
298 | *ACPI_CAST_PTR(u32, table->signature), | |
299 | signature)); | |
c5fc42ac | 300 | goto unmap_and_exit; |
f3d2e786 BM |
301 | } |
302 | ||
f7b004a1 BM |
303 | /* |
304 | * Initialize the table entry. Set the pointer to NULL, since the | |
305 | * table is not fully mapped at this time. | |
306 | */ | |
307 | table_desc = &acpi_gbl_root_table_list.tables[table_index]; | |
308 | ||
309 | table_desc->address = address; | |
310 | table_desc->pointer = NULL; | |
311 | table_desc->length = table->length; | |
312 | table_desc->flags = ACPI_TABLE_ORIGIN_MAPPED; | |
313 | ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature); | |
314 | ||
ac5f98db BM |
315 | /* |
316 | * ACPI Table Override: | |
317 | * | |
318 | * Before we install the table, let the host OS override it with a new | |
319 | * one if desired. Any table within the RSDT/XSDT can be replaced, | |
320 | * including the DSDT which is pointed to by the FADT. | |
f7b004a1 BM |
321 | * |
322 | * NOTE: If the table is overridden, then final_table will contain a | |
323 | * mapped pointer to the full new table. If the table is not overridden, | |
324 | * or if there has been a physical override, then the table will be | |
325 | * fully mapped later (in verify table). In any case, we must | |
326 | * unmap the header that was mapped above. | |
ac5f98db | 327 | */ |
f7b004a1 BM |
328 | final_table = acpi_tb_table_override(table, table_desc); |
329 | if (!final_table) { | |
330 | final_table = table; /* There was no override */ | |
ac5f98db BM |
331 | } |
332 | ||
f7b004a1 | 333 | acpi_tb_print_table_header(table_desc->address, final_table); |
c5fc42ac | 334 | |
f7b004a1 | 335 | /* Set the global integer width (based upon revision of the DSDT) */ |
f3d2e786 | 336 | |
c5fc42ac | 337 | if (table_index == ACPI_TABLE_INDEX_DSDT) { |
f7b004a1 BM |
338 | acpi_ut_set_integer_width(final_table->revision); |
339 | } | |
f3d2e786 | 340 | |
f7b004a1 BM |
341 | /* |
342 | * If we have a physical override during this early loading of the ACPI | |
343 | * tables, unmap the table for now. It will be mapped again later when | |
344 | * it is actually used. This supports very early loading of ACPI tables, | |
345 | * before virtual memory is fully initialized and running within the | |
346 | * host OS. Note: A logical override has the ACPI_TABLE_ORIGIN_OVERRIDE | |
347 | * flag set and will not be deleted below. | |
348 | */ | |
349 | if (final_table != table) { | |
350 | acpi_tb_delete_table(table_desc); | |
c5fc42ac BM |
351 | } |
352 | ||
353 | unmap_and_exit: | |
f7b004a1 BM |
354 | |
355 | /* Always unmap the table header that we mapped above */ | |
356 | ||
357 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
c5fc42ac | 358 | } |
f3d2e786 | 359 | |
a4bbb810 BM |
360 | /******************************************************************************* |
361 | * | |
362 | * FUNCTION: acpi_tb_get_root_table_entry | |
363 | * | |
364 | * PARAMETERS: table_entry - Pointer to the RSDT/XSDT table entry | |
365 | * table_entry_size - sizeof 32 or 64 (RSDT or XSDT) | |
366 | * | |
367 | * RETURN: Physical address extracted from the root table | |
368 | * | |
369 | * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on | |
370 | * both 32-bit and 64-bit platforms | |
371 | * | |
372 | * NOTE: acpi_physical_address is 32-bit on 32-bit platforms, 64-bit on | |
373 | * 64-bit platforms. | |
374 | * | |
375 | ******************************************************************************/ | |
376 | ||
377 | static acpi_physical_address | |
67a119f9 | 378 | acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size) |
a4bbb810 BM |
379 | { |
380 | u64 address64; | |
381 | ||
382 | /* | |
383 | * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): | |
384 | * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT | |
385 | */ | |
386 | if (table_entry_size == sizeof(u32)) { | |
387 | /* | |
388 | * 32-bit platform, RSDT: Return 32-bit table entry | |
389 | * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return | |
390 | */ | |
391 | return ((acpi_physical_address) | |
392 | (*ACPI_CAST_PTR(u32, table_entry))); | |
393 | } else { | |
394 | /* | |
395 | * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return | |
ec41f193 BM |
396 | * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, |
397 | * return 64-bit | |
a4bbb810 BM |
398 | */ |
399 | ACPI_MOVE_64_TO_64(&address64, table_entry); | |
400 | ||
401 | #if ACPI_MACHINE_WIDTH == 32 | |
402 | if (address64 > ACPI_UINT32_MAX) { | |
403 | ||
ea5d8ebc | 404 | /* Will truncate 64-bit address to 32 bits, issue warning */ |
a4bbb810 | 405 | |
3b3ea775 BM |
406 | ACPI_BIOS_WARNING((AE_INFO, |
407 | "64-bit Physical Address in XSDT is too large (0x%8.8X%8.8X)," | |
408 | " truncating", | |
409 | ACPI_FORMAT_UINT64(address64))); | |
a4bbb810 BM |
410 | } |
411 | #endif | |
412 | return ((acpi_physical_address) (address64)); | |
413 | } | |
414 | } | |
415 | ||
793c2388 BM |
416 | /******************************************************************************* |
417 | * | |
f3d2e786 | 418 | * FUNCTION: acpi_tb_parse_root_table |
793c2388 | 419 | * |
ba494bee | 420 | * PARAMETERS: rsdp - Pointer to the RSDP |
f3d2e786 BM |
421 | * |
422 | * RETURN: Status | |
793c2388 | 423 | * |
f3d2e786 BM |
424 | * DESCRIPTION: This function is called to parse the Root System Description |
425 | * Table (RSDT or XSDT) | |
793c2388 | 426 | * |
f3d2e786 BM |
427 | * NOTE: Tables are mapped (not copied) for efficiency. The FACS must |
428 | * be mapped and cannot be copied because it contains the actual | |
429 | * memory location of the ACPI Global Lock. | |
793c2388 BM |
430 | * |
431 | ******************************************************************************/ | |
432 | ||
ad71860a | 433 | acpi_status __init |
97cbb7d1 | 434 | acpi_tb_parse_root_table(acpi_physical_address rsdp_address) |
793c2388 | 435 | { |
c5fc42ac | 436 | struct acpi_table_rsdp *rsdp; |
67a119f9 BM |
437 | u32 table_entry_size; |
438 | u32 i; | |
c5fc42ac | 439 | u32 table_count; |
f3d2e786 BM |
440 | struct acpi_table_header *table; |
441 | acpi_physical_address address; | |
8ab7367f | 442 | acpi_physical_address uninitialized_var(rsdt_address); |
f3d2e786 BM |
443 | u32 length; |
444 | u8 *table_entry; | |
f3d2e786 BM |
445 | acpi_status status; |
446 | ||
447 | ACPI_FUNCTION_TRACE(tb_parse_root_table); | |
448 | ||
c5fc42ac BM |
449 | /* |
450 | * Map the entire RSDP and extract the address of the RSDT or XSDT | |
451 | */ | |
452 | rsdp = acpi_os_map_memory(rsdp_address, sizeof(struct acpi_table_rsdp)); | |
453 | if (!rsdp) { | |
454 | return_ACPI_STATUS(AE_NO_MEMORY); | |
455 | } | |
456 | ||
457 | acpi_tb_print_table_header(rsdp_address, | |
458 | ACPI_CAST_PTR(struct acpi_table_header, | |
459 | rsdp)); | |
460 | ||
f3d2e786 BM |
461 | /* Differentiate between RSDT and XSDT root tables */ |
462 | ||
237889bf ZY |
463 | if (rsdp->revision > 1 && rsdp->xsdt_physical_address |
464 | && !acpi_rsdt_forced) { | |
f3d2e786 BM |
465 | /* |
466 | * Root table is an XSDT (64-bit physical addresses). We must use the | |
467 | * XSDT if the revision is > 1 and the XSDT pointer is present, as per | |
468 | * the ACPI specification. | |
469 | */ | |
c5fc42ac BM |
470 | address = (acpi_physical_address) rsdp->xsdt_physical_address; |
471 | table_entry_size = sizeof(u64); | |
9f3119b7 ZY |
472 | rsdt_address = (acpi_physical_address) |
473 | rsdp->rsdt_physical_address; | |
f3d2e786 BM |
474 | } else { |
475 | /* Root table is an RSDT (32-bit physical addresses) */ | |
476 | ||
c5fc42ac BM |
477 | address = (acpi_physical_address) rsdp->rsdt_physical_address; |
478 | table_entry_size = sizeof(u32); | |
f3d2e786 | 479 | } |
793c2388 | 480 | |
c5fc42ac BM |
481 | /* |
482 | * It is not possible to map more than one entry in some environments, | |
483 | * so unmap the RSDP here before mapping other tables | |
484 | */ | |
485 | acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp)); | |
486 | ||
9f3119b7 ZY |
487 | if (table_entry_size == sizeof(u64)) { |
488 | if (acpi_tb_check_xsdt(address) == AE_NULL_ENTRY) { | |
489 | /* XSDT has NULL entry, RSDT is used */ | |
490 | address = rsdt_address; | |
491 | table_entry_size = sizeof(u32); | |
4fdb2a05 | 492 | ACPI_WARNING((AE_INFO, "BIOS XSDT has NULL entry, " |
9f3119b7 ZY |
493 | "using RSDT")); |
494 | } | |
495 | } | |
c5fc42ac | 496 | /* Map the RSDT/XSDT table header to get the full table length */ |
793c2388 | 497 | |
f3d2e786 BM |
498 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); |
499 | if (!table) { | |
c5fc42ac | 500 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
501 | } |
502 | ||
c5fc42ac BM |
503 | acpi_tb_print_table_header(address, table); |
504 | ||
f3d2e786 BM |
505 | /* Get the length of the full table, verify length and map entire table */ |
506 | ||
507 | length = table->length; | |
508 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
509 | ||
510 | if (length < sizeof(struct acpi_table_header)) { | |
3b3ea775 BM |
511 | ACPI_BIOS_ERROR((AE_INFO, |
512 | "Invalid table length 0x%X in RSDT/XSDT", | |
513 | length)); | |
c5fc42ac | 514 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
f3d2e786 BM |
515 | } |
516 | ||
517 | table = acpi_os_map_memory(address, length); | |
518 | if (!table) { | |
c5fc42ac | 519 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
520 | } |
521 | ||
522 | /* Validate the root table checksum */ | |
523 | ||
c5fc42ac BM |
524 | status = acpi_tb_verify_checksum(table, length); |
525 | if (ACPI_FAILURE(status)) { | |
f3d2e786 | 526 | acpi_os_unmap_memory(table, length); |
c5fc42ac | 527 | return_ACPI_STATUS(status); |
f3d2e786 | 528 | } |
f3d2e786 BM |
529 | |
530 | /* Calculate the number of tables described in the root table */ | |
531 | ||
ec41f193 BM |
532 | table_count = (u32)((table->length - sizeof(struct acpi_table_header)) / |
533 | table_entry_size); | |
c5fc42ac | 534 | /* |
ec41f193 BM |
535 | * First two entries in the table array are reserved for the DSDT |
536 | * and FACS, which are not actually present in the RSDT/XSDT - they | |
537 | * come from the FADT | |
c5fc42ac | 538 | */ |
f3d2e786 BM |
539 | table_entry = |
540 | ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); | |
b9ee2043 | 541 | acpi_gbl_root_table_list.current_table_count = 2; |
1da177e4 | 542 | |
f3d2e786 | 543 | /* |
c5fc42ac | 544 | * Initialize the root table array from the RSDT/XSDT |
f3d2e786 | 545 | */ |
c5fc42ac | 546 | for (i = 0; i < table_count; i++) { |
b9ee2043 BM |
547 | if (acpi_gbl_root_table_list.current_table_count >= |
548 | acpi_gbl_root_table_list.max_table_count) { | |
c5fc42ac BM |
549 | |
550 | /* There is no more room in the root table array, attempt resize */ | |
551 | ||
f3d2e786 BM |
552 | status = acpi_tb_resize_root_table_list(); |
553 | if (ACPI_FAILURE(status)) { | |
554 | ACPI_WARNING((AE_INFO, | |
555 | "Truncating %u table entries!", | |
386e4a83 MS |
556 | (unsigned) (table_count - |
557 | (acpi_gbl_root_table_list. | |
b9ee2043 BM |
558 | current_table_count - |
559 | 2)))); | |
f3d2e786 BM |
560 | break; |
561 | } | |
562 | } | |
563 | ||
a4bbb810 BM |
564 | /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ |
565 | ||
b9ee2043 BM |
566 | acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list. |
567 | current_table_count].address = | |
a4bbb810 | 568 | acpi_tb_get_root_table_entry(table_entry, table_entry_size); |
f3d2e786 | 569 | |
c5fc42ac | 570 | table_entry += table_entry_size; |
b9ee2043 | 571 | acpi_gbl_root_table_list.current_table_count++; |
1da177e4 | 572 | } |
793c2388 | 573 | |
f3d2e786 BM |
574 | /* |
575 | * It is not possible to map more than one entry in some environments, | |
576 | * so unmap the root table here before mapping other tables | |
577 | */ | |
578 | acpi_os_unmap_memory(table, length); | |
579 | ||
c5fc42ac BM |
580 | /* |
581 | * Complete the initialization of the root table array by examining | |
582 | * the header of each table | |
583 | */ | |
b9ee2043 | 584 | for (i = 2; i < acpi_gbl_root_table_list.current_table_count; i++) { |
c5fc42ac | 585 | acpi_tb_install_table(acpi_gbl_root_table_list.tables[i]. |
97cbb7d1 | 586 | address, NULL, i); |
f3d2e786 | 587 | |
c5fc42ac | 588 | /* Special case for FADT - get the DSDT and FACS */ |
f3d2e786 | 589 | |
c5fc42ac BM |
590 | if (ACPI_COMPARE_NAME |
591 | (&acpi_gbl_root_table_list.tables[i].signature, | |
592 | ACPI_SIG_FADT)) { | |
97cbb7d1 | 593 | acpi_tb_parse_fadt(i); |
f3d2e786 BM |
594 | } |
595 | } | |
596 | ||
597 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 598 | } |