Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
f3d2e786 | 3 | * Module Name: tbutils - table utilities |
1da177e4 LT |
4 | * |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
77848130 | 8 | * Copyright (C) 2000 - 2012, 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 */ |
cf02cd47 BM |
52 | static void acpi_tb_fix_string(char *string, acpi_size length); |
53 | ||
54 | static void | |
55 | acpi_tb_cleanup_table_header(struct acpi_table_header *out_header, | |
56 | struct acpi_table_header *header); | |
57 | ||
a4bbb810 | 58 | static acpi_physical_address |
67a119f9 BM |
59 | acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size); |
60 | ||
9f3119b7 ZY |
61 | /******************************************************************************* |
62 | * | |
63 | * FUNCTION: acpi_tb_check_xsdt | |
64 | * | |
65 | * PARAMETERS: address - Pointer to the XSDT | |
66 | * | |
67 | * RETURN: status | |
68 | * AE_OK - XSDT is okay | |
69 | * AE_NO_MEMORY - can't map XSDT | |
70 | * AE_INVALID_TABLE_LENGTH - invalid table length | |
71 | * AE_NULL_ENTRY - XSDT has NULL entry | |
72 | * | |
73 | * DESCRIPTION: validate XSDT | |
74 | ******************************************************************************/ | |
75 | ||
76 | static acpi_status | |
77 | acpi_tb_check_xsdt(acpi_physical_address address) | |
78 | { | |
79 | struct acpi_table_header *table; | |
80 | u32 length; | |
81 | u64 xsdt_entry_address; | |
82 | u8 *table_entry; | |
83 | u32 table_count; | |
84 | int i; | |
85 | ||
86 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); | |
87 | if (!table) | |
88 | return AE_NO_MEMORY; | |
89 | ||
90 | length = table->length; | |
91 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
92 | if (length < sizeof(struct acpi_table_header)) | |
93 | return AE_INVALID_TABLE_LENGTH; | |
94 | ||
95 | table = acpi_os_map_memory(address, length); | |
96 | if (!table) | |
97 | return AE_NO_MEMORY; | |
98 | ||
99 | /* Calculate the number of tables described in XSDT */ | |
100 | table_count = | |
101 | (u32) ((table->length - | |
102 | sizeof(struct acpi_table_header)) / sizeof(u64)); | |
103 | table_entry = | |
104 | ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); | |
105 | for (i = 0; i < table_count; i++) { | |
106 | ACPI_MOVE_64_TO_64(&xsdt_entry_address, table_entry); | |
107 | if (!xsdt_entry_address) { | |
108 | /* XSDT has NULL entry */ | |
109 | break; | |
110 | } | |
111 | table_entry += sizeof(u64); | |
112 | } | |
113 | acpi_os_unmap_memory(table, length); | |
114 | ||
115 | if (i < table_count) | |
116 | return AE_NULL_ENTRY; | |
117 | else | |
118 | return AE_OK; | |
119 | } | |
a4bbb810 | 120 | |
33620c54 | 121 | #if (!ACPI_REDUCED_HARDWARE) |
009c4cbe BM |
122 | /******************************************************************************* |
123 | * | |
124 | * FUNCTION: acpi_tb_initialize_facs | |
125 | * | |
126 | * PARAMETERS: None | |
127 | * | |
128 | * RETURN: Status | |
129 | * | |
130 | * DESCRIPTION: Create a permanent mapping for the FADT and save it in a global | |
131 | * for accessing the Global Lock and Firmware Waking Vector | |
132 | * | |
133 | ******************************************************************************/ | |
134 | ||
135 | acpi_status acpi_tb_initialize_facs(void) | |
136 | { | |
137 | acpi_status status; | |
138 | ||
22e5b40a BM |
139 | /* If Hardware Reduced flag is set, there is no FACS */ |
140 | ||
141 | if (acpi_gbl_reduced_hardware) { | |
142 | acpi_gbl_FACS = NULL; | |
143 | return (AE_OK); | |
144 | } | |
145 | ||
009c4cbe BM |
146 | status = acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, |
147 | ACPI_CAST_INDIRECT_PTR(struct | |
148 | acpi_table_header, | |
149 | &acpi_gbl_FACS)); | |
150 | return status; | |
151 | } | |
33620c54 | 152 | #endif /* !ACPI_REDUCED_HARDWARE */ |
009c4cbe | 153 | |
c857303a BM |
154 | /******************************************************************************* |
155 | * | |
156 | * FUNCTION: acpi_tb_tables_loaded | |
157 | * | |
158 | * PARAMETERS: None | |
159 | * | |
160 | * RETURN: TRUE if required ACPI tables are loaded | |
161 | * | |
162 | * DESCRIPTION: Determine if the minimum required ACPI tables are present | |
163 | * (FADT, FACS, DSDT) | |
164 | * | |
165 | ******************************************************************************/ | |
166 | ||
167 | u8 acpi_tb_tables_loaded(void) | |
168 | { | |
169 | ||
b9ee2043 | 170 | if (acpi_gbl_root_table_list.current_table_count >= 3) { |
c857303a BM |
171 | return (TRUE); |
172 | } | |
173 | ||
174 | return (FALSE); | |
175 | } | |
176 | ||
cf02cd47 BM |
177 | /******************************************************************************* |
178 | * | |
179 | * FUNCTION: acpi_tb_fix_string | |
180 | * | |
ba494bee BM |
181 | * PARAMETERS: string - String to be repaired |
182 | * length - Maximum length | |
cf02cd47 BM |
183 | * |
184 | * RETURN: None | |
185 | * | |
186 | * DESCRIPTION: Replace every non-printable or non-ascii byte in the string | |
187 | * with a question mark '?'. | |
188 | * | |
189 | ******************************************************************************/ | |
190 | ||
191 | static void acpi_tb_fix_string(char *string, acpi_size length) | |
192 | { | |
193 | ||
194 | while (length && *string) { | |
195 | if (!ACPI_IS_PRINT(*string)) { | |
196 | *string = '?'; | |
197 | } | |
198 | string++; | |
199 | length--; | |
200 | } | |
201 | } | |
202 | ||
203 | /******************************************************************************* | |
204 | * | |
205 | * FUNCTION: acpi_tb_cleanup_table_header | |
206 | * | |
207 | * PARAMETERS: out_header - Where the cleaned header is returned | |
ba494bee | 208 | * header - Input ACPI table header |
cf02cd47 BM |
209 | * |
210 | * RETURN: Returns the cleaned header in out_header | |
211 | * | |
212 | * DESCRIPTION: Copy the table header and ensure that all "string" fields in | |
213 | * the header consist of printable characters. | |
214 | * | |
215 | ******************************************************************************/ | |
216 | ||
217 | static void | |
218 | acpi_tb_cleanup_table_header(struct acpi_table_header *out_header, | |
219 | struct acpi_table_header *header) | |
220 | { | |
221 | ||
222 | ACPI_MEMCPY(out_header, header, sizeof(struct acpi_table_header)); | |
223 | ||
224 | acpi_tb_fix_string(out_header->signature, ACPI_NAME_SIZE); | |
225 | acpi_tb_fix_string(out_header->oem_id, ACPI_OEM_ID_SIZE); | |
226 | acpi_tb_fix_string(out_header->oem_table_id, ACPI_OEM_TABLE_ID_SIZE); | |
227 | acpi_tb_fix_string(out_header->asl_compiler_id, ACPI_NAME_SIZE); | |
228 | } | |
229 | ||
0c9938cc RM |
230 | /******************************************************************************* |
231 | * | |
f3d2e786 | 232 | * FUNCTION: acpi_tb_print_table_header |
0c9938cc | 233 | * |
ba494bee BM |
234 | * PARAMETERS: address - Table physical address |
235 | * header - Table header | |
0c9938cc | 236 | * |
f3d2e786 | 237 | * RETURN: None |
0c9938cc | 238 | * |
c5fc42ac | 239 | * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP. |
0c9938cc RM |
240 | * |
241 | ******************************************************************************/ | |
242 | ||
f3d2e786 BM |
243 | void |
244 | acpi_tb_print_table_header(acpi_physical_address address, | |
245 | struct acpi_table_header *header) | |
0c9938cc | 246 | { |
cf02cd47 | 247 | struct acpi_table_header local_header; |
0c9938cc | 248 | |
b6bc342d BM |
249 | /* |
250 | * The reason that the Address is cast to a void pointer is so that we | |
251 | * can use %p which will work properly on both 32-bit and 64-bit hosts. | |
252 | */ | |
c5fc42ac BM |
253 | if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) { |
254 | ||
b6bc342d | 255 | /* FACS only has signature and length fields */ |
c5fc42ac | 256 | |
b6bc342d BM |
257 | ACPI_INFO((AE_INFO, "%4.4s %p %05X", |
258 | header->signature, ACPI_CAST_PTR(void, address), | |
c5fc42ac BM |
259 | header->length)); |
260 | } else if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_RSDP)) { | |
261 | ||
262 | /* RSDP has no common fields */ | |
263 | ||
cf02cd47 BM |
264 | ACPI_MEMCPY(local_header.oem_id, |
265 | ACPI_CAST_PTR(struct acpi_table_rsdp, | |
266 | header)->oem_id, ACPI_OEM_ID_SIZE); | |
267 | acpi_tb_fix_string(local_header.oem_id, ACPI_OEM_ID_SIZE); | |
268 | ||
b6bc342d BM |
269 | ACPI_INFO((AE_INFO, "RSDP %p %05X (v%.2d %6.6s)", |
270 | ACPI_CAST_PTR (void, address), | |
a4bbb810 BM |
271 | (ACPI_CAST_PTR(struct acpi_table_rsdp, header)-> |
272 | revision > | |
273 | 0) ? ACPI_CAST_PTR(struct acpi_table_rsdp, | |
274 | header)->length : 20, | |
275 | ACPI_CAST_PTR(struct acpi_table_rsdp, | |
276 | header)->revision, | |
cf02cd47 | 277 | local_header.oem_id)); |
c5fc42ac | 278 | } else { |
4bf27393 BM |
279 | /* Standard ACPI table with full common header */ |
280 | ||
cf02cd47 BM |
281 | acpi_tb_cleanup_table_header(&local_header, header); |
282 | ||
c5fc42ac | 283 | ACPI_INFO((AE_INFO, |
b6bc342d | 284 | "%4.4s %p %05X (v%.2d %6.6s %8.8s %08X %4.4s %08X)", |
cf02cd47 BM |
285 | local_header.signature, ACPI_CAST_PTR(void, address), |
286 | local_header.length, local_header.revision, | |
287 | local_header.oem_id, local_header.oem_table_id, | |
288 | local_header.oem_revision, | |
289 | local_header.asl_compiler_id, | |
290 | local_header.asl_compiler_revision)); | |
291 | ||
c5fc42ac | 292 | } |
0c9938cc RM |
293 | } |
294 | ||
c5fc42ac BM |
295 | /******************************************************************************* |
296 | * | |
297 | * FUNCTION: acpi_tb_validate_checksum | |
298 | * | |
ba494bee BM |
299 | * PARAMETERS: table - ACPI table to verify |
300 | * length - Length of entire table | |
c5fc42ac BM |
301 | * |
302 | * RETURN: Status | |
303 | * | |
304 | * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns | |
305 | * exception on bad checksum. | |
306 | * | |
307 | ******************************************************************************/ | |
308 | ||
309 | acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length) | |
310 | { | |
311 | u8 checksum; | |
312 | ||
313 | /* Compute the checksum on the table */ | |
314 | ||
315 | checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length); | |
316 | ||
317 | /* Checksum ok? (should be zero) */ | |
318 | ||
319 | if (checksum) { | |
3b3ea775 BM |
320 | ACPI_BIOS_WARNING((AE_INFO, |
321 | "Incorrect checksum in table [%4.4s] - 0x%2.2X, " | |
322 | "should be 0x%2.2X", | |
323 | table->signature, table->checksum, | |
324 | (u8)(table->checksum - checksum))); | |
c5fc42ac BM |
325 | |
326 | #if (ACPI_CHECKSUM_ABORT) | |
327 | ||
328 | return (AE_BAD_CHECKSUM); | |
329 | #endif | |
330 | } | |
331 | ||
332 | return (AE_OK); | |
333 | } | |
334 | ||
1da177e4 LT |
335 | /******************************************************************************* |
336 | * | |
f3d2e786 | 337 | * FUNCTION: acpi_tb_checksum |
1da177e4 | 338 | * |
ba494bee BM |
339 | * PARAMETERS: buffer - Pointer to memory region to be checked |
340 | * length - Length of this memory region | |
1da177e4 | 341 | * |
f3d2e786 | 342 | * RETURN: Checksum (u8) |
1da177e4 | 343 | * |
f3d2e786 | 344 | * DESCRIPTION: Calculates circular checksum of memory region. |
1da177e4 LT |
345 | * |
346 | ******************************************************************************/ | |
347 | ||
67a119f9 | 348 | u8 acpi_tb_checksum(u8 *buffer, u32 length) |
793c2388 | 349 | { |
793c2388 | 350 | u8 sum = 0; |
f3d2e786 | 351 | u8 *end = buffer + length; |
793c2388 | 352 | |
f3d2e786 BM |
353 | while (buffer < end) { |
354 | sum = (u8) (sum + *(buffer++)); | |
793c2388 BM |
355 | } |
356 | ||
68aafc35 | 357 | return (sum); |
793c2388 BM |
358 | } |
359 | ||
729df0f8 LM |
360 | /******************************************************************************* |
361 | * | |
362 | * FUNCTION: acpi_tb_check_dsdt_header | |
363 | * | |
364 | * PARAMETERS: None | |
365 | * | |
366 | * RETURN: None | |
367 | * | |
368 | * DESCRIPTION: Quick compare to check validity of the DSDT. This will detect | |
369 | * if the DSDT has been replaced from outside the OS and/or if | |
370 | * the DSDT header has been corrupted. | |
371 | * | |
372 | ******************************************************************************/ | |
373 | ||
374 | void acpi_tb_check_dsdt_header(void) | |
375 | { | |
376 | ||
377 | /* Compare original length and checksum to current values */ | |
378 | ||
43323cb4 BM |
379 | if (acpi_gbl_original_dsdt_header.length != acpi_gbl_DSDT->length || |
380 | acpi_gbl_original_dsdt_header.checksum != acpi_gbl_DSDT->checksum) { | |
3b3ea775 BM |
381 | ACPI_BIOS_ERROR((AE_INFO, |
382 | "The DSDT has been corrupted or replaced - " | |
383 | "old, new headers below")); | |
729df0f8 | 384 | acpi_tb_print_table_header(0, &acpi_gbl_original_dsdt_header); |
43323cb4 | 385 | acpi_tb_print_table_header(0, acpi_gbl_DSDT); |
729df0f8 | 386 | |
aa2110cb LM |
387 | ACPI_ERROR((AE_INFO, |
388 | "Please send DMI info to linux-acpi@vger.kernel.org\n" | |
389 | "If system does not work as expected, please boot with acpi=copy_dsdt")); | |
390 | ||
729df0f8 LM |
391 | /* Disable further error messages */ |
392 | ||
43323cb4 | 393 | acpi_gbl_original_dsdt_header.length = acpi_gbl_DSDT->length; |
729df0f8 | 394 | acpi_gbl_original_dsdt_header.checksum = |
43323cb4 | 395 | acpi_gbl_DSDT->checksum; |
729df0f8 LM |
396 | } |
397 | } | |
398 | ||
69ec87ef LM |
399 | /******************************************************************************* |
400 | * | |
401 | * FUNCTION: acpi_tb_copy_dsdt | |
402 | * | |
403 | * PARAMETERS: table_desc - Installed table to copy | |
404 | * | |
405 | * RETURN: None | |
406 | * | |
407 | * DESCRIPTION: Implements a subsystem option to copy the DSDT to local memory. | |
408 | * Some very bad BIOSs are known to either corrupt the DSDT or | |
409 | * install a new, bad DSDT. This copy works around the problem. | |
410 | * | |
411 | ******************************************************************************/ | |
412 | ||
43323cb4 | 413 | struct acpi_table_header *acpi_tb_copy_dsdt(u32 table_index) |
69ec87ef LM |
414 | { |
415 | struct acpi_table_header *new_table; | |
43323cb4 BM |
416 | struct acpi_table_desc *table_desc; |
417 | ||
418 | table_desc = &acpi_gbl_root_table_list.tables[table_index]; | |
69ec87ef LM |
419 | |
420 | new_table = ACPI_ALLOCATE(table_desc->length); | |
421 | if (!new_table) { | |
422 | ACPI_ERROR((AE_INFO, "Could not copy DSDT of length 0x%X", | |
423 | table_desc->length)); | |
43323cb4 | 424 | return (NULL); |
69ec87ef LM |
425 | } |
426 | ||
427 | ACPI_MEMCPY(new_table, table_desc->pointer, table_desc->length); | |
428 | acpi_tb_delete_table(table_desc); | |
429 | table_desc->pointer = new_table; | |
430 | table_desc->flags = ACPI_TABLE_ORIGIN_ALLOCATED; | |
431 | ||
432 | ACPI_INFO((AE_INFO, | |
433 | "Forced DSDT copy: length 0x%05X copied locally, original unmapped", | |
434 | new_table->length)); | |
43323cb4 BM |
435 | |
436 | return (new_table); | |
69ec87ef LM |
437 | } |
438 | ||
1da177e4 LT |
439 | /******************************************************************************* |
440 | * | |
c5fc42ac | 441 | * FUNCTION: acpi_tb_install_table |
1da177e4 | 442 | * |
ba494bee BM |
443 | * PARAMETERS: address - Physical address of DSDT or FACS |
444 | * signature - Table signature, NULL if no need to | |
c5fc42ac BM |
445 | * match |
446 | * table_index - Index into root table array | |
1da177e4 | 447 | * |
c5fc42ac | 448 | * RETURN: None |
1da177e4 | 449 | * |
ac5f98db | 450 | * DESCRIPTION: Install an ACPI table into the global data structure. The |
f7b004a1 | 451 | * table override mechanism is called to allow the host |
ac5f98db BM |
452 | * OS to replace any table before it is installed in the root |
453 | * table array. | |
1da177e4 LT |
454 | * |
455 | ******************************************************************************/ | |
456 | ||
765ec201 | 457 | void |
c5fc42ac | 458 | acpi_tb_install_table(acpi_physical_address address, |
97cbb7d1 | 459 | char *signature, u32 table_index) |
1da177e4 | 460 | { |
f7b004a1 BM |
461 | struct acpi_table_header *table; |
462 | struct acpi_table_header *final_table; | |
463 | struct acpi_table_desc *table_desc; | |
f3d2e786 | 464 | |
c5fc42ac BM |
465 | if (!address) { |
466 | ACPI_ERROR((AE_INFO, | |
467 | "Null physical address for ACPI table [%s]", | |
468 | signature)); | |
469 | return; | |
f3d2e786 BM |
470 | } |
471 | ||
c5fc42ac BM |
472 | /* Map just the table header */ |
473 | ||
f7b004a1 BM |
474 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); |
475 | if (!table) { | |
476 | ACPI_ERROR((AE_INFO, | |
477 | "Could not map memory for table [%s] at %p", | |
478 | signature, ACPI_CAST_PTR(void, address))); | |
c5fc42ac BM |
479 | return; |
480 | } | |
481 | ||
ac5f98db | 482 | /* If a particular signature is expected (DSDT/FACS), it must match */ |
c5fc42ac | 483 | |
f7b004a1 | 484 | if (signature && !ACPI_COMPARE_NAME(table->signature, signature)) { |
3b3ea775 BM |
485 | ACPI_BIOS_ERROR((AE_INFO, |
486 | "Invalid signature 0x%X for ACPI table, expected [%s]", | |
487 | *ACPI_CAST_PTR(u32, table->signature), | |
488 | signature)); | |
c5fc42ac | 489 | goto unmap_and_exit; |
f3d2e786 BM |
490 | } |
491 | ||
f7b004a1 BM |
492 | /* |
493 | * Initialize the table entry. Set the pointer to NULL, since the | |
494 | * table is not fully mapped at this time. | |
495 | */ | |
496 | table_desc = &acpi_gbl_root_table_list.tables[table_index]; | |
497 | ||
498 | table_desc->address = address; | |
499 | table_desc->pointer = NULL; | |
500 | table_desc->length = table->length; | |
501 | table_desc->flags = ACPI_TABLE_ORIGIN_MAPPED; | |
502 | ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature); | |
503 | ||
ac5f98db BM |
504 | /* |
505 | * ACPI Table Override: | |
506 | * | |
507 | * Before we install the table, let the host OS override it with a new | |
508 | * one if desired. Any table within the RSDT/XSDT can be replaced, | |
509 | * including the DSDT which is pointed to by the FADT. | |
f7b004a1 BM |
510 | * |
511 | * NOTE: If the table is overridden, then final_table will contain a | |
512 | * mapped pointer to the full new table. If the table is not overridden, | |
513 | * or if there has been a physical override, then the table will be | |
514 | * fully mapped later (in verify table). In any case, we must | |
515 | * unmap the header that was mapped above. | |
ac5f98db | 516 | */ |
f7b004a1 BM |
517 | final_table = acpi_tb_table_override(table, table_desc); |
518 | if (!final_table) { | |
519 | final_table = table; /* There was no override */ | |
ac5f98db BM |
520 | } |
521 | ||
f7b004a1 | 522 | acpi_tb_print_table_header(table_desc->address, final_table); |
c5fc42ac | 523 | |
f7b004a1 | 524 | /* Set the global integer width (based upon revision of the DSDT) */ |
f3d2e786 | 525 | |
c5fc42ac | 526 | if (table_index == ACPI_TABLE_INDEX_DSDT) { |
f7b004a1 BM |
527 | acpi_ut_set_integer_width(final_table->revision); |
528 | } | |
f3d2e786 | 529 | |
f7b004a1 BM |
530 | /* |
531 | * If we have a physical override during this early loading of the ACPI | |
532 | * tables, unmap the table for now. It will be mapped again later when | |
533 | * it is actually used. This supports very early loading of ACPI tables, | |
534 | * before virtual memory is fully initialized and running within the | |
535 | * host OS. Note: A logical override has the ACPI_TABLE_ORIGIN_OVERRIDE | |
536 | * flag set and will not be deleted below. | |
537 | */ | |
538 | if (final_table != table) { | |
539 | acpi_tb_delete_table(table_desc); | |
c5fc42ac BM |
540 | } |
541 | ||
542 | unmap_and_exit: | |
f7b004a1 BM |
543 | |
544 | /* Always unmap the table header that we mapped above */ | |
545 | ||
546 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
c5fc42ac | 547 | } |
f3d2e786 | 548 | |
a4bbb810 BM |
549 | /******************************************************************************* |
550 | * | |
551 | * FUNCTION: acpi_tb_get_root_table_entry | |
552 | * | |
553 | * PARAMETERS: table_entry - Pointer to the RSDT/XSDT table entry | |
554 | * table_entry_size - sizeof 32 or 64 (RSDT or XSDT) | |
555 | * | |
556 | * RETURN: Physical address extracted from the root table | |
557 | * | |
558 | * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on | |
559 | * both 32-bit and 64-bit platforms | |
560 | * | |
561 | * NOTE: acpi_physical_address is 32-bit on 32-bit platforms, 64-bit on | |
562 | * 64-bit platforms. | |
563 | * | |
564 | ******************************************************************************/ | |
565 | ||
566 | static acpi_physical_address | |
67a119f9 | 567 | acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size) |
a4bbb810 BM |
568 | { |
569 | u64 address64; | |
570 | ||
571 | /* | |
572 | * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): | |
573 | * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT | |
574 | */ | |
575 | if (table_entry_size == sizeof(u32)) { | |
576 | /* | |
577 | * 32-bit platform, RSDT: Return 32-bit table entry | |
578 | * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return | |
579 | */ | |
580 | return ((acpi_physical_address) | |
581 | (*ACPI_CAST_PTR(u32, table_entry))); | |
582 | } else { | |
583 | /* | |
584 | * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return | |
ec41f193 BM |
585 | * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, |
586 | * return 64-bit | |
a4bbb810 BM |
587 | */ |
588 | ACPI_MOVE_64_TO_64(&address64, table_entry); | |
589 | ||
590 | #if ACPI_MACHINE_WIDTH == 32 | |
591 | if (address64 > ACPI_UINT32_MAX) { | |
592 | ||
ea5d8ebc | 593 | /* Will truncate 64-bit address to 32 bits, issue warning */ |
a4bbb810 | 594 | |
3b3ea775 BM |
595 | ACPI_BIOS_WARNING((AE_INFO, |
596 | "64-bit Physical Address in XSDT is too large (0x%8.8X%8.8X)," | |
597 | " truncating", | |
598 | ACPI_FORMAT_UINT64(address64))); | |
a4bbb810 BM |
599 | } |
600 | #endif | |
601 | return ((acpi_physical_address) (address64)); | |
602 | } | |
603 | } | |
604 | ||
793c2388 BM |
605 | /******************************************************************************* |
606 | * | |
f3d2e786 | 607 | * FUNCTION: acpi_tb_parse_root_table |
793c2388 | 608 | * |
ba494bee | 609 | * PARAMETERS: rsdp - Pointer to the RSDP |
f3d2e786 BM |
610 | * |
611 | * RETURN: Status | |
793c2388 | 612 | * |
f3d2e786 BM |
613 | * DESCRIPTION: This function is called to parse the Root System Description |
614 | * Table (RSDT or XSDT) | |
793c2388 | 615 | * |
f3d2e786 BM |
616 | * NOTE: Tables are mapped (not copied) for efficiency. The FACS must |
617 | * be mapped and cannot be copied because it contains the actual | |
618 | * memory location of the ACPI Global Lock. | |
793c2388 BM |
619 | * |
620 | ******************************************************************************/ | |
621 | ||
ad71860a | 622 | acpi_status __init |
97cbb7d1 | 623 | acpi_tb_parse_root_table(acpi_physical_address rsdp_address) |
793c2388 | 624 | { |
c5fc42ac | 625 | struct acpi_table_rsdp *rsdp; |
67a119f9 BM |
626 | u32 table_entry_size; |
627 | u32 i; | |
c5fc42ac | 628 | u32 table_count; |
f3d2e786 BM |
629 | struct acpi_table_header *table; |
630 | acpi_physical_address address; | |
8ab7367f | 631 | acpi_physical_address uninitialized_var(rsdt_address); |
f3d2e786 BM |
632 | u32 length; |
633 | u8 *table_entry; | |
f3d2e786 BM |
634 | acpi_status status; |
635 | ||
636 | ACPI_FUNCTION_TRACE(tb_parse_root_table); | |
637 | ||
c5fc42ac BM |
638 | /* |
639 | * Map the entire RSDP and extract the address of the RSDT or XSDT | |
640 | */ | |
641 | rsdp = acpi_os_map_memory(rsdp_address, sizeof(struct acpi_table_rsdp)); | |
642 | if (!rsdp) { | |
643 | return_ACPI_STATUS(AE_NO_MEMORY); | |
644 | } | |
645 | ||
646 | acpi_tb_print_table_header(rsdp_address, | |
647 | ACPI_CAST_PTR(struct acpi_table_header, | |
648 | rsdp)); | |
649 | ||
f3d2e786 BM |
650 | /* Differentiate between RSDT and XSDT root tables */ |
651 | ||
237889bf ZY |
652 | if (rsdp->revision > 1 && rsdp->xsdt_physical_address |
653 | && !acpi_rsdt_forced) { | |
f3d2e786 BM |
654 | /* |
655 | * Root table is an XSDT (64-bit physical addresses). We must use the | |
656 | * XSDT if the revision is > 1 and the XSDT pointer is present, as per | |
657 | * the ACPI specification. | |
658 | */ | |
c5fc42ac BM |
659 | address = (acpi_physical_address) rsdp->xsdt_physical_address; |
660 | table_entry_size = sizeof(u64); | |
9f3119b7 ZY |
661 | rsdt_address = (acpi_physical_address) |
662 | rsdp->rsdt_physical_address; | |
f3d2e786 BM |
663 | } else { |
664 | /* Root table is an RSDT (32-bit physical addresses) */ | |
665 | ||
c5fc42ac BM |
666 | address = (acpi_physical_address) rsdp->rsdt_physical_address; |
667 | table_entry_size = sizeof(u32); | |
f3d2e786 | 668 | } |
793c2388 | 669 | |
c5fc42ac BM |
670 | /* |
671 | * It is not possible to map more than one entry in some environments, | |
672 | * so unmap the RSDP here before mapping other tables | |
673 | */ | |
674 | acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp)); | |
675 | ||
9f3119b7 ZY |
676 | if (table_entry_size == sizeof(u64)) { |
677 | if (acpi_tb_check_xsdt(address) == AE_NULL_ENTRY) { | |
678 | /* XSDT has NULL entry, RSDT is used */ | |
679 | address = rsdt_address; | |
680 | table_entry_size = sizeof(u32); | |
4fdb2a05 | 681 | ACPI_WARNING((AE_INFO, "BIOS XSDT has NULL entry, " |
9f3119b7 ZY |
682 | "using RSDT")); |
683 | } | |
684 | } | |
c5fc42ac | 685 | /* Map the RSDT/XSDT table header to get the full table length */ |
793c2388 | 686 | |
f3d2e786 BM |
687 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); |
688 | if (!table) { | |
c5fc42ac | 689 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
690 | } |
691 | ||
c5fc42ac BM |
692 | acpi_tb_print_table_header(address, table); |
693 | ||
f3d2e786 BM |
694 | /* Get the length of the full table, verify length and map entire table */ |
695 | ||
696 | length = table->length; | |
697 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
698 | ||
699 | if (length < sizeof(struct acpi_table_header)) { | |
3b3ea775 BM |
700 | ACPI_BIOS_ERROR((AE_INFO, |
701 | "Invalid table length 0x%X in RSDT/XSDT", | |
702 | length)); | |
c5fc42ac | 703 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
f3d2e786 BM |
704 | } |
705 | ||
706 | table = acpi_os_map_memory(address, length); | |
707 | if (!table) { | |
c5fc42ac | 708 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
709 | } |
710 | ||
711 | /* Validate the root table checksum */ | |
712 | ||
c5fc42ac BM |
713 | status = acpi_tb_verify_checksum(table, length); |
714 | if (ACPI_FAILURE(status)) { | |
f3d2e786 | 715 | acpi_os_unmap_memory(table, length); |
c5fc42ac | 716 | return_ACPI_STATUS(status); |
f3d2e786 | 717 | } |
f3d2e786 BM |
718 | |
719 | /* Calculate the number of tables described in the root table */ | |
720 | ||
ec41f193 BM |
721 | table_count = (u32)((table->length - sizeof(struct acpi_table_header)) / |
722 | table_entry_size); | |
c5fc42ac | 723 | /* |
ec41f193 BM |
724 | * First two entries in the table array are reserved for the DSDT |
725 | * and FACS, which are not actually present in the RSDT/XSDT - they | |
726 | * come from the FADT | |
c5fc42ac | 727 | */ |
f3d2e786 BM |
728 | table_entry = |
729 | ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); | |
b9ee2043 | 730 | acpi_gbl_root_table_list.current_table_count = 2; |
1da177e4 | 731 | |
f3d2e786 | 732 | /* |
c5fc42ac | 733 | * Initialize the root table array from the RSDT/XSDT |
f3d2e786 | 734 | */ |
c5fc42ac | 735 | for (i = 0; i < table_count; i++) { |
b9ee2043 BM |
736 | if (acpi_gbl_root_table_list.current_table_count >= |
737 | acpi_gbl_root_table_list.max_table_count) { | |
c5fc42ac BM |
738 | |
739 | /* There is no more room in the root table array, attempt resize */ | |
740 | ||
f3d2e786 BM |
741 | status = acpi_tb_resize_root_table_list(); |
742 | if (ACPI_FAILURE(status)) { | |
743 | ACPI_WARNING((AE_INFO, | |
744 | "Truncating %u table entries!", | |
386e4a83 MS |
745 | (unsigned) (table_count - |
746 | (acpi_gbl_root_table_list. | |
b9ee2043 BM |
747 | current_table_count - |
748 | 2)))); | |
f3d2e786 BM |
749 | break; |
750 | } | |
751 | } | |
752 | ||
a4bbb810 BM |
753 | /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ |
754 | ||
b9ee2043 BM |
755 | acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list. |
756 | current_table_count].address = | |
a4bbb810 | 757 | acpi_tb_get_root_table_entry(table_entry, table_entry_size); |
f3d2e786 | 758 | |
c5fc42ac | 759 | table_entry += table_entry_size; |
b9ee2043 | 760 | acpi_gbl_root_table_list.current_table_count++; |
1da177e4 | 761 | } |
793c2388 | 762 | |
f3d2e786 BM |
763 | /* |
764 | * It is not possible to map more than one entry in some environments, | |
765 | * so unmap the root table here before mapping other tables | |
766 | */ | |
767 | acpi_os_unmap_memory(table, length); | |
768 | ||
c5fc42ac BM |
769 | /* |
770 | * Complete the initialization of the root table array by examining | |
771 | * the header of each table | |
772 | */ | |
b9ee2043 | 773 | for (i = 2; i < acpi_gbl_root_table_list.current_table_count; i++) { |
c5fc42ac | 774 | acpi_tb_install_table(acpi_gbl_root_table_list.tables[i]. |
97cbb7d1 | 775 | address, NULL, i); |
f3d2e786 | 776 | |
c5fc42ac | 777 | /* Special case for FADT - get the DSDT and FACS */ |
f3d2e786 | 778 | |
c5fc42ac BM |
779 | if (ACPI_COMPARE_NAME |
780 | (&acpi_gbl_root_table_list.tables[i].signature, | |
781 | ACPI_SIG_FADT)) { | |
97cbb7d1 | 782 | acpi_tb_parse_fadt(i); |
f3d2e786 BM |
783 | } |
784 | } | |
785 | ||
786 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 787 | } |