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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
f3d2e786 | 3 | * Module Name: tbutils - table utilities |
1da177e4 LT |
4 | * |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
a8357b0c | 8 | * Copyright (C) 2000 - 2010, 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 | |
009c4cbe BM |
121 | /******************************************************************************* |
122 | * | |
123 | * FUNCTION: acpi_tb_initialize_facs | |
124 | * | |
125 | * PARAMETERS: None | |
126 | * | |
127 | * RETURN: Status | |
128 | * | |
129 | * DESCRIPTION: Create a permanent mapping for the FADT and save it in a global | |
130 | * for accessing the Global Lock and Firmware Waking Vector | |
131 | * | |
132 | ******************************************************************************/ | |
133 | ||
134 | acpi_status acpi_tb_initialize_facs(void) | |
135 | { | |
136 | acpi_status status; | |
137 | ||
138 | status = acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS, | |
139 | ACPI_CAST_INDIRECT_PTR(struct | |
140 | acpi_table_header, | |
141 | &acpi_gbl_FACS)); | |
142 | return status; | |
143 | } | |
144 | ||
c857303a BM |
145 | /******************************************************************************* |
146 | * | |
147 | * FUNCTION: acpi_tb_tables_loaded | |
148 | * | |
149 | * PARAMETERS: None | |
150 | * | |
151 | * RETURN: TRUE if required ACPI tables are loaded | |
152 | * | |
153 | * DESCRIPTION: Determine if the minimum required ACPI tables are present | |
154 | * (FADT, FACS, DSDT) | |
155 | * | |
156 | ******************************************************************************/ | |
157 | ||
158 | u8 acpi_tb_tables_loaded(void) | |
159 | { | |
160 | ||
161 | if (acpi_gbl_root_table_list.count >= 3) { | |
162 | return (TRUE); | |
163 | } | |
164 | ||
165 | return (FALSE); | |
166 | } | |
167 | ||
cf02cd47 BM |
168 | /******************************************************************************* |
169 | * | |
170 | * FUNCTION: acpi_tb_fix_string | |
171 | * | |
172 | * PARAMETERS: String - String to be repaired | |
173 | * Length - Maximum length | |
174 | * | |
175 | * RETURN: None | |
176 | * | |
177 | * DESCRIPTION: Replace every non-printable or non-ascii byte in the string | |
178 | * with a question mark '?'. | |
179 | * | |
180 | ******************************************************************************/ | |
181 | ||
182 | static void acpi_tb_fix_string(char *string, acpi_size length) | |
183 | { | |
184 | ||
185 | while (length && *string) { | |
186 | if (!ACPI_IS_PRINT(*string)) { | |
187 | *string = '?'; | |
188 | } | |
189 | string++; | |
190 | length--; | |
191 | } | |
192 | } | |
193 | ||
194 | /******************************************************************************* | |
195 | * | |
196 | * FUNCTION: acpi_tb_cleanup_table_header | |
197 | * | |
198 | * PARAMETERS: out_header - Where the cleaned header is returned | |
199 | * Header - Input ACPI table header | |
200 | * | |
201 | * RETURN: Returns the cleaned header in out_header | |
202 | * | |
203 | * DESCRIPTION: Copy the table header and ensure that all "string" fields in | |
204 | * the header consist of printable characters. | |
205 | * | |
206 | ******************************************************************************/ | |
207 | ||
208 | static void | |
209 | acpi_tb_cleanup_table_header(struct acpi_table_header *out_header, | |
210 | struct acpi_table_header *header) | |
211 | { | |
212 | ||
213 | ACPI_MEMCPY(out_header, header, sizeof(struct acpi_table_header)); | |
214 | ||
215 | acpi_tb_fix_string(out_header->signature, ACPI_NAME_SIZE); | |
216 | acpi_tb_fix_string(out_header->oem_id, ACPI_OEM_ID_SIZE); | |
217 | acpi_tb_fix_string(out_header->oem_table_id, ACPI_OEM_TABLE_ID_SIZE); | |
218 | acpi_tb_fix_string(out_header->asl_compiler_id, ACPI_NAME_SIZE); | |
219 | } | |
220 | ||
0c9938cc RM |
221 | /******************************************************************************* |
222 | * | |
f3d2e786 | 223 | * FUNCTION: acpi_tb_print_table_header |
0c9938cc | 224 | * |
f3d2e786 BM |
225 | * PARAMETERS: Address - Table physical address |
226 | * Header - Table header | |
0c9938cc | 227 | * |
f3d2e786 | 228 | * RETURN: None |
0c9938cc | 229 | * |
c5fc42ac | 230 | * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP. |
0c9938cc RM |
231 | * |
232 | ******************************************************************************/ | |
233 | ||
f3d2e786 BM |
234 | void |
235 | acpi_tb_print_table_header(acpi_physical_address address, | |
236 | struct acpi_table_header *header) | |
0c9938cc | 237 | { |
cf02cd47 | 238 | struct acpi_table_header local_header; |
0c9938cc | 239 | |
b6bc342d BM |
240 | /* |
241 | * The reason that the Address is cast to a void pointer is so that we | |
242 | * can use %p which will work properly on both 32-bit and 64-bit hosts. | |
243 | */ | |
c5fc42ac BM |
244 | if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) { |
245 | ||
b6bc342d | 246 | /* FACS only has signature and length fields */ |
c5fc42ac | 247 | |
b6bc342d BM |
248 | ACPI_INFO((AE_INFO, "%4.4s %p %05X", |
249 | header->signature, ACPI_CAST_PTR(void, address), | |
c5fc42ac BM |
250 | header->length)); |
251 | } else if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_RSDP)) { | |
252 | ||
253 | /* RSDP has no common fields */ | |
254 | ||
cf02cd47 BM |
255 | ACPI_MEMCPY(local_header.oem_id, |
256 | ACPI_CAST_PTR(struct acpi_table_rsdp, | |
257 | header)->oem_id, ACPI_OEM_ID_SIZE); | |
258 | acpi_tb_fix_string(local_header.oem_id, ACPI_OEM_ID_SIZE); | |
259 | ||
b6bc342d BM |
260 | ACPI_INFO((AE_INFO, "RSDP %p %05X (v%.2d %6.6s)", |
261 | ACPI_CAST_PTR (void, address), | |
a4bbb810 BM |
262 | (ACPI_CAST_PTR(struct acpi_table_rsdp, header)-> |
263 | revision > | |
264 | 0) ? ACPI_CAST_PTR(struct acpi_table_rsdp, | |
265 | header)->length : 20, | |
266 | ACPI_CAST_PTR(struct acpi_table_rsdp, | |
267 | header)->revision, | |
cf02cd47 | 268 | local_header.oem_id)); |
c5fc42ac | 269 | } else { |
4bf27393 BM |
270 | /* Standard ACPI table with full common header */ |
271 | ||
cf02cd47 BM |
272 | acpi_tb_cleanup_table_header(&local_header, header); |
273 | ||
c5fc42ac | 274 | ACPI_INFO((AE_INFO, |
b6bc342d | 275 | "%4.4s %p %05X (v%.2d %6.6s %8.8s %08X %4.4s %08X)", |
cf02cd47 BM |
276 | local_header.signature, ACPI_CAST_PTR(void, address), |
277 | local_header.length, local_header.revision, | |
278 | local_header.oem_id, local_header.oem_table_id, | |
279 | local_header.oem_revision, | |
280 | local_header.asl_compiler_id, | |
281 | local_header.asl_compiler_revision)); | |
282 | ||
c5fc42ac | 283 | } |
0c9938cc RM |
284 | } |
285 | ||
c5fc42ac BM |
286 | /******************************************************************************* |
287 | * | |
288 | * FUNCTION: acpi_tb_validate_checksum | |
289 | * | |
290 | * PARAMETERS: Table - ACPI table to verify | |
291 | * Length - Length of entire table | |
292 | * | |
293 | * RETURN: Status | |
294 | * | |
295 | * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns | |
296 | * exception on bad checksum. | |
297 | * | |
298 | ******************************************************************************/ | |
299 | ||
300 | acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length) | |
301 | { | |
302 | u8 checksum; | |
303 | ||
304 | /* Compute the checksum on the table */ | |
305 | ||
306 | checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length); | |
307 | ||
308 | /* Checksum ok? (should be zero) */ | |
309 | ||
310 | if (checksum) { | |
311 | ACPI_WARNING((AE_INFO, | |
f6a22b0b | 312 | "Incorrect checksum in table [%4.4s] - 0x%2.2X, should be 0x%2.2X", |
c5fc42ac BM |
313 | table->signature, table->checksum, |
314 | (u8) (table->checksum - checksum))); | |
315 | ||
316 | #if (ACPI_CHECKSUM_ABORT) | |
317 | ||
318 | return (AE_BAD_CHECKSUM); | |
319 | #endif | |
320 | } | |
321 | ||
322 | return (AE_OK); | |
323 | } | |
324 | ||
1da177e4 LT |
325 | /******************************************************************************* |
326 | * | |
f3d2e786 | 327 | * FUNCTION: acpi_tb_checksum |
1da177e4 | 328 | * |
f3d2e786 BM |
329 | * PARAMETERS: Buffer - Pointer to memory region to be checked |
330 | * Length - Length of this memory region | |
1da177e4 | 331 | * |
f3d2e786 | 332 | * RETURN: Checksum (u8) |
1da177e4 | 333 | * |
f3d2e786 | 334 | * DESCRIPTION: Calculates circular checksum of memory region. |
1da177e4 LT |
335 | * |
336 | ******************************************************************************/ | |
337 | ||
67a119f9 | 338 | u8 acpi_tb_checksum(u8 *buffer, u32 length) |
793c2388 | 339 | { |
793c2388 | 340 | u8 sum = 0; |
f3d2e786 | 341 | u8 *end = buffer + length; |
793c2388 | 342 | |
f3d2e786 BM |
343 | while (buffer < end) { |
344 | sum = (u8) (sum + *(buffer++)); | |
793c2388 BM |
345 | } |
346 | ||
f3d2e786 | 347 | return sum; |
793c2388 BM |
348 | } |
349 | ||
729df0f8 LM |
350 | /******************************************************************************* |
351 | * | |
352 | * FUNCTION: acpi_tb_check_dsdt_header | |
353 | * | |
354 | * PARAMETERS: None | |
355 | * | |
356 | * RETURN: None | |
357 | * | |
358 | * DESCRIPTION: Quick compare to check validity of the DSDT. This will detect | |
359 | * if the DSDT has been replaced from outside the OS and/or if | |
360 | * the DSDT header has been corrupted. | |
361 | * | |
362 | ******************************************************************************/ | |
363 | ||
364 | void acpi_tb_check_dsdt_header(void) | |
365 | { | |
366 | ||
367 | /* Compare original length and checksum to current values */ | |
368 | ||
369 | if (acpi_gbl_original_dsdt_header.length != | |
370 | acpi_gbl_DSDT->pointer->length | |
371 | || acpi_gbl_original_dsdt_header.checksum != | |
372 | acpi_gbl_DSDT->pointer->checksum) { | |
373 | ACPI_ERROR((AE_INFO, | |
374 | "The DSDT has been corrupted or replaced - old, new headers below")); | |
375 | acpi_tb_print_table_header(0, &acpi_gbl_original_dsdt_header); | |
376 | acpi_tb_print_table_header(acpi_gbl_DSDT->address, | |
377 | acpi_gbl_DSDT->pointer); | |
378 | ||
379 | /* Disable further error messages */ | |
380 | ||
381 | acpi_gbl_original_dsdt_header.length = | |
382 | acpi_gbl_DSDT->pointer->length; | |
383 | acpi_gbl_original_dsdt_header.checksum = | |
384 | acpi_gbl_DSDT->pointer->checksum; | |
385 | } | |
386 | } | |
387 | ||
1da177e4 LT |
388 | /******************************************************************************* |
389 | * | |
c5fc42ac | 390 | * FUNCTION: acpi_tb_install_table |
1da177e4 | 391 | * |
c5fc42ac | 392 | * PARAMETERS: Address - Physical address of DSDT or FACS |
c5fc42ac BM |
393 | * Signature - Table signature, NULL if no need to |
394 | * match | |
395 | * table_index - Index into root table array | |
1da177e4 | 396 | * |
c5fc42ac | 397 | * RETURN: None |
1da177e4 | 398 | * |
ac5f98db BM |
399 | * DESCRIPTION: Install an ACPI table into the global data structure. The |
400 | * table override mechanism is implemented here to allow the host | |
401 | * OS to replace any table before it is installed in the root | |
402 | * table array. | |
1da177e4 LT |
403 | * |
404 | ******************************************************************************/ | |
405 | ||
765ec201 | 406 | void |
c5fc42ac | 407 | acpi_tb_install_table(acpi_physical_address address, |
97cbb7d1 | 408 | char *signature, u32 table_index) |
1da177e4 | 409 | { |
97cbb7d1 | 410 | u8 flags; |
ac5f98db BM |
411 | acpi_status status; |
412 | struct acpi_table_header *table_to_install; | |
413 | struct acpi_table_header *mapped_table; | |
414 | struct acpi_table_header *override_table = NULL; | |
f3d2e786 | 415 | |
c5fc42ac BM |
416 | if (!address) { |
417 | ACPI_ERROR((AE_INFO, | |
418 | "Null physical address for ACPI table [%s]", | |
419 | signature)); | |
420 | return; | |
f3d2e786 BM |
421 | } |
422 | ||
c5fc42ac BM |
423 | /* Map just the table header */ |
424 | ||
ac5f98db BM |
425 | mapped_table = |
426 | acpi_os_map_memory(address, sizeof(struct acpi_table_header)); | |
427 | if (!mapped_table) { | |
c5fc42ac BM |
428 | return; |
429 | } | |
430 | ||
ac5f98db | 431 | /* If a particular signature is expected (DSDT/FACS), it must match */ |
c5fc42ac | 432 | |
ac5f98db | 433 | if (signature && !ACPI_COMPARE_NAME(mapped_table->signature, signature)) { |
c5fc42ac | 434 | ACPI_ERROR((AE_INFO, |
ac5f98db BM |
435 | "Invalid signature 0x%X for ACPI table, expected [%s]", |
436 | *ACPI_CAST_PTR(u32, mapped_table->signature), | |
437 | signature)); | |
c5fc42ac | 438 | goto unmap_and_exit; |
f3d2e786 BM |
439 | } |
440 | ||
ac5f98db BM |
441 | /* |
442 | * ACPI Table Override: | |
443 | * | |
444 | * Before we install the table, let the host OS override it with a new | |
445 | * one if desired. Any table within the RSDT/XSDT can be replaced, | |
446 | * including the DSDT which is pointed to by the FADT. | |
447 | */ | |
448 | status = acpi_os_table_override(mapped_table, &override_table); | |
449 | if (ACPI_SUCCESS(status) && override_table) { | |
450 | ACPI_INFO((AE_INFO, | |
451 | "%4.4s @ 0x%p Table override, replaced with:", | |
452 | mapped_table->signature, ACPI_CAST_PTR(void, | |
453 | address))); | |
454 | ||
455 | acpi_gbl_root_table_list.tables[table_index].pointer = | |
456 | override_table; | |
ac5f98db BM |
457 | address = ACPI_PTR_TO_PHYSADDR(override_table); |
458 | ||
459 | table_to_install = override_table; | |
97cbb7d1 | 460 | flags = ACPI_TABLE_ORIGIN_OVERRIDE; |
ac5f98db BM |
461 | } else { |
462 | table_to_install = mapped_table; | |
97cbb7d1 | 463 | flags = ACPI_TABLE_ORIGIN_MAPPED; |
ac5f98db BM |
464 | } |
465 | ||
c5fc42ac BM |
466 | /* Initialize the table entry */ |
467 | ||
468 | acpi_gbl_root_table_list.tables[table_index].address = address; | |
ac5f98db BM |
469 | acpi_gbl_root_table_list.tables[table_index].length = |
470 | table_to_install->length; | |
c5fc42ac | 471 | acpi_gbl_root_table_list.tables[table_index].flags = flags; |
f3d2e786 BM |
472 | |
473 | ACPI_MOVE_32_TO_32(& | |
c5fc42ac | 474 | (acpi_gbl_root_table_list.tables[table_index]. |
ac5f98db | 475 | signature), table_to_install->signature); |
f3d2e786 | 476 | |
ac5f98db | 477 | acpi_tb_print_table_header(address, table_to_install); |
f3d2e786 | 478 | |
c5fc42ac | 479 | if (table_index == ACPI_TABLE_INDEX_DSDT) { |
f3d2e786 | 480 | |
c5fc42ac | 481 | /* Global integer width is based upon revision of the DSDT */ |
f3d2e786 | 482 | |
ac5f98db | 483 | acpi_ut_set_integer_width(table_to_install->revision); |
c5fc42ac BM |
484 | } |
485 | ||
486 | unmap_and_exit: | |
ac5f98db | 487 | acpi_os_unmap_memory(mapped_table, sizeof(struct acpi_table_header)); |
c5fc42ac | 488 | } |
f3d2e786 | 489 | |
a4bbb810 BM |
490 | /******************************************************************************* |
491 | * | |
492 | * FUNCTION: acpi_tb_get_root_table_entry | |
493 | * | |
494 | * PARAMETERS: table_entry - Pointer to the RSDT/XSDT table entry | |
495 | * table_entry_size - sizeof 32 or 64 (RSDT or XSDT) | |
496 | * | |
497 | * RETURN: Physical address extracted from the root table | |
498 | * | |
499 | * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on | |
500 | * both 32-bit and 64-bit platforms | |
501 | * | |
502 | * NOTE: acpi_physical_address is 32-bit on 32-bit platforms, 64-bit on | |
503 | * 64-bit platforms. | |
504 | * | |
505 | ******************************************************************************/ | |
506 | ||
507 | static acpi_physical_address | |
67a119f9 | 508 | acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size) |
a4bbb810 BM |
509 | { |
510 | u64 address64; | |
511 | ||
512 | /* | |
513 | * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): | |
514 | * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT | |
515 | */ | |
516 | if (table_entry_size == sizeof(u32)) { | |
517 | /* | |
518 | * 32-bit platform, RSDT: Return 32-bit table entry | |
519 | * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return | |
520 | */ | |
521 | return ((acpi_physical_address) | |
522 | (*ACPI_CAST_PTR(u32, table_entry))); | |
523 | } else { | |
524 | /* | |
525 | * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return | |
ec41f193 BM |
526 | * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, |
527 | * return 64-bit | |
a4bbb810 BM |
528 | */ |
529 | ACPI_MOVE_64_TO_64(&address64, table_entry); | |
530 | ||
531 | #if ACPI_MACHINE_WIDTH == 32 | |
532 | if (address64 > ACPI_UINT32_MAX) { | |
533 | ||
ea5d8ebc | 534 | /* Will truncate 64-bit address to 32 bits, issue warning */ |
a4bbb810 BM |
535 | |
536 | ACPI_WARNING((AE_INFO, | |
f6a22b0b | 537 | "64-bit Physical Address in XSDT is too large (0x%8.8X%8.8X)," |
ec41f193 | 538 | " truncating", |
a4bbb810 BM |
539 | ACPI_FORMAT_UINT64(address64))); |
540 | } | |
541 | #endif | |
542 | return ((acpi_physical_address) (address64)); | |
543 | } | |
544 | } | |
545 | ||
793c2388 BM |
546 | /******************************************************************************* |
547 | * | |
f3d2e786 | 548 | * FUNCTION: acpi_tb_parse_root_table |
793c2388 | 549 | * |
f3d2e786 | 550 | * PARAMETERS: Rsdp - Pointer to the RSDP |
f3d2e786 BM |
551 | * |
552 | * RETURN: Status | |
793c2388 | 553 | * |
f3d2e786 BM |
554 | * DESCRIPTION: This function is called to parse the Root System Description |
555 | * Table (RSDT or XSDT) | |
793c2388 | 556 | * |
f3d2e786 BM |
557 | * NOTE: Tables are mapped (not copied) for efficiency. The FACS must |
558 | * be mapped and cannot be copied because it contains the actual | |
559 | * memory location of the ACPI Global Lock. | |
793c2388 BM |
560 | * |
561 | ******************************************************************************/ | |
562 | ||
ad71860a | 563 | acpi_status __init |
97cbb7d1 | 564 | acpi_tb_parse_root_table(acpi_physical_address rsdp_address) |
793c2388 | 565 | { |
c5fc42ac | 566 | struct acpi_table_rsdp *rsdp; |
67a119f9 BM |
567 | u32 table_entry_size; |
568 | u32 i; | |
c5fc42ac | 569 | u32 table_count; |
f3d2e786 BM |
570 | struct acpi_table_header *table; |
571 | acpi_physical_address address; | |
8ab7367f | 572 | acpi_physical_address uninitialized_var(rsdt_address); |
f3d2e786 BM |
573 | u32 length; |
574 | u8 *table_entry; | |
f3d2e786 BM |
575 | acpi_status status; |
576 | ||
577 | ACPI_FUNCTION_TRACE(tb_parse_root_table); | |
578 | ||
c5fc42ac BM |
579 | /* |
580 | * Map the entire RSDP and extract the address of the RSDT or XSDT | |
581 | */ | |
582 | rsdp = acpi_os_map_memory(rsdp_address, sizeof(struct acpi_table_rsdp)); | |
583 | if (!rsdp) { | |
584 | return_ACPI_STATUS(AE_NO_MEMORY); | |
585 | } | |
586 | ||
587 | acpi_tb_print_table_header(rsdp_address, | |
588 | ACPI_CAST_PTR(struct acpi_table_header, | |
589 | rsdp)); | |
590 | ||
f3d2e786 BM |
591 | /* Differentiate between RSDT and XSDT root tables */ |
592 | ||
237889bf ZY |
593 | if (rsdp->revision > 1 && rsdp->xsdt_physical_address |
594 | && !acpi_rsdt_forced) { | |
f3d2e786 BM |
595 | /* |
596 | * Root table is an XSDT (64-bit physical addresses). We must use the | |
597 | * XSDT if the revision is > 1 and the XSDT pointer is present, as per | |
598 | * the ACPI specification. | |
599 | */ | |
c5fc42ac BM |
600 | address = (acpi_physical_address) rsdp->xsdt_physical_address; |
601 | table_entry_size = sizeof(u64); | |
9f3119b7 ZY |
602 | rsdt_address = (acpi_physical_address) |
603 | rsdp->rsdt_physical_address; | |
f3d2e786 BM |
604 | } else { |
605 | /* Root table is an RSDT (32-bit physical addresses) */ | |
606 | ||
c5fc42ac BM |
607 | address = (acpi_physical_address) rsdp->rsdt_physical_address; |
608 | table_entry_size = sizeof(u32); | |
f3d2e786 | 609 | } |
793c2388 | 610 | |
c5fc42ac BM |
611 | /* |
612 | * It is not possible to map more than one entry in some environments, | |
613 | * so unmap the RSDP here before mapping other tables | |
614 | */ | |
615 | acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp)); | |
616 | ||
9f3119b7 ZY |
617 | if (table_entry_size == sizeof(u64)) { |
618 | if (acpi_tb_check_xsdt(address) == AE_NULL_ENTRY) { | |
619 | /* XSDT has NULL entry, RSDT is used */ | |
620 | address = rsdt_address; | |
621 | table_entry_size = sizeof(u32); | |
4fdb2a05 | 622 | ACPI_WARNING((AE_INFO, "BIOS XSDT has NULL entry, " |
9f3119b7 ZY |
623 | "using RSDT")); |
624 | } | |
625 | } | |
c5fc42ac | 626 | /* Map the RSDT/XSDT table header to get the full table length */ |
793c2388 | 627 | |
f3d2e786 BM |
628 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); |
629 | if (!table) { | |
c5fc42ac | 630 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
631 | } |
632 | ||
c5fc42ac BM |
633 | acpi_tb_print_table_header(address, table); |
634 | ||
f3d2e786 BM |
635 | /* Get the length of the full table, verify length and map entire table */ |
636 | ||
637 | length = table->length; | |
638 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
639 | ||
640 | if (length < sizeof(struct acpi_table_header)) { | |
641 | ACPI_ERROR((AE_INFO, "Invalid length 0x%X in RSDT/XSDT", | |
642 | length)); | |
c5fc42ac | 643 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
f3d2e786 BM |
644 | } |
645 | ||
646 | table = acpi_os_map_memory(address, length); | |
647 | if (!table) { | |
c5fc42ac | 648 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
649 | } |
650 | ||
651 | /* Validate the root table checksum */ | |
652 | ||
c5fc42ac BM |
653 | status = acpi_tb_verify_checksum(table, length); |
654 | if (ACPI_FAILURE(status)) { | |
f3d2e786 | 655 | acpi_os_unmap_memory(table, length); |
c5fc42ac | 656 | return_ACPI_STATUS(status); |
f3d2e786 | 657 | } |
f3d2e786 BM |
658 | |
659 | /* Calculate the number of tables described in the root table */ | |
660 | ||
ec41f193 BM |
661 | table_count = (u32)((table->length - sizeof(struct acpi_table_header)) / |
662 | table_entry_size); | |
c5fc42ac | 663 | /* |
ec41f193 BM |
664 | * First two entries in the table array are reserved for the DSDT |
665 | * and FACS, which are not actually present in the RSDT/XSDT - they | |
666 | * come from the FADT | |
c5fc42ac | 667 | */ |
f3d2e786 BM |
668 | table_entry = |
669 | ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); | |
670 | acpi_gbl_root_table_list.count = 2; | |
1da177e4 | 671 | |
f3d2e786 | 672 | /* |
c5fc42ac | 673 | * Initialize the root table array from the RSDT/XSDT |
f3d2e786 | 674 | */ |
c5fc42ac | 675 | for (i = 0; i < table_count; i++) { |
f3d2e786 BM |
676 | if (acpi_gbl_root_table_list.count >= |
677 | acpi_gbl_root_table_list.size) { | |
c5fc42ac BM |
678 | |
679 | /* There is no more room in the root table array, attempt resize */ | |
680 | ||
f3d2e786 BM |
681 | status = acpi_tb_resize_root_table_list(); |
682 | if (ACPI_FAILURE(status)) { | |
683 | ACPI_WARNING((AE_INFO, | |
684 | "Truncating %u table entries!", | |
386e4a83 MS |
685 | (unsigned) (table_count - |
686 | (acpi_gbl_root_table_list. | |
687 | count - 2)))); | |
f3d2e786 BM |
688 | break; |
689 | } | |
690 | } | |
691 | ||
a4bbb810 BM |
692 | /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ |
693 | ||
694 | acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count]. | |
695 | address = | |
696 | acpi_tb_get_root_table_entry(table_entry, table_entry_size); | |
f3d2e786 | 697 | |
c5fc42ac | 698 | table_entry += table_entry_size; |
f3d2e786 | 699 | acpi_gbl_root_table_list.count++; |
1da177e4 | 700 | } |
793c2388 | 701 | |
f3d2e786 BM |
702 | /* |
703 | * It is not possible to map more than one entry in some environments, | |
704 | * so unmap the root table here before mapping other tables | |
705 | */ | |
706 | acpi_os_unmap_memory(table, length); | |
707 | ||
c5fc42ac BM |
708 | /* |
709 | * Complete the initialization of the root table array by examining | |
710 | * the header of each table | |
711 | */ | |
f3d2e786 | 712 | for (i = 2; i < acpi_gbl_root_table_list.count; i++) { |
c5fc42ac | 713 | acpi_tb_install_table(acpi_gbl_root_table_list.tables[i]. |
97cbb7d1 | 714 | address, NULL, i); |
f3d2e786 | 715 | |
c5fc42ac | 716 | /* Special case for FADT - get the DSDT and FACS */ |
f3d2e786 | 717 | |
c5fc42ac BM |
718 | if (ACPI_COMPARE_NAME |
719 | (&acpi_gbl_root_table_list.tables[i].signature, | |
720 | ACPI_SIG_FADT)) { | |
97cbb7d1 | 721 | acpi_tb_parse_fadt(i); |
f3d2e786 BM |
722 | } |
723 | } | |
724 | ||
725 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 726 | } |