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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
f3d2e786 | 3 | * Module Name: tbutils - table utilities |
1da177e4 LT |
4 | * |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, 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 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/actables.h> | |
46 | ||
1da177e4 | 47 | #define _COMPONENT ACPI_TABLES |
4be44fcd | 48 | ACPI_MODULE_NAME("tbutils") |
1da177e4 | 49 | |
44f6c012 | 50 | /* Local prototypes */ |
a4bbb810 BM |
51 | static acpi_physical_address |
52 | acpi_tb_get_root_table_entry(u8 * table_entry, | |
53 | acpi_native_uint table_entry_size); | |
9f3119b7 ZY |
54 | /******************************************************************************* |
55 | * | |
56 | * FUNCTION: acpi_tb_check_xsdt | |
57 | * | |
58 | * PARAMETERS: address - Pointer to the XSDT | |
59 | * | |
60 | * RETURN: status | |
61 | * AE_OK - XSDT is okay | |
62 | * AE_NO_MEMORY - can't map XSDT | |
63 | * AE_INVALID_TABLE_LENGTH - invalid table length | |
64 | * AE_NULL_ENTRY - XSDT has NULL entry | |
65 | * | |
66 | * DESCRIPTION: validate XSDT | |
67 | ******************************************************************************/ | |
68 | ||
69 | static acpi_status | |
70 | acpi_tb_check_xsdt(acpi_physical_address address) | |
71 | { | |
72 | struct acpi_table_header *table; | |
73 | u32 length; | |
74 | u64 xsdt_entry_address; | |
75 | u8 *table_entry; | |
76 | u32 table_count; | |
77 | int i; | |
78 | ||
79 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); | |
80 | if (!table) | |
81 | return AE_NO_MEMORY; | |
82 | ||
83 | length = table->length; | |
84 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
85 | if (length < sizeof(struct acpi_table_header)) | |
86 | return AE_INVALID_TABLE_LENGTH; | |
87 | ||
88 | table = acpi_os_map_memory(address, length); | |
89 | if (!table) | |
90 | return AE_NO_MEMORY; | |
91 | ||
92 | /* Calculate the number of tables described in XSDT */ | |
93 | table_count = | |
94 | (u32) ((table->length - | |
95 | sizeof(struct acpi_table_header)) / sizeof(u64)); | |
96 | table_entry = | |
97 | ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); | |
98 | for (i = 0; i < table_count; i++) { | |
99 | ACPI_MOVE_64_TO_64(&xsdt_entry_address, table_entry); | |
100 | if (!xsdt_entry_address) { | |
101 | /* XSDT has NULL entry */ | |
102 | break; | |
103 | } | |
104 | table_entry += sizeof(u64); | |
105 | } | |
106 | acpi_os_unmap_memory(table, length); | |
107 | ||
108 | if (i < table_count) | |
109 | return AE_NULL_ENTRY; | |
110 | else | |
111 | return AE_OK; | |
112 | } | |
a4bbb810 | 113 | |
c857303a BM |
114 | /******************************************************************************* |
115 | * | |
116 | * FUNCTION: acpi_tb_tables_loaded | |
117 | * | |
118 | * PARAMETERS: None | |
119 | * | |
120 | * RETURN: TRUE if required ACPI tables are loaded | |
121 | * | |
122 | * DESCRIPTION: Determine if the minimum required ACPI tables are present | |
123 | * (FADT, FACS, DSDT) | |
124 | * | |
125 | ******************************************************************************/ | |
126 | ||
127 | u8 acpi_tb_tables_loaded(void) | |
128 | { | |
129 | ||
130 | if (acpi_gbl_root_table_list.count >= 3) { | |
131 | return (TRUE); | |
132 | } | |
133 | ||
134 | return (FALSE); | |
135 | } | |
136 | ||
0c9938cc RM |
137 | /******************************************************************************* |
138 | * | |
f3d2e786 | 139 | * FUNCTION: acpi_tb_print_table_header |
0c9938cc | 140 | * |
f3d2e786 BM |
141 | * PARAMETERS: Address - Table physical address |
142 | * Header - Table header | |
0c9938cc | 143 | * |
f3d2e786 | 144 | * RETURN: None |
0c9938cc | 145 | * |
c5fc42ac | 146 | * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP. |
0c9938cc RM |
147 | * |
148 | ******************************************************************************/ | |
149 | ||
f3d2e786 BM |
150 | void |
151 | acpi_tb_print_table_header(acpi_physical_address address, | |
152 | struct acpi_table_header *header) | |
0c9938cc | 153 | { |
0c9938cc | 154 | |
c5fc42ac BM |
155 | if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) { |
156 | ||
157 | /* FACS only has signature and length fields of common table header */ | |
158 | ||
03c6d130 LB |
159 | ACPI_INFO((AE_INFO, "%4.4s %08lX, %04X", |
160 | header->signature, (unsigned long)address, | |
c5fc42ac BM |
161 | header->length)); |
162 | } else if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_RSDP)) { | |
163 | ||
164 | /* RSDP has no common fields */ | |
165 | ||
03c6d130 LB |
166 | ACPI_INFO((AE_INFO, "RSDP %08lX, %04X (r%d %6.6s)", |
167 | (unsigned long)address, | |
a4bbb810 BM |
168 | (ACPI_CAST_PTR(struct acpi_table_rsdp, header)-> |
169 | revision > | |
170 | 0) ? ACPI_CAST_PTR(struct acpi_table_rsdp, | |
171 | header)->length : 20, | |
172 | ACPI_CAST_PTR(struct acpi_table_rsdp, | |
173 | header)->revision, | |
174 | ACPI_CAST_PTR(struct acpi_table_rsdp, | |
175 | header)->oem_id)); | |
c5fc42ac | 176 | } else { |
4bf27393 BM |
177 | /* Standard ACPI table with full common header */ |
178 | ||
c5fc42ac | 179 | ACPI_INFO((AE_INFO, |
03c6d130 LB |
180 | "%4.4s %08lX, %04X (r%d %6.6s %8.8s %8X %4.4s %8X)", |
181 | header->signature, (unsigned long)address, | |
c5fc42ac BM |
182 | header->length, header->revision, header->oem_id, |
183 | header->oem_table_id, header->oem_revision, | |
184 | header->asl_compiler_id, | |
185 | header->asl_compiler_revision)); | |
186 | } | |
0c9938cc RM |
187 | } |
188 | ||
c5fc42ac BM |
189 | /******************************************************************************* |
190 | * | |
191 | * FUNCTION: acpi_tb_validate_checksum | |
192 | * | |
193 | * PARAMETERS: Table - ACPI table to verify | |
194 | * Length - Length of entire table | |
195 | * | |
196 | * RETURN: Status | |
197 | * | |
198 | * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns | |
199 | * exception on bad checksum. | |
200 | * | |
201 | ******************************************************************************/ | |
202 | ||
203 | acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length) | |
204 | { | |
205 | u8 checksum; | |
206 | ||
207 | /* Compute the checksum on the table */ | |
208 | ||
209 | checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length); | |
210 | ||
211 | /* Checksum ok? (should be zero) */ | |
212 | ||
213 | if (checksum) { | |
214 | ACPI_WARNING((AE_INFO, | |
98af37fb | 215 | "Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X", |
c5fc42ac BM |
216 | table->signature, table->checksum, |
217 | (u8) (table->checksum - checksum))); | |
218 | ||
219 | #if (ACPI_CHECKSUM_ABORT) | |
220 | ||
221 | return (AE_BAD_CHECKSUM); | |
222 | #endif | |
223 | } | |
224 | ||
225 | return (AE_OK); | |
226 | } | |
227 | ||
1da177e4 LT |
228 | /******************************************************************************* |
229 | * | |
f3d2e786 | 230 | * FUNCTION: acpi_tb_checksum |
1da177e4 | 231 | * |
f3d2e786 BM |
232 | * PARAMETERS: Buffer - Pointer to memory region to be checked |
233 | * Length - Length of this memory region | |
1da177e4 | 234 | * |
f3d2e786 | 235 | * RETURN: Checksum (u8) |
1da177e4 | 236 | * |
f3d2e786 | 237 | * DESCRIPTION: Calculates circular checksum of memory region. |
1da177e4 LT |
238 | * |
239 | ******************************************************************************/ | |
240 | ||
f3d2e786 | 241 | u8 acpi_tb_checksum(u8 * buffer, acpi_native_uint length) |
793c2388 | 242 | { |
793c2388 | 243 | u8 sum = 0; |
f3d2e786 | 244 | u8 *end = buffer + length; |
793c2388 | 245 | |
f3d2e786 BM |
246 | while (buffer < end) { |
247 | sum = (u8) (sum + *(buffer++)); | |
793c2388 BM |
248 | } |
249 | ||
f3d2e786 | 250 | return sum; |
793c2388 BM |
251 | } |
252 | ||
1da177e4 LT |
253 | /******************************************************************************* |
254 | * | |
c5fc42ac | 255 | * FUNCTION: acpi_tb_install_table |
1da177e4 | 256 | * |
c5fc42ac BM |
257 | * PARAMETERS: Address - Physical address of DSDT or FACS |
258 | * Flags - Flags | |
259 | * Signature - Table signature, NULL if no need to | |
260 | * match | |
261 | * table_index - Index into root table array | |
1da177e4 | 262 | * |
c5fc42ac | 263 | * RETURN: None |
1da177e4 | 264 | * |
c5fc42ac | 265 | * DESCRIPTION: Install an ACPI table into the global data structure. |
1da177e4 LT |
266 | * |
267 | ******************************************************************************/ | |
268 | ||
765ec201 | 269 | void |
c5fc42ac BM |
270 | acpi_tb_install_table(acpi_physical_address address, |
271 | u8 flags, char *signature, acpi_native_uint table_index) | |
1da177e4 | 272 | { |
f3d2e786 BM |
273 | struct acpi_table_header *table; |
274 | ||
c5fc42ac BM |
275 | if (!address) { |
276 | ACPI_ERROR((AE_INFO, | |
277 | "Null physical address for ACPI table [%s]", | |
278 | signature)); | |
279 | return; | |
f3d2e786 BM |
280 | } |
281 | ||
c5fc42ac BM |
282 | /* Map just the table header */ |
283 | ||
284 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); | |
f3d2e786 | 285 | if (!table) { |
c5fc42ac BM |
286 | return; |
287 | } | |
288 | ||
289 | /* If a particular signature is expected, signature must match */ | |
290 | ||
291 | if (signature && !ACPI_COMPARE_NAME(table->signature, signature)) { | |
292 | ACPI_ERROR((AE_INFO, | |
293 | "Invalid signature 0x%X for ACPI table [%s]", | |
294 | *ACPI_CAST_PTR(u32, table->signature), signature)); | |
295 | goto unmap_and_exit; | |
f3d2e786 BM |
296 | } |
297 | ||
c5fc42ac BM |
298 | /* Initialize the table entry */ |
299 | ||
300 | acpi_gbl_root_table_list.tables[table_index].address = address; | |
301 | acpi_gbl_root_table_list.tables[table_index].length = table->length; | |
302 | acpi_gbl_root_table_list.tables[table_index].flags = flags; | |
f3d2e786 BM |
303 | |
304 | ACPI_MOVE_32_TO_32(& | |
c5fc42ac BM |
305 | (acpi_gbl_root_table_list.tables[table_index]. |
306 | signature), table->signature); | |
f3d2e786 | 307 | |
c5fc42ac | 308 | acpi_tb_print_table_header(address, table); |
f3d2e786 | 309 | |
c5fc42ac | 310 | if (table_index == ACPI_TABLE_INDEX_DSDT) { |
f3d2e786 | 311 | |
c5fc42ac | 312 | /* Global integer width is based upon revision of the DSDT */ |
f3d2e786 | 313 | |
c5fc42ac BM |
314 | acpi_ut_set_integer_width(table->revision); |
315 | } | |
316 | ||
317 | unmap_and_exit: | |
f3d2e786 | 318 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); |
c5fc42ac | 319 | } |
f3d2e786 | 320 | |
a4bbb810 BM |
321 | /******************************************************************************* |
322 | * | |
323 | * FUNCTION: acpi_tb_get_root_table_entry | |
324 | * | |
325 | * PARAMETERS: table_entry - Pointer to the RSDT/XSDT table entry | |
326 | * table_entry_size - sizeof 32 or 64 (RSDT or XSDT) | |
327 | * | |
328 | * RETURN: Physical address extracted from the root table | |
329 | * | |
330 | * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on | |
331 | * both 32-bit and 64-bit platforms | |
332 | * | |
333 | * NOTE: acpi_physical_address is 32-bit on 32-bit platforms, 64-bit on | |
334 | * 64-bit platforms. | |
335 | * | |
336 | ******************************************************************************/ | |
337 | ||
338 | static acpi_physical_address | |
339 | acpi_tb_get_root_table_entry(u8 * table_entry, | |
340 | acpi_native_uint table_entry_size) | |
341 | { | |
342 | u64 address64; | |
343 | ||
344 | /* | |
345 | * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): | |
346 | * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT | |
347 | */ | |
348 | if (table_entry_size == sizeof(u32)) { | |
349 | /* | |
350 | * 32-bit platform, RSDT: Return 32-bit table entry | |
351 | * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return | |
352 | */ | |
353 | return ((acpi_physical_address) | |
354 | (*ACPI_CAST_PTR(u32, table_entry))); | |
355 | } else { | |
356 | /* | |
357 | * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return | |
358 | * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, return 64-bit | |
359 | */ | |
360 | ACPI_MOVE_64_TO_64(&address64, table_entry); | |
361 | ||
362 | #if ACPI_MACHINE_WIDTH == 32 | |
363 | if (address64 > ACPI_UINT32_MAX) { | |
364 | ||
ea5d8ebc | 365 | /* Will truncate 64-bit address to 32 bits, issue warning */ |
a4bbb810 BM |
366 | |
367 | ACPI_WARNING((AE_INFO, | |
368 | "64-bit Physical Address in XSDT is too large (%8.8X%8.8X), truncating", | |
369 | ACPI_FORMAT_UINT64(address64))); | |
370 | } | |
371 | #endif | |
372 | return ((acpi_physical_address) (address64)); | |
373 | } | |
374 | } | |
375 | ||
793c2388 BM |
376 | /******************************************************************************* |
377 | * | |
f3d2e786 | 378 | * FUNCTION: acpi_tb_parse_root_table |
793c2388 | 379 | * |
f3d2e786 BM |
380 | * PARAMETERS: Rsdp - Pointer to the RSDP |
381 | * Flags - Flags | |
382 | * | |
383 | * RETURN: Status | |
793c2388 | 384 | * |
f3d2e786 BM |
385 | * DESCRIPTION: This function is called to parse the Root System Description |
386 | * Table (RSDT or XSDT) | |
793c2388 | 387 | * |
f3d2e786 BM |
388 | * NOTE: Tables are mapped (not copied) for efficiency. The FACS must |
389 | * be mapped and cannot be copied because it contains the actual | |
390 | * memory location of the ACPI Global Lock. | |
793c2388 BM |
391 | * |
392 | ******************************************************************************/ | |
393 | ||
ad71860a | 394 | acpi_status __init |
c5fc42ac | 395 | acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags) |
793c2388 | 396 | { |
c5fc42ac BM |
397 | struct acpi_table_rsdp *rsdp; |
398 | acpi_native_uint table_entry_size; | |
399 | acpi_native_uint i; | |
400 | u32 table_count; | |
f3d2e786 BM |
401 | struct acpi_table_header *table; |
402 | acpi_physical_address address; | |
8ab7367f | 403 | acpi_physical_address uninitialized_var(rsdt_address); |
f3d2e786 BM |
404 | u32 length; |
405 | u8 *table_entry; | |
f3d2e786 BM |
406 | acpi_status status; |
407 | ||
408 | ACPI_FUNCTION_TRACE(tb_parse_root_table); | |
409 | ||
c5fc42ac BM |
410 | /* |
411 | * Map the entire RSDP and extract the address of the RSDT or XSDT | |
412 | */ | |
413 | rsdp = acpi_os_map_memory(rsdp_address, sizeof(struct acpi_table_rsdp)); | |
414 | if (!rsdp) { | |
415 | return_ACPI_STATUS(AE_NO_MEMORY); | |
416 | } | |
417 | ||
418 | acpi_tb_print_table_header(rsdp_address, | |
419 | ACPI_CAST_PTR(struct acpi_table_header, | |
420 | rsdp)); | |
421 | ||
f3d2e786 BM |
422 | /* Differentiate between RSDT and XSDT root tables */ |
423 | ||
424 | if (rsdp->revision > 1 && rsdp->xsdt_physical_address) { | |
425 | /* | |
426 | * Root table is an XSDT (64-bit physical addresses). We must use the | |
427 | * XSDT if the revision is > 1 and the XSDT pointer is present, as per | |
428 | * the ACPI specification. | |
429 | */ | |
c5fc42ac BM |
430 | address = (acpi_physical_address) rsdp->xsdt_physical_address; |
431 | table_entry_size = sizeof(u64); | |
9f3119b7 ZY |
432 | rsdt_address = (acpi_physical_address) |
433 | rsdp->rsdt_physical_address; | |
f3d2e786 BM |
434 | } else { |
435 | /* Root table is an RSDT (32-bit physical addresses) */ | |
436 | ||
c5fc42ac BM |
437 | address = (acpi_physical_address) rsdp->rsdt_physical_address; |
438 | table_entry_size = sizeof(u32); | |
f3d2e786 | 439 | } |
793c2388 | 440 | |
c5fc42ac BM |
441 | /* |
442 | * It is not possible to map more than one entry in some environments, | |
443 | * so unmap the RSDP here before mapping other tables | |
444 | */ | |
445 | acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp)); | |
446 | ||
9f3119b7 ZY |
447 | if (table_entry_size == sizeof(u64)) { |
448 | if (acpi_tb_check_xsdt(address) == AE_NULL_ENTRY) { | |
449 | /* XSDT has NULL entry, RSDT is used */ | |
450 | address = rsdt_address; | |
451 | table_entry_size = sizeof(u32); | |
4fdb2a05 | 452 | ACPI_WARNING((AE_INFO, "BIOS XSDT has NULL entry, " |
9f3119b7 ZY |
453 | "using RSDT")); |
454 | } | |
455 | } | |
c5fc42ac | 456 | /* Map the RSDT/XSDT table header to get the full table length */ |
793c2388 | 457 | |
f3d2e786 BM |
458 | table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); |
459 | if (!table) { | |
c5fc42ac | 460 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
461 | } |
462 | ||
c5fc42ac BM |
463 | acpi_tb_print_table_header(address, table); |
464 | ||
f3d2e786 BM |
465 | /* Get the length of the full table, verify length and map entire table */ |
466 | ||
467 | length = table->length; | |
468 | acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); | |
469 | ||
470 | if (length < sizeof(struct acpi_table_header)) { | |
471 | ACPI_ERROR((AE_INFO, "Invalid length 0x%X in RSDT/XSDT", | |
472 | length)); | |
c5fc42ac | 473 | return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); |
f3d2e786 BM |
474 | } |
475 | ||
476 | table = acpi_os_map_memory(address, length); | |
477 | if (!table) { | |
c5fc42ac | 478 | return_ACPI_STATUS(AE_NO_MEMORY); |
f3d2e786 BM |
479 | } |
480 | ||
481 | /* Validate the root table checksum */ | |
482 | ||
c5fc42ac BM |
483 | status = acpi_tb_verify_checksum(table, length); |
484 | if (ACPI_FAILURE(status)) { | |
f3d2e786 | 485 | acpi_os_unmap_memory(table, length); |
c5fc42ac | 486 | return_ACPI_STATUS(status); |
f3d2e786 | 487 | } |
f3d2e786 BM |
488 | |
489 | /* Calculate the number of tables described in the root table */ | |
490 | ||
491 | table_count = | |
a4bbb810 BM |
492 | (u32) ((table->length - |
493 | sizeof(struct acpi_table_header)) / table_entry_size); | |
52fc0b02 | 494 | |
c5fc42ac BM |
495 | /* |
496 | * First two entries in the table array are reserved for the DSDT and FACS, | |
497 | * which are not actually present in the RSDT/XSDT - they come from the FADT | |
498 | */ | |
f3d2e786 BM |
499 | table_entry = |
500 | ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); | |
501 | acpi_gbl_root_table_list.count = 2; | |
1da177e4 | 502 | |
f3d2e786 | 503 | /* |
c5fc42ac | 504 | * Initialize the root table array from the RSDT/XSDT |
f3d2e786 | 505 | */ |
c5fc42ac | 506 | for (i = 0; i < table_count; i++) { |
f3d2e786 BM |
507 | if (acpi_gbl_root_table_list.count >= |
508 | acpi_gbl_root_table_list.size) { | |
c5fc42ac BM |
509 | |
510 | /* There is no more room in the root table array, attempt resize */ | |
511 | ||
f3d2e786 BM |
512 | status = acpi_tb_resize_root_table_list(); |
513 | if (ACPI_FAILURE(status)) { | |
514 | ACPI_WARNING((AE_INFO, | |
515 | "Truncating %u table entries!", | |
516 | (unsigned) | |
517 | (acpi_gbl_root_table_list.size - | |
518 | acpi_gbl_root_table_list. | |
519 | count))); | |
520 | break; | |
521 | } | |
522 | } | |
523 | ||
a4bbb810 BM |
524 | /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ |
525 | ||
526 | acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count]. | |
527 | address = | |
528 | acpi_tb_get_root_table_entry(table_entry, table_entry_size); | |
f3d2e786 | 529 | |
c5fc42ac | 530 | table_entry += table_entry_size; |
f3d2e786 | 531 | acpi_gbl_root_table_list.count++; |
1da177e4 | 532 | } |
793c2388 | 533 | |
f3d2e786 BM |
534 | /* |
535 | * It is not possible to map more than one entry in some environments, | |
536 | * so unmap the root table here before mapping other tables | |
537 | */ | |
538 | acpi_os_unmap_memory(table, length); | |
539 | ||
c5fc42ac BM |
540 | /* |
541 | * Complete the initialization of the root table array by examining | |
542 | * the header of each table | |
543 | */ | |
f3d2e786 | 544 | for (i = 2; i < acpi_gbl_root_table_list.count; i++) { |
c5fc42ac BM |
545 | acpi_tb_install_table(acpi_gbl_root_table_list.tables[i]. |
546 | address, flags, NULL, i); | |
f3d2e786 | 547 | |
c5fc42ac | 548 | /* Special case for FADT - get the DSDT and FACS */ |
f3d2e786 | 549 | |
c5fc42ac BM |
550 | if (ACPI_COMPARE_NAME |
551 | (&acpi_gbl_root_table_list.tables[i].signature, | |
552 | ACPI_SIG_FADT)) { | |
553 | acpi_tb_parse_fadt(i, flags); | |
f3d2e786 BM |
554 | } |
555 | } | |
556 | ||
557 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 558 | } |