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authorBob Moore <robert.moore@intel.com>2007-02-02 11:48:18 -0500
committerLen Brown <len.brown@intel.com>2007-02-02 21:14:21 -0500
commitf3d2e7865c816258c699ff965768e46b50d536d3 (patch)
tree83d21269e506109275b77d3ed161883bba8a39cf /drivers/acpi/tables/tbconvrt.c
parent2e42005bcdb4f63bed1cea7f537a5534d4bd7a57 (diff)
ACPICA: Implement simplified Table Manager
The Table Manager component has been completely redesigned and reimplemented. The new design is much simpler, and reduces the overall code and data size of the kernel-resident ACPICA by approximately 5%. Also, it is now possible to obtain the ACPI tables very early during kernel initialization, even before dynamic memory management is initialized. Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/tables/tbconvrt.c')
-rw-r--r--drivers/acpi/tables/tbconvrt.c622
1 files changed, 0 insertions, 622 deletions
diff --git a/drivers/acpi/tables/tbconvrt.c b/drivers/acpi/tables/tbconvrt.c
deleted file mode 100644
index d697fcb35d52..000000000000
--- a/drivers/acpi/tables/tbconvrt.c
+++ /dev/null
@@ -1,622 +0,0 @@
1/******************************************************************************
2 *
3 * Module Name: tbconvrt - ACPI Table conversion utilities
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2006, R. Byron Moore
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
44#include <acpi/acpi.h>
45#include <acpi/actables.h>
46
47#define _COMPONENT ACPI_TABLES
48ACPI_MODULE_NAME("tbconvrt")
49
50/* Local prototypes */
51static void
52acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
53 u8 register_bit_width,
54 acpi_physical_address address);
55
56static void
57acpi_tb_convert_fadt1(struct fadt_descriptor *local_fadt,
58 struct fadt_descriptor_rev1 *original_fadt);
59
60static void
61acpi_tb_convert_fadt2(struct fadt_descriptor *local_fadt,
62 struct fadt_descriptor *original_fadt);
63
64u8 acpi_fadt_is_v1;
65ACPI_EXPORT_SYMBOL(acpi_fadt_is_v1)
66
67/*******************************************************************************
68 *
69 * FUNCTION: acpi_tb_get_table_count
70 *
71 * PARAMETERS: RSDP - Pointer to the RSDP
72 * RSDT - Pointer to the RSDT/XSDT
73 *
74 * RETURN: The number of tables pointed to by the RSDT or XSDT.
75 *
76 * DESCRIPTION: Calculate the number of tables. Automatically handles either
77 * an RSDT or XSDT.
78 *
79 ******************************************************************************/
80
81u32
82acpi_tb_get_table_count(struct rsdp_descriptor *RSDP,
83 struct acpi_table_header *RSDT)
84{
85 u32 pointer_size;
86
87 ACPI_FUNCTION_ENTRY();
88
89 /* RSDT pointers are 32 bits, XSDT pointers are 64 bits */
90
91 if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
92 pointer_size = sizeof(u32);
93 } else {
94 pointer_size = sizeof(u64);
95 }
96
97 /*
98 * Determine the number of tables pointed to by the RSDT/XSDT.
99 * This is defined by the ACPI Specification to be the number of
100 * pointers contained within the RSDT/XSDT. The size of the pointers
101 * is architecture-dependent.
102 */
103 return ((RSDT->length -
104 sizeof(struct acpi_table_header)) / pointer_size);
105}
106
107/*******************************************************************************
108 *
109 * FUNCTION: acpi_tb_convert_to_xsdt
110 *
111 * PARAMETERS: table_info - Info about the RSDT
112 *
113 * RETURN: Status
114 *
115 * DESCRIPTION: Convert an RSDT to an XSDT (internal common format)
116 *
117 ******************************************************************************/
118
119acpi_status acpi_tb_convert_to_xsdt(struct acpi_table_desc *table_info)
120{
121 acpi_size table_size;
122 u32 i;
123 struct xsdt_descriptor *new_table;
124
125 ACPI_FUNCTION_ENTRY();
126
127 /* Compute size of the converted XSDT */
128
129 table_size = ((acpi_size) acpi_gbl_rsdt_table_count * sizeof(u64)) +
130 sizeof(struct acpi_table_header);
131
132 /* Allocate an XSDT */
133
134 new_table = ACPI_ALLOCATE_ZEROED(table_size);
135 if (!new_table) {
136 return (AE_NO_MEMORY);
137 }
138
139 /* Copy the header and set the length */
140
141 ACPI_MEMCPY(new_table, table_info->pointer,
142 sizeof(struct acpi_table_header));
143 new_table->length = (u32) table_size;
144
145 /* Copy the table pointers */
146
147 for (i = 0; i < acpi_gbl_rsdt_table_count; i++) {
148
149 /* RSDT pointers are 32 bits, XSDT pointers are 64 bits */
150
151 if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
152 ACPI_STORE_ADDRESS(new_table->table_offset_entry[i],
153 (ACPI_CAST_PTR
154 (struct rsdt_descriptor,
155 table_info->pointer))->
156 table_offset_entry[i]);
157 } else {
158 new_table->table_offset_entry[i] =
159 (ACPI_CAST_PTR(struct xsdt_descriptor,
160 table_info->pointer))->
161 table_offset_entry[i];
162 }
163 }
164
165 /* Delete the original table (either mapped or in a buffer) */
166
167 acpi_tb_delete_single_table(table_info);
168
169 /* Point the table descriptor to the new table */
170
171 table_info->pointer =
172 ACPI_CAST_PTR(struct acpi_table_header, new_table);
173 table_info->length = table_size;
174 table_info->allocation = ACPI_MEM_ALLOCATED;
175
176 return (AE_OK);
177}
178
179/*******************************************************************************
180 *
181 * FUNCTION: acpi_tb_init_generic_address
182 *
183 * PARAMETERS: new_gas_struct - GAS struct to be initialized
184 * register_bit_width - Width of this register
185 * Address - Address of the register
186 *
187 * RETURN: None
188 *
189 * DESCRIPTION: Initialize a GAS structure.
190 *
191 ******************************************************************************/
192
193static void
194acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct,
195 u8 register_bit_width,
196 acpi_physical_address address)
197{
198
199 ACPI_STORE_ADDRESS(new_gas_struct->address, address);
200
201 new_gas_struct->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
202 new_gas_struct->register_bit_width = register_bit_width;
203 new_gas_struct->register_bit_offset = 0;
204 new_gas_struct->access_width = 0;
205}
206
207/*******************************************************************************
208 *
209 * FUNCTION: acpi_tb_convert_fadt1
210 *
211 * PARAMETERS: local_fadt - Pointer to new FADT
212 * original_fadt - Pointer to old FADT
213 *
214 * RETURN: None, populates local_fadt
215 *
216 * DESCRIPTION: Convert an ACPI 1.0 FADT to common internal format
217 *
218 ******************************************************************************/
219
220static void
221acpi_tb_convert_fadt1(struct fadt_descriptor *local_fadt,
222 struct fadt_descriptor_rev1 *original_fadt)
223{
224
225 /* ACPI 1.0 FACS */
226 /* The BIOS stored FADT should agree with Revision 1.0 */
227 acpi_fadt_is_v1 = 1;
228
229 /*
230 * Copy the table header and the common part of the tables.
231 *
232 * The 2.0 table is an extension of the 1.0 table, so the entire 1.0
233 * table can be copied first, then expand some fields to 64 bits.
234 */
235 ACPI_MEMCPY(local_fadt, original_fadt,
236 sizeof(struct fadt_descriptor_rev1));
237
238 /* Convert table pointers to 64-bit fields */
239
240 ACPI_STORE_ADDRESS(local_fadt->xfirmware_ctrl,
241 local_fadt->V1_firmware_ctrl);
242 ACPI_STORE_ADDRESS(local_fadt->Xdsdt, local_fadt->V1_dsdt);
243
244 /*
245 * System Interrupt Model isn't used in ACPI 2.0
246 * (local_fadt->Reserved1 = 0;)
247 */
248
249 /*
250 * This field is set by the OEM to convey the preferred power management
251 * profile to OSPM. It doesn't have any 1.0 equivalence. Since we don't
252 * know what kind of 32-bit system this is, we will use "unspecified".
253 */
254 local_fadt->prefer_PM_profile = PM_UNSPECIFIED;
255
256 /*
257 * Processor Performance State Control. This is the value OSPM writes to
258 * the SMI_CMD register to assume processor performance state control
259 * responsibility. There isn't any equivalence in 1.0, but as many 1.x
260 * ACPI tables contain _PCT and _PSS we also keep this value, unless
261 * acpi_strict is set.
262 */
263 if (acpi_strict)
264 local_fadt->pstate_cnt = 0;
265
266 /*
267 * Support for the _CST object and C States change notification.
268 * This data item hasn't any 1.0 equivalence so leave it zero.
269 */
270 local_fadt->cst_cnt = 0;
271
272 /*
273 * FADT Rev 2 was an interim FADT released between ACPI 1.0 and ACPI 2.0.
274 * It primarily adds the FADT reset mechanism.
275 */
276 if ((original_fadt->revision == 2) &&
277 (original_fadt->length ==
278 sizeof(struct fadt_descriptor_rev2_minus))) {
279 /*
280 * Grab the entire generic address struct, plus the 1-byte reset value
281 * that immediately follows.
282 */
283 ACPI_MEMCPY(&local_fadt->reset_register,
284 &(ACPI_CAST_PTR(struct fadt_descriptor_rev2_minus,
285 original_fadt))->reset_register,
286 sizeof(struct acpi_generic_address) + 1);
287 } else {
288 /*
289 * Since there isn't any equivalence in 1.0 and since it is highly
290 * likely that a 1.0 system has legacy support.
291 */
292 local_fadt->iapc_boot_arch = BAF_LEGACY_DEVICES;
293 }
294
295 /*
296 * Convert the V1.0 block addresses to V2.0 GAS structures
297 */
298 acpi_tb_init_generic_address(&local_fadt->xpm1a_evt_blk,
299 local_fadt->pm1_evt_len,
300 (acpi_physical_address) local_fadt->
301 V1_pm1a_evt_blk);
302 acpi_tb_init_generic_address(&local_fadt->xpm1b_evt_blk,
303 local_fadt->pm1_evt_len,
304 (acpi_physical_address) local_fadt->
305 V1_pm1b_evt_blk);
306 acpi_tb_init_generic_address(&local_fadt->xpm1a_cnt_blk,
307 local_fadt->pm1_cnt_len,
308 (acpi_physical_address) local_fadt->
309 V1_pm1a_cnt_blk);
310 acpi_tb_init_generic_address(&local_fadt->xpm1b_cnt_blk,
311 local_fadt->pm1_cnt_len,
312 (acpi_physical_address) local_fadt->
313 V1_pm1b_cnt_blk);
314 acpi_tb_init_generic_address(&local_fadt->xpm2_cnt_blk,
315 local_fadt->pm2_cnt_len,
316 (acpi_physical_address) local_fadt->
317 V1_pm2_cnt_blk);
318 acpi_tb_init_generic_address(&local_fadt->xpm_tmr_blk,
319 local_fadt->pm_tm_len,
320 (acpi_physical_address) local_fadt->
321 V1_pm_tmr_blk);
322 acpi_tb_init_generic_address(&local_fadt->xgpe0_blk, 0,
323 (acpi_physical_address) local_fadt->
324 V1_gpe0_blk);
325 acpi_tb_init_generic_address(&local_fadt->xgpe1_blk, 0,
326 (acpi_physical_address) local_fadt->
327 V1_gpe1_blk);
328
329 /* Create separate GAS structs for the PM1 Enable registers */
330
331 acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
332 (u8) ACPI_DIV_2(acpi_gbl_FADT->
333 pm1_evt_len),
334 (acpi_physical_address)
335 (local_fadt->xpm1a_evt_blk.address +
336 ACPI_DIV_2(acpi_gbl_FADT->pm1_evt_len)));
337
338 /* PM1B is optional; leave null if not present */
339
340 if (local_fadt->xpm1b_evt_blk.address) {
341 acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
342 (u8) ACPI_DIV_2(acpi_gbl_FADT->
343 pm1_evt_len),
344 (acpi_physical_address)
345 (local_fadt->xpm1b_evt_blk.
346 address +
347 ACPI_DIV_2(acpi_gbl_FADT->
348 pm1_evt_len)));
349 }
350}
351
352/*******************************************************************************
353 *
354 * FUNCTION: acpi_tb_convert_fadt2
355 *
356 * PARAMETERS: local_fadt - Pointer to new FADT
357 * original_fadt - Pointer to old FADT
358 *
359 * RETURN: None, populates local_fadt
360 *
361 * DESCRIPTION: Convert an ACPI 2.0 FADT to common internal format.
362 * Handles optional "X" fields.
363 *
364 ******************************************************************************/
365
366static void
367acpi_tb_convert_fadt2(struct fadt_descriptor *local_fadt,
368 struct fadt_descriptor *original_fadt)
369{
370
371 /* We have an ACPI 2.0 FADT but we must copy it to our local buffer */
372
373 ACPI_MEMCPY(local_fadt, original_fadt, sizeof(struct fadt_descriptor));
374
375 /*
376 * "X" fields are optional extensions to the original V1.0 fields, so
377 * we must selectively expand V1.0 fields if the corresponding X field
378 * is zero.
379 */
380 if (!(local_fadt->xfirmware_ctrl)) {
381 ACPI_STORE_ADDRESS(local_fadt->xfirmware_ctrl,
382 local_fadt->V1_firmware_ctrl);
383 }
384
385 if (!(local_fadt->Xdsdt)) {
386 ACPI_STORE_ADDRESS(local_fadt->Xdsdt, local_fadt->V1_dsdt);
387 }
388
389 if (!(local_fadt->xpm1a_evt_blk.address)) {
390 acpi_tb_init_generic_address(&local_fadt->xpm1a_evt_blk,
391 local_fadt->pm1_evt_len,
392 (acpi_physical_address)
393 local_fadt->V1_pm1a_evt_blk);
394 }
395
396 if (!(local_fadt->xpm1b_evt_blk.address)) {
397 acpi_tb_init_generic_address(&local_fadt->xpm1b_evt_blk,
398 local_fadt->pm1_evt_len,
399 (acpi_physical_address)
400 local_fadt->V1_pm1b_evt_blk);
401 }
402
403 if (!(local_fadt->xpm1a_cnt_blk.address)) {
404 acpi_tb_init_generic_address(&local_fadt->xpm1a_cnt_blk,
405 local_fadt->pm1_cnt_len,
406 (acpi_physical_address)
407 local_fadt->V1_pm1a_cnt_blk);
408 }
409
410 if (!(local_fadt->xpm1b_cnt_blk.address)) {
411 acpi_tb_init_generic_address(&local_fadt->xpm1b_cnt_blk,
412 local_fadt->pm1_cnt_len,
413 (acpi_physical_address)
414 local_fadt->V1_pm1b_cnt_blk);
415 }
416
417 if (!(local_fadt->xpm2_cnt_blk.address)) {
418 acpi_tb_init_generic_address(&local_fadt->xpm2_cnt_blk,
419 local_fadt->pm2_cnt_len,
420 (acpi_physical_address)
421 local_fadt->V1_pm2_cnt_blk);
422 }
423
424 if (!(local_fadt->xpm_tmr_blk.address)) {
425 acpi_tb_init_generic_address(&local_fadt->xpm_tmr_blk,
426 local_fadt->pm_tm_len,
427 (acpi_physical_address)
428 local_fadt->V1_pm_tmr_blk);
429 }
430
431 if (!(local_fadt->xgpe0_blk.address)) {
432 acpi_tb_init_generic_address(&local_fadt->xgpe0_blk,
433 0,
434 (acpi_physical_address)
435 local_fadt->V1_gpe0_blk);
436 }
437
438 if (!(local_fadt->xgpe1_blk.address)) {
439 acpi_tb_init_generic_address(&local_fadt->xgpe1_blk,
440 0,
441 (acpi_physical_address)
442 local_fadt->V1_gpe1_blk);
443 }
444
445 /* Create separate GAS structs for the PM1 Enable registers */
446
447 acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable,
448 (u8) ACPI_DIV_2(acpi_gbl_FADT->
449 pm1_evt_len),
450 (acpi_physical_address)
451 (local_fadt->xpm1a_evt_blk.address +
452 ACPI_DIV_2(acpi_gbl_FADT->pm1_evt_len)));
453
454 acpi_gbl_xpm1a_enable.address_space_id =
455 local_fadt->xpm1a_evt_blk.address_space_id;
456
457 /* PM1B is optional; leave null if not present */
458
459 if (local_fadt->xpm1b_evt_blk.address) {
460 acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable,
461 (u8) ACPI_DIV_2(acpi_gbl_FADT->
462 pm1_evt_len),
463 (acpi_physical_address)
464 (local_fadt->xpm1b_evt_blk.
465 address +
466 ACPI_DIV_2(acpi_gbl_FADT->
467 pm1_evt_len)));
468
469 acpi_gbl_xpm1b_enable.address_space_id =
470 local_fadt->xpm1b_evt_blk.address_space_id;
471 }
472}
473
474/*******************************************************************************
475 *
476 * FUNCTION: acpi_tb_convert_table_fadt
477 *
478 * PARAMETERS: None
479 *
480 * RETURN: Status
481 *
482 * DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local
483 * ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply
484 * copied to the local FADT. The ACPI CA software uses this
485 * local FADT. Thus a significant amount of special #ifdef
486 * type codeing is saved.
487 *
488 ******************************************************************************/
489
490acpi_status acpi_tb_convert_table_fadt(void)
491{
492 struct fadt_descriptor *local_fadt;
493 struct acpi_table_desc *table_desc;
494
495 ACPI_FUNCTION_TRACE(tb_convert_table_fadt);
496
497 /*
498 * acpi_gbl_FADT is valid. Validate the FADT length. The table must be
499 * at least as long as the version 1.0 FADT
500 */
501 if (acpi_gbl_FADT->length < sizeof(struct fadt_descriptor_rev1)) {
502 ACPI_ERROR((AE_INFO, "FADT is invalid, too short: 0x%X",
503 acpi_gbl_FADT->length));
504 return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
505 }
506
507 /* Allocate buffer for the ACPI 2.0(+) FADT */
508
509 local_fadt = ACPI_ALLOCATE_ZEROED(sizeof(struct fadt_descriptor));
510 if (!local_fadt) {
511 return_ACPI_STATUS(AE_NO_MEMORY);
512 }
513
514 if (acpi_gbl_FADT->revision >= FADT2_REVISION_ID) {
515 if (acpi_gbl_FADT->length < sizeof(struct fadt_descriptor)) {
516
517 /* Length is too short to be a V2.0 table */
518
519 ACPI_WARNING((AE_INFO,
520 "Inconsistent FADT length (0x%X) and revision (0x%X), using FADT V1.0 portion of table",
521 acpi_gbl_FADT->length,
522 acpi_gbl_FADT->revision));
523
524 acpi_tb_convert_fadt1(local_fadt,
525 (void *)acpi_gbl_FADT);
526 } else {
527 /* Valid V2.0 table */
528
529 acpi_tb_convert_fadt2(local_fadt, acpi_gbl_FADT);
530 }
531 } else {
532 /* Valid V1.0 table */
533
534 acpi_tb_convert_fadt1(local_fadt, (void *)acpi_gbl_FADT);
535 }
536
537 /* Global FADT pointer will point to the new common V2.0 FADT */
538
539 acpi_gbl_FADT = local_fadt;
540 acpi_gbl_FADT->length = sizeof(struct fadt_descriptor);
541
542 /* Free the original table */
543
544 table_desc = acpi_gbl_table_lists[ACPI_TABLE_ID_FADT].next;
545 acpi_tb_delete_single_table(table_desc);
546
547 /* Install the new table */
548
549 table_desc->pointer =
550 ACPI_CAST_PTR(struct acpi_table_header, acpi_gbl_FADT);
551 table_desc->allocation = ACPI_MEM_ALLOCATED;
552 table_desc->length = sizeof(struct fadt_descriptor);
553
554 /* Dump the entire FADT */
555
556 ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
557 "Hex dump of common internal FADT, size %d (%X)\n",
558 acpi_gbl_FADT->length, acpi_gbl_FADT->length));
559
560 ACPI_DUMP_BUFFER(ACPI_CAST_PTR(u8, acpi_gbl_FADT),
561 acpi_gbl_FADT->length);
562
563 return_ACPI_STATUS(AE_OK);
564}
565
566/*******************************************************************************
567 *
568 * FUNCTION: acpi_tb_build_common_facs
569 *
570 * PARAMETERS: table_info - Info for currently installed FACS
571 *
572 * RETURN: Status
573 *
574 * DESCRIPTION: Convert ACPI 1.0 and ACPI 2.0 FACS to a common internal
575 * table format.
576 *
577 ******************************************************************************/
578
579acpi_status acpi_tb_build_common_facs(struct acpi_table_desc *table_info)
580{
581
582 ACPI_FUNCTION_TRACE(tb_build_common_facs);
583
584 /* Absolute minimum length is 24, but the ACPI spec says 64 */
585
586 if (acpi_gbl_FACS->length < 24) {
587 ACPI_ERROR((AE_INFO, "Invalid FACS table length: 0x%X",
588 acpi_gbl_FACS->length));
589 return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
590 }
591
592 if (acpi_gbl_FACS->length < 64) {
593 ACPI_WARNING((AE_INFO,
594 "FACS is shorter than the ACPI specification allows: 0x%X, using anyway",
595 acpi_gbl_FACS->length));
596 }
597
598 /* Copy fields to the new FACS */
599
600 acpi_gbl_common_fACS.global_lock = &(acpi_gbl_FACS->global_lock);
601
602 if ((acpi_gbl_RSDP->revision < 2) ||
603 (acpi_gbl_FACS->length < 32) ||
604 (!(acpi_gbl_FACS->xfirmware_waking_vector))) {
605
606 /* ACPI 1.0 FACS or short table or optional X_ field is zero */
607
608 acpi_gbl_common_fACS.firmware_waking_vector = ACPI_CAST_PTR(u64,
609 &
610 (acpi_gbl_FACS->
611 firmware_waking_vector));
612 acpi_gbl_common_fACS.vector_width = 32;
613 } else {
614 /* ACPI 2.0 FACS with valid X_ field */
615
616 acpi_gbl_common_fACS.firmware_waking_vector =
617 &acpi_gbl_FACS->xfirmware_waking_vector;
618 acpi_gbl_common_fACS.vector_width = 64;
619 }
620
621 return_ACPI_STATUS(AE_OK);
622}
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-10 03:00:47 -0500