Merge /spare/repo/linux-2.6/
[deliverable/linux.git] / drivers / acpi / tables / tbconvrt.c
1 /******************************************************************************
2 *
3 * Module Name: tbconvrt - ACPI Table conversion utilities
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2005, 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 <linux/module.h>
45
46 #include <acpi/acpi.h>
47 #include <acpi/actables.h>
48
49
50 #define _COMPONENT ACPI_TABLES
51 ACPI_MODULE_NAME ("tbconvrt")
52
53 /* Local prototypes */
54
55 static void
56 acpi_tb_init_generic_address (
57 struct acpi_generic_address *new_gas_struct,
58 u8 register_bit_width,
59 acpi_physical_address address);
60
61 static void
62 acpi_tb_convert_fadt1 (
63 struct fadt_descriptor_rev2 *local_fadt,
64 struct fadt_descriptor_rev1 *original_fadt);
65
66 static void
67 acpi_tb_convert_fadt2 (
68 struct fadt_descriptor_rev2 *local_fadt,
69 struct fadt_descriptor_rev2 *original_fadt);
70
71
72 u8 acpi_fadt_is_v1;
73 EXPORT_SYMBOL(acpi_fadt_is_v1);
74
75 /*******************************************************************************
76 *
77 * FUNCTION: acpi_tb_get_table_count
78 *
79 * PARAMETERS: RSDP - Pointer to the RSDP
80 * RSDT - Pointer to the RSDT/XSDT
81 *
82 * RETURN: The number of tables pointed to by the RSDT or XSDT.
83 *
84 * DESCRIPTION: Calculate the number of tables. Automatically handles either
85 * an RSDT or XSDT.
86 *
87 ******************************************************************************/
88
89 u32
90 acpi_tb_get_table_count (
91 struct rsdp_descriptor *RSDP,
92 struct acpi_table_header *RSDT)
93 {
94 u32 pointer_size;
95
96
97 ACPI_FUNCTION_ENTRY ();
98
99
100 if (RSDP->revision < 2) {
101 pointer_size = sizeof (u32);
102 }
103 else {
104 pointer_size = sizeof (u64);
105 }
106
107 /*
108 * Determine the number of tables pointed to by the RSDT/XSDT.
109 * This is defined by the ACPI Specification to be the number of
110 * pointers contained within the RSDT/XSDT. The size of the pointers
111 * is architecture-dependent.
112 */
113 return ((RSDT->length - sizeof (struct acpi_table_header)) / pointer_size);
114 }
115
116
117 /*******************************************************************************
118 *
119 * FUNCTION: acpi_tb_convert_to_xsdt
120 *
121 * PARAMETERS: table_info - Info about the RSDT
122 *
123 * RETURN: Status
124 *
125 * DESCRIPTION: Convert an RSDT to an XSDT (internal common format)
126 *
127 ******************************************************************************/
128
129 acpi_status
130 acpi_tb_convert_to_xsdt (
131 struct acpi_table_desc *table_info)
132 {
133 acpi_size table_size;
134 u32 i;
135 XSDT_DESCRIPTOR *new_table;
136
137
138 ACPI_FUNCTION_ENTRY ();
139
140
141 /* Compute size of the converted XSDT */
142
143 table_size = ((acpi_size) acpi_gbl_rsdt_table_count * sizeof (u64)) +
144 sizeof (struct acpi_table_header);
145
146 /* Allocate an XSDT */
147
148 new_table = ACPI_MEM_CALLOCATE (table_size);
149 if (!new_table) {
150 return (AE_NO_MEMORY);
151 }
152
153 /* Copy the header and set the length */
154
155 ACPI_MEMCPY (new_table, table_info->pointer, sizeof (struct acpi_table_header));
156 new_table->length = (u32) table_size;
157
158 /* Copy the table pointers */
159
160 for (i = 0; i < acpi_gbl_rsdt_table_count; i++) {
161 if (acpi_gbl_RSDP->revision < 2) {
162 ACPI_STORE_ADDRESS (new_table->table_offset_entry[i],
163 (ACPI_CAST_PTR (struct rsdt_descriptor_rev1,
164 table_info->pointer))->table_offset_entry[i]);
165 }
166 else {
167 new_table->table_offset_entry[i] =
168 (ACPI_CAST_PTR (XSDT_DESCRIPTOR,
169 table_info->pointer))->table_offset_entry[i];
170 }
171 }
172
173 /* Delete the original table (either mapped or in a buffer) */
174
175 acpi_tb_delete_single_table (table_info);
176
177 /* Point the table descriptor to the new table */
178
179 table_info->pointer = ACPI_CAST_PTR (struct acpi_table_header, new_table);
180 table_info->length = table_size;
181 table_info->allocation = ACPI_MEM_ALLOCATED;
182
183 return (AE_OK);
184 }
185
186
187 /*******************************************************************************
188 *
189 * FUNCTION: acpi_tb_init_generic_address
190 *
191 * PARAMETERS: new_gas_struct - GAS struct to be initialized
192 * register_bit_width - Width of this register
193 * Address - Address of the register
194 *
195 * RETURN: None
196 *
197 * DESCRIPTION: Initialize a GAS structure.
198 *
199 ******************************************************************************/
200
201 static void
202 acpi_tb_init_generic_address (
203 struct acpi_generic_address *new_gas_struct,
204 u8 register_bit_width,
205 acpi_physical_address address)
206 {
207
208 ACPI_STORE_ADDRESS (new_gas_struct->address, address);
209
210 new_gas_struct->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
211 new_gas_struct->register_bit_width = register_bit_width;
212 new_gas_struct->register_bit_offset = 0;
213 new_gas_struct->access_width = 0;
214 }
215
216
217 /*******************************************************************************
218 *
219 * FUNCTION: acpi_tb_convert_fadt1
220 *
221 * PARAMETERS: local_fadt - Pointer to new FADT
222 * original_fadt - Pointer to old FADT
223 *
224 * RETURN: None, populates local_fadt
225 *
226 * DESCRIPTION: Convert an ACPI 1.0 FADT to common internal format
227 *
228 ******************************************************************************/
229
230 static void
231 acpi_tb_convert_fadt1 (
232 struct fadt_descriptor_rev2 *local_fadt,
233 struct fadt_descriptor_rev1 *original_fadt)
234 {
235
236 /* ACPI 1.0 FACS */
237 /* The BIOS stored FADT should agree with Revision 1.0 */
238 acpi_fadt_is_v1 = 1;
239
240 /*
241 * Copy the table header and the common part of the tables.
242 *
243 * The 2.0 table is an extension of the 1.0 table, so the entire 1.0
244 * table can be copied first, then expand some fields to 64 bits.
245 */
246 ACPI_MEMCPY (local_fadt, original_fadt, sizeof (struct fadt_descriptor_rev1));
247
248 /* Convert table pointers to 64-bit fields */
249
250 ACPI_STORE_ADDRESS (local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl);
251 ACPI_STORE_ADDRESS (local_fadt->Xdsdt, local_fadt->V1_dsdt);
252
253 /*
254 * System Interrupt Model isn't used in ACPI 2.0
255 * (local_fadt->Reserved1 = 0;)
256 */
257
258 /*
259 * This field is set by the OEM to convey the preferred power management
260 * profile to OSPM. It doesn't have any 1.0 equivalence. Since we don't
261 * know what kind of 32-bit system this is, we will use "unspecified".
262 */
263 local_fadt->prefer_PM_profile = PM_UNSPECIFIED;
264
265 /*
266 * Processor Performance State Control. This is the value OSPM writes to
267 * the SMI_CMD register to assume processor performance state control
268 * responsibility. There isn't any equivalence in 1.0, but as many 1.x
269 * ACPI tables contain _PCT and _PSS we also keep this value, unless
270 * acpi_strict is set.
271 */
272 if (acpi_strict)
273 local_fadt->pstate_cnt = 0;
274
275 /*
276 * Support for the _CST object and C States change notification.
277 * This data item hasn't any 1.0 equivalence so leave it zero.
278 */
279 local_fadt->cst_cnt = 0;
280
281 /*
282 * FADT Rev 2 was an interim FADT released between ACPI 1.0 and ACPI 2.0.
283 * It primarily adds the FADT reset mechanism.
284 */
285 if ((original_fadt->revision == 2) &&
286 (original_fadt->length == sizeof (struct fadt_descriptor_rev2_minus))) {
287 /*
288 * Grab the entire generic address struct, plus the 1-byte reset value
289 * that immediately follows.
290 */
291 ACPI_MEMCPY (&local_fadt->reset_register,
292 &(ACPI_CAST_PTR (struct fadt_descriptor_rev2_minus,
293 original_fadt))->reset_register,
294 sizeof (struct acpi_generic_address) + 1);
295 }
296 else {
297 /*
298 * Since there isn't any equivalence in 1.0 and since it is highly
299 * likely that a 1.0 system has legacy support.
300 */
301 local_fadt->iapc_boot_arch = BAF_LEGACY_DEVICES;
302 }
303
304 /*
305 * Convert the V1.0 block addresses to V2.0 GAS structures
306 */
307 acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk, local_fadt->pm1_evt_len,
308 (acpi_physical_address) local_fadt->V1_pm1a_evt_blk);
309 acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk, local_fadt->pm1_evt_len,
310 (acpi_physical_address) local_fadt->V1_pm1b_evt_blk);
311 acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk, local_fadt->pm1_cnt_len,
312 (acpi_physical_address) local_fadt->V1_pm1a_cnt_blk);
313 acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk, local_fadt->pm1_cnt_len,
314 (acpi_physical_address) local_fadt->V1_pm1b_cnt_blk);
315 acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk, local_fadt->pm2_cnt_len,
316 (acpi_physical_address) local_fadt->V1_pm2_cnt_blk);
317 acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk, local_fadt->pm_tm_len,
318 (acpi_physical_address) local_fadt->V1_pm_tmr_blk);
319 acpi_tb_init_generic_address (&local_fadt->xgpe0_blk, 0,
320 (acpi_physical_address) local_fadt->V1_gpe0_blk);
321 acpi_tb_init_generic_address (&local_fadt->xgpe1_blk, 0,
322 (acpi_physical_address) local_fadt->V1_gpe1_blk);
323
324 /* Create separate GAS structs for the PM1 Enable registers */
325
326 acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
327 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
328 (acpi_physical_address)
329 (local_fadt->xpm1a_evt_blk.address +
330 ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
331
332 /* PM1B is optional; leave null if not present */
333
334 if (local_fadt->xpm1b_evt_blk.address) {
335 acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
336 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
337 (acpi_physical_address)
338 (local_fadt->xpm1b_evt_blk.address +
339 ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
340 }
341 }
342
343
344 /*******************************************************************************
345 *
346 * FUNCTION: acpi_tb_convert_fadt2
347 *
348 * PARAMETERS: local_fadt - Pointer to new FADT
349 * original_fadt - Pointer to old FADT
350 *
351 * RETURN: None, populates local_fadt
352 *
353 * DESCRIPTION: Convert an ACPI 2.0 FADT to common internal format.
354 * Handles optional "X" fields.
355 *
356 ******************************************************************************/
357
358 static void
359 acpi_tb_convert_fadt2 (
360 struct fadt_descriptor_rev2 *local_fadt,
361 struct fadt_descriptor_rev2 *original_fadt)
362 {
363
364 /* We have an ACPI 2.0 FADT but we must copy it to our local buffer */
365
366 ACPI_MEMCPY (local_fadt, original_fadt, sizeof (struct fadt_descriptor_rev2));
367
368 /*
369 * "X" fields are optional extensions to the original V1.0 fields, so
370 * we must selectively expand V1.0 fields if the corresponding X field
371 * is zero.
372 */
373 if (!(local_fadt->xfirmware_ctrl)) {
374 ACPI_STORE_ADDRESS (local_fadt->xfirmware_ctrl,
375 local_fadt->V1_firmware_ctrl);
376 }
377
378 if (!(local_fadt->Xdsdt)) {
379 ACPI_STORE_ADDRESS (local_fadt->Xdsdt, local_fadt->V1_dsdt);
380 }
381
382 if (!(local_fadt->xpm1a_evt_blk.address)) {
383 acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk,
384 local_fadt->pm1_evt_len,
385 (acpi_physical_address) local_fadt->V1_pm1a_evt_blk);
386 }
387
388 if (!(local_fadt->xpm1b_evt_blk.address)) {
389 acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk,
390 local_fadt->pm1_evt_len,
391 (acpi_physical_address) local_fadt->V1_pm1b_evt_blk);
392 }
393
394 if (!(local_fadt->xpm1a_cnt_blk.address)) {
395 acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk,
396 local_fadt->pm1_cnt_len,
397 (acpi_physical_address) local_fadt->V1_pm1a_cnt_blk);
398 }
399
400 if (!(local_fadt->xpm1b_cnt_blk.address)) {
401 acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk,
402 local_fadt->pm1_cnt_len,
403 (acpi_physical_address) local_fadt->V1_pm1b_cnt_blk);
404 }
405
406 if (!(local_fadt->xpm2_cnt_blk.address)) {
407 acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk,
408 local_fadt->pm2_cnt_len,
409 (acpi_physical_address) local_fadt->V1_pm2_cnt_blk);
410 }
411
412 if (!(local_fadt->xpm_tmr_blk.address)) {
413 acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk,
414 local_fadt->pm_tm_len,
415 (acpi_physical_address) local_fadt->V1_pm_tmr_blk);
416 }
417
418 if (!(local_fadt->xgpe0_blk.address)) {
419 acpi_tb_init_generic_address (&local_fadt->xgpe0_blk,
420 0, (acpi_physical_address) local_fadt->V1_gpe0_blk);
421 }
422
423 if (!(local_fadt->xgpe1_blk.address)) {
424 acpi_tb_init_generic_address (&local_fadt->xgpe1_blk,
425 0, (acpi_physical_address) local_fadt->V1_gpe1_blk);
426 }
427
428 /* Create separate GAS structs for the PM1 Enable registers */
429
430 acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
431 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
432 (acpi_physical_address)
433 (local_fadt->xpm1a_evt_blk.address +
434 ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
435
436 acpi_gbl_xpm1a_enable.address_space_id =
437 local_fadt->xpm1a_evt_blk.address_space_id;
438
439 /* PM1B is optional; leave null if not present */
440
441 if (local_fadt->xpm1b_evt_blk.address) {
442 acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
443 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
444 (acpi_physical_address)
445 (local_fadt->xpm1b_evt_blk.address +
446 ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
447
448 acpi_gbl_xpm1b_enable.address_space_id =
449 local_fadt->xpm1b_evt_blk.address_space_id;
450 }
451 }
452
453
454 /*******************************************************************************
455 *
456 * FUNCTION: acpi_tb_convert_table_fadt
457 *
458 * PARAMETERS: None
459 *
460 * RETURN: Status
461 *
462 * DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local
463 * ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply
464 * copied to the local FADT. The ACPI CA software uses this
465 * local FADT. Thus a significant amount of special #ifdef
466 * type codeing is saved.
467 *
468 ******************************************************************************/
469
470 acpi_status
471 acpi_tb_convert_table_fadt (
472 void)
473 {
474 struct fadt_descriptor_rev2 *local_fadt;
475 struct acpi_table_desc *table_desc;
476
477
478 ACPI_FUNCTION_TRACE ("tb_convert_table_fadt");
479
480
481 /*
482 * acpi_gbl_FADT is valid. Validate the FADT length. The table must be
483 * at least as long as the version 1.0 FADT
484 */
485 if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev1)) {
486 ACPI_REPORT_ERROR (("FADT is invalid, too short: 0x%X\n",
487 acpi_gbl_FADT->length));
488 return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
489 }
490
491 /* Allocate buffer for the ACPI 2.0(+) FADT */
492
493 local_fadt = ACPI_MEM_CALLOCATE (sizeof (struct fadt_descriptor_rev2));
494 if (!local_fadt) {
495 return_ACPI_STATUS (AE_NO_MEMORY);
496 }
497
498 if (acpi_gbl_FADT->revision >= FADT2_REVISION_ID) {
499 if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev2)) {
500 /* Length is too short to be a V2.0 table */
501
502 ACPI_REPORT_WARNING ((
503 "Inconsistent FADT length (0x%X) and revision (0x%X), using FADT V1.0 portion of table\n",
504 acpi_gbl_FADT->length, acpi_gbl_FADT->revision));
505
506 acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
507 }
508 else {
509 /* Valid V2.0 table */
510
511 acpi_tb_convert_fadt2 (local_fadt, acpi_gbl_FADT);
512 }
513 }
514 else {
515 /* Valid V1.0 table */
516
517 acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
518 }
519
520 /* Global FADT pointer will point to the new common V2.0 FADT */
521
522 acpi_gbl_FADT = local_fadt;
523 acpi_gbl_FADT->length = sizeof (FADT_DESCRIPTOR);
524
525 /* Free the original table */
526
527 table_desc = acpi_gbl_table_lists[ACPI_TABLE_FADT].next;
528 acpi_tb_delete_single_table (table_desc);
529
530 /* Install the new table */
531
532 table_desc->pointer = ACPI_CAST_PTR (struct acpi_table_header, acpi_gbl_FADT);
533 table_desc->allocation = ACPI_MEM_ALLOCATED;
534 table_desc->length = sizeof (struct fadt_descriptor_rev2);
535
536 /* Dump the entire FADT */
537
538 ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
539 "Hex dump of common internal FADT, size %d (%X)\n",
540 acpi_gbl_FADT->length, acpi_gbl_FADT->length));
541 ACPI_DUMP_BUFFER ((u8 *) (acpi_gbl_FADT), acpi_gbl_FADT->length);
542
543 return_ACPI_STATUS (AE_OK);
544 }
545
546
547 /*******************************************************************************
548 *
549 * FUNCTION: acpi_tb_build_common_facs
550 *
551 * PARAMETERS: table_info - Info for currently installed FACS
552 *
553 * RETURN: Status
554 *
555 * DESCRIPTION: Convert ACPI 1.0 and ACPI 2.0 FACS to a common internal
556 * table format.
557 *
558 ******************************************************************************/
559
560 acpi_status
561 acpi_tb_build_common_facs (
562 struct acpi_table_desc *table_info)
563 {
564
565 ACPI_FUNCTION_TRACE ("tb_build_common_facs");
566
567
568 /* Absolute minimum length is 24, but the ACPI spec says 64 */
569
570 if (acpi_gbl_FACS->length < 24) {
571 ACPI_REPORT_ERROR (("Invalid FACS table length: 0x%X\n",
572 acpi_gbl_FACS->length));
573 return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
574 }
575
576 if (acpi_gbl_FACS->length < 64) {
577 ACPI_REPORT_WARNING ((
578 "FACS is shorter than the ACPI specification allows: 0x%X, using anyway\n",
579 acpi_gbl_FACS->length));
580 }
581
582 /* Copy fields to the new FACS */
583
584 acpi_gbl_common_fACS.global_lock = &(acpi_gbl_FACS->global_lock);
585
586 if ((acpi_gbl_RSDP->revision < 2) ||
587 (acpi_gbl_FACS->length < 32) ||
588 (!(acpi_gbl_FACS->xfirmware_waking_vector))) {
589 /* ACPI 1.0 FACS or short table or optional X_ field is zero */
590
591 acpi_gbl_common_fACS.firmware_waking_vector = ACPI_CAST_PTR (u64,
592 &(acpi_gbl_FACS->firmware_waking_vector));
593 acpi_gbl_common_fACS.vector_width = 32;
594 }
595 else {
596 /* ACPI 2.0 FACS with valid X_ field */
597
598 acpi_gbl_common_fACS.firmware_waking_vector = &acpi_gbl_FACS->xfirmware_waking_vector;
599 acpi_gbl_common_fACS.vector_width = 64;
600 }
601
602 return_ACPI_STATUS (AE_OK);
603 }
604
605
This page took 0.059227 seconds and 6 git commands to generate.