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95befdb3 BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: tbfadt - FADT table utilities | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
77848130 | 8 | * Copyright (C) 2000 - 2012, Intel Corp. |
95befdb3 BM |
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> | |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "actables.h" | |
95befdb3 BM |
47 | |
48 | #define _COMPONENT ACPI_TABLES | |
49 | ACPI_MODULE_NAME("tbfadt") | |
50 | ||
51 | /* Local prototypes */ | |
66be71ff | 52 | static void |
ea5d8ebc | 53 | acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, |
66be71ff BM |
54 | u8 space_id, |
55 | u8 byte_width, u64 address, char *register_name); | |
95befdb3 | 56 | |
71392844 BM |
57 | static void acpi_tb_convert_fadt(void); |
58 | ||
59 | static void acpi_tb_validate_fadt(void); | |
60 | ||
531c633d BM |
61 | static void acpi_tb_setup_fadt_registers(void); |
62 | ||
ea5d8ebc | 63 | /* Table for conversion of FADT to common internal format and FADT validation */ |
95befdb3 | 64 | |
ea5d8ebc BM |
65 | typedef struct acpi_fadt_info { |
66 | char *name; | |
ecafe6fa BM |
67 | u16 address64; |
68 | u16 address32; | |
69 | u16 length; | |
4b67a0e4 | 70 | u8 default_length; |
ea5d8ebc | 71 | u8 type; |
95befdb3 | 72 | |
ea5d8ebc | 73 | } acpi_fadt_info; |
95befdb3 | 74 | |
ecafe6fa | 75 | #define ACPI_FADT_OPTIONAL 0 |
ea5d8ebc BM |
76 | #define ACPI_FADT_REQUIRED 1 |
77 | #define ACPI_FADT_SEPARATE_LENGTH 2 | |
78 | ||
79 | static struct acpi_fadt_info fadt_info_table[] = { | |
4b67a0e4 | 80 | {"Pm1aEventBlock", |
81 | ACPI_FADT_OFFSET(xpm1a_event_block), | |
95befdb3 | 82 | ACPI_FADT_OFFSET(pm1a_event_block), |
4b67a0e4 | 83 | ACPI_FADT_OFFSET(pm1_event_length), |
84 | ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ | |
85 | ACPI_FADT_REQUIRED}, | |
ea5d8ebc | 86 | |
4b67a0e4 | 87 | {"Pm1bEventBlock", |
88 | ACPI_FADT_OFFSET(xpm1b_event_block), | |
95befdb3 | 89 | ACPI_FADT_OFFSET(pm1b_event_block), |
4b67a0e4 | 90 | ACPI_FADT_OFFSET(pm1_event_length), |
91 | ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ | |
ecafe6fa | 92 | ACPI_FADT_OPTIONAL}, |
ea5d8ebc | 93 | |
4b67a0e4 | 94 | {"Pm1aControlBlock", |
95 | ACPI_FADT_OFFSET(xpm1a_control_block), | |
95befdb3 | 96 | ACPI_FADT_OFFSET(pm1a_control_block), |
4b67a0e4 | 97 | ACPI_FADT_OFFSET(pm1_control_length), |
98 | ACPI_PM1_REGISTER_WIDTH, | |
99 | ACPI_FADT_REQUIRED}, | |
ea5d8ebc | 100 | |
4b67a0e4 | 101 | {"Pm1bControlBlock", |
102 | ACPI_FADT_OFFSET(xpm1b_control_block), | |
95befdb3 | 103 | ACPI_FADT_OFFSET(pm1b_control_block), |
4b67a0e4 | 104 | ACPI_FADT_OFFSET(pm1_control_length), |
105 | ACPI_PM1_REGISTER_WIDTH, | |
ecafe6fa | 106 | ACPI_FADT_OPTIONAL}, |
ea5d8ebc | 107 | |
4b67a0e4 | 108 | {"Pm2ControlBlock", |
109 | ACPI_FADT_OFFSET(xpm2_control_block), | |
95befdb3 | 110 | ACPI_FADT_OFFSET(pm2_control_block), |
4b67a0e4 | 111 | ACPI_FADT_OFFSET(pm2_control_length), |
112 | ACPI_PM2_REGISTER_WIDTH, | |
113 | ACPI_FADT_SEPARATE_LENGTH}, | |
ea5d8ebc | 114 | |
4b67a0e4 | 115 | {"PmTimerBlock", |
116 | ACPI_FADT_OFFSET(xpm_timer_block), | |
ea5d8ebc | 117 | ACPI_FADT_OFFSET(pm_timer_block), |
4b67a0e4 | 118 | ACPI_FADT_OFFSET(pm_timer_length), |
119 | ACPI_PM_TIMER_WIDTH, | |
120 | ACPI_FADT_REQUIRED}, | |
ea5d8ebc | 121 | |
4b67a0e4 | 122 | {"Gpe0Block", |
123 | ACPI_FADT_OFFSET(xgpe0_block), | |
ea5d8ebc | 124 | ACPI_FADT_OFFSET(gpe0_block), |
4b67a0e4 | 125 | ACPI_FADT_OFFSET(gpe0_block_length), |
126 | 0, | |
127 | ACPI_FADT_SEPARATE_LENGTH}, | |
ea5d8ebc | 128 | |
4b67a0e4 | 129 | {"Gpe1Block", |
130 | ACPI_FADT_OFFSET(xgpe1_block), | |
ea5d8ebc | 131 | ACPI_FADT_OFFSET(gpe1_block), |
4b67a0e4 | 132 | ACPI_FADT_OFFSET(gpe1_block_length), |
133 | 0, | |
134 | ACPI_FADT_SEPARATE_LENGTH} | |
95befdb3 BM |
135 | }; |
136 | ||
ec41f193 BM |
137 | #define ACPI_FADT_INFO_ENTRIES \ |
138 | (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info)) | |
95befdb3 | 139 | |
531c633d BM |
140 | /* Table used to split Event Blocks into separate status/enable registers */ |
141 | ||
142 | typedef struct acpi_fadt_pm_info { | |
143 | struct acpi_generic_address *target; | |
ecafe6fa | 144 | u16 source; |
531c633d BM |
145 | u8 register_num; |
146 | ||
147 | } acpi_fadt_pm_info; | |
148 | ||
149 | static struct acpi_fadt_pm_info fadt_pm_info_table[] = { | |
150 | {&acpi_gbl_xpm1a_status, | |
151 | ACPI_FADT_OFFSET(xpm1a_event_block), | |
152 | 0}, | |
153 | ||
154 | {&acpi_gbl_xpm1a_enable, | |
155 | ACPI_FADT_OFFSET(xpm1a_event_block), | |
156 | 1}, | |
157 | ||
158 | {&acpi_gbl_xpm1b_status, | |
159 | ACPI_FADT_OFFSET(xpm1b_event_block), | |
160 | 0}, | |
161 | ||
162 | {&acpi_gbl_xpm1b_enable, | |
163 | ACPI_FADT_OFFSET(xpm1b_event_block), | |
164 | 1} | |
165 | }; | |
166 | ||
ec41f193 BM |
167 | #define ACPI_FADT_PM_INFO_ENTRIES \ |
168 | (sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info)) | |
531c633d | 169 | |
95befdb3 BM |
170 | /******************************************************************************* |
171 | * | |
172 | * FUNCTION: acpi_tb_init_generic_address | |
173 | * | |
ea5d8ebc | 174 | * PARAMETERS: generic_address - GAS struct to be initialized |
fcea94ba | 175 | * byte_width - Width of this register |
ba494bee | 176 | * address - Address of the register |
95befdb3 BM |
177 | * |
178 | * RETURN: None | |
179 | * | |
ea5d8ebc BM |
180 | * DESCRIPTION: Initialize a Generic Address Structure (GAS) |
181 | * See the ACPI specification for a full description and | |
182 | * definition of this structure. | |
95befdb3 BM |
183 | * |
184 | ******************************************************************************/ | |
185 | ||
66be71ff | 186 | static void |
ea5d8ebc | 187 | acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, |
66be71ff BM |
188 | u8 space_id, |
189 | u8 byte_width, u64 address, char *register_name) | |
95befdb3 | 190 | { |
66be71ff BM |
191 | u8 bit_width; |
192 | ||
193 | /* Bit width field in the GAS is only one byte long, 255 max */ | |
194 | ||
195 | bit_width = (u8)(byte_width * 8); | |
196 | ||
197 | if (byte_width > 31) { /* (31*8)=248 */ | |
198 | ACPI_ERROR((AE_INFO, | |
199 | "%s - 32-bit FADT register is too long (%u bytes, %u bits) " | |
200 | "to convert to GAS struct - 255 bits max, truncating", | |
201 | register_name, byte_width, (byte_width * 8))); | |
202 | ||
203 | bit_width = 255; | |
204 | } | |
95befdb3 | 205 | |
ea5d8ebc BM |
206 | /* |
207 | * The 64-bit Address field is non-aligned in the byte packed | |
208 | * GAS struct. | |
209 | */ | |
210 | ACPI_MOVE_64_TO_64(&generic_address->address, &address); | |
211 | ||
212 | /* All other fields are byte-wide */ | |
213 | ||
06f55419 | 214 | generic_address->space_id = space_id; |
66be71ff | 215 | generic_address->bit_width = bit_width; |
ea5d8ebc | 216 | generic_address->bit_offset = 0; |
06f55419 | 217 | generic_address->access_width = 0; /* Access width ANY */ |
95befdb3 BM |
218 | } |
219 | ||
220 | /******************************************************************************* | |
221 | * | |
222 | * FUNCTION: acpi_tb_parse_fadt | |
223 | * | |
224 | * PARAMETERS: table_index - Index for the FADT | |
95befdb3 BM |
225 | * |
226 | * RETURN: None | |
227 | * | |
228 | * DESCRIPTION: Initialize the FADT, DSDT and FACS tables | |
229 | * (FADT contains the addresses of the DSDT and FACS) | |
230 | * | |
231 | ******************************************************************************/ | |
232 | ||
97cbb7d1 | 233 | void acpi_tb_parse_fadt(u32 table_index) |
95befdb3 BM |
234 | { |
235 | u32 length; | |
236 | struct acpi_table_header *table; | |
237 | ||
238 | /* | |
ea5d8ebc BM |
239 | * The FADT has multiple versions with different lengths, |
240 | * and it contains pointers to both the DSDT and FACS tables. | |
95befdb3 BM |
241 | * |
242 | * Get a local copy of the FADT and convert it to a common format | |
243 | * Map entire FADT, assumed to be smaller than one page. | |
244 | */ | |
245 | length = acpi_gbl_root_table_list.tables[table_index].length; | |
246 | ||
247 | table = | |
248 | acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index]. | |
249 | address, length); | |
250 | if (!table) { | |
251 | return; | |
252 | } | |
253 | ||
254 | /* | |
255 | * Validate the FADT checksum before we copy the table. Ignore | |
256 | * checksum error as we want to try to get the DSDT and FACS. | |
257 | */ | |
258 | (void)acpi_tb_verify_checksum(table, length); | |
259 | ||
531c633d | 260 | /* Create a local copy of the FADT in common ACPI 2.0+ format */ |
71392844 BM |
261 | |
262 | acpi_tb_create_local_fadt(table, length); | |
263 | ||
264 | /* All done with the real FADT, unmap it */ | |
265 | ||
266 | acpi_os_unmap_memory(table, length); | |
267 | ||
268 | /* Obtain the DSDT and FACS tables via their addresses within the FADT */ | |
269 | ||
270 | acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt, | |
97cbb7d1 | 271 | ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT); |
71392844 | 272 | |
22e5b40a BM |
273 | /* If Hardware Reduced flag is set, there is no FACS */ |
274 | ||
275 | if (!acpi_gbl_reduced_hardware) { | |
276 | acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT. | |
277 | Xfacs, ACPI_SIG_FACS, | |
278 | ACPI_TABLE_INDEX_FACS); | |
279 | } | |
71392844 BM |
280 | } |
281 | ||
282 | /******************************************************************************* | |
283 | * | |
284 | * FUNCTION: acpi_tb_create_local_fadt | |
285 | * | |
ba494bee BM |
286 | * PARAMETERS: table - Pointer to BIOS FADT |
287 | * length - Length of the table | |
71392844 BM |
288 | * |
289 | * RETURN: None | |
290 | * | |
291 | * DESCRIPTION: Get a local copy of the FADT and convert it to a common format. | |
292 | * Performs validation on some important FADT fields. | |
293 | * | |
55f8f3cc BM |
294 | * NOTE: We create a local copy of the FADT regardless of the version. |
295 | * | |
71392844 BM |
296 | ******************************************************************************/ |
297 | ||
298 | void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length) | |
299 | { | |
ea5d8ebc | 300 | /* |
55f8f3cc | 301 | * Check if the FADT is larger than the largest table that we expect |
2355e10f | 302 | * (the ACPI 5.0 version). If so, truncate the table, and issue |
55f8f3cc | 303 | * a warning. |
ea5d8ebc BM |
304 | */ |
305 | if (length > sizeof(struct acpi_table_fadt)) { | |
3b3ea775 BM |
306 | ACPI_BIOS_WARNING((AE_INFO, |
307 | "FADT (revision %u) is longer than ACPI 5.0 version, " | |
308 | "truncating length %u to %u", | |
309 | table->revision, length, | |
310 | (u32)sizeof(struct acpi_table_fadt))); | |
ea5d8ebc | 311 | } |
95befdb3 | 312 | |
55f8f3cc | 313 | /* Clear the entire local FADT */ |
95befdb3 | 314 | |
ea5d8ebc | 315 | ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt)); |
71392844 | 316 | |
55f8f3cc BM |
317 | /* Copy the original FADT, up to sizeof (struct acpi_table_fadt) */ |
318 | ||
95befdb3 BM |
319 | ACPI_MEMCPY(&acpi_gbl_FADT, table, |
320 | ACPI_MIN(length, sizeof(struct acpi_table_fadt))); | |
95befdb3 | 321 | |
22e5b40a BM |
322 | /* Take a copy of the Hardware Reduced flag */ |
323 | ||
324 | acpi_gbl_reduced_hardware = FALSE; | |
325 | if (acpi_gbl_FADT.flags & ACPI_FADT_HW_REDUCED) { | |
326 | acpi_gbl_reduced_hardware = TRUE; | |
327 | } | |
328 | ||
531c633d BM |
329 | /* Convert the local copy of the FADT to the common internal format */ |
330 | ||
95befdb3 | 331 | acpi_tb_convert_fadt(); |
531c633d BM |
332 | |
333 | /* Validate FADT values now, before we make any changes */ | |
334 | ||
335 | acpi_tb_validate_fadt(); | |
336 | ||
337 | /* Initialize the global ACPI register structures */ | |
338 | ||
339 | acpi_tb_setup_fadt_registers(); | |
95befdb3 BM |
340 | } |
341 | ||
342 | /******************************************************************************* | |
343 | * | |
344 | * FUNCTION: acpi_tb_convert_fadt | |
345 | * | |
346 | * PARAMETERS: None, uses acpi_gbl_FADT | |
347 | * | |
348 | * RETURN: None | |
349 | * | |
350 | * DESCRIPTION: Converts all versions of the FADT to a common internal format. | |
31fbc073 | 351 | * Expand 32-bit addresses to 64-bit as necessary. |
95befdb3 | 352 | * |
e56b638b BM |
353 | * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), |
354 | * and must contain a copy of the actual FADT. | |
95befdb3 | 355 | * |
31fbc073 | 356 | * Notes on 64-bit register addresses: |
95befdb3 | 357 | * |
31fbc073 BM |
358 | * After this FADT conversion, later ACPICA code will only use the 64-bit "X" |
359 | * fields of the FADT for all ACPI register addresses. | |
95befdb3 | 360 | * |
31fbc073 BM |
361 | * The 64-bit "X" fields are optional extensions to the original 32-bit FADT |
362 | * V1.0 fields. Even if they are present in the FADT, they are optional and | |
363 | * are unused if the BIOS sets them to zero. Therefore, we must copy/expand | |
364 | * 32-bit V1.0 fields if the corresponding X field is zero. | |
95befdb3 | 365 | * |
31fbc073 BM |
366 | * For ACPI 1.0 FADTs, all 32-bit address fields are expanded to the |
367 | * corresponding "X" fields in the internal FADT. | |
368 | * | |
369 | * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded | |
370 | * to the corresponding 64-bit X fields. For compatibility with other ACPI | |
371 | * implementations, we ignore the 64-bit field if the 32-bit field is valid, | |
372 | * regardless of whether the host OS is 32-bit or 64-bit. | |
95befdb3 BM |
373 | * |
374 | ******************************************************************************/ | |
375 | ||
71392844 | 376 | static void acpi_tb_convert_fadt(void) |
95befdb3 | 377 | { |
31fbc073 BM |
378 | struct acpi_generic_address *address64; |
379 | u32 address32; | |
67a119f9 | 380 | u32 i; |
95befdb3 | 381 | |
c87609f3 BM |
382 | /* |
383 | * Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary. | |
384 | * Later code will always use the X 64-bit field. Also, check for an | |
385 | * address mismatch between the 32-bit and 64-bit address fields | |
386 | * (FIRMWARE_CTRL/X_FIRMWARE_CTRL, DSDT/X_DSDT) which would indicate | |
387 | * the presence of two FACS or two DSDT tables. | |
388 | */ | |
95befdb3 BM |
389 | if (!acpi_gbl_FADT.Xfacs) { |
390 | acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; | |
c87609f3 BM |
391 | } else if (acpi_gbl_FADT.facs && |
392 | (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) { | |
393 | ACPI_WARNING((AE_INFO, | |
394 | "32/64 FACS address mismatch in FADT - two FACS tables!")); | |
95befdb3 BM |
395 | } |
396 | ||
397 | if (!acpi_gbl_FADT.Xdsdt) { | |
398 | acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; | |
c87609f3 BM |
399 | } else if (acpi_gbl_FADT.dsdt && |
400 | (acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) { | |
401 | ACPI_WARNING((AE_INFO, | |
402 | "32/64 DSDT address mismatch in FADT - two DSDT tables!")); | |
95befdb3 BM |
403 | } |
404 | ||
405 | /* | |
55f8f3cc BM |
406 | * For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which |
407 | * should be zero are indeed zero. This will workaround BIOSs that | |
408 | * inadvertently place values in these fields. | |
409 | * | |
410 | * The ACPI 1.0 reserved fields that will be zeroed are the bytes located at | |
411 | * offset 45, 55, 95, and the word located at offset 109, 110. | |
64b3db22 BM |
412 | * |
413 | * Note: The FADT revision value is unreliable. Only the length can be | |
414 | * trusted. | |
55f8f3cc | 415 | */ |
64b3db22 | 416 | if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) { |
55f8f3cc BM |
417 | acpi_gbl_FADT.preferred_profile = 0; |
418 | acpi_gbl_FADT.pstate_control = 0; | |
419 | acpi_gbl_FADT.cst_control = 0; | |
420 | acpi_gbl_FADT.boot_flags = 0; | |
421 | } | |
422 | ||
3e80acd1 JA |
423 | /* Update the local FADT table header length */ |
424 | ||
425 | acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt); | |
426 | ||
55f8f3cc | 427 | /* |
4b67a0e4 | 428 | * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X" |
429 | * generic address structures as necessary. Later code will always use | |
430 | * the 64-bit address structures. | |
31fbc073 BM |
431 | * |
432 | * March 2009: | |
433 | * We now always use the 32-bit address if it is valid (non-null). This | |
434 | * is not in accordance with the ACPI specification which states that | |
435 | * the 64-bit address supersedes the 32-bit version, but we do this for | |
436 | * compatibility with other ACPI implementations. Most notably, in the | |
437 | * case where both the 32 and 64 versions are non-null, we use the 32-bit | |
438 | * version. This is the only address that is guaranteed to have been | |
439 | * tested by the BIOS manufacturer. | |
95befdb3 | 440 | */ |
ea5d8ebc | 441 | for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { |
31fbc073 BM |
442 | address32 = *ACPI_ADD_PTR(u32, |
443 | &acpi_gbl_FADT, | |
444 | fadt_info_table[i].address32); | |
95befdb3 | 445 | |
31fbc073 BM |
446 | address64 = ACPI_ADD_PTR(struct acpi_generic_address, |
447 | &acpi_gbl_FADT, | |
448 | fadt_info_table[i].address64); | |
95befdb3 | 449 | |
31fbc073 BM |
450 | /* |
451 | * If both 32- and 64-bit addresses are valid (non-zero), | |
452 | * they must match. | |
453 | */ | |
454 | if (address64->address && address32 && | |
3b3ea775 BM |
455 | (address64->address != (u64)address32)) { |
456 | ACPI_BIOS_ERROR((AE_INFO, | |
457 | "32/64X address mismatch in FADT/%s: " | |
458 | "0x%8.8X/0x%8.8X%8.8X, using 32", | |
459 | fadt_info_table[i].name, address32, | |
460 | ACPI_FORMAT_UINT64(address64-> | |
461 | address))); | |
31fbc073 | 462 | } |
06f55419 | 463 | |
31fbc073 | 464 | /* Always use 32-bit address if it is valid (non-null) */ |
06f55419 | 465 | |
31fbc073 BM |
466 | if (address32) { |
467 | /* | |
468 | * Copy the 32-bit address to the 64-bit GAS structure. The | |
469 | * Space ID is always I/O for 32-bit legacy address fields | |
470 | */ | |
471 | acpi_tb_init_generic_address(address64, | |
06f55419 | 472 | ACPI_ADR_SPACE_SYSTEM_IO, |
95befdb3 BM |
473 | *ACPI_ADD_PTR(u8, |
474 | &acpi_gbl_FADT, | |
ea5d8ebc | 475 | fadt_info_table |
95befdb3 | 476 | [i].length), |
66be71ff BM |
477 | (u64) address32, |
478 | fadt_info_table[i].name); | |
95befdb3 BM |
479 | } |
480 | } | |
95befdb3 BM |
481 | } |
482 | ||
ec41f193 | 483 | /******************************************************************************* |
95befdb3 BM |
484 | * |
485 | * FUNCTION: acpi_tb_validate_fadt | |
486 | * | |
ba494bee | 487 | * PARAMETERS: table - Pointer to the FADT to be validated |
95befdb3 | 488 | * |
e56b638b | 489 | * RETURN: None |
95befdb3 | 490 | * |
ea5d8ebc BM |
491 | * DESCRIPTION: Validate various important fields within the FADT. If a problem |
492 | * is found, issue a message, but no status is returned. | |
493 | * Used by both the table manager and the disassembler. | |
494 | * | |
495 | * Possible additional checks: | |
496 | * (acpi_gbl_FADT.pm1_event_length >= 4) | |
497 | * (acpi_gbl_FADT.pm1_control_length >= 2) | |
498 | * (acpi_gbl_FADT.pm_timer_length >= 4) | |
499 | * Gpe block lengths must be multiple of 2 | |
95befdb3 BM |
500 | * |
501 | ******************************************************************************/ | |
502 | ||
71392844 | 503 | static void acpi_tb_validate_fadt(void) |
95befdb3 | 504 | { |
06f55419 | 505 | char *name; |
ea5d8ebc BM |
506 | struct acpi_generic_address *address64; |
507 | u8 length; | |
67a119f9 | 508 | u32 i; |
95befdb3 | 509 | |
06f55419 BM |
510 | /* |
511 | * Check for FACS and DSDT address mismatches. An address mismatch between | |
512 | * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and | |
513 | * DSDT/X_DSDT) would indicate the presence of two FACS or two DSDT tables. | |
514 | */ | |
515 | if (acpi_gbl_FADT.facs && | |
3b3ea775 BM |
516 | (acpi_gbl_FADT.Xfacs != (u64)acpi_gbl_FADT.facs)) { |
517 | ACPI_BIOS_WARNING((AE_INFO, | |
518 | "32/64X FACS address mismatch in FADT - " | |
519 | "0x%8.8X/0x%8.8X%8.8X, using 32", | |
520 | acpi_gbl_FADT.facs, | |
521 | ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xfacs))); | |
522 | ||
523 | acpi_gbl_FADT.Xfacs = (u64)acpi_gbl_FADT.facs; | |
06f55419 | 524 | } |
ea5d8ebc | 525 | |
06f55419 | 526 | if (acpi_gbl_FADT.dsdt && |
3b3ea775 BM |
527 | (acpi_gbl_FADT.Xdsdt != (u64)acpi_gbl_FADT.dsdt)) { |
528 | ACPI_BIOS_WARNING((AE_INFO, | |
529 | "32/64X DSDT address mismatch in FADT - " | |
530 | "0x%8.8X/0x%8.8X%8.8X, using 32", | |
531 | acpi_gbl_FADT.dsdt, | |
532 | ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xdsdt))); | |
533 | ||
534 | acpi_gbl_FADT.Xdsdt = (u64)acpi_gbl_FADT.dsdt; | |
06f55419 | 535 | } |
ea5d8ebc | 536 | |
22e5b40a BM |
537 | /* If Hardware Reduced flag is set, we are all done */ |
538 | ||
539 | if (acpi_gbl_reduced_hardware) { | |
540 | return; | |
541 | } | |
542 | ||
06f55419 | 543 | /* Examine all of the 64-bit extended address fields (X fields) */ |
ea5d8ebc | 544 | |
06f55419 BM |
545 | for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { |
546 | /* | |
e4c1ebfc BM |
547 | * Generate pointer to the 64-bit address, get the register |
548 | * length (width) and the register name | |
06f55419 BM |
549 | */ |
550 | address64 = ACPI_ADD_PTR(struct acpi_generic_address, | |
551 | &acpi_gbl_FADT, | |
4b67a0e4 | 552 | fadt_info_table[i].address64); |
71392844 BM |
553 | length = |
554 | *ACPI_ADD_PTR(u8, &acpi_gbl_FADT, | |
555 | fadt_info_table[i].length); | |
06f55419 BM |
556 | name = fadt_info_table[i].name; |
557 | ||
558 | /* | |
559 | * For each extended field, check for length mismatch between the | |
4b67a0e4 | 560 | * legacy length field and the corresponding 64-bit X length field. |
06f55419 | 561 | */ |
aab61b67 BM |
562 | if (address64->address && |
563 | (address64->bit_width != ACPI_MUL_8(length))) { | |
3b3ea775 BM |
564 | ACPI_BIOS_WARNING((AE_INFO, |
565 | "32/64X length mismatch in FADT/%s: %u/%u", | |
566 | name, ACPI_MUL_8(length), | |
567 | address64->bit_width)); | |
06f55419 | 568 | } |
ea5d8ebc BM |
569 | |
570 | if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) { | |
571 | /* | |
572 | * Field is required (Pm1a_event, Pm1a_control, pm_timer). | |
573 | * Both the address and length must be non-zero. | |
574 | */ | |
575 | if (!address64->address || !length) { | |
3b3ea775 BM |
576 | ACPI_BIOS_ERROR((AE_INFO, |
577 | "Required FADT field %s has zero address and/or length: " | |
578 | "0x%8.8X%8.8X/0x%X", | |
579 | name, | |
580 | ACPI_FORMAT_UINT64(address64-> | |
581 | address), | |
582 | length)); | |
ea5d8ebc BM |
583 | } |
584 | } else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) { | |
585 | /* | |
ba494bee | 586 | * Field is optional (Pm2_control, GPE0, GPE1) AND has its own |
ec41f193 BM |
587 | * length field. If present, both the address and length must |
588 | * be valid. | |
ea5d8ebc | 589 | */ |
ec41f193 BM |
590 | if ((address64->address && !length) || |
591 | (!address64->address && length)) { | |
3b3ea775 BM |
592 | ACPI_BIOS_WARNING((AE_INFO, |
593 | "Optional FADT field %s has zero address or length: " | |
594 | "0x%8.8X%8.8X/0x%X", | |
595 | name, | |
596 | ACPI_FORMAT_UINT64 | |
597 | (address64->address), | |
598 | length)); | |
ea5d8ebc BM |
599 | } |
600 | } | |
95befdb3 BM |
601 | } |
602 | } | |
531c633d | 603 | |
ec41f193 | 604 | /******************************************************************************* |
531c633d BM |
605 | * |
606 | * FUNCTION: acpi_tb_setup_fadt_registers | |
607 | * | |
608 | * PARAMETERS: None, uses acpi_gbl_FADT. | |
609 | * | |
610 | * RETURN: None | |
611 | * | |
612 | * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally, | |
613 | * force FADT register definitions to their default lengths. | |
614 | * | |
615 | ******************************************************************************/ | |
616 | ||
617 | static void acpi_tb_setup_fadt_registers(void) | |
618 | { | |
619 | struct acpi_generic_address *target64; | |
620 | struct acpi_generic_address *source64; | |
621 | u8 pm1_register_byte_width; | |
622 | u32 i; | |
623 | ||
624 | /* | |
625 | * Optionally check all register lengths against the default values and | |
626 | * update them if they are incorrect. | |
627 | */ | |
628 | if (acpi_gbl_use_default_register_widths) { | |
629 | for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { | |
630 | target64 = | |
631 | ACPI_ADD_PTR(struct acpi_generic_address, | |
632 | &acpi_gbl_FADT, | |
633 | fadt_info_table[i].address64); | |
634 | ||
635 | /* | |
636 | * If a valid register (Address != 0) and the (default_length > 0) | |
637 | * (Not a GPE register), then check the width against the default. | |
638 | */ | |
639 | if ((target64->address) && | |
640 | (fadt_info_table[i].default_length > 0) && | |
641 | (fadt_info_table[i].default_length != | |
642 | target64->bit_width)) { | |
3b3ea775 BM |
643 | ACPI_BIOS_WARNING((AE_INFO, |
644 | "Invalid length for FADT/%s: %u, using default %u", | |
645 | fadt_info_table[i].name, | |
646 | target64->bit_width, | |
647 | fadt_info_table[i]. | |
648 | default_length)); | |
531c633d BM |
649 | |
650 | /* Incorrect size, set width to the default */ | |
651 | ||
652 | target64->bit_width = | |
653 | fadt_info_table[i].default_length; | |
654 | } | |
655 | } | |
656 | } | |
657 | ||
658 | /* | |
659 | * Get the length of the individual PM1 registers (enable and status). | |
660 | * Each register is defined to be (event block length / 2). Extra divide | |
661 | * by 8 converts bits to bytes. | |
662 | */ | |
ec41f193 BM |
663 | pm1_register_byte_width = (u8) |
664 | ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width); | |
531c633d BM |
665 | |
666 | /* | |
667 | * Calculate separate GAS structs for the PM1x (A/B) Status and Enable | |
668 | * registers. These addresses do not appear (directly) in the FADT, so it | |
669 | * is useful to pre-calculate them from the PM1 Event Block definitions. | |
670 | * | |
671 | * The PM event blocks are split into two register blocks, first is the | |
672 | * PM Status Register block, followed immediately by the PM Enable | |
673 | * Register block. Each is of length (pm1_event_length/2) | |
674 | * | |
675 | * Note: The PM1A event block is required by the ACPI specification. | |
676 | * However, the PM1B event block is optional and is rarely, if ever, | |
677 | * used. | |
678 | */ | |
679 | ||
680 | for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) { | |
681 | source64 = | |
682 | ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, | |
683 | fadt_pm_info_table[i].source); | |
684 | ||
5e053e77 LM |
685 | if (source64->address) { |
686 | acpi_tb_init_generic_address(fadt_pm_info_table[i]. | |
687 | target, source64->space_id, | |
688 | pm1_register_byte_width, | |
689 | source64->address + | |
690 | (fadt_pm_info_table[i]. | |
691 | register_num * | |
66be71ff BM |
692 | pm1_register_byte_width), |
693 | "PmRegisters"); | |
5e053e77 | 694 | } |
531c633d BM |
695 | } |
696 | } |