1/****************************************************************************** 2 * 3 * Module Name: tbfadt - FADT table utilities 4 * 5 *****************************************************************************/ 6 7/* 8 * Copyright (C) 2000 - 2012, Intel Corp. 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 "accommon.h" 46#include "actables.h" 47 48#define _COMPONENT ACPI_TABLES 49ACPI_MODULE_NAME("tbfadt") 50 51/* Local prototypes */ 52static ACPI_INLINE void 53acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, 54 u8 space_id, u8 byte_width, u64 address); 55 56static void acpi_tb_convert_fadt(void); 57 58static void acpi_tb_validate_fadt(void); 59 60static void acpi_tb_setup_fadt_registers(void); 61 62/* Table for conversion of FADT to common internal format and FADT validation */ 63 64typedef struct acpi_fadt_info { 65 char *name; 66 u16 address64; 67 u16 address32; 68 u16 length; 69 u8 default_length; 70 u8 type; 71 72} acpi_fadt_info; 73 74#define ACPI_FADT_OPTIONAL 0 75#define ACPI_FADT_REQUIRED 1 76#define ACPI_FADT_SEPARATE_LENGTH 2 77 78static struct acpi_fadt_info fadt_info_table[] = { 79 {"Pm1aEventBlock", 80 ACPI_FADT_OFFSET(xpm1a_event_block), 81 ACPI_FADT_OFFSET(pm1a_event_block), 82 ACPI_FADT_OFFSET(pm1_event_length), 83 ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ 84 ACPI_FADT_REQUIRED}, 85 86 {"Pm1bEventBlock", 87 ACPI_FADT_OFFSET(xpm1b_event_block), 88 ACPI_FADT_OFFSET(pm1b_event_block), 89 ACPI_FADT_OFFSET(pm1_event_length), 90 ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ 91 ACPI_FADT_OPTIONAL}, 92 93 {"Pm1aControlBlock", 94 ACPI_FADT_OFFSET(xpm1a_control_block), 95 ACPI_FADT_OFFSET(pm1a_control_block), 96 ACPI_FADT_OFFSET(pm1_control_length), 97 ACPI_PM1_REGISTER_WIDTH, 98 ACPI_FADT_REQUIRED}, 99 100 {"Pm1bControlBlock", 101 ACPI_FADT_OFFSET(xpm1b_control_block), 102 ACPI_FADT_OFFSET(pm1b_control_block), 103 ACPI_FADT_OFFSET(pm1_control_length), 104 ACPI_PM1_REGISTER_WIDTH, 105 ACPI_FADT_OPTIONAL}, 106 107 {"Pm2ControlBlock", 108 ACPI_FADT_OFFSET(xpm2_control_block), 109 ACPI_FADT_OFFSET(pm2_control_block), 110 ACPI_FADT_OFFSET(pm2_control_length), 111 ACPI_PM2_REGISTER_WIDTH, 112 ACPI_FADT_SEPARATE_LENGTH}, 113 114 {"PmTimerBlock", 115 ACPI_FADT_OFFSET(xpm_timer_block), 116 ACPI_FADT_OFFSET(pm_timer_block), 117 ACPI_FADT_OFFSET(pm_timer_length), 118 ACPI_PM_TIMER_WIDTH, 119 ACPI_FADT_REQUIRED}, 120 121 {"Gpe0Block", 122 ACPI_FADT_OFFSET(xgpe0_block), 123 ACPI_FADT_OFFSET(gpe0_block), 124 ACPI_FADT_OFFSET(gpe0_block_length), 125 0, 126 ACPI_FADT_SEPARATE_LENGTH}, 127 128 {"Gpe1Block", 129 ACPI_FADT_OFFSET(xgpe1_block), 130 ACPI_FADT_OFFSET(gpe1_block), 131 ACPI_FADT_OFFSET(gpe1_block_length), 132 0, 133 ACPI_FADT_SEPARATE_LENGTH} 134}; 135 136#define ACPI_FADT_INFO_ENTRIES \ 137 (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info)) 138 139/* Table used to split Event Blocks into separate status/enable registers */ 140 141typedef struct acpi_fadt_pm_info { 142 struct acpi_generic_address *target; 143 u16 source; 144 u8 register_num; 145 146} acpi_fadt_pm_info; 147 148static struct acpi_fadt_pm_info fadt_pm_info_table[] = { 149 {&acpi_gbl_xpm1a_status, 150 ACPI_FADT_OFFSET(xpm1a_event_block), 151 0}, 152 153 {&acpi_gbl_xpm1a_enable, 154 ACPI_FADT_OFFSET(xpm1a_event_block), 155 1}, 156 157 {&acpi_gbl_xpm1b_status, 158 ACPI_FADT_OFFSET(xpm1b_event_block), 159 0}, 160 161 {&acpi_gbl_xpm1b_enable, 162 ACPI_FADT_OFFSET(xpm1b_event_block), 163 1} 164}; 165 166#define ACPI_FADT_PM_INFO_ENTRIES \ 167 (sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info)) 168 169/******************************************************************************* 170 * 171 * FUNCTION: acpi_tb_init_generic_address 172 * 173 * PARAMETERS: generic_address - GAS struct to be initialized 174 * byte_width - Width of this register 175 * Address - Address of the register 176 * 177 * RETURN: None 178 * 179 * DESCRIPTION: Initialize a Generic Address Structure (GAS) 180 * See the ACPI specification for a full description and 181 * definition of this structure. 182 * 183 ******************************************************************************/ 184 185static ACPI_INLINE void 186acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, 187 u8 space_id, u8 byte_width, u64 address) 188{ 189 190 /* 191 * The 64-bit Address field is non-aligned in the byte packed 192 * GAS struct. 193 */ 194 ACPI_MOVE_64_TO_64(&generic_address->address, &address); 195 196 /* All other fields are byte-wide */ 197 198 generic_address->space_id = space_id; 199 generic_address->bit_width = (u8)ACPI_MUL_8(byte_width); 200 generic_address->bit_offset = 0; 201 generic_address->access_width = 0; /* Access width ANY */ 202} 203 204/******************************************************************************* 205 * 206 * FUNCTION: acpi_tb_parse_fadt 207 * 208 * PARAMETERS: table_index - Index for the FADT 209 * 210 * RETURN: None 211 * 212 * DESCRIPTION: Initialize the FADT, DSDT and FACS tables 213 * (FADT contains the addresses of the DSDT and FACS) 214 * 215 ******************************************************************************/ 216 217void acpi_tb_parse_fadt(u32 table_index) 218{ 219 u32 length; 220 struct acpi_table_header *table; 221 222 /* 223 * The FADT has multiple versions with different lengths, 224 * and it contains pointers to both the DSDT and FACS tables. 225 * 226 * Get a local copy of the FADT and convert it to a common format 227 * Map entire FADT, assumed to be smaller than one page. 228 */ 229 length = acpi_gbl_root_table_list.tables[table_index].length; 230 231 table = 232 acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index]. 233 address, length); 234 if (!table) { 235 return; 236 } 237 238 /* 239 * Validate the FADT checksum before we copy the table. Ignore 240 * checksum error as we want to try to get the DSDT and FACS. 241 */ 242 (void)acpi_tb_verify_checksum(table, length); 243 244 /* Create a local copy of the FADT in common ACPI 2.0+ format */ 245 246 acpi_tb_create_local_fadt(table, length); 247 248 /* All done with the real FADT, unmap it */ 249 250 acpi_os_unmap_memory(table, length); 251 252 /* Obtain the DSDT and FACS tables via their addresses within the FADT */ 253 254 acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt, 255 ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT); 256 257 /* If Hardware Reduced flag is set, there is no FACS */ 258 259 if (!acpi_gbl_reduced_hardware) { 260 acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT. 261 Xfacs, ACPI_SIG_FACS, 262 ACPI_TABLE_INDEX_FACS); 263 } 264} 265 266/******************************************************************************* 267 * 268 * FUNCTION: acpi_tb_create_local_fadt 269 * 270 * PARAMETERS: Table - Pointer to BIOS FADT 271 * Length - Length of the table 272 * 273 * RETURN: None 274 * 275 * DESCRIPTION: Get a local copy of the FADT and convert it to a common format. 276 * Performs validation on some important FADT fields. 277 * 278 * NOTE: We create a local copy of the FADT regardless of the version. 279 * 280 ******************************************************************************/ 281 282void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length) 283{ 284 /* 285 * Check if the FADT is larger than the largest table that we expect 286 * (the ACPI 5.0 version). If so, truncate the table, and issue 287 * a warning. 288 */ 289 if (length > sizeof(struct acpi_table_fadt)) { 290 ACPI_WARNING((AE_INFO, 291 "FADT (revision %u) is longer than ACPI 5.0 version, " 292 "truncating length %u to %u", 293 table->revision, length, 294 (u32)sizeof(struct acpi_table_fadt))); 295 } 296 297 /* Clear the entire local FADT */ 298 299 ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt)); 300 301 /* Copy the original FADT, up to sizeof (struct acpi_table_fadt) */ 302 303 ACPI_MEMCPY(&acpi_gbl_FADT, table, 304 ACPI_MIN(length, sizeof(struct acpi_table_fadt))); 305 306 /* Take a copy of the Hardware Reduced flag */ 307 308 acpi_gbl_reduced_hardware = FALSE; 309 if (acpi_gbl_FADT.flags & ACPI_FADT_HW_REDUCED) { 310 acpi_gbl_reduced_hardware = TRUE; 311 } 312 313 /* Convert the local copy of the FADT to the common internal format */ 314 315 acpi_tb_convert_fadt(); 316 317 /* Validate FADT values now, before we make any changes */ 318 319 acpi_tb_validate_fadt(); 320 321 /* Initialize the global ACPI register structures */ 322 323 acpi_tb_setup_fadt_registers(); 324} 325 326/******************************************************************************* 327 * 328 * FUNCTION: acpi_tb_convert_fadt 329 * 330 * PARAMETERS: None, uses acpi_gbl_FADT 331 * 332 * RETURN: None 333 * 334 * DESCRIPTION: Converts all versions of the FADT to a common internal format. 335 * Expand 32-bit addresses to 64-bit as necessary. 336 * 337 * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), 338 * and must contain a copy of the actual FADT. 339 * 340 * Notes on 64-bit register addresses: 341 * 342 * After this FADT conversion, later ACPICA code will only use the 64-bit "X" 343 * fields of the FADT for all ACPI register addresses. 344 * 345 * The 64-bit "X" fields are optional extensions to the original 32-bit FADT 346 * V1.0 fields. Even if they are present in the FADT, they are optional and 347 * are unused if the BIOS sets them to zero. Therefore, we must copy/expand 348 * 32-bit V1.0 fields if the corresponding X field is zero. 349 * 350 * For ACPI 1.0 FADTs, all 32-bit address fields are expanded to the 351 * corresponding "X" fields in the internal FADT. 352 * 353 * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded 354 * to the corresponding 64-bit X fields. For compatibility with other ACPI 355 * implementations, we ignore the 64-bit field if the 32-bit field is valid, 356 * regardless of whether the host OS is 32-bit or 64-bit. 357 * 358 ******************************************************************************/ 359 360static void acpi_tb_convert_fadt(void) 361{ 362 struct acpi_generic_address *address64; 363 u32 address32; 364 u32 i; 365 366 /* 367 * Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary. 368 * Later code will always use the X 64-bit field. Also, check for an 369 * address mismatch between the 32-bit and 64-bit address fields 370 * (FIRMWARE_CTRL/X_FIRMWARE_CTRL, DSDT/X_DSDT) which would indicate 371 * the presence of two FACS or two DSDT tables. 372 */ 373 if (!acpi_gbl_FADT.Xfacs) { 374 acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; 375 } else if (acpi_gbl_FADT.facs && 376 (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) { 377 ACPI_WARNING((AE_INFO, 378 "32/64 FACS address mismatch in FADT - two FACS tables!")); 379 } 380 381 if (!acpi_gbl_FADT.Xdsdt) { 382 acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; 383 } else if (acpi_gbl_FADT.dsdt && 384 (acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) { 385 ACPI_WARNING((AE_INFO, 386 "32/64 DSDT address mismatch in FADT - two DSDT tables!")); 387 } 388 389 /* 390 * For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which 391 * should be zero are indeed zero. This will workaround BIOSs that 392 * inadvertently place values in these fields. 393 * 394 * The ACPI 1.0 reserved fields that will be zeroed are the bytes located at 395 * offset 45, 55, 95, and the word located at offset 109, 110. 396 * 397 * Note: The FADT revision value is unreliable. Only the length can be 398 * trusted. 399 */ 400 if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) { 401 acpi_gbl_FADT.preferred_profile = 0; 402 acpi_gbl_FADT.pstate_control = 0; 403 acpi_gbl_FADT.cst_control = 0; 404 acpi_gbl_FADT.boot_flags = 0; 405 } 406 407 /* Update the local FADT table header length */ 408 409 acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt); 410 411 /* 412 * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X" 413 * generic address structures as necessary. Later code will always use 414 * the 64-bit address structures. 415 * 416 * March 2009: 417 * We now always use the 32-bit address if it is valid (non-null). This 418 * is not in accordance with the ACPI specification which states that 419 * the 64-bit address supersedes the 32-bit version, but we do this for 420 * compatibility with other ACPI implementations. Most notably, in the 421 * case where both the 32 and 64 versions are non-null, we use the 32-bit 422 * version. This is the only address that is guaranteed to have been 423 * tested by the BIOS manufacturer. 424 */ 425 for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { 426 address32 = *ACPI_ADD_PTR(u32, 427 &acpi_gbl_FADT, 428 fadt_info_table[i].address32); 429 430 address64 = ACPI_ADD_PTR(struct acpi_generic_address, 431 &acpi_gbl_FADT, 432 fadt_info_table[i].address64); 433 434 /* 435 * If both 32- and 64-bit addresses are valid (non-zero), 436 * they must match. 437 */ 438 if (address64->address && address32 && 439 (address64->address != (u64) address32)) { 440 ACPI_ERROR((AE_INFO, 441 "32/64X address mismatch in %s: 0x%8.8X/0x%8.8X%8.8X, using 32", 442 fadt_info_table[i].name, address32, 443 ACPI_FORMAT_UINT64(address64->address))); 444 } 445 446 /* Always use 32-bit address if it is valid (non-null) */ 447 448 if (address32) { 449 /* 450 * Copy the 32-bit address to the 64-bit GAS structure. The 451 * Space ID is always I/O for 32-bit legacy address fields 452 */ 453 acpi_tb_init_generic_address(address64, 454 ACPI_ADR_SPACE_SYSTEM_IO, 455 *ACPI_ADD_PTR(u8, 456 &acpi_gbl_FADT, 457 fadt_info_table 458 [i].length), 459 (u64) address32); 460 } 461 } 462} 463 464/******************************************************************************* 465 * 466 * FUNCTION: acpi_tb_validate_fadt 467 * 468 * PARAMETERS: Table - Pointer to the FADT to be validated 469 * 470 * RETURN: None 471 * 472 * DESCRIPTION: Validate various important fields within the FADT. If a problem 473 * is found, issue a message, but no status is returned. 474 * Used by both the table manager and the disassembler. 475 * 476 * Possible additional checks: 477 * (acpi_gbl_FADT.pm1_event_length >= 4) 478 * (acpi_gbl_FADT.pm1_control_length >= 2) 479 * (acpi_gbl_FADT.pm_timer_length >= 4) 480 * Gpe block lengths must be multiple of 2 481 * 482 ******************************************************************************/ 483 484static void acpi_tb_validate_fadt(void) 485{ 486 char *name; 487 struct acpi_generic_address *address64; 488 u8 length; 489 u32 i; 490 491 /* 492 * Check for FACS and DSDT address mismatches. An address mismatch between 493 * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and 494 * DSDT/X_DSDT) would indicate the presence of two FACS or two DSDT tables. 495 */ 496 if (acpi_gbl_FADT.facs && 497 (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) { 498 ACPI_WARNING((AE_INFO, 499 "32/64X FACS address mismatch in FADT - " 500 "0x%8.8X/0x%8.8X%8.8X, using 32", 501 acpi_gbl_FADT.facs, 502 ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xfacs))); 503 504 acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; 505 } 506 507 if (acpi_gbl_FADT.dsdt && 508 (acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) { 509 ACPI_WARNING((AE_INFO, 510 "32/64X DSDT address mismatch in FADT - " 511 "0x%8.8X/0x%8.8X%8.8X, using 32", 512 acpi_gbl_FADT.dsdt, 513 ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xdsdt))); 514 515 acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; 516 } 517 518 /* If Hardware Reduced flag is set, we are all done */ 519 520 if (acpi_gbl_reduced_hardware) { 521 return; 522 } 523 524 /* Examine all of the 64-bit extended address fields (X fields) */ 525 526 for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { 527 /* 528 * Generate pointer to the 64-bit address, get the register 529 * length (width) and the register name 530 */ 531 address64 = ACPI_ADD_PTR(struct acpi_generic_address, 532 &acpi_gbl_FADT, 533 fadt_info_table[i].address64); 534 length = 535 *ACPI_ADD_PTR(u8, &acpi_gbl_FADT, 536 fadt_info_table[i].length); 537 name = fadt_info_table[i].name; 538 539 /* 540 * For each extended field, check for length mismatch between the 541 * legacy length field and the corresponding 64-bit X length field. 542 */ 543 if (address64->address && 544 (address64->bit_width != ACPI_MUL_8(length))) { 545 ACPI_WARNING((AE_INFO, 546 "32/64X length mismatch in %s: %u/%u", 547 name, ACPI_MUL_8(length), 548 address64->bit_width)); 549 } 550 551 if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) { 552 /* 553 * Field is required (Pm1a_event, Pm1a_control, pm_timer). 554 * Both the address and length must be non-zero. 555 */ 556 if (!address64->address || !length) { 557 ACPI_ERROR((AE_INFO, 558 "Required field %s has zero address and/or length:" 559 " 0x%8.8X%8.8X/0x%X", 560 name, 561 ACPI_FORMAT_UINT64(address64-> 562 address), 563 length)); 564 } 565 } else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) { 566 /* 567 * Field is optional (PM2Control, GPE0, GPE1) AND has its own 568 * length field. If present, both the address and length must 569 * be valid. 570 */ 571 if ((address64->address && !length) || 572 (!address64->address && length)) { 573 ACPI_WARNING((AE_INFO, 574 "Optional field %s has zero address or length: " 575 "0x%8.8X%8.8X/0x%X", 576 name, 577 ACPI_FORMAT_UINT64(address64-> 578 address), 579 length)); 580 } 581 } 582 } 583} 584 585/******************************************************************************* 586 * 587 * FUNCTION: acpi_tb_setup_fadt_registers 588 * 589 * PARAMETERS: None, uses acpi_gbl_FADT. 590 * 591 * RETURN: None 592 * 593 * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally, 594 * force FADT register definitions to their default lengths. 595 * 596 ******************************************************************************/ 597 598static void acpi_tb_setup_fadt_registers(void) 599{ 600 struct acpi_generic_address *target64; 601 struct acpi_generic_address *source64; 602 u8 pm1_register_byte_width; 603 u32 i; 604 605 /* 606 * Optionally check all register lengths against the default values and 607 * update them if they are incorrect. 608 */ 609 if (acpi_gbl_use_default_register_widths) { 610 for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { 611 target64 = 612 ACPI_ADD_PTR(struct acpi_generic_address, 613 &acpi_gbl_FADT, 614 fadt_info_table[i].address64); 615 616 /* 617 * If a valid register (Address != 0) and the (default_length > 0) 618 * (Not a GPE register), then check the width against the default. 619 */ 620 if ((target64->address) && 621 (fadt_info_table[i].default_length > 0) && 622 (fadt_info_table[i].default_length != 623 target64->bit_width)) { 624 ACPI_WARNING((AE_INFO, 625 "Invalid length for %s: %u, using default %u", 626 fadt_info_table[i].name, 627 target64->bit_width, 628 fadt_info_table[i]. 629 default_length)); 630 631 /* Incorrect size, set width to the default */ 632 633 target64->bit_width = 634 fadt_info_table[i].default_length; 635 } 636 } 637 } 638 639 /* 640 * Get the length of the individual PM1 registers (enable and status). 641 * Each register is defined to be (event block length / 2). Extra divide 642 * by 8 converts bits to bytes. 643 */ 644 pm1_register_byte_width = (u8) 645 ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width); 646 647 /* 648 * Calculate separate GAS structs for the PM1x (A/B) Status and Enable 649 * registers. These addresses do not appear (directly) in the FADT, so it 650 * is useful to pre-calculate them from the PM1 Event Block definitions. 651 * 652 * The PM event blocks are split into two register blocks, first is the 653 * PM Status Register block, followed immediately by the PM Enable 654 * Register block. Each is of length (pm1_event_length/2) 655 * 656 * Note: The PM1A event block is required by the ACPI specification. 657 * However, the PM1B event block is optional and is rarely, if ever, 658 * used. 659 */ 660 661 for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) { 662 source64 = 663 ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, 664 fadt_pm_info_table[i].source); 665 666 if (source64->address) { 667 acpi_tb_init_generic_address(fadt_pm_info_table[i]. 668 target, source64->space_id, 669 pm1_register_byte_width, 670 source64->address + 671 (fadt_pm_info_table[i]. 672 register_num * 673 pm1_register_byte_width)); 674 } 675 } 676} 677