1/****************************************************************************** 2 * 3 * Module Name: tbfadt - FADT table utilities 4 * 5 *****************************************************************************/ 6 7/* 8 * Copyright (C) 2000 - 2010, 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 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 u8 address64; 67 u8 address32; 68 u8 length; 69 u8 default_length; 70 u8 type; 71 72} acpi_fadt_info; 73 74#define ACPI_FADT_REQUIRED 1 75#define ACPI_FADT_SEPARATE_LENGTH 2 76 77static struct acpi_fadt_info fadt_info_table[] = { 78 {"Pm1aEventBlock", 79 ACPI_FADT_OFFSET(xpm1a_event_block), 80 ACPI_FADT_OFFSET(pm1a_event_block), 81 ACPI_FADT_OFFSET(pm1_event_length), 82 ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ 83 ACPI_FADT_REQUIRED}, 84 85 {"Pm1bEventBlock", 86 ACPI_FADT_OFFSET(xpm1b_event_block), 87 ACPI_FADT_OFFSET(pm1b_event_block), 88 ACPI_FADT_OFFSET(pm1_event_length), 89 ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ 90 0}, 91 92 {"Pm1aControlBlock", 93 ACPI_FADT_OFFSET(xpm1a_control_block), 94 ACPI_FADT_OFFSET(pm1a_control_block), 95 ACPI_FADT_OFFSET(pm1_control_length), 96 ACPI_PM1_REGISTER_WIDTH, 97 ACPI_FADT_REQUIRED}, 98 99 {"Pm1bControlBlock", 100 ACPI_FADT_OFFSET(xpm1b_control_block), 101 ACPI_FADT_OFFSET(pm1b_control_block), 102 ACPI_FADT_OFFSET(pm1_control_length), 103 ACPI_PM1_REGISTER_WIDTH, 104 0}, 105 106 {"Pm2ControlBlock", 107 ACPI_FADT_OFFSET(xpm2_control_block), 108 ACPI_FADT_OFFSET(pm2_control_block), 109 ACPI_FADT_OFFSET(pm2_control_length), 110 ACPI_PM2_REGISTER_WIDTH, 111 ACPI_FADT_SEPARATE_LENGTH}, 112 113 {"PmTimerBlock", 114 ACPI_FADT_OFFSET(xpm_timer_block), 115 ACPI_FADT_OFFSET(pm_timer_block), 116 ACPI_FADT_OFFSET(pm_timer_length), 117 ACPI_PM_TIMER_WIDTH, 118 ACPI_FADT_REQUIRED}, 119 120 {"Gpe0Block", 121 ACPI_FADT_OFFSET(xgpe0_block), 122 ACPI_FADT_OFFSET(gpe0_block), 123 ACPI_FADT_OFFSET(gpe0_block_length), 124 0, 125 ACPI_FADT_SEPARATE_LENGTH}, 126 127 {"Gpe1Block", 128 ACPI_FADT_OFFSET(xgpe1_block), 129 ACPI_FADT_OFFSET(gpe1_block), 130 ACPI_FADT_OFFSET(gpe1_block_length), 131 0, 132 ACPI_FADT_SEPARATE_LENGTH} 133}; 134 135#define ACPI_FADT_INFO_ENTRIES \ 136 (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info)) 137 138/* Table used to split Event Blocks into separate status/enable registers */ 139 140typedef struct acpi_fadt_pm_info { 141 struct acpi_generic_address *target; 142 u8 source; 143 u8 register_num; 144 145} acpi_fadt_pm_info; 146 147static struct acpi_fadt_pm_info fadt_pm_info_table[] = { 148 {&acpi_gbl_xpm1a_status, 149 ACPI_FADT_OFFSET(xpm1a_event_block), 150 0}, 151 152 {&acpi_gbl_xpm1a_enable, 153 ACPI_FADT_OFFSET(xpm1a_event_block), 154 1}, 155 156 {&acpi_gbl_xpm1b_status, 157 ACPI_FADT_OFFSET(xpm1b_event_block), 158 0}, 159 160 {&acpi_gbl_xpm1b_enable, 161 ACPI_FADT_OFFSET(xpm1b_event_block), 162 1} 163}; 164 165#define ACPI_FADT_PM_INFO_ENTRIES \ 166 (sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info)) 167 168/******************************************************************************* 169 * 170 * FUNCTION: acpi_tb_init_generic_address 171 * 172 * PARAMETERS: generic_address - GAS struct to be initialized 173 * byte_width - Width of this register 174 * Address - Address of the register 175 * 176 * RETURN: None 177 * 178 * DESCRIPTION: Initialize a Generic Address Structure (GAS) 179 * See the ACPI specification for a full description and 180 * definition of this structure. 181 * 182 ******************************************************************************/ 183 184static inline void 185acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, 186 u8 space_id, u8 byte_width, u64 address) 187{ 188 189 /* 190 * The 64-bit Address field is non-aligned in the byte packed 191 * GAS struct. 192 */ 193 ACPI_MOVE_64_TO_64(&generic_address->address, &address); 194 195 /* All other fields are byte-wide */ 196 197 generic_address->space_id = space_id; 198 generic_address->bit_width = (u8)ACPI_MUL_8(byte_width); 199 generic_address->bit_offset = 0; 200 generic_address->access_width = 0; /* Access width ANY */ 201} 202 203/******************************************************************************* 204 * 205 * FUNCTION: acpi_tb_parse_fadt 206 * 207 * PARAMETERS: table_index - Index for the FADT 208 * 209 * RETURN: None 210 * 211 * DESCRIPTION: Initialize the FADT, DSDT and FACS tables 212 * (FADT contains the addresses of the DSDT and FACS) 213 * 214 ******************************************************************************/ 215 216void acpi_tb_parse_fadt(u32 table_index) 217{ 218 u32 length; 219 struct acpi_table_header *table; 220 221 /* 222 * The FADT has multiple versions with different lengths, 223 * and it contains pointers to both the DSDT and FACS tables. 224 * 225 * Get a local copy of the FADT and convert it to a common format 226 * Map entire FADT, assumed to be smaller than one page. 227 */ 228 length = acpi_gbl_root_table_list.tables[table_index].length; 229 230 table = 231 acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index]. 232 address, length); 233 if (!table) { 234 return; 235 } 236 237 /* 238 * Validate the FADT checksum before we copy the table. Ignore 239 * checksum error as we want to try to get the DSDT and FACS. 240 */ 241 (void)acpi_tb_verify_checksum(table, length); 242 243 /* Create a local copy of the FADT in common ACPI 2.0+ format */ 244 245 acpi_tb_create_local_fadt(table, length); 246 247 /* All done with the real FADT, unmap it */ 248 249 acpi_os_unmap_memory(table, length); 250 251 /* Obtain the DSDT and FACS tables via their addresses within the FADT */ 252 253 acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt, 254 ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT); 255 256 acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs, 257 ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS); 258} 259 260/******************************************************************************* 261 * 262 * FUNCTION: acpi_tb_create_local_fadt 263 * 264 * PARAMETERS: Table - Pointer to BIOS FADT 265 * Length - Length of the table 266 * 267 * RETURN: None 268 * 269 * DESCRIPTION: Get a local copy of the FADT and convert it to a common format. 270 * Performs validation on some important FADT fields. 271 * 272 * NOTE: We create a local copy of the FADT regardless of the version. 273 * 274 ******************************************************************************/ 275 276void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length) 277{ 278 /* 279 * Check if the FADT is larger than the largest table that we expect 280 * (the ACPI 2.0/3.0 version). If so, truncate the table, and issue 281 * a warning. 282 */ 283 if (length > sizeof(struct acpi_table_fadt)) { 284 ACPI_WARNING((AE_INFO, 285 "FADT (revision %u) is longer than ACPI 2.0 version, " 286 "truncating length %u to %u", 287 table->revision, length, 288 (u32)sizeof(struct acpi_table_fadt))); 289 } 290 291 /* Clear the entire local FADT */ 292 293 ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt)); 294 295 /* Copy the original FADT, up to sizeof (struct acpi_table_fadt) */ 296 297 ACPI_MEMCPY(&acpi_gbl_FADT, table, 298 ACPI_MIN(length, sizeof(struct acpi_table_fadt))); 299 300 /* Convert the local copy of the FADT to the common internal format */ 301 302 acpi_tb_convert_fadt(); 303 304 /* Validate FADT values now, before we make any changes */ 305 306 acpi_tb_validate_fadt(); 307 308 /* Initialize the global ACPI register structures */ 309 310 acpi_tb_setup_fadt_registers(); 311} 312 313/******************************************************************************* 314 * 315 * FUNCTION: acpi_tb_convert_fadt 316 * 317 * PARAMETERS: None, uses acpi_gbl_FADT 318 * 319 * RETURN: None 320 * 321 * DESCRIPTION: Converts all versions of the FADT to a common internal format. 322 * Expand 32-bit addresses to 64-bit as necessary. 323 * 324 * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), 325 * and must contain a copy of the actual FADT. 326 * 327 * Notes on 64-bit register addresses: 328 * 329 * After this FADT conversion, later ACPICA code will only use the 64-bit "X" 330 * fields of the FADT for all ACPI register addresses. 331 * 332 * The 64-bit "X" fields are optional extensions to the original 32-bit FADT 333 * V1.0 fields. Even if they are present in the FADT, they are optional and 334 * are unused if the BIOS sets them to zero. Therefore, we must copy/expand 335 * 32-bit V1.0 fields if the corresponding X field is zero. 336 * 337 * For ACPI 1.0 FADTs, all 32-bit address fields are expanded to the 338 * corresponding "X" fields in the internal FADT. 339 * 340 * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded 341 * to the corresponding 64-bit X fields. For compatibility with other ACPI 342 * implementations, we ignore the 64-bit field if the 32-bit field is valid, 343 * regardless of whether the host OS is 32-bit or 64-bit. 344 * 345 ******************************************************************************/ 346 347static void acpi_tb_convert_fadt(void) 348{ 349 struct acpi_generic_address *address64; 350 u32 address32; 351 u32 i; 352 353 /* Update the local FADT table header length */ 354 355 acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt); 356 357 /* 358 * Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary. 359 * Later code will always use the X 64-bit field. Also, check for an 360 * address mismatch between the 32-bit and 64-bit address fields 361 * (FIRMWARE_CTRL/X_FIRMWARE_CTRL, DSDT/X_DSDT) which would indicate 362 * the presence of two FACS or two DSDT tables. 363 */ 364 if (!acpi_gbl_FADT.Xfacs) { 365 acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; 366 } else if (acpi_gbl_FADT.facs && 367 (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) { 368 ACPI_WARNING((AE_INFO, 369 "32/64 FACS address mismatch in FADT - two FACS tables!")); 370 } 371 372 if (!acpi_gbl_FADT.Xdsdt) { 373 acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; 374 } else if (acpi_gbl_FADT.dsdt && 375 (acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) { 376 ACPI_WARNING((AE_INFO, 377 "32/64 DSDT address mismatch in FADT - two DSDT tables!")); 378 } 379 380 if (acpi_gbl_FADT.header.revision < FADT2_REVISION_ID) { 381 acpi_gbl_FADT.preferred_profile = 0; 382 acpi_gbl_FADT.pstate_control = 0; 383 acpi_gbl_FADT.cst_control = 0; 384 acpi_gbl_FADT.boot_flags = 0; 385 } 386 387 /* 388 * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X" 389 * generic address structures as necessary. Later code will always use 390 * the 64-bit address structures. 391 * 392 * March 2009: 393 * We now always use the 32-bit address if it is valid (non-null). This 394 * is not in accordance with the ACPI specification which states that 395 * the 64-bit address supersedes the 32-bit version, but we do this for 396 * compatibility with other ACPI implementations. Most notably, in the 397 * case where both the 32 and 64 versions are non-null, we use the 32-bit 398 * version. This is the only address that is guaranteed to have been 399 * tested by the BIOS manufacturer. 400 */ 401 for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { 402 address32 = *ACPI_ADD_PTR(u32, 403 &acpi_gbl_FADT, 404 fadt_info_table[i].address32); 405 406 address64 = ACPI_ADD_PTR(struct acpi_generic_address, 407 &acpi_gbl_FADT, 408 fadt_info_table[i].address64); 409 410 /* 411 * If both 32- and 64-bit addresses are valid (non-zero), 412 * they must match. 413 */ 414 if (address64->address && address32 && 415 (address64->address != (u64) address32)) { 416 ACPI_ERROR((AE_INFO, 417 "32/64X address mismatch in %s: 0x%8.8X/0x%8.8X%8.8X, using 32", 418 fadt_info_table[i].name, address32, 419 ACPI_FORMAT_UINT64(address64->address))); 420 } 421 422 /* Always use 32-bit address if it is valid (non-null) */ 423 424 if (address32) { 425 /* 426 * Copy the 32-bit address to the 64-bit GAS structure. The 427 * Space ID is always I/O for 32-bit legacy address fields 428 */ 429 acpi_tb_init_generic_address(address64, 430 ACPI_ADR_SPACE_SYSTEM_IO, 431 *ACPI_ADD_PTR(u8, 432 &acpi_gbl_FADT, 433 fadt_info_table 434 [i].length), 435 (u64) address32); 436 } 437 } 438} 439 440/******************************************************************************* 441 * 442 * FUNCTION: acpi_tb_validate_fadt 443 * 444 * PARAMETERS: Table - Pointer to the FADT to be validated 445 * 446 * RETURN: None 447 * 448 * DESCRIPTION: Validate various important fields within the FADT. If a problem 449 * is found, issue a message, but no status is returned. 450 * Used by both the table manager and the disassembler. 451 * 452 * Possible additional checks: 453 * (acpi_gbl_FADT.pm1_event_length >= 4) 454 * (acpi_gbl_FADT.pm1_control_length >= 2) 455 * (acpi_gbl_FADT.pm_timer_length >= 4) 456 * Gpe block lengths must be multiple of 2 457 * 458 ******************************************************************************/ 459 460static void acpi_tb_validate_fadt(void) 461{ 462 char *name; 463 struct acpi_generic_address *address64; 464 u8 length; 465 u32 i; 466 467 /* 468 * Check for FACS and DSDT address mismatches. An address mismatch between 469 * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and 470 * DSDT/X_DSDT) would indicate the presence of two FACS or two DSDT tables. 471 */ 472 if (acpi_gbl_FADT.facs && 473 (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) { 474 ACPI_WARNING((AE_INFO, 475 "32/64X FACS address mismatch in FADT - " 476 "0x%8.8X/0x%8.8X%8.8X, using 32", 477 acpi_gbl_FADT.facs, 478 ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xfacs))); 479 480 acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; 481 } 482 483 if (acpi_gbl_FADT.dsdt && 484 (acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) { 485 ACPI_WARNING((AE_INFO, 486 "32/64X DSDT address mismatch in FADT - " 487 "0x%8.8X/0x%8.8X%8.8X, using 32", 488 acpi_gbl_FADT.dsdt, 489 ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xdsdt))); 490 491 acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; 492 } 493 494 /* Examine all of the 64-bit extended address fields (X fields) */ 495 496 for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { 497 /* 498 * Generate pointer to the 64-bit address, get the register 499 * length (width) and the register name 500 */ 501 address64 = ACPI_ADD_PTR(struct acpi_generic_address, 502 &acpi_gbl_FADT, 503 fadt_info_table[i].address64); 504 length = 505 *ACPI_ADD_PTR(u8, &acpi_gbl_FADT, 506 fadt_info_table[i].length); 507 name = fadt_info_table[i].name; 508 509 /* 510 * For each extended field, check for length mismatch between the 511 * legacy length field and the corresponding 64-bit X length field. 512 */ 513 if (address64->address && 514 (address64->bit_width != ACPI_MUL_8(length))) { 515 ACPI_WARNING((AE_INFO, 516 "32/64X length mismatch in %s: %u/%u", 517 name, ACPI_MUL_8(length), 518 address64->bit_width)); 519 } 520 521 if (fadt_info_table[i].type & ACPI_FADT_REQUIRED) { 522 /* 523 * Field is required (Pm1a_event, Pm1a_control, pm_timer). 524 * Both the address and length must be non-zero. 525 */ 526 if (!address64->address || !length) { 527 ACPI_ERROR((AE_INFO, 528 "Required field %s has zero address and/or length:" 529 " 0x%8.8X%8.8X/0x%X", 530 name, 531 ACPI_FORMAT_UINT64(address64-> 532 address), 533 length)); 534 } 535 } else if (fadt_info_table[i].type & ACPI_FADT_SEPARATE_LENGTH) { 536 /* 537 * Field is optional (PM2Control, GPE0, GPE1) AND has its own 538 * length field. If present, both the address and length must 539 * be valid. 540 */ 541 if ((address64->address && !length) || 542 (!address64->address && length)) { 543 ACPI_WARNING((AE_INFO, 544 "Optional field %s has zero address or length: " 545 "0x%8.8X%8.8X/0x%X", 546 name, 547 ACPI_FORMAT_UINT64(address64-> 548 address), 549 length)); 550 } 551 } 552 } 553} 554 555/******************************************************************************* 556 * 557 * FUNCTION: acpi_tb_setup_fadt_registers 558 * 559 * PARAMETERS: None, uses acpi_gbl_FADT. 560 * 561 * RETURN: None 562 * 563 * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally, 564 * force FADT register definitions to their default lengths. 565 * 566 ******************************************************************************/ 567 568static void acpi_tb_setup_fadt_registers(void) 569{ 570 struct acpi_generic_address *target64; 571 struct acpi_generic_address *source64; 572 u8 pm1_register_byte_width; 573 u32 i; 574 575 /* 576 * Optionally check all register lengths against the default values and 577 * update them if they are incorrect. 578 */ 579 if (acpi_gbl_use_default_register_widths) { 580 for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { 581 target64 = 582 ACPI_ADD_PTR(struct acpi_generic_address, 583 &acpi_gbl_FADT, 584 fadt_info_table[i].address64); 585 586 /* 587 * If a valid register (Address != 0) and the (default_length > 0) 588 * (Not a GPE register), then check the width against the default. 589 */ 590 if ((target64->address) && 591 (fadt_info_table[i].default_length > 0) && 592 (fadt_info_table[i].default_length != 593 target64->bit_width)) { 594 ACPI_WARNING((AE_INFO, 595 "Invalid length for %s: %u, using default %u", 596 fadt_info_table[i].name, 597 target64->bit_width, 598 fadt_info_table[i]. 599 default_length)); 600 601 /* Incorrect size, set width to the default */ 602 603 target64->bit_width = 604 fadt_info_table[i].default_length; 605 } 606 } 607 } 608 609 /* 610 * Get the length of the individual PM1 registers (enable and status). 611 * Each register is defined to be (event block length / 2). Extra divide 612 * by 8 converts bits to bytes. 613 */ 614 pm1_register_byte_width = (u8) 615 ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width); 616 617 /* 618 * Calculate separate GAS structs for the PM1x (A/B) Status and Enable 619 * registers. These addresses do not appear (directly) in the FADT, so it 620 * is useful to pre-calculate them from the PM1 Event Block definitions. 621 * 622 * The PM event blocks are split into two register blocks, first is the 623 * PM Status Register block, followed immediately by the PM Enable 624 * Register block. Each is of length (pm1_event_length/2) 625 * 626 * Note: The PM1A event block is required by the ACPI specification. 627 * However, the PM1B event block is optional and is rarely, if ever, 628 * used. 629 */ 630 631 for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) { 632 source64 = 633 ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, 634 fadt_pm_info_table[i].source); 635 636 if (source64->address) { 637 acpi_tb_init_generic_address(fadt_pm_info_table[i]. 638 target, source64->space_id, 639 pm1_register_byte_width, 640 source64->address + 641 (fadt_pm_info_table[i]. 642 register_num * 643 pm1_register_byte_width)); 644 } 645 } 646} 647