1 /****************************************************************************** 2 * 3 * Module Name: tbinstal - ACPI table installation and removal 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 "acnamesp.h" 47 #include "actables.h" 48 49 #define _COMPONENT ACPI_TABLES 50 ACPI_MODULE_NAME("tbinstal") 51 52 /****************************************************************************** 53 * 54 * FUNCTION: acpi_tb_verify_table 55 * 56 * PARAMETERS: table_desc - table 57 * 58 * RETURN: Status 59 * 60 * DESCRIPTION: this function is called to verify and map table 61 * 62 *****************************************************************************/ 63 acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc) 64 { 65 acpi_status status = AE_OK; 66 67 ACPI_FUNCTION_TRACE(tb_verify_table); 68 69 /* Map the table if necessary */ 70 71 if (!table_desc->pointer) { 72 if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) == 73 ACPI_TABLE_ORIGIN_MAPPED) { 74 table_desc->pointer = 75 acpi_os_map_memory(table_desc->address, 76 table_desc->length); 77 } 78 if (!table_desc->pointer) { 79 return_ACPI_STATUS(AE_NO_MEMORY); 80 } 81 } 82 83 /* FACS is the odd table, has no standard ACPI header and no checksum */ 84 85 if (!ACPI_COMPARE_NAME(&table_desc->signature, ACPI_SIG_FACS)) { 86 87 /* Always calculate checksum, ignore bad checksum if requested */ 88 89 status = 90 acpi_tb_verify_checksum(table_desc->pointer, 91 table_desc->length); 92 } 93 94 return_ACPI_STATUS(status); 95 } 96 97 /******************************************************************************* 98 * 99 * FUNCTION: acpi_tb_add_table 100 * 101 * PARAMETERS: table_desc - Table descriptor 102 * table_index - Where the table index is returned 103 * 104 * RETURN: Status 105 * 106 * DESCRIPTION: This function is called to add an ACPI table. It is used to 107 * dynamically load tables via the Load and load_table AML 108 * operators. 109 * 110 ******************************************************************************/ 111 112 acpi_status 113 acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index) 114 { 115 u32 i; 116 acpi_status status = AE_OK; 117 118 ACPI_FUNCTION_TRACE(tb_add_table); 119 120 if (!table_desc->pointer) { 121 status = acpi_tb_verify_table(table_desc); 122 if (ACPI_FAILURE(status) || !table_desc->pointer) { 123 return_ACPI_STATUS(status); 124 } 125 } 126 127 /* 128 * Validate the incoming table signature. 129 * 130 * 1) Originally, we checked the table signature for "SSDT" or "PSDT". 131 * 2) We added support for OEMx tables, signature "OEM". 132 * 3) Valid tables were encountered with a null signature, so we just 133 * gave up on validating the signature, (05/2008). 134 * 4) We encountered non-AML tables such as the MADT, which caused 135 * interpreter errors and kernel faults. So now, we once again allow 136 * only "SSDT", "OEMx", and now, also a null signature. (05/2011). 137 */ 138 if ((table_desc->pointer->signature[0] != 0x00) && 139 (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT)) 140 && (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) { 141 ACPI_ERROR((AE_INFO, 142 "Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx", 143 acpi_ut_valid_acpi_name(*(u32 *)table_desc-> 144 pointer-> 145 signature) ? table_desc-> 146 pointer->signature : "????", 147 *(u32 *)table_desc->pointer->signature)); 148 149 return_ACPI_STATUS(AE_BAD_SIGNATURE); 150 } 151 152 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 153 154 /* Check if table is already registered */ 155 156 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { 157 if (!acpi_gbl_root_table_list.tables[i].pointer) { 158 status = 159 acpi_tb_verify_table(&acpi_gbl_root_table_list. 160 tables[i]); 161 if (ACPI_FAILURE(status) 162 || !acpi_gbl_root_table_list.tables[i].pointer) { 163 continue; 164 } 165 } 166 167 /* 168 * Check for a table match on the entire table length, 169 * not just the header. 170 */ 171 if (table_desc->length != 172 acpi_gbl_root_table_list.tables[i].length) { 173 continue; 174 } 175 176 if (ACPI_MEMCMP(table_desc->pointer, 177 acpi_gbl_root_table_list.tables[i].pointer, 178 acpi_gbl_root_table_list.tables[i].length)) { 179 continue; 180 } 181 182 /* 183 * Note: the current mechanism does not unregister a table if it is 184 * dynamically unloaded. The related namespace entries are deleted, 185 * but the table remains in the root table list. 186 * 187 * The assumption here is that the number of different tables that 188 * will be loaded is actually small, and there is minimal overhead 189 * in just keeping the table in case it is needed again. 190 * 191 * If this assumption changes in the future (perhaps on large 192 * machines with many table load/unload operations), tables will 193 * need to be unregistered when they are unloaded, and slots in the 194 * root table list should be reused when empty. 195 */ 196 197 /* 198 * Table is already registered. 199 * We can delete the table that was passed as a parameter. 200 */ 201 acpi_tb_delete_table(table_desc); 202 *table_index = i; 203 204 if (acpi_gbl_root_table_list.tables[i]. 205 flags & ACPI_TABLE_IS_LOADED) { 206 207 /* Table is still loaded, this is an error */ 208 209 status = AE_ALREADY_EXISTS; 210 goto release; 211 } else { 212 /* Table was unloaded, allow it to be reloaded */ 213 214 table_desc->pointer = 215 acpi_gbl_root_table_list.tables[i].pointer; 216 table_desc->address = 217 acpi_gbl_root_table_list.tables[i].address; 218 status = AE_OK; 219 goto print_header; 220 } 221 } 222 223 /* 224 * ACPI Table Override: 225 * Allow the host to override dynamically loaded tables. 226 * NOTE: the table is fully mapped at this point, and the mapping will 227 * be deleted by tb_table_override if the table is actually overridden. 228 */ 229 (void)acpi_tb_table_override(table_desc->pointer, table_desc); 230 231 /* Add the table to the global root table list */ 232 233 status = acpi_tb_store_table(table_desc->address, table_desc->pointer, 234 table_desc->length, table_desc->flags, 235 table_index); 236 if (ACPI_FAILURE(status)) { 237 goto release; 238 } 239 240 print_header: 241 acpi_tb_print_table_header(table_desc->address, table_desc->pointer); 242 243 release: 244 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 245 return_ACPI_STATUS(status); 246 } 247 248 /******************************************************************************* 249 * 250 * FUNCTION: acpi_tb_table_override 251 * 252 * PARAMETERS: table_header - Header for the original table 253 * table_desc - Table descriptor initialized for the 254 * original table. May or may not be mapped. 255 * 256 * RETURN: Pointer to the entire new table. NULL if table not overridden. 257 * If overridden, installs the new table within the input table 258 * descriptor. 259 * 260 * DESCRIPTION: Attempt table override by calling the OSL override functions. 261 * Note: If the table is overridden, then the entire new table 262 * is mapped and returned by this function. 263 * 264 ******************************************************************************/ 265 266 struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header 267 *table_header, 268 struct acpi_table_desc 269 *table_desc) 270 { 271 acpi_status status; 272 struct acpi_table_header *new_table = NULL; 273 acpi_physical_address new_address = 0; 274 u32 new_table_length = 0; 275 u8 new_flags; 276 char *override_type; 277 278 /* (1) Attempt logical override (returns a logical address) */ 279 280 status = acpi_os_table_override(table_header, &new_table); 281 if (ACPI_SUCCESS(status) && new_table) { 282 new_address = ACPI_PTR_TO_PHYSADDR(new_table); 283 new_table_length = new_table->length; 284 new_flags = ACPI_TABLE_ORIGIN_OVERRIDE; 285 override_type = "Logical"; 286 goto finish_override; 287 } 288 289 /* (2) Attempt physical override (returns a physical address) */ 290 291 status = acpi_os_physical_table_override(table_header, 292 &new_address, 293 &new_table_length); 294 if (ACPI_SUCCESS(status) && new_address && new_table_length) { 295 296 /* Map the entire new table */ 297 298 new_table = acpi_os_map_memory(new_address, new_table_length); 299 if (!new_table) { 300 ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, 301 "%4.4s %p Attempted physical table override failed", 302 table_header->signature, 303 ACPI_CAST_PTR(void, 304 table_desc->address))); 305 return (NULL); 306 } 307 308 override_type = "Physical"; 309 new_flags = ACPI_TABLE_ORIGIN_MAPPED; 310 goto finish_override; 311 } 312 313 return (NULL); /* There was no override */ 314 315 finish_override: 316 317 ACPI_INFO((AE_INFO, 318 "%4.4s %p %s table override, new table: %p", 319 table_header->signature, 320 ACPI_CAST_PTR(void, table_desc->address), 321 override_type, new_table)); 322 323 /* We can now unmap/delete the original table (if fully mapped) */ 324 325 acpi_tb_delete_table(table_desc); 326 327 /* Setup descriptor for the new table */ 328 329 table_desc->address = new_address; 330 table_desc->pointer = new_table; 331 table_desc->length = new_table_length; 332 table_desc->flags = new_flags; 333 334 return (new_table); 335 } 336 337 /******************************************************************************* 338 * 339 * FUNCTION: acpi_tb_resize_root_table_list 340 * 341 * PARAMETERS: None 342 * 343 * RETURN: Status 344 * 345 * DESCRIPTION: Expand the size of global table array 346 * 347 ******************************************************************************/ 348 349 acpi_status acpi_tb_resize_root_table_list(void) 350 { 351 struct acpi_table_desc *tables; 352 353 ACPI_FUNCTION_TRACE(tb_resize_root_table_list); 354 355 /* allow_resize flag is a parameter to acpi_initialize_tables */ 356 357 if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) { 358 ACPI_ERROR((AE_INFO, 359 "Resize of Root Table Array is not allowed")); 360 return_ACPI_STATUS(AE_SUPPORT); 361 } 362 363 /* Increase the Table Array size */ 364 365 tables = ACPI_ALLOCATE_ZEROED(((acpi_size) acpi_gbl_root_table_list. 366 max_table_count + 367 ACPI_ROOT_TABLE_SIZE_INCREMENT) * 368 sizeof(struct acpi_table_desc)); 369 if (!tables) { 370 ACPI_ERROR((AE_INFO, 371 "Could not allocate new root table array")); 372 return_ACPI_STATUS(AE_NO_MEMORY); 373 } 374 375 /* Copy and free the previous table array */ 376 377 if (acpi_gbl_root_table_list.tables) { 378 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, 379 (acpi_size) acpi_gbl_root_table_list. 380 max_table_count * sizeof(struct acpi_table_desc)); 381 382 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { 383 ACPI_FREE(acpi_gbl_root_table_list.tables); 384 } 385 } 386 387 acpi_gbl_root_table_list.tables = tables; 388 acpi_gbl_root_table_list.max_table_count += 389 ACPI_ROOT_TABLE_SIZE_INCREMENT; 390 acpi_gbl_root_table_list.flags |= (u8)ACPI_ROOT_ORIGIN_ALLOCATED; 391 392 return_ACPI_STATUS(AE_OK); 393 } 394 395 /******************************************************************************* 396 * 397 * FUNCTION: acpi_tb_store_table 398 * 399 * PARAMETERS: Address - Table address 400 * Table - Table header 401 * Length - Table length 402 * Flags - flags 403 * 404 * RETURN: Status and table index. 405 * 406 * DESCRIPTION: Add an ACPI table to the global table list 407 * 408 ******************************************************************************/ 409 410 acpi_status 411 acpi_tb_store_table(acpi_physical_address address, 412 struct acpi_table_header *table, 413 u32 length, u8 flags, u32 *table_index) 414 { 415 acpi_status status; 416 struct acpi_table_desc *new_table; 417 418 /* Ensure that there is room for the table in the Root Table List */ 419 420 if (acpi_gbl_root_table_list.current_table_count >= 421 acpi_gbl_root_table_list.max_table_count) { 422 status = acpi_tb_resize_root_table_list(); 423 if (ACPI_FAILURE(status)) { 424 return (status); 425 } 426 } 427 428 new_table = 429 &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list. 430 current_table_count]; 431 432 /* Initialize added table */ 433 434 new_table->address = address; 435 new_table->pointer = table; 436 new_table->length = length; 437 new_table->owner_id = 0; 438 new_table->flags = flags; 439 440 ACPI_MOVE_32_TO_32(&new_table->signature, table->signature); 441 442 *table_index = acpi_gbl_root_table_list.current_table_count; 443 acpi_gbl_root_table_list.current_table_count++; 444 return (AE_OK); 445 } 446 447 /******************************************************************************* 448 * 449 * FUNCTION: acpi_tb_delete_table 450 * 451 * PARAMETERS: table_index - Table index 452 * 453 * RETURN: None 454 * 455 * DESCRIPTION: Delete one internal ACPI table 456 * 457 ******************************************************************************/ 458 459 void acpi_tb_delete_table(struct acpi_table_desc *table_desc) 460 { 461 /* Table must be mapped or allocated */ 462 if (!table_desc->pointer) { 463 return; 464 } 465 switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) { 466 case ACPI_TABLE_ORIGIN_MAPPED: 467 acpi_os_unmap_memory(table_desc->pointer, table_desc->length); 468 break; 469 case ACPI_TABLE_ORIGIN_ALLOCATED: 470 ACPI_FREE(table_desc->pointer); 471 break; 472 473 /* Not mapped or allocated, there is nothing we can do */ 474 475 default: 476 return; 477 } 478 479 table_desc->pointer = NULL; 480 } 481 482 /******************************************************************************* 483 * 484 * FUNCTION: acpi_tb_terminate 485 * 486 * PARAMETERS: None 487 * 488 * RETURN: None 489 * 490 * DESCRIPTION: Delete all internal ACPI tables 491 * 492 ******************************************************************************/ 493 494 void acpi_tb_terminate(void) 495 { 496 u32 i; 497 498 ACPI_FUNCTION_TRACE(tb_terminate); 499 500 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 501 502 /* Delete the individual tables */ 503 504 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) { 505 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]); 506 } 507 508 /* 509 * Delete the root table array if allocated locally. Array cannot be 510 * mapped, so we don't need to check for that flag. 511 */ 512 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { 513 ACPI_FREE(acpi_gbl_root_table_list.tables); 514 } 515 516 acpi_gbl_root_table_list.tables = NULL; 517 acpi_gbl_root_table_list.flags = 0; 518 acpi_gbl_root_table_list.current_table_count = 0; 519 520 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n")); 521 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 522 } 523 524 /******************************************************************************* 525 * 526 * FUNCTION: acpi_tb_delete_namespace_by_owner 527 * 528 * PARAMETERS: table_index - Table index 529 * 530 * RETURN: Status 531 * 532 * DESCRIPTION: Delete all namespace objects created when this table was loaded. 533 * 534 ******************************************************************************/ 535 536 acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index) 537 { 538 acpi_owner_id owner_id; 539 acpi_status status; 540 541 ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner); 542 543 status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 544 if (ACPI_FAILURE(status)) { 545 return_ACPI_STATUS(status); 546 } 547 548 if (table_index >= acpi_gbl_root_table_list.current_table_count) { 549 550 /* The table index does not exist */ 551 552 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 553 return_ACPI_STATUS(AE_NOT_EXIST); 554 } 555 556 /* Get the owner ID for this table, used to delete namespace nodes */ 557 558 owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id; 559 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 560 561 /* 562 * Need to acquire the namespace writer lock to prevent interference 563 * with any concurrent namespace walks. The interpreter must be 564 * released during the deletion since the acquisition of the deletion 565 * lock may block, and also since the execution of a namespace walk 566 * must be allowed to use the interpreter. 567 */ 568 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER); 569 status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock); 570 571 acpi_ns_delete_namespace_by_owner(owner_id); 572 if (ACPI_FAILURE(status)) { 573 return_ACPI_STATUS(status); 574 } 575 576 acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock); 577 578 status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER); 579 return_ACPI_STATUS(status); 580 } 581 582 /******************************************************************************* 583 * 584 * FUNCTION: acpi_tb_allocate_owner_id 585 * 586 * PARAMETERS: table_index - Table index 587 * 588 * RETURN: Status 589 * 590 * DESCRIPTION: Allocates owner_id in table_desc 591 * 592 ******************************************************************************/ 593 594 acpi_status acpi_tb_allocate_owner_id(u32 table_index) 595 { 596 acpi_status status = AE_BAD_PARAMETER; 597 598 ACPI_FUNCTION_TRACE(tb_allocate_owner_id); 599 600 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 601 if (table_index < acpi_gbl_root_table_list.current_table_count) { 602 status = acpi_ut_allocate_owner_id 603 (&(acpi_gbl_root_table_list.tables[table_index].owner_id)); 604 } 605 606 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 607 return_ACPI_STATUS(status); 608 } 609 610 /******************************************************************************* 611 * 612 * FUNCTION: acpi_tb_release_owner_id 613 * 614 * PARAMETERS: table_index - Table index 615 * 616 * RETURN: Status 617 * 618 * DESCRIPTION: Releases owner_id in table_desc 619 * 620 ******************************************************************************/ 621 622 acpi_status acpi_tb_release_owner_id(u32 table_index) 623 { 624 acpi_status status = AE_BAD_PARAMETER; 625 626 ACPI_FUNCTION_TRACE(tb_release_owner_id); 627 628 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 629 if (table_index < acpi_gbl_root_table_list.current_table_count) { 630 acpi_ut_release_owner_id(& 631 (acpi_gbl_root_table_list. 632 tables[table_index].owner_id)); 633 status = AE_OK; 634 } 635 636 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 637 return_ACPI_STATUS(status); 638 } 639 640 /******************************************************************************* 641 * 642 * FUNCTION: acpi_tb_get_owner_id 643 * 644 * PARAMETERS: table_index - Table index 645 * owner_id - Where the table owner_id is returned 646 * 647 * RETURN: Status 648 * 649 * DESCRIPTION: returns owner_id for the ACPI table 650 * 651 ******************************************************************************/ 652 653 acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id) 654 { 655 acpi_status status = AE_BAD_PARAMETER; 656 657 ACPI_FUNCTION_TRACE(tb_get_owner_id); 658 659 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 660 if (table_index < acpi_gbl_root_table_list.current_table_count) { 661 *owner_id = 662 acpi_gbl_root_table_list.tables[table_index].owner_id; 663 status = AE_OK; 664 } 665 666 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 667 return_ACPI_STATUS(status); 668 } 669 670 /******************************************************************************* 671 * 672 * FUNCTION: acpi_tb_is_table_loaded 673 * 674 * PARAMETERS: table_index - Table index 675 * 676 * RETURN: Table Loaded Flag 677 * 678 ******************************************************************************/ 679 680 u8 acpi_tb_is_table_loaded(u32 table_index) 681 { 682 u8 is_loaded = FALSE; 683 684 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 685 if (table_index < acpi_gbl_root_table_list.current_table_count) { 686 is_loaded = (u8) 687 (acpi_gbl_root_table_list.tables[table_index].flags & 688 ACPI_TABLE_IS_LOADED); 689 } 690 691 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 692 return (is_loaded); 693 } 694 695 /******************************************************************************* 696 * 697 * FUNCTION: acpi_tb_set_table_loaded_flag 698 * 699 * PARAMETERS: table_index - Table index 700 * is_loaded - TRUE if table is loaded, FALSE otherwise 701 * 702 * RETURN: None 703 * 704 * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE. 705 * 706 ******************************************************************************/ 707 708 void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded) 709 { 710 711 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 712 if (table_index < acpi_gbl_root_table_list.current_table_count) { 713 if (is_loaded) { 714 acpi_gbl_root_table_list.tables[table_index].flags |= 715 ACPI_TABLE_IS_LOADED; 716 } else { 717 acpi_gbl_root_table_list.tables[table_index].flags &= 718 ~ACPI_TABLE_IS_LOADED; 719 } 720 } 721 722 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 723 } 724