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_BIOS_ERROR((AE_INFO, 142 "Table has invalid signature [%4.4s] (0x%8.8X), " 143 "must be SSDT or OEMx", 144 acpi_ut_valid_acpi_name(*(u32 *)table_desc-> 145 pointer-> 146 signature) ? 147 table_desc->pointer->signature : "????", 148 *(u32 *)table_desc->pointer->signature)); 149 150 return_ACPI_STATUS(AE_BAD_SIGNATURE); 151 } 152 153 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 154 155 /* Check if table is already registered */ 156 157 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) { 158 if (!acpi_gbl_root_table_list.tables[i].pointer) { 159 status = 160 acpi_tb_verify_table(&acpi_gbl_root_table_list. 161 tables[i]); 162 if (ACPI_FAILURE(status) 163 || !acpi_gbl_root_table_list.tables[i].pointer) { 164 continue; 165 } 166 } 167 168 /* 169 * Check for a table match on the entire table length, 170 * not just the header. 171 */ 172 if (table_desc->length != 173 acpi_gbl_root_table_list.tables[i].length) { 174 continue; 175 } 176 177 if (ACPI_MEMCMP(table_desc->pointer, 178 acpi_gbl_root_table_list.tables[i].pointer, 179 acpi_gbl_root_table_list.tables[i].length)) { 180 continue; 181 } 182 183 /* 184 * Note: the current mechanism does not unregister a table if it is 185 * dynamically unloaded. The related namespace entries are deleted, 186 * but the table remains in the root table list. 187 * 188 * The assumption here is that the number of different tables that 189 * will be loaded is actually small, and there is minimal overhead 190 * in just keeping the table in case it is needed again. 191 * 192 * If this assumption changes in the future (perhaps on large 193 * machines with many table load/unload operations), tables will 194 * need to be unregistered when they are unloaded, and slots in the 195 * root table list should be reused when empty. 196 */ 197 198 /* 199 * Table is already registered. 200 * We can delete the table that was passed as a parameter. 201 */ 202 acpi_tb_delete_table(table_desc); 203 *table_index = i; 204 205 if (acpi_gbl_root_table_list.tables[i]. 206 flags & ACPI_TABLE_IS_LOADED) { 207 208 /* Table is still loaded, this is an error */ 209 210 status = AE_ALREADY_EXISTS; 211 goto release; 212 } else { 213 /* Table was unloaded, allow it to be reloaded */ 214 215 table_desc->pointer = 216 acpi_gbl_root_table_list.tables[i].pointer; 217 table_desc->address = 218 acpi_gbl_root_table_list.tables[i].address; 219 status = AE_OK; 220 goto print_header; 221 } 222 } 223 224 /* 225 * ACPI Table Override: 226 * Allow the host to override dynamically loaded tables. 227 * NOTE: the table is fully mapped at this point, and the mapping will 228 * be deleted by tb_table_override if the table is actually overridden. 229 */ 230 (void)acpi_tb_table_override(table_desc->pointer, table_desc); 231 232 /* Add the table to the global root table list */ 233 234 status = acpi_tb_store_table(table_desc->address, table_desc->pointer, 235 table_desc->length, table_desc->flags, 236 table_index); 237 if (ACPI_FAILURE(status)) { 238 goto release; 239 } 240 241 print_header: 242 acpi_tb_print_table_header(table_desc->address, table_desc->pointer); 243 244 release: 245 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 246 return_ACPI_STATUS(status); 247 } 248 249 /******************************************************************************* 250 * 251 * FUNCTION: acpi_tb_table_override 252 * 253 * PARAMETERS: table_header - Header for the original table 254 * table_desc - Table descriptor initialized for the 255 * original table. May or may not be mapped. 256 * 257 * RETURN: Pointer to the entire new table. NULL if table not overridden. 258 * If overridden, installs the new table within the input table 259 * descriptor. 260 * 261 * DESCRIPTION: Attempt table override by calling the OSL override functions. 262 * Note: If the table is overridden, then the entire new table 263 * is mapped and returned by this function. 264 * 265 ******************************************************************************/ 266 267 struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header 268 *table_header, 269 struct acpi_table_desc 270 *table_desc) 271 { 272 acpi_status status; 273 struct acpi_table_header *new_table = NULL; 274 acpi_physical_address new_address = 0; 275 u32 new_table_length = 0; 276 u8 new_flags; 277 char *override_type; 278 279 /* (1) Attempt logical override (returns a logical address) */ 280 281 status = acpi_os_table_override(table_header, &new_table); 282 if (ACPI_SUCCESS(status) && new_table) { 283 new_address = ACPI_PTR_TO_PHYSADDR(new_table); 284 new_table_length = new_table->length; 285 new_flags = ACPI_TABLE_ORIGIN_OVERRIDE; 286 override_type = "Logical"; 287 goto finish_override; 288 } 289 290 /* (2) Attempt physical override (returns a physical address) */ 291 292 status = acpi_os_physical_table_override(table_header, 293 &new_address, 294 &new_table_length); 295 if (ACPI_SUCCESS(status) && new_address && new_table_length) { 296 297 /* Map the entire new table */ 298 299 new_table = acpi_os_map_memory(new_address, new_table_length); 300 if (!new_table) { 301 ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, 302 "%4.4s %p Attempted physical table override failed", 303 table_header->signature, 304 ACPI_CAST_PTR(void, 305 table_desc->address))); 306 return (NULL); 307 } 308 309 override_type = "Physical"; 310 new_flags = ACPI_TABLE_ORIGIN_MAPPED; 311 goto finish_override; 312 } 313 314 return (NULL); /* There was no override */ 315 316 finish_override: 317 318 ACPI_INFO((AE_INFO, 319 "%4.4s %p %s table override, new table: %p", 320 table_header->signature, 321 ACPI_CAST_PTR(void, table_desc->address), 322 override_type, new_table)); 323 324 /* We can now unmap/delete the original table (if fully mapped) */ 325 326 acpi_tb_delete_table(table_desc); 327 328 /* Setup descriptor for the new table */ 329 330 table_desc->address = new_address; 331 table_desc->pointer = new_table; 332 table_desc->length = new_table_length; 333 table_desc->flags = new_flags; 334 335 return (new_table); 336 } 337 338 /******************************************************************************* 339 * 340 * FUNCTION: acpi_tb_resize_root_table_list 341 * 342 * PARAMETERS: None 343 * 344 * RETURN: Status 345 * 346 * DESCRIPTION: Expand the size of global table array 347 * 348 ******************************************************************************/ 349 350 acpi_status acpi_tb_resize_root_table_list(void) 351 { 352 struct acpi_table_desc *tables; 353 354 ACPI_FUNCTION_TRACE(tb_resize_root_table_list); 355 356 /* allow_resize flag is a parameter to acpi_initialize_tables */ 357 358 if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) { 359 ACPI_ERROR((AE_INFO, 360 "Resize of Root Table Array is not allowed")); 361 return_ACPI_STATUS(AE_SUPPORT); 362 } 363 364 /* Increase the Table Array size */ 365 366 tables = ACPI_ALLOCATE_ZEROED(((acpi_size) acpi_gbl_root_table_list. 367 max_table_count + 368 ACPI_ROOT_TABLE_SIZE_INCREMENT) * 369 sizeof(struct acpi_table_desc)); 370 if (!tables) { 371 ACPI_ERROR((AE_INFO, 372 "Could not allocate new root table array")); 373 return_ACPI_STATUS(AE_NO_MEMORY); 374 } 375 376 /* Copy and free the previous table array */ 377 378 if (acpi_gbl_root_table_list.tables) { 379 ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, 380 (acpi_size) acpi_gbl_root_table_list. 381 max_table_count * sizeof(struct acpi_table_desc)); 382 383 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { 384 ACPI_FREE(acpi_gbl_root_table_list.tables); 385 } 386 } 387 388 acpi_gbl_root_table_list.tables = tables; 389 acpi_gbl_root_table_list.max_table_count += 390 ACPI_ROOT_TABLE_SIZE_INCREMENT; 391 acpi_gbl_root_table_list.flags |= (u8)ACPI_ROOT_ORIGIN_ALLOCATED; 392 393 return_ACPI_STATUS(AE_OK); 394 } 395 396 /******************************************************************************* 397 * 398 * FUNCTION: acpi_tb_store_table 399 * 400 * PARAMETERS: address - Table address 401 * table - Table header 402 * length - Table length 403 * flags - flags 404 * 405 * RETURN: Status and table index. 406 * 407 * DESCRIPTION: Add an ACPI table to the global table list 408 * 409 ******************************************************************************/ 410 411 acpi_status 412 acpi_tb_store_table(acpi_physical_address address, 413 struct acpi_table_header *table, 414 u32 length, u8 flags, u32 *table_index) 415 { 416 acpi_status status; 417 struct acpi_table_desc *new_table; 418 419 /* Ensure that there is room for the table in the Root Table List */ 420 421 if (acpi_gbl_root_table_list.current_table_count >= 422 acpi_gbl_root_table_list.max_table_count) { 423 status = acpi_tb_resize_root_table_list(); 424 if (ACPI_FAILURE(status)) { 425 return (status); 426 } 427 } 428 429 new_table = 430 &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list. 431 current_table_count]; 432 433 /* Initialize added table */ 434 435 new_table->address = address; 436 new_table->pointer = table; 437 new_table->length = length; 438 new_table->owner_id = 0; 439 new_table->flags = flags; 440 441 ACPI_MOVE_32_TO_32(&new_table->signature, table->signature); 442 443 *table_index = acpi_gbl_root_table_list.current_table_count; 444 acpi_gbl_root_table_list.current_table_count++; 445 return (AE_OK); 446 } 447 448 /******************************************************************************* 449 * 450 * FUNCTION: acpi_tb_delete_table 451 * 452 * PARAMETERS: table_index - Table index 453 * 454 * RETURN: None 455 * 456 * DESCRIPTION: Delete one internal ACPI table 457 * 458 ******************************************************************************/ 459 460 void acpi_tb_delete_table(struct acpi_table_desc *table_desc) 461 { 462 /* Table must be mapped or allocated */ 463 if (!table_desc->pointer) { 464 return; 465 } 466 switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) { 467 case ACPI_TABLE_ORIGIN_MAPPED: 468 acpi_os_unmap_memory(table_desc->pointer, table_desc->length); 469 break; 470 case ACPI_TABLE_ORIGIN_ALLOCATED: 471 ACPI_FREE(table_desc->pointer); 472 break; 473 474 /* Not mapped or allocated, there is nothing we can do */ 475 476 default: 477 return; 478 } 479 480 table_desc->pointer = NULL; 481 } 482 483 /******************************************************************************* 484 * 485 * FUNCTION: acpi_tb_terminate 486 * 487 * PARAMETERS: None 488 * 489 * RETURN: None 490 * 491 * DESCRIPTION: Delete all internal ACPI tables 492 * 493 ******************************************************************************/ 494 495 void acpi_tb_terminate(void) 496 { 497 u32 i; 498 499 ACPI_FUNCTION_TRACE(tb_terminate); 500 501 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 502 503 /* Delete the individual tables */ 504 505 for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) { 506 acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]); 507 } 508 509 /* 510 * Delete the root table array if allocated locally. Array cannot be 511 * mapped, so we don't need to check for that flag. 512 */ 513 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) { 514 ACPI_FREE(acpi_gbl_root_table_list.tables); 515 } 516 517 acpi_gbl_root_table_list.tables = NULL; 518 acpi_gbl_root_table_list.flags = 0; 519 acpi_gbl_root_table_list.current_table_count = 0; 520 521 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n")); 522 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 523 } 524 525 /******************************************************************************* 526 * 527 * FUNCTION: acpi_tb_delete_namespace_by_owner 528 * 529 * PARAMETERS: table_index - Table index 530 * 531 * RETURN: Status 532 * 533 * DESCRIPTION: Delete all namespace objects created when this table was loaded. 534 * 535 ******************************************************************************/ 536 537 acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index) 538 { 539 acpi_owner_id owner_id; 540 acpi_status status; 541 542 ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner); 543 544 status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 545 if (ACPI_FAILURE(status)) { 546 return_ACPI_STATUS(status); 547 } 548 549 if (table_index >= acpi_gbl_root_table_list.current_table_count) { 550 551 /* The table index does not exist */ 552 553 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 554 return_ACPI_STATUS(AE_NOT_EXIST); 555 } 556 557 /* Get the owner ID for this table, used to delete namespace nodes */ 558 559 owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id; 560 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 561 562 /* 563 * Need to acquire the namespace writer lock to prevent interference 564 * with any concurrent namespace walks. The interpreter must be 565 * released during the deletion since the acquisition of the deletion 566 * lock may block, and also since the execution of a namespace walk 567 * must be allowed to use the interpreter. 568 */ 569 (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER); 570 status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock); 571 572 acpi_ns_delete_namespace_by_owner(owner_id); 573 if (ACPI_FAILURE(status)) { 574 return_ACPI_STATUS(status); 575 } 576 577 acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock); 578 579 status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER); 580 return_ACPI_STATUS(status); 581 } 582 583 /******************************************************************************* 584 * 585 * FUNCTION: acpi_tb_allocate_owner_id 586 * 587 * PARAMETERS: table_index - Table index 588 * 589 * RETURN: Status 590 * 591 * DESCRIPTION: Allocates owner_id in table_desc 592 * 593 ******************************************************************************/ 594 595 acpi_status acpi_tb_allocate_owner_id(u32 table_index) 596 { 597 acpi_status status = AE_BAD_PARAMETER; 598 599 ACPI_FUNCTION_TRACE(tb_allocate_owner_id); 600 601 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 602 if (table_index < acpi_gbl_root_table_list.current_table_count) { 603 status = acpi_ut_allocate_owner_id 604 (&(acpi_gbl_root_table_list.tables[table_index].owner_id)); 605 } 606 607 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 608 return_ACPI_STATUS(status); 609 } 610 611 /******************************************************************************* 612 * 613 * FUNCTION: acpi_tb_release_owner_id 614 * 615 * PARAMETERS: table_index - Table index 616 * 617 * RETURN: Status 618 * 619 * DESCRIPTION: Releases owner_id in table_desc 620 * 621 ******************************************************************************/ 622 623 acpi_status acpi_tb_release_owner_id(u32 table_index) 624 { 625 acpi_status status = AE_BAD_PARAMETER; 626 627 ACPI_FUNCTION_TRACE(tb_release_owner_id); 628 629 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 630 if (table_index < acpi_gbl_root_table_list.current_table_count) { 631 acpi_ut_release_owner_id(& 632 (acpi_gbl_root_table_list. 633 tables[table_index].owner_id)); 634 status = AE_OK; 635 } 636 637 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 638 return_ACPI_STATUS(status); 639 } 640 641 /******************************************************************************* 642 * 643 * FUNCTION: acpi_tb_get_owner_id 644 * 645 * PARAMETERS: table_index - Table index 646 * owner_id - Where the table owner_id is returned 647 * 648 * RETURN: Status 649 * 650 * DESCRIPTION: returns owner_id for the ACPI table 651 * 652 ******************************************************************************/ 653 654 acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id) 655 { 656 acpi_status status = AE_BAD_PARAMETER; 657 658 ACPI_FUNCTION_TRACE(tb_get_owner_id); 659 660 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 661 if (table_index < acpi_gbl_root_table_list.current_table_count) { 662 *owner_id = 663 acpi_gbl_root_table_list.tables[table_index].owner_id; 664 status = AE_OK; 665 } 666 667 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 668 return_ACPI_STATUS(status); 669 } 670 671 /******************************************************************************* 672 * 673 * FUNCTION: acpi_tb_is_table_loaded 674 * 675 * PARAMETERS: table_index - Table index 676 * 677 * RETURN: Table Loaded Flag 678 * 679 ******************************************************************************/ 680 681 u8 acpi_tb_is_table_loaded(u32 table_index) 682 { 683 u8 is_loaded = FALSE; 684 685 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 686 if (table_index < acpi_gbl_root_table_list.current_table_count) { 687 is_loaded = (u8) 688 (acpi_gbl_root_table_list.tables[table_index].flags & 689 ACPI_TABLE_IS_LOADED); 690 } 691 692 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 693 return (is_loaded); 694 } 695 696 /******************************************************************************* 697 * 698 * FUNCTION: acpi_tb_set_table_loaded_flag 699 * 700 * PARAMETERS: table_index - Table index 701 * is_loaded - TRUE if table is loaded, FALSE otherwise 702 * 703 * RETURN: None 704 * 705 * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE. 706 * 707 ******************************************************************************/ 708 709 void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded) 710 { 711 712 (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES); 713 if (table_index < acpi_gbl_root_table_list.current_table_count) { 714 if (is_loaded) { 715 acpi_gbl_root_table_list.tables[table_index].flags |= 716 ACPI_TABLE_IS_LOADED; 717 } else { 718 acpi_gbl_root_table_list.tables[table_index].flags &= 719 ~ACPI_TABLE_IS_LOADED; 720 } 721 } 722 723 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); 724 } 725