drivers/acpi/acpica/tbdata.c

   1 /******************************************************************************
   2  *
   3  * Module Name: tbdata - Table manager data structure functions
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, 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("tbdata")
  51
  52 /*******************************************************************************
  53  *
  54  * FUNCTION:    acpi_tb_init_table_descriptor
  55  *
  56  * PARAMETERS:  table_desc              - Table descriptor
  57  *              address                 - Physical address of the table
  58  *              flags                   - Allocation flags of the table
  59  *              table                   - Pointer to the table
  60  *
  61  * RETURN:      None
  62  *
  63  * DESCRIPTION: Initialize a new table descriptor
  64  *
  65  ******************************************************************************/
  66 void
  67 acpi_tb_init_table_descriptor(struct acpi_table_desc *table_desc,
  68                               acpi_physical_address address,
  69                               u8 flags, struct acpi_table_header *table)
  70 {
  71
  72         /*
  73          * Initialize the table descriptor. Set the pointer to NULL, since the
  74          * table is not fully mapped at this time.
  75          */
  76         memset(table_desc, 0, sizeof(struct acpi_table_desc));
  77         table_desc->address = address;
  78         table_desc->length = table->length;
  79         table_desc->flags = flags;
  80         ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
  81 }
  82
  83 /*******************************************************************************
  84  *
  85  * FUNCTION:    acpi_tb_acquire_table
  86  *
  87  * PARAMETERS:  table_desc          - Table descriptor
  88  *              table_ptr           - Where table is returned
  89  *              table_length        - Where table length is returned
  90  *              table_flags         - Where table allocation flags are returned
  91  *
  92  * RETURN:      Status
  93  *
  94  * DESCRIPTION: Acquire an ACPI table. It can be used for tables not
  95  *              maintained in the acpi_gbl_root_table_list.
  96  *
  97  ******************************************************************************/
  98
  99 acpi_status
 100 acpi_tb_acquire_table(struct acpi_table_desc *table_desc,
 101                       struct acpi_table_header **table_ptr,
 102                       u32 *table_length, u8 *table_flags)
 103 {
 104         struct acpi_table_header *table = NULL;
 105
 106         switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
 107         case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
 108
 109                 table =
 110                     acpi_os_map_memory(table_desc->address, table_desc->length);
 111                 break;
 112
 113         case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
 114         case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
 115
 116                 table = ACPI_CAST_PTR(struct acpi_table_header,
 117                                       ACPI_PHYSADDR_TO_PTR(table_desc->
 118                                                            address));
 119                 break;
 120
 121         default:
 122
 123                 break;
 124         }
 125
 126         /* Table is not valid yet */
 127
 128         if (!table) {
 129                 return (AE_NO_MEMORY);
 130         }
 131
 132         /* Fill the return values */
 133
 134         *table_ptr = table;
 135         *table_length = table_desc->length;
 136         *table_flags = table_desc->flags;
 137         return (AE_OK);
 138 }
 139
 140 /*******************************************************************************
 141  *
 142  * FUNCTION:    acpi_tb_release_table
 143  *
 144  * PARAMETERS:  table               - Pointer for the table
 145  *              table_length        - Length for the table
 146  *              table_flags         - Allocation flags for the table
 147  *
 148  * RETURN:      None
 149  *
 150  * DESCRIPTION: Release a table. The inverse of acpi_tb_acquire_table().
 151  *
 152  ******************************************************************************/
 153
 154 void
 155 acpi_tb_release_table(struct acpi_table_header *table,
 156                       u32 table_length, u8 table_flags)
 157 {
 158
 159         switch (table_flags & ACPI_TABLE_ORIGIN_MASK) {
 160         case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
 161
 162                 acpi_os_unmap_memory(table, table_length);
 163                 break;
 164
 165         case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
 166         case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
 167         default:
 168
 169                 break;
 170         }
 171 }
 172
 173 /*******************************************************************************
 174  *
 175  * FUNCTION:    acpi_tb_acquire_temp_table
 176  *
 177  * PARAMETERS:  table_desc          - Table descriptor to be acquired
 178  *              address             - Address of the table
 179  *              flags               - Allocation flags of the table
 180  *
 181  * RETURN:      Status
 182  *
 183  * DESCRIPTION: This function validates the table header to obtain the length
 184  *              of a table and fills the table descriptor to make its state as
 185  *              "INSTALLED". Such a table descriptor is only used for verified
 186  *              installation.
 187  *
 188  ******************************************************************************/
 189
 190 acpi_status
 191 acpi_tb_acquire_temp_table(struct acpi_table_desc *table_desc,
 192                            acpi_physical_address address, u8 flags)
 193 {
 194         struct acpi_table_header *table_header;
 195
 196         switch (flags & ACPI_TABLE_ORIGIN_MASK) {
 197         case ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL:
 198
 199                 /* Get the length of the full table from the header */
 200
 201                 table_header =
 202                     acpi_os_map_memory(address,
 203                                        sizeof(struct acpi_table_header));
 204                 if (!table_header) {
 205                         return (AE_NO_MEMORY);
 206                 }
 207
 208                 acpi_tb_init_table_descriptor(table_desc, address, flags,
 209                                               table_header);
 210                 acpi_os_unmap_memory(table_header,
 211                                      sizeof(struct acpi_table_header));
 212                 return (AE_OK);
 213
 214         case ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL:
 215         case ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL:
 216
 217                 table_header = ACPI_CAST_PTR(struct acpi_table_header,
 218                                              ACPI_PHYSADDR_TO_PTR(address));
 219                 if (!table_header) {
 220                         return (AE_NO_MEMORY);
 221                 }
 222
 223                 acpi_tb_init_table_descriptor(table_desc, address, flags,
 224                                               table_header);
 225                 return (AE_OK);
 226
 227         default:
 228
 229                 break;
 230         }
 231
 232         /* Table is not valid yet */
 233
 234         return (AE_NO_MEMORY);
 235 }
 236
 237 /*******************************************************************************
 238  *
 239  * FUNCTION:    acpi_tb_release_temp_table
 240  *
 241  * PARAMETERS:  table_desc          - Table descriptor to be released
 242  *
 243  * RETURN:      Status
 244  *
 245  * DESCRIPTION: The inverse of acpi_tb_acquire_temp_table().
 246  *
 247  *****************************************************************************/
 248
 249 void acpi_tb_release_temp_table(struct acpi_table_desc *table_desc)
 250 {
 251
 252         /*
 253          * Note that the .Address is maintained by the callers of
 254          * acpi_tb_acquire_temp_table(), thus do not invoke acpi_tb_uninstall_table()
 255          * where .Address will be freed.
 256          */
 257         acpi_tb_invalidate_table(table_desc);
 258 }
 259
 260 /******************************************************************************
 261  *
 262  * FUNCTION:    acpi_tb_validate_table
 263  *
 264  * PARAMETERS:  table_desc          - Table descriptor
 265  *
 266  * RETURN:      Status
 267  *
 268  * DESCRIPTION: This function is called to validate the table, the returned
 269  *              table descriptor is in "VALIDATED" state.
 270  *
 271  *****************************************************************************/
 272
 273 acpi_status acpi_tb_validate_table(struct acpi_table_desc *table_desc)
 274 {
 275         acpi_status status = AE_OK;
 276
 277         ACPI_FUNCTION_TRACE(tb_validate_table);
 278
 279         /* Validate the table if necessary */
 280
 281         if (!table_desc->pointer) {
 282                 status = acpi_tb_acquire_table(table_desc, &table_desc->pointer,
 283                                                &table_desc->length,
 284                                                &table_desc->flags);
 285                 if (!table_desc->pointer) {
 286                         status = AE_NO_MEMORY;
 287                 }
 288         }
 289
 290         return_ACPI_STATUS(status);
 291 }
 292
 293 /*******************************************************************************
 294  *
 295  * FUNCTION:    acpi_tb_invalidate_table
 296  *
 297  * PARAMETERS:  table_desc          - Table descriptor
 298  *
 299  * RETURN:      None
 300  *
 301  * DESCRIPTION: Invalidate one internal ACPI table, this is the inverse of
 302  *              acpi_tb_validate_table().
 303  *
 304  ******************************************************************************/
 305
 306 void acpi_tb_invalidate_table(struct acpi_table_desc *table_desc)
 307 {
 308
 309         ACPI_FUNCTION_TRACE(tb_invalidate_table);
 310
 311         /* Table must be validated */
 312
 313         if (!table_desc->pointer) {
 314                 return_VOID;
 315         }
 316
 317         acpi_tb_release_table(table_desc->pointer, table_desc->length,
 318                               table_desc->flags);
 319         table_desc->pointer = NULL;
 320
 321         return_VOID;
 322 }
 323
 324 /******************************************************************************
 325  *
 326  * FUNCTION:    acpi_tb_validate_temp_table
 327  *
 328  * PARAMETERS:  table_desc          - Table descriptor
 329  *
 330  * RETURN:      Status
 331  *
 332  * DESCRIPTION: This function is called to validate the table, the returned
 333  *              table descriptor is in "VALIDATED" state.
 334  *
 335  *****************************************************************************/
 336
 337 acpi_status acpi_tb_validate_temp_table(struct acpi_table_desc *table_desc)
 338 {
 339
 340         if (!table_desc->pointer && !acpi_gbl_verify_table_checksum) {
 341                 /*
 342                  * Only validates the header of the table.
 343                  * Note that Length contains the size of the mapping after invoking
 344                  * this work around, this value is required by
 345                  * acpi_tb_release_temp_table().
 346                  * We can do this because in acpi_init_table_descriptor(), the Length
 347                  * field of the installed descriptor is filled with the actual
 348                  * table length obtaining from the table header.
 349                  */
 350                 table_desc->length = sizeof(struct acpi_table_header);
 351         }
 352
 353         return (acpi_tb_validate_table(table_desc));
 354 }
 355
 356 /******************************************************************************
 357  *
 358  * FUNCTION:    acpi_tb_verify_temp_table
 359  *
 360  * PARAMETERS:  table_desc          - Table descriptor
 361  *              signature           - Table signature to verify
 362  *
 363  * RETURN:      Status
 364  *
 365  * DESCRIPTION: This function is called to validate and verify the table, the
 366  *              returned table descriptor is in "VALIDATED" state.
 367  *
 368  *****************************************************************************/
 369
 370 acpi_status
 371 acpi_tb_verify_temp_table(struct acpi_table_desc * table_desc, char *signature)
 372 {
 373         acpi_status status = AE_OK;
 374
 375         ACPI_FUNCTION_TRACE(tb_verify_temp_table);
 376
 377         /* Validate the table */
 378
 379         status = acpi_tb_validate_temp_table(table_desc);
 380         if (ACPI_FAILURE(status)) {
 381                 return_ACPI_STATUS(AE_NO_MEMORY);
 382         }
 383
 384         /* If a particular signature is expected (DSDT/FACS), it must match */
 385
 386         if (signature && !ACPI_COMPARE_NAME(&table_desc->signature, signature)) {
 387                 ACPI_BIOS_ERROR((AE_INFO,
 388                                  "Invalid signature 0x%X for ACPI table, expected [%s]",
 389                                  table_desc->signature.integer, signature));
 390                 status = AE_BAD_SIGNATURE;
 391                 goto invalidate_and_exit;
 392         }
 393
 394         /* Verify the checksum */
 395
 396         if (acpi_gbl_verify_table_checksum) {
 397                 status =
 398                     acpi_tb_verify_checksum(table_desc->pointer,
 399                                             table_desc->length);
 400                 if (ACPI_FAILURE(status)) {
 401                         ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
 402                                         "%4.4s 0x%8.8X%8.8X"
 403                                         " Attempted table install failed",
 404                                         acpi_ut_valid_acpi_name(table_desc->
 405                                                                 signature.
 406                                                                 ascii) ?
 407                                         table_desc->signature.ascii : "????",
 408                                         ACPI_FORMAT_UINT64(table_desc->
 409                                                            address)));
 410
 411                         goto invalidate_and_exit;
 412                 }
 413         }
 414
 415         return_ACPI_STATUS(AE_OK);
 416
 417 invalidate_and_exit:
 418         acpi_tb_invalidate_table(table_desc);
 419         return_ACPI_STATUS(status);
 420 }
 421
 422 /*******************************************************************************
 423  *
 424  * FUNCTION:    acpi_tb_resize_root_table_list
 425  *
 426  * PARAMETERS:  None
 427  *
 428  * RETURN:      Status
 429  *
 430  * DESCRIPTION: Expand the size of global table array
 431  *
 432  ******************************************************************************/
 433
 434 acpi_status acpi_tb_resize_root_table_list(void)
 435 {
 436         struct acpi_table_desc *tables;
 437         u32 table_count;
 438
 439         ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
 440
 441         /* allow_resize flag is a parameter to acpi_initialize_tables */
 442
 443         if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
 444                 ACPI_ERROR((AE_INFO,
 445                             "Resize of Root Table Array is not allowed"));
 446                 return_ACPI_STATUS(AE_SUPPORT);
 447         }
 448
 449         /* Increase the Table Array size */
 450
 451         if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 452                 table_count = acpi_gbl_root_table_list.max_table_count;
 453         } else {
 454                 table_count = acpi_gbl_root_table_list.current_table_count;
 455         }
 456
 457         tables = ACPI_ALLOCATE_ZEROED(((acpi_size) table_count +
 458                                        ACPI_ROOT_TABLE_SIZE_INCREMENT) *
 459                                       sizeof(struct acpi_table_desc));
 460         if (!tables) {
 461                 ACPI_ERROR((AE_INFO,
 462                             "Could not allocate new root table array"));
 463                 return_ACPI_STATUS(AE_NO_MEMORY);
 464         }
 465
 466         /* Copy and free the previous table array */
 467
 468         if (acpi_gbl_root_table_list.tables) {
 469                 memcpy(tables, acpi_gbl_root_table_list.tables,
 470                        (acpi_size) table_count *
 471                        sizeof(struct acpi_table_desc));
 472
 473                 if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 474                         ACPI_FREE(acpi_gbl_root_table_list.tables);
 475                 }
 476         }
 477
 478         acpi_gbl_root_table_list.tables = tables;
 479         acpi_gbl_root_table_list.max_table_count =
 480             table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
 481         acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;
 482
 483         return_ACPI_STATUS(AE_OK);
 484 }
 485
 486 /*******************************************************************************
 487  *
 488  * FUNCTION:    acpi_tb_get_next_table_descriptor
 489  *
 490  * PARAMETERS:  table_index         - Where table index is returned
 491  *              table_desc          - Where table descriptor is returned
 492  *
 493  * RETURN:      Status and table index/descriptor.
 494  *
 495  * DESCRIPTION: Allocate a new ACPI table entry to the global table list
 496  *
 497  ******************************************************************************/
 498
 499 acpi_status
 500 acpi_tb_get_next_table_descriptor(u32 *table_index,
 501                                   struct acpi_table_desc **table_desc)
 502 {
 503         acpi_status status;
 504         u32 i;
 505
 506         /* Ensure that there is room for the table in the Root Table List */
 507
 508         if (acpi_gbl_root_table_list.current_table_count >=
 509             acpi_gbl_root_table_list.max_table_count) {
 510                 status = acpi_tb_resize_root_table_list();
 511                 if (ACPI_FAILURE(status)) {
 512                         return (status);
 513                 }
 514         }
 515
 516         i = acpi_gbl_root_table_list.current_table_count;
 517         acpi_gbl_root_table_list.current_table_count++;
 518
 519         if (table_index) {
 520                 *table_index = i;
 521         }
 522         if (table_desc) {
 523                 *table_desc = &acpi_gbl_root_table_list.tables[i];
 524         }
 525
 526         return (AE_OK);
 527 }
 528
 529 /*******************************************************************************
 530  *
 531  * FUNCTION:    acpi_tb_terminate
 532  *
 533  * PARAMETERS:  None
 534  *
 535  * RETURN:      None
 536  *
 537  * DESCRIPTION: Delete all internal ACPI tables
 538  *
 539  ******************************************************************************/
 540
 541 void acpi_tb_terminate(void)
 542 {
 543         u32 i;
 544
 545         ACPI_FUNCTION_TRACE(tb_terminate);
 546
 547         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 548
 549         /* Delete the individual tables */
 550
 551         for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
 552                 acpi_tb_uninstall_table(&acpi_gbl_root_table_list.tables[i]);
 553         }
 554
 555         /*
 556          * Delete the root table array if allocated locally. Array cannot be
 557          * mapped, so we don't need to check for that flag.
 558          */
 559         if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 560                 ACPI_FREE(acpi_gbl_root_table_list.tables);
 561         }
 562
 563         acpi_gbl_root_table_list.tables = NULL;
 564         acpi_gbl_root_table_list.flags = 0;
 565         acpi_gbl_root_table_list.current_table_count = 0;
 566
 567         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
 568
 569         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 570         return_VOID;
 571 }
 572
 573 /*******************************************************************************
 574  *
 575  * FUNCTION:    acpi_tb_delete_namespace_by_owner
 576  *
 577  * PARAMETERS:  table_index         - Table index
 578  *
 579  * RETURN:      Status
 580  *
 581  * DESCRIPTION: Delete all namespace objects created when this table was loaded.
 582  *
 583  ******************************************************************************/
 584
 585 acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
 586 {
 587         acpi_owner_id owner_id;
 588         acpi_status status;
 589
 590         ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
 591
 592         status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 593         if (ACPI_FAILURE(status)) {
 594                 return_ACPI_STATUS(status);
 595         }
 596
 597         if (table_index >= acpi_gbl_root_table_list.current_table_count) {
 598
 599                 /* The table index does not exist */
 600
 601                 (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 602                 return_ACPI_STATUS(AE_NOT_EXIST);
 603         }
 604
 605         /* Get the owner ID for this table, used to delete namespace nodes */
 606
 607         owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
 608         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 609
 610         /*
 611          * Need to acquire the namespace writer lock to prevent interference
 612          * with any concurrent namespace walks. The interpreter must be
 613          * released during the deletion since the acquisition of the deletion
 614          * lock may block, and also since the execution of a namespace walk
 615          * must be allowed to use the interpreter.
 616          */
 617         (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
 618         status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
 619
 620         acpi_ns_delete_namespace_by_owner(owner_id);
 621         if (ACPI_FAILURE(status)) {
 622                 return_ACPI_STATUS(status);
 623         }
 624
 625         acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
 626
 627         status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
 628         return_ACPI_STATUS(status);
 629 }
 630
 631 /*******************************************************************************
 632  *
 633  * FUNCTION:    acpi_tb_allocate_owner_id
 634  *
 635  * PARAMETERS:  table_index         - Table index
 636  *
 637  * RETURN:      Status
 638  *
 639  * DESCRIPTION: Allocates owner_id in table_desc
 640  *
 641  ******************************************************************************/
 642
 643 acpi_status acpi_tb_allocate_owner_id(u32 table_index)
 644 {
 645         acpi_status status = AE_BAD_PARAMETER;
 646
 647         ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
 648
 649         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 650         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 651                 status =
 652                     acpi_ut_allocate_owner_id(&
 653                                               (acpi_gbl_root_table_list.
 654                                                tables[table_index].owner_id));
 655         }
 656
 657         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 658         return_ACPI_STATUS(status);
 659 }
 660
 661 /*******************************************************************************
 662  *
 663  * FUNCTION:    acpi_tb_release_owner_id
 664  *
 665  * PARAMETERS:  table_index         - Table index
 666  *
 667  * RETURN:      Status
 668  *
 669  * DESCRIPTION: Releases owner_id in table_desc
 670  *
 671  ******************************************************************************/
 672
 673 acpi_status acpi_tb_release_owner_id(u32 table_index)
 674 {
 675         acpi_status status = AE_BAD_PARAMETER;
 676
 677         ACPI_FUNCTION_TRACE(tb_release_owner_id);
 678
 679         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 680         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 681                 acpi_ut_release_owner_id(&
 682                                          (acpi_gbl_root_table_list.
 683                                           tables[table_index].owner_id));
 684                 status = AE_OK;
 685         }
 686
 687         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 688         return_ACPI_STATUS(status);
 689 }
 690
 691 /*******************************************************************************
 692  *
 693  * FUNCTION:    acpi_tb_get_owner_id
 694  *
 695  * PARAMETERS:  table_index         - Table index
 696  *              owner_id            - Where the table owner_id is returned
 697  *
 698  * RETURN:      Status
 699  *
 700  * DESCRIPTION: returns owner_id for the ACPI table
 701  *
 702  ******************************************************************************/
 703
 704 acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id * owner_id)
 705 {
 706         acpi_status status = AE_BAD_PARAMETER;
 707
 708         ACPI_FUNCTION_TRACE(tb_get_owner_id);
 709
 710         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 711         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 712                 *owner_id =
 713                     acpi_gbl_root_table_list.tables[table_index].owner_id;
 714                 status = AE_OK;
 715         }
 716
 717         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 718         return_ACPI_STATUS(status);
 719 }
 720
 721 /*******************************************************************************
 722  *
 723  * FUNCTION:    acpi_tb_is_table_loaded
 724  *
 725  * PARAMETERS:  table_index         - Index into the root table
 726  *
 727  * RETURN:      Table Loaded Flag
 728  *
 729  ******************************************************************************/
 730
 731 u8 acpi_tb_is_table_loaded(u32 table_index)
 732 {
 733         u8 is_loaded = FALSE;
 734
 735         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 736         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 737                 is_loaded = (u8)
 738                     (acpi_gbl_root_table_list.tables[table_index].flags &
 739                      ACPI_TABLE_IS_LOADED);
 740         }
 741
 742         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 743         return (is_loaded);
 744 }
 745
 746 /*******************************************************************************
 747  *
 748  * FUNCTION:    acpi_tb_set_table_loaded_flag
 749  *
 750  * PARAMETERS:  table_index         - Table index
 751  *              is_loaded           - TRUE if table is loaded, FALSE otherwise
 752  *
 753  * RETURN:      None
 754  *
 755  * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
 756  *
 757  ******************************************************************************/
 758
 759 void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
 760 {
 761
 762         (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 763         if (table_index < acpi_gbl_root_table_list.current_table_count) {
 764                 if (is_loaded) {
 765                         acpi_gbl_root_table_list.tables[table_index].flags |=
 766                             ACPI_TABLE_IS_LOADED;
 767                 } else {
 768                         acpi_gbl_root_table_list.tables[table_index].flags &=
 769                             ~ACPI_TABLE_IS_LOADED;
 770                 }
 771         }
 772
 773         (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 774 }