LXR linux/drivers/acpi/tables/tbxface.c

   1/******************************************************************************
   2 *
   3 * Module Name: tbxface - Public interfaces to the ACPI subsystem
   4 *                         ACPI table oriented interfaces
   5 *
   6 *****************************************************************************/
   7
   8/*
   9 * Copyright (C) 2000 - 2007, R. Byron Moore
  10 * All rights reserved.
  11 *
  12 * Redistribution and use in source and binary forms, with or without
  13 * modification, are permitted provided that the following conditions
  14 * are met:
  15 * 1. Redistributions of source code must retain the above copyright
  16 *    notice, this list of conditions, and the following disclaimer,
  17 *    without modification.
  18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19 *    substantially similar to the "NO WARRANTY" disclaimer below
  20 *    ("Disclaimer") and any redistribution must be conditioned upon
  21 *    including a substantially similar Disclaimer requirement for further
  22 *    binary redistribution.
  23 * 3. Neither the names of the above-listed copyright holders nor the names
  24 *    of any contributors may be used to endorse or promote products derived
  25 *    from this software without specific prior written permission.
  26 *
  27 * Alternatively, this software may be distributed under the terms of the
  28 * GNU General Public License ("GPL") version 2 as published by the Free
  29 * Software Foundation.
  30 *
  31 * NO WARRANTY
  32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42 * POSSIBILITY OF SUCH DAMAGES.
  43 */
  44
  45#include <acpi/acpi.h>
  46#include <acpi/acnamesp.h>
  47#include <acpi/actables.h>
  48
  49#define _COMPONENT          ACPI_TABLES
  50ACPI_MODULE_NAME("tbxface")
  51
  52/* Local prototypes */
  53static acpi_status acpi_tb_load_namespace(void);
  54
  55static int no_auto_ssdt;
  56
  57/*******************************************************************************
  58 *
  59 * FUNCTION:    acpi_allocate_root_table
  60 *
  61 * PARAMETERS:  initial_table_count - Size of initial_table_array, in number of
  62 *                                    struct acpi_table_desc structures
  63 *
  64 * RETURN:      Status
  65 *
  66 * DESCRIPTION: Allocate a root table array. Used by i_aSL compiler and
  67 *              acpi_initialize_tables.
  68 *
  69 ******************************************************************************/
  70
  71acpi_status acpi_allocate_root_table(u32 initial_table_count)
  72{
  73
  74        acpi_gbl_root_table_list.size = initial_table_count;
  75        acpi_gbl_root_table_list.flags = ACPI_ROOT_ALLOW_RESIZE;
  76
  77        return (acpi_tb_resize_root_table_list());
  78}
  79
  80/*******************************************************************************
  81 *
  82 * FUNCTION:    acpi_initialize_tables
  83 *
  84 * PARAMETERS:  initial_table_array - Pointer to an array of pre-allocated
  85 *                                    struct acpi_table_desc structures. If NULL, the
  86 *                                    array is dynamically allocated.
  87 *              initial_table_count - Size of initial_table_array, in number of
  88 *                                    struct acpi_table_desc structures
  89 *              allow_realloc       - Flag to tell Table Manager if resize of
  90 *                                    pre-allocated array is allowed. Ignored
  91 *                                    if initial_table_array is NULL.
  92 *
  93 * RETURN:      Status
  94 *
  95 * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT.
  96 *
  97 * NOTE:        Allows static allocation of the initial table array in order
  98 *              to avoid the use of dynamic memory in confined environments
  99 *              such as the kernel boot sequence where it may not be available.
 100 *
 101 *              If the host OS memory managers are initialized, use NULL for
 102 *              initial_table_array, and the table will be dynamically allocated.
 103 *
 104 ******************************************************************************/
 105
 106acpi_status __init
 107acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
 108                       u32 initial_table_count, u8 allow_resize)
 109{
 110        acpi_physical_address rsdp_address;
 111        acpi_status status;
 112
 113        ACPI_FUNCTION_TRACE(acpi_initialize_tables);
 114
 115        /*
 116         * Set up the Root Table Array
 117         * Allocate the table array if requested
 118         */
 119        if (!initial_table_array) {
 120                status = acpi_allocate_root_table(initial_table_count);
 121                if (ACPI_FAILURE(status)) {
 122                        return_ACPI_STATUS(status);
 123                }
 124        } else {
 125                /* Root Table Array has been statically allocated by the host */
 126
 127                ACPI_MEMSET(initial_table_array, 0,
 128                            initial_table_count *
 129                            sizeof(struct acpi_table_desc));
 130
 131                acpi_gbl_root_table_list.tables = initial_table_array;
 132                acpi_gbl_root_table_list.size = initial_table_count;
 133                acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN;
 134                if (allow_resize) {
 135                        acpi_gbl_root_table_list.flags |=
 136                            ACPI_ROOT_ALLOW_RESIZE;
 137                }
 138        }
 139
 140        /* Get the address of the RSDP */
 141
 142        rsdp_address = acpi_os_get_root_pointer();
 143        if (!rsdp_address) {
 144                return_ACPI_STATUS(AE_NOT_FOUND);
 145        }
 146
 147        /*
 148         * Get the root table (RSDT or XSDT) and extract all entries to the local
 149         * Root Table Array. This array contains the information of the RSDT/XSDT
 150         * in a common, more useable format.
 151         */
 152        status =
 153            acpi_tb_parse_root_table(rsdp_address, ACPI_TABLE_ORIGIN_MAPPED);
 154        return_ACPI_STATUS(status);
 155}
 156
 157/*******************************************************************************
 158 *
 159 * FUNCTION:    acpi_reallocate_root_table
 160 *
 161 * PARAMETERS:  None
 162 *
 163 * RETURN:      Status
 164 *
 165 * DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the
 166 *              root list from the previously provided scratch area. Should
 167 *              be called once dynamic memory allocation is available in the
 168 *              kernel
 169 *
 170 ******************************************************************************/
 171acpi_status acpi_reallocate_root_table(void)
 172{
 173        struct acpi_table_desc *tables;
 174        acpi_size new_size;
 175
 176        ACPI_FUNCTION_TRACE(acpi_reallocate_root_table);
 177
 178        /*
 179         * Only reallocate the root table if the host provided a static buffer
 180         * for the table array in the call to acpi_initialize_tables.
 181         */
 182        if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
 183                return_ACPI_STATUS(AE_SUPPORT);
 184        }
 185
 186        new_size =
 187            (acpi_gbl_root_table_list.count +
 188             ACPI_ROOT_TABLE_SIZE_INCREMENT) * sizeof(struct acpi_table_desc);
 189
 190        /* Create new array and copy the old array */
 191
 192        tables = ACPI_ALLOCATE_ZEROED(new_size);
 193        if (!tables) {
 194                return_ACPI_STATUS(AE_NO_MEMORY);
 195        }
 196
 197        ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables, new_size);
 198
 199        acpi_gbl_root_table_list.size = acpi_gbl_root_table_list.count;
 200        acpi_gbl_root_table_list.tables = tables;
 201        acpi_gbl_root_table_list.flags =
 202            ACPI_ROOT_ORIGIN_ALLOCATED | ACPI_ROOT_ALLOW_RESIZE;
 203
 204        return_ACPI_STATUS(AE_OK);
 205}
 206
 207/*******************************************************************************
 208 *
 209 * FUNCTION:    acpi_load_table
 210 *
 211 * PARAMETERS:  table_ptr       - pointer to a buffer containing the entire
 212 *                                table to be loaded
 213 *
 214 * RETURN:      Status
 215 *
 216 * DESCRIPTION: This function is called to load a table from the caller's
 217 *              buffer. The buffer must contain an entire ACPI Table including
 218 *              a valid header. The header fields will be verified, and if it
 219 *              is determined that the table is invalid, the call will fail.
 220 *
 221 ******************************************************************************/
 222acpi_status acpi_load_table(struct acpi_table_header *table_ptr)
 223{
 224        acpi_status status;
 225        acpi_native_uint table_index;
 226        struct acpi_table_desc table_desc;
 227
 228        if (!table_ptr)
 229                return AE_BAD_PARAMETER;
 230
 231        ACPI_MEMSET(&table_desc, 0, sizeof(struct acpi_table_desc));
 232        table_desc.pointer = table_ptr;
 233        table_desc.length = table_ptr->length;
 234        table_desc.flags = ACPI_TABLE_ORIGIN_UNKNOWN;
 235
 236        /*
 237         * Install the new table into the local data structures
 238         */
 239        status = acpi_tb_add_table(&table_desc, &table_index);
 240        if (ACPI_FAILURE(status)) {
 241                return status;
 242        }
 243        status = acpi_ns_load_table(table_index, acpi_gbl_root_node);
 244        return status;
 245}
 246
 247ACPI_EXPORT_SYMBOL(acpi_load_table)
 248
 249/******************************************************************************
 250 *
 251 * FUNCTION:    acpi_get_table_header
 252 *
 253 * PARAMETERS:  Signature           - ACPI signature of needed table
 254 *              Instance            - Which instance (for SSDTs)
 255 *              out_table_header    - The pointer to the table header to fill
 256 *
 257 * RETURN:      Status and pointer to mapped table header
 258 *
 259 * DESCRIPTION: Finds an ACPI table header.
 260 *
 261 * NOTE:        Caller is responsible in unmapping the header with
 262 *              acpi_os_unmap_memory
 263 *
 264 *****************************************************************************/
 265acpi_status
 266acpi_get_table_header(char *signature,
 267                      acpi_native_uint instance,
 268                      struct acpi_table_header * out_table_header)
 269{
 270        acpi_native_uint i;
 271        acpi_native_uint j;
 272        struct acpi_table_header *header;
 273
 274        /* Parameter validation */
 275
 276        if (!signature || !out_table_header) {
 277                return (AE_BAD_PARAMETER);
 278        }
 279
 280        /*
 281         * Walk the root table list
 282         */
 283        for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
 284                if (!ACPI_COMPARE_NAME
 285                    (&(acpi_gbl_root_table_list.tables[i].signature),
 286                     signature)) {
 287                        continue;
 288                }
 289
 290                if (++j < instance) {
 291                        continue;
 292                }
 293
 294                if (!acpi_gbl_root_table_list.tables[i].pointer) {
 295                        if ((acpi_gbl_root_table_list.tables[i].
 296                             flags & ACPI_TABLE_ORIGIN_MASK) ==
 297                            ACPI_TABLE_ORIGIN_MAPPED) {
 298                                header =
 299                                    acpi_os_map_memory(acpi_gbl_root_table_list.
 300                                                       tables[i].address,
 301                                                       sizeof(struct
 302                                                              acpi_table_header));
 303                                if (!header) {
 304                                        return AE_NO_MEMORY;
 305                                }
 306                                ACPI_MEMCPY(out_table_header, header,
 307                                            sizeof(struct acpi_table_header));
 308                                acpi_os_unmap_memory(header,
 309                                                     sizeof(struct
 310                                                            acpi_table_header));
 311                        } else {
 312                                return AE_NOT_FOUND;
 313                        }
 314                } else {
 315                        ACPI_MEMCPY(out_table_header,
 316                                    acpi_gbl_root_table_list.tables[i].pointer,
 317                                    sizeof(struct acpi_table_header));
 318                }
 319                return (AE_OK);
 320        }
 321
 322        return (AE_NOT_FOUND);
 323}
 324
 325ACPI_EXPORT_SYMBOL(acpi_get_table_header)
 326
 327/******************************************************************************
 328 *
 329 * FUNCTION:    acpi_unload_table_id
 330 *
 331 * PARAMETERS:  id            - Owner ID of the table to be removed.
 332 *
 333 * RETURN:      Status
 334 *
 335 * DESCRIPTION: This routine is used to force the unload of a table (by id)
 336 *
 337 ******************************************************************************/
 338acpi_status acpi_unload_table_id(acpi_owner_id id)
 339{
 340        int i;
 341        acpi_status status = AE_NOT_EXIST;
 342
 343        ACPI_FUNCTION_TRACE(acpi_unload_table_id);
 344
 345        /* Find table in the global table list */
 346        for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 347                if (id != acpi_gbl_root_table_list.tables[i].owner_id) {
 348                        continue;
 349                }
 350                /*
 351                 * Delete all namespace objects owned by this table. Note that these
 352                 * objects can appear anywhere in the namespace by virtue of the AML
 353                 * "Scope" operator. Thus, we need to track ownership by an ID, not
 354                 * simply a position within the hierarchy
 355                 */
 356                acpi_tb_delete_namespace_by_owner(i);
 357                status = acpi_tb_release_owner_id(i);
 358                acpi_tb_set_table_loaded_flag(i, FALSE);
 359                break;
 360        }
 361        return_ACPI_STATUS(status);
 362}
 363
 364ACPI_EXPORT_SYMBOL(acpi_unload_table_id)
 365
 366/*******************************************************************************
 367 *
 368 * FUNCTION:    acpi_get_table
 369 *
 370 * PARAMETERS:  Signature           - ACPI signature of needed table
 371 *              Instance            - Which instance (for SSDTs)
 372 *              out_table           - Where the pointer to the table is returned
 373 *
 374 * RETURN:      Status and pointer to table
 375 *
 376 * DESCRIPTION: Finds and verifies an ACPI table.
 377 *
 378 *****************************************************************************/
 379acpi_status
 380acpi_get_table(char *signature,
 381               acpi_native_uint instance, struct acpi_table_header **out_table)
 382{
 383        acpi_native_uint i;
 384        acpi_native_uint j;
 385        acpi_status status;
 386
 387        /* Parameter validation */
 388
 389        if (!signature || !out_table) {
 390                return (AE_BAD_PARAMETER);
 391        }
 392
 393        /*
 394         * Walk the root table list
 395         */
 396        for (i = 0, j = 0; i < acpi_gbl_root_table_list.count; i++) {
 397                if (!ACPI_COMPARE_NAME
 398                    (&(acpi_gbl_root_table_list.tables[i].signature),
 399                     signature)) {
 400                        continue;
 401                }
 402
 403                if (++j < instance) {
 404                        continue;
 405                }
 406
 407                status =
 408                    acpi_tb_verify_table(&acpi_gbl_root_table_list.tables[i]);
 409                if (ACPI_SUCCESS(status)) {
 410                        *out_table = acpi_gbl_root_table_list.tables[i].pointer;
 411                }
 412
 413                if (!acpi_gbl_permanent_mmap) {
 414                        acpi_gbl_root_table_list.tables[i].pointer = NULL;
 415                }
 416
 417                return (status);
 418        }
 419
 420        return (AE_NOT_FOUND);
 421}
 422
 423ACPI_EXPORT_SYMBOL(acpi_get_table)
 424
 425/*******************************************************************************
 426 *
 427 * FUNCTION:    acpi_get_table_by_index
 428 *
 429 * PARAMETERS:  table_index         - Table index
 430 *              Table               - Where the pointer to the table is returned
 431 *
 432 * RETURN:      Status and pointer to the table
 433 *
 434 * DESCRIPTION: Obtain a table by an index into the global table list.
 435 *
 436 ******************************************************************************/
 437acpi_status
 438acpi_get_table_by_index(acpi_native_uint table_index,
 439                        struct acpi_table_header ** table)
 440{
 441        acpi_status status;
 442
 443        ACPI_FUNCTION_TRACE(acpi_get_table_by_index);
 444
 445        /* Parameter validation */
 446
 447        if (!table) {
 448                return_ACPI_STATUS(AE_BAD_PARAMETER);
 449        }
 450
 451        (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 452
 453        /* Validate index */
 454
 455        if (table_index >= acpi_gbl_root_table_list.count) {
 456                (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 457                return_ACPI_STATUS(AE_BAD_PARAMETER);
 458        }
 459
 460        if (!acpi_gbl_root_table_list.tables[table_index].pointer) {
 461
 462                /* Table is not mapped, map it */
 463
 464                status =
 465                    acpi_tb_verify_table(&acpi_gbl_root_table_list.
 466                                         tables[table_index]);
 467                if (ACPI_FAILURE(status)) {
 468                        (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 469                        return_ACPI_STATUS(status);
 470                }
 471        }
 472
 473        *table = acpi_gbl_root_table_list.tables[table_index].pointer;
 474        (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 475        return_ACPI_STATUS(AE_OK);
 476}
 477
 478ACPI_EXPORT_SYMBOL(acpi_get_table_by_index)
 479
 480/*******************************************************************************
 481 *
 482 * FUNCTION:    acpi_tb_load_namespace
 483 *
 484 * PARAMETERS:  None
 485 *
 486 * RETURN:      Status
 487 *
 488 * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
 489 *              the RSDT/XSDT.
 490 *
 491 ******************************************************************************/
 492static acpi_status acpi_tb_load_namespace(void)
 493{
 494        acpi_status status;
 495        struct acpi_table_header *table;
 496        acpi_native_uint i;
 497
 498        ACPI_FUNCTION_TRACE(tb_load_namespace);
 499
 500        (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 501
 502        /*
 503         * Load the namespace. The DSDT is required, but any SSDT and PSDT tables
 504         * are optional.
 505         */
 506        if (!acpi_gbl_root_table_list.count ||
 507            !ACPI_COMPARE_NAME(&
 508                               (acpi_gbl_root_table_list.
 509                                tables[ACPI_TABLE_INDEX_DSDT].signature),
 510                               ACPI_SIG_DSDT)
 511            ||
 512            ACPI_FAILURE(acpi_tb_verify_table
 513                         (&acpi_gbl_root_table_list.
 514                          tables[ACPI_TABLE_INDEX_DSDT]))) {
 515                status = AE_NO_ACPI_TABLES;
 516                goto unlock_and_exit;
 517        }
 518
 519        /*
 520         * Find DSDT table
 521         */
 522        status =
 523            acpi_os_table_override(acpi_gbl_root_table_list.
 524                                   tables[ACPI_TABLE_INDEX_DSDT].pointer,
 525                                   &table);
 526        if (ACPI_SUCCESS(status) && table) {
 527                /*
 528                 * DSDT table has been found
 529                 */
 530                acpi_tb_delete_table(&acpi_gbl_root_table_list.
 531                                     tables[ACPI_TABLE_INDEX_DSDT]);
 532                acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].pointer =
 533                    table;
 534                acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].length =
 535                    table->length;
 536                acpi_gbl_root_table_list.tables[ACPI_TABLE_INDEX_DSDT].flags =
 537                    ACPI_TABLE_ORIGIN_UNKNOWN;
 538
 539                ACPI_INFO((AE_INFO, "Table DSDT replaced by host OS"));
 540                acpi_tb_print_table_header(0, table);
 541
 542                if (no_auto_ssdt == 0) {
 543                        printk(KERN_WARNING "ACPI: DSDT override uses original SSDTs unless \"acpi_no_auto_ssdt\"");
 544                }
 545        }
 546
 547        status =
 548            acpi_tb_verify_table(&acpi_gbl_root_table_list.
 549                                 tables[ACPI_TABLE_INDEX_DSDT]);
 550        if (ACPI_FAILURE(status)) {
 551
 552                /* A valid DSDT is required */
 553
 554                status = AE_NO_ACPI_TABLES;
 555                goto unlock_and_exit;
 556        }
 557
 558        (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 559
 560        /*
 561         * Load and parse tables.
 562         */
 563        status = acpi_ns_load_table(ACPI_TABLE_INDEX_DSDT, acpi_gbl_root_node);
 564        if (ACPI_FAILURE(status)) {
 565                return_ACPI_STATUS(status);
 566        }
 567
 568        /*
 569         * Load any SSDT or PSDT tables. Note: Loop leaves tables locked
 570         */
 571        (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 572        for (i = 0; i < acpi_gbl_root_table_list.count; ++i) {
 573                if ((!ACPI_COMPARE_NAME
 574                     (&(acpi_gbl_root_table_list.tables[i].signature),
 575                      ACPI_SIG_SSDT)
 576                     &&
 577                     !ACPI_COMPARE_NAME(&
 578                                        (acpi_gbl_root_table_list.tables[i].
 579                                         signature), ACPI_SIG_PSDT))
 580                    ||
 581                    ACPI_FAILURE(acpi_tb_verify_table
 582                                 (&acpi_gbl_root_table_list.tables[i]))) {
 583                        continue;
 584                }
 585
 586                if (no_auto_ssdt) {
 587                        printk(KERN_WARNING "ACPI: SSDT ignored due to \"acpi_no_auto_ssdt\"\n");
 588                        continue;
 589                }
 590
 591                /* Ignore errors while loading tables, get as many as possible */
 592
 593                (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 594                (void)acpi_ns_load_table(i, acpi_gbl_root_node);
 595                (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
 596        }
 597
 598        ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n"));
 599
 600      unlock_and_exit:
 601        (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 602        return_ACPI_STATUS(status);
 603}
 604
 605/*******************************************************************************
 606 *
 607 * FUNCTION:    acpi_load_tables
 608 *
 609 * PARAMETERS:  None
 610 *
 611 * RETURN:      Status
 612 *
 613 * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
 614 *
 615 ******************************************************************************/
 616
 617acpi_status acpi_load_tables(void)
 618{
 619        acpi_status status;
 620
 621        ACPI_FUNCTION_TRACE(acpi_load_tables);
 622
 623        /*
 624         * Load the namespace from the tables
 625         */
 626        status = acpi_tb_load_namespace();
 627        if (ACPI_FAILURE(status)) {
 628                ACPI_EXCEPTION((AE_INFO, status,
 629                                "While loading namespace from ACPI tables"));
 630        }
 631
 632        return_ACPI_STATUS(status);
 633}
 634
 635ACPI_EXPORT_SYMBOL(acpi_load_tables)
 636
 637
 638static int __init acpi_no_auto_ssdt_setup(char *s) {
 639
 640        printk(KERN_NOTICE "ACPI: SSDT auto-load disabled\n");
 641
 642        no_auto_ssdt = 1;
 643
 644        return 1;
 645}
 646
 647__setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup);
 648