Pileus Git - ~andy/linux/blob - drivers/acpi/acpica/utxface.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utxface - External interfaces for "global" ACPI functions
   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 <linux/export.h>
  45 #include <acpi/acpi.h>
  46 #include "accommon.h"
  47 #include "acevents.h"
  48 #include "acnamesp.h"
  49 #include "acdebug.h"
  50 #include "actables.h"
  51 #include "acinterp.h"
  52
  53 #define _COMPONENT          ACPI_UTILITIES
  54 ACPI_MODULE_NAME("utxface")
  55
  56 #ifndef ACPI_ASL_COMPILER
  57 /*******************************************************************************
  58  *
  59  * FUNCTION:    acpi_initialize_subsystem
  60  *
  61  * PARAMETERS:  None
  62  *
  63  * RETURN:      Status
  64  *
  65  * DESCRIPTION: Initializes all global variables.  This is the first function
  66  *              called, so any early initialization belongs here.
  67  *
  68  ******************************************************************************/
  69 acpi_status __init acpi_initialize_subsystem(void)
  70 {
  71         acpi_status status;
  72
  73         ACPI_FUNCTION_TRACE(acpi_initialize_subsystem);
  74
  75         acpi_gbl_startup_flags = ACPI_SUBSYSTEM_INITIALIZE;
  76         ACPI_DEBUG_EXEC(acpi_ut_init_stack_ptr_trace());
  77
  78         /* Initialize the OS-Dependent layer */
  79
  80         status = acpi_os_initialize();
  81         if (ACPI_FAILURE(status)) {
  82                 ACPI_EXCEPTION((AE_INFO, status, "During OSL initialization"));
  83                 return_ACPI_STATUS(status);
  84         }
  85
  86         /* Initialize all globals used by the subsystem */
  87
  88         status = acpi_ut_init_globals();
  89         if (ACPI_FAILURE(status)) {
  90                 ACPI_EXCEPTION((AE_INFO, status,
  91                                 "During initialization of globals"));
  92                 return_ACPI_STATUS(status);
  93         }
  94
  95         /* Create the default mutex objects */
  96
  97         status = acpi_ut_mutex_initialize();
  98         if (ACPI_FAILURE(status)) {
  99                 ACPI_EXCEPTION((AE_INFO, status,
 100                                 "During Global Mutex creation"));
 101                 return_ACPI_STATUS(status);
 102         }
 103
 104         /*
 105          * Initialize the namespace manager and
 106          * the root of the namespace tree
 107          */
 108         status = acpi_ns_root_initialize();
 109         if (ACPI_FAILURE(status)) {
 110                 ACPI_EXCEPTION((AE_INFO, status,
 111                                 "During Namespace initialization"));
 112                 return_ACPI_STATUS(status);
 113         }
 114
 115         /* Initialize the global OSI interfaces list with the static names */
 116
 117         status = acpi_ut_initialize_interfaces();
 118         if (ACPI_FAILURE(status)) {
 119                 ACPI_EXCEPTION((AE_INFO, status,
 120                                 "During OSI interfaces initialization"));
 121                 return_ACPI_STATUS(status);
 122         }
 123
 124         /* If configured, initialize the AML debugger */
 125
 126         ACPI_DEBUGGER_EXEC(status = acpi_db_initialize());
 127         return_ACPI_STATUS(status);
 128 }
 129
 130 /*******************************************************************************
 131  *
 132  * FUNCTION:    acpi_enable_subsystem
 133  *
 134  * PARAMETERS:  flags           - Init/enable Options
 135  *
 136  * RETURN:      Status
 137  *
 138  * DESCRIPTION: Completes the subsystem initialization including hardware.
 139  *              Puts system into ACPI mode if it isn't already.
 140  *
 141  ******************************************************************************/
 142 acpi_status acpi_enable_subsystem(u32 flags)
 143 {
 144         acpi_status status = AE_OK;
 145
 146         ACPI_FUNCTION_TRACE(acpi_enable_subsystem);
 147
 148 #if (!ACPI_REDUCED_HARDWARE)
 149
 150         /* Enable ACPI mode */
 151
 152         if (!(flags & ACPI_NO_ACPI_ENABLE)) {
 153                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 154                                   "[Init] Going into ACPI mode\n"));
 155
 156                 acpi_gbl_original_mode = acpi_hw_get_mode();
 157
 158                 status = acpi_enable();
 159                 if (ACPI_FAILURE(status)) {
 160                         ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
 161                         return_ACPI_STATUS(status);
 162                 }
 163         }
 164
 165         /*
 166          * Obtain a permanent mapping for the FACS. This is required for the
 167          * Global Lock and the Firmware Waking Vector
 168          */
 169         status = acpi_tb_initialize_facs();
 170         if (ACPI_FAILURE(status)) {
 171                 ACPI_WARNING((AE_INFO, "Could not map the FACS table"));
 172                 return_ACPI_STATUS(status);
 173         }
 174 #endif                          /* !ACPI_REDUCED_HARDWARE */
 175
 176         /*
 177          * Install the default op_region handlers. These are installed unless
 178          * other handlers have already been installed via the
 179          * install_address_space_handler interface.
 180          */
 181         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 182                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 183                                   "[Init] Installing default address space handlers\n"));
 184
 185                 status = acpi_ev_install_region_handlers();
 186                 if (ACPI_FAILURE(status)) {
 187                         return_ACPI_STATUS(status);
 188                 }
 189         }
 190 #if (!ACPI_REDUCED_HARDWARE)
 191         /*
 192          * Initialize ACPI Event handling (Fixed and General Purpose)
 193          *
 194          * Note1: We must have the hardware and events initialized before we can
 195          * execute any control methods safely. Any control method can require
 196          * ACPI hardware support, so the hardware must be fully initialized before
 197          * any method execution!
 198          *
 199          * Note2: Fixed events are initialized and enabled here. GPEs are
 200          * initialized, but cannot be enabled until after the hardware is
 201          * completely initialized (SCI and global_lock activated)
 202          */
 203         if (!(flags & ACPI_NO_EVENT_INIT)) {
 204                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 205                                   "[Init] Initializing ACPI events\n"));
 206
 207                 status = acpi_ev_initialize_events();
 208                 if (ACPI_FAILURE(status)) {
 209                         return_ACPI_STATUS(status);
 210                 }
 211         }
 212
 213         /*
 214          * Install the SCI handler and Global Lock handler. This completes the
 215          * hardware initialization.
 216          */
 217         if (!(flags & ACPI_NO_HANDLER_INIT)) {
 218                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 219                                   "[Init] Installing SCI/GL handlers\n"));
 220
 221                 status = acpi_ev_install_xrupt_handlers();
 222                 if (ACPI_FAILURE(status)) {
 223                         return_ACPI_STATUS(status);
 224                 }
 225         }
 226 #endif                          /* !ACPI_REDUCED_HARDWARE */
 227
 228         return_ACPI_STATUS(status);
 229 }
 230
 231 ACPI_EXPORT_SYMBOL(acpi_enable_subsystem)
 232
 233 /*******************************************************************************
 234  *
 235  * FUNCTION:    acpi_initialize_objects
 236  *
 237  * PARAMETERS:  flags           - Init/enable Options
 238  *
 239  * RETURN:      Status
 240  *
 241  * DESCRIPTION: Completes namespace initialization by initializing device
 242  *              objects and executing AML code for Regions, buffers, etc.
 243  *
 244  ******************************************************************************/
 245 acpi_status acpi_initialize_objects(u32 flags)
 246 {
 247         acpi_status status = AE_OK;
 248
 249         ACPI_FUNCTION_TRACE(acpi_initialize_objects);
 250
 251         /*
 252          * Run all _REG methods
 253          *
 254          * Note: Any objects accessed by the _REG methods will be automatically
 255          * initialized, even if they contain executable AML (see the call to
 256          * acpi_ns_initialize_objects below).
 257          */
 258         if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) {
 259                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 260                                   "[Init] Executing _REG OpRegion methods\n"));
 261
 262                 status = acpi_ev_initialize_op_regions();
 263                 if (ACPI_FAILURE(status)) {
 264                         return_ACPI_STATUS(status);
 265                 }
 266         }
 267
 268         /*
 269          * Execute any module-level code that was detected during the table load
 270          * phase. Although illegal since ACPI 2.0, there are many machines that
 271          * contain this type of code. Each block of detected executable AML code
 272          * outside of any control method is wrapped with a temporary control
 273          * method object and placed on a global list. The methods on this list
 274          * are executed below.
 275          */
 276         acpi_ns_exec_module_code_list();
 277
 278         /*
 279          * Initialize the objects that remain uninitialized. This runs the
 280          * executable AML that may be part of the declaration of these objects:
 281          * operation_regions, buffer_fields, Buffers, and Packages.
 282          */
 283         if (!(flags & ACPI_NO_OBJECT_INIT)) {
 284                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 285                                   "[Init] Completing Initialization of ACPI Objects\n"));
 286
 287                 status = acpi_ns_initialize_objects();
 288                 if (ACPI_FAILURE(status)) {
 289                         return_ACPI_STATUS(status);
 290                 }
 291         }
 292
 293         /*
 294          * Initialize all device objects in the namespace. This runs the device
 295          * _STA and _INI methods.
 296          */
 297         if (!(flags & ACPI_NO_DEVICE_INIT)) {
 298                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 299                                   "[Init] Initializing ACPI Devices\n"));
 300
 301                 status = acpi_ns_initialize_devices();
 302                 if (ACPI_FAILURE(status)) {
 303                         return_ACPI_STATUS(status);
 304                 }
 305         }
 306
 307         /*
 308          * Empty the caches (delete the cached objects) on the assumption that
 309          * the table load filled them up more than they will be at runtime --
 310          * thus wasting non-paged memory.
 311          */
 312         status = acpi_purge_cached_objects();
 313
 314         acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK;
 315         return_ACPI_STATUS(status);
 316 }
 317
 318 ACPI_EXPORT_SYMBOL(acpi_initialize_objects)
 319
 320 #endif
 321 /*******************************************************************************
 322  *
 323  * FUNCTION:    acpi_terminate
 324  *
 325  * PARAMETERS:  None
 326  *
 327  * RETURN:      Status
 328  *
 329  * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
 330  *
 331  ******************************************************************************/
 332 acpi_status acpi_terminate(void)
 333 {
 334         acpi_status status;
 335
 336         ACPI_FUNCTION_TRACE(acpi_terminate);
 337
 338         /* Just exit if subsystem is already shutdown */
 339
 340         if (acpi_gbl_shutdown) {
 341                 ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
 342                 return_ACPI_STATUS(AE_OK);
 343         }
 344
 345         /* Subsystem appears active, go ahead and shut it down */
 346
 347         acpi_gbl_shutdown = TRUE;
 348         acpi_gbl_startup_flags = 0;
 349         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
 350
 351         /* Terminate the AML Debugger if present */
 352
 353         ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE);
 354
 355         /* Shutdown and free all resources */
 356
 357         acpi_ut_subsystem_shutdown();
 358
 359         /* Free the mutex objects */
 360
 361         acpi_ut_mutex_terminate();
 362
 363 #ifdef ACPI_DEBUGGER
 364
 365         /* Shut down the debugger */
 366
 367         acpi_db_terminate();
 368 #endif
 369
 370         /* Now we can shutdown the OS-dependent layer */
 371
 372         status = acpi_os_terminate();
 373         return_ACPI_STATUS(status);
 374 }
 375
 376 ACPI_EXPORT_SYMBOL(acpi_terminate)
 377
 378 #ifndef ACPI_ASL_COMPILER
 379 #ifdef ACPI_FUTURE_USAGE
 380 /*******************************************************************************
 381  *
 382  * FUNCTION:    acpi_subsystem_status
 383  *
 384  * PARAMETERS:  None
 385  *
 386  * RETURN:      Status of the ACPI subsystem
 387  *
 388  * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
 389  *              before making any other calls, to ensure the subsystem
 390  *              initialized successfully.
 391  *
 392  ******************************************************************************/
 393 acpi_status acpi_subsystem_status(void)
 394 {
 395
 396         if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
 397                 return (AE_OK);
 398         } else {
 399                 return (AE_ERROR);
 400         }
 401 }
 402
 403 ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
 404
 405 /*******************************************************************************
 406  *
 407  * FUNCTION:    acpi_get_system_info
 408  *
 409  * PARAMETERS:  out_buffer      - A buffer to receive the resources for the
 410  *                                device
 411  *
 412  * RETURN:      status          - the status of the call
 413  *
 414  * DESCRIPTION: This function is called to get information about the current
 415  *              state of the ACPI subsystem.  It will return system information
 416  *              in the out_buffer.
 417  *
 418  *              If the function fails an appropriate status will be returned
 419  *              and the value of out_buffer is undefined.
 420  *
 421  ******************************************************************************/
 422 acpi_status acpi_get_system_info(struct acpi_buffer * out_buffer)
 423 {
 424         struct acpi_system_info *info_ptr;
 425         acpi_status status;
 426
 427         ACPI_FUNCTION_TRACE(acpi_get_system_info);
 428
 429         /* Parameter validation */
 430
 431         status = acpi_ut_validate_buffer(out_buffer);
 432         if (ACPI_FAILURE(status)) {
 433                 return_ACPI_STATUS(status);
 434         }
 435
 436         /* Validate/Allocate/Clear caller buffer */
 437
 438         status =
 439             acpi_ut_initialize_buffer(out_buffer,
 440                                       sizeof(struct acpi_system_info));
 441         if (ACPI_FAILURE(status)) {
 442                 return_ACPI_STATUS(status);
 443         }
 444
 445         /*
 446          * Populate the return buffer
 447          */
 448         info_ptr = (struct acpi_system_info *)out_buffer->pointer;
 449
 450         info_ptr->acpi_ca_version = ACPI_CA_VERSION;
 451
 452         /* System flags (ACPI capabilities) */
 453
 454         info_ptr->flags = ACPI_SYS_MODE_ACPI;
 455
 456         /* Timer resolution - 24 or 32 bits  */
 457
 458         if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
 459                 info_ptr->timer_resolution = 24;
 460         } else {
 461                 info_ptr->timer_resolution = 32;
 462         }
 463
 464         /* Clear the reserved fields */
 465
 466         info_ptr->reserved1 = 0;
 467         info_ptr->reserved2 = 0;
 468
 469         /* Current debug levels */
 470
 471         info_ptr->debug_layer = acpi_dbg_layer;
 472         info_ptr->debug_level = acpi_dbg_level;
 473
 474         return_ACPI_STATUS(AE_OK);
 475 }
 476
 477 ACPI_EXPORT_SYMBOL(acpi_get_system_info)
 478
 479 /*****************************************************************************
 480  *
 481  * FUNCTION:    acpi_install_initialization_handler
 482  *
 483  * PARAMETERS:  handler             - Callback procedure
 484  *              function            - Not (currently) used, see below
 485  *
 486  * RETURN:      Status
 487  *
 488  * DESCRIPTION: Install an initialization handler
 489  *
 490  * TBD: When a second function is added, must save the Function also.
 491  *
 492  ****************************************************************************/
 493 acpi_status
 494 acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
 495 {
 496
 497         if (!handler) {
 498                 return (AE_BAD_PARAMETER);
 499         }
 500
 501         if (acpi_gbl_init_handler) {
 502                 return (AE_ALREADY_EXISTS);
 503         }
 504
 505         acpi_gbl_init_handler = handler;
 506         return AE_OK;
 507 }
 508
 509 ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
 510 #endif                          /*  ACPI_FUTURE_USAGE  */
 511
 512 /*****************************************************************************
 513  *
 514  * FUNCTION:    acpi_purge_cached_objects
 515  *
 516  * PARAMETERS:  None
 517  *
 518  * RETURN:      Status
 519  *
 520  * DESCRIPTION: Empty all caches (delete the cached objects)
 521  *
 522  ****************************************************************************/
 523 acpi_status acpi_purge_cached_objects(void)
 524 {
 525         ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
 526
 527         (void)acpi_os_purge_cache(acpi_gbl_state_cache);
 528         (void)acpi_os_purge_cache(acpi_gbl_operand_cache);
 529         (void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
 530         (void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
 531         return_ACPI_STATUS(AE_OK);
 532 }
 533
 534 ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
 535
 536 /*****************************************************************************
 537  *
 538  * FUNCTION:    acpi_install_interface
 539  *
 540  * PARAMETERS:  interface_name      - The interface to install
 541  *
 542  * RETURN:      Status
 543  *
 544  * DESCRIPTION: Install an _OSI interface to the global list
 545  *
 546  ****************************************************************************/
 547 acpi_status acpi_install_interface(acpi_string interface_name)
 548 {
 549         acpi_status status;
 550         struct acpi_interface_info *interface_info;
 551
 552         /* Parameter validation */
 553
 554         if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
 555                 return (AE_BAD_PARAMETER);
 556         }
 557
 558         (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 559
 560         /* Check if the interface name is already in the global list */
 561
 562         interface_info = acpi_ut_get_interface(interface_name);
 563         if (interface_info) {
 564                 /*
 565                  * The interface already exists in the list. This is OK if the
 566                  * interface has been marked invalid -- just clear the bit.
 567                  */
 568                 if (interface_info->flags & ACPI_OSI_INVALID) {
 569                         interface_info->flags &= ~ACPI_OSI_INVALID;
 570                         status = AE_OK;
 571                 } else {
 572                         status = AE_ALREADY_EXISTS;
 573                 }
 574         } else {
 575                 /* New interface name, install into the global list */
 576
 577                 status = acpi_ut_install_interface(interface_name);
 578         }
 579
 580         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 581         return (status);
 582 }
 583
 584 ACPI_EXPORT_SYMBOL(acpi_install_interface)
 585
 586 /*****************************************************************************
 587  *
 588  * FUNCTION:    acpi_remove_interface
 589  *
 590  * PARAMETERS:  interface_name      - The interface to remove
 591  *
 592  * RETURN:      Status
 593  *
 594  * DESCRIPTION: Remove an _OSI interface from the global list
 595  *
 596  ****************************************************************************/
 597 acpi_status acpi_remove_interface(acpi_string interface_name)
 598 {
 599         acpi_status status;
 600
 601         /* Parameter validation */
 602
 603         if (!interface_name || (ACPI_STRLEN(interface_name) == 0)) {
 604                 return (AE_BAD_PARAMETER);
 605         }
 606
 607         (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 608
 609         status = acpi_ut_remove_interface(interface_name);
 610
 611         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 612         return (status);
 613 }
 614
 615 ACPI_EXPORT_SYMBOL(acpi_remove_interface)
 616
 617 /*****************************************************************************
 618  *
 619  * FUNCTION:    acpi_install_interface_handler
 620  *
 621  * PARAMETERS:  handler             - The _OSI interface handler to install
 622  *                                    NULL means "remove existing handler"
 623  *
 624  * RETURN:      Status
 625  *
 626  * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
 627  *              invoked during execution of the internal implementation of
 628  *              _OSI. A NULL handler simply removes any existing handler.
 629  *
 630  ****************************************************************************/
 631 acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
 632 {
 633         acpi_status status = AE_OK;
 634
 635         (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
 636
 637         if (handler && acpi_gbl_interface_handler) {
 638                 status = AE_ALREADY_EXISTS;
 639         } else {
 640                 acpi_gbl_interface_handler = handler;
 641         }
 642
 643         acpi_os_release_mutex(acpi_gbl_osi_mutex);
 644         return (status);
 645 }
 646
 647 ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
 648
 649 /*****************************************************************************
 650  *
 651  * FUNCTION:    acpi_check_address_range
 652  *
 653  * PARAMETERS:  space_id            - Address space ID
 654  *              address             - Start address
 655  *              length              - Length
 656  *              warn                - TRUE if warning on overlap desired
 657  *
 658  * RETURN:      Count of the number of conflicts detected.
 659  *
 660  * DESCRIPTION: Check if the input address range overlaps any of the
 661  *              ASL operation region address ranges.
 662  *
 663  ****************************************************************************/
 664 u32
 665 acpi_check_address_range(acpi_adr_space_type space_id,
 666                          acpi_physical_address address,
 667                          acpi_size length, u8 warn)
 668 {
 669         u32 overlaps;
 670         acpi_status status;
 671
 672         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
 673         if (ACPI_FAILURE(status)) {
 674                 return (0);
 675         }
 676
 677         overlaps = acpi_ut_check_address_range(space_id, address,
 678                                                (u32)length, warn);
 679
 680         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 681         return (overlaps);
 682 }
 683
 684 ACPI_EXPORT_SYMBOL(acpi_check_address_range)
 685 #endif                          /* !ACPI_ASL_COMPILER */