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 45 #define __UTXFACE_C__ 46 47 #include <contrib/dev/acpica/include/acpi.h> 48 #include <contrib/dev/acpica/include/accommon.h> 49 #include <contrib/dev/acpica/include/acevents.h> 50 #include <contrib/dev/acpica/include/acnamesp.h> 51 #include <contrib/dev/acpica/include/acdebug.h> 52 #include <contrib/dev/acpica/include/actables.h> 53 54 #define _COMPONENT ACPI_UTILITIES 55 ACPI_MODULE_NAME ("utxface") 56 57 58 #ifndef ACPI_ASL_COMPILER 59 /******************************************************************************* 60 * 61 * FUNCTION: AcpiInitializeSubsystem 62 * 63 * PARAMETERS: None 64 * 65 * RETURN: Status 66 * 67 * DESCRIPTION: Initializes all global variables. This is the first function 68 * called, so any early initialization belongs here. 69 * 70 ******************************************************************************/ 71 72 ACPI_STATUS 73 AcpiInitializeSubsystem ( 74 void) 75 { 76 ACPI_STATUS Status; 77 78 79 ACPI_FUNCTION_TRACE (AcpiInitializeSubsystem); 80 81 82 AcpiGbl_StartupFlags = ACPI_SUBSYSTEM_INITIALIZE; 83 ACPI_DEBUG_EXEC (AcpiUtInitStackPtrTrace ()); 84 85 /* Initialize the OS-Dependent layer */ 86 87 Status = AcpiOsInitialize (); 88 if (ACPI_FAILURE (Status)) 89 { 90 ACPI_EXCEPTION ((AE_INFO, Status, "During OSL initialization")); 91 return_ACPI_STATUS (Status); 92 } 93 94 /* Initialize all globals used by the subsystem */ 95 96 Status = AcpiUtInitGlobals (); 97 if (ACPI_FAILURE (Status)) 98 { 99 ACPI_EXCEPTION ((AE_INFO, Status, "During initialization of globals")); 100 return_ACPI_STATUS (Status); 101 } 102 103 /* Create the default mutex objects */ 104 105 Status = AcpiUtMutexInitialize (); 106 if (ACPI_FAILURE (Status)) 107 { 108 ACPI_EXCEPTION ((AE_INFO, Status, "During Global Mutex creation")); 109 return_ACPI_STATUS (Status); 110 } 111 112 /* 113 * Initialize the namespace manager and 114 * the root of the namespace tree 115 */ 116 Status = AcpiNsRootInitialize (); 117 if (ACPI_FAILURE (Status)) 118 { 119 ACPI_EXCEPTION ((AE_INFO, Status, "During Namespace initialization")); 120 return_ACPI_STATUS (Status); 121 } 122 123 /* Initialize the global OSI interfaces list with the static names */ 124 125 Status = AcpiUtInitializeInterfaces (); 126 if (ACPI_FAILURE (Status)) 127 { 128 ACPI_EXCEPTION ((AE_INFO, Status, "During OSI interfaces initialization")); 129 return_ACPI_STATUS (Status); 130 } 131 132 /* If configured, initialize the AML debugger */ 133 134 ACPI_DEBUGGER_EXEC (Status = AcpiDbInitialize ()); 135 return_ACPI_STATUS (Status); 136 } 137 138 ACPI_EXPORT_SYMBOL (AcpiInitializeSubsystem) 139 140 141 /******************************************************************************* 142 * 143 * FUNCTION: AcpiEnableSubsystem 144 * 145 * PARAMETERS: Flags - Init/enable Options 146 * 147 * RETURN: Status 148 * 149 * DESCRIPTION: Completes the subsystem initialization including hardware. 150 * Puts system into ACPI mode if it isn't already. 151 * 152 ******************************************************************************/ 153 154 ACPI_STATUS 155 AcpiEnableSubsystem ( 156 UINT32 Flags) 157 { 158 ACPI_STATUS Status = AE_OK; 159 160 161 ACPI_FUNCTION_TRACE (AcpiEnableSubsystem); 162 163 164 #if (!ACPI_REDUCED_HARDWARE) 165 166 /* Enable ACPI mode */ 167 168 if (!(Flags & ACPI_NO_ACPI_ENABLE)) 169 { 170 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n")); 171 172 AcpiGbl_OriginalMode = AcpiHwGetMode(); 173 174 Status = AcpiEnable (); 175 if (ACPI_FAILURE (Status)) 176 { 177 ACPI_WARNING ((AE_INFO, "AcpiEnable failed")); 178 return_ACPI_STATUS (Status); 179 } 180 } 181 182 /* 183 * Obtain a permanent mapping for the FACS. This is required for the 184 * Global Lock and the Firmware Waking Vector 185 */ 186 Status = AcpiTbInitializeFacs (); 187 if (ACPI_FAILURE (Status)) 188 { 189 ACPI_WARNING ((AE_INFO, "Could not map the FACS table")); 190 return_ACPI_STATUS (Status); 191 } 192 193 #endif /* !ACPI_REDUCED_HARDWARE */ 194 195 /* 196 * Install the default OpRegion handlers. These are installed unless 197 * other handlers have already been installed via the 198 * InstallAddressSpaceHandler interface. 199 */ 200 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT)) 201 { 202 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 203 "[Init] Installing default address space handlers\n")); 204 205 Status = AcpiEvInstallRegionHandlers (); 206 if (ACPI_FAILURE (Status)) 207 { 208 return_ACPI_STATUS (Status); 209 } 210 } 211 212 #if (!ACPI_REDUCED_HARDWARE) 213 /* 214 * Initialize ACPI Event handling (Fixed and General Purpose) 215 * 216 * Note1: We must have the hardware and events initialized before we can 217 * execute any control methods safely. Any control method can require 218 * ACPI hardware support, so the hardware must be fully initialized before 219 * any method execution! 220 * 221 * Note2: Fixed events are initialized and enabled here. GPEs are 222 * initialized, but cannot be enabled until after the hardware is 223 * completely initialized (SCI and GlobalLock activated) and the various 224 * initialization control methods are run (_REG, _STA, _INI) on the 225 * entire namespace. 226 */ 227 if (!(Flags & ACPI_NO_EVENT_INIT)) 228 { 229 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 230 "[Init] Initializing ACPI events\n")); 231 232 Status = AcpiEvInitializeEvents (); 233 if (ACPI_FAILURE (Status)) 234 { 235 return_ACPI_STATUS (Status); 236 } 237 } 238 239 /* 240 * Install the SCI handler and Global Lock handler. This completes the 241 * hardware initialization. 242 */ 243 if (!(Flags & ACPI_NO_HANDLER_INIT)) 244 { 245 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 246 "[Init] Installing SCI/GL handlers\n")); 247 248 Status = AcpiEvInstallXruptHandlers (); 249 if (ACPI_FAILURE (Status)) 250 { 251 return_ACPI_STATUS (Status); 252 } 253 } 254 255 #endif /* !ACPI_REDUCED_HARDWARE */ 256 257 return_ACPI_STATUS (Status); 258 } 259 260 ACPI_EXPORT_SYMBOL (AcpiEnableSubsystem) 261 262 263 /******************************************************************************* 264 * 265 * FUNCTION: AcpiInitializeObjects 266 * 267 * PARAMETERS: Flags - Init/enable Options 268 * 269 * RETURN: Status 270 * 271 * DESCRIPTION: Completes namespace initialization by initializing device 272 * objects and executing AML code for Regions, buffers, etc. 273 * 274 ******************************************************************************/ 275 276 ACPI_STATUS 277 AcpiInitializeObjects ( 278 UINT32 Flags) 279 { 280 ACPI_STATUS Status = AE_OK; 281 282 283 ACPI_FUNCTION_TRACE (AcpiInitializeObjects); 284 285 286 /* 287 * Run all _REG methods 288 * 289 * Note: Any objects accessed by the _REG methods will be automatically 290 * initialized, even if they contain executable AML (see the call to 291 * AcpiNsInitializeObjects below). 292 */ 293 if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT)) 294 { 295 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 296 "[Init] Executing _REG OpRegion methods\n")); 297 298 Status = AcpiEvInitializeOpRegions (); 299 if (ACPI_FAILURE (Status)) 300 { 301 return_ACPI_STATUS (Status); 302 } 303 } 304 305 /* 306 * Execute any module-level code that was detected during the table load 307 * phase. Although illegal since ACPI 2.0, there are many machines that 308 * contain this type of code. Each block of detected executable AML code 309 * outside of any control method is wrapped with a temporary control 310 * method object and placed on a global list. The methods on this list 311 * are executed below. 312 */ 313 AcpiNsExecModuleCodeList (); 314 315 /* 316 * Initialize the objects that remain uninitialized. This runs the 317 * executable AML that may be part of the declaration of these objects: 318 * OperationRegions, BufferFields, Buffers, and Packages. 319 */ 320 if (!(Flags & ACPI_NO_OBJECT_INIT)) 321 { 322 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 323 "[Init] Completing Initialization of ACPI Objects\n")); 324 325 Status = AcpiNsInitializeObjects (); 326 if (ACPI_FAILURE (Status)) 327 { 328 return_ACPI_STATUS (Status); 329 } 330 } 331 332 /* 333 * Initialize all device objects in the namespace. This runs the device 334 * _STA and _INI methods. 335 */ 336 if (!(Flags & ACPI_NO_DEVICE_INIT)) 337 { 338 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 339 "[Init] Initializing ACPI Devices\n")); 340 341 Status = AcpiNsInitializeDevices (); 342 if (ACPI_FAILURE (Status)) 343 { 344 return_ACPI_STATUS (Status); 345 } 346 } 347 348 /* 349 * Empty the caches (delete the cached objects) on the assumption that 350 * the table load filled them up more than they will be at runtime -- 351 * thus wasting non-paged memory. 352 */ 353 Status = AcpiPurgeCachedObjects (); 354 355 AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK; 356 return_ACPI_STATUS (Status); 357 } 358 359 ACPI_EXPORT_SYMBOL (AcpiInitializeObjects) 360 361 362 #endif 363 364 /******************************************************************************* 365 * 366 * FUNCTION: AcpiTerminate 367 * 368 * PARAMETERS: None 369 * 370 * RETURN: Status 371 * 372 * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources. 373 * 374 ******************************************************************************/ 375 376 ACPI_STATUS 377 AcpiTerminate ( 378 void) 379 { 380 ACPI_STATUS Status; 381 382 383 ACPI_FUNCTION_TRACE (AcpiTerminate); 384 385 386 /* Just exit if subsystem is already shutdown */ 387 388 if (AcpiGbl_Shutdown) 389 { 390 ACPI_ERROR ((AE_INFO, "ACPI Subsystem is already terminated")); 391 return_ACPI_STATUS (AE_OK); 392 } 393 394 /* Subsystem appears active, go ahead and shut it down */ 395 396 AcpiGbl_Shutdown = TRUE; 397 AcpiGbl_StartupFlags = 0; 398 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n")); 399 400 /* Terminate the AML Debugger if present */ 401 402 ACPI_DEBUGGER_EXEC (AcpiGbl_DbTerminateThreads = TRUE); 403 404 /* Shutdown and free all resources */ 405 406 AcpiUtSubsystemShutdown (); 407 408 /* Free the mutex objects */ 409 410 AcpiUtMutexTerminate (); 411 412 413 #ifdef ACPI_DEBUGGER 414 415 /* Shut down the debugger */ 416 417 AcpiDbTerminate (); 418 #endif 419 420 /* Now we can shutdown the OS-dependent layer */ 421 422 Status = AcpiOsTerminate (); 423 return_ACPI_STATUS (Status); 424 } 425 426 ACPI_EXPORT_SYMBOL (AcpiTerminate) 427 428 429 #ifndef ACPI_ASL_COMPILER 430 /******************************************************************************* 431 * 432 * FUNCTION: AcpiSubsystemStatus 433 * 434 * PARAMETERS: None 435 * 436 * RETURN: Status of the ACPI subsystem 437 * 438 * DESCRIPTION: Other drivers that use the ACPI subsystem should call this 439 * before making any other calls, to ensure the subsystem 440 * initialized successfully. 441 * 442 ******************************************************************************/ 443 444 ACPI_STATUS 445 AcpiSubsystemStatus ( 446 void) 447 { 448 449 if (AcpiGbl_StartupFlags & ACPI_INITIALIZED_OK) 450 { 451 return (AE_OK); 452 } 453 else 454 { 455 return (AE_ERROR); 456 } 457 } 458 459 ACPI_EXPORT_SYMBOL (AcpiSubsystemStatus) 460 461 462 /******************************************************************************* 463 * 464 * FUNCTION: AcpiGetSystemInfo 465 * 466 * PARAMETERS: OutBuffer - A buffer to receive the resources for the 467 * device 468 * 469 * RETURN: Status - the status of the call 470 * 471 * DESCRIPTION: This function is called to get information about the current 472 * state of the ACPI subsystem. It will return system information 473 * in the OutBuffer. 474 * 475 * If the function fails an appropriate status will be returned 476 * and the value of OutBuffer is undefined. 477 * 478 ******************************************************************************/ 479 480 ACPI_STATUS 481 AcpiGetSystemInfo ( 482 ACPI_BUFFER *OutBuffer) 483 { 484 ACPI_SYSTEM_INFO *InfoPtr; 485 ACPI_STATUS Status; 486 487 488 ACPI_FUNCTION_TRACE (AcpiGetSystemInfo); 489 490 491 /* Parameter validation */ 492 493 Status = AcpiUtValidateBuffer (OutBuffer); 494 if (ACPI_FAILURE (Status)) 495 { 496 return_ACPI_STATUS (Status); 497 } 498 499 /* Validate/Allocate/Clear caller buffer */ 500 501 Status = AcpiUtInitializeBuffer (OutBuffer, sizeof (ACPI_SYSTEM_INFO)); 502 if (ACPI_FAILURE (Status)) 503 { 504 return_ACPI_STATUS (Status); 505 } 506 507 /* 508 * Populate the return buffer 509 */ 510 InfoPtr = (ACPI_SYSTEM_INFO *) OutBuffer->Pointer; 511 512 InfoPtr->AcpiCaVersion = ACPI_CA_VERSION; 513 514 /* System flags (ACPI capabilities) */ 515 516 InfoPtr->Flags = ACPI_SYS_MODE_ACPI; 517 518 /* Timer resolution - 24 or 32 bits */ 519 520 if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 521 { 522 InfoPtr->TimerResolution = 24; 523 } 524 else 525 { 526 InfoPtr->TimerResolution = 32; 527 } 528 529 /* Clear the reserved fields */ 530 531 InfoPtr->Reserved1 = 0; 532 InfoPtr->Reserved2 = 0; 533 534 /* Current debug levels */ 535 536 InfoPtr->DebugLayer = AcpiDbgLayer; 537 InfoPtr->DebugLevel = AcpiDbgLevel; 538 539 return_ACPI_STATUS (AE_OK); 540 } 541 542 ACPI_EXPORT_SYMBOL (AcpiGetSystemInfo) 543 544 545 /******************************************************************************* 546 * 547 * FUNCTION: AcpiGetStatistics 548 * 549 * PARAMETERS: Stats - Where the statistics are returned 550 * 551 * RETURN: Status - the status of the call 552 * 553 * DESCRIPTION: Get the contents of the various system counters 554 * 555 ******************************************************************************/ 556 557 ACPI_STATUS 558 AcpiGetStatistics ( 559 ACPI_STATISTICS *Stats) 560 { 561 ACPI_FUNCTION_TRACE (AcpiGetStatistics); 562 563 564 /* Parameter validation */ 565 566 if (!Stats) 567 { 568 return_ACPI_STATUS (AE_BAD_PARAMETER); 569 } 570 571 /* Various interrupt-based event counters */ 572 573 Stats->SciCount = AcpiSciCount; 574 Stats->GpeCount = AcpiGpeCount; 575 576 ACPI_MEMCPY (Stats->FixedEventCount, AcpiFixedEventCount, 577 sizeof (AcpiFixedEventCount)); 578 579 580 /* Other counters */ 581 582 Stats->MethodCount = AcpiMethodCount; 583 584 return_ACPI_STATUS (AE_OK); 585 } 586 587 ACPI_EXPORT_SYMBOL (AcpiGetStatistics) 588 589 590 /***************************************************************************** 591 * 592 * FUNCTION: AcpiInstallInitializationHandler 593 * 594 * PARAMETERS: Handler - Callback procedure 595 * Function - Not (currently) used, see below 596 * 597 * RETURN: Status 598 * 599 * DESCRIPTION: Install an initialization handler 600 * 601 * TBD: When a second function is added, must save the Function also. 602 * 603 ****************************************************************************/ 604 605 ACPI_STATUS 606 AcpiInstallInitializationHandler ( 607 ACPI_INIT_HANDLER Handler, 608 UINT32 Function) 609 { 610 611 if (!Handler) 612 { 613 return (AE_BAD_PARAMETER); 614 } 615 616 if (AcpiGbl_InitHandler) 617 { 618 return (AE_ALREADY_EXISTS); 619 } 620 621 AcpiGbl_InitHandler = Handler; 622 return AE_OK; 623 } 624 625 ACPI_EXPORT_SYMBOL (AcpiInstallInitializationHandler) 626 627 628 /***************************************************************************** 629 * 630 * FUNCTION: AcpiPurgeCachedObjects 631 * 632 * PARAMETERS: None 633 * 634 * RETURN: Status 635 * 636 * DESCRIPTION: Empty all caches (delete the cached objects) 637 * 638 ****************************************************************************/ 639 640 ACPI_STATUS 641 AcpiPurgeCachedObjects ( 642 void) 643 { 644 ACPI_FUNCTION_TRACE (AcpiPurgeCachedObjects); 645 646 (void) AcpiOsPurgeCache (AcpiGbl_StateCache); 647 (void) AcpiOsPurgeCache (AcpiGbl_OperandCache); 648 (void) AcpiOsPurgeCache (AcpiGbl_PsNodeCache); 649 (void) AcpiOsPurgeCache (AcpiGbl_PsNodeExtCache); 650 return_ACPI_STATUS (AE_OK); 651 } 652 653 ACPI_EXPORT_SYMBOL (AcpiPurgeCachedObjects) 654 655 656 /***************************************************************************** 657 * 658 * FUNCTION: AcpiInstallInterface 659 * 660 * PARAMETERS: InterfaceName - The interface to install 661 * 662 * RETURN: Status 663 * 664 * DESCRIPTION: Install an _OSI interface to the global list 665 * 666 ****************************************************************************/ 667 668 ACPI_STATUS 669 AcpiInstallInterface ( 670 ACPI_STRING InterfaceName) 671 { 672 ACPI_STATUS Status; 673 ACPI_INTERFACE_INFO *InterfaceInfo; 674 675 676 /* Parameter validation */ 677 678 if (!InterfaceName || (ACPI_STRLEN (InterfaceName) == 0)) 679 { 680 return (AE_BAD_PARAMETER); 681 } 682 683 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 684 685 /* Check if the interface name is already in the global list */ 686 687 InterfaceInfo = AcpiUtGetInterface (InterfaceName); 688 if (InterfaceInfo) 689 { 690 /* 691 * The interface already exists in the list. This is OK if the 692 * interface has been marked invalid -- just clear the bit. 693 */ 694 if (InterfaceInfo->Flags & ACPI_OSI_INVALID) 695 { 696 InterfaceInfo->Flags &= ~ACPI_OSI_INVALID; 697 Status = AE_OK; 698 } 699 else 700 { 701 Status = AE_ALREADY_EXISTS; 702 } 703 } 704 else 705 { 706 /* New interface name, install into the global list */ 707 708 Status = AcpiUtInstallInterface (InterfaceName); 709 } 710 711 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 712 return (Status); 713 } 714 715 ACPI_EXPORT_SYMBOL (AcpiInstallInterface) 716 717 718 /***************************************************************************** 719 * 720 * FUNCTION: AcpiRemoveInterface 721 * 722 * PARAMETERS: InterfaceName - The interface to remove 723 * 724 * RETURN: Status 725 * 726 * DESCRIPTION: Remove an _OSI interface from the global list 727 * 728 ****************************************************************************/ 729 730 ACPI_STATUS 731 AcpiRemoveInterface ( 732 ACPI_STRING InterfaceName) 733 { 734 ACPI_STATUS Status; 735 736 737 /* Parameter validation */ 738 739 if (!InterfaceName || (ACPI_STRLEN (InterfaceName) == 0)) 740 { 741 return (AE_BAD_PARAMETER); 742 } 743 744 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 745 746 Status = AcpiUtRemoveInterface (InterfaceName); 747 748 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 749 return (Status); 750 } 751 752 ACPI_EXPORT_SYMBOL (AcpiRemoveInterface) 753 754 755 /***************************************************************************** 756 * 757 * FUNCTION: AcpiInstallInterfaceHandler 758 * 759 * PARAMETERS: Handler - The _OSI interface handler to install 760 * NULL means "remove existing handler" 761 * 762 * RETURN: Status 763 * 764 * DESCRIPTION: Install a handler for the predefined _OSI ACPI method. 765 * invoked during execution of the internal implementation of 766 * _OSI. A NULL handler simply removes any existing handler. 767 * 768 ****************************************************************************/ 769 770 ACPI_STATUS 771 AcpiInstallInterfaceHandler ( 772 ACPI_INTERFACE_HANDLER Handler) 773 { 774 ACPI_STATUS Status = AE_OK; 775 776 777 (void) AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER); 778 779 if (Handler && AcpiGbl_InterfaceHandler) 780 { 781 Status = AE_ALREADY_EXISTS; 782 } 783 else 784 { 785 AcpiGbl_InterfaceHandler = Handler; 786 } 787 788 AcpiOsReleaseMutex (AcpiGbl_OsiMutex); 789 return (Status); 790 } 791 792 ACPI_EXPORT_SYMBOL (AcpiInstallInterfaceHandler) 793 794 795 /***************************************************************************** 796 * 797 * FUNCTION: AcpiCheckAddressRange 798 * 799 * PARAMETERS: SpaceId - Address space ID 800 * Address - Start address 801 * Length - Length 802 * Warn - TRUE if warning on overlap desired 803 * 804 * RETURN: Count of the number of conflicts detected. 805 * 806 * DESCRIPTION: Check if the input address range overlaps any of the 807 * ASL operation region address ranges. 808 * 809 ****************************************************************************/ 810 811 UINT32 812 AcpiCheckAddressRange ( 813 ACPI_ADR_SPACE_TYPE SpaceId, 814 ACPI_PHYSICAL_ADDRESS Address, 815 ACPI_SIZE Length, 816 BOOLEAN Warn) 817 { 818 UINT32 Overlaps; 819 ACPI_STATUS Status; 820 821 822 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 823 if (ACPI_FAILURE (Status)) 824 { 825 return (0); 826 } 827 828 Overlaps = AcpiUtCheckAddressRange (SpaceId, Address, 829 (UINT32) Length, Warn); 830 831 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 832 return (Overlaps); 833 } 834 835 ACPI_EXPORT_SYMBOL (AcpiCheckAddressRange) 836 837 #endif /* !ACPI_ASL_COMPILER */ 838