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 /******************************************************************************
  *
  * Module Name: utxface - External interfaces for "global" ACPI functions
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
  * All rights reserved.
  *
  * 2. License
  *
  * 2.1. This is your license from Intel Corp. under its intellectual property
  * rights.  You may have additional license terms from the party that provided
  * you this software, covering your right to use that party's intellectual
  * property rights.
  *
  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  * copy of the source code appearing in this file ("Covered Code") an
  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  * base code distributed originally by Intel ("Original Intel Code") to copy,
  * make derivatives, distribute, use and display any portion of the Covered
  * Code in any form, with the right to sublicense such rights; and
  *
  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  * license (with the right to sublicense), under only those claims of Intel
  * patents that are infringed by the Original Intel Code, to make, use, sell,
  * offer to sell, and import the Covered Code and derivative works thereof
  * solely to the minimum extent necessary to exercise the above copyright
  * license, and in no event shall the patent license extend to any additions
  * to or modifications of the Original Intel Code.  No other license or right
  * is granted directly or by implication, estoppel or otherwise;
  *
  * The above copyright and patent license is granted only if the following
  * conditions are met:
  *
  * 3. Conditions
  *
  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification with rights to further distribute source must include
  * the above Copyright Notice, the above License, this list of Conditions,
  * and the following Disclaimer and Export Compliance provision.  In addition,
  * Licensee must cause all Covered Code to which Licensee contributes to
  * contain a file documenting the changes Licensee made to create that Covered
  * Code and the date of any change.  Licensee must include in that file the
  * documentation of any changes made by any predecessor Licensee.  Licensee
  * must include a prominent statement that the modification is derived,
  * directly or indirectly, from Original Intel Code.
  *
  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification without rights to further distribute source must
  * include the following Disclaimer and Export Compliance provision in the
  * documentation and/or other materials provided with distribution.  In
  * addition, Licensee may not authorize further sublicense of source of any
  * portion of the Covered Code, and must include terms to the effect that the
  * license from Licensee to its licensee is limited to the intellectual
  * property embodied in the software Licensee provides to its licensee, and
  * not to intellectual property embodied in modifications its licensee may
  * make.
  *
  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  * substantial portion of the Covered Code or modification must reproduce the
  * above Copyright Notice, and the following Disclaimer and Export Compliance
  * provision in the documentation and/or other materials provided with the
  * distribution.
  *
  * 3.4. Intel retains all right, title, and interest in and to the Original
  * Intel Code.
  *
  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  * Intel shall be used in advertising or otherwise to promote the sale, use or
  * other dealings in products derived from or relating to the Covered Code
  * without prior written authorization from Intel.
  *
  * 4. Disclaimer and Export Compliance
  *
  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  * PARTICULAR PURPOSE.
  *
  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  * LIMITED REMEDY.
  *
  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  * software or system incorporating such software without first obtaining any
  * required license or other approval from the U. S. Department of Commerce or
  * any other agency or department of the United States Government.  In the
  * event Licensee exports any such software from the United States or
  * re-exports any such software from a foreign destination, Licensee shall
  * ensure that the distribution and export/re-export of the software is in
  * compliance with all laws, regulations, orders, or other restrictions of the
  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  * any of its subsidiaries will export/re-export any technical data, process,
  * software, or service, directly or indirectly, to any country for which the
  * United States government or any agency thereof requires an export license,
  * other governmental approval, or letter of assurance, without first obtaining
  * such license, approval or letter.
  *
  *****************************************************************************/
 
 
 #define __UTXFACE_C__
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acevents.h"
 #include "acnamesp.h"
 #include "acdebug.h"
 #include "actables.h"
 
 #define _COMPONENT          ACPI_UTILITIES
         ACPI_MODULE_NAME    ("utxface")
 
 
 #ifndef ACPI_ASL_COMPILER
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiInitializeSubsystem
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Initializes all global variables.  This is the first function
  *              called, so any early initialization belongs here.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiInitializeSubsystem (
     void)
 {
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_TRACE (AcpiInitializeSubsystem);
 
 
     AcpiGbl_StartupFlags = ACPI_SUBSYSTEM_INITIALIZE;
     ACPI_DEBUG_EXEC (AcpiUtInitStackPtrTrace ());
 
     /* Initialize the OS-Dependent layer */
 
     Status = AcpiOsInitialize ();
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status, "During OSL initialization"));
         return_ACPI_STATUS (Status);
     }
 
     /* Initialize all globals used by the subsystem */
 
     Status = AcpiUtInitGlobals ();
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status, "During initialization of globals"));
         return_ACPI_STATUS (Status);
     }
 
     /* Create the default mutex objects */
 
     Status = AcpiUtMutexInitialize ();
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status, "During Global Mutex creation"));
         return_ACPI_STATUS (Status);
     }
 
     /*
      * Initialize the namespace manager and
      * the root of the namespace tree
      */
     Status = AcpiNsRootInitialize ();
     if (ACPI_FAILURE (Status))
     {
         ACPI_EXCEPTION ((AE_INFO, Status, "During Namespace initialization"));
         return_ACPI_STATUS (Status);
     }
 
     /* If configured, initialize the AML debugger */
 
     ACPI_DEBUGGER_EXEC (Status = AcpiDbInitialize ());
     return_ACPI_STATUS (Status);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiInitializeSubsystem)
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiEnableSubsystem
  *
  * PARAMETERS:  Flags           - Init/enable Options
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Completes the subsystem initialization including hardware.
  *              Puts system into ACPI mode if it isn't already.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiEnableSubsystem (
     UINT32                  Flags)
 {
     ACPI_STATUS             Status = AE_OK;
 
 
     ACPI_FUNCTION_TRACE (AcpiEnableSubsystem);
 
 
     /* Enable ACPI mode */
 
     if (!(Flags & ACPI_NO_ACPI_ENABLE))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));
 
         AcpiGbl_OriginalMode = AcpiHwGetMode();
 
         Status = AcpiEnable ();
         if (ACPI_FAILURE (Status))
         {
             ACPI_WARNING ((AE_INFO, "AcpiEnable failed"));
             return_ACPI_STATUS (Status);
         }
     }
 
     /*
      * Obtain a permanent mapping for the FACS. This is required for the
      * Global Lock and the Firmware Waking Vector
      */
     Status = AcpiTbInitializeFacs ();
     if (ACPI_FAILURE (Status))
     {
         ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
         return_ACPI_STATUS (Status);
     }
 
     /*
      * Install the default OpRegion handlers.  These are installed unless
      * other handlers have already been installed via the
      * InstallAddressSpaceHandler interface.
      */
     if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "[Init] Installing default address space handlers\n"));
 
         Status = AcpiEvInstallRegionHandlers ();
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
     }
 
     /*
      * Initialize ACPI Event handling (Fixed and General Purpose)
      *
      * Note1: We must have the hardware and events initialized before we can
      * execute any control methods safely. Any control method can require
      * ACPI hardware support, so the hardware must be fully initialized before
      * any method execution!
      *
      * Note2: Fixed events are initialized and enabled here. GPEs are
      * initialized, but cannot be enabled until after the hardware is
      * completely initialized (SCI and GlobalLock activated) and the various
      * initialization control methods are run (_REG, _STA, _INI) on the
      * entire namespace.
      */
     if (!(Flags & ACPI_NO_EVENT_INIT))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "[Init] Initializing ACPI events\n"));
 
         Status = AcpiEvInitializeEvents ();
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
     }
 
     /*
      * Install the SCI handler and Global Lock handler. This completes the
      * hardware initialization.
      */
     if (!(Flags & ACPI_NO_HANDLER_INIT))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "[Init] Installing SCI/GL handlers\n"));
 
         Status = AcpiEvInstallXruptHandlers ();
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
     }
 
     return_ACPI_STATUS (Status);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiEnableSubsystem)
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiInitializeObjects
  *
  * PARAMETERS:  Flags           - Init/enable Options
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Completes namespace initialization by initializing device
  *              objects and executing AML code for Regions, buffers, etc.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiInitializeObjects (
     UINT32                  Flags)
 {
     ACPI_STATUS             Status = AE_OK;
 
 
     ACPI_FUNCTION_TRACE (AcpiInitializeObjects);
 
 
     /*
      * Run all _REG methods
      *
      * Note: Any objects accessed by the _REG methods will be automatically
      * initialized, even if they contain executable AML (see the call to
      * AcpiNsInitializeObjects below).
      */
     if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "[Init] Executing _REG OpRegion methods\n"));
 
         Status = AcpiEvInitializeOpRegions ();
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
     }
 
     /*
      * Initialize the objects that remain uninitialized. This runs the
      * executable AML that may be part of the declaration of these objects:
      * OperationRegions, BufferFields, Buffers, and Packages.
      */
     if (!(Flags & ACPI_NO_OBJECT_INIT))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "[Init] Completing Initialization of ACPI Objects\n"));
 
         Status = AcpiNsInitializeObjects ();
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
     }
 
     /*
      * Initialize all device objects in the namespace. This runs the device
      * _STA and _INI methods.
      */
     if (!(Flags & ACPI_NO_DEVICE_INIT))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
             "[Init] Initializing ACPI Devices\n"));
 
         Status = AcpiNsInitializeDevices ();
         if (ACPI_FAILURE (Status))
         {
             return_ACPI_STATUS (Status);
         }
     }
 
     /*
      * Initialize the GPE blocks defined in the FADT (GPE block 0 and 1).
      * The runtime GPEs are enabled here.
      *
      * This is where the _PRW methods are executed for the GPEs. These
      * methods can only be executed after the SCI and Global Lock handlers are
      * installed and initialized.
      *
      * GPEs can only be enabled after the _REG, _STA, and _INI methods have
      * been run. This ensures that all Operation Regions and all Devices have
      * been initialized and are ready.
      */
     if (!(Flags & ACPI_NO_EVENT_INIT))
     {
         Status = AcpiEvInstallFadtGpes ();
         if (ACPI_FAILURE (Status))
         {
             return (Status);
         }
     }
 
     /*
      * Empty the caches (delete the cached objects) on the assumption that
      * the table load filled them up more than they will be at runtime --
      * thus wasting non-paged memory.
      */
     Status = AcpiPurgeCachedObjects ();
 
     AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK;
     return_ACPI_STATUS (Status);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiInitializeObjects)
 
 
 #endif
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiTerminate
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Shutdown the ACPI subsystem.  Release all resources.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiTerminate (
     void)
 {
     ACPI_STATUS         Status;
 
 
     ACPI_FUNCTION_TRACE (AcpiTerminate);
 
 
     /* Terminate the AML Debugger if present */
 
     ACPI_DEBUGGER_EXEC(AcpiGbl_DbTerminateThreads = TRUE);
 
     /* Shutdown and free all resources */
 
     AcpiUtSubsystemShutdown ();
 
 
     /* Free the mutex objects */
 
     AcpiUtMutexTerminate ();
 
 
 #ifdef ACPI_DEBUGGER
 
     /* Shut down the debugger */
 
     AcpiDbTerminate ();
 #endif
 
     /* Now we can shutdown the OS-dependent layer */
 
     Status = AcpiOsTerminate ();
     return_ACPI_STATUS (Status);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiTerminate)
 
 #ifndef ACPI_ASL_COMPILER
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiSubsystemStatus
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status of the ACPI subsystem
  *
  * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
  *              before making any other calls, to ensure the subsystem
  *              initialized successfully.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiSubsystemStatus (
     void)
 {
 
     if (AcpiGbl_StartupFlags & ACPI_INITIALIZED_OK)
     {
         return (AE_OK);
     }
     else
     {
         return (AE_ERROR);
     }
 }
 
 ACPI_EXPORT_SYMBOL (AcpiSubsystemStatus)
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiGetSystemInfo
  *
  * PARAMETERS:  OutBuffer       - A buffer to receive the resources for the
  *                                device
  *
  * RETURN:      Status          - the status of the call
  *
  * DESCRIPTION: This function is called to get information about the current
  *              state of the ACPI subsystem.  It will return system information
  *              in the OutBuffer.
  *
  *              If the function fails an appropriate status will be returned
  *              and the value of OutBuffer is undefined.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiGetSystemInfo (
     ACPI_BUFFER             *OutBuffer)
 {
     ACPI_SYSTEM_INFO        *InfoPtr;
     ACPI_STATUS             Status;
 
 
     ACPI_FUNCTION_TRACE (AcpiGetSystemInfo);
 
 
     /* Parameter validation */
 
     Status = AcpiUtValidateBuffer (OutBuffer);
     if (ACPI_FAILURE (Status))
     {
         return_ACPI_STATUS (Status);
     }
 
     /* Validate/Allocate/Clear caller buffer */
 
     Status = AcpiUtInitializeBuffer (OutBuffer, sizeof (ACPI_SYSTEM_INFO));
     if (ACPI_FAILURE (Status))
     {
         return_ACPI_STATUS (Status);
     }
 
     /*
      * Populate the return buffer
      */
     InfoPtr = (ACPI_SYSTEM_INFO *) OutBuffer->Pointer;
 
     InfoPtr->AcpiCaVersion = ACPI_CA_VERSION;
 
     /* System flags (ACPI capabilities) */
 
     InfoPtr->Flags = ACPI_SYS_MODE_ACPI;
 
     /* Timer resolution - 24 or 32 bits  */
 
     if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER)
     {
         InfoPtr->TimerResolution = 24;
     }
     else
     {
         InfoPtr->TimerResolution = 32;
     }
 
     /* Clear the reserved fields */
 
     InfoPtr->Reserved1 = 0;
     InfoPtr->Reserved2 = 0;
 
     /* Current debug levels */
 
     InfoPtr->DebugLayer = AcpiDbgLayer;
     InfoPtr->DebugLevel = AcpiDbgLevel;
 
     return_ACPI_STATUS (AE_OK);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiGetSystemInfo)
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiGetStatistics
  *
  * PARAMETERS:  Stats           - Where the statistics are returned
  *
  * RETURN:      Status          - the status of the call
  *
  * DESCRIPTION: Get the contents of the various system counters
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiGetStatistics (
     ACPI_STATISTICS         *Stats)
 {
     ACPI_FUNCTION_TRACE (AcpiGetStatistics);
 
 
     /* Parameter validation */
 
     if (!Stats)
     {
         return_ACPI_STATUS (AE_BAD_PARAMETER);
     }
 
     /* Various interrupt-based event counters */
 
     Stats->SciCount = AcpiSciCount;
     Stats->GpeCount = AcpiGpeCount;
 
     ACPI_MEMCPY (Stats->FixedEventCount, AcpiFixedEventCount,
         sizeof (AcpiFixedEventCount));
 
 
     /* Other counters */
 
     Stats->MethodCount = AcpiMethodCount;
 
     return_ACPI_STATUS (AE_OK);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiGetStatistics)
 
 
 /*****************************************************************************
  *
  * FUNCTION:    AcpiInstallInitializationHandler
  *
  * PARAMETERS:  Handler             - Callback procedure
  *              Function            - Not (currently) used, see below
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Install an initialization handler
  *
  * TBD: When a second function is added, must save the Function also.
  *
  ****************************************************************************/
 
 ACPI_STATUS
 AcpiInstallInitializationHandler (
     ACPI_INIT_HANDLER       Handler,
     UINT32                  Function)
 {
 
     if (!Handler)
     {
         return (AE_BAD_PARAMETER);
     }
 
     if (AcpiGbl_InitHandler)
     {
         return (AE_ALREADY_EXISTS);
     }
 
     AcpiGbl_InitHandler = Handler;
     return AE_OK;
 }
 
 ACPI_EXPORT_SYMBOL (AcpiInstallInitializationHandler)
 
 
 /*****************************************************************************
  *
  * FUNCTION:    AcpiPurgeCachedObjects
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Empty all caches (delete the cached objects)
  *
  ****************************************************************************/
 
 ACPI_STATUS
 AcpiPurgeCachedObjects (
     void)
 {
     ACPI_FUNCTION_TRACE (AcpiPurgeCachedObjects);
 
     (void) AcpiOsPurgeCache (AcpiGbl_StateCache);
     (void) AcpiOsPurgeCache (AcpiGbl_OperandCache);
     (void) AcpiOsPurgeCache (AcpiGbl_PsNodeCache);
     (void) AcpiOsPurgeCache (AcpiGbl_PsNodeExtCache);
     return_ACPI_STATUS (AE_OK);
 }
 
 ACPI_EXPORT_SYMBOL (AcpiPurgeCachedObjects)
 
 #endif /* ACPI_ASL_COMPILER */