components/utilities/utxface.c

/******************************************************************************
 *
 * Module Name: utxface - External interfaces for "global" ACPI functions
 *              $Revision: 77 $
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 "acevents.h"
#include "achware.h"
#include "acnamesp.h"
#include "acinterp.h"
#include "amlcode.h"
#include "acdebug.h"
#include "acexcep.h"


#define _COMPONENT          ACPI_UTILITIES
        MODULE_NAME         ("utxface")


/*******************************************************************************
 *
 * 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;

    FUNCTION_TRACE ("AcpiInitializeSubsystem");


    /* Initialize all globals used by the subsystem */

    AcpiUtInitGlobals ();

    /* Initialize the OS-Dependent layer */

    Status = AcpiOsInitialize ();
    if (ACPI_FAILURE (Status))
    {
        REPORT_ERROR (("OSD failed to initialize, %s\n",
            AcpiFormatException (Status)));
        return_ACPI_STATUS (Status);
    }

    /* Create the default mutex objects */

    Status = AcpiUtMutexInitialize ();
    if (ACPI_FAILURE (Status))
    {
        REPORT_ERROR (("Global mutex creation failure, %s\n",
            AcpiFormatException (Status)));
        return_ACPI_STATUS (Status);
    }

    /*
     * Initialize the namespace manager and
     * the root of the namespace tree
     */

    Status = AcpiNsRootInitialize ();
    if (ACPI_FAILURE (Status))
    {
        REPORT_ERROR (("Namespace initialization failure, %s\n",
            AcpiFormatException (Status)));
        return_ACPI_STATUS (Status);
    }


    /* If configured, initialize the AML debugger */

    DEBUGGER_EXEC (AcpiDbInitialize ());

    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * 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;


    FUNCTION_TRACE ("AcpiEnableSubsystem");


    /* Sanity check the FADT for valid values */

    Status = AcpiUtValidateFadt ();
    if (ACPI_FAILURE (Status))
    {
        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 = AcpiEvInstallDefaultAddressSpaceHandlers ();
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }

    /*
     * We must initialize the hardware before we can enable ACPI.
     */

    if (!(Flags & ACPI_NO_HARDWARE_INIT))
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI hardware\n"));

        Status = AcpiHwInitialize ();
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }

    /*
     * Enable ACPI on this platform
     */

    if (!(Flags & ACPI_NO_ACPI_ENABLE))
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n"));

        Status = AcpiEnable ();
        if (ACPI_FAILURE (Status))
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "AcpiEnable failed.\n"));
            return_ACPI_STATUS (Status);
        }
    }

    /*
     * Note:
     * 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 initialized before execution!
     */

    if (!(Flags & ACPI_NO_EVENT_INIT))
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI events\n"));

        Status = AcpiEvInitialize ();
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }


    /*
     * Initialize all device objects in the namespace
     * This runs the _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 objects that remain uninitialized.  This
     * runs the executable AML that is part of the declaration of OpRegions
     * and Fields.
     */

    if (!(Flags & ACPI_NO_OBJECT_INIT))
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI Objects\n"));

        Status = AcpiNsInitializeObjects ();
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }

    AcpiGbl_StartupFlags |= ACPI_INITIALIZED_OK;

    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiTerminate
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Shutdown the ACPI subsystem.  Release all resources.
 *
 ******************************************************************************/

ACPI_STATUS
AcpiTerminate (void)
{
    ACPI_STATUS             Status;


    FUNCTION_TRACE ("AcpiTerminate");


    /* Ensure that ACPI has been initialized */

    ACPI_IS_INITIALIZATION_COMPLETE (Status);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Terminate the AML Debugger if present */

    DEBUGGER_EXEC(AcpiGbl_DbTerminateThreads = TRUE);

    /* TBD: [Investigate] This is no longer needed?*/
/*    AcpiUtReleaseMutex (ACPI_MTX_DEBUG_CMD_READY); */


    /* Shutdown and free all resources */

    AcpiUtSubsystemShutdown ();


    /* Free the mutex objects */

    AcpiUtMutexTerminate ();


    /* Now we can shutdown the OS-dependent layer */

    AcpiOsTerminate ();

    return_ACPI_STATUS (AE_OK);
}


/*****************************************************************************
 *
 * 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 initial-
 *              ized successfully.
 *
 ****************************************************************************/

ACPI_STATUS
AcpiSubsystemStatus (void)
{
    if (AcpiGbl_StartupFlags & ACPI_INITIALIZED_OK)
    {
        return (AE_OK);
    }
    else
    {
        return (AE_ERROR);
    }
}


/******************************************************************************
 *
 * FUNCTION:    AcpiGetSystemInfo
 *
 * PARAMETERS:  OutBuffer       - a pointer to a buffer to receive the
 *                                resources for the device
 *              BufferLength    - the number of bytes available in the buffer
 *
 * 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;
    UINT32                  i;
    ACPI_STATUS             Status;


    FUNCTION_TRACE ("AcpiGetSystemInfo");


    /* Ensure that ACPI has been initialized */

    ACPI_IS_INITIALIZATION_COMPLETE (Status);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     *  Must have a valid buffer
     */
    if ((!OutBuffer)          ||
        (!OutBuffer->Pointer))
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    if (OutBuffer->Length < sizeof (ACPI_SYSTEM_INFO))
    {
        /*
         *  Caller's buffer is too small
         */
        OutBuffer->Length = sizeof (ACPI_SYSTEM_INFO);

        return_ACPI_STATUS (AE_BUFFER_OVERFLOW);
    }


    /*
     *  Set return length and get data
     */
    OutBuffer->Length = sizeof (ACPI_SYSTEM_INFO);
    InfoPtr = (ACPI_SYSTEM_INFO *) OutBuffer->Pointer;

    InfoPtr->AcpiCaVersion      = ACPI_CA_VERSION;

    /* System flags (ACPI capabilities) */

    InfoPtr->Flags              = AcpiGbl_SystemFlags;

    /* Timer resolution - 24 or 32 bits  */
    if (!AcpiGbl_FADT)
    {
        InfoPtr->TimerResolution = 0;
    }
    else if (AcpiGbl_FADT->TmrValExt == 0)
    {
        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;

    /* Current status of the ACPI tables, per table type */

    InfoPtr->NumTableTypes = NUM_ACPI_TABLES;
    for (i = 0; i < NUM_ACPI_TABLES; i++)
    {
        InfoPtr->TableInfo[i].Count = AcpiGbl_AcpiTables[i].Count;
    }

    return_ACPI_STATUS (AE_OK);
}