acpica/utilities/utxfinit.c

/******************************************************************************
 *
 * Module Name: utxfinit - External interfaces for ACPICA initialization
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999 - 2018, 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.
 *
 *****************************************************************************
 *
 * Alternatively, you may choose to be licensed under the terms of the
 * following license:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, you may choose to be licensed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 *****************************************************************************/

#define EXPORT_ACPI_INTERFACES

#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    ("utxfinit")

/* For AcpiExec only */
void
AeDoObjectOverrides (
    void);


/*******************************************************************************
 *
 * 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 ACPI_INIT_FUNCTION
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);
    }

    /* Initialize the global OSI interfaces list with the static names */

    Status = AcpiUtInitializeInterfaces ();
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "During OSI interfaces initialization"));
        return_ACPI_STATUS (Status);
    }

    return_ACPI_STATUS (AE_OK);
}

ACPI_EXPORT_SYMBOL_INIT (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 ACPI_INIT_FUNCTION
AcpiEnableSubsystem (
    UINT32                  Flags)
{
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE (AcpiEnableSubsystem);


    /*
     * The early initialization phase is complete. The namespace is loaded,
     * and we can now support address spaces other than Memory, I/O, and
     * PCI_Config.
     */
    AcpiGbl_EarlyInitialization = FALSE;

#if (!ACPI_REDUCED_HARDWARE)

    /* 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
     */
    if (!(Flags & ACPI_NO_FACS_INIT))
    {
        Status = AcpiTbInitializeFacs ();
        if (ACPI_FAILURE (Status))
        {
            ACPI_WARNING ((AE_INFO, "Could not map the FACS table"));
            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);
        }
    }

#endif /* !ACPI_REDUCED_HARDWARE */

    return_ACPI_STATUS (Status);
}

ACPI_EXPORT_SYMBOL_INIT (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 ACPI_INIT_FUNCTION
AcpiInitializeObjects (
    UINT32                  Flags)
{
    ACPI_STATUS             Status = AE_OK;


    ACPI_FUNCTION_TRACE (AcpiInitializeObjects);


    /*
     * This case handles the legacy option that groups all module-level
     * code blocks together and defers execution until all of the tables
     * are loaded. Execute all of these blocks at this time.
     * Execute any module-level code that was detected during the table
     * load phase.
     *
     * Note: this option is deprecated and will be eliminated in the
     * future. Use of this option can cause problems with AML code that
     * depends upon in-order immediate execution of module-level code.
     */
    AcpiNsExecModuleCodeList ();

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

    /*
     * Initialize all device/region objects in the namespace. This runs
     * the device _STA and _INI methods and region _REG methods.
     */
    if (!(Flags & (ACPI_NO_DEVICE_INIT | ACPI_NO_ADDRESS_SPACE_INIT)))
    {
        Status = AcpiNsInitializeDevices (Flags);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (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_INIT (AcpiInitializeObjects)