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/******************************************************************************

 *

 * Module Name: nsload - namespace loading/expanding/contracting procedures

 *

 *****************************************************************************/

/******************************************************************************

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2010, 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 __NSLOAD_C__

#include "acpi.h"

#include "accommon.h"

#include "acnamesp.h"

#include "acdispat.h"

#include "actables.h"

#define _COMPONENT          ACPI_NAMESPACE

        ACPI_MODULE_NAME    ("nsload")

/* Local prototypes */

#ifdef ACPI_FUTURE_IMPLEMENTATION

ACPI_STATUS

AcpiNsUnloadNamespace (

    ACPI_HANDLE             Handle);

static ACPI_STATUS

AcpiNsDeleteSubtree (

    ACPI_HANDLE             StartHandle);

#endif

#ifndef ACPI_NO_METHOD_EXECUTION

/*******************************************************************************

 *

 * FUNCTION:    AcpiNsLoadTable

 *

 * PARAMETERS:  TableIndex      - Index for table to be loaded

 *              Node            - Owning NS node

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Load one ACPI table into the namespace

 *

 ******************************************************************************/

ACPI_STATUS

AcpiNsLoadTable (

    UINT32                  TableIndex,

    ACPI_NAMESPACE_NODE     *Node)

{

    ACPI_STATUS             Status;

    ACPI_FUNCTION_TRACE (NsLoadTable);

    /*

     * Parse the table and load the namespace with all named

     * objects found within.  Control methods are NOT parsed

     * at this time.  In fact, the control methods cannot be

     * parsed until the entire namespace is loaded, because

     * if a control method makes a forward reference (call)

     * to another control method, we can't continue parsing

     * because we don't know how many arguments to parse next!

     */

    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /* If table already loaded into namespace, just return */

    if (AcpiTbIsTableLoaded (TableIndex))

    {

        Status = AE_ALREADY_EXISTS;

        goto Unlock;

    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,

        "**** Loading table into namespace ****\n"));

    Status = AcpiTbAllocateOwnerId (TableIndex);

    if (ACPI_FAILURE (Status))

    {

        goto Unlock;

    }

    Status = AcpiNsParseTable (TableIndex, Node);

    if (ACPI_SUCCESS (Status))

    {

        AcpiTbSetTableLoadedFlag (TableIndex, TRUE);

    }

    else

    {

        (void) AcpiTbReleaseOwnerId (TableIndex);

    }

Unlock:

    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /*

     * Now we can parse the control methods.  We always parse

     * them here for a sanity check, and if configured for

     * just-in-time parsing, we delete the control method

     * parse trees.

     */

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,

        "**** Begin Table Method Parsing and Object Initialization\n"));

    Status = AcpiDsInitializeObjects (TableIndex, Node);

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,

        "**** Completed Table Method Parsing and Object Initialization\n"));

    return_ACPI_STATUS (Status);

}

#ifdef ACPI_OBSOLETE_FUNCTIONS

/*******************************************************************************

 *

 * FUNCTION:    AcpiLoadNamespace

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Load the name space from what ever is pointed to by DSDT.

 *              (DSDT points to either the BIOS or a buffer.)

 *

 ******************************************************************************/

ACPI_STATUS

AcpiNsLoadNamespace (

    void)

{

    ACPI_STATUS             Status;

    ACPI_FUNCTION_TRACE (AcpiLoadNameSpace);

    /* There must be at least a DSDT installed */

    if (AcpiGbl_DSDT == NULL)

    {

        ACPI_ERROR ((AE_INFO, "DSDT is not in memory"));

        return_ACPI_STATUS (AE_NO_ACPI_TABLES);

    }

    /*

     * Load the namespace.  The DSDT is required,

     * but the SSDT and PSDT tables are optional.

     */

    Status = AcpiNsLoadTableByType (ACPI_TABLE_ID_DSDT);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /* Ignore exceptions from these */

    (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_SSDT);

    (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_PSDT);

    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,

        "ACPI Namespace successfully loaded at root %p\n",

        AcpiGbl_RootNode));

    return_ACPI_STATUS (Status);

}

#endif

#ifdef ACPI_FUTURE_IMPLEMENTATION

/*******************************************************************************

 *

 * FUNCTION:    AcpiNsDeleteSubtree

 *

 * PARAMETERS:  StartHandle         - Handle in namespace where search begins

 *

 * RETURNS      Status

 *

 * DESCRIPTION: Walks the namespace starting at the given handle and deletes

 *              all objects, entries, and scopes in the entire subtree.

 *

 *              Namespace/Interpreter should be locked or the subsystem should

 *              be in shutdown before this routine is called.

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiNsDeleteSubtree (

    ACPI_HANDLE             StartHandle)

{

    ACPI_STATUS             Status;

    ACPI_HANDLE             ChildHandle;

    ACPI_HANDLE             ParentHandle;

    ACPI_HANDLE             NextChildHandle;

    ACPI_HANDLE             Dummy;

    UINT32                  Level;

    ACPI_FUNCTION_TRACE (NsDeleteSubtree);

    ParentHandle = StartHandle;

    ChildHandle  = NULL;

    Level        = 1;

    /*

     * Traverse the tree of objects until we bubble back up

     * to where we started.

     */

    while (Level > 0)

    {

        /* Attempt to get the next object in this scope */

        Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle,

                                    ChildHandle, &NextChildHandle);

        ChildHandle = NextChildHandle;

        /* Did we get a new object? */

        if (ACPI_SUCCESS (Status))

        {

            /* Check if this object has any children */

            if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle,

                                    NULL, &Dummy)))

            {

                /*

                 * There is at least one child of this object,

                 * visit the object

                 */

                Level++;

                ParentHandle = ChildHandle;

                ChildHandle  = NULL;

            }

        }

        else

        {

            /*

             * No more children in this object, go back up to

             * the object's parent

             */

            Level--;

            /* Delete all children now */

            AcpiNsDeleteChildren (ChildHandle);

            ChildHandle = ParentHandle;

            Status = AcpiGetParent (ParentHandle, &ParentHandle);

            if (ACPI_FAILURE (Status))

            {

                return_ACPI_STATUS (Status);

            }

        }

    }

    /* Now delete the starting object, and we are done */

    AcpiNsRemoveNode (ChildHandle);

    return_ACPI_STATUS (AE_OK);

}

/*******************************************************************************

 *

 *  FUNCTION:       AcpiNsUnloadNameSpace

 *

 *  PARAMETERS:     Handle          - Root of namespace subtree to be deleted

 *

 *  RETURN:         Status

 *

 *  DESCRIPTION:    Shrinks the namespace, typically in response to an undocking

 *                  event.  Deletes an entire subtree starting from (and

 *                  including) the given handle.

 *

 ******************************************************************************/

ACPI_STATUS

AcpiNsUnloadNamespace (

    ACPI_HANDLE             Handle)

{

    ACPI_STATUS             Status;

    ACPI_FUNCTION_TRACE (NsUnloadNameSpace);

    /* Parameter validation */

    if (!AcpiGbl_RootNode)

    {

        return_ACPI_STATUS (AE_NO_NAMESPACE);

    }

    if (!Handle)

    {

        return_ACPI_STATUS (AE_BAD_PARAMETER);

    }

    /* This function does the real work */

    Status = AcpiNsDeleteSubtree (Handle);

    return_ACPI_STATUS (Status);

}

#endif

#endif