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