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  1. /******************************************************************************
  2.  *
  3.  * Module Name: nsload - namespace loading/expanding/contracting procedures
  4.  *
  5.  *****************************************************************************/
  6.  
  7. /******************************************************************************
  8.  *
  9.  * 1. Copyright Notice
  10.  *
  11.  * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
  12.  * All rights reserved.
  13.  *
  14.  * 2. License
  15.  *
  16.  * 2.1. This is your license from Intel Corp. under its intellectual property
  17.  * rights.  You may have additional license terms from the party that provided
  18.  * you this software, covering your right to use that party's intellectual
  19.  * property rights.
  20.  *
  21.  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  22.  * copy of the source code appearing in this file ("Covered Code") an
  23.  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  24.  * base code distributed originally by Intel ("Original Intel Code") to copy,
  25.  * make derivatives, distribute, use and display any portion of the Covered
  26.  * Code in any form, with the right to sublicense such rights; and
  27.  *
  28.  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  29.  * license (with the right to sublicense), under only those claims of Intel
  30.  * patents that are infringed by the Original Intel Code, to make, use, sell,
  31.  * offer to sell, and import the Covered Code and derivative works thereof
  32.  * solely to the minimum extent necessary to exercise the above copyright
  33.  * license, and in no event shall the patent license extend to any additions
  34.  * to or modifications of the Original Intel Code.  No other license or right
  35.  * is granted directly or by implication, estoppel or otherwise;
  36.  *
  37.  * The above copyright and patent license is granted only if the following
  38.  * conditions are met:
  39.  *
  40.  * 3. Conditions
  41.  *
  42.  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  43.  * Redistribution of source code of any substantial portion of the Covered
  44.  * Code or modification with rights to further distribute source must include
  45.  * the above Copyright Notice, the above License, this list of Conditions,
  46.  * and the following Disclaimer and Export Compliance provision.  In addition,
  47.  * Licensee must cause all Covered Code to which Licensee contributes to
  48.  * contain a file documenting the changes Licensee made to create that Covered
  49.  * Code and the date of any change.  Licensee must include in that file the
  50.  * documentation of any changes made by any predecessor Licensee.  Licensee
  51.  * must include a prominent statement that the modification is derived,
  52.  * directly or indirectly, from Original Intel Code.
  53.  *
  54.  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  55.  * Redistribution of source code of any substantial portion of the Covered
  56.  * Code or modification without rights to further distribute source must
  57.  * include the following Disclaimer and Export Compliance provision in the
  58.  * documentation and/or other materials provided with distribution.  In
  59.  * addition, Licensee may not authorize further sublicense of source of any
  60.  * portion of the Covered Code, and must include terms to the effect that the
  61.  * license from Licensee to its licensee is limited to the intellectual
  62.  * property embodied in the software Licensee provides to its licensee, and
  63.  * not to intellectual property embodied in modifications its licensee may
  64.  * make.
  65.  *
  66.  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  67.  * substantial portion of the Covered Code or modification must reproduce the
  68.  * above Copyright Notice, and the following Disclaimer and Export Compliance
  69.  * provision in the documentation and/or other materials provided with the
  70.  * distribution.
  71.  *
  72.  * 3.4. Intel retains all right, title, and interest in and to the Original
  73.  * Intel Code.
  74.  *
  75.  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  76.  * Intel shall be used in advertising or otherwise to promote the sale, use or
  77.  * other dealings in products derived from or relating to the Covered Code
  78.  * without prior written authorization from Intel.
  79.  *
  80.  * 4. Disclaimer and Export Compliance
  81.  *
  82.  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  83.  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  84.  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  85.  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  86.  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  87.  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  88.  * PARTICULAR PURPOSE.
  89.  *
  90.  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  91.  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  92.  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  93.  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  94.  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  95.  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  96.  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  97.  * LIMITED REMEDY.
  98.  *
  99.  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  100.  * software or system incorporating such software without first obtaining any
  101.  * required license or other approval from the U. S. Department of Commerce or
  102.  * any other agency or department of the United States Government.  In the
  103.  * event Licensee exports any such software from the United States or
  104.  * re-exports any such software from a foreign destination, Licensee shall
  105.  * ensure that the distribution and export/re-export of the software is in
  106.  * compliance with all laws, regulations, orders, or other restrictions of the
  107.  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  108.  * any of its subsidiaries will export/re-export any technical data, process,
  109.  * software, or service, directly or indirectly, to any country for which the
  110.  * United States government or any agency thereof requires an export license,
  111.  * other governmental approval, or letter of assurance, without first obtaining
  112.  * such license, approval or letter.
  113.  *
  114.  *****************************************************************************/
  115.  
  116. #define __NSLOAD_C__
  117.  
  118. #include "acpi.h"
  119. #include "accommon.h"
  120. #include "acnamesp.h"
  121. #include "acdispat.h"
  122. #include "actables.h"
  123.  
  124.  
  125. #define _COMPONENT          ACPI_NAMESPACE
  126.         ACPI_MODULE_NAME    ("nsload")
  127.  
  128. /* Local prototypes */
  129.  
  130. #ifdef ACPI_FUTURE_IMPLEMENTATION
  131. ACPI_STATUS
  132. AcpiNsUnloadNamespace (
  133.     ACPI_HANDLE             Handle);
  134.  
  135. static ACPI_STATUS
  136. AcpiNsDeleteSubtree (
  137.     ACPI_HANDLE             StartHandle);
  138. #endif
  139.  
  140.  
  141. #ifndef ACPI_NO_METHOD_EXECUTION
  142. /*******************************************************************************
  143.  *
  144.  * FUNCTION:    AcpiNsLoadTable
  145.  *
  146.  * PARAMETERS:  TableIndex      - Index for table to be loaded
  147.  *              Node            - Owning NS node
  148.  *
  149.  * RETURN:      Status
  150.  *
  151.  * DESCRIPTION: Load one ACPI table into the namespace
  152.  *
  153.  ******************************************************************************/
  154.  
  155. ACPI_STATUS
  156. AcpiNsLoadTable (
  157.     UINT32                  TableIndex,
  158.     ACPI_NAMESPACE_NODE     *Node)
  159. {
  160.     ACPI_STATUS             Status;
  161.  
  162.  
  163.     ACPI_FUNCTION_TRACE (NsLoadTable);
  164.  
  165.  
  166.     /*
  167.      * Parse the table and load the namespace with all named
  168.      * objects found within.  Control methods are NOT parsed
  169.      * at this time.  In fact, the control methods cannot be
  170.      * parsed until the entire namespace is loaded, because
  171.      * if a control method makes a forward reference (call)
  172.      * to another control method, we can't continue parsing
  173.      * because we don't know how many arguments to parse next!
  174.      */
  175.     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
  176.     if (ACPI_FAILURE (Status))
  177.     {
  178.         return_ACPI_STATUS (Status);
  179.     }
  180.  
  181.     /* If table already loaded into namespace, just return */
  182.  
  183.     if (AcpiTbIsTableLoaded (TableIndex))
  184.     {
  185.         Status = AE_ALREADY_EXISTS;
  186.         goto Unlock;
  187.     }
  188.  
  189.     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
  190.         "**** Loading table into namespace ****\n"));
  191.  
  192.     Status = AcpiTbAllocateOwnerId (TableIndex);
  193.     if (ACPI_FAILURE (Status))
  194.     {
  195.         goto Unlock;
  196.     }
  197.  
  198.     Status = AcpiNsParseTable (TableIndex, Node);
  199.     if (ACPI_SUCCESS (Status))
  200.     {
  201.         AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
  202.     }
  203.     else
  204.     {
  205.         (void) AcpiTbReleaseOwnerId (TableIndex);
  206.     }
  207.  
  208. Unlock:
  209.     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
  210.  
  211.     if (ACPI_FAILURE (Status))
  212.     {
  213.         return_ACPI_STATUS (Status);
  214.     }
  215.  
  216.     /*
  217.      * Now we can parse the control methods.  We always parse
  218.      * them here for a sanity check, and if configured for
  219.      * just-in-time parsing, we delete the control method
  220.      * parse trees.
  221.      */
  222.     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
  223.         "**** Begin Table Method Parsing and Object Initialization\n"));
  224.  
  225.     Status = AcpiDsInitializeObjects (TableIndex, Node);
  226.  
  227.     ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
  228.         "**** Completed Table Method Parsing and Object Initialization\n"));
  229.  
  230.     return_ACPI_STATUS (Status);
  231. }
  232.  
  233.  
  234. #ifdef ACPI_OBSOLETE_FUNCTIONS
  235. /*******************************************************************************
  236.  *
  237.  * FUNCTION:    AcpiLoadNamespace
  238.  *
  239.  * PARAMETERS:  None
  240.  *
  241.  * RETURN:      Status
  242.  *
  243.  * DESCRIPTION: Load the name space from what ever is pointed to by DSDT.
  244.  *              (DSDT points to either the BIOS or a buffer.)
  245.  *
  246.  ******************************************************************************/
  247.  
  248. ACPI_STATUS
  249. AcpiNsLoadNamespace (
  250.     void)
  251. {
  252.     ACPI_STATUS             Status;
  253.  
  254.  
  255.     ACPI_FUNCTION_TRACE (AcpiLoadNameSpace);
  256.  
  257.  
  258.     /* There must be at least a DSDT installed */
  259.  
  260.     if (AcpiGbl_DSDT == NULL)
  261.     {
  262.         ACPI_ERROR ((AE_INFO, "DSDT is not in memory"));
  263.         return_ACPI_STATUS (AE_NO_ACPI_TABLES);
  264.     }
  265.  
  266.     /*
  267.      * Load the namespace.  The DSDT is required,
  268.      * but the SSDT and PSDT tables are optional.
  269.      */
  270.     Status = AcpiNsLoadTableByType (ACPI_TABLE_ID_DSDT);
  271.     if (ACPI_FAILURE (Status))
  272.     {
  273.         return_ACPI_STATUS (Status);
  274.     }
  275.  
  276.     /* Ignore exceptions from these */
  277.  
  278.     (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_SSDT);
  279.     (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_PSDT);
  280.  
  281.     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
  282.         "ACPI Namespace successfully loaded at root %p\n",
  283.         AcpiGbl_RootNode));
  284.  
  285.     return_ACPI_STATUS (Status);
  286. }
  287. #endif
  288.  
  289. #ifdef ACPI_FUTURE_IMPLEMENTATION
  290. /*******************************************************************************
  291.  *
  292.  * FUNCTION:    AcpiNsDeleteSubtree
  293.  *
  294.  * PARAMETERS:  StartHandle         - Handle in namespace where search begins
  295.  *
  296.  * RETURNS      Status
  297.  *
  298.  * DESCRIPTION: Walks the namespace starting at the given handle and deletes
  299.  *              all objects, entries, and scopes in the entire subtree.
  300.  *
  301.  *              Namespace/Interpreter should be locked or the subsystem should
  302.  *              be in shutdown before this routine is called.
  303.  *
  304.  ******************************************************************************/
  305.  
  306. static ACPI_STATUS
  307. AcpiNsDeleteSubtree (
  308.     ACPI_HANDLE             StartHandle)
  309. {
  310.     ACPI_STATUS             Status;
  311.     ACPI_HANDLE             ChildHandle;
  312.     ACPI_HANDLE             ParentHandle;
  313.     ACPI_HANDLE             NextChildHandle;
  314.     ACPI_HANDLE             Dummy;
  315.     UINT32                  Level;
  316.  
  317.  
  318.     ACPI_FUNCTION_TRACE (NsDeleteSubtree);
  319.  
  320.  
  321.     ParentHandle = StartHandle;
  322.     ChildHandle  = NULL;
  323.     Level        = 1;
  324.  
  325.     /*
  326.      * Traverse the tree of objects until we bubble back up
  327.      * to where we started.
  328.      */
  329.     while (Level > 0)
  330.     {
  331.         /* Attempt to get the next object in this scope */
  332.  
  333.         Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle,
  334.                                     ChildHandle, &NextChildHandle);
  335.  
  336.         ChildHandle = NextChildHandle;
  337.  
  338.         /* Did we get a new object? */
  339.  
  340.         if (ACPI_SUCCESS (Status))
  341.         {
  342.             /* Check if this object has any children */
  343.  
  344.             if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle,
  345.                                     NULL, &Dummy)))
  346.             {
  347.                 /*
  348.                  * There is at least one child of this object,
  349.                  * visit the object
  350.                  */
  351.                 Level++;
  352.                 ParentHandle = ChildHandle;
  353.                 ChildHandle  = NULL;
  354.             }
  355.         }
  356.         else
  357.         {
  358.             /*
  359.              * No more children in this object, go back up to
  360.              * the object's parent
  361.              */
  362.             Level--;
  363.  
  364.             /* Delete all children now */
  365.  
  366.             AcpiNsDeleteChildren (ChildHandle);
  367.  
  368.             ChildHandle = ParentHandle;
  369.             Status = AcpiGetParent (ParentHandle, &ParentHandle);
  370.             if (ACPI_FAILURE (Status))
  371.             {
  372.                 return_ACPI_STATUS (Status);
  373.             }
  374.         }
  375.     }
  376.  
  377.     /* Now delete the starting object, and we are done */
  378.  
  379.     AcpiNsRemoveNode (ChildHandle);
  380.     return_ACPI_STATUS (AE_OK);
  381. }
  382.  
  383.  
  384. /*******************************************************************************
  385.  *
  386.  *  FUNCTION:       AcpiNsUnloadNameSpace
  387.  *
  388.  *  PARAMETERS:     Handle          - Root of namespace subtree to be deleted
  389.  *
  390.  *  RETURN:         Status
  391.  *
  392.  *  DESCRIPTION:    Shrinks the namespace, typically in response to an undocking
  393.  *                  event.  Deletes an entire subtree starting from (and
  394.  *                  including) the given handle.
  395.  *
  396.  ******************************************************************************/
  397.  
  398. ACPI_STATUS
  399. AcpiNsUnloadNamespace (
  400.     ACPI_HANDLE             Handle)
  401. {
  402.     ACPI_STATUS             Status;
  403.  
  404.  
  405.     ACPI_FUNCTION_TRACE (NsUnloadNameSpace);
  406.  
  407.  
  408.     /* Parameter validation */
  409.  
  410.     if (!AcpiGbl_RootNode)
  411.     {
  412.         return_ACPI_STATUS (AE_NO_NAMESPACE);
  413.     }
  414.  
  415.     if (!Handle)
  416.     {
  417.         return_ACPI_STATUS (AE_BAD_PARAMETER);
  418.     }
  419.  
  420.     /* This function does the real work */
  421.  
  422.     Status = AcpiNsDeleteSubtree (Handle);
  423.  
  424.     return_ACPI_STATUS (Status);
  425. }
  426. #endif
  427. #endif
  428.  
  429.