text: /******************************************************************************
   *
   * Module Name: tbxfload - Table load/unload external interfaces
   *
   *****************************************************************************/
  
  /******************************************************************************
   *
   * 1. Copyright Notice
   *
   * Some or all of this work - Copyright (c) 1999 - 2013, 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 __TBXFLOAD_C__
  
  #include "acpi.h"
  #include "accommon.h"
  #include "acnamesp.h"
  #include "actables.h"
  
  #define _COMPONENT          ACPI_TABLES
          ACPI_MODULE_NAME    ("tbxfload")
  
  /* Local prototypes */
  
  static ACPI_STATUS
  AcpiTbLoadNamespace (
      void);
  
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiLoadTables
   *
   * PARAMETERS:  None
   *
   * RETURN:      Status
   *
   * DESCRIPTION: Load the ACPI tables from the RSDT/XSDT
   *
   ******************************************************************************/
  
  ACPI_STATUS
  AcpiLoadTables (
      void)
  {
      ACPI_STATUS             Status;
  
  
      ACPI_FUNCTION_TRACE (AcpiLoadTables);
  
  
      /* Load the namespace from the tables */
  
      Status = AcpiTbLoadNamespace ();
      if (ACPI_FAILURE (Status))
      {
          ACPI_EXCEPTION ((AE_INFO, Status,
              "While loading namespace from ACPI tables"));
      }
  
      return_ACPI_STATUS (Status);
  }
  
  ACPI_EXPORT_SYMBOL (AcpiLoadTables)
  
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiTbLoadNamespace
   *
   * PARAMETERS:  None
   *
   * RETURN:      Status
   *
   * DESCRIPTION: Load the namespace from the DSDT and all SSDTs/PSDTs found in
   *              the RSDT/XSDT.
   *
   ******************************************************************************/
  
  static ACPI_STATUS
  AcpiTbLoadNamespace (
      void)
  {
      ACPI_STATUS             Status;
      UINT32                  i;
      ACPI_TABLE_HEADER       *NewDsdt;
  
  
      ACPI_FUNCTION_TRACE (TbLoadNamespace);
  
  
      (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
  
      /*
       * Load the namespace. The DSDT is required, but any SSDT and
       * PSDT tables are optional. Verify the DSDT.
       */
      if (!AcpiGbl_RootTableList.CurrentTableCount ||
          !ACPI_COMPARE_NAME (
              &(AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Signature),
              ACPI_SIG_DSDT) ||
           ACPI_FAILURE (AcpiTbVerifyTable (
              &AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT])))
      {
          Status = AE_NO_ACPI_TABLES;
          goto UnlockAndExit;
      }
  
      /*
       * Save the DSDT pointer for simple access. This is the mapped memory
       * address. We must take care here because the address of the .Tables
       * array can change dynamically as tables are loaded at run-time. Note:
       * .Pointer field is not validated until after call to AcpiTbVerifyTable.
       */
      AcpiGbl_DSDT = AcpiGbl_RootTableList.Tables[ACPI_TABLE_INDEX_DSDT].Pointer;
  
      /*
       * Optionally copy the entire DSDT to local memory (instead of simply
       * mapping it.) There are some BIOSs that corrupt or replace the original
       * DSDT, creating the need for this option. Default is FALSE, do not copy
       * the DSDT.
       */
      if (AcpiGbl_CopyDsdtLocally)
      {
          NewDsdt = AcpiTbCopyDsdt (ACPI_TABLE_INDEX_DSDT);
          if (NewDsdt)
          {
              AcpiGbl_DSDT = NewDsdt;
          }
      }
  
      /*
       * Save the original DSDT header for detection of table corruption
       * and/or replacement of the DSDT from outside the OS.
       */
      ACPI_MEMCPY (&AcpiGbl_OriginalDsdtHeader, AcpiGbl_DSDT,
          sizeof (ACPI_TABLE_HEADER));
  
      (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
  
      /* Load and parse tables */
  
      Status = AcpiNsLoadTable (ACPI_TABLE_INDEX_DSDT, AcpiGbl_RootNode);
      if (ACPI_FAILURE (Status))
      {
          return_ACPI_STATUS (Status);
      }
  
      /* Load any SSDT or PSDT tables. Note: Loop leaves tables locked */
  
      (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
      for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
      {
          if ((!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
                      ACPI_SIG_SSDT) &&
               !ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
                      ACPI_SIG_PSDT)) ||
               ACPI_FAILURE (AcpiTbVerifyTable (
                  &AcpiGbl_RootTableList.Tables[i])))
          {
              continue;
          }
  
          /* Ignore errors while loading tables, get as many as possible */
  
          (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
          (void) AcpiNsLoadTable (i, AcpiGbl_RootNode);
          (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
      }
  
      ACPI_INFO ((AE_INFO, "All ACPI Tables successfully acquired"));
  
  UnlockAndExit:
      (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
      return_ACPI_STATUS (Status);
  }
  
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiLoadTable
   *
   * PARAMETERS:  Table               - Pointer to a buffer containing the ACPI
   *                                    table to be loaded.
   *
   * RETURN:      Status
   *
   * DESCRIPTION: Dynamically load an ACPI table from the caller's buffer. Must
   *              be a valid ACPI table with a valid ACPI table header.
   *              Note1: Mainly intended to support hotplug addition of SSDTs.
   *              Note2: Does not copy the incoming table. User is responsible
   *              to ensure that the table is not deleted or unmapped.
   *
   ******************************************************************************/
  
  ACPI_STATUS
  AcpiLoadTable (
      ACPI_TABLE_HEADER       *Table)
  {
      ACPI_STATUS             Status;
      ACPI_TABLE_DESC         TableDesc;
      UINT32                  TableIndex;
  
  
      ACPI_FUNCTION_TRACE (AcpiLoadTable);
  
  
      /* Parameter validation */
  
      if (!Table)
      {
          return_ACPI_STATUS (AE_BAD_PARAMETER);
      }
  
      /* Init local table descriptor */
  
      ACPI_MEMSET (&TableDesc, 0, sizeof (ACPI_TABLE_DESC));
      TableDesc.Address = ACPI_PTR_TO_PHYSADDR (Table);
      TableDesc.Pointer = Table;
      TableDesc.Length = Table->Length;
      TableDesc.Flags = ACPI_TABLE_ORIGIN_UNKNOWN;
  
      /* Must acquire the interpreter lock during this operation */
  
      Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
      if (ACPI_FAILURE (Status))
      {
          return_ACPI_STATUS (Status);
      }
  
      /* Install the table and load it into the namespace */
  
      ACPI_INFO ((AE_INFO, "Host-directed Dynamic ACPI Table Load:"));
      Status = AcpiTbAddTable (&TableDesc, &TableIndex);
      if (ACPI_FAILURE (Status))
      {
          goto UnlockAndExit;
      }
  
      Status = AcpiNsLoadTable (TableIndex, AcpiGbl_RootNode);
  
      /* Invoke table handler if present */
  
      if (AcpiGbl_TableHandler)
      {
          (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table,
                      AcpiGbl_TableHandlerContext);
      }
  
  UnlockAndExit:
      (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
      return_ACPI_STATUS (Status);
  }
  
  ACPI_EXPORT_SYMBOL (AcpiLoadTable)
  
  
  /*******************************************************************************
   *
   * FUNCTION:    AcpiUnloadParentTable
   *
   * PARAMETERS:  Object              - Handle to any namespace object owned by
   *                                    the table to be unloaded
   *
   * RETURN:      Status
   *
   * DESCRIPTION: Via any namespace object within an SSDT or OEMx table, unloads
   *              the table and deletes all namespace objects associated with
   *              that table. Unloading of the DSDT is not allowed.
   *              Note: Mainly intended to support hotplug removal of SSDTs.
   *
   ******************************************************************************/
  
  ACPI_STATUS
  AcpiUnloadParentTable (
      ACPI_HANDLE             Object)
  {
      ACPI_NAMESPACE_NODE     *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Object);
      ACPI_STATUS             Status = AE_NOT_EXIST;
      ACPI_OWNER_ID           OwnerId;
      UINT32                  i;
  
  
      ACPI_FUNCTION_TRACE (AcpiUnloadParentTable);
  
  
      /* Parameter validation */
  
      if (!Object)
      {
          return_ACPI_STATUS (AE_BAD_PARAMETER);
      }
  
      /*
       * The node OwnerId is currently the same as the parent table ID.
       * However, this could change in the future.
       */
      OwnerId = Node->OwnerId;
      if (!OwnerId)
      {
          /* OwnerId==0 means DSDT is the owner. DSDT cannot be unloaded */
  
          return_ACPI_STATUS (AE_TYPE);
      }
  
      /* Must acquire the interpreter lock during this operation */
  
      Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
      if (ACPI_FAILURE (Status))
      {
          return_ACPI_STATUS (Status);
      }
  
      /* Find the table in the global table list */
  
      for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
      {
          if (OwnerId != AcpiGbl_RootTableList.Tables[i].OwnerId)
          {
              continue;
          }
  
          /*
           * Allow unload of SSDT and OEMx tables only. Do not allow unload
           * of the DSDT. No other types of tables should get here, since
           * only these types can contain AML and thus are the only types
           * that can create namespace objects.
           */
          if (ACPI_COMPARE_NAME (
              AcpiGbl_RootTableList.Tables[i].Signature.Ascii,
              ACPI_SIG_DSDT))
          {
              Status = AE_TYPE;
              break;
          }
  
          /* Ensure the table is actually loaded */
  
          if (!AcpiTbIsTableLoaded (i))
          {
              Status = AE_NOT_EXIST;
              break;
          }
  
          /* Invoke table handler if present */
  
          if (AcpiGbl_TableHandler)
          {
              (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD,
                          AcpiGbl_RootTableList.Tables[i].Pointer,
                          AcpiGbl_TableHandlerContext);
          }
  
          /*
           * Delete all namespace objects owned by this table. Note that
           * these objects can appear anywhere in the namespace by virtue
           * of the AML "Scope" operator. Thus, we need to track ownership
           * by an ID, not simply a position within the hierarchy.
           */
          Status = AcpiTbDeleteNamespaceByOwner (i);
          if (ACPI_FAILURE (Status))
          {
              break;
          }
  
          Status = AcpiTbReleaseOwnerId (i);
          AcpiTbSetTableLoadedFlag (i, FALSE);
          break;
      }
  
      (void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
      return_ACPI_STATUS (Status);
  }
  
  ACPI_EXPORT_SYMBOL (AcpiUnloadParentTable)
  