/******************************************************************************
*
* Module Name: tbinstal - ACPI table installation and removal
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2011, 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 __TBINSTAL_C__
#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbinstal")
/******************************************************************************
*
* FUNCTION: AcpiTbVerifyTable
*
* PARAMETERS: TableDesc - table
*
* RETURN: Status
*
* DESCRIPTION: this function is called to verify and map table
*
*****************************************************************************/
ACPI_STATUS
AcpiTbVerifyTable (
ACPI_TABLE_DESC *TableDesc)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (TbVerifyTable);
/* Map the table if necessary */
if (!TableDesc->Pointer)
{
if ((TableDesc->Flags & ACPI_TABLE_ORIGIN_MASK) ==
ACPI_TABLE_ORIGIN_MAPPED)
{
TableDesc->Pointer = AcpiOsMapMemory (
TableDesc->Address, TableDesc->Length);
}
if (!TableDesc->Pointer)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
}
/* FACS is the odd table, has no standard ACPI header and no checksum */
if (!ACPI_COMPARE_NAME (&TableDesc->Signature, ACPI_SIG_FACS))
{
/* Always calculate checksum, ignore bad checksum if requested */
Status = AcpiTbVerifyChecksum (TableDesc->Pointer, TableDesc->Length);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbAddTable
*
* PARAMETERS: TableDesc - Table descriptor
* TableIndex - Where the table index is returned
*
* RETURN: Status
*
* DESCRIPTION: This function is called to add an ACPI table. It is used to
* dynamically load tables via the Load and LoadTable AML
* operators.
*
******************************************************************************/
ACPI_STATUS
AcpiTbAddTable (
ACPI_TABLE_DESC *TableDesc,
UINT32 *TableIndex)
{
UINT32 i;
ACPI_STATUS Status = AE_OK;
ACPI_TABLE_HEADER *OverrideTable = NULL;
ACPI_FUNCTION_TRACE (TbAddTable);
if (!TableDesc->Pointer)
{
Status = AcpiTbVerifyTable (TableDesc);
if (ACPI_FAILURE (Status) || !TableDesc->Pointer)
{
return_ACPI_STATUS (Status);
}
}
/*
* Validate the incoming table signature.
*
* 1) Originally, we checked the table signature for "SSDT" or "PSDT".
* 2) We added support for OEMx tables, signature "OEM".
* 3) Valid tables were encountered with a null signature, so we just
* gave up on validating the signature, (05/2008).
* 4) We encountered non-AML tables such as the MADT, which caused
* interpreter errors and kernel faults. So now, we once again allow
* only "SSDT", "OEMx", and now, also a null signature. (05/2011).
*/
if ((TableDesc->Pointer->Signature[0] != 0x00) &&
(!ACPI_COMPARE_NAME (TableDesc->Pointer->Signature, ACPI_SIG_SSDT)) &&
(ACPI_STRNCMP (TableDesc->Pointer->Signature, "OEM", 3)))
{
ACPI_ERROR ((AE_INFO,
"Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx",
AcpiUtValidAcpiName (*(UINT32 *) TableDesc->Pointer->Signature) ?
TableDesc->Pointer->Signature : "????",
*(UINT32 *) TableDesc->Pointer->Signature));
return_ACPI_STATUS (AE_BAD_SIGNATURE);
}
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Check if table is already registered */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_FAILURE (Status) ||
!AcpiGbl_RootTableList.Tables[i].Pointer)
{
continue;
}
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (TableDesc->Length != AcpiGbl_RootTableList.Tables[i].Length)
{
continue;
}
if (ACPI_MEMCMP (TableDesc->Pointer,
AcpiGbl_RootTableList.Tables[i].Pointer,
AcpiGbl_RootTableList.Tables[i].Length))
{
continue;
}
/*
* Note: the current mechanism does not unregister a table if it is
* dynamically unloaded. The related namespace entries are deleted,
* but the table remains in the root table list.
*
* The assumption here is that the number of different tables that
* will be loaded is actually small, and there is minimal overhead
* in just keeping the table in case it is needed again.
*
* If this assumption changes in the future (perhaps on large
* machines with many table load/unload operations), tables will
* need to be unregistered when they are unloaded, and slots in the
* root table list should be reused when empty.
*/
/*
* Table is already registered.
* We can delete the table that was passed as a parameter.
*/
AcpiTbDeleteTable (TableDesc);
*TableIndex = i;
if (AcpiGbl_RootTableList.Tables[i].Flags & ACPI_TABLE_IS_LOADED)
{
/* Table is still loaded, this is an error */
Status = AE_ALREADY_EXISTS;
goto Release;
}
else
{
/* Table was unloaded, allow it to be reloaded */
TableDesc->Pointer = AcpiGbl_RootTableList.Tables[i].Pointer;
TableDesc->Address = AcpiGbl_RootTableList.Tables[i].Address;
Status = AE_OK;
goto PrintHeader;
}
}
/*
* ACPI Table Override:
* Allow the host to override dynamically loaded tables.
*/
Status = AcpiOsTableOverride (TableDesc->Pointer, &OverrideTable);
if (ACPI_SUCCESS (Status) && OverrideTable)
{
ACPI_INFO ((AE_INFO,
"%4.4s @ 0x%p Table override, replaced with:",
TableDesc->Pointer->Signature,
ACPI_CAST_PTR (void, TableDesc->Address)));
/* We can delete the table that was passed as a parameter */
AcpiTbDeleteTable (TableDesc);
/* Setup descriptor for the new table */
TableDesc->Address = ACPI_PTR_TO_PHYSADDR (OverrideTable);
TableDesc->Pointer = OverrideTable;
TableDesc->Length = OverrideTable->Length;
TableDesc->Flags = ACPI_TABLE_ORIGIN_OVERRIDE;
}
/* Add the table to the global root table list */
Status = AcpiTbStoreTable (TableDesc->Address, TableDesc->Pointer,
TableDesc->Length, TableDesc->Flags, TableIndex);
if (ACPI_FAILURE (Status))
{
goto Release;
}
PrintHeader:
AcpiTbPrintTableHeader (TableDesc->Address, TableDesc->Pointer);
Release:
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbResizeRootTableList
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Expand the size of global table array
*
******************************************************************************/
ACPI_STATUS
AcpiTbResizeRootTableList (
void)
{
ACPI_TABLE_DESC *Tables;
ACPI_FUNCTION_TRACE (TbResizeRootTableList);
/* AllowResize flag is a parameter to AcpiInitializeTables */
if (!(AcpiGbl_RootTableList.Flags & ACPI_ROOT_ALLOW_RESIZE))
{
ACPI_ERROR ((AE_INFO, "Resize of Root Table Array is not allowed"));
return_ACPI_STATUS (AE_SUPPORT);
}
/* Increase the Table Array size */
Tables = ACPI_ALLOCATE_ZEROED (
((ACPI_SIZE) AcpiGbl_RootTableList.MaxTableCount +
ACPI_ROOT_TABLE_SIZE_INCREMENT) *
sizeof (ACPI_TABLE_DESC));
if (!Tables)
{
ACPI_ERROR ((AE_INFO, "Could not allocate new root table array"));
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Copy and free the previous table array */
if (AcpiGbl_RootTableList.Tables)
{
ACPI_MEMCPY (Tables, AcpiGbl_RootTableList.Tables,
(ACPI_SIZE) AcpiGbl_RootTableList.MaxTableCount * sizeof (ACPI_TABLE_DESC));
if (AcpiGbl_RootTableList.Flags & ACPI_ROOT_ORIGIN_ALLOCATED)
{
ACPI_FREE (AcpiGbl_RootTableList.Tables);
}
}
AcpiGbl_RootTableList.Tables = Tables;
AcpiGbl_RootTableList.MaxTableCount += ACPI_ROOT_TABLE_SIZE_INCREMENT;
AcpiGbl_RootTableList.Flags |= (UINT8) ACPI_ROOT_ORIGIN_ALLOCATED;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbStoreTable
*
* PARAMETERS: Address - Table address
* Table - Table header
* Length - Table length
* Flags - flags
*
* RETURN: Status and table index.
*
* DESCRIPTION: Add an ACPI table to the global table list
*
******************************************************************************/
ACPI_STATUS
AcpiTbStoreTable (
ACPI_PHYSICAL_ADDRESS Address,
ACPI_TABLE_HEADER *Table,
UINT32 Length,
UINT8 Flags,
UINT32 *TableIndex)
{
ACPI_STATUS Status;
ACPI_TABLE_DESC *NewTable;
/* Ensure that there is room for the table in the Root Table List */
if (AcpiGbl_RootTableList.CurrentTableCount >=
AcpiGbl_RootTableList.MaxTableCount)
{
Status = AcpiTbResizeRootTableList();
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
NewTable = &AcpiGbl_RootTableList.Tables[AcpiGbl_RootTableList.CurrentTableCount];
/* Initialize added table */
NewTable->Address = Address;
NewTable->Pointer = Table;
NewTable->Length = Length;
NewTable->OwnerId = 0;
NewTable->Flags = Flags;
ACPI_MOVE_32_TO_32 (&NewTable->Signature, Table->Signature);
*TableIndex = AcpiGbl_RootTableList.CurrentTableCount;
AcpiGbl_RootTableList.CurrentTableCount++;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbDeleteTable
*
* PARAMETERS: TableIndex - Table index
*
* RETURN: None
*
* DESCRIPTION: Delete one internal ACPI table
*
******************************************************************************/
void
AcpiTbDeleteTable (
ACPI_TABLE_DESC *TableDesc)
{
/* Table must be mapped or allocated */
if (!TableDesc->Pointer)
{
return;
}
switch (TableDesc->Flags & ACPI_TABLE_ORIGIN_MASK)
{
case ACPI_TABLE_ORIGIN_MAPPED:
AcpiOsUnmapMemory (TableDesc->Pointer, TableDesc->Length);
break;
case ACPI_TABLE_ORIGIN_ALLOCATED:
ACPI_FREE (TableDesc->Pointer);
break;
default:
break;
}
TableDesc->Pointer = NULL;
}
/*******************************************************************************
*
* FUNCTION: AcpiTbTerminate
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Delete all internal ACPI tables
*
******************************************************************************/
void
AcpiTbTerminate (
void)
{
UINT32 i;
ACPI_FUNCTION_TRACE (TbTerminate);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Delete the individual tables */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
{
AcpiTbDeleteTable (&AcpiGbl_RootTableList.Tables[i]);
}
/*
* Delete the root table array if allocated locally. Array cannot be
* mapped, so we don't need to check for that flag.
*/
if (AcpiGbl_RootTableList.Flags & ACPI_ROOT_ORIGIN_ALLOCATED)
{
ACPI_FREE (AcpiGbl_RootTableList.Tables);
}
AcpiGbl_RootTableList.Tables = NULL;
AcpiGbl_RootTableList.Flags = 0;
AcpiGbl_RootTableList.CurrentTableCount = 0;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ACPI Tables freed\n"));
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbDeleteNamespaceByOwner
*
* PARAMETERS: TableIndex - Table index
*
* RETURN: Status
*
* DESCRIPTION: Delete all namespace objects created when this table was loaded.
*
******************************************************************************/
ACPI_STATUS
AcpiTbDeleteNamespaceByOwner (
UINT32 TableIndex)
{
ACPI_OWNER_ID OwnerId;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (TbDeleteNamespaceByOwner);
Status = AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
if (TableIndex >= AcpiGbl_RootTableList.CurrentTableCount)
{
/* The table index does not exist */
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Get the owner ID for this table, used to delete namespace nodes */
OwnerId = AcpiGbl_RootTableList.Tables[TableIndex].OwnerId;
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
/*
* Need to acquire the namespace writer lock to prevent interference
* with any concurrent namespace walks. The interpreter must be
* released during the deletion since the acquisition of the deletion
* lock may block, and also since the execution of a namespace walk
* must be allowed to use the interpreter.
*/
(void) AcpiUtReleaseMutex (ACPI_MTX_INTERPRETER);
Status = AcpiUtAcquireWriteLock (&AcpiGbl_NamespaceRwLock);
AcpiNsDeleteNamespaceByOwner (OwnerId);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
AcpiUtReleaseWriteLock (&AcpiGbl_NamespaceRwLock);
Status = AcpiUtAcquireMutex (ACPI_MTX_INTERPRETER);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbAllocateOwnerId
*
* PARAMETERS: TableIndex - Table index
*
* RETURN: Status
*
* DESCRIPTION: Allocates OwnerId in TableDesc
*
******************************************************************************/
ACPI_STATUS
AcpiTbAllocateOwnerId (
UINT32 TableIndex)
{
ACPI_STATUS Status = AE_BAD_PARAMETER;
ACPI_FUNCTION_TRACE (TbAllocateOwnerId);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (TableIndex < AcpiGbl_RootTableList.CurrentTableCount)
{
Status = AcpiUtAllocateOwnerId
(&(AcpiGbl_RootTableList.Tables[TableIndex].OwnerId));
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbReleaseOwnerId
*
* PARAMETERS: TableIndex - Table index
*
* RETURN: Status
*
* DESCRIPTION: Releases OwnerId in TableDesc
*
******************************************************************************/
ACPI_STATUS
AcpiTbReleaseOwnerId (
UINT32 TableIndex)
{
ACPI_STATUS Status = AE_BAD_PARAMETER;
ACPI_FUNCTION_TRACE (TbReleaseOwnerId);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (TableIndex < AcpiGbl_RootTableList.CurrentTableCount)
{
AcpiUtReleaseOwnerId (
&(AcpiGbl_RootTableList.Tables[TableIndex].OwnerId));
Status = AE_OK;
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbGetOwnerId
*
* PARAMETERS: TableIndex - Table index
* OwnerId - Where the table OwnerId is returned
*
* RETURN: Status
*
* DESCRIPTION: returns OwnerId for the ACPI table
*
******************************************************************************/
ACPI_STATUS
AcpiTbGetOwnerId (
UINT32 TableIndex,
ACPI_OWNER_ID *OwnerId)
{
ACPI_STATUS Status = AE_BAD_PARAMETER;
ACPI_FUNCTION_TRACE (TbGetOwnerId);
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (TableIndex < AcpiGbl_RootTableList.CurrentTableCount)
{
*OwnerId = AcpiGbl_RootTableList.Tables[TableIndex].OwnerId;
Status = AE_OK;
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbIsTableLoaded
*
* PARAMETERS: TableIndex - Table index
*
* RETURN: Table Loaded Flag
*
******************************************************************************/
BOOLEAN
AcpiTbIsTableLoaded (
UINT32 TableIndex)
{
BOOLEAN IsLoaded = FALSE;
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (TableIndex < AcpiGbl_RootTableList.CurrentTableCount)
{
IsLoaded = (BOOLEAN)
(AcpiGbl_RootTableList.Tables[TableIndex].Flags &
ACPI_TABLE_IS_LOADED);
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return (IsLoaded);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbSetTableLoadedFlag
*
* PARAMETERS: TableIndex - Table index
* IsLoaded - TRUE if table is loaded, FALSE otherwise
*
* RETURN: None
*
* DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
*
******************************************************************************/
void
AcpiTbSetTableLoadedFlag (
UINT32 TableIndex,
BOOLEAN IsLoaded)
{
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
if (TableIndex < AcpiGbl_RootTableList.CurrentTableCount)
{
if (IsLoaded)
{
AcpiGbl_RootTableList.Tables[TableIndex].Flags |=
ACPI_TABLE_IS_LOADED;
}
else
{
AcpiGbl_RootTableList.Tables[TableIndex].Flags &=
~ACPI_TABLE_IS_LOADED;
}
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
}