/******************************************************************************
*
* Module Name: oswintbl - Windows OSL for obtaining ACPI tables
*
*****************************************************************************/
/******************************************************************************
*
* 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.
*
*****************************************************************************/
#include "acpi.h"
#ifdef WIN32
#pragma warning(disable:4115) /* warning C4115: (caused by rpcasync.h) */
#include <windows.h>
#elif WIN64
#include <windowsx.h>
#endif
#define _COMPONENT ACPI_OS_SERVICES
ACPI_MODULE_NAME ("oswintbl")
static char KeyBuffer[64];
static char ErrorBuffer[64];
/* Little front-end to win FormatMessage */
char *
OsFormatException (
LONG Status)
{
ErrorBuffer[0] = 0;
FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, Status, 0,
ErrorBuffer, 64, NULL);
return (ErrorBuffer);
}
/******************************************************************************
*
* FUNCTION: OsGetTable
*
* PARAMETERS: Signature - ACPI Signature for desired table. must be
* a null terminated string.
*
* RETURN: Pointer to the table. NULL if failure.
*
* DESCRIPTION: Get an ACPI table from the Windows registry.
*
*****************************************************************************/
ACPI_TABLE_HEADER *
OsGetTable (
char *Signature)
{
HKEY Handle = NULL;
ULONG i;
LONG Status;
ULONG Type;
ULONG NameSize;
ULONG DataSize;
HKEY SubKey;
ACPI_TABLE_HEADER *ReturnTable;
/* Get a handle to the table key */
while (1)
{
ACPI_STRCPY (KeyBuffer, "HARDWARE\\ACPI\\");
ACPI_STRCAT (KeyBuffer, Signature);
Status = RegOpenKeyEx (HKEY_LOCAL_MACHINE, KeyBuffer,
0L, KEY_READ, &Handle);
if (Status != ERROR_SUCCESS)
{
/*
* Somewhere along the way, MS changed the registry entry for
* the FADT from
* HARDWARE/ACPI/FACP to
* HARDWARE/ACPI/FADT.
*
* This code allows for both.
*/
if (ACPI_COMPARE_NAME (Signature, "FACP"))
{
Signature = "FADT";
}
else
{
AcpiOsPrintf (
"Could not find %s in registry at %s: %s (Status=0x%X)\n",
Signature, KeyBuffer, OsFormatException (Status), Status);
return (NULL);
}
}
else
{
break;
}
}
/* Actual data for table is down a couple levels */
for (i = 0; ;)
{
Status = RegEnumKey (Handle, i, KeyBuffer, sizeof (KeyBuffer));
i += 1;
if (Status == ERROR_NO_MORE_ITEMS)
{
break;
}
Status = RegOpenKey (Handle, KeyBuffer, &SubKey);
if (Status != ERROR_SUCCESS)
{
AcpiOsPrintf ("Could not open %s entry: %s\n",
Signature, OsFormatException (Status));
return (NULL);
}
RegCloseKey (Handle);
Handle = SubKey;
i = 0;
}
/* Find the (binary) table entry */
for (i = 0; ;)
{
NameSize = sizeof (KeyBuffer);
Status = RegEnumValue (Handle, i, KeyBuffer, &NameSize,
NULL, &Type, NULL, 0);
if (Status != ERROR_SUCCESS)
{
AcpiOsPrintf ("Could not get %s registry entry: %s\n",
Signature, OsFormatException (Status));
return (NULL);
}
if (Type == REG_BINARY)
{
break;
}
i += 1;
}
/* Get the size of the table */
Status = RegQueryValueEx (Handle, KeyBuffer, NULL, NULL, NULL, &DataSize);
if (Status != ERROR_SUCCESS)
{
AcpiOsPrintf ("Could not read the %s table size: %s\n",
Signature, OsFormatException (Status));
return (NULL);
}
/* Allocate a new buffer for the table */
ReturnTable = AcpiOsAllocate (DataSize);
if (!ReturnTable)
{
goto Cleanup;
}
/* Get the actual table from the registry */
Status = RegQueryValueEx (Handle, KeyBuffer, NULL, NULL,
(UCHAR *) ReturnTable, &DataSize);
if (Status != ERROR_SUCCESS)
{
AcpiOsPrintf ("Could not read %s data: %s\n",
Signature, OsFormatException (Status));
AcpiOsFree (ReturnTable);
return (NULL);
}
Cleanup:
RegCloseKey (Handle);
return (ReturnTable);
}