diff options
Diffstat (limited to 'source/os_specific/service_layers/oswintbl.c')
| -rw-r--r-- | source/os_specific/service_layers/oswintbl.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/source/os_specific/service_layers/oswintbl.c b/source/os_specific/service_layers/oswintbl.c new file mode 100644 index 0000000000000..db34966a0d9ec --- /dev/null +++ b/source/os_specific/service_layers/oswintbl.c @@ -0,0 +1,222 @@ +/****************************************************************************** + * + * Module Name: oswintbl - Windows OSL for obtaining ACPI tables + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + + +#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); +} + |