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/** @file
Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
PlatformInfoDxe.c
Abstract:
Platform Info driver to public platform related HOB data
--*/
#include "PlatformInfoDxe.h"
/**
Entry point for the driver.
This routine get the platform HOB data from PEI and publish
as Platform Info variable that can be accessed during boot service and
runtime.
@param ImageHandle Image Handle.
@param SystemTable EFI System Table.
@retval Status Function execution status.
**/
EFI_STATUS
EFIAPI
PlatformInfoInit (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_PLATFORM_INFO_HOB *PlatformInfoHobPtr;
EFI_PEI_HOB_POINTERS GuidHob;
EFI_PLATFORM_INFO_HOB TmpHob;
UINTN VarSize;
EFI_OS_SELECTION_HOB *OsSlectionHobPtr;
UINT8 Selection;
SYSTEM_CONFIGURATION SystemConfiguration;
UINT8 *LpssDataHobPtr;
UINT8 *LpssDataVarPtr;
UINTN i;
VarSize = sizeof(SYSTEM_CONFIGURATION);
Status = gRT->GetVariable(
NORMAL_SETUP_NAME,
&gEfiNormalSetupGuid,
NULL,
&VarSize,
&SystemConfiguration
);
if (EFI_ERROR (Status) || VarSize != sizeof(SYSTEM_CONFIGURATION)) {
//The setup variable is corrupted
VarSize = sizeof(SYSTEM_CONFIGURATION);
Status = gRT->GetVariable(
L"SetupRecovery",
&gEfiNormalSetupGuid,
NULL,
&VarSize,
&SystemConfiguration
);
ASSERT_EFI_ERROR (Status);
}
VarSize = sizeof(Selection);
Status = gRT->GetVariable(
L"OsSelection",
&gOsSelectionVariableGuid,
NULL,
&VarSize,
&Selection
);
if (EFI_ERROR(Status)) {
Selection = SystemConfiguration.ReservedO;
Status = gRT->SetVariable (
L"OsSelection",
&gOsSelectionVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
sizeof(Selection),
&Selection
);
}
GuidHob.Raw = GetHobList ();
if (GuidHob.Raw != NULL) {
if ((GuidHob.Raw = GetNextGuidHob (&gOsSelectionVariableGuid, GuidHob.Raw)) != NULL) {
OsSlectionHobPtr = GET_GUID_HOB_DATA (GuidHob.Guid);
if (OsSlectionHobPtr->OsSelectionChanged) {
SystemConfiguration.ReservedO = OsSlectionHobPtr->OsSelection;
//
// Load Audio default configuration
//
SystemConfiguration.Lpe = OsSlectionHobPtr->Lpe;
SystemConfiguration.PchAzalia = OsSlectionHobPtr->PchAzalia;
//
// Load LPSS and SCC default configurations
//
LpssDataHobPtr = &OsSlectionHobPtr->LpssData.LpssPciModeEnabled;
LpssDataVarPtr = &SystemConfiguration.LpssPciModeEnabled;
for (i = 0; i < sizeof(EFI_PLATFORM_LPSS_DATA); i++) {
*LpssDataVarPtr = *LpssDataHobPtr;
LpssDataVarPtr++;
LpssDataHobPtr++;
}
SystemConfiguration.GOPEnable = TRUE;
Status = gRT->SetVariable (
NORMAL_SETUP_NAME,
&gEfiNormalSetupGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_NON_VOLATILE,
sizeof(SYSTEM_CONFIGURATION),
&SystemConfiguration
);
ASSERT_EFI_ERROR (Status);
}
}
}
GuidHob.Raw = GetHobList ();
if (GuidHob.Raw == NULL) {
return EFI_NOT_FOUND;
}
if ((GuidHob.Raw = GetNextGuidHob (&gEfiPlatformInfoGuid, GuidHob.Raw)) != NULL) {
PlatformInfoHobPtr = GET_GUID_HOB_DATA (GuidHob.Guid);
VarSize = sizeof(EFI_PLATFORM_INFO_HOB);
Status = gRT->GetVariable(
L"PlatformInfo",
&gEfiVlv2VariableGuid,
NULL,
&VarSize,
&TmpHob
);
if (EFI_ERROR(Status) || CompareMem (&TmpHob, PlatformInfoHobPtr, VarSize)) {
//
// Write the Platform Info to volatile memory
//
Status = gRT->SetVariable(
L"PlatformInfo",
&gEfiVlv2VariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_NON_VOLATILE,
sizeof(EFI_PLATFORM_INFO_HOB),
PlatformInfoHobPtr
);
if (EFI_ERROR(Status)) {
return Status;
}
}
}
return EFI_SUCCESS;
}
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