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//**********************************************************************
//**********************************************************************
//** **
//** (C)Copyright 1985-2011, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//**********************************************************************
//**********************************************************************
///**********************************************************************
// $Header: /Alaska/SOURCE/Modules/CsmOptOut/CsmOptOutRuntime.c 4 8/29/12 2:25p Artems $
//
// $Revision: 4 $
//
// $Date: 8/29/12 2:25p $
//**********************************************************************
// Revision History
// ----------------
// $Log: /Alaska/SOURCE/Modules/CsmOptOut/CsmOptOutRuntime.c $
//
// 4 8/29/12 2:25p Artems
// [TAG] EIP98995
// [Category] Improvement
// [Description] When enable secure boot disable CSM but preserve CSM
// optout options setting,
// so once secure boot is disabled they can be restored
// [Files] CsmOptOut.sd, CsmOptOut.sdl, CsmOptOutSetup.c
// CsmOptOutRuntime.c
//
// 3 6/20/12 6:10p Artems
// [TAG] EIP83692
// [Category] Improvement
// [Description] CSM OptOut setup page grayed out if secure boot is
// enabled
// CSM OptOut PlatformOverride protocol modified to fix SCT bugs
// Removed support for Launch CSM "Auto" option
//
// [Files] CsmOptOut.c CsmOptOut.mak CsmOptOut.sd CsmOptOut.sdl
// CsmOptOut.uni CsmOptOutRuntime.c CsmOptOutSetup.c
//
// 2 3/23/12 6:26p Artems
// EIP 84012: Added fix to execute entrypoint only once
//
// 1 3/16/12 4:57p Artems
// Initial check-in
//
//**********************************************************************
//<AMI_FHDR_START>
//
// Name: CsmOptOutRuntime.c
//
// Description: This is the entry point of CsmOptOut driver
//
//<AMI_FHDR_END>
//**********************************************************************
//----------------------------------------------------------------------------
#include <Token.h>
#include <AmiDxeLib.h>
#include <Setup.h>
#include <AmiLoadCsmPolicy.h>
#include <ImageAuthentication.h>
//----------------------------------------------------------------------------
static EFI_GUID SetupGuid = SETUP_GUID;
static EFI_GUID AmiLoadCsmGuid = AMI_LOAD_CSM_GUID;
static EFI_GUID gEfiGlobalVariableGuid = EFI_GLOBAL_VARIABLE;
//<AMI_PHDR_START>
//----------------------------------------------------------------------------
// Procedure: CsmOptOutNotInSmmEntry
//
// Description: CsmOptOut runtime callback for variable services
//
// Input:
// IN EFI_EVENT Event - Callback event
// IN VOID *Context - pointer to calling context
//
// Output: None
//
//----------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS CsmOptOutNotInSmmEntry(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_HANDLE Handle = NULL;
SETUP_DATA SetupData;
UINTN Size;
UINT8 CurrentCsmState;
UINT32 Attributes;
BOOLEAN SecureBoot;
Size = sizeof(UINT8);
Status = pRS->GetVariable(EFI_SECURE_BOOT_NAME, &gEfiGlobalVariableGuid, NULL, &Size, &CurrentCsmState);
SecureBoot = (!EFI_ERROR(Status) && CurrentCsmState != 0) ? TRUE : FALSE;
Size = sizeof(SETUP_DATA);
Status = pRS->GetVariable(L"Setup", &SetupGuid, &Attributes, &Size, &SetupData);
CurrentCsmState = (SecureBoot) ? 0 : (EFI_ERROR(Status)) ? DEFAULT_CSM_LAUNCH_POLICY : SetupData.CsmLaunchPolicy;
if(CurrentCsmState == 1) {
Status = pBS->InstallMultipleProtocolInterfaces(&Handle,
&AmiLoadCsmGuid, NULL,
NULL);
ASSERT_EFI_ERROR(Status);
}
return Status;
}
//<AMI_PHDR_START>
//----------------------------------------------------------------------------
// Procedure: CsmOptOutRuntimeEntry
//
// Description: CsmOptOut runtime callback for variable services
//
// Input:
// IN EFI_EVENT Event - Callback event
// IN VOID *Context - pointer to calling context
//
// Output: None
//
//----------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS CsmOptOutRuntimeEntry(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
UINT32 Var;
UINTN Size = sizeof(UINT32);
InitAmiLib(ImageHandle, SystemTable);
Status = pRS->GetVariable(L"AmiLoadCsm", &AmiLoadCsmGuid, NULL, &Size, &Var);
if(!EFI_ERROR(Status))
return EFI_ALREADY_STARTED;
Size = sizeof(UINT32);
Var = 0xdeadbeef;
Status = pRS->SetVariable(L"AmiLoadCsm", &AmiLoadCsmGuid, EFI_VARIABLE_BOOTSERVICE_ACCESS, Size, &Var);
return CsmOptOutNotInSmmEntry(ImageHandle, SystemTable);
}
//**********************************************************************
//**********************************************************************
//** **
//** (C)Copyright 1985-2011, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//**********************************************************************
//**********************************************************************
|
