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//**********************************************************************
//**********************************************************************
//** **
//** (C)Copyright 1985-2014, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Pkwy, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//**********************************************************************
//**********************************************************************
//**********************************************************************
// $Header: /Alaska/SOURCE/Modules/BootScriptHide/BootScriptHideDxe.c 1 9/10/14 6:31p Aaronp $
//
// $Revision: 1 $
//
// $Date: 9/10/14 6:31p $
//**********************************************************************
// Revision History
// ----------------
// $Log: /Alaska/SOURCE/Modules/BootScriptHide/BootScriptHideDxe.c $
//
// 1 9/10/14 6:31p Aaronp
// First addition of BootScriptHide emodule.
//**********************************************************************
//**********************************************************************
//<AMI_FHDR_START>
//
// Name: BootScriptHideDxe.c
//
// Description: Source file for the DXE driver. This file contains the
// code to trigger the SWSMI that will save the boot scripts
// into SMM. Depending on the boot path, either a legacy
// boot event or an Exit Boot Services notification will
// notify the trigger function
//
//<AMI_FHDR_END>
//**********************************************************************
#include <AmiDxeLib.h>
#include <Token.h>
#include <Protocol/SmmControl2.h>
//<AMI_PHDR_START>
//----------------------------------------------------------------------------
// Procedure: GenerateSaveBootScriptSwSmi
//
// Description: Callback function called when either Exit Boot Services is called,
// or a legacy boot event is raised. This function will use the
// SmmControl protocol to trigger a SWSMI.
//
// Input:
// IN EFI_EVENT Event - Event that caused this function to be called
// IN VOID *Context - Context for the event that triggered this function
//
// Output:
// None
//----------------------------------------------------------------------------
//<AMI_PHDR_END>
VOID GenerateSaveBootScriptSwSmi (
IN EFI_EVENT Event, IN VOID *Context
){
static BOOLEAN BootScriptSaved = FALSE;
EFI_STATUS Status;
EFI_SMM_CONTROL2_PROTOCOL *SmmControl;
UINT8 SwSmiValue = BOOT_SCRIPT_SAVE_SW_SMI_VALUE;
if (BootScriptSaved){
pBS->CloseEvent(Event);
return;
}
Status = pBS->LocateProtocol (&gEfiSmmControl2ProtocolGuid, NULL, (VOID **)&SmmControl);
if (EFI_ERROR(Status)) return;
SmmControl->Trigger (SmmControl, &SwSmiValue, NULL, FALSE, 0);
BootScriptSaved = TRUE;
pBS->CloseEvent(Event);
}
//<AMI_PHDR_START>
//----------------------------------------------------------------------------
// Procedure: BootScriptHideDxeEntryPoint
//
// Description: Entry point for the DXE driver. Entry point will register a
// legacy boot event notification function, and a Exit Boot Services
// event handler. The same function is called for the legacy boot
// event and the exit boot services notification function.
//
// Input:
// IN EFI_HANDLE ImageHandle - The handle that corresponds this this loaded DXE driver
// IN EFI_SYSTEM_TABLE *SystemTable - Pointer to the EFI System Table
//
// Output:
// EFI_STATUS The return status of this function
//
//----------------------------------------------------------------------------
//<AMI_PHDR_END>
EFI_STATUS EFIAPI BootScriptHideDxeEntryPoint(IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable){
EFI_EVENT Event;
InitAmiLib(ImageHandle,SystemTable);
// We're using TPL_NOTIFY here (as oppose to TPL_CALLBACK) to make sure our callback is called prior to NVRAM driver callback.
// Otherwise we may be unable to read boot time variable in our SMI handler.
CreateLegacyBootEvent(TPL_NOTIFY, &GenerateSaveBootScriptSwSmi, NULL, &Event);
pBS->CreateEvent(
EVT_SIGNAL_EXIT_BOOT_SERVICES,TPL_NOTIFY,
&GenerateSaveBootScriptSwSmi, NULL, &Event
);
return EFI_SUCCESS;
}
//**********************************************************************
//**********************************************************************
//** **
//** (C)Copyright 1985-2014, American Megatrends, Inc. **
//** **
//** All Rights Reserved. **
//** **
//** 5555 Oakbrook Pkwy, Norcross, GA 30093 **
//** **
//** Phone: (770)-246-8600 **
//** **
//**********************************************************************
//**********************************************************************
|
