/**
SMM Firmware Volume Block Protocol notification event handler.
@param[in] Protocol Points to the protocol's unique identifier
@param[in] Interface Points to the interface instance
@param[in] Handle The handle on which the interface was installed
@retval EFI_SUCCESS SmmEventCallback runs successfully
**/
EFI_STATUS
EFIAPI
FvbNotificationEvent (
IN CONST EFI_GUID *Protocol,
IN VOID *Interface,
IN EFI_HANDLE Handle
)
{
EFI_STATUS Status;
EFI_SMM_FAULT_TOLERANT_WRITE_PROTOCOL *FtwProtocol;
EFI_HANDLE SmmFtwHandle;
//
// Just return to avoid install SMM FaultTolerantWriteProtocol again
// if SMM Fault Tolerant Write protocol had been installed.
//
Status = gSmst->SmmLocateProtocol (
&gEfiSmmFaultTolerantWriteProtocolGuid,
NULL,
(VOID **) &FtwProtocol
);
if (!EFI_ERROR (Status)) {
return EFI_SUCCESS;
}
//
// Found proper FVB protocol and initialize FtwDevice for protocol installation
//
Status = InitFtwProtocol (mFtwDevice);
if (EFI_ERROR(Status)) {
return Status;
}
//
// Install protocol interface
//
Status = gSmst->SmmInstallProtocolInterface (
&mFtwDevice->Handle,
&gEfiSmmFaultTolerantWriteProtocolGuid,
EFI_NATIVE_INTERFACE,
&mFtwDevice->FtwInstance
);
ASSERT_EFI_ERROR (Status);
//
// Notify the Ftw wrapper driver SMM Ftw is ready
//
SmmFtwHandle = NULL;
Status = gBS->InstallProtocolInterface (
&SmmFtwHandle,
&gEfiSmmFaultTolerantWriteProtocolGuid,
EFI_NATIVE_INTERFACE,
NULL
);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
/**
Firmware Volume Block Protocol notification event handler.
@param[in] Event Event whose notification function is being invoked.
@param[in] Context Pointer to the notification function's context.
**/
VOID
EFIAPI
FvbNotificationEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
EFI_FAULT_TOLERANT_WRITE_PROTOCOL *FtwProtocol;
EFI_FTW_DEVICE *FtwDevice;
//
// Just return to avoid installing FaultTolerantWriteProtocol again
// if Fault Tolerant Write protocol has been installed.
//
Status = gBS->LocateProtocol (
&gEfiFaultTolerantWriteProtocolGuid,
NULL,
(VOID **) &FtwProtocol
);
if (!EFI_ERROR (Status)) {
return ;
}
//
// Found proper FVB protocol and initialize FtwDevice for protocol installation
//
FtwDevice = (EFI_FTW_DEVICE *)Context;
Status = InitFtwProtocol (FtwDevice);
if (EFI_ERROR(Status)) {
return ;
}
//
// Install protocol interface
//
Status = gBS->InstallProtocolInterface (
&FtwDevice->Handle,
&gEfiFaultTolerantWriteProtocolGuid,
EFI_NATIVE_INTERFACE,
&FtwDevice->FtwInstance
);
ASSERT_EFI_ERROR (Status);
Status = gBS->CloseEvent (Event);
ASSERT_EFI_ERROR (Status);
return;
}
