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/** @file
SMM Control2 Protocol on SMM Control Protocol Thunk driver.
Copyright (c) 2009 - 2010, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which 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.
**/
#include "SmmControl2OnSmmControlThunk.h"
EFI_SMM_CONTROL2_PROTOCOL gSmmControl2 = {
SmmControl2Trigger,
SmmControl2Clear,
0
};
EFI_SMM_CONTROL_PROTOCOL *mSmmControl;
UINT8 mDataPort;
/**
Invokes SMI activation from either the preboot or runtime environment.
This function generates an SMI.
@param[in] This The EFI_SMM_CONTROL2_PROTOCOL instance.
@param[in, out] CommandPort The value written to the command port.
@param[in, out] DataPort The value written to the data port.
@param[in] Periodic Optional mechanism to engender a periodic stream.
@param[in] ActivationInterval Optional parameter to repeat at this period one
time or, if the Periodic Boolean is set, periodically.
@retval EFI_SUCCESS The SMI/PMI has been engendered.
@retval EFI_DEVICE_ERROR The timing is unsupported.
@retval EFI_INVALID_PARAMETER The activation period is unsupported.
@retval EFI_NOT_STARTED The SMM base service has not been initialized.
**/
EFI_STATUS
EFIAPI
SmmControl2Trigger (
IN CONST EFI_SMM_CONTROL2_PROTOCOL *This,
IN OUT UINT8 *CommandPort OPTIONAL,
IN OUT UINT8 *DataPort OPTIONAL,
IN BOOLEAN Periodic OPTIONAL,
IN UINTN ActivationInterval OPTIONAL
)
{
UINTN ArgumentBufferSize;
ArgumentBufferSize = 0;
if (CommandPort != NULL) {
ArgumentBufferSize = 1;
}
if (DataPort != NULL) {
IoWrite8 (mDataPort, *DataPort);
}
return mSmmControl->Trigger (mSmmControl, (INT8 *)CommandPort, &ArgumentBufferSize, Periodic, ActivationInterval);
}
/**
Clears any system state that was created in response to the Trigger() call.
This function acknowledges and causes the deassertion of the SMI activation source.
@param[in] This The EFI_SMM_CONTROL2_PROTOCOL instance.
@param[in] Periodic Optional parameter to repeat at this period one time
@retval EFI_SUCCESS The SMI/PMI has been engendered.
@retval EFI_DEVICE_ERROR The source could not be cleared.
@retval EFI_INVALID_PARAMETER The service did not support the Periodic input argument.
**/
EFI_STATUS
EFIAPI
SmmControl2Clear (
IN CONST EFI_SMM_CONTROL2_PROTOCOL *This,
IN BOOLEAN Periodic OPTIONAL
)
{
return mSmmControl->Clear (mSmmControl, Periodic);
}
/**
Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.
This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.
It convers pointer to new virtual address.
@param[in] Event Event whose notification function is being invoked.
@param[in] Context Pointer to the notification function's context.
**/
VOID
EFIAPI
SetVirtualAddressNotify (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EfiConvertPointer (0x0, (VOID **)&mSmmControl);
}
/**
Entry Point for this thunk driver.
@param[in] ImageHandle Image handle of this driver.
@param[in] SystemTable A Pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurred when executing this entry point.
**/
EFI_STATUS
EFIAPI
SmmControl2ThunkMain (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_EVENT Event;
EFI_SMM_CONTROL_REGISTER RegisterInfo;
///
/// Locate Framework SMM Control Protocol
///
Status = gBS->LocateProtocol (&gEfiSmmControlProtocolGuid, NULL, (VOID **)&mSmmControl);
ASSERT_EFI_ERROR (Status);
gSmmControl2.MinimumTriggerPeriod = mSmmControl->MinimumTriggerPeriod;
Status = mSmmControl->GetRegisterInfo (mSmmControl, &RegisterInfo);
ASSERT_EFI_ERROR (Status);
mDataPort = RegisterInfo.SmiDataRegister;
///
/// Create event on SetVirtualAddressMap() to convert mSmmControl from a physical address to a virtual address
///
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
SetVirtualAddressNotify,
NULL,
&gEfiEventVirtualAddressChangeGuid,
&Event
);
ASSERT_EFI_ERROR (Status);
///
/// Publish framework SMM Control Protocol
///
Status = gBS->InstallProtocolInterface (
&ImageHandle,
&gEfiSmmControl2ProtocolGuid,
EFI_NATIVE_INTERFACE,
&gSmmControl2
);
return Status;
}
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