/** @file | |
SMM Control2 Protocol on SMM Control Protocol Thunk driver. | |
Copyright (c) 2009 - 2011, 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 | |
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_INVALID_PARAMETER The last periodic activation has not been cleared. | |
@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; | |
} | |