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/** @file
This is the driver that publishes the SMM Control Ppi.
Copyright (c) 2012 - 2016, 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 "SmmControlDriver.h"
EFI_GUID mPeiSmmControlPpiGuid = PEI_SMM_CONTROL_PPI_GUID;
STATIC PEI_SMM_CONTROL_PPI mSmmControlPpi = {
PeiActivate,
PeiDeactivate
};
STATIC EFI_PEI_PPI_DESCRIPTOR mPpiList = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&mPeiSmmControlPpiGuid,
&mSmmControlPpi
};
/**
This is the constructor for the SMM Control ppi
@param[in] FfsHeader FfsHeader.
@param[in] PeiServices General purpose services available to every PEIM.
@retval EFI_STATUS Results of the installation of the SMM Control Ppi
**/
EFI_STATUS
EFIAPI
SmmControlPeiDriverEntryInit (
IN EFI_PEI_FILE_HANDLE FfsHeader,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
Status = (**PeiServices).InstallPpi (PeiServices, &mPpiList);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Trigger the software SMI
@param[in] Data The value to be set on the software SMI data port
@retval EFI_SUCCESS Function completes successfully
**/
EFI_STATUS
EFIAPI
SmmTrigger (
IN UINT8 Data
)
{
UINT32 OutputData;
UINT32 OutputPort;
UINT16 AcpiBaseAddr;
//
// Read ACPI Base Address
//
AcpiBaseAddr = (UINT16) PcdGet16 (PcdScAcpiIoPortBaseAddress);
//
// Enable the APMC SMI
//
OutputPort = AcpiBaseAddr + R_SMI_EN;
OutputData = IoRead32 ((UINTN) OutputPort);
OutputData |= (B_SMI_EN_APMC | B_SMI_EN_GBL_SMI);
IoWrite32 (
(UINTN) OutputPort,
(UINT32) (OutputData)
);
OutputPort = R_APM_CNT;
OutputData = Data;
//
// Generate the APMC SMI
//
IoWrite8 (
(UINTN) OutputPort,
(UINT8) (OutputData)
);
return EFI_SUCCESS;
}
/**
Clear the SMI status
@param[in] None
@retval EFI_SUCCESS The function completes successfully
@retval EFI_DEVICE_ERROR Something error occurred
**/
EFI_STATUS
EFIAPI
SmmClear (
VOID
)
{
UINT32 OutputData;
UINT32 OutputPort;
UINT16 AcpiBaseAddr;
//
// Read ACPI Base Address
//
AcpiBaseAddr = (UINT16) PcdGet16 (PcdScAcpiIoPortBaseAddress);
//
// Clear the Power Button Override Status Bit, it gates EOS from being set.
//
OutputPort = AcpiBaseAddr + R_ACPI_PM1_STS;
OutputData = B_ACPI_PM1_STS_PRBTNOR;
IoWrite16 (
(UINTN) OutputPort,
(UINT16) (OutputData)
);
//
// Clear the APM SMI Status Bit
//
OutputPort = AcpiBaseAddr + R_SMI_STS;
OutputData = B_SMI_STS_APM;
IoWrite32 (
(UINTN) OutputPort,
(UINT32) (OutputData)
);
//
// Set the EOS Bit
//
OutputPort = AcpiBaseAddr + R_SMI_EN;
OutputData = IoRead32 ((UINTN) OutputPort);
OutputData |= B_SMI_EN_EOS;
IoWrite32 (
(UINTN) OutputPort,
(UINT32) (OutputData)
);
//
// If the EOS bit did not get set, then we've got a problem.
//
DEBUG_CODE (
OutputData = IoRead32 ((UINTN) OutputPort);
if ((OutputData & B_SMI_EN_EOS) != B_SMI_EN_EOS) {
DEBUG ((EFI_D_ERROR, "Bugger, EOS did not get set!\n"));
return EFI_DEVICE_ERROR;
}
);
return EFI_SUCCESS;
}
/**
This routine generates an SMI
@param[in] PeiServices General purpose services available to every PEIM.
@param[in] This The EFI SMM Control ppi instance
@param[in, out] ArgumentBuffer The buffer of argument
@param[in, out] ArgumentBufferSize The size of the argument buffer
@param[in] Periodic Periodic or not
@param[in] ActivationInterval Interval of periodic SMI
@retval EFI Status Describing the result of the operation
@retval EFI_INVALID_PARAMETER Some parameter value passed is not supported
**/
EFI_STATUS
EFIAPI
PeiActivate (
IN EFI_PEI_SERVICES **PeiServices,
IN PEI_SMM_CONTROL_PPI *This,
IN OUT INT8 *ArgumentBuffer OPTIONAL,
IN OUT UINTN *ArgumentBufferSize OPTIONAL,
IN BOOLEAN Periodic OPTIONAL,
IN UINTN ActivationInterval OPTIONAL
)
{
EFI_STATUS Status;
UINT8 Data;
if (Periodic) {
DEBUG ((EFI_D_WARN, "Invalid parameter\n"));
return EFI_INVALID_PARAMETER;
}
if (ArgumentBuffer == NULL) {
Data = 0xFF;
} else {
if (ArgumentBufferSize == NULL || *ArgumentBufferSize != 1) {
return EFI_INVALID_PARAMETER;
}
Data = *ArgumentBuffer;
}
//
// Clear any pending the APM SMI
//
Status = SmmClear ();
if (EFI_ERROR (Status)) {
return Status;
}
return SmmTrigger (Data);
}
/**
This routine clears an SMI
@param[in] PeiServices General purpose services available to every PEIM.
@param[in] This The EFI SMM Control ppi instance
@param[in] Periodic Periodic or not
@retval EFI Status Describing the result of the operation
@retval EFI_INVALID_PARAMETER Some parameter value passed is not supported
**/
EFI_STATUS
EFIAPI
PeiDeactivate (
IN EFI_PEI_SERVICES **PeiServices,
IN PEI_SMM_CONTROL_PPI *This,
IN BOOLEAN Periodic OPTIONAL
)
{
if (Periodic) {
return EFI_INVALID_PARAMETER;
}
return SmmClear ();
}
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