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/** @file
This file declares SMM Control abstraction protocol.
This protocol is used initiate SMI/PMI activations. This protocol could be published by either of
the following:
- A processor driver to abstract the SMI/PMI IPI
- The driver that abstracts the ASIC that is supporting the APM port, such as the ICH in an
Intel chipset
Because of the possibility of performing SMI or PMI IPI transactions, the ability to generate this
event from a platform chipset agent is an optional capability for both IA-32 and Itanium based
systems.
Copyright (c) 2007, 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.
Module Name: SmmControl.h
@par Revision Reference:
This Protocol is defined in Framework of EFI SMM Core Interface Spec
Version 0.9.
**/
#ifndef _SMM_CONTROL_H_
#define _SMM_CONTROL_H_
#include <PiDxe.h>
typedef struct _EFI_SMM_CONTROL_PROTOCOL EFI_SMM_CONTROL_PROTOCOL;
#define EFI_SMM_CONTROL_PROTOCOL_GUID \
{ \
0x8d12e231, 0xc667, 0x4fd1, {0x98, 0xf2, 0x24, 0x49, 0xa7, 0xe7, 0xb2, 0xe5 } \
}
//
// SMM Access specification Data Structures
//
typedef struct {
UINT8 SmiTriggerRegister;
UINT8 SmiDataRegister;
} EFI_SMM_CONTROL_REGISTER;
//
// SMM Control specification member function
//
/**
Invokes SMI activation from either the preboot or runtime environment.
@param This The EFI_SMM_CONTROL_PROTOCOL instance.
@param ArgumentBuffer Optional sized data to pass into the protocol activation.
@param ArgumentBufferSize Optional size of the data.
@param Periodic Optional mechanism to engender a periodic stream.
@param 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.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_ACTIVATE)(
IN EFI_SMM_CONTROL_PROTOCOL *This,
IN OUT INT8 *ArgumentBuffer OPTIONAL,
IN OUT UINTN *ArgumentBufferSize OPTIONAL,
IN BOOLEAN Periodic OPTIONAL,
IN UINTN ActivationInterval OPTIONAL
);
/**
Clears any system state that was created in response to the Active call.
@param This The EFI_SMM_CONTROL_PROTOCOL instance.
@param Periodic 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 source could not be cleared.
@retval EFI_INVALID_PARAMETER The service did not support the Periodic input argument.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_DEACTIVATE)(
IN EFI_SMM_CONTROL_PROTOCOL *This,
IN BOOLEAN Periodic OPTIONAL
);
/**
Provides information on the source register used to generate the SMI.
@param This The EFI_SMM_CONTROL_PROTOCOL instance.
@param SmiRegister Pointer to the SMI register description structure
@retval EFI_SUCCESS The register structure has been returned.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SMM_GET_REGISTER_INFO)(
IN EFI_SMM_CONTROL_PROTOCOL *This,
IN OUT EFI_SMM_CONTROL_REGISTER *SmiRegister
);
/**
@par Protocol Description:
This protocol is used initiate SMI/PMI activations.
@param Trigger
Initiates the SMI/PMI activation.
@param Clear
Quiesces the SMI/PMI activation.
@param GetRegisterInfo
Provides data on the register used as the source of the SMI.
@param MinimumTriggerPeriod
Minimum interval at which the platform can set the period.
**/
struct _EFI_SMM_CONTROL_PROTOCOL {
EFI_SMM_ACTIVATE Trigger;
EFI_SMM_DEACTIVATE Clear;
EFI_SMM_GET_REGISTER_INFO GetRegisterInfo;
UINTN MinimumTriggerPeriod;
};
extern EFI_GUID gEfiSmmControlProtocolGuid;
#endif
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