SmmBase2.h File Reference

Data Structures
struct	_EFI_SMM_BASE2_PROTOCOL

Macros
#define	EFI_SMM_BASE2_PROTOCOL_GUID   EFI_MM_BASE_PROTOCOL_GUID

Typedefs
typedef struct _EFI_SMM_BASE2_PROTOCOL	EFI_SMM_BASE2_PROTOCOL
typedef EFI_STATUS(EFIAPI *	EFI_SMM_INSIDE_OUT2 )(IN CONST EFI_SMM_BASE2_PROTOCOL *This, OUT BOOLEAN *InSmram)
typedef EFI_STATUS(EFIAPI *	EFI_SMM_GET_SMST_LOCATION2 )(IN CONST EFI_SMM_BASE2_PROTOCOL *This, IN OUT EFI_SMM_SYSTEM_TABLE2 **Smst)

Variables
EFI_GUID	gEfiSmmBase2ProtocolGuid

Detailed Description

EFI SMM Base2 Protocol as defined in the PI 1.2 specification.

This protocol is utilized by all SMM drivers to locate the SMM infrastructure services and determine whether the driver is being invoked inside SMRAM or outside of SMRAM.

Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Macro Definition Documentation

#define EFI_SMM_BASE2_PROTOCOL_GUID   EFI_MM_BASE_PROTOCOL_GUID

Typedef Documentation

typedef struct _EFI_SMM_BASE2_PROTOCOL EFI_SMM_BASE2_PROTOCOL

typedef EFI_STATUS(EFIAPI * EFI_SMM_GET_SMST_LOCATION2)(IN CONST EFI_SMM_BASE2_PROTOCOL *This, IN OUT EFI_SMM_SYSTEM_TABLE2 **Smst)

Returns the location of the System Management Service Table (SMST).

This function returns the location of the System Management Service Table (SMST). The use of the API is such that a driver can discover the location of the SMST in its entry point and then cache it in some driver global variable so that the SMST can be invoked in subsequent handlers.

Parameters

[in]	This	The EFI_SMM_BASE2_PROTOCOL instance.
[in,out]	Smst	On return, points to a pointer to the System Management Service Table (SMST).

Return values

EFI_SUCCESS	The operation was successful.
EFI_INVALID_PARAMETER	Smst was invalid.
EFI_UNSUPPORTED	Not in SMM.

typedef EFI_STATUS(EFIAPI * EFI_SMM_INSIDE_OUT2)(IN CONST EFI_SMM_BASE2_PROTOCOL *This, OUT BOOLEAN *InSmram)

Service to indicate whether the driver is currently executing in the SMM Initialization phase.

This service is used to indicate whether the driver is currently executing in the SMM Initialization phase. For SMM drivers, this will return TRUE in InSmram while inside the driver's entry point and otherwise FALSE. For combination SMM/DXE drivers, this will return FALSE in the DXE launch. For the SMM launch, it behaves as an SMM driver.

Parameters

[in]	This	The EFI_SMM_BASE2_PROTOCOL instance.
[out]	InSmram	Pointer to a Boolean which, on return, indicates that the driver is currently executing inside of SMRAM (TRUE) or outside of SMRAM (FALSE).

Return values

EFI_SUCCESS	The call returned successfully.
EFI_INVALID_PARAMETER	InSmram was NULL.

Variable Documentation

EFI_GUID gEfiSmmBase2ProtocolGuid