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80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/** @file
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EFI SMM Base2 Protocol as defined in the PI 1.2 specification.
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This protocol is utilized by all SMM drivers to locate the SMM infrastructure services and determine
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whether the driver is being invoked inside SMRAM or outside of SMRAM.
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Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _SMM_BASE2_H_
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#define _SMM_BASE2_H_
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#include <Pi/PiSmmCis.h>
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#include <Protocol/MmBase.h>
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#define EFI_SMM_BASE2_PROTOCOL_GUID EFI_MM_BASE_PROTOCOL_GUID
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typedef struct _EFI_SMM_BASE2_PROTOCOL EFI_SMM_BASE2_PROTOCOL;
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/**
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Service to indicate whether the driver is currently executing in the SMM Initialization phase.
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This service is used to indicate whether the driver is currently executing in the SMM Initialization
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phase. For SMM drivers, this will return TRUE in InSmram while inside the driver's entry point and
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otherwise FALSE. For combination SMM/DXE drivers, this will return FALSE in the DXE launch. For the
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SMM launch, it behaves as an SMM driver.
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@param[in] This The EFI_SMM_BASE2_PROTOCOL instance.
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@param[out] InSmram Pointer to a Boolean which, on return, indicates that the driver is
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currently executing inside of SMRAM (TRUE) or outside of SMRAM (FALSE).
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@retval EFI_SUCCESS The call returned successfully.
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@retval EFI_INVALID_PARAMETER InSmram was NULL.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SMM_INSIDE_OUT2)(
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IN CONST EFI_SMM_BASE2_PROTOCOL *This,
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OUT BOOLEAN *InSmram
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)
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;
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/**
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Returns the location of the System Management Service Table (SMST).
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This function returns the location of the System Management Service Table (SMST). The use of the
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API is such that a driver can discover the location of the SMST in its entry point and then cache it in
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some driver global variable so that the SMST can be invoked in subsequent handlers.
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@param[in] This The EFI_SMM_BASE2_PROTOCOL instance.
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@param[in,out] Smst On return, points to a pointer to the System Management Service Table (SMST).
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_INVALID_PARAMETER Smst was invalid.
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@retval EFI_UNSUPPORTED Not in SMM.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_SMM_GET_SMST_LOCATION2)(
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IN CONST EFI_SMM_BASE2_PROTOCOL *This,
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IN OUT EFI_SMM_SYSTEM_TABLE2 **Smst
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)
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;
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///
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/// EFI SMM Base2 Protocol is utilized by all SMM drivers to locate the SMM infrastructure
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/// services and determine whether the driver is being invoked inside SMRAM or outside of SMRAM.
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///
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struct _EFI_SMM_BASE2_PROTOCOL {
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EFI_SMM_INSIDE_OUT2 InSmm;
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EFI_SMM_GET_SMST_LOCATION2 GetSmstLocation;
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};
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extern EFI_GUID gEfiSmmBase2ProtocolGuid;
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#endif
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