AmdMmSaveState.c File Reference

#include "MmSaveState.h"
#include <Register/Amd/SmramSaveStateMap.h>
#include <Library/BaseLib.h>
#include <Register/Amd/Msr.h>

Go to the source code of this file.

Macros
#define	AMD_MM_SAVE_STATE_REGISTER_SMMREVID_INDEX   1
#define	AMD_MM_SAVE_STATE_REGISTER_MAX_INDEX   2
#define	MM_CPU_OFFSET(Field)   OFFSET_OF (AMD_SMRAM_SAVE_STATE_MAP, Field)

Functions
EFI_STATUS EFIAPI	MmSaveStateReadRegister (IN UINTN CpuIndex, IN EFI_MM_SAVE_STATE_REGISTER Register, IN UINTN Width, OUT VOID *Buffer)
EFI_STATUS EFIAPI	MmSaveStateWriteRegister (IN UINTN CpuIndex, IN EFI_MM_SAVE_STATE_REGISTER Register, IN UINTN Width, IN CONST VOID *Buffer)
UINT8	MmSaveStateGetRegisterLma (VOID)

Variables
CONST CPU_MM_SAVE_STATE_LOOKUP_ENTRY	mCpuWidthOffset []

Detailed Description

Provides services to access SMRAM Save State Map

Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.
Copyright (C) 2023 - 2024 Advanced Micro Devices, Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file AmdMmSaveState.c.

Macro Definition Documentation

AMD_MM_SAVE_STATE_REGISTER_MAX_INDEX

#define AMD_MM_SAVE_STATE_REGISTER_MAX_INDEX   2

Definition at line 16 of file AmdMmSaveState.c.

AMD_MM_SAVE_STATE_REGISTER_SMMREVID_INDEX

#define AMD_MM_SAVE_STATE_REGISTER_SMMREVID_INDEX   1

Definition at line 15 of file AmdMmSaveState.c.

MM_CPU_OFFSET

#define MM_CPU_OFFSET

(

Field

)

OFFSET_OF (AMD_SMRAM_SAVE_STATE_MAP, Field)

Definition at line 19 of file AmdMmSaveState.c.

Function Documentation

MmSaveStateGetRegisterLma()

UINT8 MmSaveStateGetRegisterLma

(

VOID

)

Returns LMA value of the Processor.

Return values

UINT8

returns LMA bit value.

Definition at line 277 of file AmdMmSaveState.c.

MmSaveStateReadRegister()

EFI_STATUS EFIAPI MmSaveStateReadRegister	(	IN UINTN	CpuIndex,
		IN EFI_MM_SAVE_STATE_REGISTER	Register,
		IN UINTN	Width,
		OUT VOID *	Buffer
	)

Read a save state register on the target processor. If this function returns EFI_UNSUPPORTED, then the caller is responsible for reading the MM Save State register.

Parameters

[in]	CpuIndex	The index of the CPU to read the Save State register. The value must be between 0 and the NumberOfCpus field in the System Management System Table (SMST).
[in]	Register	The MM Save State register to read.
[in]	Width	The number of bytes to read from the CPU save state.
[out]	Buffer	Upon return, this holds the CPU register value read from the save state.

Return values

EFI_SUCCESS	The register was read from Save State.
EFI_INVALID_PARAMTER	Buffer is NULL.
EFI_UNSUPPORTED	This function does not support reading Register.
EFI_NOT_FOUND	If desired Register not found.

Definition at line 103 of file AmdMmSaveState.c.

MmSaveStateWriteRegister()

EFI_STATUS EFIAPI MmSaveStateWriteRegister	(	IN UINTN	CpuIndex,
		IN EFI_MM_SAVE_STATE_REGISTER	Register,
		IN UINTN	Width,
		IN CONST VOID *	Buffer
	)

Writes a save state register on the target processor. If this function returns EFI_UNSUPPORTED, then the caller is responsible for writing the MM save state register.

Parameters

[in]	CpuIndex	The index of the CPU to write the MM Save State. The value must be between 0 and the NumberOfCpus field in the System Management System Table (SMST).
[in]	Register	The MM Save State register to write.
[in]	Width	The number of bytes to write to the CPU save state.
[in]	Buffer	Upon entry, this holds the new CPU register value.

Return values

EFI_SUCCESS	The register was written to Save State.
EFI_INVALID_PARAMTER	Buffer is NULL.
EFI_UNSUPPORTED	This function does not support writing Register.
EFI_NOT_FOUND	If desired Register not found.

Definition at line 202 of file AmdMmSaveState.c.

Variable Documentation

mCpuWidthOffset

CONST CPU_MM_SAVE_STATE_LOOKUP_ENTRY mCpuWidthOffset[]

Definition at line 30 of file AmdMmSaveState.c.