#include "MmSaveState.h"

Functions
UINTN	MmSaveStateGetRegisterIndex (IN EFI_MM_SAVE_STATE_REGISTER Register, IN UINTN RegOffset)

EFI_STATUS	MmSaveStateReadRegisterByIndex (IN UINTN CpuIndex, IN UINTN RegisterIndex, IN UINTN Width, OUT VOID *Buffer)

Variables
CONST CPU_MM_SAVE_STATE_REGISTER_RANGE	mCpuRegisterRanges []

CONST CPU_MM_SAVE_STATE_LOOKUP_ENTRY	mCpuWidthOffset []

Detailed Description

Provides common supporting function to access SMRAM Save State Map

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file MmSaveStateCommon.c.

Function Documentation

◆ MmSaveStateGetRegisterIndex()

UINTN MmSaveStateGetRegisterIndex	(	IN EFI_MM_SAVE_STATE_REGISTER	Register,
		IN UINTN	RegOffset
	)

Read information from the CPU save state.

Parameters

Register	Specifies the CPU register to read form the save state.
RegOffset	Offset for the next register index.

Return values

0	Register is not valid
>0	Index into mCpuWidthOffset[] associated with Register

Definition at line 35 of file MmSaveStateCommon.c.

◆ MmSaveStateReadRegisterByIndex()

EFI_STATUS MmSaveStateReadRegisterByIndex	(	IN UINTN	CpuIndex,
		IN UINTN	RegisterIndex,
		IN UINTN	Width,
		OUT VOID *	Buffer
	)

Read a CPU Save State register on the target processor.

This function abstracts the differences that whether the CPU Save State register is in the IA32 CPU Save State Map or X64 CPU Save State Map.

This function supports reading a CPU Save State register in SMBase relocation handler.

Parameters

[in]	CpuIndex	Specifies the zero-based index of the CPU save state.
[in]	RegisterIndex	Index into mCpuWidthOffset[] look up table.
[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_NOT_FOUND	The register is not defined for the Save State of Processor.
EFI_INVALID_PARAMTER	This or Buffer is NULL.

Definition at line 73 of file MmSaveStateCommon.c.

Variable Documentation

◆ mCpuRegisterRanges

CONST CPU_MM_SAVE_STATE_REGISTER_RANGE mCpuRegisterRanges[]

Initial value:

= {
  MM_REGISTER_RANGE (EFI_MM_SAVE_STATE_REGISTER_GDTBASE, EFI_MM_SAVE_STATE_REGISTER_LDTINFO),
  MM_REGISTER_RANGE (EFI_MM_SAVE_STATE_REGISTER_ES,      EFI_MM_SAVE_STATE_REGISTER_RIP),
  MM_REGISTER_RANGE (EFI_MM_SAVE_STATE_REGISTER_RFLAGS,  EFI_MM_SAVE_STATE_REGISTER_CR4),
  { (EFI_MM_SAVE_STATE_REGISTER)0,                       (EFI_MM_SAVE_STATE_REGISTER)0,      0}
}

Definition at line 15 of file MmSaveStateCommon.c.

◆ mCpuWidthOffset

CONST CPU_MM_SAVE_STATE_LOOKUP_ENTRY mCpuWidthOffset[]

extern

Lookup table used to retrieve the widths and offsets associated with each supported EFI_MM_SAVE_STATE_REGISTER value

Definition at line 30 of file AmdMmSaveState.c.

Functions