FaultTolerantWriteStandaloneMm.c File Reference

#include <Library/SmmMemLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include "FaultTolerantWrite.h"
#include "FaultTolerantWriteSmmCommon.h"

Go to the source code of this file.

Functions
BOOLEAN	FtwSmmIsPrimaryBufferValid (IN EFI_PHYSICAL_ADDRESS Buffer, IN UINT64 Length)
UINT32	FtwCalculateCrc32 (IN VOID *Buffer, IN UINTN Length)
VOID	FtwNotifySmmReady (VOID)
EFI_STATUS EFIAPI	StandaloneMmFaultTolerantWriteInitialize (IN EFI_HANDLE ImageHandle, IN EFI_MM_SYSTEM_TABLE *MmSystemTable)

Detailed Description

Parts of the SMM/MM implementation that are specific to standalone MM

Copyright (c) 2010 - 2024, Intel Corporation. All rights reserved.
Copyright (c) 2018, Linaro, Ltd. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file FaultTolerantWriteStandaloneMm.c.

Function Documentation

FtwCalculateCrc32()

UINT32 FtwCalculateCrc32	(	IN VOID *	Buffer,
		IN UINTN	Length
	)

Internal implementation of CRC32. Depending on the execution context (standalone SMM or DXE vs standalone MM), this function is implemented via a call to the CalculateCrc32 () boot service, or via a library call.

If Buffer is NULL, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().

Parameters

[in]	Buffer	A pointer to the buffer on which the 32-bit CRC is to be computed.
[in]	Length	The number of bytes in the buffer Data.

Return values

Crc32

The 32-bit CRC was computed for the data buffer.

Definition at line 50 of file FaultTolerantWriteStandaloneMm.c.

FtwNotifySmmReady()

VOID FtwNotifySmmReady

(

VOID

)

Notify the system that the SMM FTW driver is ready.

Definition at line 62 of file FaultTolerantWriteStandaloneMm.c.

FtwSmmIsPrimaryBufferValid()

BOOLEAN FtwSmmIsPrimaryBufferValid	(	IN EFI_PHYSICAL_ADDRESS	Buffer,
		IN UINT64	Length
	)

This function checks if the Primary Buffer is valid.

Parameters

Buffer	The buffer start address to be checked.
Length	The buffer length to be checked.

Return values

TRUE	This buffer is valid.
FALSE	This buffer is not valid.

Definition at line 26 of file FaultTolerantWriteStandaloneMm.c.

StandaloneMmFaultTolerantWriteInitialize()

EFI_STATUS EFIAPI StandaloneMmFaultTolerantWriteInitialize	(	IN EFI_HANDLE	ImageHandle,
		IN EFI_MM_SYSTEM_TABLE *	MmSystemTable
	)

This function is the entry point of the Fault Tolerant Write driver.

Parameters

[in]	ImageHandle	A handle for the image that is initializing this driver
[in]	MmSystemTable	A pointer to the MM system table

Return values

EFI_SUCCESS	The initialization finished successfully.
EFI_OUT_OF_RESOURCES	Allocate memory error
EFI_INVALID_PARAMETER	Workspace or Spare block does not exist

Definition at line 81 of file FaultTolerantWriteStandaloneMm.c.