FaultTolerantWriteTraditionalMm.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	SmmFaultTolerantWriteInitialize (IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable)

Detailed Description

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

Copyright (c) 2011 - 2024, Intel Corporation. All rights reserved.
Copyright (c) 2018, Linaro, Ltd. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file FaultTolerantWriteTraditionalMm.c.

Function Documentation

FtwCalculateCrc32()

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

Internal implementation of CRC32. Depending on the execution context (traditional 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 54 of file FaultTolerantWriteTraditionalMm.c.

FtwNotifySmmReady()

VOID FtwNotifySmmReady

(

VOID

)

Notify the system that the SMM FTW driver is ready.

Definition at line 72 of file FaultTolerantWriteTraditionalMm.c.

FtwSmmIsPrimaryBufferValid()

BOOLEAN FtwSmmIsPrimaryBufferValid	(	IN EFI_PHYSICAL_ADDRESS	Buffer,
		IN UINT64	Length
	)

This function checks if the Primary Buffer is valid per processor architecture and does not overlap with SMRAM.

Parameters

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

Return values

TRUE	This buffer is valid per processor architecture and does not overlap with SMRAM.
FALSE	This buffer is not valid per processor architecture or overlaps with SMRAM.

Definition at line 29 of file FaultTolerantWriteTraditionalMm.c.

SmmFaultTolerantWriteInitialize()

EFI_STATUS EFIAPI SmmFaultTolerantWriteInitialize	(	IN EFI_HANDLE	ImageHandle,
		IN EFI_SYSTEM_TABLE *	SystemTable
	)

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]	SystemTable	A pointer to the EFI 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 102 of file FaultTolerantWriteTraditionalMm.c.