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/** @file
Parts of the SMM/MM implementation that are specific to traditional MM
Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved. <BR>
Copyright (c) 2018, Linaro, Ltd. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/SmmMemLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include "FaultTolerantWrite.h"
#include "FaultTolerantWriteSmmCommon.h"
/**
This function checks if the buffer is valid per processor architecture and
does not overlap with SMRAM.
@param Buffer The buffer start address to be checked.
@param Length The buffer length to be checked.
@retval TRUE This buffer is valid per processor architecture and does not
overlap with SMRAM.
@retval FALSE This buffer is not valid per processor architecture or overlaps
with SMRAM.
**/
BOOLEAN
FtwSmmIsBufferOutsideSmmValid (
IN EFI_PHYSICAL_ADDRESS Buffer,
IN UINT64 Length
)
{
return SmmIsBufferOutsideSmmValid (Buffer, 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().
@param[in] Buffer A pointer to the buffer on which the 32-bit CRC is
to be computed.
@param[in] Length The number of bytes in the buffer Data.
@retval Crc32 The 32-bit CRC was computed for the data buffer.
**/
UINT32
FtwCalculateCrc32 (
IN VOID *Buffer,
IN UINTN Length
)
{
EFI_STATUS Status;
UINT32 ReturnValue;
Status = gBS->CalculateCrc32 (Buffer, Length, &ReturnValue);
ASSERT_EFI_ERROR (Status);
return ReturnValue;
}
/**
Notify the system that the SMM FTW driver is ready.
**/
VOID
FtwNotifySmmReady (
VOID
)
{
EFI_HANDLE FtwHandle;
EFI_STATUS Status;
FtwHandle = NULL;
Status = gBS->InstallProtocolInterface (
&FtwHandle,
&gEfiSmmFaultTolerantWriteProtocolGuid,
EFI_NATIVE_INTERFACE,
NULL
);
ASSERT_EFI_ERROR (Status);
}
/**
This function is the entry point of the Fault Tolerant Write driver.
@param[in] ImageHandle A handle for the image that is initializing this driver
@param[in] SystemTable A pointer to the EFI system table
@retval EFI_SUCCESS The initialization finished successfully.
@retval EFI_OUT_OF_RESOURCES Allocate memory error
@retval EFI_INVALID_PARAMETER Workspace or Spare block does not exist
**/
EFI_STATUS
EFIAPI
SmmFaultTolerantWriteInitialize (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
return MmFaultTolerantWriteInitialize ();
}
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