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/** @file
Parts of the SMM/MM implementation that are specific to standalone MM
Copyright (c) 2011 - 2024, Intel Corporation. All rights reserved. <BR>
Copyright (c) 2018, Linaro, Ltd. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/MmServicesTableLib.h>
#include <Library/StandaloneMmMemLib.h>
#include "Variable.h"
/**
This function checks if the Primary Buffer (CommBuffer) is valid.
@param Buffer The buffer start address to be checked.
@param Length The buffer length to be checked.
@retval TRUE This buffer is valid.
@retval FALSE This buffer is not valid.
**/
BOOLEAN
VariableSmmIsPrimaryBufferValid (
IN EFI_PHYSICAL_ADDRESS Buffer,
IN UINT64 Length
)
{
return TRUE;
}
/**
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
VariableSmmIsNonPrimaryBufferValid (
IN EFI_PHYSICAL_ADDRESS Buffer,
IN UINT64 Length
)
{
return MmIsBufferOutsideMmValid (Buffer, Length);
}
/**
Notify the system that the SMM variable driver is ready.
**/
VOID
VariableNotifySmmReady (
VOID
)
{
}
/**
Notify the system that the SMM variable write driver is ready.
**/
VOID
VariableNotifySmmWriteReady (
VOID
)
{
EFI_STATUS Status;
EFI_HANDLE Handle;
Handle = NULL;
Status = gMmst->MmInstallProtocolInterface (
&Handle,
&gSmmVariableWriteGuid,
EFI_NATIVE_INTERFACE,
NULL
);
ASSERT_EFI_ERROR (Status);
}
/**
Variable service MM driver entry point.
@param[in] ImageHandle A handle for the image that is initializing this
driver
@param[in] MmSystemTable A pointer to the MM system table
@retval EFI_SUCCESS Variable service successfully initialized.
**/
EFI_STATUS
EFIAPI
VariableServiceInitialize (
IN EFI_HANDLE ImageHandle,
IN EFI_MM_SYSTEM_TABLE *MmSystemTable
)
{
return MmVariableServiceInitialize ();
}
/**
Whether the MOR variable is legitimate or not.
@retval TRUE MOR Variable is legitimate.
@retval FALSE MOR Variable in not legitimate.
**/
BOOLEAN
VariableIsMorVariableLegitimate (
VOID
)
{
return TRUE;
}
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