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In Standalone MM, there is no notification to MM drivers that variable write is ready. Install gSmmVariableWriteGuid into MM handle database for the notification. Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Ray Ni <ray.ni@intel.com> Signed-off-by: Wei6 Xu <wei6.xu@intel.com>
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/** @file
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Parts of the SMM/MM implementation that are specific to standalone MM
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Copyright (c) 2011 - 2024, Intel Corporation. All rights reserved. <BR>
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Copyright (c) 2018, Linaro, Ltd. All rights reserved. <BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/MmServicesTableLib.h>
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#include <Library/StandaloneMmMemLib.h>
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#include "Variable.h"
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/**
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This function checks if the Primary Buffer (CommBuffer) is valid.
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@param Buffer The buffer start address to be checked.
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@param Length The buffer length to be checked.
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@retval TRUE This buffer is valid.
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@retval FALSE This buffer is not valid.
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**/
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BOOLEAN
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VariableSmmIsPrimaryBufferValid (
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IN EFI_PHYSICAL_ADDRESS Buffer,
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IN UINT64 Length
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)
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{
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return TRUE;
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}
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/**
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This function checks if the buffer is valid per processor architecture and
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does not overlap with SMRAM.
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@param Buffer The buffer start address to be checked.
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@param Length The buffer length to be checked.
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@retval TRUE This buffer is valid per processor architecture and does not
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overlap with SMRAM.
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@retval FALSE This buffer is not valid per processor architecture or overlaps
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with SMRAM.
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**/
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BOOLEAN
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VariableSmmIsNonPrimaryBufferValid (
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IN EFI_PHYSICAL_ADDRESS Buffer,
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IN UINT64 Length
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)
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{
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return MmIsBufferOutsideMmValid (Buffer, Length);
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}
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/**
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Notify the system that the SMM variable driver is ready.
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**/
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VOID
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VariableNotifySmmReady (
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VOID
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)
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{
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}
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/**
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Notify the system that the SMM variable write driver is ready.
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**/
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VOID
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VariableNotifySmmWriteReady (
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VOID
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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Handle = NULL;
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Status = gMmst->MmInstallProtocolInterface (
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&Handle,
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&gSmmVariableWriteGuid,
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EFI_NATIVE_INTERFACE,
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NULL
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);
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ASSERT_EFI_ERROR (Status);
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}
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/**
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Variable service MM driver entry point.
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@param[in] ImageHandle A handle for the image that is initializing this
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driver
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@param[in] MmSystemTable A pointer to the MM system table
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@retval EFI_SUCCESS Variable service successfully initialized.
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**/
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EFI_STATUS
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EFIAPI
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VariableServiceInitialize (
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IN EFI_HANDLE ImageHandle,
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IN EFI_MM_SYSTEM_TABLE *MmSystemTable
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)
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{
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return MmVariableServiceInitialize ();
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}
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/**
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Whether the MOR variable is legitimate or not.
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@retval TRUE MOR Variable is legitimate.
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@retval FALSE MOR Variable in not legitimate.
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**/
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BOOLEAN
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VariableIsMorVariableLegitimate (
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VOID
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)
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{
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return TRUE;
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}
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