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https://github.com/CloverHackyColor/CloverBootloader.git
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109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/** @file
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Parts of the SMM/MM implementation that are specific to traditional MM
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Copyright (c) 2011 - 2018, 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/SmmMemLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include "FaultTolerantWrite.h"
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#include "FaultTolerantWriteSmmCommon.h"
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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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FtwSmmIsBufferOutsideSmmValid (
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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 SmmIsBufferOutsideSmmValid (Buffer, Length);
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}
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/**
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Internal implementation of CRC32. Depending on the execution context
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(traditional SMM or DXE vs standalone MM), this function is implemented
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via a call to the CalculateCrc32 () boot service, or via a library
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call.
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If Buffer is NULL, then ASSERT().
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If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
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@param[in] Buffer A pointer to the buffer on which the 32-bit CRC is
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to be computed.
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@param[in] Length The number of bytes in the buffer Data.
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@retval Crc32 The 32-bit CRC was computed for the data buffer.
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**/
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UINT32
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FtwCalculateCrc32 (
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IN VOID *Buffer,
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IN UINTN Length
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)
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{
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EFI_STATUS Status;
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UINT32 ReturnValue;
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Status = gBS->CalculateCrc32 (Buffer, Length, &ReturnValue);
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ASSERT_EFI_ERROR (Status);
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return ReturnValue;
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}
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/**
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Notify the system that the SMM FTW driver is ready.
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**/
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VOID
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FtwNotifySmmReady (
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VOID
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)
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{
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EFI_HANDLE FtwHandle;
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EFI_STATUS Status;
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FtwHandle = NULL;
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Status = gBS->InstallProtocolInterface (
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&FtwHandle,
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&gEfiSmmFaultTolerantWriteProtocolGuid,
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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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This function is the entry point of the Fault Tolerant Write driver.
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@param[in] ImageHandle A handle for the image that is initializing this driver
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@param[in] SystemTable A pointer to the EFI system table
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@retval EFI_SUCCESS The initialization finished successfully.
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@retval EFI_OUT_OF_RESOURCES Allocate memory error
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@retval EFI_INVALID_PARAMETER Workspace or Spare block does not exist
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**/
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EFI_STATUS
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EFIAPI
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SmmFaultTolerantWriteInitialize (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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return MmFaultTolerantWriteInitialize ();
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}
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