mirror of https://github.com/acidanthera/audk.git
Add Tper Reset Logic by using MOR bit.
Signed-off-by: Ouyang, Qian <Qian.Ouyang@intel.com>
Reviewed-by: Tian, Feng <feng.tian@intel.com>
Dong, Guo <Guo.dong@intel.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13728 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
qianouyang
parent
90398d5558
commit
504dfa9dbb
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@ -4,7 +4,7 @@
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This driver initilize MemoryOverwriteRequestControl variable. It
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will clear MOR_CLEAR_MEMORY_BIT bit if it is set.
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Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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@ -17,6 +17,50 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#include "TcgMor.h"
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UINT8 mMorControl;
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/**
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Ready to Boot Event notification handler.
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Sequence of OS boot events is measured in this event notification handler.
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@param[in] Event Event whose notification function is being invoked
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@param[in] Context Pointer to the notification function's context
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**/
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VOID
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EFIAPI
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OnReadyToBoot (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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UINTN DataSize;
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if (MOR_CLEAR_MEMORY_VALUE (mMorControl) == 0x0) {
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//
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// MorControl is expected, directly return to avoid unnecessary variable operation
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//
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return ;
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}
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//
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// Clear MOR_CLEAR_MEMORY_BIT
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//
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DEBUG ((EFI_D_INFO, "TcgMor: Clear MorClearMemory bit\n"));
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mMorControl &= 0xFE;
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DataSize = sizeof (mMorControl);
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gRT->SetVariable (
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MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,
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&gEfiMemoryOverwriteControlDataGuid,
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EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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DataSize,
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&mMorControl
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);
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}
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/**
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Entry Point for TCG MOR Control driver.
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@ -34,48 +78,49 @@ MorDriverEntryPoint (
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)
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{
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EFI_STATUS Status;
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UINT8 MorControl;
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UINTN DataSize;
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EFI_EVENT Event;
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///
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/// The firmware is required to create the MemoryOverwriteRequestControl UEFI variable.
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///
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DataSize = sizeof (MorControl);
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DataSize = sizeof (mMorControl);
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Status = gRT->GetVariable (
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MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,
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&gEfiMemoryOverwriteControlDataGuid,
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NULL,
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&DataSize,
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&MorControl
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&mMorControl
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);
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if (EFI_ERROR (Status)) {
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//
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// Set default value to 0
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//
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MorControl = 0;
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mMorControl = 0;
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DEBUG ((EFI_D_INFO, "TcgMor: Create gEfiMemoryOverwriteControlDataGuid!\n"));
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Status = gRT->SetVariable (
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MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,
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&gEfiMemoryOverwriteControlDataGuid,
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EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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DataSize,
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&mMorControl
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);
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ASSERT_EFI_ERROR (Status);
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} else {
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if (MOR_CLEAR_MEMORY_VALUE (MorControl) == 0x0) {
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//
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// MorControl is expected, directly return to avoid unnecessary variable operation
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//
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return EFI_SUCCESS;
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}
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//
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// Clear MOR_CLEAR_MEMORY_BIT
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// Create a Ready To Boot Event and Clear the MorControl bit in the call back function.
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//
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DEBUG ((EFI_D_INFO, "TcgMor: Clear MorClearMemory bit\n"));
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MorControl &= 0xFE;
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}
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DEBUG ((EFI_D_INFO, "TcgMor: Create ReadyToBoot Event for MorControl Bit cleanning!\n"));
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Status = EfiCreateEventReadyToBootEx (
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TPL_CALLBACK,
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OnReadyToBoot,
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NULL,
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&Event
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);
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}
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Status = gRT->SetVariable (
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MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,
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&gEfiMemoryOverwriteControlDataGuid,
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EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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DataSize,
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&MorControl
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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@ -1,7 +1,7 @@
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/** @file
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The header file for TcgMor.
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Copyright (c) 2009, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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@ -22,6 +22,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/UefiRuntimeServicesTableLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiLib.h>
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#endif
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@ -1,7 +1,7 @@
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## @file
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# Component description file for Memory Overwrite Control driver.
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#
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# Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
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# Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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@ -39,6 +39,7 @@
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UefiRuntimeServicesTableLib
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ReportStatusCodeLib
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DebugLib
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UefiLib
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[Guids]
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gEfiMemoryOverwriteControlDataGuid # GUID ALWAYS_CONSUMED
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