Upload BSD-licensed Vlv2TbltDevicePkg and Vlv2DeviceRefCodePkg to
https://svn.code.sf.net/p/edk2/code/trunk/edk2/, which are for MinnowBoard MAX open source project. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: David Wei <david.wei@intel.com> Reviewed-by: Mike Wu <mike.wu@intel.com> Reviewed-by: Hot Tian <hot.tian@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16599 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
David Wei
zwei4
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/** @file
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A helper driver to save information to SMRAM after SMRR is enabled.
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This driver is for ECP platforms.
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Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <PiSmm.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/UefiRuntimeServicesTableLib.h>
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#include <Library/SmmServicesTableLib.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/IoLib.h>
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#include <Protocol/SmmSwDispatch.h>
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#include <Protocol/SmmReadyToLock.h>
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#include <Protocol/SmmControl.h>
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#define SMM_FROM_SMBASE_DRIVER 0x55
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#define SMM_FROM_CPU_DRIVER_SAVE_INFO 0x81
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#define EFI_SMRAM_CPU_NVS_HEADER_GUID \
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{ \
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0x429501d9, 0xe447, 0x40f4, 0x86, 0x7b, 0x75, 0xc9, 0x3a, 0x1d, 0xb5, 0x4e \
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}
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UINT8 mSmiDataRegister;
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BOOLEAN mLocked = FALSE;
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EFI_GUID mSmramCpuNvsHeaderGuid = EFI_SMRAM_CPU_NVS_HEADER_GUID;
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/**
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Dispatch function for a Software SMI handler.
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@param DispatchHandle The handle of this dispatch function.
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@param DispatchContext The pointer to the dispatch function's context.
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The SwSmiInputValue field is filled in
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by the software dispatch driver prior to
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invoking this dispatch function.
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The dispatch function will only be called
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for input values for which it is registered.
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@return None
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**/
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VOID
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EFIAPI
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SmramSaveInfoHandler (
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IN EFI_HANDLE DispatchHandle,
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IN EFI_SMM_SW_DISPATCH_CONTEXT *DispatchContext
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)
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{
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EFI_STATUS Status;
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UINT64 VarData[3];
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UINTN VarSize;
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ASSERT (DispatchContext != NULL);
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ASSERT (DispatchContext->SwSmiInputValue == SMM_FROM_SMBASE_DRIVER);
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if (!mLocked && IoRead8 (mSmiDataRegister) == SMM_FROM_CPU_DRIVER_SAVE_INFO) {
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VarSize = sizeof (VarData);
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Status = gRT->GetVariable (
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L"SmramCpuNvs",
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&mSmramCpuNvsHeaderGuid,
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NULL,
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&VarSize,
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VarData
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);
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if (!EFI_ERROR (Status) && VarSize == sizeof (VarData)) {
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CopyMem (
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(VOID *)(UINTN)(VarData[0]),
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(VOID *)(UINTN)(VarData[1]),
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(UINTN)(VarData[2])
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);
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}
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}
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}
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/**
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Smm Ready To Lock event notification handler.
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It sets a flag indicating that SMRAM has been locked.
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@param[in] Protocol Points to the protocol's unique identifier.
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@param[in] Interface Points to the interface instance.
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@param[in] Handle The handle on which the interface was installed.
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@retval EFI_SUCCESS Notification handler runs successfully.
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**/
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EFI_STATUS
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EFIAPI
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SmmReadyToLockEventNotify (
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IN CONST EFI_GUID *Protocol,
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IN VOID *Interface,
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IN EFI_HANDLE Handle
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)
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{
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mLocked = TRUE;
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return EFI_SUCCESS;
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}
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/**
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Entry point function of this driver.
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@param[in] ImageHandle The firmware allocated handle for the EFI image.
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@param[in] SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval other Some error occurs when executing this entry point.
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**/
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EFI_STATUS
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EFIAPI
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SmramSaveInfoHandlerSmmMain (
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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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EFI_STATUS Status;
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EFI_SMM_SW_DISPATCH_PROTOCOL *SmmSwDispatch;
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EFI_SMM_SW_DISPATCH_CONTEXT SmmSwDispatchContext;
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EFI_HANDLE DispatchHandle;
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EFI_SMM_CONTROL_PROTOCOL *SmmControl;
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EFI_SMM_CONTROL_REGISTER SmmControlRegister;
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VOID *Registration;
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//
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// Get SMI data register
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//
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Status = SystemTable->BootServices->LocateProtocol (
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&gEfiSmmControlProtocolGuid,
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NULL,
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(VOID **)&SmmControl
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);
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ASSERT_EFI_ERROR (Status);
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Status = SmmControl->GetRegisterInfo (SmmControl, &SmmControlRegister);
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ASSERT_EFI_ERROR (Status);
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mSmiDataRegister = SmmControlRegister.SmiDataRegister;
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//
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// Register software SMI handler
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//
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Status = SystemTable->BootServices->LocateProtocol (
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&gEfiSmmSwDispatchProtocolGuid,
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NULL,
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(VOID **)&SmmSwDispatch
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);
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ASSERT_EFI_ERROR (Status);
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SmmSwDispatchContext.SwSmiInputValue = SMM_FROM_SMBASE_DRIVER;
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Status = SmmSwDispatch->Register (
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SmmSwDispatch,
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&SmramSaveInfoHandler,
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&SmmSwDispatchContext,
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&DispatchHandle
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);
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ASSERT_EFI_ERROR (Status);
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//
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// Register SMM Ready To Lock Protocol notification
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//
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Status = gSmst->SmmRegisterProtocolNotify (
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