text: /** @file
    This library registers Bds callbacks. It is a default library
    implementation instance of the BDS hook library
  
    Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
    SPDX-License-Identifier: BSD-2-Clause-Patent
  
  **/
  
  #include <Guid/EventGroup.h>
  
  #include <Library/IoLib.h>
  #include <Library/PciLib.h>
  #include <Library/UefiBootManagerLib.h>
  #include <Library/Tcg2PhysicalPresenceLib.h>
  
  #include <Protocol/BlockIo.h>
  #include <Protocol/UsbIo.h>
  #include <Protocol/PciEnumerationComplete.h>
  
  #include "BoardBdsHook.h"
  
  GLOBAL_REMOVE_IF_UNREFERENCED EFI_BOOT_MODE    gBootMode;
  BOOLEAN                                        gPPRequireUIConfirm;
  extern UINTN                                   mBootMenuOptionNumber;
  
  
  GLOBAL_REMOVE_IF_UNREFERENCED USB_CLASS_FORMAT_DEVICE_PATH gUsbClassKeyboardDevicePath = {
    {
      {
        MESSAGING_DEVICE_PATH,
        MSG_USB_CLASS_DP,
        {
          (UINT8) (sizeof (USB_CLASS_DEVICE_PATH)),
          (UINT8) ((sizeof (USB_CLASS_DEVICE_PATH)) >> 8)
        }
      },
      0xffff,           // VendorId
      0xffff,           // ProductId
      CLASS_HID,        // DeviceClass
      SUBCLASS_BOOT,    // DeviceSubClass
      PROTOCOL_KEYBOARD // DeviceProtocol
    },
    gEndEntire
  };
  
  
  //
  // BDS Platform Functions
  //
  BOOLEAN
  IsMorBitSet (
    VOID
    )
  {
    UINTN                     MorControl;
    EFI_STATUS                Status;
    UINTN                     DataSize;
  
    //
    // Check if the MOR bit is set.
    //
    DataSize = sizeof (MorControl);
    Status = gRT->GetVariable (
                    MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME,
                    &gEfiMemoryOverwriteControlDataGuid,
                    NULL,
                    &DataSize,
                    &MorControl
                    );
    if (EFI_ERROR (Status)) {
      DEBUG ((DEBUG_INFO, " gEfiMemoryOverwriteControlDataGuid doesn't exist!!***\n"));
      MorControl = 0;
    } else {
      DEBUG ((DEBUG_INFO, " Get the gEfiMemoryOverwriteControlDataGuid = %x!!***\n", MorControl));
    }
  
    return (BOOLEAN) (MorControl & 0x01);
  }
  
  
  /**
    Prints device paths.
    @param Name           The device name.
    @param DevicePath     The device path to be printed
  **/
  VOID
  EFIAPI
  DumpDevicePath (
    IN CHAR16           *Name,
    IN EFI_DEVICE_PATH  *DevicePath
    )
  {
    CHAR16 *Str;
    Str = ConvertDevicePathToText (DevicePath, TRUE, TRUE);
    DEBUG ((DEBUG_INFO, "%s: %s\n", Name, Str));
    if (Str != NULL) {
      FreePool (Str);
    }
  }
  
  /**
    Return whether the device is trusted console.
  
    @param Device  The device to be tested.
  
    @retval TRUE   The device can be trusted.
    @retval FALSE  The device cannot be trusted.
  **/
  BOOLEAN
  IsTrustedConsole (
    IN CONSOLE_TYPE              ConsoleType,
    IN EFI_DEVICE_PATH_PROTOCOL  *Device
    )
  {
    VOID                      *TrustedConsoleDevicepath;
    EFI_DEVICE_PATH_PROTOCOL  *TempDevicePath;
    EFI_DEVICE_PATH_PROTOCOL  *Instance;
    UINTN                     Size;
    EFI_DEVICE_PATH_PROTOCOL  *ConsoleDevice;
  
    if (Device == NULL) {
      return FALSE;
    }
  
    ConsoleDevice = DuplicateDevicePath (Device);
  
    TrustedConsoleDevicepath = NULL;
  
    switch (ConsoleType) {
      case ConIn:
        TrustedConsoleDevicepath = PcdGetPtr (PcdTrustedConsoleInputDevicePath);
        break;
      case ConOut:
        //
        // Check GOP and remove last node
        //
        TempDevicePath = ConsoleDevice;
        while (!IsDevicePathEndType (TempDevicePath)) {
          if (DevicePathType (TempDevicePath) == ACPI_DEVICE_PATH &&
            DevicePathSubType (TempDevicePath) == ACPI_ADR_DP) {
            SetDevicePathEndNode (TempDevicePath);
            break;
          }
          TempDevicePath = NextDevicePathNode (TempDevicePath);
        }
  
        TrustedConsoleDevicepath = PcdGetPtr (PcdTrustedConsoleOutputDevicePath);
        break;
      default:
        ASSERT (FALSE);
        break;
    }
  
    TempDevicePath = TrustedConsoleDevicepath;
    do {
      Instance = GetNextDevicePathInstance (&TempDevicePath, &Size);
      if (Instance == NULL) {
        break;
      }
  
      if (CompareMem (ConsoleDevice, Instance, Size - END_DEVICE_PATH_LENGTH) == 0) {
        FreePool (Instance);
        FreePool (ConsoleDevice);
        return TRUE;
      }
  
      FreePool (Instance);
    } while (TempDevicePath != NULL);
  
    FreePool (ConsoleDevice);
  
    return FALSE;
  }
  
  
  /**
    Return whether the USB device path is in a short form.
  
    @param DevicePath  The device path to be tested.
  
    @retval TRUE   The device path is in short form.
    @retval FALSE  The device path is not in short form.
  **/
  BOOLEAN
  IsUsbShortForm (
    IN EFI_DEVICE_PATH_PROTOCOL  *DevicePath
    )
  {
    if ((DevicePathType (DevicePath) == MESSAGING_DEVICE_PATH) &&
      ((DevicePathSubType (DevicePath) == MSG_USB_CLASS_DP) ||
      (DevicePathSubType (DevicePath) == MSG_USB_WWID_DP)) ) {
      return TRUE;
    }
  
    return FALSE;
  }
  
  /**
    Connect the USB short form device path.
  
    @param DevicePath   USB short form device path
  
    @retval EFI_SUCCESS           Successfully connected the USB device
    @retval EFI_NOT_FOUND         Cannot connect the USB device
    @retval EFI_INVALID_PARAMETER The device path is invalid.
  **/
  EFI_STATUS
  ConnectUsbShortFormDevicePath (
    IN EFI_DEVICE_PATH_PROTOCOL   *DevicePath
    )
  {
    EFI_STATUS                            Status;
    EFI_HANDLE                            *Handles;
    UINTN                                 HandleCount;
    UINTN                                 Index;
    EFI_PCI_IO_PROTOCOL                   *PciIo;
    UINT8                                 Class[3];
    BOOLEAN                               AtLeastOneConnected;
  
    //
    // Check the passed in parameters
    //
    if (DevicePath == NULL) {
      return EFI_INVALID_PARAMETER;
    }
  
    if (!IsUsbShortForm (DevicePath)) {
      return EFI_INVALID_PARAMETER;
    }
  
    //
    // Find the usb host controller firstly, then connect with the remaining device path
    //
    AtLeastOneConnected = FALSE;
    Status = gBS->LocateHandleBuffer (
                    ByProtocol,
                    &gEfiPciIoProtocolGuid,
                    NULL,
                    &HandleCount,
                    &Handles
                    );
    for (Index = 0; Index < HandleCount; Index++) {
      Status = gBS->HandleProtocol (
                      Handles[Index],
                      &gEfiPciIoProtocolGuid,
                      (VOID **) &PciIo
                      );
      if (!EFI_ERROR (Status)) {
        //
        // Check whether the Pci device is the wanted usb host controller
        //
        Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint8, 0x09, 3, &Class);
        if (!EFI_ERROR (Status) &&
          ((PCI_CLASS_SERIAL == Class[2]) && (PCI_CLASS_SERIAL_USB == Class[1]))) {
          Status = gBS->ConnectController (
                          Handles[Index],
                          NULL,
                          DevicePath,
                          FALSE
                          );
          if (!EFI_ERROR(Status)) {
            AtLeastOneConnected = TRUE;
          }
        }
      }
    }
  
    return AtLeastOneConnected ? EFI_SUCCESS : EFI_NOT_FOUND;
  }
  
  
  /**
    Return whether the Handle is a vga handle.
  
    @param Handle  The handle to be tested.
  
    @retval TRUE   The handle is a vga handle.
    @retval FALSE  The handle is not a vga handle..
  **/
  BOOLEAN
  IsVgaHandle (
    IN EFI_HANDLE Handle
    )
  {
    EFI_PCI_IO_PROTOCOL *PciIo;
    PCI_TYPE00          Pci;
    EFI_STATUS          Status;
  
    Status = gBS->HandleProtocol (
                    Handle,
                    &gEfiPciIoProtocolGuid,
                    (VOID **)&PciIo
                    );
    if (!EFI_ERROR (Status)) {
      Status = PciIo->Pci.Read (
                            PciIo,
                            EfiPciIoWidthUint32,
                            0,
                            sizeof (Pci) / sizeof (UINT32),
                            &Pci
                            );
      if (!EFI_ERROR (Status)) {
        if (IS_PCI_VGA (&Pci) || IS_PCI_OLD_VGA (&Pci)) {
          return TRUE;
        }
      }
    }
    return FALSE;
  }
  
  
  /**
    Return whether the device path points to a video controller.
  
    @param DevicePath  The device path to be tested.
  
    @retval TRUE   The device path points to a video controller.
    @retval FALSE  The device path does not point to a video controller.
  **/
  EFI_HANDLE
  IsVideoController (
    IN EFI_DEVICE_PATH_PROTOCOL  *DevicePath
    )
  {
    EFI_DEVICE_PATH_PROTOCOL  *DupDevicePath;
    EFI_DEVICE_PATH_PROTOCOL  *TempDevicePath;
    EFI_STATUS                Status;
    EFI_HANDLE                DeviceHandle;
  
    DupDevicePath = DuplicateDevicePath (DevicePath);
    ASSERT (DupDevicePath != NULL);
    if (DupDevicePath == NULL) {
      return NULL;
    }
  
    TempDevicePath = DupDevicePath;
    Status = gBS->LocateDevicePath (
                    &gEfiDevicePathProtocolGuid,
                    &TempDevicePath,
                    &DeviceHandle
                    );
    FreePool (DupDevicePath);
    if (EFI_ERROR (Status)) {
      return NULL;
    }
  
    if (IsVgaHandle (DeviceHandle)) {
      return DeviceHandle;
    } else {
      return NULL;
    }
  }
  
  
  /**
    Return whether the device path is a GOP device path.
  
    @param DevicePath  The device path to be tested.
  
    @retval TRUE   The device path is a GOP device path.
    @retval FALSE  The device on the device path is not a GOP device path.
  **/
  BOOLEAN
  IsGopDevicePath (
    IN EFI_DEVICE_PATH_PROTOCOL  *DevicePath
    )
  {
    while (!IsDevicePathEndType (DevicePath)) {
      if (DevicePathType (DevicePath) == ACPI_DEVICE_PATH &&
          DevicePathSubType (DevicePath) == ACPI_ADR_DP) {
        return TRUE;
      }
      DevicePath = NextDevicePathNode (DevicePath);
    }
    return FALSE;
  }
  
  
  /**
    Remove all GOP device path instance from DevicePath and add the Gop to the DevicePath.
  
    @param DevicePath  The device path to be removed
    @param Gop         The device path to be added.
  
    @retval Return     The updated device path.
  **/
  EFI_DEVICE_PATH_PROTOCOL *
  UpdateGopDevicePath (
    EFI_DEVICE_PATH_PROTOCOL *DevicePath,
    EFI_DEVICE_PATH_PROTOCOL *Gop
    )
  {
    UINTN                    Size;
    UINTN                    GopSize;
    EFI_DEVICE_PATH_PROTOCOL *Temp;
    EFI_DEVICE_PATH_PROTOCOL *Return;
    EFI_DEVICE_PATH_PROTOCOL *Instance;
    BOOLEAN                  Exist;
  
    Exist = FALSE;
    Return = NULL;
    GopSize = GetDevicePathSize (Gop);
    do {
      Instance = GetNextDevicePathInstance (&DevicePath, &Size);
      if (Instance == NULL) {
        break;
      }
      if (!IsGopDevicePath (Instance) ||
          (Size == GopSize && CompareMem (Instance, Gop, GopSize) == 0)
         ) {
        if (Size == GopSize && CompareMem (Instance, Gop, GopSize) == 0) {
          Exist = TRUE;
        }
        Temp = Return;
        Return = AppendDevicePathInstance (Return, Instance);
        if (Temp != NULL) {
          FreePool (Temp);
        }
      }
      FreePool (Instance);
    } while (DevicePath != NULL);
  
    if (!Exist) {
      Temp = Return;
      Return = AppendDevicePathInstance (Return, Gop);
      if (Temp != NULL) {
        FreePool (Temp);
      }
    }
    return Return;
  }
  
  
  /**
    Get Graphics Controller Handle.
  
    @param NeedTrustedConsole    The flag to determine if trusted console
    or non trusted console should be returned
  
    @retval NULL                  Console not found
    @retval PciHandles            Successfully located
  **/
  EFI_HANDLE
  EFIAPI
  GetGraphicsController (
    IN BOOLEAN    NeedTrustedConsole
    )
  {
    EFI_STATUS                Status;
    UINTN                     Index;
    EFI_HANDLE                *PciHandles;
    UINTN                     PciHandlesSize;
    EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
  
    Status = gBS->LocateHandleBuffer (
                    ByProtocol,
                    &gEfiPciIoProtocolGuid,
                    NULL,
                    &PciHandlesSize,
                    &PciHandles
                    );
    if (EFI_ERROR (Status)) {
      return NULL;
    }
  
    for (Index = 0; Index < PciHandlesSize; Index++) {
      Status = gBS->HandleProtocol (
                      PciHandles[Index],
                      &gEfiDevicePathProtocolGuid,
                      (VOID **) &DevicePath
                      );
      if (EFI_ERROR(Status)) {
        continue;
      }
      if (!IsVgaHandle (PciHandles[Index])) {
        continue;
      }
      if ((NeedTrustedConsole && IsTrustedConsole (ConOut, DevicePath)) ||
          ((!NeedTrustedConsole) && (!IsTrustedConsole (ConOut, DevicePath)))) {
        return PciHandles[Index];
      }
    }
  
    return NULL;
  }
  
  
  /**
    Updates Graphic ConOut variable.
  
    @param NeedTrustedConsole    The flag that determines if trusted console
    or non trusted console should be returned
  **/
  VOID
  UpdateGraphicConOut (
    IN BOOLEAN    NeedTrustedConsole
    )
  {
    EFI_HANDLE                          GraphicsControllerHandle;
    EFI_DEVICE_PATH_PROTOCOL            *GopDevicePath;
    EFI_DEVICE_PATH_PROTOCOL            *ConOutDevicePath;
    EFI_DEVICE_PATH_PROTOCOL            *UpdatedConOutDevicePath;
  
    //
    // Update ConOut variable
    //
    GraphicsControllerHandle = GetGraphicsController (NeedTrustedConsole);
    if (GraphicsControllerHandle != NULL) {
      //
      // Connect the GOP driver
      //
      gBS->ConnectController (GraphicsControllerHandle, NULL, NULL, TRUE);
  
      //
      // Get the GOP device path
      // NOTE: We may get a device path that contains Controller node in it.
      //
      GopDevicePath = EfiBootManagerGetGopDevicePath (GraphicsControllerHandle);
      if (GopDevicePath != NULL) {
        GetEfiGlobalVariable2 (L"ConOut", (VOID **)&ConOutDevicePath, NULL);
        UpdatedConOutDevicePath = UpdateGopDevicePath (ConOutDevicePath, GopDevicePath);
        if (ConOutDevicePath != NULL) {
          FreePool (ConOutDevicePath);
        }
        FreePool (GopDevicePath);
        gRT->SetVariable (
                        L"ConOut",
                        &gEfiGlobalVariableGuid,
                        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS,
                        GetDevicePathSize (UpdatedConOutDevicePath),
                        UpdatedConOutDevicePath
                        );
      }
    }
  }
  
  
  /**
    The function connects the trusted consoles.
  **/
  VOID
  ConnectTrustedConsole (
    VOID
    )
  {
    EFI_DEVICE_PATH_PROTOCOL     *Consoles;
    EFI_DEVICE_PATH_PROTOCOL     *TempDevicePath;
    EFI_DEVICE_PATH_PROTOCOL     *Instance;
    EFI_DEVICE_PATH_PROTOCOL     *Next;
    UINTN                        Size;
    UINTN                        Index;
    EFI_HANDLE                   Handle;
    EFI_STATUS                   Status;
    CHAR16                       *ConsoleVar[] = {L"ConIn", L"ConOut"};
    VOID                         *TrustedConsoleDevicepath;
  
    TrustedConsoleDevicepath = PcdGetPtr (PcdTrustedConsoleInputDevicePath);
    DumpDevicePath (L"TrustedConsoleIn", TrustedConsoleDevicepath);
    TrustedConsoleDevicepath = PcdGetPtr (PcdTrustedConsoleOutputDevicePath);
    DumpDevicePath (L"TrustedConsoleOut", TrustedConsoleDevicepath);
  
    for (Index = 0; Index < sizeof (ConsoleVar) / sizeof (ConsoleVar[0]); Index++) {
  
      GetEfiGlobalVariable2 (ConsoleVar[Index], (VOID **)&Consoles, NULL);
  
      TempDevicePath = Consoles;
      do {
        Instance = GetNextDevicePathInstance (&TempDevicePath, &Size);
        if (Instance == NULL) {
          break;
        }
        if (IsTrustedConsole (Index, Instance)) {
          if (IsUsbShortForm (Instance)) {
            ConnectUsbShortFormDevicePath (Instance);
          } else {
            for (Next = Instance; !IsDevicePathEnd (Next); Next = NextDevicePathNode (Next)) {
              if (DevicePathType (Next) == ACPI_DEVICE_PATH && DevicePathSubType (Next) == ACPI_ADR_DP) {
                break;
              } else if (DevicePathType (Next) == HARDWARE_DEVICE_PATH &&
                         DevicePathSubType (Next) == HW_CONTROLLER_DP &&
                         DevicePathType (NextDevicePathNode (Next)) == ACPI_DEVICE_PATH &&
                         DevicePathSubType (NextDevicePathNode (Next)) == ACPI_ADR_DP
                         ) {
                break;
              }
            }
            if (!IsDevicePathEnd (Next)) {
              SetDevicePathEndNode (Next);
              Status = EfiBootManagerConnectDevicePath (Instance, &Handle);
              if (!EFI_ERROR (Status)) {
                gBS->ConnectController (Handle, NULL, NULL, TRUE);
              }
            } else {
              EfiBootManagerConnectDevicePath (Instance, NULL);
            }
          }
        }
        FreePool (Instance);
      } while (TempDevicePath != NULL);
  
      if (Consoles != NULL) {
        FreePool (Consoles);
      }
    }
  }
  
  
  /**
    The function connects the trusted Storages.
  **/
  VOID
  ConnectTrustedStorage (
    VOID
    )
  {
    VOID                      *TrustedStorageDevicepath;
    EFI_DEVICE_PATH_PROTOCOL  *TempDevicePath;
    EFI_DEVICE_PATH_PROTOCOL  *Instance;
    UINTN                     Size;
    EFI_DEVICE_PATH_PROTOCOL  *TempStorageDevicePath;
    EFI_STATUS                Status;
    EFI_HANDLE                DeviceHandle;
  
    TrustedStorageDevicepath = PcdGetPtr (PcdTrustedStorageDevicePath);
    DumpDevicePath (L"TrustedStorage", TrustedStorageDevicepath);
  
    TempDevicePath = TrustedStorageDevicepath;
    do {
      Instance = GetNextDevicePathInstance (&TempDevicePath, &Size);
      if (Instance == NULL) {
        break;
      }
  
      EfiBootManagerConnectDevicePath (Instance, NULL);
  
      TempStorageDevicePath = Instance;
  
      Status = gBS->LocateDevicePath (
                      &gEfiDevicePathProtocolGuid,
                      &TempStorageDevicePath,
                      &DeviceHandle
                      );
      if (!EFI_ERROR (Status)) {
        gBS->ConnectController (DeviceHandle, NULL, NULL, FALSE);
      }
  
      FreePool (Instance);
    } while (TempDevicePath != NULL);
  }
  
  
  /**
    Check if current BootCurrent variable is internal shell boot option.
  
    @retval  TRUE         BootCurrent is internal shell.
    @retval  FALSE        BootCurrent is not internal shell.
  **/
  BOOLEAN
  BootCurrentIsInternalShell (
    VOID
    )
  {
    UINTN                         VarSize;
    UINT16                        BootCurrent;
    CHAR16                        BootOptionName[16];
    UINT8                         *BootOption;
    UINT8                         *Ptr;
    BOOLEAN                       Result;
    EFI_STATUS                    Status;
    EFI_DEVICE_PATH_PROTOCOL      *TempDevicePath;
    EFI_DEVICE_PATH_PROTOCOL      *LastDeviceNode;
    EFI_GUID                      *GuidPoint;
  
    BootOption = NULL;
    Result     = FALSE;
  
    //
    // Get BootCurrent variable
    //
    VarSize = sizeof (UINT16);
    Status = gRT->GetVariable (
                    L"BootCurrent",
                    &gEfiGlobalVariableGuid,
                    NULL,
                    &VarSize,
                    &BootCurrent
                    );
    if (EFI_ERROR (Status)) {
      return FALSE;
    }
  
    //
    // Create boot option Bootxxxx from BootCurrent
    //
    UnicodeSPrint (BootOptionName, sizeof(BootOptionName), L"Boot%04X", BootCurrent);
  
    GetEfiGlobalVariable2 (BootOptionName, (VOID **) &BootOption, &VarSize);
    if (BootOption == NULL || VarSize == 0) {
      return FALSE;
    }
  
    Ptr = BootOption;
    Ptr += sizeof (UINT32);
    Ptr += sizeof (UINT16);
    Ptr += StrSize ((CHAR16 *) Ptr);
    TempDevicePath = (EFI_DEVICE_PATH_PROTOCOL *) Ptr;
    LastDeviceNode = TempDevicePath;
    while (!IsDevicePathEnd (TempDevicePath)) {
      LastDeviceNode = TempDevicePath;
      TempDevicePath = NextDevicePathNode (TempDevicePath);
    }
    GuidPoint = EfiGetNameGuidFromFwVolDevicePathNode (
                  (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LastDeviceNode
                  );
    if ((GuidPoint != NULL) &&
      ((CompareGuid (GuidPoint, &gUefiShellFileGuid)))) {
      //
      // if this option is internal shell, return TRUE
      //
      Result = TRUE;
    }
  
    if (BootOption != NULL) {
      FreePool (BootOption);
      BootOption = NULL;
    }
  
    return Result;
  }
  
  /**
    This function will change video resolution and text mode
    for internl shell when internal shell is launched.
  
    @param   None.
  
    @retval  EFI_SUCCESS  Mode is changed successfully.
    @retval  Others       Mode failed to changed.
  **/
  EFI_STATUS
  EFIAPI
  ChangeModeForInternalShell (
    VOID
    )
  {
    EFI_GRAPHICS_OUTPUT_PROTOCOL          *GraphicsOutput;
    EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL       *SimpleTextOut;
    UINTN                                 SizeOfInfo;
    EFI_GRAPHICS_OUTPUT_MODE_INFORMATION  *Info;
    UINT32                                MaxGopMode;
    UINT32                                MaxTextMode;
    UINT32                                ModeNumber;
    UINTN                                 HandleCount;
    EFI_HANDLE                            *HandleBuffer;
    EFI_STATUS                            Status;
    UINTN                                 Index;
    UINTN                                 CurrentColumn;
    UINTN                                 CurrentRow;
  
    //
    // Internal shell mode
    //
    UINT32         mShellModeColumn;
    UINT32         mShellModeRow;
    UINT32         mShellHorizontalResolution;
    UINT32         mShellVerticalResolution;
  
  
    //
    // Get user defined text mode for internal shell only once.
    //
    mShellHorizontalResolution = PcdGet32 (PcdSetupVideoHorizontalResolution);
    mShellVerticalResolution   = PcdGet32 (PcdSetupVideoVerticalResolution);
    mShellModeColumn           = PcdGet32 (PcdSetupConOutColumn);
    mShellModeRow              = PcdGet32 (PcdSetupConOutRow);
  
  
    Status = gBS->HandleProtocol (
                    gST->ConsoleOutHandle,
                    &gEfiGraphicsOutputProtocolGuid,
                    (VOID**)&GraphicsOutput
                    );
    if (EFI_ERROR (Status)) {
      GraphicsOutput = NULL;
    }
  
    Status = gBS->HandleProtocol (
                    gST->ConsoleOutHandle,
                    &gEfiSimpleTextOutProtocolGuid,
                    (VOID**)&SimpleTextOut
                    );
    if (EFI_ERROR (Status)) {
      SimpleTextOut = NULL;
    }
  
    if ((GraphicsOutput == NULL) || (SimpleTextOut == NULL)) {
      return EFI_UNSUPPORTED;
    }
  
    MaxGopMode  = GraphicsOutput->Mode->MaxMode;
    MaxTextMode = SimpleTextOut->Mode->MaxMode;
  
    //
    // 1. If current video resolution is same with new video resolution,
    //    video resolution need not be changed.
    //    1.1. If current text mode is same with new text mode, text mode need not be change.
    //    1.2. If current text mode is different with new text mode, text mode need be change to new text mode.
    // 2. If current video resolution is different with new video resolution, we need restart whole console drivers.
    //
    for (ModeNumber = 0; ModeNumber < MaxGopMode; ModeNumber++) {
      Status = GraphicsOutput->QueryMode (
                         GraphicsOutput,
                         ModeNumber,
                         &SizeOfInfo,
                         &Info
                         );
      if (!EFI_ERROR (Status)) {
        if ((Info->HorizontalResolution == mShellHorizontalResolution) &&
          (Info->VerticalResolution == mShellVerticalResolution)) {
          if ((GraphicsOutput->Mode->Info->HorizontalResolution == mShellHorizontalResolution) &&
            (GraphicsOutput->Mode->Info->VerticalResolution == mShellVerticalResolution)) {
            //
            // If current video resolution is same with new resolution,
            // then check if current text mode is same with new text mode.
            //
            Status = SimpleTextOut->QueryMode (SimpleTextOut, SimpleTextOut->Mode->Mode, &CurrentColumn, &CurrentRow);
            ASSERT_EFI_ERROR (Status);
            if (CurrentColumn == mShellModeColumn && CurrentRow == mShellModeRow) {
              //
              // Current text mode is same with new text mode, text mode need not be change.
              //
              FreePool (Info);
              return EFI_SUCCESS;
            } else {
              //
              // Current text mode is different with new text mode, text mode need be change to new text mode.
              //
              for (Index = 0; Index < MaxTextMode; Index++) {
                Status = SimpleTextOut->QueryMode (SimpleTextOut, Index, &CurrentColumn, &CurrentRow);
                if (!EFI_ERROR(Status)) {
                  if ((CurrentColumn == mShellModeColumn) && (CurrentRow == mShellModeRow)) {
                    //
                    // New text mode is supported, set it.
                    //
                    Status = SimpleTextOut->SetMode (SimpleTextOut, Index);
                    ASSERT_EFI_ERROR (Status);
                    //
                    // Update text mode PCD.
                    //
                    Status = PcdSet32S (PcdConOutColumn, mShellModeColumn);
                    ASSERT_EFI_ERROR (Status);
  
                    Status = PcdSet32S (PcdConOutRow, mShellModeRow);
                    ASSERT_EFI_ERROR (Status);
  
                    FreePool (Info);
                    return EFI_SUCCESS;
                  }
                }
              }
              if (Index == MaxTextMode) {
                //
                // If new text mode is not supported, return error.
                //
                FreePool (Info);
                return EFI_UNSUPPORTED;
              }
            }
          } else {
            FreePool (Info);
            //
            // If current video resolution is not same with the new one, set new video resolution.
            // In this case, the driver which produces simple text out need be restarted.
            //
            Status = GraphicsOutput->SetMode (GraphicsOutput, ModeNumber);
            if (!EFI_ERROR (Status)) {
              //
              // Set PCD to restart GraphicsConsole and Consplitter to change video resolution
              // and produce new text mode based on new resolution.
              //
              Status = PcdSet32S (PcdVideoHorizontalResolution, mShellHorizontalResolution);
              ASSERT_EFI_ERROR (Status);
  
              Status = PcdSet32S (PcdVideoVerticalResolution, mShellVerticalResolution);
              ASSERT_EFI_ERROR (Status);
  
              Status = PcdSet32S (PcdConOutColumn, mShellModeColumn);
              ASSERT_EFI_ERROR (Status);
  
              Status = PcdSet32S (PcdConOutRow, mShellModeRow);
              ASSERT_EFI_ERROR (Status);
  
              Status = gBS->LocateHandleBuffer (
                               ByProtocol,
                               &gEfiSimpleTextOutProtocolGuid,
                               NULL,
                               &HandleCount,
                               &HandleBuffer
                               );
              if (!EFI_ERROR (Status)) {
                for (Index = 0; Index < HandleCount; Index++) {
                  gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);
                }
                for (Index = 0; Index < HandleCount; Index++) {
                  gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);
                }
                if (HandleBuffer != NULL) {
                  FreePool (HandleBuffer);
                }
                break;
              }
            }
          }
        }
        FreePool (Info);
      }
    }
  
    if (ModeNumber == MaxGopMode) {
      //
      // If the new resolution is not supported, return error.
      //
      return EFI_UNSUPPORTED;
    }
  
    return EFI_SUCCESS;
  }
  
  
  /**
    The function connects the trusted consoles and then call the PP processing library interface.
  **/
  VOID
  ProcessTcgPp (
    VOID
    )
  {
    gPPRequireUIConfirm |= Tcg2PhysicalPresenceLibNeedUserConfirm();
  
    if (gPPRequireUIConfirm) {
      ConnectTrustedConsole ();
    }
  
    Tcg2PhysicalPresenceLibProcessRequest (NULL);
  }
  
  
  /**
    The function connects the trusted storage to perform TPerReset.
  **/
  VOID
  ProcessTcgMor (
    VOID
    )
  {
    if (IsMorBitSet ()) {
      ConnectTrustedConsole();
      ConnectTrustedStorage();
    }
  }
  
  
  /**
    Update the ConIn variable with USB Keyboard device path,if its not already exists in ConIn
  **/
  VOID
  EnumUsbKeyboard (
    VOID
    )
  {
    DEBUG ((DEBUG_INFO, "[EnumUsbKeyboard]\n"));
    EfiBootManagerUpdateConsoleVariable (ConIn, (EFI_DEVICE_PATH_PROTOCOL *) &gUsbClassKeyboardDevicePath, NULL);
    //
    // Append Usb Keyboard short form DevicePath into "ConInDev"
    //
    EfiBootManagerUpdateConsoleVariable (ConInDev, (EFI_DEVICE_PATH_PROTOCOL *) &gUsbClassKeyboardDevicePath, NULL);
  }
  
  
  /**
    Connect with predeined platform connect sequence,
    the OEM/IBV can customize with their own connect sequence.
  
    @param[in] BootMode          Boot mode of this boot.
  **/
  VOID
  ConnectSequence (
    IN EFI_BOOT_MODE         BootMode
    )
  {
    EfiBootManagerConnectAll ();
  }
  
  
  /**
    The function is to consider the boot order which is not in our expectation.
    In the case that we need to re-sort the boot option.
  
    @retval  TRUE         Need to sort Boot Option.
    @retval  FALSE        Don't need to sort Boot Option.
  **/
  BOOLEAN
  IsNeedSortBootOption (
    VOID
    )
  {
    EFI_BOOT_MANAGER_LOAD_OPTION  *BootOptions;
    UINTN                         BootOptionCount;
  
    BootOptions = EfiBootManagerGetLoadOptions (&BootOptionCount, LoadOptionTypeBoot);
  
    //
    // If setup is the first priority in boot option, we need to sort boot option.
    //
    if ((BootOptionCount > 1) &&
      (((StrnCmp (BootOptions->Description, L"Enter Setup", StrLen (L"Enter Setup"))) == 0) ||
      ((StrnCmp (BootOptions->Description, L"BootManagerMenuApp", StrLen (L"BootManagerMenuApp"))) == 0))) {
      return TRUE;
    }
  
    return FALSE;
  }
  
  
  /**
    Connects Root Bridge
   **/
  VOID
  ConnectRootBridge (
    BOOLEAN Recursive
    )
  {
    UINTN                            RootBridgeHandleCount;
    EFI_HANDLE                       *RootBridgeHandleBuffer;
    UINTN                            RootBridgeIndex;
  
    RootBridgeHandleCount = 0;
    gBS->LocateHandleBuffer (
           ByProtocol,
           &gEfiPciRootBridgeIoProtocolGuid,
           NULL,
           &RootBridgeHandleCount,
           &RootBridgeHandleBuffer
           );
    for (RootBridgeIndex = 0; RootBridgeIndex < RootBridgeHandleCount; RootBridgeIndex++) {
      gBS->ConnectController (RootBridgeHandleBuffer[RootBridgeIndex], NULL, NULL, Recursive);
    }
  }
  
  VOID
  AddConsoleVariable (
    IN CONSOLE_TYPE              ConsoleType,
    IN EFI_DEVICE_PATH           *ConsoleDevicePath
    )
  {
    EFI_DEVICE_PATH           *TempDevicePath;
    EFI_DEVICE_PATH           *Instance;
    UINTN                     Size;
    EFI_HANDLE                GraphicsControllerHandle;
    EFI_DEVICE_PATH           *GopDevicePath;
  
    TempDevicePath = ConsoleDevicePath;
    do {
      Instance = GetNextDevicePathInstance (&TempDevicePath, &Size);
      if (Instance == NULL) {
        break;
      }
  
      switch (ConsoleType) {
        case ConIn:
          if (IsUsbShortForm (Instance)) {
            //
            // Append Usb Keyboard short form DevicePath into "ConInDev"
            //
            EfiBootManagerUpdateConsoleVariable (ConInDev, Instance, NULL);
          }
          EfiBootManagerUpdateConsoleVariable (ConsoleType, Instance, NULL);
          break;
        case ConOut:
          GraphicsControllerHandle = IsVideoController (Instance);
          if (GraphicsControllerHandle == NULL) {
            EfiBootManagerUpdateConsoleVariable (ConsoleType, Instance, NULL);
          } else {
            //
            // Connect the GOP driver
            //
            gBS->ConnectController (GraphicsControllerHandle, NULL, NULL, TRUE);
            //
            // Get the GOP device path
            // NOTE: We may get a device path that contains Controller node in it.
            //
            GopDevicePath = EfiBootManagerGetGopDevicePath (GraphicsControllerHandle);
            if (GopDevicePath != NULL) {
              EfiBootManagerUpdateConsoleVariable (ConsoleType, GopDevicePath, NULL);
            }
          }
          break;
        default:
          ASSERT(FALSE);
          break;
      }
  
      FreePool (Instance);
    } while (TempDevicePath != NULL);
  }
  
  
  /**
    This is the callback function for PCI ENUMERATION COMPLETE.
  
    @param[in] Event      The Event this notify function registered to.
    @param[in] Context    Pointer to the context data registered to the Event.
  **/
  VOID
  EFIAPI
  BdsPciEnumCompleteCallback (
    IN EFI_EVENT    Event,
    IN VOID         *Context
    )
  {
    EFI_STATUS                          Status;
    VOID                                *ProtocolPointer;
    EFI_DEVICE_PATH_PROTOCOL            *VarConOut;
    EFI_DEVICE_PATH_PROTOCOL            *VarConIn;
  
    Status                     = EFI_SUCCESS;
  
    //
    // Check if this is first time called by EfiCreateProtocolNotifyEvent() or not,
    // if it is, we will skip it until real event is triggered
    //
    Status = gBS->LocateProtocol (&gEfiPciEnumerationCompleteProtocolGuid, NULL, (VOID **) &ProtocolPointer);
    if (EFI_SUCCESS != Status) {
      return;
    }
    //gBS->CloseEvent (Event);
  
  
    DEBUG ((DEBUG_INFO, "Event BdsPciEnumCompleteCallback callback starts\n"));
  
    gBootMode                  = GetBootModeHob ();
  
    //
    // Fill ConIn/ConOut in Full Configuration boot mode
    //
    DEBUG ((DEBUG_INFO, "PlatformBootManagerInit - %x\n", gBootMode));
  
  
    if (gBootMode == BOOT_WITH_FULL_CONFIGURATION ||
        gBootMode == BOOT_WITH_DEFAULT_SETTINGS ||
        gBootMode == BOOT_WITH_FULL_CONFIGURATION_PLUS_DIAGNOSTICS ||
        gBootMode == BOOT_IN_RECOVERY_MODE) {
  
      GetEfiGlobalVariable2 (L"ConOut", (VOID **)&VarConOut, NULL);
      if (VarConOut != NULL) {
        FreePool (VarConOut);
      }
  
      GetEfiGlobalVariable2 (L"ConIn", (VOID **)&VarConIn, NULL);
      if (VarConIn  != NULL) {
        FreePool (VarConIn);
      }
  
      //
      // Only fill ConIn/ConOut when ConIn/ConOut is empty because we may drop to Full Configuration boot mode in non-first boot
      //
      if (VarConOut == NULL || VarConIn == NULL) {
        if (PcdGetSize (PcdTrustedConsoleOutputDevicePath) >= sizeof(EFI_DEVICE_PATH_PROTOCOL)) {
          AddConsoleVariable (ConOut, PcdGetPtr (PcdTrustedConsoleOutputDevicePath));
        }
        if (PcdGetSize (PcdTrustedConsoleInputDevicePath) >= sizeof(EFI_DEVICE_PATH_PROTOCOL)) {
          AddConsoleVariable (ConIn, PcdGetPtr (PcdTrustedConsoleInputDevicePath));
        }
      }
    }
  
    //
    // Enumerate USB keyboard
    //
    EnumUsbKeyboard ();
  
    //
    // For trusted console it must be handled here.
    //
    UpdateGraphicConOut (TRUE);
  
    //
    // Register Boot Options
    //
    RegisterDefaultBootOption ();
  
    //
    // Register Static Hot keys
    //
    RegisterStaticHotkey ();
  
    //
    // Process Physical Preo
    //
    PERF_START_EX(NULL,"EventRec", NULL, AsmReadTsc(), 0x7010);
    if (PcdGetBool (PcdTpm2Enable)) {
      ProcessTcgPp ();
      ProcessTcgMor ();
    }
    PERF_END_EX(NULL,"EventRec", NULL, AsmReadTsc(), 0x7011);
  
    //
    // Perform memory test
    // We should make all UEFI memory and GCD information populated before ExitPmAuth.
    // SMM may consume these information.
    //
    MemoryTest((EXTENDMEM_COVERAGE_LEVEL) PcdGet32 (PcdPlatformMemoryCheckLevel));
  }
  
  /**
    This is the callback function for Smm Ready To Lock.
  
    @param[in] Event      The Event this notify function registered to.
    @param[in] Context    Pointer to the context data registered to the Event.
  **/
  VOID
  EFIAPI
  BdsSmmReadyToLockCallback (
    IN EFI_EVENT    Event,
    IN VOID         *Context
    )
  {
    VOID                *ProtocolPointer;
    EFI_STATUS          Status;
    //
    // Check if this is first time called by EfiCreateProtocolNotifyEvent() or not,
    // if it is, we will skip it until real event is triggered
    //
    Status = gBS->LocateProtocol (&gEfiDxeSmmReadyToLockProtocolGuid, NULL, (VOID **) &ProtocolPointer);
    if (EFI_SUCCESS != Status) {
      return;
    }
  
    DEBUG ((DEBUG_INFO, "Event gEfiDxeSmmReadyToLockProtocolGuid callback starts\n"));
  
    //
    // Dispatch the deferred 3rd party images.
    //
    EfiBootManagerDispatchDeferredImages ();
  
    //
    // For non-trusted console it must be handled here.
    //
    UpdateGraphicConOut (FALSE);
  }
  
  /**
    ReadyToBoot callback to set video and text mode for internal shell boot.
    That will not connect USB controller while CSM and FastBoot are disabled, we need to connect them
    before booting to Shell for showing USB devices in Shell.
  
    When FastBoot is enabled and Windows Console is the chosen Console behavior, input devices will not be connected
    by default. Hence, when booting to EFI shell, connecting input consoles are required.
  
    @param  Event   Pointer to this event
    @param  Context Event hanlder private data
  
    @retval None.
  **/
  VOID
  EFIAPI
  BdsReadyToBootCallback (
    IN  EFI_EVENT                 Event,
    IN  VOID                      *Context
    )
  {
    DEBUG ((DEBUG_INFO, "BdsReadyToBootCallback\n"));
  
    if (BootCurrentIsInternalShell ()) {
  
      ChangeModeForInternalShell ();
      EfiBootManagerConnectAllDefaultConsoles ();
      gDS->Dispatch ();
    }
  }
  
  
  /**
    Before console after trusted console event callback
  
    @param[in] Event      The Event this notify function registered to.
    @param[in] Context    Pointer to the context data registered to the Event.
  **/
  VOID
  BdsBeforeConsoleAfterTrustedConsoleCallback (
    IN EFI_EVENT          Event,
    IN VOID               *Context
    )
  {
    DEBUG ((DEBUG_INFO, "Event gBdsEventBeforeConsoleBeforeEndOfDxeGuid callback starts\n"));
  
    //
    // Connect Root Bridge to make PCI BAR resource allocated and all PciIo created
    //
    ConnectRootBridge (FALSE);
  }
  
  
  /**
    Before console before end of DXE event callback
  
    @param[in] Event      The Event this notify function registered to.
    @param[in] Context    Pointer to the context data registered to the Event.
  **/
  VOID
  BdsBeforeConsoleBeforeEndOfDxeGuidCallback (
    IN EFI_EVENT          Event,
    IN VOID               *Context
    )
  {
    DEBUG ((DEBUG_INFO, "Event gBdsBeforeConsoleBeforeEndOfDxeGuid callback starts\n"));
  
  }
  
  
  /**
    After console ready before boot option event callback
  
    @param[in] Event      The Event this notify function registered to.
    @param[in] Context    Pointer to the context data registered to the Event.
  **/
  VOID
  BdsAfterConsoleReadyBeforeBootOptionCallback (
    IN EFI_EVENT          Event,
    IN VOID               *Context
    )
  {
    EFI_BOOT_MODE                 LocalBootMode;
  
    DEBUG ((DEBUG_INFO, "Event gBdsAfterConsoleReadyBeforeBootOptionEvent callback starts\n"));
    //
    // Get current Boot Mode
    //
    LocalBootMode = gBootMode;
    DEBUG ((DEBUG_INFO, "Current local bootmode - %x\n", LocalBootMode));
  
    //
    // Go the different platform policy with different boot mode
    // Notes: this part code can be change with the table policy
    //
    switch (LocalBootMode) {
      case BOOT_ASSUMING_NO_CONFIGURATION_CHANGES:
      case BOOT_WITH_MINIMAL_CONFIGURATION:
      case BOOT_ON_S4_RESUME:
        //
        // Perform some platform specific connect sequence
        //
        PERF_START_EX(NULL,"EventRec", NULL, AsmReadTsc(), 0x7050);
        ConnectSequence (LocalBootMode);
        PERF_END_EX(NULL,"EventRec", NULL, AsmReadTsc(), 0x7051);
  
        break;
  
      case BOOT_WITH_FULL_CONFIGURATION:
      case BOOT_WITH_FULL_CONFIGURATION_PLUS_DIAGNOSTICS:
      case BOOT_WITH_DEFAULT_SETTINGS:
      default:
        //
        // Perform some platform specific connect sequence
        //
        ConnectSequence (LocalBootMode);
  
        //
        // Only in Full Configuration boot mode we do the enumeration of boot device
        //
        //
        // Dispatch all but Storage Oprom explicitly, because we assume Int13Thunk driver is there.
        //
  
        //
        // PXE boot option may appear after boot option enumeration
        //
        break;
    }
  
    Print (L"Press F7 for BootMenu!\n");
  
    EfiBootManagerRefreshAllBootOption ();
  
    if (IsNeedSortBootOption()) {
      EfiBootManagerSortLoadOptionVariable (LoadOptionTypeBoot, CompareBootOption);
    }
  }
  