/** @file
  Provide boot option support for Application "BootMaint"

  Include file system navigation, system handle selection

  Boot option manipulation

Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "BootMaint.h"
#include "BBSsupport.h"

/**
  Create a menu entry by given menu type.

  @param MenuType        The Menu type to be created.

  @retval NULL           If failed to create the menu.
  @return the new menu entry.

**/
BM_MENU_ENTRY *
BOpt_CreateMenuEntry (
  UINTN           MenuType
  )
{
  BM_MENU_ENTRY *MenuEntry;
  UINTN         ContextSize;

  //
  // Get context size according to menu type
  //
  switch (MenuType) {
  case BM_LOAD_CONTEXT_SELECT:
    ContextSize = sizeof (BM_LOAD_CONTEXT);
    break;

  case BM_FILE_CONTEXT_SELECT:
    ContextSize = sizeof (BM_FILE_CONTEXT);
    break;

  case BM_CONSOLE_CONTEXT_SELECT:
    ContextSize = sizeof (BM_CONSOLE_CONTEXT);
    break;

  case BM_TERMINAL_CONTEXT_SELECT:
    ContextSize = sizeof (BM_TERMINAL_CONTEXT);
    break;

  case BM_HANDLE_CONTEXT_SELECT:
    ContextSize = sizeof (BM_HANDLE_CONTEXT);
    break;

  case BM_LEGACY_DEV_CONTEXT_SELECT:
    ContextSize = sizeof (BM_LEGACY_DEVICE_CONTEXT);
    break;

  default:
    ContextSize = 0;
    break;
  }

  if (ContextSize == 0) {
    return NULL;
  }

  //
  // Create new menu entry
  //
  MenuEntry = AllocateZeroPool (sizeof (BM_MENU_ENTRY));
  if (MenuEntry == NULL) {
    return NULL;
  }

  MenuEntry->VariableContext = AllocateZeroPool (ContextSize);
  if (MenuEntry->VariableContext == NULL) {
    FreePool (MenuEntry);
    return NULL;
  }

  MenuEntry->Signature        = BM_MENU_ENTRY_SIGNATURE;
  MenuEntry->ContextSelection = MenuType;
  return MenuEntry;
}

/**
  Free up all resource allocated for a BM_MENU_ENTRY.

  @param MenuEntry   A pointer to BM_MENU_ENTRY.

**/
VOID
BOpt_DestroyMenuEntry (
  BM_MENU_ENTRY         *MenuEntry
  )
{
  BM_LOAD_CONTEXT           *LoadContext;
  BM_FILE_CONTEXT           *FileContext;
  BM_CONSOLE_CONTEXT        *ConsoleContext;
  BM_TERMINAL_CONTEXT       *TerminalContext;
  BM_HANDLE_CONTEXT         *HandleContext;
  BM_LEGACY_DEVICE_CONTEXT  *LegacyDevContext;

  //
  //  Select by the type in Menu entry for current context type
  //
  switch (MenuEntry->ContextSelection) {
  case BM_LOAD_CONTEXT_SELECT:
    LoadContext = (BM_LOAD_CONTEXT *) MenuEntry->VariableContext;
    FreePool (LoadContext->FilePathList);
    FreePool (LoadContext->LoadOption);
    if (LoadContext->OptionalData != NULL) {
      FreePool (LoadContext->OptionalData);
    }
    FreePool (LoadContext);
    break;

  case BM_FILE_CONTEXT_SELECT:
    FileContext = (BM_FILE_CONTEXT *) MenuEntry->VariableContext;

    if (!FileContext->IsRoot) {
      FreePool (FileContext->DevicePath);
    } else {
      if (FileContext->FHandle != NULL) {
        FileContext->FHandle->Close (FileContext->FHandle);
      }
    }

    if (FileContext->FileName != NULL) {
      FreePool (FileContext->FileName);
    }
    if (FileContext->Info != NULL) {
      FreePool (FileContext->Info);
    }
    FreePool (FileContext);
    break;

  case BM_CONSOLE_CONTEXT_SELECT:
    ConsoleContext = (BM_CONSOLE_CONTEXT *) MenuEntry->VariableContext;
    FreePool (ConsoleContext->DevicePath);
    FreePool (ConsoleContext);
    break;

  case BM_TERMINAL_CONTEXT_SELECT:
    TerminalContext = (BM_TERMINAL_CONTEXT *) MenuEntry->VariableContext;
    FreePool (TerminalContext->DevicePath);
    FreePool (TerminalContext);
    break;

  case BM_HANDLE_CONTEXT_SELECT:
    HandleContext = (BM_HANDLE_CONTEXT *) MenuEntry->VariableContext;
    FreePool (HandleContext);
    break;

  case BM_LEGACY_DEV_CONTEXT_SELECT:
    LegacyDevContext = (BM_LEGACY_DEVICE_CONTEXT *) MenuEntry->VariableContext;
    FreePool (LegacyDevContext);

  default:
    break;
  }

  FreePool (MenuEntry->DisplayString);
  if (MenuEntry->HelpString != NULL) {
    FreePool (MenuEntry->HelpString);
  }

  FreePool (MenuEntry);
}

/**
  Get the Menu Entry from the list in Menu Entry List.

  If MenuNumber is great or equal to the number of Menu
  Entry in the list, then ASSERT.

  @param MenuOption      The Menu Entry List to read the menu entry.
  @param MenuNumber      The index of Menu Entry.

  @return The Menu Entry.

**/
BM_MENU_ENTRY *
BOpt_GetMenuEntry (
  BM_MENU_OPTION      *MenuOption,
  UINTN               MenuNumber
  )
{
  BM_MENU_ENTRY   *NewMenuEntry;
  UINTN           Index;
  LIST_ENTRY      *List;

  ASSERT (MenuNumber < MenuOption->MenuNumber);

  List = MenuOption->Head.ForwardLink;
  for (Index = 0; Index < MenuNumber; Index++) {
    List = List->ForwardLink;
  }

  NewMenuEntry = CR (List, BM_MENU_ENTRY, Link, BM_MENU_ENTRY_SIGNATURE);

  return NewMenuEntry;
}

/**
  This function build the FsOptionMenu list which records all
  available file system in the system. They includes all instances
  of EFI_SIMPLE_FILE_SYSTEM_PROTOCOL, all instances of EFI_LOAD_FILE_SYSTEM
  and all type of legacy boot device.

  @param CallbackData    BMM context data

  @retval  EFI_SUCCESS             Success find the file system
  @retval  EFI_OUT_OF_RESOURCES    Can not create menu entry

**/
EFI_STATUS
BOpt_FindFileSystem (
  IN BMM_CALLBACK_DATA          *CallbackData
  )
{
  UINTN                     NoBlkIoHandles;
  UINTN                     NoSimpleFsHandles;
  UINTN                     NoLoadFileHandles;
  EFI_HANDLE                *BlkIoHandle;
  EFI_HANDLE                *SimpleFsHandle;
  EFI_HANDLE                *LoadFileHandle;
  UINT16                    *VolumeLabel;
  EFI_BLOCK_IO_PROTOCOL     *BlkIo;
  UINTN                     Index;
  EFI_STATUS                Status;
  BM_MENU_ENTRY             *MenuEntry;
  BM_FILE_CONTEXT           *FileContext;
  UINT16                    *TempStr;
  UINTN                     OptionNumber;
  VOID                      *Buffer;
  EFI_LEGACY_BIOS_PROTOCOL  *LegacyBios;
  UINT16                    DeviceType;
  BBS_BBS_DEVICE_PATH       BbsDevicePathNode;
  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
  BOOLEAN                   RemovableMedia;


  NoSimpleFsHandles = 0;
  NoLoadFileHandles = 0;
  OptionNumber      = 0;
  InitializeListHead (&FsOptionMenu.Head);

  //
  // Locate Handles that support BlockIo protocol
  //
  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiBlockIoProtocolGuid,
                  NULL,
                  &NoBlkIoHandles,
                  &BlkIoHandle
                  );
  if (!EFI_ERROR (Status)) {

    for (Index = 0; Index < NoBlkIoHandles; Index++) {
      Status = gBS->HandleProtocol (
                      BlkIoHandle[Index],
                      &gEfiBlockIoProtocolGuid,
                      (VOID **) &BlkIo
                      );

      if (EFI_ERROR (Status)) {
        continue;
      }

      //
      // Issue a dummy read to trigger reinstall of BlockIo protocol for removable media
      //
      if (BlkIo->Media->RemovableMedia) {
        Buffer = AllocateZeroPool (BlkIo->Media->BlockSize);
        if (NULL == Buffer) {
          FreePool (BlkIoHandle);
          return EFI_OUT_OF_RESOURCES;
        }

        BlkIo->ReadBlocks (
                BlkIo,
                BlkIo->Media->MediaId,
                0,
                BlkIo->Media->BlockSize,
                Buffer
                );
        FreePool (Buffer);
      }
    }
    FreePool (BlkIoHandle);
  }

  //
  // Locate Handles that support Simple File System protocol
  //
  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiSimpleFileSystemProtocolGuid,
                  NULL,
                  &NoSimpleFsHandles,
                  &SimpleFsHandle
                  );
  if (!EFI_ERROR (Status)) {
    //
    // Find all the instances of the File System prototocol
    //
    for (Index = 0; Index < NoSimpleFsHandles; Index++) {
      Status = gBS->HandleProtocol (
                      SimpleFsHandle[Index],
                      &gEfiBlockIoProtocolGuid,
                      (VOID **) &BlkIo
                      );
      if (EFI_ERROR (Status)) {
        //
        // If no block IO exists assume it's NOT a removable media
        //
        RemovableMedia = FALSE;
      } else {
        //
        // If block IO exists check to see if it's remobable media
        //
        RemovableMedia = BlkIo->Media->RemovableMedia;
      }

      //
      // Allocate pool for this load option
      //
      MenuEntry = BOpt_CreateMenuEntry (BM_FILE_CONTEXT_SELECT);
      if (NULL == MenuEntry) {
        FreePool (SimpleFsHandle);
        return EFI_OUT_OF_RESOURCES;
      }

      FileContext = (BM_FILE_CONTEXT *) MenuEntry->VariableContext;

      FileContext->Handle     = SimpleFsHandle[Index];
      MenuEntry->OptionNumber = Index;
      FileContext->FHandle    = EfiLibOpenRoot (FileContext->Handle);
      if (FileContext->FHandle == NULL) {
        BOpt_DestroyMenuEntry (MenuEntry);
        continue;
      }

      MenuEntry->HelpString = DevicePathToStr (DevicePathFromHandle (FileContext->Handle));
      FileContext->Info = EfiLibFileSystemVolumeLabelInfo (FileContext->FHandle);
      FileContext->FileName = EfiStrDuplicate (L"\\");
      FileContext->DevicePath = FileDevicePath (
                                  FileContext->Handle,
                                  FileContext->FileName
                                  );
      FileContext->IsDir            = TRUE;
      FileContext->IsRoot           = TRUE;
      FileContext->IsRemovableMedia = RemovableMedia;
      FileContext->IsLoadFile       = FALSE;

      //
      // Get current file system's Volume Label
      //
      if (FileContext->Info == NULL) {
        VolumeLabel = L"NO FILE SYSTEM INFO";
      } else {
        VolumeLabel = FileContext->Info->VolumeLabel;
        if (*VolumeLabel == 0x0000) {
          VolumeLabel = L"NO VOLUME LABEL";
        }
      }

      TempStr                   = MenuEntry->HelpString;
      MenuEntry->DisplayString  = AllocateZeroPool (MAX_CHAR);
      ASSERT (MenuEntry->DisplayString != NULL);
      UnicodeSPrint (
        MenuEntry->DisplayString,
        MAX_CHAR,
        L"%s, [%s]",
        VolumeLabel,
        TempStr
        );
      OptionNumber++;
      InsertTailList (&FsOptionMenu.Head, &MenuEntry->Link);
    }
  }

  if (NoSimpleFsHandles != 0) {
    FreePool (SimpleFsHandle);
  }
  //
  // Searching for handles that support Load File protocol
  //
  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiLoadFileProtocolGuid,
                  NULL,
                  &NoLoadFileHandles,
                  &LoadFileHandle
                  );

  if (!EFI_ERROR (Status)) {
    for (Index = 0; Index < NoLoadFileHandles; Index++) {
      MenuEntry = BOpt_CreateMenuEntry (BM_FILE_CONTEXT_SELECT);
      if (NULL == MenuEntry) {
        FreePool (LoadFileHandle);
        return EFI_OUT_OF_RESOURCES;
      }

      FileContext                   = (BM_FILE_CONTEXT *) MenuEntry->VariableContext;
      FileContext->IsRemovableMedia = FALSE;
      FileContext->IsLoadFile       = TRUE;
      FileContext->Handle           = LoadFileHandle[Index];
      FileContext->IsRoot           = TRUE;

      FileContext->DevicePath       = DevicePathFromHandle (FileContext->Handle);
      FileContext->FileName         = DevicePathToStr (FileContext->DevicePath);

      MenuEntry->HelpString     = DevicePathToStr (FileContext->DevicePath);

      TempStr                   = MenuEntry->HelpString;
      MenuEntry->DisplayString  = AllocateZeroPool (MAX_CHAR);
      ASSERT (MenuEntry->DisplayString != NULL);
      UnicodeSPrint (
        MenuEntry->DisplayString,
        MAX_CHAR,
        L"Load File [%s]",
        TempStr
        );

      MenuEntry->OptionNumber = OptionNumber;
      OptionNumber++;
      InsertTailList (&FsOptionMenu.Head, &MenuEntry->Link);
    }
  }

  if (NoLoadFileHandles != 0) {
    FreePool (LoadFileHandle);
  }

  //
  // Add Legacy Boot Option Support Here
  //
  Status = gBS->LocateProtocol (
                  &gEfiLegacyBiosProtocolGuid,
                  NULL,
                  (VOID **) &LegacyBios
                  );
  if (!EFI_ERROR (Status)) {

    for (Index = BBS_TYPE_FLOPPY; Index <= BBS_TYPE_EMBEDDED_NETWORK; Index++) {
      MenuEntry = BOpt_CreateMenuEntry (BM_FILE_CONTEXT_SELECT);
      if (NULL == MenuEntry) {
        return EFI_OUT_OF_RESOURCES;
      }

      FileContext                       = (BM_FILE_CONTEXT *) MenuEntry->VariableContext;

      FileContext->IsRemovableMedia     = FALSE;
      FileContext->IsLoadFile           = TRUE;
      FileContext->IsBootLegacy         = TRUE;
      DeviceType                        = (UINT16) Index;
      BbsDevicePathNode.Header.Type     = BBS_DEVICE_PATH;
      BbsDevicePathNode.Header.SubType  = BBS_BBS_DP;
      SetDevicePathNodeLength (
        &BbsDevicePathNode.Header,
        sizeof (BBS_BBS_DEVICE_PATH)
        );
      BbsDevicePathNode.DeviceType  = DeviceType;
      BbsDevicePathNode.StatusFlag  = 0;
      BbsDevicePathNode.String[0]   = 0;
      DevicePath = AppendDevicePathNode (
                    EndDevicePath,
                    (EFI_DEVICE_PATH_PROTOCOL *) &BbsDevicePathNode
                    );

      FileContext->DevicePath   = DevicePath;
      MenuEntry->HelpString     = DevicePathToStr (FileContext->DevicePath);

      TempStr                   = MenuEntry->HelpString;
      MenuEntry->DisplayString  = AllocateZeroPool (MAX_CHAR);
      ASSERT (MenuEntry->DisplayString != NULL);
      UnicodeSPrint (
        MenuEntry->DisplayString,
        MAX_CHAR,
        L"Boot Legacy [%s]",
        TempStr
        );
      MenuEntry->OptionNumber = OptionNumber;
      OptionNumber++;
      InsertTailList (&FsOptionMenu.Head, &MenuEntry->Link);
    }
  }
  //
  // Remember how many file system options are here
  //
  FsOptionMenu.MenuNumber = OptionNumber;
  return EFI_SUCCESS;
}

/**
  Free resources allocated in Allocate Rountine.

  @param FreeMenu        Menu to be freed
**/
VOID
BOpt_FreeMenu (
  BM_MENU_OPTION        *FreeMenu
  )
{
  BM_MENU_ENTRY *MenuEntry;
  while (!IsListEmpty (&FreeMenu->Head)) {
    MenuEntry = CR (
                  FreeMenu->Head.ForwardLink,
                  BM_MENU_ENTRY,
                  Link,
                  BM_MENU_ENTRY_SIGNATURE
                  );
    RemoveEntryList (&MenuEntry->Link);
    BOpt_DestroyMenuEntry (MenuEntry);
  }
  FreeMenu->MenuNumber = 0;
}

/**
  Find files under current directory
  All files and sub-directories in current directory
  will be stored in DirectoryMenu for future use.

  @param CallbackData  The BMM context data.
  @param MenuEntry     The Menu Entry.

  @retval EFI_SUCCESS         Get files from current dir successfully.
  @return Other value if can't get files from current dir.

**/
EFI_STATUS
BOpt_FindFiles (
  IN BMM_CALLBACK_DATA          *CallbackData,
  IN BM_MENU_ENTRY              *MenuEntry
  )
{
  EFI_FILE_HANDLE NewDir;
  EFI_FILE_HANDLE Dir;
  EFI_FILE_INFO   *DirInfo;
  UINTN           BufferSize;
  UINTN           DirBufferSize;
  BM_MENU_ENTRY   *NewMenuEntry;
  BM_FILE_CONTEXT *FileContext;
  BM_FILE_CONTEXT *NewFileContext;
  UINTN           Pass;
  EFI_STATUS      Status;
  UINTN           OptionNumber;

  FileContext   = (BM_FILE_CONTEXT *) MenuEntry->VariableContext;
  Dir           = FileContext->FHandle;
  OptionNumber  = 0;
  //
  // Open current directory to get files from it
  //
  Status = Dir->Open (
                  Dir,
                  &NewDir,
                  FileContext->FileName,
                  EFI_FILE_READ_ONLY,
                  0
                  );
  if (!FileContext->IsRoot) {
    Dir->Close (Dir);
  }

  if (EFI_ERROR (Status)) {
    return Status;
  }

  DirInfo = EfiLibFileInfo (NewDir);
  if (DirInfo == NULL) {
    return EFI_NOT_FOUND;
  }

  if ((DirInfo->Attribute & EFI_FILE_DIRECTORY) == 0) {
    return EFI_INVALID_PARAMETER;
  }

  FileContext->DevicePath = FileDevicePath (
                              FileContext->Handle,
                              FileContext->FileName
                              );

  DirBufferSize = sizeof (EFI_FILE_INFO) + 1024;
  DirInfo       = AllocateZeroPool (DirBufferSize);
  if (DirInfo == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }
  //
  // Get all files in current directory
  // Pass 1 to get Directories
  // Pass 2 to get files that are EFI images
  //
  for (Pass = 1; Pass <= 2; Pass++) {
    NewDir->SetPosition (NewDir, 0);
    for (;;) {
      BufferSize  = DirBufferSize;
      Status      = NewDir->Read (NewDir, &BufferSize, DirInfo);
      if (EFI_ERROR (Status) || BufferSize == 0) {
        break;
      }

      if (((DirInfo->Attribute & EFI_FILE_DIRECTORY) != 0 && Pass == 2) ||
          ((DirInfo->Attribute & EFI_FILE_DIRECTORY) == 0 && Pass == 1)
          ) {
        //
        // Pass 1 is for Directories
        // Pass 2 is for file names
        //
        continue;
      }

      if (!(BOpt_IsEfiImageName (DirInfo->FileName) || (DirInfo->Attribute & EFI_FILE_DIRECTORY) != 0)) {
        //
        // Slip file unless it is a directory entry or a .EFI file
        //
        continue;
      }

      NewMenuEntry = BOpt_CreateMenuEntry (BM_FILE_CONTEXT_SELECT);
      if (NULL == NewMenuEntry) {
        return EFI_OUT_OF_RESOURCES;
      }

      NewFileContext          = (BM_FILE_CONTEXT *) NewMenuEntry->VariableContext;
      NewFileContext->Handle  = FileContext->Handle;
      NewFileContext->FileName = BOpt_AppendFileName (
                                  FileContext->FileName,
                                  DirInfo->FileName
                                  );
      NewFileContext->FHandle = NewDir;
      NewFileContext->DevicePath = FileDevicePath (
                                    NewFileContext->Handle,
                                    NewFileContext->FileName
                                    );
      NewMenuEntry->HelpString = NULL;

      MenuEntry->DisplayStringToken = GetStringTokenFromDepository (
                                        CallbackData,
                                        FileOptionStrDepository
                                        );

      NewFileContext->IsDir = (BOOLEAN) ((DirInfo->Attribute & EFI_FILE_DIRECTORY) == EFI_FILE_DIRECTORY);

      if (NewFileContext->IsDir) {
        BufferSize                  = StrLen (DirInfo->FileName) * 2 + 6;
        NewMenuEntry->DisplayString = AllocateZeroPool (BufferSize);

        UnicodeSPrint (
          NewMenuEntry->DisplayString,
          BufferSize,
          L"<%s>",
          DirInfo->FileName
          );

      } else {
        NewMenuEntry->DisplayString = EfiStrDuplicate (DirInfo->FileName);
      }

      NewFileContext->IsRoot            = FALSE;
      NewFileContext->IsLoadFile        = FALSE;
      NewFileContext->IsRemovableMedia  = FALSE;

      NewMenuEntry->OptionNumber        = OptionNumber;
      OptionNumber++;
      InsertTailList (&DirectoryMenu.Head, &NewMenuEntry->Link);
    }
  }

  DirectoryMenu.MenuNumber = OptionNumber;
  FreePool (DirInfo);
  return EFI_SUCCESS;
}

/**
  Build the LegacyFDMenu LegacyHDMenu LegacyCDMenu according to LegacyBios.GetBbsInfo().

  @retval EFI_SUCCESS The function complete successfully.
  @retval EFI_OUT_OF_RESOURCES No enough memory to complete this function.

**/
EFI_STATUS
BOpt_GetLegacyOptions (
  VOID
  )
{
  BM_MENU_ENTRY             *NewMenuEntry;
  BM_LEGACY_DEVICE_CONTEXT  *NewLegacyDevContext;
  EFI_STATUS                Status;
  EFI_LEGACY_BIOS_PROTOCOL  *LegacyBios;
  UINT16                    HddCount;
  HDD_INFO                  *HddInfo;
  UINT16                    BbsCount;
  BBS_TABLE                 *BbsTable;
  UINT16                    Index;
  CHAR16                    DescString[100];
  UINTN                     FDNum;
  UINTN                     HDNum;
  UINTN                     CDNum;
  UINTN                     NETNum;
  UINTN                     BEVNum;

  NewMenuEntry  = NULL;
  HddInfo       = NULL;
  BbsTable      = NULL;
  BbsCount      = 0;

  //
  // Initialize Bbs Table Context from BBS info data
  //
  InitializeListHead (&LegacyFDMenu.Head);
  InitializeListHead (&LegacyHDMenu.Head);
  InitializeListHead (&LegacyCDMenu.Head);
  InitializeListHead (&LegacyNETMenu.Head);
  InitializeListHead (&LegacyBEVMenu.Head);

  Status = gBS->LocateProtocol (
                  &gEfiLegacyBiosProtocolGuid,
                  NULL,
                  (VOID **) &LegacyBios
                  );
  if (!EFI_ERROR (Status)) {
    Status = LegacyBios->GetBbsInfo (
                          LegacyBios,
                          &HddCount,
                          &HddInfo,
                          &BbsCount,
                          &BbsTable
                          );
    if (EFI_ERROR (Status)) {
      return Status;
    }
  }

  FDNum   = 0;
  HDNum   = 0;
  CDNum   = 0;
  NETNum  = 0;
  BEVNum  = 0;

  for (Index = 0; Index < BbsCount; Index++) {
    if ((BBS_IGNORE_ENTRY == BbsTable[Index].BootPriority) ||
        (BBS_DO_NOT_BOOT_FROM == BbsTable[Index].BootPriority)
        ) {
      continue;
    }

    NewMenuEntry = BOpt_CreateMenuEntry (BM_LEGACY_DEV_CONTEXT_SELECT);
    if (NULL == NewMenuEntry) {
      break;
    }

    NewLegacyDevContext           = (BM_LEGACY_DEVICE_CONTEXT *) NewMenuEntry->VariableContext;
    NewLegacyDevContext->BbsEntry = &BbsTable[Index];
    NewLegacyDevContext->BbsIndex = Index;
    NewLegacyDevContext->BbsCount = BbsCount;
    BdsBuildLegacyDevNameString (
      &BbsTable[Index],
      Index,
      sizeof (DescString),
      DescString
      );
    NewLegacyDevContext->Description = AllocateCopyPool (StrSize (DescString), DescString);
    if (NULL == NewLegacyDevContext->Description) {
      break;
    }

    NewMenuEntry->DisplayString = NewLegacyDevContext->Description;
    NewMenuEntry->HelpString    = NULL;

    switch (BbsTable[Index].DeviceType) {
    case BBS_FLOPPY:
      InsertTailList (&LegacyFDMenu.Head, &NewMenuEntry->Link);
      FDNum++;
      break;

    case BBS_HARDDISK:
      InsertTailList (&LegacyHDMenu.Head, &NewMenuEntry->Link);
      HDNum++;
      break;

    case BBS_CDROM:
      InsertTailList (&LegacyCDMenu.Head, &NewMenuEntry->Link);
      CDNum++;
      break;

    case BBS_EMBED_NETWORK:
      InsertTailList (&LegacyNETMenu.Head, &NewMenuEntry->Link);
      NETNum++;
      break;

    case BBS_BEV_DEVICE:
      InsertTailList (&LegacyBEVMenu.Head, &NewMenuEntry->Link);
      BEVNum++;
      break;
    }
  }

  if (Index != BbsCount) {
    BOpt_FreeLegacyOptions ();
    return EFI_OUT_OF_RESOURCES;
  }

  LegacyFDMenu.MenuNumber   = FDNum;
  LegacyHDMenu.MenuNumber   = HDNum;
  LegacyCDMenu.MenuNumber   = CDNum;
  LegacyNETMenu.MenuNumber  = NETNum;
  LegacyBEVMenu.MenuNumber  = BEVNum;
  return EFI_SUCCESS;
}

/**
  Free out resouce allocated from Legacy Boot Options.

**/
VOID
BOpt_FreeLegacyOptions (
  VOID
  )
{
  BOpt_FreeMenu (&LegacyFDMenu);
  BOpt_FreeMenu (&LegacyHDMenu);
  BOpt_FreeMenu (&LegacyCDMenu);
  BOpt_FreeMenu (&LegacyNETMenu);
  BOpt_FreeMenu (&LegacyBEVMenu);
}

/**

  Build the BootOptionMenu according to BootOrder Variable.
  This Routine will access the Boot#### to get EFI_LOAD_OPTION.

  @param CallbackData The BMM context data.

  @return EFI_NOT_FOUND Fail to find "BootOrder" variable.
  @return EFI_SUCESS    Success build boot option menu.

**/
EFI_STATUS
BOpt_GetBootOptions (
  IN  BMM_CALLBACK_DATA         *CallbackData
  )
{
  UINTN                     Index;
  UINT16                    BootString[10];
  UINT8                     *LoadOptionFromVar;
  UINT8                     *LoadOption;
  UINTN                     BootOptionSize;
  BOOLEAN                   BootNextFlag;
  UINT16                    *BootOrderList;
  UINTN                     BootOrderListSize;
  UINT16                    *BootNext;
  UINTN                     BootNextSize;
  BM_MENU_ENTRY             *NewMenuEntry;
  BM_LOAD_CONTEXT           *NewLoadContext;
  UINT8                     *LoadOptionPtr;
  UINTN                     StringSize;
  UINTN                     OptionalDataSize;
  UINT8                     *LoadOptionEnd;
  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
  UINTN                     MenuCount;
  UINT8                     *Ptr;

  MenuCount         = 0;
  BootOrderListSize = 0;
  BootNextSize      = 0;
  BootOrderList     = NULL;
  BootNext          = NULL;
  LoadOptionFromVar = NULL;
  BOpt_FreeMenu (&BootOptionMenu);
  InitializeListHead (&BootOptionMenu.Head);

  //
  // Get the BootOrder from the Var
  //
  BootOrderList = BdsLibGetVariableAndSize (
                    L"BootOrder",
                    &gEfiGlobalVariableGuid,
                    &BootOrderListSize
                    );
  if (BootOrderList == NULL) {
    return EFI_NOT_FOUND;
  }

  //
  // Get the BootNext from the Var
  //
  BootNext = BdsLibGetVariableAndSize (
              L"BootNext",
              &gEfiGlobalVariableGuid,
              &BootNextSize
              );

  if (BootNext != NULL) {
    if (BootNextSize != sizeof (UINT16)) {
      FreePool (BootNext);
      BootNext = NULL;
    }
  }

  for (Index = 0; Index < BootOrderListSize / sizeof (UINT16); Index++) {
    UnicodeSPrint (BootString, sizeof (BootString), L"Boot%04x", BootOrderList[Index]);
    //
    //  Get all loadoptions from the VAR
    //
    LoadOptionFromVar = BdsLibGetVariableAndSize (
                          BootString,
                          &gEfiGlobalVariableGuid,
                          &BootOptionSize
                          );
    if (LoadOptionFromVar == NULL) {
      continue;
    }

    LoadOption = AllocateZeroPool (BootOptionSize);
    if (LoadOption == NULL) {
      continue;
    }

    CopyMem (LoadOption, LoadOptionFromVar, BootOptionSize);
    FreePool (LoadOptionFromVar);

    if (BootNext != NULL) {
      BootNextFlag = (BOOLEAN) (*BootNext == BootOrderList[Index]);
    } else {
      BootNextFlag = FALSE;
    }

    if (0 == (*((UINT32 *) LoadOption) & LOAD_OPTION_ACTIVE)) {
      FreePool (LoadOption);
      continue;
    }
    //
    // BUGBUG: could not return EFI_OUT_OF_RESOURCES here directly.
    // the buffer allocated already should be freed before returning.
    //
    NewMenuEntry = BOpt_CreateMenuEntry (BM_LOAD_CONTEXT_SELECT);
    if (NULL == NewMenuEntry) {
      return EFI_OUT_OF_RESOURCES;
    }

    NewLoadContext                      = (BM_LOAD_CONTEXT *) NewMenuEntry->VariableContext;

    LoadOptionPtr                       = LoadOption;
    LoadOptionEnd                       = LoadOption + BootOptionSize;

    NewMenuEntry->OptionNumber          = BootOrderList[Index];
    NewLoadContext->LoadOptionModified  = FALSE;
    NewLoadContext->Deleted             = FALSE;
    NewLoadContext->IsBootNext          = BootNextFlag;

    //
    // Is a Legacy Device?
    //
    Ptr = (UINT8 *) LoadOption;

    //
    // Attribute = *(UINT32 *)Ptr;
    //
    Ptr += sizeof (UINT32);

    //
    // FilePathSize = *(UINT16 *)Ptr;
    //
    Ptr += sizeof (UINT16);

    //
    // Description = (CHAR16 *)Ptr;
    //
    Ptr += StrSize ((CHAR16 *) Ptr);

    //
    // Now Ptr point to Device Path
    //
    DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) Ptr;
    if ((BBS_DEVICE_PATH == DevicePath->Type) && (BBS_BBS_DP == DevicePath->SubType)) {
      NewLoadContext->IsLegacy = TRUE;
    } else {
      NewLoadContext->IsLegacy = FALSE;
    }
    //
    // LoadOption is a pointer type of UINT8
    // for easy use with following LOAD_OPTION
    // embedded in this struct
    //
    NewLoadContext->LoadOption      = LoadOption;
    NewLoadContext->LoadOptionSize  = BootOptionSize;

    NewLoadContext->Attributes      = *(UINT32 *) LoadOptionPtr;
    NewLoadContext->IsActive        = (BOOLEAN) (NewLoadContext->Attributes & LOAD_OPTION_ACTIVE);

    NewLoadContext->ForceReconnect  = (BOOLEAN) (NewLoadContext->Attributes & LOAD_OPTION_FORCE_RECONNECT);

    LoadOptionPtr += sizeof (UINT32);

    NewLoadContext->FilePathListLength = *(UINT16 *) LoadOptionPtr;
    LoadOptionPtr += sizeof (UINT16);

    StringSize = StrSize((UINT16*)LoadOptionPtr);

    NewLoadContext->Description = AllocateCopyPool (StrSize((UINT16*)LoadOptionPtr), LoadOptionPtr);
    ASSERT (NewLoadContext->Description != NULL);

    NewMenuEntry->DisplayString = NewLoadContext->Description;

    LoadOptionPtr += StringSize;

    NewLoadContext->FilePathList = AllocateZeroPool (NewLoadContext->FilePathListLength);
    ASSERT (NewLoadContext->FilePathList != NULL);
    CopyMem (
      NewLoadContext->FilePathList,
      (EFI_DEVICE_PATH_PROTOCOL *) LoadOptionPtr,
      NewLoadContext->FilePathListLength
      );

    NewMenuEntry->HelpString = DevicePathToStr (NewLoadContext->FilePathList);
    NewMenuEntry->DisplayStringToken = GetStringTokenFromDepository (
                                        CallbackData,
                                        BootOptionStrDepository
                                        );
    NewMenuEntry->HelpStringToken = GetStringTokenFromDepository (
                                      CallbackData,
                                      BootOptionHelpStrDepository
                                      );
    LoadOptionPtr += NewLoadContext->FilePathListLength;

    if (LoadOptionPtr < LoadOptionEnd) {
      OptionalDataSize = BootOptionSize -
        sizeof (UINT32) -
        sizeof (UINT16) -
        StringSize -
        NewLoadContext->FilePathListLength;

      NewLoadContext->OptionalData = AllocateZeroPool (OptionalDataSize);
      ASSERT (NewLoadContext->OptionalData != NULL);
      CopyMem (
        NewLoadContext->OptionalData,
        LoadOptionPtr,
        OptionalDataSize
        );

      NewLoadContext->OptionalDataSize = OptionalDataSize;
    }

    InsertTailList (&BootOptionMenu.Head, &NewMenuEntry->Link);
    MenuCount++;
  }

  if (BootNext != NULL) {
    FreePool (BootNext);
  }
  if (BootOrderList != NULL) {
    FreePool (BootOrderList);
  }
  BootOptionMenu.MenuNumber = MenuCount;
  return EFI_SUCCESS;
}

/**

  Append file name to existing file name.

  @param Str1  The existing file name
  @param Str2  The file name to be appended

  @return Allocate a new string to hold the appended result.
          Caller is responsible to free the returned string.

**/
CHAR16 *
BOpt_AppendFileName (
  IN  CHAR16  *Str1,
  IN  CHAR16  *Str2
  )
{
  UINTN   Size1;
  UINTN   Size2;
  UINTN   MaxLen;
  CHAR16  *Str;
  CHAR16  *TmpStr;
  CHAR16  *Ptr;
  CHAR16  *LastSlash;

  Size1 = StrSize (Str1);
  Size2 = StrSize (Str2);
  MaxLen = (Size1 + Size2 + sizeof (CHAR16)) / sizeof (CHAR16);
  Str   = AllocateZeroPool (MaxLen * sizeof (CHAR16));
  ASSERT (Str != NULL);

  TmpStr = AllocateZeroPool (MaxLen * sizeof (CHAR16));
  ASSERT (TmpStr != NULL);

  StrCatS (Str, MaxLen, Str1);
  if (!((*Str == '\\') && (*(Str + 1) == 0))) {
    StrCatS (Str, MaxLen, L"\\");
  }

  StrCatS (Str, MaxLen, Str2);

  Ptr       = Str;
  LastSlash = Str;
  while (*Ptr != 0) {
    if (*Ptr == '\\' && *(Ptr + 1) == '.' && *(Ptr + 2) == '.' && *(Ptr + 3) == L'\\') {
      //
      // Convert "\Name\..\" to "\"
      // DO NOT convert the .. if it is at the end of the string. This will
      // break the .. behavior in changing directories.
      //

      //
      // Use TmpStr as a backup, as StrCpyS in BaseLib does not handle copy of two strings
      // that overlap.
      //
      StrCpyS (TmpStr, MaxLen, Ptr + 3);
      StrCpyS (LastSlash, MaxLen - ((UINTN) LastSlash - (UINTN) Str) / sizeof (CHAR16), TmpStr);
      Ptr = LastSlash;
    } else if (*Ptr == '\\' && *(Ptr + 1) == '.' && *(Ptr + 2) == '\\') {
      //
      // Convert a "\.\" to a "\"
      //

      //
      // Use TmpStr as a backup, as StrCpyS in BaseLib does not handle copy of two strings
      // that overlap.
      //
      StrCpyS (TmpStr, MaxLen, Ptr + 2);
      StrCpyS (Ptr, MaxLen - ((UINTN) Ptr - (UINTN) Str) / sizeof (CHAR16), TmpStr);
      Ptr = LastSlash;
    } else if (*Ptr == '\\') {
      LastSlash = Ptr;
    }

    Ptr++;
  }

  FreePool (TmpStr);

  return Str;
}

/**

  Check whether current FileName point to a valid
  Efi Image File.

  @param FileName  File need to be checked.

  @retval TRUE  Is Efi Image
  @retval FALSE Not a valid Efi Image

**/
BOOLEAN
BOpt_IsEfiImageName (
  IN UINT16  *FileName
  )
{
  //
  // Search for ".efi" extension
  //
  while (*FileName != L'\0') {
    if (FileName[0] == '.') {
      if (FileName[1] == 'e' || FileName[1] == 'E') {
        if (FileName[2] == 'f' || FileName[2] == 'F') {
          if (FileName[3] == 'i' || FileName[3] == 'I') {
            return TRUE;
          } else if (FileName[3] == 0x0000) {
            return FALSE;
          }
        } else if (FileName[2] == 0x0000) {
          return FALSE;
        }
      } else if (FileName[1] == 0x0000) {
        return FALSE;
      }
    }

    FileName += 1;
  }

  return FALSE;
}



/**

  Find drivers that will be added as Driver#### variables from handles
  in current system environment
  All valid handles in the system except those consume SimpleFs, LoadFile
  are stored in DriverMenu for future use.

  @retval EFI_SUCCESS The function complets successfully.
  @return Other value if failed to build the DriverMenu.

**/
EFI_STATUS
BOpt_FindDrivers (
  VOID
  )
{
  UINTN                           NoDevicePathHandles;
  EFI_HANDLE                      *DevicePathHandle;
  UINTN                           Index;
  EFI_STATUS                      Status;
  BM_MENU_ENTRY                   *NewMenuEntry;
  BM_HANDLE_CONTEXT               *NewHandleContext;
  EFI_HANDLE                      CurHandle;
  UINTN                           OptionNumber;
  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFs;
  EFI_LOAD_FILE_PROTOCOL          *LoadFile;

  SimpleFs  = NULL;
  LoadFile  = NULL;

  InitializeListHead (&DriverMenu.Head);

  //
  // At first, get all handles that support Device Path
  // protocol which is the basic requirement for
  // Driver####
  //
  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiDevicePathProtocolGuid,
                  NULL,
                  &NoDevicePathHandles,
                  &DevicePathHandle
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  OptionNumber = 0;
  for (Index = 0; Index < NoDevicePathHandles; Index++) {
    CurHandle = DevicePathHandle[Index];

    Status = gBS->HandleProtocol (
                    CurHandle,
                    &gEfiSimpleFileSystemProtocolGuid,
                    (VOID **) &SimpleFs
                    );
    if (Status == EFI_SUCCESS) {
      continue;
    }

    Status = gBS->HandleProtocol (
                    CurHandle,
                    &gEfiLoadFileProtocolGuid,
                    (VOID **) &LoadFile
                    );
    if (Status == EFI_SUCCESS) {
      continue;
    }

    NewMenuEntry = BOpt_CreateMenuEntry (BM_HANDLE_CONTEXT_SELECT);
    if (NULL == NewMenuEntry) {
      FreePool (DevicePathHandle);
      return EFI_OUT_OF_RESOURCES;
    }

    NewHandleContext              = (BM_HANDLE_CONTEXT *) NewMenuEntry->VariableContext;
    NewHandleContext->Handle      = CurHandle;
    NewHandleContext->DevicePath  = DevicePathFromHandle (CurHandle);
    NewMenuEntry->DisplayString = DevicePathToStr (NewHandleContext->DevicePath);
    NewMenuEntry->HelpString    = NULL;
    NewMenuEntry->OptionNumber  = OptionNumber;
    OptionNumber++;
    InsertTailList (&DriverMenu.Head, &NewMenuEntry->Link);

  }

  if (DevicePathHandle != NULL) {
    FreePool (DevicePathHandle);
  }

  DriverMenu.MenuNumber = OptionNumber;
  return EFI_SUCCESS;
}

/**

  Get the Option Number that has not been allocated for use.

  @param Type  The type of Option.

  @return The available Option Number.

**/
UINT16
BOpt_GetOptionNumber (
  CHAR16        *Type
  )
{
  UINT16        *OrderList;
  UINTN         OrderListSize;
  UINTN         Index;
  CHAR16        StrTemp[20];
  UINT16        *OptionBuffer;
  UINT16        OptionNumber;
  UINTN         OptionSize;

  OrderListSize = 0;
  OrderList     = NULL;
  OptionNumber  = 0;
  Index         = 0;

  UnicodeSPrint (StrTemp, sizeof (StrTemp), L"%sOrder", Type);

  OrderList = BdsLibGetVariableAndSize (
                          StrTemp,
                          &gEfiGlobalVariableGuid,
                          &OrderListSize
                          );

  for (OptionNumber = 0; ; OptionNumber++) {
    if (OrderList != NULL) {
      for (Index = 0; Index < OrderListSize / sizeof (UINT16); Index++) {
        if (OptionNumber == OrderList[Index]) {
          break;
        }
      }
    }

    if (Index < OrderListSize / sizeof (UINT16)) {
      //
      // The OptionNumber occurs in the OrderList, continue to use next one
      //
      continue;
    }
    UnicodeSPrint (StrTemp, sizeof (StrTemp), L"%s%04x", Type, (UINTN) OptionNumber);
    DEBUG((EFI_D_ERROR,"Option = %s\n", StrTemp));
    OptionBuffer = BdsLibGetVariableAndSize (
                       StrTemp,
                       &gEfiGlobalVariableGuid,
                       &OptionSize
                       );
    if (NULL == OptionBuffer) {
      //
      // The Boot[OptionNumber] / Driver[OptionNumber] NOT occurs, we found it
      //
      break;
    }
  }

  return OptionNumber;
}

/**

  Get the Option Number for Boot#### that does not used.

  @return The available Option Number.

**/
UINT16
BOpt_GetBootOptionNumber (
  VOID
  )
{
  return BOpt_GetOptionNumber (L"Boot");
}

/**

  Get the Option Number for Driver#### that does not used.

  @return The unused Option Number.

**/
UINT16
BOpt_GetDriverOptionNumber (
  VOID
  )
{
  return BOpt_GetOptionNumber (L"Driver");
}

/**

  Build up all DriverOptionMenu

  @param CallbackData The BMM context data.

  @retval EFI_SUCESS           The functin completes successfully.
  @retval EFI_OUT_OF_RESOURCES Not enough memory to compete the operation.
  @retval EFI_NOT_FOUND        Fail to get "DriverOrder" variable.

**/
EFI_STATUS
BOpt_GetDriverOptions (
  IN  BMM_CALLBACK_DATA         *CallbackData
  )
{
  UINTN           Index;
  UINT16          DriverString[12];
  UINT8           *LoadOptionFromVar;
  UINT8           *LoadOption;
  UINTN           DriverOptionSize;

  UINT16          *DriverOrderList;
  UINTN           DriverOrderListSize;
  BM_MENU_ENTRY   *NewMenuEntry;
  BM_LOAD_CONTEXT *NewLoadContext;
  UINT8           *LoadOptionPtr;
  UINTN           StringSize;
  UINTN           OptionalDataSize;
  UINT8           *LoadOptionEnd;

  DriverOrderListSize = 0;
  DriverOrderList     = NULL;
  DriverOptionSize    = 0;
  LoadOptionFromVar   = NULL;
  BOpt_FreeMenu (&DriverOptionMenu);
  InitializeListHead (&DriverOptionMenu.Head);
  //
  // Get the DriverOrder from the Var
  //
  DriverOrderList = BdsLibGetVariableAndSize (
                      L"DriverOrder",
                      &gEfiGlobalVariableGuid,
                      &DriverOrderListSize
                      );
  if (DriverOrderList == NULL) {
    return EFI_NOT_FOUND;
  }

  for (Index = 0; Index < DriverOrderListSize / sizeof (UINT16); Index++) {
    UnicodeSPrint (
      DriverString,
      sizeof (DriverString),
      L"Driver%04x",
      DriverOrderList[Index]
      );
    //
    //  Get all loadoptions from the VAR
    //
    LoadOptionFromVar = BdsLibGetVariableAndSize (
                          DriverString,
                          &gEfiGlobalVariableGuid,
                          &DriverOptionSize
                          );
    if (LoadOptionFromVar == NULL) {
      continue;
    }

    LoadOption = AllocateZeroPool (DriverOptionSize);
    if (LoadOption == NULL) {
      continue;
    }

    CopyMem (LoadOption, LoadOptionFromVar, DriverOptionSize);
    FreePool (LoadOptionFromVar);

    NewMenuEntry = BOpt_CreateMenuEntry (BM_LOAD_CONTEXT_SELECT);
    if (NULL == NewMenuEntry) {
      return EFI_OUT_OF_RESOURCES;
    }

    NewLoadContext                      = (BM_LOAD_CONTEXT *) NewMenuEntry->VariableContext;
    LoadOptionPtr                       = LoadOption;
    LoadOptionEnd                       = LoadOption + DriverOptionSize;
    NewMenuEntry->OptionNumber          = DriverOrderList[Index];
    NewLoadContext->LoadOptionModified  = FALSE;
    NewLoadContext->Deleted             = FALSE;
    NewLoadContext->IsLegacy            = FALSE;

    //
    // LoadOption is a pointer type of UINT8
    // for easy use with following LOAD_OPTION
    // embedded in this struct
    //
    NewLoadContext->LoadOption      = LoadOption;
    NewLoadContext->LoadOptionSize  = DriverOptionSize;

    NewLoadContext->Attributes      = *(UINT32 *) LoadOptionPtr;
    NewLoadContext->IsActive        = (BOOLEAN) (NewLoadContext->Attributes & LOAD_OPTION_ACTIVE);

    NewLoadContext->ForceReconnect  = (BOOLEAN) (NewLoadContext->Attributes & LOAD_OPTION_FORCE_RECONNECT);

    LoadOptionPtr += sizeof (UINT32);

    NewLoadContext->FilePathListLength = *(UINT16 *) LoadOptionPtr;
    LoadOptionPtr += sizeof (UINT16);

    StringSize                  = StrSize ((UINT16 *) LoadOptionPtr);
    NewLoadContext->Description = AllocateZeroPool (StringSize);
    ASSERT (NewLoadContext->Description != NULL);
    CopyMem (
      NewLoadContext->Description,
      (UINT16 *) LoadOptionPtr,
      StringSize
      );
    NewMenuEntry->DisplayString = NewLoadContext->Description;

    LoadOptionPtr += StringSize;

    NewLoadContext->FilePathList = AllocateZeroPool (NewLoadContext->FilePathListLength);
    ASSERT (NewLoadContext->FilePathList != NULL);
    CopyMem (
      NewLoadContext->FilePathList,
      (EFI_DEVICE_PATH_PROTOCOL *) LoadOptionPtr,
      NewLoadContext->FilePathListLength
      );

    NewMenuEntry->HelpString = DevicePathToStr (NewLoadContext->FilePathList);
    NewMenuEntry->DisplayStringToken = GetStringTokenFromDepository (
                                        CallbackData,
                                        DriverOptionStrDepository
                                        );
    NewMenuEntry->HelpStringToken = GetStringTokenFromDepository (
                                      CallbackData,
                                      DriverOptionHelpStrDepository
                                      );
    LoadOptionPtr += NewLoadContext->FilePathListLength;

    if (LoadOptionPtr < LoadOptionEnd) {
      OptionalDataSize = DriverOptionSize -
        sizeof (UINT32) -
        sizeof (UINT16) -
        StringSize -
        NewLoadContext->FilePathListLength;

      NewLoadContext->OptionalData = AllocateZeroPool (OptionalDataSize);
      ASSERT (NewLoadContext->OptionalData != NULL);
      CopyMem (
        NewLoadContext->OptionalData,
        LoadOptionPtr,
        OptionalDataSize
        );

      NewLoadContext->OptionalDataSize = OptionalDataSize;
    }

    InsertTailList (&DriverOptionMenu.Head, &NewMenuEntry->Link);

  }

  if (DriverOrderList != NULL) {
    FreePool (DriverOrderList);
  }
  DriverOptionMenu.MenuNumber = Index;
  return EFI_SUCCESS;

}

/**
  Get option number according to Boot#### and BootOrder variable.
  The value is saved as #### + 1.

  @param CallbackData    The BMM context data.
**/
VOID
GetBootOrder (
  IN  BMM_CALLBACK_DATA    *CallbackData
  )
{
  BMM_FAKE_NV_DATA          *BmmConfig;
  UINT16                    Index;
  UINT16                    OptionOrderIndex;
  UINTN                     DeviceType;
  BM_MENU_ENTRY             *NewMenuEntry;
  BM_LOAD_CONTEXT           *NewLoadContext;

  ASSERT (CallbackData != NULL);

  DeviceType = (UINTN) -1;
  BmmConfig  = &CallbackData->BmmFakeNvData;
  ZeroMem (BmmConfig->BootOptionOrder, sizeof (BmmConfig->BootOptionOrder));

  for (Index = 0, OptionOrderIndex = 0; ((Index < BootOptionMenu.MenuNumber) &&
       (OptionOrderIndex < (sizeof (BmmConfig->BootOptionOrder) / sizeof (BmmConfig->BootOptionOrder[0]))));
       Index++) {
    NewMenuEntry   = BOpt_GetMenuEntry (&BootOptionMenu, Index);
    NewLoadContext = (BM_LOAD_CONTEXT *) NewMenuEntry->VariableContext;

    if (NewLoadContext->IsLegacy) {
      if (((BBS_BBS_DEVICE_PATH *) NewLoadContext->FilePathList)->DeviceType != DeviceType) {
        DeviceType = ((BBS_BBS_DEVICE_PATH *) NewLoadContext->FilePathList)->DeviceType;
      } else {
        //
        // Only show one legacy boot option for the same device type
        // assuming the boot options are grouped by the device type
        //
        continue;
      }
    }
    BmmConfig->BootOptionOrder[OptionOrderIndex++] = (UINT32) (NewMenuEntry->OptionNumber + 1);
  }
}

/**
  According to LegacyDevOrder variable to get legacy FD\HD\CD\NET\BEV
  devices list .

  @param CallbackData    The BMM context data.
**/
VOID
GetLegacyDeviceOrder (
  IN  BMM_CALLBACK_DATA    *CallbackData
  )
{
  UINTN                     Index;
  UINTN                     OptionIndex;
  UINT16                    PageIdList[5];
  UINTN                     PageNum;
  UINTN                     VarSize;
  UINT8                     *VarData;
  UINT8                     *WorkingVarData;
  LEGACY_DEV_ORDER_ENTRY    *DevOrder;
  UINT16                    VarDevOrder;
  UINT8                     *DisMap;
  BM_MENU_OPTION            *OptionMenu;
  BBS_TYPE                  BbsType;
  UINT8                     *LegacyOrder;
  UINT8                     *OldData;
  UINTN                     Pos;
  UINTN                     Bit;

  ASSERT (CallbackData != NULL);

  PageIdList[0] = FORM_SET_FD_ORDER_ID;
  PageIdList[1] = FORM_SET_HD_ORDER_ID;
  PageIdList[2] = FORM_SET_CD_ORDER_ID;
  PageIdList[3] = FORM_SET_NET_ORDER_ID;
  PageIdList[4] = FORM_SET_BEV_ORDER_ID;
  OptionMenu  = NULL;
  BbsType     = 0;
  LegacyOrder = NULL;
  OldData     = NULL;
  DisMap      = ZeroMem (CallbackData->BmmFakeNvData.DisableMap, sizeof (CallbackData->BmmFakeNvData.DisableMap));
  PageNum     = ARRAY_SIZE (PageIdList);
  VarData     = BdsLibGetVariableAndSize (
                  VAR_LEGACY_DEV_ORDER,
                  &gEfiLegacyDevOrderVariableGuid,
                  &VarSize
                  );

  for (Index = 0; Index < PageNum; Index++) {
    switch (PageIdList[Index]) {

    case FORM_SET_FD_ORDER_ID:
      OptionMenu  = (BM_MENU_OPTION *) &LegacyFDMenu;
      BbsType     = BBS_FLOPPY;
      LegacyOrder = CallbackData->BmmFakeNvData.LegacyFD;
      OldData     = CallbackData->BmmOldFakeNVData.LegacyFD;
      break;

    case FORM_SET_HD_ORDER_ID:
      OptionMenu  = (BM_MENU_OPTION *) &LegacyHDMenu;
      BbsType     = BBS_HARDDISK;
      LegacyOrder = CallbackData->BmmFakeNvData.LegacyHD;
      OldData     = CallbackData->BmmOldFakeNVData.LegacyHD;
      break;

    case FORM_SET_CD_ORDER_ID:
      OptionMenu  = (BM_MENU_OPTION *) &LegacyCDMenu;
      BbsType     = BBS_CDROM;
      LegacyOrder = CallbackData->BmmFakeNvData.LegacyCD;
      OldData     = CallbackData->BmmOldFakeNVData.LegacyCD;
      break;

    case FORM_SET_NET_ORDER_ID:
      OptionMenu  = (BM_MENU_OPTION *) &LegacyNETMenu;
      BbsType     = BBS_EMBED_NETWORK;
      LegacyOrder = CallbackData->BmmFakeNvData.LegacyNET;
      OldData     = CallbackData->BmmOldFakeNVData.LegacyNET;
      break;

    default:
      ASSERT (PageIdList[Index] == FORM_SET_BEV_ORDER_ID);
      OptionMenu  = (BM_MENU_OPTION *) &LegacyBEVMenu;
      BbsType     = BBS_BEV_DEVICE;
      LegacyOrder = CallbackData->BmmFakeNvData.LegacyBEV;
      OldData     = CallbackData->BmmOldFakeNVData.LegacyBEV;
      break;
    }

    if (NULL != VarData) {
      WorkingVarData = VarData;
      DevOrder    = (LEGACY_DEV_ORDER_ENTRY *) WorkingVarData;
      while (WorkingVarData < VarData + VarSize) {
        if (DevOrder->BbsType == BbsType) {
          break;
        }

        WorkingVarData  = (UINT8 *)((UINTN)WorkingVarData + sizeof (BBS_TYPE));
        WorkingVarData += *(UINT16 *) WorkingVarData;
        DevOrder = (LEGACY_DEV_ORDER_ENTRY *) WorkingVarData;
      }
      for (OptionIndex = 0; OptionIndex < OptionMenu->MenuNumber; OptionIndex++) {
        VarDevOrder = *(UINT16 *) ((UINTN) DevOrder + sizeof (BBS_TYPE) + sizeof (UINT16) + OptionIndex * sizeof (UINT16));
         if (0xFF00 == (VarDevOrder & 0xFF00)) {
          LegacyOrder[OptionIndex]  = 0xFF;
          Pos                       = (VarDevOrder & 0xFF) / 8;
          Bit                       = 7 - ((VarDevOrder & 0xFF) % 8);
          DisMap[Pos] = (UINT8) (DisMap[Pos] | (UINT8) (1 << Bit));
        } else {
          LegacyOrder[OptionIndex] = (UINT8) (VarDevOrder & 0xFF);
        }
      }
      CopyMem (OldData, LegacyOrder, 100);
    }
  }
}

/**
  Get driver option order from globalc DriverOptionMenu.

  @param CallbackData    The BMM context data.

**/
VOID
GetDriverOrder (
  IN  BMM_CALLBACK_DATA    *CallbackData
  )
{
  BMM_FAKE_NV_DATA          *BmmConfig;
  UINT16                    Index;
  UINT16                    OptionOrderIndex;
  UINTN                     DeviceType;
  BM_MENU_ENTRY             *NewMenuEntry;
  BM_LOAD_CONTEXT           *NewLoadContext;

  ASSERT (CallbackData != NULL);

  DeviceType = (UINTN) -1;
  BmmConfig  = &CallbackData->BmmFakeNvData;
  ZeroMem (BmmConfig->DriverOptionOrder, sizeof (BmmConfig->DriverOptionOrder));

  for (Index = 0, OptionOrderIndex = 0; ((Index < DriverOptionMenu.MenuNumber) &&
       (OptionOrderIndex < (sizeof (BmmConfig->DriverOptionOrder) / sizeof (BmmConfig->DriverOptionOrder[0]))));
       Index++) {
    NewMenuEntry   = BOpt_GetMenuEntry (&DriverOptionMenu, Index);
    NewLoadContext = (BM_LOAD_CONTEXT *) NewMenuEntry->VariableContext;

    if (NewLoadContext->IsLegacy) {
      if (((BBS_BBS_DEVICE_PATH *) NewLoadContext->FilePathList)->DeviceType != DeviceType) {
        DeviceType = ((BBS_BBS_DEVICE_PATH *) NewLoadContext->FilePathList)->DeviceType;
      } else {
        //
        // Only show one legacy boot option for the same device type
        // assuming the boot options are grouped by the device type
        //
        continue;
      }
    }
    BmmConfig->DriverOptionOrder[OptionOrderIndex++] = (UINT32) (NewMenuEntry->OptionNumber + 1);
  }
}