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

  Include file system navigation, system handle selection

  Boot option manipulation

Copyright (c) 2004 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include "BootMaintenanceManager.h"

///
/// Define the maximum characters that will be accepted.
///
#define MAX_CHAR            480

/**

  Check whether a reset is needed, if reset is needed, Popup a menu to notice user.

**/
VOID
BmmSetupResetReminder (
  VOID
  )
{
  EFI_INPUT_KEY                 Key;
  CHAR16                        *StringBuffer1;
  CHAR16                        *StringBuffer2;
  EFI_STATUS                    Status;
  EDKII_FORM_BROWSER_EXTENSION2_PROTOCOL *FormBrowserEx2;

  //
  // Use BrowserEx2 protocol to check whether reset is required.
  //
  Status = gBS->LocateProtocol (&gEdkiiFormBrowserEx2ProtocolGuid, NULL, (VOID **) &FormBrowserEx2);

  //
  //check any reset required change is applied? if yes, reset system
  //
  if (!EFI_ERROR(Status) && FormBrowserEx2->IsResetRequired()) {
    StringBuffer1 = AllocateZeroPool (MAX_CHAR * sizeof (CHAR16));
    ASSERT (StringBuffer1 != NULL);
    StringBuffer2 = AllocateZeroPool (MAX_CHAR * sizeof (CHAR16));
    ASSERT (StringBuffer2 != NULL);
    StrCpyS (StringBuffer1, MAX_CHAR, L"Configuration changed. Reset to apply it Now.");
    StrCpyS (StringBuffer2, MAX_CHAR, L"Press ENTER to reset");
    //
    // Popup a menu to notice user
    //
    do {
      CreatePopUp (EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE, &Key, StringBuffer1, StringBuffer2, NULL);
    } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

    FreePool (StringBuffer1);
    FreePool (StringBuffer2);

    gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
  }
}

/**
  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;

  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;

  //
  //  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);
    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;

  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;
}

/**
  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;
}

/**

  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;
  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;
  EFI_BOOT_MANAGER_LOAD_OPTION  *BootOption;
  UINTN                         BootOptionCount;  
  
  MenuCount         = 0;
  BootOrderListSize = 0;
  BootNextSize      = 0;
  BootOrderList     = NULL;
  BootNext          = NULL;
  LoadOptionFromVar = NULL;
  BOpt_FreeMenu (&BootOptionMenu);
  InitializeListHead (&BootOptionMenu.Head);

  //
  // Get the BootOrder from the Var
  //
  GetEfiGlobalVariable2 (L"BootOrder", (VOID **) &BootOrderList, &BootOrderListSize);
  if (BootOrderList == NULL) {
    return EFI_NOT_FOUND;
  }
  
  //
  // Get the BootNext from the Var
  //
  GetEfiGlobalVariable2 (L"BootNext", (VOID **) &BootNext, &BootNextSize);
  if (BootNext != NULL) {
    if (BootNextSize != sizeof (UINT16)) {
      FreePool (BootNext);
      BootNext = NULL;
    }
  }
  BootOption = EfiBootManagerGetLoadOptions (&BootOptionCount, LoadOptionTypeBoot);
  for (Index = 0; Index < BootOrderListSize / sizeof (UINT16); Index++) {
    //
    // Don't display the hidden/inactive boot option
    //
    if (((BootOption[Index].Attributes & LOAD_OPTION_HIDDEN) != 0) || ((BootOption[Index].Attributes & LOAD_OPTION_ACTIVE) == 0)) {
      continue;
    }
      
    UnicodeSPrint (BootString, sizeof (BootString), L"Boot%04x", BootOrderList[Index]);
    //
    //  Get all loadoptions from the VAR
    //
    GetEfiGlobalVariable2 (BootString, (VOID **) &LoadOptionFromVar, &BootOptionSize);
    if (LoadOptionFromVar == NULL) {
      continue;
    }

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

    NewMenuEntry = BOpt_CreateMenuEntry (BM_LOAD_CONTEXT_SELECT);
    ASSERT (NULL != NewMenuEntry);

    NewLoadContext                      = (BM_LOAD_CONTEXT *) NewMenuEntry->VariableContext;

    LoadOptionPtr                       = LoadOptionFromVar;
    LoadOptionEnd                       = LoadOptionFromVar + BootOptionSize;

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

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

    //
    // 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->Attributes      = *(UINT32 *) LoadOptionPtr;

    LoadOptionPtr += sizeof (UINT32);

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

    NewLoadContext->Description = AllocateZeroPool (StrSize((UINT16*)LoadOptionPtr));
    ASSERT (NewLoadContext->Description != NULL);
    StrCpyS (NewLoadContext->Description, StrSize((UINT16*)LoadOptionPtr) / sizeof (UINT16), (UINT16*)LoadOptionPtr);
    
    ASSERT (NewLoadContext->Description != NULL);
    NewMenuEntry->DisplayString = NewLoadContext->Description;
    NewMenuEntry->DisplayStringToken = HiiSetString (CallbackData->BmmHiiHandle, 0, NewMenuEntry->DisplayString, NULL);

    LoadOptionPtr += StringSize;

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

    NewMenuEntry->HelpString = UiDevicePathToStr (NewLoadContext->FilePathList);
    NewMenuEntry->HelpStringToken = HiiSetString (CallbackData->BmmHiiHandle, 0, NewMenuEntry->HelpString, NULL); 

    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
        );
    }

    InsertTailList (&BootOptionMenu.Head, &NewMenuEntry->Link);
    MenuCount++;
    FreePool (LoadOptionFromVar);
  }
  EfiBootManagerFreeLoadOptions (BootOption, BootOptionCount);

  if (BootNext != NULL) {
    FreePool (BootNext);
  }
  if (BootOrderList != NULL) {
    FreePool (BootOrderList);
  }

  BootOptionMenu.MenuNumber = MenuCount;
  return EFI_SUCCESS;
}

/**

  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 = UiDevicePathToStr (NewHandleContext->DevicePath);
    NewMenuEntry->DisplayStringToken = HiiSetString (mBmmCallbackInfo->BmmHiiHandle,0,NewMenuEntry->DisplayString,NULL);
    NewMenuEntry->HelpString    = NULL;
    NewMenuEntry->HelpStringToken = NewMenuEntry->DisplayStringToken;
    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);

  GetEfiGlobalVariable2 (StrTemp, (VOID **) &OrderList, &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));
    GetEfiGlobalVariable2 (StrTemp, (VOID **) &OptionBuffer, &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;
  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
  //
  GetEfiGlobalVariable2 (L"DriverOrder", (VOID **) &DriverOrderList, &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
    //
    GetEfiGlobalVariable2 (DriverString, (VOID **) &LoadOptionFromVar, &DriverOptionSize);
    if (LoadOptionFromVar == NULL) {
      continue;
    }


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

    NewLoadContext                      = (BM_LOAD_CONTEXT *) NewMenuEntry->VariableContext;
    LoadOptionPtr                       = LoadOptionFromVar;
    LoadOptionEnd                       = LoadOptionFromVar + DriverOptionSize;
    NewMenuEntry->OptionNumber          = DriverOrderList[Index];
    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->Attributes      = *(UINT32 *) LoadOptionPtr;

    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;
    NewMenuEntry->DisplayStringToken = HiiSetString (CallbackData->BmmHiiHandle, 0, NewMenuEntry->DisplayString, NULL);

    LoadOptionPtr += StringSize;

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

    NewMenuEntry->HelpString = UiDevicePathToStr (NewLoadContext->FilePathList);
    NewMenuEntry->HelpStringToken = HiiSetString (CallbackData->BmmHiiHandle, 0, NewMenuEntry->HelpString, NULL); 

    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
        );

    }

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

  }

  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);
  }  
}

/**
  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);
  }  
}  

/**
  Boot the file specified by the input file path info.

  @param FilePath    Point to the file path.

  @retval TRUE   Exit caller function.
  @retval FALSE  Not exit caller function.
**/
BOOLEAN 
EFIAPI
BootFromFile (
  IN EFI_DEVICE_PATH_PROTOCOL    *FilePath
  )
{
  EFI_BOOT_MANAGER_LOAD_OPTION BootOption;
  CHAR16                       *FileName;

  FileName = NULL;

  FileName = ExtractFileNameFromDevicePath(FilePath);
  if (FileName != NULL) {
    EfiBootManagerInitializeLoadOption (
      &BootOption,
      0,
      LoadOptionTypeBoot,
      LOAD_OPTION_ACTIVE,
      FileName,
      FilePath,
      NULL,
      0
      );
    //
    // Since current no boot from removable media directly is allowed */
    //
    gST->ConOut->ClearScreen (gST->ConOut);
    //
    // Check whether need to reset system.
    //
    BmmSetupResetReminder ();

    BmmSetConsoleMode (FALSE);
    EfiBootManagerBoot (&BootOption);
    BmmSetConsoleMode (TRUE);

    FreePool(FileName);

    EfiBootManagerFreeLoadOption (&BootOption);
  }

  return FALSE;
}

/**
  Display the form base on the selected file.

  @param FilePath   Point to the file path.
  @param FormId     The form need to display.

**/
BOOLEAN
ReSendForm(
  IN  EFI_DEVICE_PATH_PROTOCOL  *FilePath,
  IN  EFI_FORM_ID               FormId
  )
{
  gBootMaintenancePrivate.LoadContext->FilePathList = FilePath;

  UpdateOptionPage(&gBootMaintenancePrivate, FormId, FilePath);

  gBootMaintenancePrivate.FormBrowser2->SendForm (
                         gBootMaintenancePrivate.FormBrowser2,
                         &gBootMaintenancePrivate.BmmHiiHandle,
                         1,
                         &mBootMaintGuid,
                         FormId,
                         NULL,
                         NULL
                         );
  return TRUE;
}

/**
  Create boot option base on the input file path info.

  @param FilePath    Point to the file path.

  @retval TRUE   Exit caller function.
  @retval FALSE  Not exit caller function.
**/
BOOLEAN 
EFIAPI
CreateBootOptionFromFile (
  IN EFI_DEVICE_PATH_PROTOCOL    *FilePath
  )
{
  return ReSendForm(FilePath, FORM_BOOT_ADD_ID);
}

/**
  Create driver option base on the input file path info.

  @param FilePath    Point to the file path.

  @retval TRUE   Exit caller function.
  @retval FALSE  Not exit caller function.

**/
BOOLEAN 
EFIAPI
CreateDriverOptionFromFile (
  IN EFI_DEVICE_PATH_PROTOCOL    *FilePath
  )
{
  return ReSendForm(FilePath, FORM_DRV_ADD_FILE_ID);
}