/** @file
  FrontPage routines to handle the callbacks and browser calls

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 "FrontPage.h"
#include "Language.h"
#define MAX_STRING_LEN        200

EFI_GUID   mFrontPageGuid      = FRONT_PAGE_FORMSET_GUID;

BOOLEAN   gConnectAllHappened = FALSE;
BOOLEAN   mFeaturerSwitch = TRUE;
BOOLEAN   mResetRequired  = FALSE;

EFI_FORM_BROWSER2_PROTOCOL      *gFormBrowser2;
CHAR8     *mLanguageString;
BOOLEAN   mModeInitialized = FALSE;
//
// Boot video resolution and text mode.
//
UINT32    mBootHorizontalResolution    = 0;
UINT32    mBootVerticalResolution      = 0;
UINT32    mBootTextModeColumn          = 0;
UINT32    mBootTextModeRow             = 0;
//
// BIOS setup video resolution and text mode.
//
UINT32    mSetupTextModeColumn         = 0;
UINT32    mSetupTextModeRow            = 0;
UINT32    mSetupHorizontalResolution   = 0;
UINT32    mSetupVerticalResolution     = 0;

FRONT_PAGE_CALLBACK_DATA  gFrontPagePrivate = {
  FRONT_PAGE_CALLBACK_DATA_SIGNATURE,
  NULL,
  NULL,
  NULL,
  {
    FakeExtractConfig,
    FakeRouteConfig,
    FrontPageCallback
  }
};

HII_VENDOR_DEVICE_PATH  mFrontPageHiiVendorDevicePath = {
  {
    {
      HARDWARE_DEVICE_PATH,
      HW_VENDOR_DP,
      {
        (UINT8) (sizeof (VENDOR_DEVICE_PATH)),
        (UINT8) ((sizeof (VENDOR_DEVICE_PATH)) >> 8)
      }
    },
    //
    // {8E6D99EE-7531-48f8-8745-7F6144468FF2}
    //
    { 0x8e6d99ee, 0x7531, 0x48f8, { 0x87, 0x45, 0x7f, 0x61, 0x44, 0x46, 0x8f, 0xf2 } }
  },
  {
    END_DEVICE_PATH_TYPE,
    END_ENTIRE_DEVICE_PATH_SUBTYPE,
    {
      (UINT8) (END_DEVICE_PATH_LENGTH),
      (UINT8) ((END_DEVICE_PATH_LENGTH) >> 8)
    }
  }
};

/**
  Update the banner information for the Front Page based on Smbios information.

**/
VOID
UpdateFrontPageStrings (
  VOID
  );

/**
  This function allows a caller to extract the current configuration for one
  or more named elements from the target driver.


  @param This            Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param Request         A null-terminated Unicode string in <ConfigRequest> format.
  @param Progress        On return, points to a character in the Request string.
                         Points to the string's null terminator if request was successful.
                         Points to the most recent '&' before the first failing name/value
                         pair (or the beginning of the string if the failure is in the
                         first name/value pair) if the request was not successful.
  @param Results         A null-terminated Unicode string in <ConfigAltResp> format which
                         has all values filled in for the names in the Request string.
                         String to be allocated by the called function.

  @retval  EFI_SUCCESS            The Results is filled with the requested values.
  @retval  EFI_OUT_OF_RESOURCES   Not enough memory to store the results.
  @retval  EFI_INVALID_PARAMETER  Request is illegal syntax, or unknown name.
  @retval  EFI_NOT_FOUND          Routing data doesn't match any storage in this driver.

**/
EFI_STATUS
EFIAPI
FakeExtractConfig (
  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL   *This,
  IN  CONST EFI_STRING                       Request,
  OUT EFI_STRING                             *Progress,
  OUT EFI_STRING                             *Results
  )
{
  if (Progress == NULL || Results == NULL) {
    return EFI_INVALID_PARAMETER;
  }
  *Progress = Request;
  return EFI_NOT_FOUND;
}

/**
  This function processes the results of changes in configuration.


  @param This            Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param Configuration   A null-terminated Unicode string in <ConfigResp> format.
  @param Progress        A pointer to a string filled in with the offset of the most
                         recent '&' before the first failing name/value pair (or the
                         beginning of the string if the failure is in the first
                         name/value pair) or the terminating NULL if all was successful.

  @retval  EFI_SUCCESS            The Results is processed successfully.
  @retval  EFI_INVALID_PARAMETER  Configuration is NULL.
  @retval  EFI_NOT_FOUND          Routing data doesn't match any storage in this driver.

**/
EFI_STATUS
EFIAPI
FakeRouteConfig (
  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL   *This,
  IN  CONST EFI_STRING                       Configuration,
  OUT EFI_STRING                             *Progress
  )
{
  if (Configuration == NULL || Progress == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  return EFI_NOT_FOUND;
}

/**
  Create oneof options for language.

**/
VOID
InitializeLanguage (
  VOID
  )
{
  EFI_STATUS                  Status;
  CHAR8                       *LangCode;
  CHAR8                       *Lang;
  CHAR8                       *CurrentLang;
  UINTN                       OptionCount;
  CHAR16                      *StringBuffer;
  EFI_HII_HANDLE              HiiHandle;
  VOID                        *OptionsOpCodeHandle;
  VOID                        *StartOpCodeHandle;
  VOID                        *EndOpCodeHandle;
  EFI_IFR_GUID_LABEL          *StartLabel;
  EFI_IFR_GUID_LABEL          *EndLabel;    
  EFI_HII_STRING_PROTOCOL     *HiiString;
  UINTN                       StringSize;

  Lang         = NULL;
  StringBuffer = NULL;

  //
  // Init OpCode Handle and Allocate space for creation of UpdateData Buffer
  //
  StartOpCodeHandle = HiiAllocateOpCodeHandle ();
  ASSERT (StartOpCodeHandle != NULL);

  EndOpCodeHandle = HiiAllocateOpCodeHandle ();
  ASSERT (EndOpCodeHandle != NULL);

  OptionsOpCodeHandle = HiiAllocateOpCodeHandle ();
  ASSERT (OptionsOpCodeHandle != NULL);
  //
  // Create Hii Extend Label OpCode as the start opcode
  //
  StartLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (StartOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
  StartLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
  StartLabel->Number       = LABEL_SELECT_LANGUAGE;

  //
  // Create Hii Extend Label OpCode as the end opcode
  //
  EndLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (EndOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
  EndLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
  EndLabel->Number       = LABEL_END;
  //
  // Collect the languages from what our current Language support is based on our VFR
  //
  HiiHandle = gFrontPagePrivate.HiiHandle;

  GetEfiGlobalVariable2 (L"PlatformLang", (VOID**)&CurrentLang, NULL);

  if (mLanguageString == NULL) {
    //
    // Get Support language list from variable.
    //
    GetEfiGlobalVariable2 (L"PlatformLangCodes", (VOID**)&mLanguageString, NULL);
    if (mLanguageString == NULL) {
      mLanguageString = AllocateCopyPool (
                                 AsciiStrSize ((CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLangCodes)),
                                 (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLangCodes)
                                 );
      ASSERT (mLanguageString != NULL);
    }
  }

  if (gFrontPagePrivate.LanguageToken == NULL) {
    //
    // Count the language list number.
    //  
    LangCode      = mLanguageString;
    Lang          = AllocatePool (AsciiStrSize (mLanguageString));
    ASSERT (Lang != NULL);
    OptionCount = 0;
    while (*LangCode != 0) {
      GetNextLanguage (&LangCode, Lang);
      OptionCount ++;
    }

    //
    // Allocate extra 1 as the end tag.
    //
    gFrontPagePrivate.LanguageToken = AllocateZeroPool ((OptionCount + 1) * sizeof (EFI_STRING_ID));
    ASSERT (gFrontPagePrivate.LanguageToken != NULL);

    Status = gBS->LocateProtocol (&gEfiHiiStringProtocolGuid, NULL, (VOID **) &HiiString);
    ASSERT_EFI_ERROR (Status);

    LangCode     = mLanguageString;
    OptionCount  = 0;
    while (*LangCode != 0) {
      GetNextLanguage (&LangCode, Lang);

      StringSize = 0;
      Status = HiiString->GetString (HiiString, Lang, HiiHandle, PRINTABLE_LANGUAGE_NAME_STRING_ID, StringBuffer, &StringSize, NULL);
      if (Status == EFI_BUFFER_TOO_SMALL) {
        StringBuffer = AllocateZeroPool (StringSize);
        ASSERT (StringBuffer != NULL);
        Status = HiiString->GetString (HiiString, Lang, HiiHandle, PRINTABLE_LANGUAGE_NAME_STRING_ID, StringBuffer, &StringSize, NULL);
        ASSERT_EFI_ERROR (Status);
      }

      if (EFI_ERROR (Status)) {
        StringBuffer = AllocatePool (AsciiStrSize (Lang) * sizeof (CHAR16));
        ASSERT (StringBuffer != NULL);
        AsciiStrToUnicodeStr (Lang, StringBuffer);
      }

      ASSERT (StringBuffer != NULL);
      gFrontPagePrivate.LanguageToken[OptionCount] = HiiSetString (HiiHandle, 0, StringBuffer, NULL);
      FreePool (StringBuffer);

      OptionCount++;
    }
  }

  ASSERT (gFrontPagePrivate.LanguageToken != NULL);
  LangCode     = mLanguageString;
  OptionCount  = 0;
  if (Lang == NULL) {
    Lang = AllocatePool (AsciiStrSize (mLanguageString));
    ASSERT (Lang != NULL);
  }
  while (*LangCode != 0) {
    GetNextLanguage (&LangCode, Lang);

    if (CurrentLang != NULL && AsciiStrCmp (Lang, CurrentLang) == 0) {
      HiiCreateOneOfOptionOpCode (
        OptionsOpCodeHandle,
        gFrontPagePrivate.LanguageToken[OptionCount],
        EFI_IFR_OPTION_DEFAULT,
        EFI_IFR_NUMERIC_SIZE_1,
        (UINT8) OptionCount
        );
    } else {
      HiiCreateOneOfOptionOpCode (
        OptionsOpCodeHandle,
        gFrontPagePrivate.LanguageToken[OptionCount],
        0,
        EFI_IFR_NUMERIC_SIZE_1,
        (UINT8) OptionCount
        );
    }

    OptionCount++;
  }

  if (CurrentLang != NULL) {
    FreePool (CurrentLang);
  }
  FreePool (Lang);

  HiiCreateOneOfOpCode (
    StartOpCodeHandle,
    FRONT_PAGE_KEY_LANGUAGE,
    0,
    0,
    STRING_TOKEN (STR_LANGUAGE_SELECT),
    STRING_TOKEN (STR_LANGUAGE_SELECT_HELP),
    EFI_IFR_FLAG_CALLBACK,
    EFI_IFR_NUMERIC_SIZE_1,
    OptionsOpCodeHandle,
    NULL
    );

  Status = HiiUpdateForm (
             HiiHandle,
             &mFrontPageGuid,
             FRONT_PAGE_FORM_ID,
             StartOpCodeHandle, // LABEL_SELECT_LANGUAGE
             EndOpCodeHandle    // LABEL_END
             );

  HiiFreeOpCodeHandle (StartOpCodeHandle);
  HiiFreeOpCodeHandle (EndOpCodeHandle);
  HiiFreeOpCodeHandle (OptionsOpCodeHandle);
}

/**
  This function processes the results of changes in configuration.


  @param This            Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param Action          Specifies the type of action taken by the browser.
  @param QuestionId      A unique value which is sent to the original exporting driver
                         so that it can identify the type of data to expect.
  @param Type            The type of value for the question.
  @param Value           A pointer to the data being sent to the original exporting driver.
  @param ActionRequest   On return, points to the action requested by the callback function.

  @retval  EFI_SUCCESS           The callback successfully handled the action.
  @retval  EFI_OUT_OF_RESOURCES  Not enough storage is available to hold the variable and its data.
  @retval  EFI_DEVICE_ERROR      The variable could not be saved.
  @retval  EFI_UNSUPPORTED       The specified Action is not supported by the callback.

**/
EFI_STATUS
EFIAPI
FrontPageCallback (
  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL   *This,
  IN  EFI_BROWSER_ACTION                     Action,
  IN  EFI_QUESTION_ID                        QuestionId,
  IN  UINT8                                  Type,
  IN  EFI_IFR_TYPE_VALUE                     *Value,
  OUT EFI_BROWSER_ACTION_REQUEST             *ActionRequest
  )
{
  CHAR8                         *LangCode;
  CHAR8                         *Lang;
  UINTN                         Index;
  EFI_STATUS                    Status;

  if (Action != EFI_BROWSER_ACTION_CHANGED) {
    //
    // Do nothing for other UEFI Action. Only do call back when data is changed.
    //
    return EFI_UNSUPPORTED;
  }

  if (Action == EFI_BROWSER_ACTION_CHANGED) {
    if ((Value == NULL) || (ActionRequest == NULL)) {
      return EFI_INVALID_PARAMETER;
    }

    switch (QuestionId) {
    case FRONT_PAGE_KEY_CONTINUE:
      //
      // This is the continue - clear the screen and return an error to get out of FrontPage loop
      //
      *ActionRequest = EFI_BROWSER_ACTION_REQUEST_EXIT;
      break;

    case FRONT_PAGE_KEY_LANGUAGE:
      //
      // Allocate working buffer for RFC 4646 language in supported LanguageString.
      //
      Lang = AllocatePool (AsciiStrSize (mLanguageString));
      ASSERT (Lang != NULL);  

      Index = 0;
      LangCode = mLanguageString;
      while (*LangCode != 0) {
        GetNextLanguage (&LangCode, Lang);

        if (Index == Value->u8) {
          break;
        }

        Index++;
      }

      if (Index == Value->u8) {
        Status = gRT->SetVariable (
                        L"PlatformLang",
                        &gEfiGlobalVariableGuid,
                        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
                        AsciiStrSize (Lang),
                        Lang
                        );
        if (EFI_ERROR (Status)) {
          FreePool (Lang);
          return EFI_DEVICE_ERROR;
        }
      } else {
        ASSERT (FALSE);
      }
      FreePool (Lang);
      //
      //Current language of platform is changed,recreate oneof options for language.
      //
      InitializeLanguage();
      break;

    default:
      break;
    }
  }

  return EFI_SUCCESS;
}

/**
Update front page form base on the ClassGuid in the formset in other modules.

**/
VOID
UpdateFrontPageForm (
  VOID
  )
{
  EFI_STATUS                  Status;
  EFI_HII_HANDLE              HiiHandle;
  VOID                        *StartOpCodeHandle;
  VOID                        *EndOpCodeHandle;
  EFI_IFR_GUID_LABEL          *StartLabel;
  EFI_IFR_GUID_LABEL          *EndLabel;
  UINTN                       Index;
  EFI_STRING                  String;
  EFI_STRING_ID               Token;
  EFI_STRING_ID               TokenHelp;
  EFI_HII_HANDLE              *HiiHandles;
  EFI_GUID                    FormSetGuid;
  CHAR16                      *DevicePathStr;
  EFI_STRING_ID               DevicePathId;
  EFI_IFR_FORM_SET            *Buffer;
  UINTN                       BufferSize;
  UINT8                       ClassGuidNum;
  EFI_GUID                    *ClassGuid;
  UINTN                       TempSize;
  UINT8                       *Ptr;

  TempSize =0;
  BufferSize = 0;
  Buffer = NULL;

  HiiHandle = gFrontPagePrivate.HiiHandle;

  //
  // Allocate space for creation of UpdateData Buffer
  //
  StartOpCodeHandle = HiiAllocateOpCodeHandle ();
  ASSERT (StartOpCodeHandle != NULL);

  EndOpCodeHandle = HiiAllocateOpCodeHandle ();
  ASSERT (EndOpCodeHandle != NULL);
  //
  // Create Hii Extend Label OpCode as the start opcode
  //
  StartLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (StartOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
  StartLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
  StartLabel->Number       = LABEL_PLATFORM_INFORMATION;
  //
  // Create Hii Extend Label OpCode as the end opcode
  //
  EndLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (EndOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL));
  EndLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL;
  EndLabel->Number       = LABEL_END;

  //
  // Get all the Hii handles
  //
  HiiHandles = HiiGetHiiHandles (NULL);
  ASSERT (HiiHandles != NULL);
  //
  // Search for formset of each class type
  //
  for (Index = 0; HiiHandles[Index] != NULL; Index++) {
    Status = HiiGetFormSetFromHiiHandle(HiiHandles[Index], &Buffer,&BufferSize);
    if (EFI_ERROR (Status)) {
      continue;
    }

    Ptr = (UINT8 *)Buffer;
    while(TempSize < BufferSize)  {
      TempSize += ((EFI_IFR_OP_HEADER *) Ptr)->Length;

      if (((EFI_IFR_OP_HEADER *) Ptr)->Length <= OFFSET_OF (EFI_IFR_FORM_SET, Flags)){
        Ptr += ((EFI_IFR_OP_HEADER *) Ptr)->Length;
        continue;
      }

      //
      // Find Class Guid
      //
      ClassGuidNum = (UINT8) (((EFI_IFR_FORM_SET *)Ptr)->Flags & 0x3);
      ClassGuid = (EFI_GUID *) (VOID *)(Ptr + sizeof (EFI_IFR_FORM_SET));
      while (ClassGuidNum-- > 0) {
        if (CompareGuid (&gEfiIfrFrontPageGuid, ClassGuid) == 0){
          ClassGuid ++;
          continue;
        }

        String = HiiGetString (HiiHandles[Index], ((EFI_IFR_FORM_SET *)Ptr)->FormSetTitle, NULL);
        if (String == NULL) {
          String = HiiGetString (HiiHandle, STRING_TOKEN (STR_MISSING_STRING), NULL);
          ASSERT (String != NULL);
        }
        Token = HiiSetString (HiiHandle, 0, String, NULL);
        FreePool (String);

        String = HiiGetString (HiiHandles[Index], ((EFI_IFR_FORM_SET *)Ptr)->Help, NULL);

        if (String == NULL) {
          String = HiiGetString (HiiHandle, STRING_TOKEN (STR_MISSING_STRING), NULL);
          ASSERT (String != NULL);
        }
        TokenHelp = HiiSetString (HiiHandle, 0, String, NULL);
        FreePool (String);

        FormSetGuid = ((EFI_IFR_FORM_SET *)Ptr)->Guid;

        DevicePathStr = ExtractDevicePathFromHiiHandle(HiiHandles[Index]);
        DevicePathId  = 0;
        if (DevicePathStr != NULL){
          DevicePathId = HiiSetString (HiiHandle, 0, DevicePathStr, NULL);
          FreePool (DevicePathStr);
        }
        HiiCreateGotoExOpCode (
          StartOpCodeHandle,
          0,
          Token,
          TokenHelp,
          0,
          (EFI_QUESTION_ID) (Index + FRONT_PAGE_KEY_OFFSET),
          0,
          &FormSetGuid,
          DevicePathId
        );
        break;
      }
      Ptr += ((EFI_IFR_OP_HEADER *) Ptr)->Length;
    }

    FreePool(Buffer);
    Buffer = NULL;
    TempSize = 0;
    BufferSize = 0;
  }

  HiiUpdateForm (
    HiiHandle,
    &mFrontPageGuid,
    FRONT_PAGE_FORM_ID,
    StartOpCodeHandle,
    EndOpCodeHandle
    );

  HiiFreeOpCodeHandle (StartOpCodeHandle);
  HiiFreeOpCodeHandle (EndOpCodeHandle);
  FreePool (HiiHandles);
}

/**
  Initialize HII information for the FrontPage


  @retval  EFI_SUCCESS        The operation is successful.
  @retval  EFI_DEVICE_ERROR   If the dynamic opcode creation failed.

**/
EFI_STATUS
InitializeFrontPage (
  VOID
  )
{
  EFI_STATUS                  Status;
  //
  // Locate Hii relative protocols
  //
  Status = gBS->LocateProtocol (&gEfiFormBrowser2ProtocolGuid, NULL, (VOID **) &gFormBrowser2);
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Install Device Path Protocol and Config Access protocol to driver handle
  //
  gFrontPagePrivate.DriverHandle = NULL;
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &gFrontPagePrivate.DriverHandle,
                  &gEfiDevicePathProtocolGuid,
                  &mFrontPageHiiVendorDevicePath,
                  &gEfiHiiConfigAccessProtocolGuid,
                  &gFrontPagePrivate.ConfigAccess,
                  NULL
                  );
  ASSERT_EFI_ERROR (Status);

  //
  // Publish our HII data
  //
  gFrontPagePrivate.HiiHandle = HiiAddPackages (
                                  &mFrontPageGuid,
                                  gFrontPagePrivate.DriverHandle,
                                  FrontPageVfrBin,
                                  UiAppStrings,
                                  NULL
                                  );
  ASSERT (gFrontPagePrivate.HiiHandle != NULL);

  //
  //Updata Front Page strings
  //
  UpdateFrontPageStrings ();

  //
  // Initialize laguage options
  //
  InitializeLanguage ();

  //
  //Updata Front Page form
  //
  UpdateFrontPageForm();

  return Status;
}

/**
  Call the browser and display the front page

  @return   Status code that will be returned by
            EFI_FORM_BROWSER2_PROTOCOL.SendForm ().

**/
EFI_STATUS
CallFrontPage (
  VOID
  )
{
  EFI_STATUS                  Status;
  EFI_BROWSER_ACTION_REQUEST  ActionRequest;

  //
  // Begin waiting for USER INPUT
  //
  REPORT_STATUS_CODE (
    EFI_PROGRESS_CODE,
    (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_PC_INPUT_WAIT)
    );

  ActionRequest = EFI_BROWSER_ACTION_REQUEST_NONE;
  Status = gFormBrowser2->SendForm (
                            gFormBrowser2,
                            &gFrontPagePrivate.HiiHandle,
                            1,
                            &mFrontPageGuid,
                            0,
                            NULL,
                            &ActionRequest
                            );
  //
  // Check whether user change any option setting which needs a reset to be effective
  //
  if (ActionRequest == EFI_BROWSER_ACTION_REQUEST_RESET) {
    EnableResetRequired ();
  }

  return Status;
}

/**
  Remove the installed packages from the HiiDatabase.

**/
VOID
FreeFrontPage(
  VOID
  )
{
  EFI_STATUS                  Status;
  Status = gBS->UninstallMultipleProtocolInterfaces (
                  gFrontPagePrivate.DriverHandle,
                  &gEfiDevicePathProtocolGuid,
                  &mFrontPageHiiVendorDevicePath,
                  &gEfiHiiConfigAccessProtocolGuid,
                  &gFrontPagePrivate.ConfigAccess,
                  NULL
                  );
  ASSERT_EFI_ERROR (Status);

  //
  // Publish our HII data
  //
  HiiRemovePackages (gFrontPagePrivate.HiiHandle);
  if (gFrontPagePrivate.LanguageToken != NULL) {
    FreePool (gFrontPagePrivate.LanguageToken);
    gFrontPagePrivate.LanguageToken = NULL;
  }
}

/**
  Convert Processor Frequency Data to a string.

  @param ProcessorFrequency The frequency data to process
  @param Base10Exponent     The exponent based on 10
  @param String             The string that is created

**/
VOID
ConvertProcessorToString (
  IN  UINT16                               ProcessorFrequency,
  IN  UINT16                               Base10Exponent,
  OUT CHAR16                               **String
  )
{
  CHAR16  *StringBuffer;
  UINTN   Index;
  UINTN   DestMax;
  UINT32  FreqMhz;

  if (Base10Exponent >= 6) {
    FreqMhz = ProcessorFrequency;
    for (Index = 0; Index < (UINTN) (Base10Exponent - 6); Index++) {
      FreqMhz *= 10;
    }
  } else {
    FreqMhz = 0;
  }
  DestMax = 0x20 / sizeof (CHAR16);
  StringBuffer = AllocateZeroPool (0x20);
  ASSERT (StringBuffer != NULL);
  Index = UnicodeValueToString (StringBuffer, LEFT_JUSTIFY, FreqMhz / 1000, 3);
  StrCatS (StringBuffer, DestMax, L".");
  UnicodeValueToString (StringBuffer + Index + 1, PREFIX_ZERO, (FreqMhz % 1000) / 10, 2);
  StrCatS (StringBuffer, DestMax, L" GHz");
  *String = (CHAR16 *) StringBuffer;
  return ;
}


/**
  Convert Memory Size to a string.

  @param MemorySize      The size of the memory to process
  @param String          The string that is created

**/
VOID
ConvertMemorySizeToString (
  IN  UINT32          MemorySize,
  OUT CHAR16          **String
  )
{
  CHAR16  *StringBuffer;

  StringBuffer = AllocateZeroPool (0x24);
  ASSERT (StringBuffer != NULL);
  UnicodeValueToString (StringBuffer, LEFT_JUSTIFY, MemorySize, 10);
  StrCatS (StringBuffer, 0x24 / sizeof (CHAR16), L" MB RAM");

  *String = (CHAR16 *) StringBuffer;

  return ;
}

/**

  Acquire the string associated with the Index from smbios structure and return it.
  The caller is responsible for free the string buffer.

  @param    OptionalStrStart  The start position to search the string
  @param    Index             The index of the string to extract
  @param    String            The string that is extracted

  @retval   EFI_SUCCESS       The function returns EFI_SUCCESS always.

**/
EFI_STATUS
GetOptionalStringByIndex (
  IN      CHAR8                   *OptionalStrStart,
  IN      UINT8                   Index,
  OUT     CHAR16                  **String
  )
{
  UINTN          StrSize;

  if (Index == 0) {
    *String = AllocateZeroPool (sizeof (CHAR16));
    return EFI_SUCCESS;
  }

  StrSize = 0;
  do {
    Index--;
    OptionalStrStart += StrSize;
    StrSize           = AsciiStrSize (OptionalStrStart);
  } while (OptionalStrStart[StrSize] != 0 && Index != 0);

  if ((Index != 0) || (StrSize == 1)) {
    //
    // Meet the end of strings set but Index is non-zero, or
    // Find an empty string
    //
    *String = GetStringById (STRING_TOKEN (STR_MISSING_STRING));
  } else {
    *String = AllocatePool (StrSize * sizeof (CHAR16));
    AsciiStrToUnicodeStr (OptionalStrStart, *String);
  }

  return EFI_SUCCESS;
}


/**
  Update the banner information for the Front Page based on Smbios information.
**/
VOID
UpdateFrontPageStrings (
  VOID
  )
{
  UINT8                             StrIndex;
  CHAR16                            *NewString;
  CHAR16                            *FirmwareVersionString;
  EFI_STATUS                        Status;
  EFI_STRING_ID                     TokenToUpdate;
  EFI_SMBIOS_HANDLE                 SmbiosHandle;
  EFI_SMBIOS_PROTOCOL               *Smbios;
  SMBIOS_TABLE_TYPE0                *Type0Record;
  SMBIOS_TABLE_TYPE1                *Type1Record;
  SMBIOS_TABLE_TYPE4                *Type4Record;
  SMBIOS_TABLE_TYPE19               *Type19Record;
  EFI_SMBIOS_TABLE_HEADER           *Record;
  UINT64                            InstalledMemory;
  BOOLEAN                           FoundCpu;

  InstalledMemory = 0;
  FoundCpu = 0;

  //
  // Update Front Page strings
  //
  Status = gBS->LocateProtocol (
                  &gEfiSmbiosProtocolGuid,
                  NULL,
                  (VOID **) &Smbios
                  );
  if (!EFI_ERROR (Status)) {
    SmbiosHandle = SMBIOS_HANDLE_PI_RESERVED;
    Status = Smbios->GetNext (Smbios, &SmbiosHandle, NULL, &Record, NULL);
    while (!EFI_ERROR(Status)) {
      if (Record->Type == EFI_SMBIOS_TYPE_BIOS_INFORMATION) {
        Type0Record = (SMBIOS_TABLE_TYPE0 *) Record;
        StrIndex = Type0Record->BiosVersion;
        GetOptionalStringByIndex ((CHAR8*)((UINT8*)Type0Record + Type0Record->Hdr.Length), StrIndex, &NewString);
        TokenToUpdate = STRING_TOKEN (STR_FRONT_PAGE_BIOS_VERSION);
        FirmwareVersionString = (CHAR16 *) PcdGetPtr (PcdFirmwareVersionString);
        if (*FirmwareVersionString != 0x0000 ) {
          FreePool (NewString);
          NewString = (CHAR16 *) PcdGetPtr (PcdFirmwareVersionString);
          HiiSetString (gFrontPagePrivate.HiiHandle, TokenToUpdate, NewString, NULL);
        } else {
          HiiSetString (gFrontPagePrivate.HiiHandle, TokenToUpdate, NewString, NULL);
          FreePool (NewString);
        }
      }

      if (Record->Type == EFI_SMBIOS_TYPE_SYSTEM_INFORMATION) {
        Type1Record = (SMBIOS_TABLE_TYPE1 *) Record;
        StrIndex = Type1Record->ProductName;
        GetOptionalStringByIndex ((CHAR8*)((UINT8*)Type1Record + Type1Record->Hdr.Length), StrIndex, &NewString);
        TokenToUpdate = STRING_TOKEN (STR_FRONT_PAGE_COMPUTER_MODEL);
        HiiSetString (gFrontPagePrivate.HiiHandle, TokenToUpdate, NewString, NULL);
        FreePool (NewString);
      }

      if ((Record->Type == EFI_SMBIOS_TYPE_PROCESSOR_INFORMATION) && !FoundCpu) {
        Type4Record = (SMBIOS_TABLE_TYPE4 *) Record;
        //
        // The information in the record should be only valid when the CPU Socket is populated.
        //
        if ((Type4Record->Status & SMBIOS_TYPE4_CPU_SOCKET_POPULATED) == SMBIOS_TYPE4_CPU_SOCKET_POPULATED) {
          StrIndex = Type4Record->ProcessorVersion;
          GetOptionalStringByIndex ((CHAR8*)((UINT8*)Type4Record + Type4Record->Hdr.Length), StrIndex, &NewString);
          TokenToUpdate = STRING_TOKEN (STR_FRONT_PAGE_CPU_MODEL);
          HiiSetString (gFrontPagePrivate.HiiHandle, TokenToUpdate, NewString, NULL);
          FreePool (NewString);

          ConvertProcessorToString(Type4Record->CurrentSpeed, 6, &NewString);
          TokenToUpdate = STRING_TOKEN (STR_FRONT_PAGE_CPU_SPEED);
          HiiSetString (gFrontPagePrivate.HiiHandle, TokenToUpdate, NewString, NULL);
          FreePool (NewString);

          FoundCpu = TRUE;
        }
      }

      if ( Record->Type == EFI_SMBIOS_TYPE_MEMORY_ARRAY_MAPPED_ADDRESS ) {
        Type19Record = (SMBIOS_TABLE_TYPE19 *) Record;
        if (Type19Record->StartingAddress != 0xFFFFFFFF ) {
          InstalledMemory += RShiftU64(Type19Record->EndingAddress -
                                       Type19Record->StartingAddress + 1, 10);
        } else {
          InstalledMemory += RShiftU64(Type19Record->ExtendedEndingAddress -
                                       Type19Record->ExtendedStartingAddress + 1, 20);
        }
      }

      Status = Smbios->GetNext (Smbios, &SmbiosHandle, NULL, &Record, NULL);
    }

    // now update the total installed RAM size
    ConvertMemorySizeToString ((UINT32)InstalledMemory, &NewString );
    TokenToUpdate = STRING_TOKEN (STR_FRONT_PAGE_MEMORY_SIZE);
    HiiSetString (gFrontPagePrivate.HiiHandle, TokenToUpdate, NewString, NULL);
    FreePool (NewString);
  }

  return ;
}

/**
  This function will change video resolution and text mode
  according to defined setup mode or defined boot mode  

  @param  IsSetupMode   Indicate mode is changed to setup mode or boot mode. 

  @retval  EFI_SUCCESS  Mode is changed successfully.
  @retval  Others             Mode failed to be changed.

**/
EFI_STATUS
EFIAPI
BdsSetConsoleMode (
  BOOLEAN  IsSetupMode
  )
{
  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;
  UINT32                                NewHorizontalResolution;
  UINT32                                NewVerticalResolution;
  UINT32                                NewColumns;
  UINT32                                NewRows;
  UINTN                                 HandleCount;
  EFI_HANDLE                            *HandleBuffer;
  EFI_STATUS                            Status;
  UINTN                                 Index;
  UINTN                                 CurrentColumn;
  UINTN                                 CurrentRow;  

  MaxGopMode  = 0;
  MaxTextMode = 0;

  //
  // Get current video resolution and text mode 
  //
  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;
  }

  if (IsSetupMode) {
    //
    // The requried resolution and text mode is setup mode.
    //
    NewHorizontalResolution = mSetupHorizontalResolution;
    NewVerticalResolution   = mSetupVerticalResolution;
    NewColumns              = mSetupTextModeColumn;
    NewRows                 = mSetupTextModeRow;
  } else {
    //
    // The required resolution and text mode is boot mode.
    //
    NewHorizontalResolution = mBootHorizontalResolution;
    NewVerticalResolution   = mBootVerticalResolution;
    NewColumns              = mBootTextModeColumn;
    NewRows                 = mBootTextModeRow;   
  }
  
  if (GraphicsOutput != NULL) {
    MaxGopMode  = GraphicsOutput->Mode->MaxMode;
  } 

  if (SimpleTextOut != NULL) {
    MaxTextMode = SimpleTextOut->Mode->MaxMode;
  }

  //
  // 1. If current video resolution is same with required video resolution,
  //    video resolution need not be changed.
  //    1.1. If current text mode is same with required text mode, text mode need not be changed.
  //    1.2. If current text mode is different from required text mode, text mode need be changed.
  // 2. If current video resolution is different from required 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 == NewHorizontalResolution) &&
          (Info->VerticalResolution == NewVerticalResolution)) {
        if ((GraphicsOutput->Mode->Info->HorizontalResolution == NewHorizontalResolution) &&
            (GraphicsOutput->Mode->Info->VerticalResolution == NewVerticalResolution)) {
          //
          // Current resolution is same with required resolution, check if text mode need be set
          //
          Status = SimpleTextOut->QueryMode (SimpleTextOut, SimpleTextOut->Mode->Mode, &CurrentColumn, &CurrentRow);
          ASSERT_EFI_ERROR (Status);
          if (CurrentColumn == NewColumns && CurrentRow == NewRows) {
            //
            // If current text mode is same with required text mode. Do nothing
            //
            FreePool (Info);
            return EFI_SUCCESS;
          } else {
            //
            // If current text mode is different from requried text mode.  Set new video mode
            //
            for (Index = 0; Index < MaxTextMode; Index++) {
              Status = SimpleTextOut->QueryMode (SimpleTextOut, Index, &CurrentColumn, &CurrentRow);
              if (!EFI_ERROR(Status)) {
                if ((CurrentColumn == NewColumns) && (CurrentRow == NewRows)) {
                  //
                  // Required text mode is supported, set it.
                  //
                  Status = SimpleTextOut->SetMode (SimpleTextOut, Index);
                  ASSERT_EFI_ERROR (Status);
                  //
                  // Update text mode PCD.
                  //
                  Status = PcdSet32S (PcdConOutColumn, mSetupTextModeColumn);
                  ASSERT_EFI_ERROR (Status);
                  Status = PcdSet32S (PcdConOutRow, mSetupTextModeRow);
                  ASSERT_EFI_ERROR (Status);
                  FreePool (Info);
                  return EFI_SUCCESS;
                }
              }
            }
            if (Index == MaxTextMode) {
              //
              // If requried text mode is not supported, return error.
              //
              FreePool (Info);
              return EFI_UNSUPPORTED;
            }
          }
        } else {
          //
          // 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)) {
            FreePool (Info);
            break;
          }
        }
      }
      FreePool (Info);
    }
  }

  if (ModeNumber == MaxGopMode) {
    //
    // If the resolution is not supported, return error.
    //
    return EFI_UNSUPPORTED;
  }

  //
  // Set PCD to Inform GraphicsConsole to change video resolution.
  // Set PCD to Inform Consplitter to change text mode.
  //
  Status = PcdSet32S (PcdVideoHorizontalResolution, NewHorizontalResolution);
  ASSERT_EFI_ERROR (Status);
  Status = PcdSet32S (PcdVideoVerticalResolution, NewVerticalResolution);
  ASSERT_EFI_ERROR (Status);
  Status = PcdSet32S (PcdConOutColumn, NewColumns);
  ASSERT_EFI_ERROR (Status);
  Status = PcdSet32S (PcdConOutRow, NewRows);
  ASSERT_EFI_ERROR (Status);
  
  
  //
  // Video mode is changed, so restart graphics console driver and higher level driver.
  // Reconnect graphics console driver and higher level driver.
  // Locate all the handles with GOP protocol and reconnect it.
  //
  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);
    }
  }

  return EFI_SUCCESS;
}

/**
  The user Entry Point for Application. The user code starts with this function
  as the real entry point for the image goes into a library that calls this 
  function.

  @param[in] ImageHandle    The firmware allocated handle for the EFI image.  
  @param[in] SystemTable    A pointer to the EFI System Table.
  
  @retval EFI_SUCCESS       The entry point is executed successfully.
  @retval other             Some error occurs when executing this entry point.

**/
EFI_STATUS
EFIAPI
InitializeUserInterface (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_HII_HANDLE                     HiiHandle;
  EFI_STATUS                         Status;
  EFI_GRAPHICS_OUTPUT_PROTOCOL       *GraphicsOutput;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL    *SimpleTextOut;
  UINTN                              BootTextColumn;
  UINTN                              BootTextRow;

  if (!mModeInitialized) {
    //
    // After the console is ready, get current video resolution 
    // and text mode before launching setup at first time.
    //
    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) {
      //
      // Get current video resolution and text mode.
      //
      mBootHorizontalResolution = GraphicsOutput->Mode->Info->HorizontalResolution;
      mBootVerticalResolution   = GraphicsOutput->Mode->Info->VerticalResolution;
    }

    if (SimpleTextOut != NULL) {
      Status = SimpleTextOut->QueryMode (
                                SimpleTextOut,
                                SimpleTextOut->Mode->Mode,
                                &BootTextColumn,
                                &BootTextRow
                                );
      mBootTextModeColumn = (UINT32)BootTextColumn;
      mBootTextModeRow    = (UINT32)BootTextRow;
    }

    //
    // Get user defined text mode for setup.
    //  
    mSetupHorizontalResolution = PcdGet32 (PcdSetupVideoHorizontalResolution);
    mSetupVerticalResolution   = PcdGet32 (PcdSetupVideoVerticalResolution);      
    mSetupTextModeColumn       = PcdGet32 (PcdSetupConOutColumn);
    mSetupTextModeRow          = PcdGet32 (PcdSetupConOutRow);

    mModeInitialized           = TRUE;
  }

  gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);
  gST->ConOut->ClearScreen (gST->ConOut);
  
  //
  // Install customized fonts needed by Front Page
  //
  
  HiiHandle = ExportFonts ();
  ASSERT (HiiHandle != NULL);

  InitializeStringSupport ();

  BdsSetConsoleMode (TRUE);
  UiEntry (FALSE);
  BdsSetConsoleMode (FALSE);

  UninitializeStringSupport ();
  HiiRemovePackages (HiiHandle);

  return EFI_SUCCESS;
}

/**
  This function is the main entry of the UI entry.
  The function will present the main menu of the system UI.

  @param ConnectAllHappened Caller passes the value to UI to avoid unnecessary connect-all.

**/
VOID
EFIAPI
UiEntry (
  IN BOOLEAN                      ConnectAllHappened
  )
{
  EFI_STATUS                    Status;
  EFI_BOOT_LOGO_PROTOCOL        *BootLogo;

  //
  // Indicate if the connect all has been performed before.
  //
  if (ConnectAllHappened) {
    gConnectAllHappened = TRUE;
  }

  //
  // The boot option enumeration time is acceptable in Ui driver
  //
  EfiBootManagerRefreshAllBootOption ();

  //
  // Boot Logo is corrupted, report it using Boot Logo protocol.
  //
  Status = gBS->LocateProtocol (&gEfiBootLogoProtocolGuid, NULL, (VOID **) &BootLogo);
  if (!EFI_ERROR (Status) && (BootLogo != NULL)) {
    BootLogo->SetBootLogo (BootLogo, NULL, 0, 0, 0, 0);
  }

  InitializeFrontPage ();

  CallFrontPage ();

  FreeFrontPage ();

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

  //
  //Will leave browser, check any reset required change is applied? if yes, reset system
  //
  SetupResetReminder ();
}

/**
  Extract device path for given HII handle and class guid.

  @param Handle          The HII handle.

  @retval  NULL          Fail to get the device path string.
  @return  PathString    Get the device path string.

**/
CHAR16 *
ExtractDevicePathFromHiiHandle (
  IN      EFI_HII_HANDLE      Handle
  )
{
  EFI_STATUS                       Status;
  EFI_HANDLE                       DriverHandle;
  
  ASSERT (Handle != NULL);

  if (Handle == NULL) {
    return NULL;
  }

  Status = gHiiDatabase->GetPackageListHandle (gHiiDatabase, Handle, &DriverHandle);
  if (EFI_ERROR (Status)) {
    return NULL;
  }

 return ConvertDevicePathToText(DevicePathFromHandle (DriverHandle), FALSE, FALSE);

}

//
//  Following are BDS Lib functions which contain all the code about setup browser reset reminder feature.
//  Setup Browser reset reminder feature is that an reset reminder will be given before user leaves the setup browser  if
//  user change any option setting which needs a reset to be effective, and  the reset will be applied according to  the user selection.
//


/**
  Enable the setup browser reset reminder feature.
  This routine is used in platform tip. If the platform policy need the feature, use the routine to enable it.

**/
VOID
EFIAPI
EnableResetReminderFeature (
  VOID
  )
{
  mFeaturerSwitch = TRUE;
}


/**
  Disable the setup browser reset reminder feature.
  This routine is used in platform tip. If the platform policy do not want the feature, use the routine to disable it.

**/
VOID
EFIAPI
DisableResetReminderFeature (
  VOID
  )
{
  mFeaturerSwitch = FALSE;
}


/**
  Record the info that  a reset is required.
  A  module boolean variable is used to record whether a reset is required.

**/
VOID
EFIAPI
EnableResetRequired (
  VOID
  )
{
  mResetRequired = TRUE;
}


/**
  Record the info that  no reset is required.
  A  module boolean variable is used to record whether a reset is required.

**/
VOID
EFIAPI
DisableResetRequired (
  VOID
  )
{
  mResetRequired = FALSE;
}


/**
  Check whether platform policy enable the reset reminder feature. The default is enabled.

**/
BOOLEAN
EFIAPI
IsResetReminderFeatureEnable (
  VOID
  )
{
  return mFeaturerSwitch;
}


/**
  Check if  user changed any option setting which needs a system reset to be effective.

**/
BOOLEAN
EFIAPI
IsResetRequired (
  VOID
  )
{
  return mResetRequired;
}


/**
  Check whether a reset is needed, and finish the reset reminder feature.
  If a reset is needed, Popup a menu to notice user, and finish the feature
  according to the user selection.

**/
VOID
EFIAPI
SetupResetReminder (
  VOID
  )
{
  EFI_INPUT_KEY                 Key;
  CHAR16                        *StringBuffer1;
  CHAR16                        *StringBuffer2;


  //
  //check any reset required change is applied? if yes, reset system
  //
  if (IsResetReminderFeatureEnable ()) {
    if (IsResetRequired ()) {

      StringBuffer1 = AllocateZeroPool (MAX_STRING_LEN * sizeof (CHAR16));
      ASSERT (StringBuffer1 != NULL);
      StringBuffer2 = AllocateZeroPool (MAX_STRING_LEN * sizeof (CHAR16));
      ASSERT (StringBuffer2 != NULL);
      StrCpyS (StringBuffer1, MAX_STRING_LEN, L"Configuration changed. Reset to apply it Now.");
      StrCpyS (StringBuffer2, MAX_STRING_LEN, 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);
    }
  }
}