Renormalized end-of-lines from master@27b044605cd5f6b33a3d231576003850b3fe305btrunk

1 files changed, 2304 insertions, 2304 deletions

diff --git a/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c b/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
index 003cb499b5..dced92f54c 100644
--- a/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
+++ b/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c
@@ -1,2304 +1,2304 @@
-/** @file

-This is an example of how a driver might export data to the HII protocol to be

-later utilized by the Setup Protocol

-

-Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>

-SPDX-License-Identifier: BSD-2-Clause-Patent

-

-**/

-

-#include "DriverSample.h"

-

-#define DISPLAY_ONLY_MY_ITEM  0x0002

-

-CHAR16  VariableName[]  = L"MyIfrNVData";

-CHAR16  MyEfiVar[]      = L"MyEfiVar";

-CHAR16  MyEfiBitVar[]   = L"MyEfiBitVar";

-CHAR16  MyEfiUnionVar[] = L"MyEfiUnionVar";

-

-EFI_HANDLE                  DriverHandle[2] = { NULL, NULL };

-DRIVER_SAMPLE_PRIVATE_DATA  *mPrivateData   = NULL;

-EFI_EVENT                   mEvent;

-

-HII_VENDOR_DEVICE_PATH  mHiiVendorDevicePath0 = {

-  {

-    {

-      HARDWARE_DEVICE_PATH,

-      HW_VENDOR_DP,

-      {

-        (UINT8)(sizeof (VENDOR_DEVICE_PATH)),

-        (UINT8)((sizeof (VENDOR_DEVICE_PATH)) >> 8)

-      }

-    },

-    DRIVER_SAMPLE_FORMSET_GUID

-  },

-  {

-    END_DEVICE_PATH_TYPE,

-    END_ENTIRE_DEVICE_PATH_SUBTYPE,

-    {

-      (UINT8)(END_DEVICE_PATH_LENGTH),

-      (UINT8)((END_DEVICE_PATH_LENGTH) >> 8)

-    }

-  }

-};

-

-HII_VENDOR_DEVICE_PATH  mHiiVendorDevicePath1 = {

-  {

-    {

-      HARDWARE_DEVICE_PATH,

-      HW_VENDOR_DP,

-      {

-        (UINT8)(sizeof (VENDOR_DEVICE_PATH)),

-        (UINT8)((sizeof (VENDOR_DEVICE_PATH)) >> 8)

-      }

-    },

-    DRIVER_SAMPLE_INVENTORY_GUID

-  },

-  {

-    END_DEVICE_PATH_TYPE,

-    END_ENTIRE_DEVICE_PATH_SUBTYPE,

-    {

-      (UINT8)(END_DEVICE_PATH_LENGTH),

-      (UINT8)((END_DEVICE_PATH_LENGTH) >> 8)

-    }

-  }

-};

-

-/**

-  Set value of a data element in an Array by its Index.

-

-  @param  Array                  The data array.

-  @param  Type                   Type of the data in this array.

-  @param  Index                  Zero based index for data in this array.

-  @param  Value                  The value to be set.

-

-**/

-VOID

-SetArrayData (

-  IN VOID    *Array,

-  IN UINT8   Type,

-  IN UINTN   Index,

-  IN UINT64  Value

-  )

-{

-  ASSERT (Array != NULL);

-

-  switch (Type) {

-    case EFI_IFR_TYPE_NUM_SIZE_8:

-      *(((UINT8 *)Array) + Index) = (UINT8)Value;

-      break;

-

-    case EFI_IFR_TYPE_NUM_SIZE_16:

-      *(((UINT16 *)Array) + Index) = (UINT16)Value;

-      break;

-

-    case EFI_IFR_TYPE_NUM_SIZE_32:

-      *(((UINT32 *)Array) + Index) = (UINT32)Value;

-      break;

-

-    case EFI_IFR_TYPE_NUM_SIZE_64:

-      *(((UINT64 *)Array) + Index) = (UINT64)Value;

-      break;

-

-    default:

-      break;

-  }

-}

-

-/**

-  Notification function for keystrokes.

-

-  @param[in] KeyData    The key that was pressed.

-

-  @retval EFI_SUCCESS   The operation was successful.

-**/

-EFI_STATUS

-EFIAPI

-NotificationFunction (

-  IN EFI_KEY_DATA  *KeyData

-  )

-{

-  gBS->SignalEvent (mEvent);

-

-  return EFI_SUCCESS;

-}

-

-/**

-  Function to start monitoring for CTRL-C using SimpleTextInputEx.

-

-  @retval EFI_SUCCESS           The feature is enabled.

-  @retval EFI_OUT_OF_RESOURCES  There is not enough mnemory available.

-**/

-EFI_STATUS

-EFIAPI

-InternalStartMonitor (

-  VOID

-  )

-{

-  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *SimpleEx;

-  EFI_KEY_DATA                       KeyData;

-  EFI_STATUS                         Status;

-  EFI_HANDLE                         *Handles;

-  UINTN                              HandleCount;

-  UINTN                              HandleIndex;

-  VOID                               *NotifyHandle;

-

-  Status = gBS->LocateHandleBuffer (

-                  ByProtocol,

-                  &gEfiSimpleTextInputExProtocolGuid,

-                  NULL,

-                  &HandleCount,

-                  &Handles

-                  );

-  for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {

-    Status = gBS->HandleProtocol (Handles[HandleIndex], &gEfiSimpleTextInputExProtocolGuid, (VOID **)&SimpleEx);

-    ASSERT_EFI_ERROR (Status);

-

-    KeyData.KeyState.KeyToggleState = 0;

-    KeyData.Key.ScanCode            = 0;

-    KeyData.KeyState.KeyShiftState  = EFI_SHIFT_STATE_VALID|EFI_LEFT_CONTROL_PRESSED;

-    KeyData.Key.UnicodeChar         = L'c';

-

-    Status = SimpleEx->RegisterKeyNotify (

-                         SimpleEx,

-                         &KeyData,

-                         NotificationFunction,

-                         &NotifyHandle

-                         );

-    if (EFI_ERROR (Status)) {

-      break;

-    }

-

-    KeyData.KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID|EFI_RIGHT_CONTROL_PRESSED;

-    Status                         = SimpleEx->RegisterKeyNotify (

-                                                 SimpleEx,

-                                                 &KeyData,

-                                                 NotificationFunction,

-                                                 &NotifyHandle

-                                                 );

-    if (EFI_ERROR (Status)) {

-      break;

-    }

-  }

-

-  return EFI_SUCCESS;

-}

-

-/**

-  Function to stop monitoring for CTRL-C using SimpleTextInputEx.

-

-  @retval EFI_SUCCESS           The feature is enabled.

-  @retval EFI_OUT_OF_RESOURCES  There is not enough mnemory available.

-**/

-EFI_STATUS

-EFIAPI

-InternalStopMonitor (

-  VOID

-  )

-{

-  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *SimpleEx;

-  EFI_STATUS                         Status;

-  EFI_HANDLE                         *Handles;

-  EFI_KEY_DATA                       KeyData;

-  UINTN                              HandleCount;

-  UINTN                              HandleIndex;

-  VOID                               *NotifyHandle;

-

-  Status = gBS->LocateHandleBuffer (

-                  ByProtocol,

-                  &gEfiSimpleTextInputExProtocolGuid,

-                  NULL,

-                  &HandleCount,

-                  &Handles

-                  );

-  for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {

-    Status = gBS->HandleProtocol (Handles[HandleIndex], &gEfiSimpleTextInputExProtocolGuid, (VOID **)&SimpleEx);

-    ASSERT_EFI_ERROR (Status);

-

-    KeyData.KeyState.KeyToggleState = 0;

-    KeyData.Key.ScanCode            = 0;

-    KeyData.KeyState.KeyShiftState  = EFI_SHIFT_STATE_VALID|EFI_LEFT_CONTROL_PRESSED;

-    KeyData.Key.UnicodeChar         = L'c';

-

-    Status = SimpleEx->RegisterKeyNotify (

-                         SimpleEx,

-                         &KeyData,

-                         NotificationFunction,

-                         &NotifyHandle

-                         );

-    if (!EFI_ERROR (Status)) {

-      Status = SimpleEx->UnregisterKeyNotify (SimpleEx, NotifyHandle);

-    }

-

-    KeyData.KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID|EFI_RIGHT_CONTROL_PRESSED;

-    Status                         = SimpleEx->RegisterKeyNotify (

-                                                 SimpleEx,

-                                                 &KeyData,

-                                                 NotificationFunction,

-                                                 &NotifyHandle

-                                                 );

-    if (!EFI_ERROR (Status)) {

-      Status = SimpleEx->UnregisterKeyNotify (SimpleEx, NotifyHandle);

-    }

-  }

-

-  return EFI_SUCCESS;

-}

-

-/**

- Update names of Name/Value storage to current language.

-

- @param PrivateData   Points to the driver private data.

-

- @retval EFI_SUCCESS   All names are successfully updated.

- @retval EFI_NOT_FOUND Failed to get Name from HII database.

-

-**/

-EFI_STATUS

-LoadNameValueNames (

-  IN DRIVER_SAMPLE_PRIVATE_DATA  *PrivateData

-  )

-{

-  UINTN  Index;

-

-  //

-  // Get Name/Value name string of current language

-  //

-  for (Index = 0; Index < NAME_VALUE_NAME_NUMBER; Index++) {

-    PrivateData->NameValueName[Index] = HiiGetString (

-                                          PrivateData->HiiHandle[0],

-                                          PrivateData->NameStringId[Index],

-                                          NULL

-                                          );

-    if (PrivateData->NameValueName[Index] == NULL) {

-      return EFI_NOT_FOUND;

-    }

-  }

-

-  return EFI_SUCCESS;

-}

-

-/**

-  Get the value of <Number> in <BlockConfig> format, i.e. the value of OFFSET

-  or WIDTH or VALUE.

-  <BlockConfig> ::= 'OFFSET='<Number>&'WIDTH='<Number>&'VALUE'=<Number>

-

-  This is a internal function.

-

-  @param  StringPtr              String in <BlockConfig> format and points to the

-                                 first character of <Number>.

-  @param  Number                 The output value. Caller takes the responsibility

-                                 to free memory.

-  @param  Len                    Length of the <Number>, in characters.

-

-  @retval EFI_OUT_OF_RESOURCES   Insufficient resources to store neccessary

-                                 structures.

-  @retval EFI_SUCCESS            Value of <Number> is outputted in Number

-                                 successfully.

-

-**/

-EFI_STATUS

-GetValueOfNumber (

-  IN EFI_STRING  StringPtr,

-  OUT UINT8      **Number,

-  OUT UINTN      *Len

-  )

-{

-  EFI_STRING  TmpPtr;

-  UINTN       Length;

-  EFI_STRING  Str;

-  UINT8       *Buf;

-  EFI_STATUS  Status;

-  UINT8       DigitUint8;

-  UINTN       Index;

-  CHAR16      TemStr[2];

-

-  if ((StringPtr == NULL) || (*StringPtr == L'\0') || (Number == NULL) || (Len == NULL)) {

-    return EFI_INVALID_PARAMETER;

-  }

-

-  Buf = NULL;

-

-  TmpPtr = StringPtr;

-  while (*StringPtr != L'\0' && *StringPtr != L'&') {

-    StringPtr++;

-  }

-

-  *Len   = StringPtr - TmpPtr;

-  Length = *Len + 1;

-

-  Str = (EFI_STRING)AllocateZeroPool (Length * sizeof (CHAR16));

-  if (Str == NULL) {

-    Status = EFI_OUT_OF_RESOURCES;

-    goto Exit;

-  }

-

-  CopyMem (Str, TmpPtr, *Len * sizeof (CHAR16));

-  *(Str + *Len) = L'\0';

-

-  Length = (Length + 1) / 2;

-  Buf    = (UINT8 *)AllocateZeroPool (Length);

-  if (Buf == NULL) {

-    Status = EFI_OUT_OF_RESOURCES;

-    goto Exit;

-  }

-

-  Length = *Len;

-  ZeroMem (TemStr, sizeof (TemStr));

-  for (Index = 0; Index < Length; Index++) {

-    TemStr[0]  = Str[Length - Index - 1];

-    DigitUint8 = (UINT8)StrHexToUint64 (TemStr);

-    if ((Index & 1) == 0) {

-      Buf[Index/2] = DigitUint8;

-    } else {

-      Buf[Index/2] = (UINT8)((DigitUint8 << 4) + Buf[Index/2]);

-    }

-  }

-

-  *Number = Buf;

-  Status  = EFI_SUCCESS;

-

-Exit:

-  if (Str != NULL) {

-    FreePool (Str);

-  }

-

-  return Status;

-}

-

-/**

-  Create altcfg string.

-

-  @param  Result               The request result string.

-  @param  ConfigHdr            The request head info. <ConfigHdr> format.

-  @param  Offset               The offset of the parameter int he structure.

-  @param  Width                The width of the parameter.

-

-

-  @retval  The string with altcfg info append at the end.

-**/

-EFI_STRING

-CreateAltCfgString (

-  IN     EFI_STRING  Result,

-  IN     EFI_STRING  ConfigHdr,

-  IN     UINTN       Offset,

-  IN     UINTN       Width

-  )

-{

-  EFI_STRING  StringPtr;

-  EFI_STRING  TmpStr;

-  UINTN       NewLen;

-

-  NewLen = StrLen (Result);

-  //

-  // String Len = ConfigResp + AltConfig + AltConfig + 1("\0")

-  //

-  NewLen    = (NewLen + ((1 + StrLen (ConfigHdr) + 8 + 4) + (8 + 4 + 7 + 4 + 7 + 4)) * 2 + 1) * sizeof (CHAR16);

-  StringPtr = AllocateZeroPool (NewLen);

-  if (StringPtr == NULL) {

-    return NULL;

-  }

-

-  TmpStr = StringPtr;

-  if (Result != NULL) {

-    StrCpyS (StringPtr, NewLen / sizeof (CHAR16), Result);

-    StringPtr += StrLen (Result);

-    FreePool (Result);

-  }

-

-  UnicodeSPrint (

-    StringPtr,

-    (1 + StrLen (ConfigHdr) + 8 + 4 + 1) * sizeof (CHAR16),

-    L"&%s&ALTCFG=%04x",

-    ConfigHdr,

-    EFI_HII_DEFAULT_CLASS_STANDARD

-    );

-  StringPtr += StrLen (StringPtr);

-

-  UnicodeSPrint (

-    StringPtr,

-    (8 + 4 + 7 + 4 + 7 + 4 + 1) * sizeof (CHAR16),

-    L"&OFFSET=%04x&WIDTH=%04x&VALUE=%04x",

-    Offset,

-    Width,

-    DEFAULT_CLASS_STANDARD_VALUE

-    );

-  StringPtr += StrLen (StringPtr);

-

-  UnicodeSPrint (

-    StringPtr,

-    (1 + StrLen (ConfigHdr) + 8 + 4 + 1) * sizeof (CHAR16),

-    L"&%s&ALTCFG=%04x",

-    ConfigHdr,

-    EFI_HII_DEFAULT_CLASS_MANUFACTURING

-    );

-  StringPtr += StrLen (StringPtr);

-

-  UnicodeSPrint (

-    StringPtr,

-    (8 + 4 + 7 + 4 + 7 + 4 + 1) * sizeof (CHAR16),

-    L"&OFFSET=%04x&WIDTH=%04x&VALUE=%04x",

-    Offset,

-    Width,

-    DEFAULT_CLASS_MANUFACTURING_VALUE

-    );

-  StringPtr += StrLen (StringPtr);

-

-  return TmpStr;

-}

-

-/**

-  Check whether need to add the altcfg string. if need to add, add the altcfg

-  string.

-

-  @param  RequestResult              The request result string.

-  @param  ConfigRequestHdr           The request head info. <ConfigHdr> format.

-

-**/

-VOID

-AppendAltCfgString (

-  IN OUT EFI_STRING  *RequestResult,

-  IN     EFI_STRING  ConfigRequestHdr

-  )

-{

-  EFI_STRING  StringPtr;

-  UINTN       Length;

-  UINT8       *TmpBuffer;

-  UINTN       Offset;

-  UINTN       Width;

-  UINTN       BlockSize;

-  UINTN       ValueOffset;

-  UINTN       ValueWidth;

-  EFI_STATUS  Status;

-

-  TmpBuffer   = NULL;

-  StringPtr   = *RequestResult;

-  StringPtr   = StrStr (StringPtr, L"OFFSET");

-  BlockSize   = sizeof (DRIVER_SAMPLE_CONFIGURATION);

-  ValueOffset = OFFSET_OF (DRIVER_SAMPLE_CONFIGURATION, GetDefaultValueFromAccess);

-  ValueWidth  = sizeof (((DRIVER_SAMPLE_CONFIGURATION *)0)->GetDefaultValueFromAccess);

-

-  if (StringPtr == NULL) {

-    return;

-  }

-

-  while (*StringPtr != 0 && StrnCmp (StringPtr, L"OFFSET=", StrLen (L"OFFSET=")) == 0) {

-    StringPtr += StrLen (L"OFFSET=");

-    //

-    // Get Offset

-    //

-    Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);

-    if (EFI_ERROR (Status)) {

-      return;

-    }

-

-    Offset = 0;

-    CopyMem (

-      &Offset,

-      TmpBuffer,

-      (((Length + 1) / 2) < sizeof (UINTN)) ? ((Length + 1) / 2) : sizeof (UINTN)

-      );

-    FreePool (TmpBuffer);

-

-    StringPtr += Length;

-    if (StrnCmp (StringPtr, L"&WIDTH=", StrLen (L"&WIDTH=")) != 0) {

-      return;

-    }

-

-    StringPtr += StrLen (L"&WIDTH=");

-

-    //

-    // Get Width

-    //

-    Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);

-    if (EFI_ERROR (Status)) {

-      return;

-    }

-

-    Width = 0;

-    CopyMem (

-      &Width,

-      TmpBuffer,

-      (((Length + 1) / 2) < sizeof (UINTN)) ? ((Length + 1) / 2) : sizeof (UINTN)

-      );

-    FreePool (TmpBuffer);

-

-    StringPtr += Length;

-    if (StrnCmp (StringPtr, L"&VALUE=", StrLen (L"&VALUE=")) != 0) {

-      return;

-    }

-

-    StringPtr += StrLen (L"&VALUE=");

-

-    //

-    // Get Value

-    //

-    Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);

-    if (EFI_ERROR (Status)) {

-      return;

-    }

-

-    StringPtr += Length;

-

-    //

-    // Skip the character "&" before "OFFSET".

-    //

-    StringPtr++;

-

-    //

-    // Calculate Value and convert it to hex string.

-    //

-    if (Offset + Width > BlockSize) {

-      return;

-    }

-

-    if ((Offset <= ValueOffset) && (Offset + Width >= ValueOffset + ValueWidth)) {

-      *RequestResult = CreateAltCfgString (*RequestResult, ConfigRequestHdr, ValueOffset, ValueWidth);

-      return;

-    }

-  }

-}

-

-/**

-  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

-ExtractConfig (

-  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL  *This,

-  IN  CONST EFI_STRING                      Request,

-  OUT EFI_STRING                            *Progress,

-  OUT EFI_STRING                            *Results

-  )

-{

-  EFI_STATUS                       Status;

-  UINTN                            BufferSize;

-  DRIVER_SAMPLE_PRIVATE_DATA       *PrivateData;

-  EFI_HII_CONFIG_ROUTING_PROTOCOL  *HiiConfigRouting;

-  EFI_STRING                       ConfigRequest;

-  EFI_STRING                       ConfigRequestHdr;

-  UINTN                            Size;

-  EFI_STRING                       Value;

-  UINTN                            ValueStrLen;

-  CHAR16                           BackupChar;

-  CHAR16                           *StrPointer;

-  BOOLEAN                          AllocatedRequest;

-

-  if ((Progress == NULL) || (Results == NULL)) {

-    return EFI_INVALID_PARAMETER;

-  }

-

-  //

-  // Initialize the local variables.

-  //

-  ConfigRequestHdr = NULL;

-  ConfigRequest    = NULL;

-  Size             = 0;

-  *Progress        = Request;

-  AllocatedRequest = FALSE;

-

-  PrivateData      = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);

-  HiiConfigRouting = PrivateData->HiiConfigRouting;

-

-  //

-  // Get Buffer Storage data from EFI variable.

-  // Try to get the current setting from variable.

-  //

-  BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);

-  Status     = gRT->GetVariable (

-                      VariableName,

-                      &gDriverSampleFormSetGuid,

-                      NULL,

-                      &BufferSize,

-                      &PrivateData->Configuration

-                      );

-  if (EFI_ERROR (Status)) {

-    return EFI_NOT_FOUND;

-  }

-

-  if (Request == NULL) {

-    //

-    // Request is set to NULL, construct full request string.

-    //

-

-    //

-    // Allocate and fill a buffer large enough to hold the <ConfigHdr> template

-    // followed by "&OFFSET=0&WIDTH=WWWWWWWWWWWWWWWW" followed by a Null-terminator

-    //

-    ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, VariableName, PrivateData->DriverHandle[0]);

-    Size             = (StrLen (ConfigRequestHdr) + 32 + 1) * sizeof (CHAR16);

-    ConfigRequest    = AllocateZeroPool (Size);

-    ASSERT (ConfigRequest != NULL);

-    AllocatedRequest = TRUE;

-    UnicodeSPrint (ConfigRequest, Size, L"%s&OFFSET=0&WIDTH=%016LX", ConfigRequestHdr, (UINT64)BufferSize);

-    FreePool (ConfigRequestHdr);

-    ConfigRequestHdr = NULL;

-  } else {

-    //

-    // Check routing data in <ConfigHdr>.

-    // Note: if only one Storage is used, then this checking could be skipped.

-    //

-    if (!HiiIsConfigHdrMatch (Request, &gDriverSampleFormSetGuid, NULL)) {

-      return EFI_NOT_FOUND;

-    }

-

-    //

-    // Check whether request for EFI Varstore. EFI varstore get data

-    // through hii database, not support in this path.

-    //

-    if (HiiIsConfigHdrMatch (Request, &gDriverSampleFormSetGuid, MyEfiVar)) {

-      return EFI_UNSUPPORTED;

-    }

-

-    if (HiiIsConfigHdrMatch (Request, &gDriverSampleFormSetGuid, MyEfiBitVar)) {

-      return EFI_UNSUPPORTED;

-    }

-

-    if (HiiIsConfigHdrMatch (Request, &gDriverSampleFormSetGuid, MyEfiUnionVar)) {

-      return EFI_UNSUPPORTED;

-    }

-

-    //

-    // Set Request to the unified request string.

-    //

-    ConfigRequest = Request;

-    //

-    // Check whether Request includes Request Element.

-    //

-    if (StrStr (Request, L"OFFSET") == NULL) {

-      //

-      // Check Request Element does exist in Reques String

-      //

-      StrPointer = StrStr (Request, L"PATH");

-      if (StrPointer == NULL) {

-        return EFI_INVALID_PARAMETER;

-      }

-

-      if (StrStr (StrPointer, L"&") == NULL) {

-        Size          = (StrLen (Request) + 32 + 1) * sizeof (CHAR16);

-        ConfigRequest = AllocateZeroPool (Size);

-        ASSERT (ConfigRequest != NULL);

-        AllocatedRequest = TRUE;

-        UnicodeSPrint (ConfigRequest, Size, L"%s&OFFSET=0&WIDTH=%016LX", Request, (UINT64)BufferSize);

-      }

-    }

-  }

-

-  //

-  // Check if requesting Name/Value storage

-  //

-  if (StrStr (ConfigRequest, L"OFFSET") == NULL) {

-    //

-    // Update Name/Value storage Names

-    //

-    Status = LoadNameValueNames (PrivateData);

-    if (EFI_ERROR (Status)) {

-      return Status;

-    }

-

-    //

-    // Allocate memory for <ConfigResp>, e.g. Name0=0x11, Name1=0x1234, Name2="ABCD"

-    // <Request>   ::=<ConfigHdr>&Name0&Name1&Name2

-    // <ConfigResp>::=<ConfigHdr>&Name0=11&Name1=1234&Name2=0041004200430044

-    //

-    BufferSize = (StrLen (ConfigRequest) +

-                  1 + sizeof (PrivateData->Configuration.NameValueVar0) * 2 +

-                  1 + sizeof (PrivateData->Configuration.NameValueVar1) * 2 +

-                  1 + sizeof (PrivateData->Configuration.NameValueVar2) * 2 + 1) * sizeof (CHAR16);

-    *Results = AllocateZeroPool (BufferSize);

-    ASSERT (*Results != NULL);

-    StrCpyS (*Results, BufferSize / sizeof (CHAR16), ConfigRequest);

-    Value = *Results;

-

-    //

-    // Append value of NameValueVar0, type is UINT8

-    //

-    if ((Value = StrStr (*Results, PrivateData->NameValueName[0])) != NULL) {

-      Value      += StrLen (PrivateData->NameValueName[0]);

-      ValueStrLen = ((sizeof (PrivateData->Configuration.NameValueVar0) * 2) + 1);

-      CopyMem (Value + ValueStrLen, Value, StrSize (Value));

-

-      BackupChar = Value[ValueStrLen];

-      *Value++   = L'=';

-      UnicodeValueToStringS (

-        Value,

-        BufferSize - ((UINTN)Value - (UINTN)*Results),

-        PREFIX_ZERO | RADIX_HEX,

-        PrivateData->Configuration.NameValueVar0,

-        sizeof (PrivateData->Configuration.NameValueVar0) * 2

-        );

-      Value += StrnLenS (Value, (BufferSize - ((UINTN)Value - (UINTN)*Results)) / sizeof (CHAR16));

-      *Value = BackupChar;

-    }

-

-    //

-    // Append value of NameValueVar1, type is UINT16

-    //

-    if ((Value = StrStr (*Results, PrivateData->NameValueName[1])) != NULL) {

-      Value      += StrLen (PrivateData->NameValueName[1]);

-      ValueStrLen = ((sizeof (PrivateData->Configuration.NameValueVar1) * 2) + 1);

-      CopyMem (Value + ValueStrLen, Value, StrSize (Value));

-

-      BackupChar = Value[ValueStrLen];

-      *Value++   = L'=';

-      UnicodeValueToStringS (

-        Value,

-        BufferSize - ((UINTN)Value - (UINTN)*Results),

-        PREFIX_ZERO | RADIX_HEX,

-        PrivateData->Configuration.NameValueVar1,

-        sizeof (PrivateData->Configuration.NameValueVar1) * 2

-        );

-      Value += StrnLenS (Value, (BufferSize - ((UINTN)Value - (UINTN)*Results)) / sizeof (CHAR16));

-      *Value = BackupChar;

-    }

-

-    //

-    // Append value of NameValueVar2, type is CHAR16 *

-    //

-    if ((Value = StrStr (*Results, PrivateData->NameValueName[2])) != NULL) {

-      Value      += StrLen (PrivateData->NameValueName[2]);

-      ValueStrLen = StrLen (PrivateData->Configuration.NameValueVar2) * 4 + 1;

-      CopyMem (Value + ValueStrLen, Value, StrSize (Value));

-

-      *Value++ = L'=';

-      //

-      // Convert Unicode String to Config String, e.g. "ABCD" => "0041004200430044"

-      //

-      StrPointer = (CHAR16 *)PrivateData->Configuration.NameValueVar2;

-      for ( ; *StrPointer != L'\0'; StrPointer++) {

-        UnicodeValueToStringS (

-          Value,

-          BufferSize - ((UINTN)Value - (UINTN)*Results),

-          PREFIX_ZERO | RADIX_HEX,

-          *StrPointer,

-          4

-          );

-        Value += StrnLenS (Value, (BufferSize - ((UINTN)Value - (UINTN)*Results)) / sizeof (CHAR16));

-      }

-    }

-

-    Status = EFI_SUCCESS;

-  } else {

-    //

-    // Convert buffer data to <ConfigResp> by helper function BlockToConfig()

-    //

-    Status = HiiConfigRouting->BlockToConfig (

-                                 HiiConfigRouting,

-                                 ConfigRequest,

-                                 (UINT8 *)&PrivateData->Configuration,

-                                 BufferSize,

-                                 Results,

-                                 Progress

-                                 );

-    if (!EFI_ERROR (Status)) {

-      ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, VariableName, PrivateData->DriverHandle[0]);

-      AppendAltCfgString (Results, ConfigRequestHdr);

-    }

-  }

-

-  //

-  // Free the allocated config request string.

-  //

-  if (AllocatedRequest) {

-    FreePool (ConfigRequest);

-  }

-

-  if (ConfigRequestHdr != NULL) {

-    FreePool (ConfigRequestHdr);

-  }

-

-  //

-  // Set Progress string to the original request string.

-  //

-  if (Request == NULL) {

-    *Progress = NULL;

-  } else if (StrStr (Request, L"OFFSET") == NULL) {

-    *Progress = Request + StrLen (Request);

-  }

-

-  return Status;

-}

-

-/**

-  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.

-  @retval EFI_DEVICE_ERROR       If value is 44, return error for testing.

-

-**/

-EFI_STATUS

-EFIAPI

-RouteConfig (

-  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL  *This,

-  IN  CONST EFI_STRING                      Configuration,

-  OUT EFI_STRING                            *Progress

-  )

-{

-  EFI_STATUS                       Status;

-  UINTN                            BufferSize;

-  DRIVER_SAMPLE_PRIVATE_DATA       *PrivateData;

-  EFI_HII_CONFIG_ROUTING_PROTOCOL  *HiiConfigRouting;

-  CHAR16                           *Value;

-  CHAR16                           *StrPtr;

-  CHAR16                           TemStr[5];

-  UINT8                            *DataBuffer;

-  UINT8                            DigitUint8;

-  UINTN                            Index;

-  CHAR16                           *StrBuffer;

-

-  if ((Configuration == NULL) || (Progress == NULL)) {

-    return EFI_INVALID_PARAMETER;

-  }

-

-  PrivateData      = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);

-  HiiConfigRouting = PrivateData->HiiConfigRouting;

-  *Progress        = Configuration;

-

-  //

-  // Check routing data in <ConfigHdr>.

-  // Note: if only one Storage is used, then this checking could be skipped.

-  //

-  if (!HiiIsConfigHdrMatch (Configuration, &gDriverSampleFormSetGuid, NULL)) {

-    return EFI_NOT_FOUND;

-  }

-

-  //

-  // Check whether request for EFI Varstore. EFI varstore get data

-  // through hii database, not support in this path.

-  //

-  if (HiiIsConfigHdrMatch (Configuration, &gDriverSampleFormSetGuid, MyEfiVar)) {

-    return EFI_UNSUPPORTED;

-  }

-

-  if (HiiIsConfigHdrMatch (Configuration, &gDriverSampleFormSetGuid, MyEfiBitVar)) {

-    return EFI_UNSUPPORTED;

-  }

-

-  if (HiiIsConfigHdrMatch (Configuration, &gDriverSampleFormSetGuid, MyEfiUnionVar)) {

-    return EFI_UNSUPPORTED;

-  }

-

-  //

-  // Get Buffer Storage data from EFI variable

-  //

-  BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);

-  Status     = gRT->GetVariable (

-                      VariableName,

-                      &gDriverSampleFormSetGuid,

-                      NULL,

-                      &BufferSize,

-                      &PrivateData->Configuration

-                      );

-  if (EFI_ERROR (Status)) {

-    return Status;

-  }

-

-  //

-  // Check if configuring Name/Value storage

-  //

-  if (StrStr (Configuration, L"OFFSET") == NULL) {

-    //

-    // Update Name/Value storage Names

-    //

-    Status = LoadNameValueNames (PrivateData);

-    if (EFI_ERROR (Status)) {

-      return Status;

-    }

-

-    //

-    // Convert value for NameValueVar0

-    //

-    if ((Value = StrStr (Configuration, PrivateData->NameValueName[0])) != NULL) {

-      //

-      // Skip "Name="

-      //

-      Value += StrLen (PrivateData->NameValueName[0]);

-      Value++;

-      //

-      // Get Value String

-      //

-      StrPtr = StrStr (Value, L"&");

-      if (StrPtr == NULL) {

-        StrPtr = Value + StrLen (Value);

-      }

-

-      //

-      // Convert Value to Buffer data

-      //

-      DataBuffer = (UINT8 *)&PrivateData->Configuration.NameValueVar0;

-      ZeroMem (TemStr, sizeof (TemStr));

-      for (Index = 0, StrPtr--; StrPtr >= Value; StrPtr--, Index++) {

-        TemStr[0]  = *StrPtr;

-        DigitUint8 = (UINT8)StrHexToUint64 (TemStr);

-        if ((Index & 1) == 0) {

-          DataBuffer[Index/2] = DigitUint8;

-        } else {

-          DataBuffer[Index/2] = (UINT8)((UINT8)(DigitUint8 << 4) + DataBuffer[Index/2]);

-        }

-      }

-    }

-

-    //

-    // Convert value for NameValueVar1

-    //

-    if ((Value = StrStr (Configuration, PrivateData->NameValueName[1])) != NULL) {

-      //

-      // Skip "Name="

-      //

-      Value += StrLen (PrivateData->NameValueName[1]);

-      Value++;

-      //

-      // Get Value String

-      //

-      StrPtr = StrStr (Value, L"&");

-      if (StrPtr == NULL) {

-        StrPtr = Value + StrLen (Value);

-      }

-

-      //

-      // Convert Value to Buffer data

-      //

-      DataBuffer = (UINT8 *)&PrivateData->Configuration.NameValueVar1;

-      ZeroMem (TemStr, sizeof (TemStr));

-      for (Index = 0, StrPtr--; StrPtr >= Value; StrPtr--, Index++) {

-        TemStr[0]  = *StrPtr;

-        DigitUint8 = (UINT8)StrHexToUint64 (TemStr);

-        if ((Index & 1) == 0) {

-          DataBuffer[Index/2] = DigitUint8;

-        } else {

-          DataBuffer[Index/2] = (UINT8)((UINT8)(DigitUint8 << 4) + DataBuffer[Index/2]);

-        }

-      }

-    }

-

-    //

-    // Convert value for NameValueVar2

-    //

-    if ((Value = StrStr (Configuration, PrivateData->NameValueName[2])) != NULL) {

-      //

-      // Skip "Name="

-      //

-      Value += StrLen (PrivateData->NameValueName[2]);

-      Value++;

-      //

-      // Get Value String

-      //

-      StrPtr = StrStr (Value, L"&");

-      if (StrPtr == NULL) {

-        StrPtr = Value + StrLen (Value);

-      }

-

-      //

-      // Convert Config String to Unicode String, e.g "0041004200430044" => "ABCD"

-      //

-      StrBuffer = (CHAR16 *)PrivateData->Configuration.NameValueVar2;

-      ZeroMem (TemStr, sizeof (TemStr));

-      while (Value < StrPtr) {

-        StrnCpyS (TemStr, sizeof (TemStr) / sizeof (CHAR16), Value, 4);

-        *(StrBuffer++) = (CHAR16)StrHexToUint64 (TemStr);

-        Value         += 4;

-      }

-

-      *StrBuffer = L'\0';

-    }

-

-    //

-    // Store Buffer Storage back to EFI variable

-    //

-    Status = gRT->SetVariable (

-                    VariableName,

-                    &gDriverSampleFormSetGuid,

-                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,

-                    sizeof (DRIVER_SAMPLE_CONFIGURATION),

-                    &PrivateData->Configuration

-                    );

-

-    return Status;

-  }

-

-  //

-  // Convert <ConfigResp> to buffer data by helper function ConfigToBlock()

-  //

-  BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);

-  Status     = HiiConfigRouting->ConfigToBlock (

-                                   HiiConfigRouting,

-                                   Configuration,

-                                   (UINT8 *)&PrivateData->Configuration,

-                                   &BufferSize,

-                                   Progress

-                                   );

-  if (EFI_ERROR (Status)) {

-    return Status;

-  }

-

-  if (PrivateData->Configuration.QuestionApply == 44) {

-    // Return error for verify the error handling of caller.

-    return EFI_DEVICE_ERROR;

-  }

-

-  //

-  // Store Buffer Storage back to EFI variable

-  //

-  Status = gRT->SetVariable (

-                  VariableName,

-                  &gDriverSampleFormSetGuid,

-                  EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,

-                  sizeof (DRIVER_SAMPLE_CONFIGURATION),

-                  &PrivateData->Configuration

-                  );

-

-  return Status;

-}

-

-/**

-  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

-DriverCallback (

-  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

-  )

-{

-  DRIVER_SAMPLE_PRIVATE_DATA   *PrivateData;

-  EFI_STATUS                   Status;

-  VOID                         *StartOpCodeHandle;

-  VOID                         *OptionsOpCodeHandle;

-  EFI_IFR_GUID_LABEL           *StartLabel;

-  VOID                         *EndOpCodeHandle;

-  EFI_IFR_GUID_LABEL           *EndLabel;

-  EFI_INPUT_KEY                Key;

-  DRIVER_SAMPLE_CONFIGURATION  *Configuration;

-  MY_EFI_VARSTORE_DATA         *EfiData;

-  EFI_FORM_ID                  FormId;

-  EFI_STRING                   Progress;

-  EFI_STRING                   Results;

-  UINT32                       ProgressErr;

-  CHAR16                       *TmpStr;

-  UINTN                        Index;

-  UINT64                       BufferValue;

-  EFI_HII_POPUP_SELECTION      UserSelection;

-

-  UserSelection = 0xFF;

-

-  if (((Value == NULL) && (Action != EFI_BROWSER_ACTION_FORM_OPEN) && (Action != EFI_BROWSER_ACTION_FORM_CLOSE)) ||

-      (ActionRequest == NULL))

-  {

-    return EFI_INVALID_PARAMETER;

-  }

-

-  FormId      = 0;

-  ProgressErr = 0;

-  Status      = EFI_SUCCESS;

-  BufferValue = 3;

-  PrivateData = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);

-

-  switch (Action) {

-    case EFI_BROWSER_ACTION_FORM_OPEN:

-    {

-      if (QuestionId == 0x1234) {

-        //

-        // Sample CallBack for UEFI FORM_OPEN action:

-        //   Add Save action into Form 3 when Form 1 is opened.

-        //   This will be done only in FORM_OPEN CallBack of question with ID 0x1234 from Form 1.

-        //

-        PrivateData = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);

-

-        //

-        // Initialize the container for dynamic opcodes

-        //

-        StartOpCodeHandle = HiiAllocateOpCodeHandle ();

-        ASSERT (StartOpCodeHandle != 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_UPDATE2;

-

-        HiiCreateActionOpCode (

-          StartOpCodeHandle,                // Container for dynamic created opcodes

-          0x1238,                           // Question ID

-          STRING_TOKEN (STR_SAVE_TEXT),     // Prompt text

-          STRING_TOKEN (STR_SAVE_TEXT),     // Help text

-          EFI_IFR_FLAG_CALLBACK,            // Question flag

-          0                                 // Action String ID

-          );

-

-        HiiUpdateForm (

-          PrivateData->HiiHandle[0],  // HII handle

-          &gDriverSampleFormSetGuid,  // Formset GUID

-          0x3,                        // Form ID

-          StartOpCodeHandle,          // Label for where to insert opcodes

-          NULL                        // Insert data

-          );

-

-        HiiFreeOpCodeHandle (StartOpCodeHandle);

-      }

-

-      if (QuestionId == 0x1247) {

-        Status = InternalStartMonitor ();

-        ASSERT_EFI_ERROR (Status);

-      }

-

-      break;

-    }

-

-    case EFI_BROWSER_ACTION_FORM_CLOSE:

-    {

-      if (QuestionId == 0x5678) {

-        //

-        // Sample CallBack for UEFI FORM_CLOSE action:

-        //   Show up a pop-up to specify Form 3 will be closed when exit Form 3.

-        //

-        do {

-          CreatePopUp (

-            EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,

-            &Key,

-            L"",

-            L"You are going to leave third Form!",

-            L"Press ESC or ENTER to continue ...",

-            L"",

-            NULL

-            );

-        } while ((Key.ScanCode != SCAN_ESC) && (Key.UnicodeChar != CHAR_CARRIAGE_RETURN));

-      }

-

-      if (QuestionId == 0x1247) {

-        Status = InternalStopMonitor ();

-        ASSERT_EFI_ERROR (Status);

-      }

-

-      break;

-    }

-

-    case EFI_BROWSER_ACTION_RETRIEVE:

-    {

-      switch (QuestionId ) {

-        case 0x1248:

-          if (Type != EFI_IFR_TYPE_REF) {

-            return EFI_INVALID_PARAMETER;

-          }

-

-          Value->ref.FormId = 0x3;

-          break;

-

-        case 0x5678:

-        case 0x1247:

-          //

-          // We will reach here once the Question is refreshed

-          //

-

-          //

-          // Initialize the container for dynamic opcodes

-          //

-          StartOpCodeHandle = HiiAllocateOpCodeHandle ();

-          ASSERT (StartOpCodeHandle != 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;

-          if (QuestionId == 0x5678) {

-            StartLabel->Number = LABEL_UPDATE2;

-            FormId             = 0x03;

-            PrivateData->Configuration.DynamicRefresh++;

-          } else if (QuestionId == 0x1247 ) {

-            StartLabel->Number = LABEL_UPDATE3;

-            FormId             = 0x06;

-            PrivateData->Configuration.RefreshGuidCount++;

-          }

-

-          HiiCreateActionOpCode (

-            StartOpCodeHandle,              // Container for dynamic created opcodes

-            0x1237,                         // Question ID

-            STRING_TOKEN (STR_EXIT_TEXT),   // Prompt text

-            STRING_TOKEN (STR_EXIT_TEXT),   // Help text

-            EFI_IFR_FLAG_CALLBACK,          // Question flag

-            0                               // Action String ID

-            );

-

-          HiiUpdateForm (

-            PrivateData->HiiHandle[0],      // HII handle

-            &gDriverSampleFormSetGuid,      // Formset GUID

-            FormId,                         // Form ID

-            StartOpCodeHandle,              // Label for where to insert opcodes

-            NULL                            // Insert data

-            );

-

-          HiiFreeOpCodeHandle (StartOpCodeHandle);

-

-          //

-          // Refresh the Question value

-          //

-          Status = gRT->SetVariable (

-                          VariableName,

-                          &gDriverSampleFormSetGuid,

-                          EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,

-                          sizeof (DRIVER_SAMPLE_CONFIGURATION),

-                          &PrivateData->Configuration

-                          );

-

-          if (QuestionId == 0x5678) {

-            //

-            // Update uncommitted data of Browser

-            //

-            EfiData = AllocateZeroPool (sizeof (MY_EFI_VARSTORE_DATA));

-            ASSERT (EfiData != NULL);

-            if (HiiGetBrowserData (&gDriverSampleFormSetGuid, MyEfiVar, sizeof (MY_EFI_VARSTORE_DATA), (UINT8 *)EfiData)) {

-              EfiData->Field8 = 111;

-              HiiSetBrowserData (

-                &gDriverSampleFormSetGuid,

-                MyEfiVar,

-                sizeof (MY_EFI_VARSTORE_DATA),

-                (UINT8 *)EfiData,

-                NULL

-                );

-            }

-

-            FreePool (EfiData);

-          }

-

-          break;

-      }

-

-      break;

-    }

-

-    case EFI_BROWSER_ACTION_DEFAULT_STANDARD:

-    {

-      switch (QuestionId) {

-        case 0x1240:

-          Value->u8 = DEFAULT_CLASS_STANDARD_VALUE;

-          break;

-

-        case 0x1252:

-          for (Index = 0; Index < 3; Index++) {

-            SetArrayData (Value, EFI_IFR_TYPE_NUM_SIZE_8, Index, BufferValue--);

-          }

-

-          break;

-

-        case 0x6666:

-          Value->u8 = 12;

-          break;

-

-        default:

-          Status = EFI_UNSUPPORTED;

-          break;

-      }

-

-      break;

-    }

-

-    case EFI_BROWSER_ACTION_DEFAULT_MANUFACTURING:

-    {

-      switch (QuestionId) {

-        case 0x1240:

-          Value->u8 = DEFAULT_CLASS_MANUFACTURING_VALUE;

-          break;

-

-        case 0x6666:

-          Value->u8 = 13;

-          break;

-

-        default:

-          Status = EFI_UNSUPPORTED;

-          break;

-      }

-

-      break;

-    }

-

-    case EFI_BROWSER_ACTION_CHANGING:

-    {

-      switch (QuestionId) {

-        case 0x1249:

-        {

-          if (Type != EFI_IFR_TYPE_REF) {

-            return EFI_INVALID_PARAMETER;

-          }

-

-          Value->ref.FormId = 0x1234;

-          break;

-        }

-        case 0x1234:

-          //

-          // Initialize the container for dynamic opcodes

-          //

-          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_UPDATE1;

-

-          //

-          // 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;

-

-          HiiCreateActionOpCode (

-            StartOpCodeHandle,            // Container for dynamic created opcodes

-            0x1237,                       // Question ID

-            STRING_TOKEN (STR_EXIT_TEXT), // Prompt text

-            STRING_TOKEN (STR_EXIT_TEXT), // Help text

-            EFI_IFR_FLAG_CALLBACK,        // Question flag

-            0                             // Action String ID

-            );

-

-          //

-          // Create Option OpCode

-          //

-          OptionsOpCodeHandle = HiiAllocateOpCodeHandle ();

-          ASSERT (OptionsOpCodeHandle != NULL);

-

-          HiiCreateOneOfOptionOpCode (

-            OptionsOpCodeHandle,

-            STRING_TOKEN (STR_BOOT_OPTION1),

-            0,

-            EFI_IFR_NUMERIC_SIZE_1,

-            1

-            );

-

-          HiiCreateOneOfOptionOpCode (

-            OptionsOpCodeHandle,

-            STRING_TOKEN (STR_BOOT_OPTION2),

-            0,

-            EFI_IFR_NUMERIC_SIZE_1,

-            2

-            );

-

-          //

-          // Prepare initial value for the dynamic created oneof Question

-          //

-          PrivateData->Configuration.DynamicOneof = 2;

-          Status                                  = gRT->SetVariable (

-                                                           VariableName,

-                                                           &gDriverSampleFormSetGuid,

-                                                           EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,

-                                                           sizeof (DRIVER_SAMPLE_CONFIGURATION),

-                                                           &PrivateData->Configuration

-                                                           );

-

-          //

-          // Set initial vlaue of dynamic created oneof Question in Form Browser

-          //

-          Configuration = AllocateZeroPool (sizeof (DRIVER_SAMPLE_CONFIGURATION));

-          ASSERT (Configuration != NULL);

-          if (HiiGetBrowserData (&gDriverSampleFormSetGuid, VariableName, sizeof (DRIVER_SAMPLE_CONFIGURATION), (UINT8 *)Configuration)) {

-            Configuration->DynamicOneof = 2;

-

-            //

-            // Update uncommitted data of Browser

-            //

-            HiiSetBrowserData (

-              &gDriverSampleFormSetGuid,

-              VariableName,

-              sizeof (DRIVER_SAMPLE_CONFIGURATION),

-              (UINT8 *)Configuration,

-              NULL

-              );

-          }

-

-          FreePool (Configuration);

-

-          HiiCreateOneOfOpCode (

-            StartOpCodeHandle,                     // Container for dynamic created opcodes

-            0x8001,                                // Question ID (or call it "key")

-            CONFIGURATION_VARSTORE_ID,             // VarStore ID

-            (UINT16)DYNAMIC_ONE_OF_VAR_OFFSET,     // Offset in Buffer Storage

-            STRING_TOKEN (STR_ONE_OF_PROMPT),      // Question prompt text

-            STRING_TOKEN (STR_ONE_OF_HELP),        // Question help text

-            EFI_IFR_FLAG_CALLBACK,                 // Question flag

-            EFI_IFR_NUMERIC_SIZE_1,                // Data type of Question Value

-            OptionsOpCodeHandle,                   // Option Opcode list

-            NULL                                   // Default Opcode is NULl

-            );

-

-          HiiCreateOrderedListOpCode (

-            StartOpCodeHandle,                       // Container for dynamic created opcodes

-            0x8002,                                  // Question ID

-            CONFIGURATION_VARSTORE_ID,               // VarStore ID

-            (UINT16)DYNAMIC_ORDERED_LIST_VAR_OFFSET, // Offset in Buffer Storage

-            STRING_TOKEN (STR_BOOT_OPTIONS),         // Question prompt text

-            STRING_TOKEN (STR_BOOT_OPTIONS),         // Question help text

-            EFI_IFR_FLAG_RESET_REQUIRED,             // Question flag

-            0,                                       // Ordered list flag, e.g. EFI_IFR_UNIQUE_SET

-            EFI_IFR_NUMERIC_SIZE_1,                  // Data type of Question value

-            5,                                       // Maximum container

-            OptionsOpCodeHandle,                     // Option Opcode list

-            NULL                                     // Default Opcode is NULl

-            );

-

-          HiiCreateTextOpCode (

-            StartOpCodeHandle,

-            STRING_TOKEN (STR_TEXT_SAMPLE_HELP),

-            STRING_TOKEN (STR_TEXT_SAMPLE_HELP),

-            STRING_TOKEN (STR_TEXT_SAMPLE_STRING)

-            );

-

-          HiiCreateDateOpCode (

-            StartOpCodeHandle,

-            0x8004,

-            0x0,

-            0x0,

-            STRING_TOKEN (STR_DATE_SAMPLE_HELP),

-            STRING_TOKEN (STR_DATE_SAMPLE_HELP),

-            0,

-            QF_DATE_STORAGE_TIME,

-            NULL

-            );

-

-          HiiCreateTimeOpCode (

-            StartOpCodeHandle,

-            0x8005,

-            0x0,

-            0x0,

-            STRING_TOKEN (STR_TIME_SAMPLE_HELP),

-            STRING_TOKEN (STR_TIME_SAMPLE_HELP),

-            0,

-            QF_TIME_STORAGE_TIME,

-            NULL

-            );

-

-          HiiCreateGotoOpCode (

-            StartOpCodeHandle,             // Container for dynamic created opcodes

-            1,                             // Target Form ID

-            STRING_TOKEN (STR_GOTO_FORM1), // Prompt text

-            STRING_TOKEN (STR_GOTO_HELP),  // Help text

-            0,                             // Question flag

-            0x8003                         // Question ID

-            );

-

-          HiiUpdateForm (

-            PrivateData->HiiHandle[0], // HII handle

-            &gDriverSampleFormSetGuid, // Formset GUID

-            0x1234,                    // Form ID

-            StartOpCodeHandle,         // Label for where to insert opcodes

-            EndOpCodeHandle            // Replace data

-            );

-

-          HiiFreeOpCodeHandle (StartOpCodeHandle);

-          HiiFreeOpCodeHandle (OptionsOpCodeHandle);

-          HiiFreeOpCodeHandle (EndOpCodeHandle);

-          break;

-

-        default:

-          break;

-      }

-

-      break;

-    }

-

-    case EFI_BROWSER_ACTION_CHANGED:

-      switch (QuestionId) {

-        case 0x1237:

-          //

-          // User press "Exit now", request Browser to exit

-          //

-          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_EXIT;

-          break;

-

-        case 0x1238:

-          //

-          // User press "Save now", request Browser to save the uncommitted data.

-          //

-          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_SUBMIT;

-          break;

-

-        case 0x1241:

-        case 0x1246:

-          //

-          // User press "Submit current form and Exit now", request Browser to submit current form and exit

-          //

-          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT;

-          break;

-

-        case 0x1242:

-          //

-          // User press "Discard current form now", request Browser to discard the uncommitted data.

-          //

-          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD;

-          break;

-

-        case 0x1243:

-          //

-          // User press "Submit current form now", request Browser to save the uncommitted data.

-          //

-          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_APPLY;

-          break;

-

-        case 0x1244:

-        case 0x1245:

-          //

-          // User press "Discard current form and Exit now", request Browser to discard the uncommitted data and exit.

-          //

-          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT;

-          break;

-

-        case 0x1253:

-          //

-          // User change the value of "Question apply test".

-          //

-          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_QUESTION_APPLY;

-          break;

-

-        case 0x1231:

-          //

-          // 1. Check to see whether system support keyword.

-          //

-          Status = PrivateData->HiiKeywordHandler->GetData (

-                                                     PrivateData->HiiKeywordHandler,

-                                                     L"NAMESPACE=x-UEFI-ns",

-                                                     L"KEYWORD=iSCSIBootEnable",

-                                                     &Progress,

-                                                     &ProgressErr,

-                                                     &Results

-                                                     );

-          if (EFI_ERROR (Status)) {

-            do {

-              CreatePopUp (

-                EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,

-                &Key,

-                L"",

-                L"This system not support this keyword!",

-                L"Press ENTER to continue ...",

-                L"",

-                NULL

-                );

-            } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

-

-            Status = EFI_SUCCESS;

-            break;

-          }

-

-          //

-          // 2. If system support this keyword, just try to change value.

-          //

-

-          //

-          // Change value from '0' to '1' or from '1' to '0'

-          //

-          TmpStr = StrStr (Results, L"&VALUE=");

-          ASSERT (TmpStr != NULL);

-          TmpStr += StrLen (L"&VALUE=");

-          TmpStr++;

-          if (*TmpStr == L'0') {

-            *TmpStr = L'1';

-          } else {

-            *TmpStr = L'0';

-          }

-

-          //

-          // 3. Call the keyword handler protocol to change the value.

-          //

-          Status = PrivateData->HiiKeywordHandler->SetData (

-                                                     PrivateData->HiiKeywordHandler,

-                                                     Results,

-                                                     &Progress,

-                                                     &ProgressErr

-                                                     );

-          if (EFI_ERROR (Status)) {

-            do {

-              CreatePopUp (

-                EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,

-                &Key,

-                L"",

-                L"Set keyword to the system failed!",

-                L"Press ENTER to continue ...",

-                L"",

-                NULL

-                );

-            } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

-

-            Status = EFI_SUCCESS;

-            break;

-          }

-

-          break;

-

-        case 0x1330:

-          Status = mPrivateData->HiiPopup->CreatePopup (

-                                             mPrivateData->HiiPopup,

-                                             EfiHiiPopupStyleInfo,

-                                             EfiHiiPopupTypeYesNo,

-                                             mPrivateData->HiiHandle[0],

-                                             STRING_TOKEN (STR_POPUP_STRING),

-                                             &UserSelection

-                                             );

-          if (!EFI_ERROR (Status)) {

-            if (UserSelection == EfiHiiPopupSelectionYes) {

-              *ActionRequest = EFI_BROWSER_ACTION_REQUEST_EXIT;

-            }

-          }

-

-          break;

-

-        default:

-          break;

-      }

-

-      break;

-

-    case EFI_BROWSER_ACTION_SUBMITTED:

-    {

-      if (QuestionId == 0x1250) {

-        //

-        // Sample CallBack for EFI_BROWSER_ACTION_SUBMITTED action:

-        // Show up a pop-up to show SUBMITTED callback has been triggered.

-        //

-        do {

-          CreatePopUp (

-            EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,

-            &Key,

-            L"",

-            L"EfiVarstore value has been submitted!",

-            L"Press ESC or ENTER to continue ...",

-            L"",

-            NULL

-            );

-        } while ((Key.ScanCode != SCAN_ESC) && (Key.UnicodeChar != CHAR_CARRIAGE_RETURN));

-      }

-

-      break;

-    }

-

-    default:

-      Status = EFI_UNSUPPORTED;

-      break;

-  }

-

-  return Status;

-}

-

-/**

-  Main entry for this driver.

-

-  @param ImageHandle     Image handle this driver.

-  @param SystemTable     Pointer to SystemTable.

-

-  @retval EFI_SUCESS     This function always complete successfully.

-

-**/

-EFI_STATUS

-EFIAPI

-DriverSampleInit (

-  IN EFI_HANDLE        ImageHandle,

-  IN EFI_SYSTEM_TABLE  *SystemTable

-  )

-{

-  EFI_STATUS                             Status;

-  EFI_HII_HANDLE                         HiiHandle[2];

-  EFI_SCREEN_DESCRIPTOR                  Screen;

-  EFI_HII_DATABASE_PROTOCOL              *HiiDatabase;

-  EFI_HII_STRING_PROTOCOL                *HiiString;

-  EFI_FORM_BROWSER2_PROTOCOL             *FormBrowser2;

-  EFI_HII_CONFIG_ROUTING_PROTOCOL        *HiiConfigRouting;

-  EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL    *HiiKeywordHandler;

-  EFI_HII_POPUP_PROTOCOL                 *PopupHandler;

-  CHAR16                                 *NewString;

-  UINTN                                  BufferSize;

-  DRIVER_SAMPLE_CONFIGURATION            *Configuration;

-  BOOLEAN                                ActionFlag;

-  EFI_STRING                             ConfigRequestHdr;

-  EFI_STRING                             NameRequestHdr;

-  MY_EFI_VARSTORE_DATA                   *VarStoreConfig;

-  MY_EFI_BITS_VARSTORE_DATA              *BitsVarStoreConfig;

-  MY_EFI_UNION_DATA                      *UnionConfig;

-  EFI_INPUT_KEY                          HotKey;

-  EDKII_FORM_BROWSER_EXTENSION_PROTOCOL  *FormBrowserEx;

-

-  //

-  // Initialize the local variables.

-  //

-  ConfigRequestHdr = NULL;

-  NewString        = NULL;

-

-  //

-  // Initialize screen dimensions for SendForm().

-  // Remove 3 characters from top and bottom

-  //

-  ZeroMem (&Screen, sizeof (EFI_SCREEN_DESCRIPTOR));

-  gST->ConOut->QueryMode (gST->ConOut, gST->ConOut->Mode->Mode, &Screen.RightColumn, &Screen.BottomRow);

-

-  Screen.TopRow    = 3;

-  Screen.BottomRow = Screen.BottomRow - 3;

-

-  //

-  // Initialize driver private data

-  //

-  mPrivateData = AllocateZeroPool (sizeof (DRIVER_SAMPLE_PRIVATE_DATA));

-  if (mPrivateData == NULL) {

-    return EFI_OUT_OF_RESOURCES;

-  }

-

-  mPrivateData->Signature = DRIVER_SAMPLE_PRIVATE_SIGNATURE;

-

-  mPrivateData->ConfigAccess.ExtractConfig = ExtractConfig;

-  mPrivateData->ConfigAccess.RouteConfig   = RouteConfig;

-  mPrivateData->ConfigAccess.Callback      = DriverCallback;

-

-  //

-  // Locate Hii Database protocol

-  //

-  Status = gBS->LocateProtocol (&gEfiHiiDatabaseProtocolGuid, NULL, (VOID **)&HiiDatabase);

-  if (EFI_ERROR (Status)) {

-    return Status;

-  }

-

-  mPrivateData->HiiDatabase = HiiDatabase;

-

-  //

-  // Locate HiiString protocol

-  //

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

-  if (EFI_ERROR (Status)) {

-    return Status;

-  }

-

-  mPrivateData->HiiString = HiiString;

-

-  //

-  // Locate Formbrowser2 protocol

-  //

-  Status = gBS->LocateProtocol (&gEfiFormBrowser2ProtocolGuid, NULL, (VOID **)&FormBrowser2);

-  if (EFI_ERROR (Status)) {

-    return Status;

-  }

-

-  mPrivateData->FormBrowser2 = FormBrowser2;

-

-  //

-  // Locate ConfigRouting protocol

-  //

-  Status = gBS->LocateProtocol (&gEfiHiiConfigRoutingProtocolGuid, NULL, (VOID **)&HiiConfigRouting);

-  if (EFI_ERROR (Status)) {

-    return Status;

-  }

-

-  mPrivateData->HiiConfigRouting = HiiConfigRouting;

-

-  //

-  // Locate keyword handler protocol

-  //

-  Status = gBS->LocateProtocol (&gEfiConfigKeywordHandlerProtocolGuid, NULL, (VOID **)&HiiKeywordHandler);

-  if (EFI_ERROR (Status)) {

-    return Status;

-  }

-

-  mPrivateData->HiiKeywordHandler = HiiKeywordHandler;

-

-  //

-  // Locate HiiPopup protocol

-  //

-  Status = gBS->LocateProtocol (&gEfiHiiPopupProtocolGuid, NULL, (VOID **)&PopupHandler);

-  if (EFI_ERROR (Status)) {

-    return Status;

-  }

-

-  mPrivateData->HiiPopup = PopupHandler;

-

-  Status = gBS->InstallMultipleProtocolInterfaces (

-                  &DriverHandle[0],

-                  &gEfiDevicePathProtocolGuid,

-                  &mHiiVendorDevicePath0,

-                  &gEfiHiiConfigAccessProtocolGuid,

-                  &mPrivateData->ConfigAccess,

-                  NULL

-                  );

-  ASSERT_EFI_ERROR (Status);

-

-  mPrivateData->DriverHandle[0] = DriverHandle[0];

-

-  //

-  // Publish our HII data

-  //

-  HiiHandle[0] = HiiAddPackages (

-                   &gDriverSampleFormSetGuid,

-                   DriverHandle[0],

-                   DriverSampleStrings,

-                   VfrBin,

-                   NULL

-                   );

-  if (HiiHandle[0] == NULL) {

-    return EFI_OUT_OF_RESOURCES;

-  }

-

-  mPrivateData->HiiHandle[0] = HiiHandle[0];

-

-  //

-  // Publish another Fromset

-  //

-  Status = gBS->InstallMultipleProtocolInterfaces (

-                  &DriverHandle[1],

-                  &gEfiDevicePathProtocolGuid,

-                  &mHiiVendorDevicePath1,

-                  &gEfiHiiConfigAccessProtocolGuid,

-                  &mPrivateData->ConfigAccess,

-                  NULL

-                  );

-  ASSERT_EFI_ERROR (Status);

-

-  mPrivateData->DriverHandle[1] = DriverHandle[1];

-

-  HiiHandle[1] = HiiAddPackages (

-                   &gDriverSampleInventoryGuid,

-                   DriverHandle[1],

-                   DriverSampleStrings,

-                   InventoryBin,

-                   NULL

-                   );

-  if (HiiHandle[1] == NULL) {

-    DriverSampleUnload (ImageHandle);

-    return EFI_OUT_OF_RESOURCES;

-  }

-

-  mPrivateData->HiiHandle[1] = HiiHandle[1];

-

-  //

-  // Update the device path string.

-  //

-  NewString = ConvertDevicePathToText ((EFI_DEVICE_PATH_PROTOCOL *)&mHiiVendorDevicePath0, FALSE, FALSE);

-  if (HiiSetString (HiiHandle[0], STRING_TOKEN (STR_DEVICE_PATH), NewString, NULL) == 0) {

-    DriverSampleUnload (ImageHandle);

-    return EFI_OUT_OF_RESOURCES;

-  }

-

-  if (NewString != NULL) {

-    FreePool (NewString);

-  }

-

-  //

-  // Very simple example of how one would update a string that is already

-  // in the HII database

-  //

-  NewString = L"700 Mhz";

-

-  if (HiiSetString (HiiHandle[0], STRING_TOKEN (STR_CPU_STRING2), NewString, NULL) == 0) {

-    DriverSampleUnload (ImageHandle);

-    return EFI_OUT_OF_RESOURCES;

-  }

-

-  HiiSetString (HiiHandle[0], 0, NewString, NULL);

-

-  //

-  // Initialize Name/Value name String ID

-  //

-  mPrivateData->NameStringId[0] = STR_NAME_VALUE_VAR_NAME0;

-  mPrivateData->NameStringId[1] = STR_NAME_VALUE_VAR_NAME1;

-  mPrivateData->NameStringId[2] = STR_NAME_VALUE_VAR_NAME2;

-

-  //

-  // Initialize configuration data

-  //

-  Configuration = &mPrivateData->Configuration;

-  ZeroMem (Configuration, sizeof (DRIVER_SAMPLE_CONFIGURATION));

-

-  //

-  // Try to read NV config EFI variable first

-  //

-  ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, VariableName, DriverHandle[0]);

-  ASSERT (ConfigRequestHdr != NULL);

-

-  NameRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, NULL, DriverHandle[0]);

-  ASSERT (NameRequestHdr != NULL);

-

-  BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);

-  Status     = gRT->GetVariable (VariableName, &gDriverSampleFormSetGuid, NULL, &BufferSize, Configuration);

-  if (EFI_ERROR (Status)) {

-    //

-    // Store zero data Buffer Storage to EFI variable

-    //

-    Status = gRT->SetVariable (

-                    VariableName,

-                    &gDriverSampleFormSetGuid,

-                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,

-                    sizeof (DRIVER_SAMPLE_CONFIGURATION),

-                    Configuration

-                    );

-    if (EFI_ERROR (Status)) {

-      DriverSampleUnload (ImageHandle);

-      return Status;

-    }

-

-    //

-    // EFI variable for NV config doesn't exit, we should build this variable

-    // based on default values stored in IFR

-    //

-    ActionFlag = HiiSetToDefaults (NameRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-

-    ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-  } else {

-    //

-    // EFI variable does exist and Validate Current Setting

-    //

-    ActionFlag = HiiValidateSettings (NameRequestHdr);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-

-    ActionFlag = HiiValidateSettings (ConfigRequestHdr);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-  }

-

-  FreePool (ConfigRequestHdr);

-

-  //

-  // Initialize efi varstore configuration data

-  //

-  VarStoreConfig = &mPrivateData->VarStoreConfig;

-  ZeroMem (VarStoreConfig, sizeof (MY_EFI_VARSTORE_DATA));

-

-  ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, MyEfiVar, DriverHandle[0]);

-  ASSERT (ConfigRequestHdr != NULL);

-

-  BufferSize = sizeof (MY_EFI_VARSTORE_DATA);

-  Status     = gRT->GetVariable (MyEfiVar, &gDriverSampleFormSetGuid, NULL, &BufferSize, VarStoreConfig);

-  if (EFI_ERROR (Status)) {

-    //

-    // Store zero data to EFI variable Storage.

-    //

-    Status = gRT->SetVariable (

-                    MyEfiVar,

-                    &gDriverSampleFormSetGuid,

-                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,

-                    sizeof (MY_EFI_VARSTORE_DATA),

-                    VarStoreConfig

-                    );

-    if (EFI_ERROR (Status)) {

-      DriverSampleUnload (ImageHandle);

-      return Status;

-    }

-

-    //

-    // EFI variable for NV config doesn't exit, we should build this variable

-    // based on default values stored in IFR

-    //

-    ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-  } else {

-    //

-    // EFI variable does exist and Validate Current Setting

-    //

-    ActionFlag = HiiValidateSettings (ConfigRequestHdr);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-  }

-

-  FreePool (ConfigRequestHdr);

-

-  //

-  // Initialize Bits efi varstore configuration data

-  //

-  BitsVarStoreConfig = &mPrivateData->BitsVarStoreConfig;

-  ZeroMem (BitsVarStoreConfig, sizeof (MY_EFI_BITS_VARSTORE_DATA));

-

-  ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, MyEfiBitVar, DriverHandle[0]);

-  ASSERT (ConfigRequestHdr != NULL);

-

-  BufferSize = sizeof (MY_EFI_BITS_VARSTORE_DATA);

-  Status     = gRT->GetVariable (MyEfiBitVar, &gDriverSampleFormSetGuid, NULL, &BufferSize, BitsVarStoreConfig);

-  if (EFI_ERROR (Status)) {

-    //

-    // Store zero data to EFI variable Storage.

-    //

-    Status = gRT->SetVariable (

-                    MyEfiBitVar,

-                    &gDriverSampleFormSetGuid,

-                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,

-                    sizeof (MY_EFI_BITS_VARSTORE_DATA),

-                    BitsVarStoreConfig

-                    );

-    if (EFI_ERROR (Status)) {

-      DriverSampleUnload (ImageHandle);

-      return Status;

-    }

-

-    //

-    // EFI variable for NV config doesn't exit, we should build this variable

-    // based on default values stored in IFR

-    //

-    ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-  } else {

-    //

-    // EFI variable does exist and Validate Current Setting

-    //

-    ActionFlag = HiiValidateSettings (ConfigRequestHdr);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-  }

-

-  FreePool (ConfigRequestHdr);

-

-  //

-  // Initialize Union efi varstore configuration data

-  //

-  UnionConfig = &mPrivateData->UnionConfig;

-  ZeroMem (UnionConfig, sizeof (MY_EFI_UNION_DATA));

-

-  ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, MyEfiUnionVar, DriverHandle[0]);

-  ASSERT (ConfigRequestHdr != NULL);

-

-  BufferSize = sizeof (MY_EFI_UNION_DATA);

-  Status     = gRT->GetVariable (MyEfiUnionVar, &gDriverSampleFormSetGuid, NULL, &BufferSize, UnionConfig);

-  if (EFI_ERROR (Status)) {

-    //

-    // Store zero data to EFI variable Storage.

-    //

-    Status = gRT->SetVariable (

-                    MyEfiUnionVar,

-                    &gDriverSampleFormSetGuid,

-                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,

-                    sizeof (MY_EFI_UNION_DATA),

-                    UnionConfig

-                    );

-    if (EFI_ERROR (Status)) {

-      DriverSampleUnload (ImageHandle);

-      return Status;

-    }

-

-    //

-    // EFI variable for NV config doesn't exit, we should build this variable

-    // based on default values stored in IFR

-    //

-    ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-  } else {

-    //

-    // EFI variable does exist and Validate Current Setting

-    //

-    ActionFlag = HiiValidateSettings (ConfigRequestHdr);

-    if (!ActionFlag) {

-      DriverSampleUnload (ImageHandle);

-      return EFI_INVALID_PARAMETER;

-    }

-  }

-

-  FreePool (ConfigRequestHdr);

-

-  Status = gBS->CreateEventEx (

-                  EVT_NOTIFY_SIGNAL,

-                  TPL_NOTIFY,

-                  EfiEventEmptyFunction,

-                  NULL,

-                  &gEfiIfrRefreshIdOpGuid,

-                  &mEvent

-                  );

-  ASSERT_EFI_ERROR (Status);

-

-  //

-  // Example of how to use BrowserEx protocol to register HotKey.

-  //

-  Status = gBS->LocateProtocol (&gEdkiiFormBrowserExProtocolGuid, NULL, (VOID **)&FormBrowserEx);

-  if (!EFI_ERROR (Status)) {

-    //

-    // First unregister the default hot key F9 and F10.

-    //

-    HotKey.UnicodeChar = CHAR_NULL;

-    HotKey.ScanCode    = SCAN_F9;

-    FormBrowserEx->RegisterHotKey (&HotKey, 0, 0, NULL);

-    HotKey.ScanCode = SCAN_F10;

-    FormBrowserEx->RegisterHotKey (&HotKey, 0, 0, NULL);

-

-    //

-    // Register the default HotKey F9 and F10 again.

-    //

-    HotKey.ScanCode = SCAN_F10;

-    NewString       = HiiGetString (mPrivateData->HiiHandle[0], STRING_TOKEN (FUNCTION_TEN_STRING), NULL);

-    ASSERT (NewString != NULL);

-    FormBrowserEx->RegisterHotKey (&HotKey, BROWSER_ACTION_SUBMIT, 0, NewString);

-    HotKey.ScanCode = SCAN_F9;

-    NewString       = HiiGetString (mPrivateData->HiiHandle[0], STRING_TOKEN (FUNCTION_NINE_STRING), NULL);

-    ASSERT (NewString != NULL);

-    FormBrowserEx->RegisterHotKey (&HotKey, BROWSER_ACTION_DEFAULT, EFI_HII_DEFAULT_CLASS_STANDARD, NewString);

-  }

-

-  //

-  // In default, this driver is built into Flash device image,

-  // the following code doesn't run.

-  //

-

-  //

-  // Example of how to display only the item we sent to HII

-  // When this driver is not built into Flash device image,

-  // it need to call SendForm to show front page by itself.

-  //

-  if (DISPLAY_ONLY_MY_ITEM <= 1) {

-    //

-    // Have the browser pull out our copy of the data, and only display our data

-    //

-    Status = FormBrowser2->SendForm (

-                             FormBrowser2,

-                             &(HiiHandle[DISPLAY_ONLY_MY_ITEM]),

-                             1,

-                             NULL,

-                             0,

-                             NULL,

-                             NULL

-                             );

-

-    HiiRemovePackages (HiiHandle[0]);

-

-    HiiRemovePackages (HiiHandle[1]);

-  }

-

-  return EFI_SUCCESS;

-}

-

-/**

-  Unloads the application and its installed protocol.

-

-  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.

-

-  @retval EFI_SUCCESS           The image has been unloaded.

-**/

-EFI_STATUS

-EFIAPI

-DriverSampleUnload (

-  IN EFI_HANDLE  ImageHandle

-  )

-{

-  UINTN  Index;

-

-  ASSERT (mPrivateData != NULL);

-

-  if (DriverHandle[0] != NULL) {

-    gBS->UninstallMultipleProtocolInterfaces (

-           DriverHandle[0],

-           &gEfiDevicePathProtocolGuid,

-           &mHiiVendorDevicePath0,

-           &gEfiHiiConfigAccessProtocolGuid,

-           &mPrivateData->ConfigAccess,

-           NULL

-           );

-    DriverHandle[0] = NULL;

-  }

-

-  if (DriverHandle[1] != NULL) {

-    gBS->UninstallMultipleProtocolInterfaces (

-           DriverHandle[1],

-           &gEfiDevicePathProtocolGuid,

-           &mHiiVendorDevicePath1,

-           &gEfiHiiConfigAccessProtocolGuid,

-           &mPrivateData->ConfigAccess,

-           NULL

-           );

-    DriverHandle[1] = NULL;

-  }

-

-  if (mPrivateData->HiiHandle[0] != NULL) {

-    HiiRemovePackages (mPrivateData->HiiHandle[0]);

-  }

-

-  if (mPrivateData->HiiHandle[1] != NULL) {

-    HiiRemovePackages (mPrivateData->HiiHandle[1]);

-  }

-

-  for (Index = 0; Index < NAME_VALUE_NAME_NUMBER; Index++) {

-    if (mPrivateData->NameValueName[Index] != NULL) {

-      FreePool (mPrivateData->NameValueName[Index]);

-    }

-  }

-

-  FreePool (mPrivateData);

-  mPrivateData = NULL;

-

-  gBS->CloseEvent (mEvent);

-

-  return EFI_SUCCESS;

-}

+/** @file
+This is an example of how a driver might export data to the HII protocol to be
+later utilized by the Setup Protocol
+
+Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "DriverSample.h"
+
+#define DISPLAY_ONLY_MY_ITEM  0x0002
+
+CHAR16  VariableName[]  = L"MyIfrNVData";
+CHAR16  MyEfiVar[]      = L"MyEfiVar";
+CHAR16  MyEfiBitVar[]   = L"MyEfiBitVar";
+CHAR16  MyEfiUnionVar[] = L"MyEfiUnionVar";
+
+EFI_HANDLE                  DriverHandle[2] = { NULL, NULL };
+DRIVER_SAMPLE_PRIVATE_DATA  *mPrivateData   = NULL;
+EFI_EVENT                   mEvent;
+
+HII_VENDOR_DEVICE_PATH  mHiiVendorDevicePath0 = {
+  {
+    {
+      HARDWARE_DEVICE_PATH,
+      HW_VENDOR_DP,
+      {
+        (UINT8)(sizeof (VENDOR_DEVICE_PATH)),
+        (UINT8)((sizeof (VENDOR_DEVICE_PATH)) >> 8)
+      }
+    },
+    DRIVER_SAMPLE_FORMSET_GUID
+  },
+  {
+    END_DEVICE_PATH_TYPE,
+    END_ENTIRE_DEVICE_PATH_SUBTYPE,
+    {
+      (UINT8)(END_DEVICE_PATH_LENGTH),
+      (UINT8)((END_DEVICE_PATH_LENGTH) >> 8)
+    }
+  }
+};
+
+HII_VENDOR_DEVICE_PATH  mHiiVendorDevicePath1 = {
+  {
+    {
+      HARDWARE_DEVICE_PATH,
+      HW_VENDOR_DP,
+      {
+        (UINT8)(sizeof (VENDOR_DEVICE_PATH)),
+        (UINT8)((sizeof (VENDOR_DEVICE_PATH)) >> 8)
+      }
+    },
+    DRIVER_SAMPLE_INVENTORY_GUID
+  },
+  {
+    END_DEVICE_PATH_TYPE,
+    END_ENTIRE_DEVICE_PATH_SUBTYPE,
+    {
+      (UINT8)(END_DEVICE_PATH_LENGTH),
+      (UINT8)((END_DEVICE_PATH_LENGTH) >> 8)
+    }
+  }
+};
+
+/**
+  Set value of a data element in an Array by its Index.
+
+  @param  Array                  The data array.
+  @param  Type                   Type of the data in this array.
+  @param  Index                  Zero based index for data in this array.
+  @param  Value                  The value to be set.
+
+**/
+VOID
+SetArrayData (
+  IN VOID    *Array,
+  IN UINT8   Type,
+  IN UINTN   Index,
+  IN UINT64  Value
+  )
+{
+  ASSERT (Array != NULL);
+
+  switch (Type) {
+    case EFI_IFR_TYPE_NUM_SIZE_8:
+      *(((UINT8 *)Array) + Index) = (UINT8)Value;
+      break;
+
+    case EFI_IFR_TYPE_NUM_SIZE_16:
+      *(((UINT16 *)Array) + Index) = (UINT16)Value;
+      break;
+
+    case EFI_IFR_TYPE_NUM_SIZE_32:
+      *(((UINT32 *)Array) + Index) = (UINT32)Value;
+      break;
+
+    case EFI_IFR_TYPE_NUM_SIZE_64:
+      *(((UINT64 *)Array) + Index) = (UINT64)Value;
+      break;
+
+    default:
+      break;
+  }
+}
+
+/**
+  Notification function for keystrokes.
+
+  @param[in] KeyData    The key that was pressed.
+
+  @retval EFI_SUCCESS   The operation was successful.
+**/
+EFI_STATUS
+EFIAPI
+NotificationFunction (
+  IN EFI_KEY_DATA  *KeyData
+  )
+{
+  gBS->SignalEvent (mEvent);
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Function to start monitoring for CTRL-C using SimpleTextInputEx.
+
+  @retval EFI_SUCCESS           The feature is enabled.
+  @retval EFI_OUT_OF_RESOURCES  There is not enough mnemory available.
+**/
+EFI_STATUS
+EFIAPI
+InternalStartMonitor (
+  VOID
+  )
+{
+  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *SimpleEx;
+  EFI_KEY_DATA                       KeyData;
+  EFI_STATUS                         Status;
+  EFI_HANDLE                         *Handles;
+  UINTN                              HandleCount;
+  UINTN                              HandleIndex;
+  VOID                               *NotifyHandle;
+
+  Status = gBS->LocateHandleBuffer (
+                  ByProtocol,
+                  &gEfiSimpleTextInputExProtocolGuid,
+                  NULL,
+                  &HandleCount,
+                  &Handles
+                  );
+  for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {
+    Status = gBS->HandleProtocol (Handles[HandleIndex], &gEfiSimpleTextInputExProtocolGuid, (VOID **)&SimpleEx);
+    ASSERT_EFI_ERROR (Status);
+
+    KeyData.KeyState.KeyToggleState = 0;
+    KeyData.Key.ScanCode            = 0;
+    KeyData.KeyState.KeyShiftState  = EFI_SHIFT_STATE_VALID|EFI_LEFT_CONTROL_PRESSED;
+    KeyData.Key.UnicodeChar         = L'c';
+
+    Status = SimpleEx->RegisterKeyNotify (
+                         SimpleEx,
+                         &KeyData,
+                         NotificationFunction,
+                         &NotifyHandle
+                         );
+    if (EFI_ERROR (Status)) {
+      break;
+    }
+
+    KeyData.KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID|EFI_RIGHT_CONTROL_PRESSED;
+    Status                         = SimpleEx->RegisterKeyNotify (
+                                                 SimpleEx,
+                                                 &KeyData,
+                                                 NotificationFunction,
+                                                 &NotifyHandle
+                                                 );
+    if (EFI_ERROR (Status)) {
+      break;
+    }
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Function to stop monitoring for CTRL-C using SimpleTextInputEx.
+
+  @retval EFI_SUCCESS           The feature is enabled.
+  @retval EFI_OUT_OF_RESOURCES  There is not enough mnemory available.
+**/
+EFI_STATUS
+EFIAPI
+InternalStopMonitor (
+  VOID
+  )
+{
+  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *SimpleEx;
+  EFI_STATUS                         Status;
+  EFI_HANDLE                         *Handles;
+  EFI_KEY_DATA                       KeyData;
+  UINTN                              HandleCount;
+  UINTN                              HandleIndex;
+  VOID                               *NotifyHandle;
+
+  Status = gBS->LocateHandleBuffer (
+                  ByProtocol,
+                  &gEfiSimpleTextInputExProtocolGuid,
+                  NULL,
+                  &HandleCount,
+                  &Handles
+                  );
+  for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {
+    Status = gBS->HandleProtocol (Handles[HandleIndex], &gEfiSimpleTextInputExProtocolGuid, (VOID **)&SimpleEx);
+    ASSERT_EFI_ERROR (Status);
+
+    KeyData.KeyState.KeyToggleState = 0;
+    KeyData.Key.ScanCode            = 0;
+    KeyData.KeyState.KeyShiftState  = EFI_SHIFT_STATE_VALID|EFI_LEFT_CONTROL_PRESSED;
+    KeyData.Key.UnicodeChar         = L'c';
+
+    Status = SimpleEx->RegisterKeyNotify (
+                         SimpleEx,
+                         &KeyData,
+                         NotificationFunction,
+                         &NotifyHandle
+                         );
+    if (!EFI_ERROR (Status)) {
+      Status = SimpleEx->UnregisterKeyNotify (SimpleEx, NotifyHandle);
+    }
+
+    KeyData.KeyState.KeyShiftState = EFI_SHIFT_STATE_VALID|EFI_RIGHT_CONTROL_PRESSED;
+    Status                         = SimpleEx->RegisterKeyNotify (
+                                                 SimpleEx,
+                                                 &KeyData,
+                                                 NotificationFunction,
+                                                 &NotifyHandle
+                                                 );
+    if (!EFI_ERROR (Status)) {
+      Status = SimpleEx->UnregisterKeyNotify (SimpleEx, NotifyHandle);
+    }
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+ Update names of Name/Value storage to current language.
+
+ @param PrivateData   Points to the driver private data.
+
+ @retval EFI_SUCCESS   All names are successfully updated.
+ @retval EFI_NOT_FOUND Failed to get Name from HII database.
+
+**/
+EFI_STATUS
+LoadNameValueNames (
+  IN DRIVER_SAMPLE_PRIVATE_DATA  *PrivateData
+  )
+{
+  UINTN  Index;
+
+  //
+  // Get Name/Value name string of current language
+  //
+  for (Index = 0; Index < NAME_VALUE_NAME_NUMBER; Index++) {
+    PrivateData->NameValueName[Index] = HiiGetString (
+                                          PrivateData->HiiHandle[0],
+                                          PrivateData->NameStringId[Index],
+                                          NULL
+                                          );
+    if (PrivateData->NameValueName[Index] == NULL) {
+      return EFI_NOT_FOUND;
+    }
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Get the value of <Number> in <BlockConfig> format, i.e. the value of OFFSET
+  or WIDTH or VALUE.
+  <BlockConfig> ::= 'OFFSET='<Number>&'WIDTH='<Number>&'VALUE'=<Number>
+
+  This is a internal function.
+
+  @param  StringPtr              String in <BlockConfig> format and points to the
+                                 first character of <Number>.
+  @param  Number                 The output value. Caller takes the responsibility
+                                 to free memory.
+  @param  Len                    Length of the <Number>, in characters.
+
+  @retval EFI_OUT_OF_RESOURCES   Insufficient resources to store neccessary
+                                 structures.
+  @retval EFI_SUCCESS            Value of <Number> is outputted in Number
+                                 successfully.
+
+**/
+EFI_STATUS
+GetValueOfNumber (
+  IN EFI_STRING  StringPtr,
+  OUT UINT8      **Number,
+  OUT UINTN      *Len
+  )
+{
+  EFI_STRING  TmpPtr;
+  UINTN       Length;
+  EFI_STRING  Str;
+  UINT8       *Buf;
+  EFI_STATUS  Status;
+  UINT8       DigitUint8;
+  UINTN       Index;
+  CHAR16      TemStr[2];
+
+  if ((StringPtr == NULL) || (*StringPtr == L'\0') || (Number == NULL) || (Len == NULL)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Buf = NULL;
+
+  TmpPtr = StringPtr;
+  while (*StringPtr != L'\0' && *StringPtr != L'&') {
+    StringPtr++;
+  }
+
+  *Len   = StringPtr - TmpPtr;
+  Length = *Len + 1;
+
+  Str = (EFI_STRING)AllocateZeroPool (Length * sizeof (CHAR16));
+  if (Str == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Exit;
+  }
+
+  CopyMem (Str, TmpPtr, *Len * sizeof (CHAR16));
+  *(Str + *Len) = L'\0';
+
+  Length = (Length + 1) / 2;
+  Buf    = (UINT8 *)AllocateZeroPool (Length);
+  if (Buf == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Exit;
+  }
+
+  Length = *Len;
+  ZeroMem (TemStr, sizeof (TemStr));
+  for (Index = 0; Index < Length; Index++) {
+    TemStr[0]  = Str[Length - Index - 1];
+    DigitUint8 = (UINT8)StrHexToUint64 (TemStr);
+    if ((Index & 1) == 0) {
+      Buf[Index/2] = DigitUint8;
+    } else {
+      Buf[Index/2] = (UINT8)((DigitUint8 << 4) + Buf[Index/2]);
+    }
+  }
+
+  *Number = Buf;
+  Status  = EFI_SUCCESS;
+
+Exit:
+  if (Str != NULL) {
+    FreePool (Str);
+  }
+
+  return Status;
+}
+
+/**
+  Create altcfg string.
+
+  @param  Result               The request result string.
+  @param  ConfigHdr            The request head info. <ConfigHdr> format.
+  @param  Offset               The offset of the parameter int he structure.
+  @param  Width                The width of the parameter.
+
+
+  @retval  The string with altcfg info append at the end.
+**/
+EFI_STRING
+CreateAltCfgString (
+  IN     EFI_STRING  Result,
+  IN     EFI_STRING  ConfigHdr,
+  IN     UINTN       Offset,
+  IN     UINTN       Width
+  )
+{
+  EFI_STRING  StringPtr;
+  EFI_STRING  TmpStr;
+  UINTN       NewLen;
+
+  NewLen = StrLen (Result);
+  //
+  // String Len = ConfigResp + AltConfig + AltConfig + 1("\0")
+  //
+  NewLen    = (NewLen + ((1 + StrLen (ConfigHdr) + 8 + 4) + (8 + 4 + 7 + 4 + 7 + 4)) * 2 + 1) * sizeof (CHAR16);
+  StringPtr = AllocateZeroPool (NewLen);
+  if (StringPtr == NULL) {
+    return NULL;
+  }
+
+  TmpStr = StringPtr;
+  if (Result != NULL) {
+    StrCpyS (StringPtr, NewLen / sizeof (CHAR16), Result);
+    StringPtr += StrLen (Result);
+    FreePool (Result);
+  }
+
+  UnicodeSPrint (
+    StringPtr,
+    (1 + StrLen (ConfigHdr) + 8 + 4 + 1) * sizeof (CHAR16),
+    L"&%s&ALTCFG=%04x",
+    ConfigHdr,
+    EFI_HII_DEFAULT_CLASS_STANDARD
+    );
+  StringPtr += StrLen (StringPtr);
+
+  UnicodeSPrint (
+    StringPtr,
+    (8 + 4 + 7 + 4 + 7 + 4 + 1) * sizeof (CHAR16),
+    L"&OFFSET=%04x&WIDTH=%04x&VALUE=%04x",
+    Offset,
+    Width,
+    DEFAULT_CLASS_STANDARD_VALUE
+    );
+  StringPtr += StrLen (StringPtr);
+
+  UnicodeSPrint (
+    StringPtr,
+    (1 + StrLen (ConfigHdr) + 8 + 4 + 1) * sizeof (CHAR16),
+    L"&%s&ALTCFG=%04x",
+    ConfigHdr,
+    EFI_HII_DEFAULT_CLASS_MANUFACTURING
+    );
+  StringPtr += StrLen (StringPtr);
+
+  UnicodeSPrint (
+    StringPtr,
+    (8 + 4 + 7 + 4 + 7 + 4 + 1) * sizeof (CHAR16),
+    L"&OFFSET=%04x&WIDTH=%04x&VALUE=%04x",
+    Offset,
+    Width,
+    DEFAULT_CLASS_MANUFACTURING_VALUE
+    );
+  StringPtr += StrLen (StringPtr);
+
+  return TmpStr;
+}
+
+/**
+  Check whether need to add the altcfg string. if need to add, add the altcfg
+  string.
+
+  @param  RequestResult              The request result string.
+  @param  ConfigRequestHdr           The request head info. <ConfigHdr> format.
+
+**/
+VOID
+AppendAltCfgString (
+  IN OUT EFI_STRING  *RequestResult,
+  IN     EFI_STRING  ConfigRequestHdr
+  )
+{
+  EFI_STRING  StringPtr;
+  UINTN       Length;
+  UINT8       *TmpBuffer;
+  UINTN       Offset;
+  UINTN       Width;
+  UINTN       BlockSize;
+  UINTN       ValueOffset;
+  UINTN       ValueWidth;
+  EFI_STATUS  Status;
+
+  TmpBuffer   = NULL;
+  StringPtr   = *RequestResult;
+  StringPtr   = StrStr (StringPtr, L"OFFSET");
+  BlockSize   = sizeof (DRIVER_SAMPLE_CONFIGURATION);
+  ValueOffset = OFFSET_OF (DRIVER_SAMPLE_CONFIGURATION, GetDefaultValueFromAccess);
+  ValueWidth  = sizeof (((DRIVER_SAMPLE_CONFIGURATION *)0)->GetDefaultValueFromAccess);
+
+  if (StringPtr == NULL) {
+    return;
+  }
+
+  while (*StringPtr != 0 && StrnCmp (StringPtr, L"OFFSET=", StrLen (L"OFFSET=")) == 0) {
+    StringPtr += StrLen (L"OFFSET=");
+    //
+    // Get Offset
+    //
+    Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);
+    if (EFI_ERROR (Status)) {
+      return;
+    }
+
+    Offset = 0;
+    CopyMem (
+      &Offset,
+      TmpBuffer,
+      (((Length + 1) / 2) < sizeof (UINTN)) ? ((Length + 1) / 2) : sizeof (UINTN)
+      );
+    FreePool (TmpBuffer);
+
+    StringPtr += Length;
+    if (StrnCmp (StringPtr, L"&WIDTH=", StrLen (L"&WIDTH=")) != 0) {
+      return;
+    }
+
+    StringPtr += StrLen (L"&WIDTH=");
+
+    //
+    // Get Width
+    //
+    Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);
+    if (EFI_ERROR (Status)) {
+      return;
+    }
+
+    Width = 0;
+    CopyMem (
+      &Width,
+      TmpBuffer,
+      (((Length + 1) / 2) < sizeof (UINTN)) ? ((Length + 1) / 2) : sizeof (UINTN)
+      );
+    FreePool (TmpBuffer);
+
+    StringPtr += Length;
+    if (StrnCmp (StringPtr, L"&VALUE=", StrLen (L"&VALUE=")) != 0) {
+      return;
+    }
+
+    StringPtr += StrLen (L"&VALUE=");
+
+    //
+    // Get Value
+    //
+    Status = GetValueOfNumber (StringPtr, &TmpBuffer, &Length);
+    if (EFI_ERROR (Status)) {
+      return;
+    }
+
+    StringPtr += Length;
+
+    //
+    // Skip the character "&" before "OFFSET".
+    //
+    StringPtr++;
+
+    //
+    // Calculate Value and convert it to hex string.
+    //
+    if (Offset + Width > BlockSize) {
+      return;
+    }
+
+    if ((Offset <= ValueOffset) && (Offset + Width >= ValueOffset + ValueWidth)) {
+      *RequestResult = CreateAltCfgString (*RequestResult, ConfigRequestHdr, ValueOffset, ValueWidth);
+      return;
+    }
+  }
+}
+
+/**
+  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
+ExtractConfig (
+  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL  *This,
+  IN  CONST EFI_STRING                      Request,
+  OUT EFI_STRING                            *Progress,
+  OUT EFI_STRING                            *Results
+  )
+{
+  EFI_STATUS                       Status;
+  UINTN                            BufferSize;
+  DRIVER_SAMPLE_PRIVATE_DATA       *PrivateData;
+  EFI_HII_CONFIG_ROUTING_PROTOCOL  *HiiConfigRouting;
+  EFI_STRING                       ConfigRequest;
+  EFI_STRING                       ConfigRequestHdr;
+  UINTN                            Size;
+  EFI_STRING                       Value;
+  UINTN                            ValueStrLen;
+  CHAR16                           BackupChar;
+  CHAR16                           *StrPointer;
+  BOOLEAN                          AllocatedRequest;
+
+  if ((Progress == NULL) || (Results == NULL)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  //
+  // Initialize the local variables.
+  //
+  ConfigRequestHdr = NULL;
+  ConfigRequest    = NULL;
+  Size             = 0;
+  *Progress        = Request;
+  AllocatedRequest = FALSE;
+
+  PrivateData      = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);
+  HiiConfigRouting = PrivateData->HiiConfigRouting;
+
+  //
+  // Get Buffer Storage data from EFI variable.
+  // Try to get the current setting from variable.
+  //
+  BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
+  Status     = gRT->GetVariable (
+                      VariableName,
+                      &gDriverSampleFormSetGuid,
+                      NULL,
+                      &BufferSize,
+                      &PrivateData->Configuration
+                      );
+  if (EFI_ERROR (Status)) {
+    return EFI_NOT_FOUND;
+  }
+
+  if (Request == NULL) {
+    //
+    // Request is set to NULL, construct full request string.
+    //
+
+    //
+    // Allocate and fill a buffer large enough to hold the <ConfigHdr> template
+    // followed by "&OFFSET=0&WIDTH=WWWWWWWWWWWWWWWW" followed by a Null-terminator
+    //
+    ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, VariableName, PrivateData->DriverHandle[0]);
+    Size             = (StrLen (ConfigRequestHdr) + 32 + 1) * sizeof (CHAR16);
+    ConfigRequest    = AllocateZeroPool (Size);
+    ASSERT (ConfigRequest != NULL);
+    AllocatedRequest = TRUE;
+    UnicodeSPrint (ConfigRequest, Size, L"%s&OFFSET=0&WIDTH=%016LX", ConfigRequestHdr, (UINT64)BufferSize);
+    FreePool (ConfigRequestHdr);
+    ConfigRequestHdr = NULL;
+  } else {
+    //
+    // Check routing data in <ConfigHdr>.
+    // Note: if only one Storage is used, then this checking could be skipped.
+    //
+    if (!HiiIsConfigHdrMatch (Request, &gDriverSampleFormSetGuid, NULL)) {
+      return EFI_NOT_FOUND;
+    }
+
+    //
+    // Check whether request for EFI Varstore. EFI varstore get data
+    // through hii database, not support in this path.
+    //
+    if (HiiIsConfigHdrMatch (Request, &gDriverSampleFormSetGuid, MyEfiVar)) {
+      return EFI_UNSUPPORTED;
+    }
+
+    if (HiiIsConfigHdrMatch (Request, &gDriverSampleFormSetGuid, MyEfiBitVar)) {
+      return EFI_UNSUPPORTED;
+    }
+
+    if (HiiIsConfigHdrMatch (Request, &gDriverSampleFormSetGuid, MyEfiUnionVar)) {
+      return EFI_UNSUPPORTED;
+    }
+
+    //
+    // Set Request to the unified request string.
+    //
+    ConfigRequest = Request;
+    //
+    // Check whether Request includes Request Element.
+    //
+    if (StrStr (Request, L"OFFSET") == NULL) {
+      //
+      // Check Request Element does exist in Reques String
+      //
+      StrPointer = StrStr (Request, L"PATH");
+      if (StrPointer == NULL) {
+        return EFI_INVALID_PARAMETER;
+      }
+
+      if (StrStr (StrPointer, L"&") == NULL) {
+        Size          = (StrLen (Request) + 32 + 1) * sizeof (CHAR16);
+        ConfigRequest = AllocateZeroPool (Size);
+        ASSERT (ConfigRequest != NULL);
+        AllocatedRequest = TRUE;
+        UnicodeSPrint (ConfigRequest, Size, L"%s&OFFSET=0&WIDTH=%016LX", Request, (UINT64)BufferSize);
+      }
+    }
+  }
+
+  //
+  // Check if requesting Name/Value storage
+  //
+  if (StrStr (ConfigRequest, L"OFFSET") == NULL) {
+    //
+    // Update Name/Value storage Names
+    //
+    Status = LoadNameValueNames (PrivateData);
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+
+    //
+    // Allocate memory for <ConfigResp>, e.g. Name0=0x11, Name1=0x1234, Name2="ABCD"
+    // <Request>   ::=<ConfigHdr>&Name0&Name1&Name2
+    // <ConfigResp>::=<ConfigHdr>&Name0=11&Name1=1234&Name2=0041004200430044
+    //
+    BufferSize = (StrLen (ConfigRequest) +
+                  1 + sizeof (PrivateData->Configuration.NameValueVar0) * 2 +
+                  1 + sizeof (PrivateData->Configuration.NameValueVar1) * 2 +
+                  1 + sizeof (PrivateData->Configuration.NameValueVar2) * 2 + 1) * sizeof (CHAR16);
+    *Results = AllocateZeroPool (BufferSize);
+    ASSERT (*Results != NULL);
+    StrCpyS (*Results, BufferSize / sizeof (CHAR16), ConfigRequest);
+    Value = *Results;
+
+    //
+    // Append value of NameValueVar0, type is UINT8
+    //
+    if ((Value = StrStr (*Results, PrivateData->NameValueName[0])) != NULL) {
+      Value      += StrLen (PrivateData->NameValueName[0]);
+      ValueStrLen = ((sizeof (PrivateData->Configuration.NameValueVar0) * 2) + 1);
+      CopyMem (Value + ValueStrLen, Value, StrSize (Value));
+
+      BackupChar = Value[ValueStrLen];
+      *Value++   = L'=';
+      UnicodeValueToStringS (
+        Value,
+        BufferSize - ((UINTN)Value - (UINTN)*Results),
+        PREFIX_ZERO | RADIX_HEX,
+        PrivateData->Configuration.NameValueVar0,
+        sizeof (PrivateData->Configuration.NameValueVar0) * 2
+        );
+      Value += StrnLenS (Value, (BufferSize - ((UINTN)Value - (UINTN)*Results)) / sizeof (CHAR16));
+      *Value = BackupChar;
+    }
+
+    //
+    // Append value of NameValueVar1, type is UINT16
+    //
+    if ((Value = StrStr (*Results, PrivateData->NameValueName[1])) != NULL) {
+      Value      += StrLen (PrivateData->NameValueName[1]);
+      ValueStrLen = ((sizeof (PrivateData->Configuration.NameValueVar1) * 2) + 1);
+      CopyMem (Value + ValueStrLen, Value, StrSize (Value));
+
+      BackupChar = Value[ValueStrLen];
+      *Value++   = L'=';
+      UnicodeValueToStringS (
+        Value,
+        BufferSize - ((UINTN)Value - (UINTN)*Results),
+        PREFIX_ZERO | RADIX_HEX,
+        PrivateData->Configuration.NameValueVar1,
+        sizeof (PrivateData->Configuration.NameValueVar1) * 2
+        );
+      Value += StrnLenS (Value, (BufferSize - ((UINTN)Value - (UINTN)*Results)) / sizeof (CHAR16));
+      *Value = BackupChar;
+    }
+
+    //
+    // Append value of NameValueVar2, type is CHAR16 *
+    //
+    if ((Value = StrStr (*Results, PrivateData->NameValueName[2])) != NULL) {
+      Value      += StrLen (PrivateData->NameValueName[2]);
+      ValueStrLen = StrLen (PrivateData->Configuration.NameValueVar2) * 4 + 1;
+      CopyMem (Value + ValueStrLen, Value, StrSize (Value));
+
+      *Value++ = L'=';
+      //
+      // Convert Unicode String to Config String, e.g. "ABCD" => "0041004200430044"
+      //
+      StrPointer = (CHAR16 *)PrivateData->Configuration.NameValueVar2;
+      for ( ; *StrPointer != L'\0'; StrPointer++) {
+        UnicodeValueToStringS (
+          Value,
+          BufferSize - ((UINTN)Value - (UINTN)*Results),
+          PREFIX_ZERO | RADIX_HEX,
+          *StrPointer,
+          4
+          );
+        Value += StrnLenS (Value, (BufferSize - ((UINTN)Value - (UINTN)*Results)) / sizeof (CHAR16));
+      }
+    }
+
+    Status = EFI_SUCCESS;
+  } else {
+    //
+    // Convert buffer data to <ConfigResp> by helper function BlockToConfig()
+    //
+    Status = HiiConfigRouting->BlockToConfig (
+                                 HiiConfigRouting,
+                                 ConfigRequest,
+                                 (UINT8 *)&PrivateData->Configuration,
+                                 BufferSize,
+                                 Results,
+                                 Progress
+                                 );
+    if (!EFI_ERROR (Status)) {
+      ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, VariableName, PrivateData->DriverHandle[0]);
+      AppendAltCfgString (Results, ConfigRequestHdr);
+    }
+  }
+
+  //
+  // Free the allocated config request string.
+  //
+  if (AllocatedRequest) {
+    FreePool (ConfigRequest);
+  }
+
+  if (ConfigRequestHdr != NULL) {
+    FreePool (ConfigRequestHdr);
+  }
+
+  //
+  // Set Progress string to the original request string.
+  //
+  if (Request == NULL) {
+    *Progress = NULL;
+  } else if (StrStr (Request, L"OFFSET") == NULL) {
+    *Progress = Request + StrLen (Request);
+  }
+
+  return Status;
+}
+
+/**
+  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.
+  @retval EFI_DEVICE_ERROR       If value is 44, return error for testing.
+
+**/
+EFI_STATUS
+EFIAPI
+RouteConfig (
+  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL  *This,
+  IN  CONST EFI_STRING                      Configuration,
+  OUT EFI_STRING                            *Progress
+  )
+{
+  EFI_STATUS                       Status;
+  UINTN                            BufferSize;
+  DRIVER_SAMPLE_PRIVATE_DATA       *PrivateData;
+  EFI_HII_CONFIG_ROUTING_PROTOCOL  *HiiConfigRouting;
+  CHAR16                           *Value;
+  CHAR16                           *StrPtr;
+  CHAR16                           TemStr[5];
+  UINT8                            *DataBuffer;
+  UINT8                            DigitUint8;
+  UINTN                            Index;
+  CHAR16                           *StrBuffer;
+
+  if ((Configuration == NULL) || (Progress == NULL)) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  PrivateData      = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);
+  HiiConfigRouting = PrivateData->HiiConfigRouting;
+  *Progress        = Configuration;
+
+  //
+  // Check routing data in <ConfigHdr>.
+  // Note: if only one Storage is used, then this checking could be skipped.
+  //
+  if (!HiiIsConfigHdrMatch (Configuration, &gDriverSampleFormSetGuid, NULL)) {
+    return EFI_NOT_FOUND;
+  }
+
+  //
+  // Check whether request for EFI Varstore. EFI varstore get data
+  // through hii database, not support in this path.
+  //
+  if (HiiIsConfigHdrMatch (Configuration, &gDriverSampleFormSetGuid, MyEfiVar)) {
+    return EFI_UNSUPPORTED;
+  }
+
+  if (HiiIsConfigHdrMatch (Configuration, &gDriverSampleFormSetGuid, MyEfiBitVar)) {
+    return EFI_UNSUPPORTED;
+  }
+
+  if (HiiIsConfigHdrMatch (Configuration, &gDriverSampleFormSetGuid, MyEfiUnionVar)) {
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // Get Buffer Storage data from EFI variable
+  //
+  BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
+  Status     = gRT->GetVariable (
+                      VariableName,
+                      &gDriverSampleFormSetGuid,
+                      NULL,
+                      &BufferSize,
+                      &PrivateData->Configuration
+                      );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  //
+  // Check if configuring Name/Value storage
+  //
+  if (StrStr (Configuration, L"OFFSET") == NULL) {
+    //
+    // Update Name/Value storage Names
+    //
+    Status = LoadNameValueNames (PrivateData);
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+
+    //
+    // Convert value for NameValueVar0
+    //
+    if ((Value = StrStr (Configuration, PrivateData->NameValueName[0])) != NULL) {
+      //
+      // Skip "Name="
+      //
+      Value += StrLen (PrivateData->NameValueName[0]);
+      Value++;
+      //
+      // Get Value String
+      //
+      StrPtr = StrStr (Value, L"&");
+      if (StrPtr == NULL) {
+        StrPtr = Value + StrLen (Value);
+      }
+
+      //
+      // Convert Value to Buffer data
+      //
+      DataBuffer = (UINT8 *)&PrivateData->Configuration.NameValueVar0;
+      ZeroMem (TemStr, sizeof (TemStr));
+      for (Index = 0, StrPtr--; StrPtr >= Value; StrPtr--, Index++) {
+        TemStr[0]  = *StrPtr;
+        DigitUint8 = (UINT8)StrHexToUint64 (TemStr);
+        if ((Index & 1) == 0) {
+          DataBuffer[Index/2] = DigitUint8;
+        } else {
+          DataBuffer[Index/2] = (UINT8)((UINT8)(DigitUint8 << 4) + DataBuffer[Index/2]);
+        }
+      }
+    }
+
+    //
+    // Convert value for NameValueVar1
+    //
+    if ((Value = StrStr (Configuration, PrivateData->NameValueName[1])) != NULL) {
+      //
+      // Skip "Name="
+      //
+      Value += StrLen (PrivateData->NameValueName[1]);
+      Value++;
+      //
+      // Get Value String
+      //
+      StrPtr = StrStr (Value, L"&");
+      if (StrPtr == NULL) {
+        StrPtr = Value + StrLen (Value);
+      }
+
+      //
+      // Convert Value to Buffer data
+      //
+      DataBuffer = (UINT8 *)&PrivateData->Configuration.NameValueVar1;
+      ZeroMem (TemStr, sizeof (TemStr));
+      for (Index = 0, StrPtr--; StrPtr >= Value; StrPtr--, Index++) {
+        TemStr[0]  = *StrPtr;
+        DigitUint8 = (UINT8)StrHexToUint64 (TemStr);
+        if ((Index & 1) == 0) {
+          DataBuffer[Index/2] = DigitUint8;
+        } else {
+          DataBuffer[Index/2] = (UINT8)((UINT8)(DigitUint8 << 4) + DataBuffer[Index/2]);
+        }
+      }
+    }
+
+    //
+    // Convert value for NameValueVar2
+    //
+    if ((Value = StrStr (Configuration, PrivateData->NameValueName[2])) != NULL) {
+      //
+      // Skip "Name="
+      //
+      Value += StrLen (PrivateData->NameValueName[2]);
+      Value++;
+      //
+      // Get Value String
+      //
+      StrPtr = StrStr (Value, L"&");
+      if (StrPtr == NULL) {
+        StrPtr = Value + StrLen (Value);
+      }
+
+      //
+      // Convert Config String to Unicode String, e.g "0041004200430044" => "ABCD"
+      //
+      StrBuffer = (CHAR16 *)PrivateData->Configuration.NameValueVar2;
+      ZeroMem (TemStr, sizeof (TemStr));
+      while (Value < StrPtr) {
+        StrnCpyS (TemStr, sizeof (TemStr) / sizeof (CHAR16), Value, 4);
+        *(StrBuffer++) = (CHAR16)StrHexToUint64 (TemStr);
+        Value         += 4;
+      }
+
+      *StrBuffer = L'\0';
+    }
+
+    //
+    // Store Buffer Storage back to EFI variable
+    //
+    Status = gRT->SetVariable (
+                    VariableName,
+                    &gDriverSampleFormSetGuid,
+                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                    sizeof (DRIVER_SAMPLE_CONFIGURATION),
+                    &PrivateData->Configuration
+                    );
+
+    return Status;
+  }
+
+  //
+  // Convert <ConfigResp> to buffer data by helper function ConfigToBlock()
+  //
+  BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
+  Status     = HiiConfigRouting->ConfigToBlock (
+                                   HiiConfigRouting,
+                                   Configuration,
+                                   (UINT8 *)&PrivateData->Configuration,
+                                   &BufferSize,
+                                   Progress
+                                   );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  if (PrivateData->Configuration.QuestionApply == 44) {
+    // Return error for verify the error handling of caller.
+    return EFI_DEVICE_ERROR;
+  }
+
+  //
+  // Store Buffer Storage back to EFI variable
+  //
+  Status = gRT->SetVariable (
+                  VariableName,
+                  &gDriverSampleFormSetGuid,
+                  EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                  sizeof (DRIVER_SAMPLE_CONFIGURATION),
+                  &PrivateData->Configuration
+                  );
+
+  return Status;
+}
+
+/**
+  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
+DriverCallback (
+  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
+  )
+{
+  DRIVER_SAMPLE_PRIVATE_DATA   *PrivateData;
+  EFI_STATUS                   Status;
+  VOID                         *StartOpCodeHandle;
+  VOID                         *OptionsOpCodeHandle;
+  EFI_IFR_GUID_LABEL           *StartLabel;
+  VOID                         *EndOpCodeHandle;
+  EFI_IFR_GUID_LABEL           *EndLabel;
+  EFI_INPUT_KEY                Key;
+  DRIVER_SAMPLE_CONFIGURATION  *Configuration;
+  MY_EFI_VARSTORE_DATA         *EfiData;
+  EFI_FORM_ID                  FormId;
+  EFI_STRING                   Progress;
+  EFI_STRING                   Results;
+  UINT32                       ProgressErr;
+  CHAR16                       *TmpStr;
+  UINTN                        Index;
+  UINT64                       BufferValue;
+  EFI_HII_POPUP_SELECTION      UserSelection;
+
+  UserSelection = 0xFF;
+
+  if (((Value == NULL) && (Action != EFI_BROWSER_ACTION_FORM_OPEN) && (Action != EFI_BROWSER_ACTION_FORM_CLOSE)) ||
+      (ActionRequest == NULL))
+  {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  FormId      = 0;
+  ProgressErr = 0;
+  Status      = EFI_SUCCESS;
+  BufferValue = 3;
+  PrivateData = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);
+
+  switch (Action) {
+    case EFI_BROWSER_ACTION_FORM_OPEN:
+    {
+      if (QuestionId == 0x1234) {
+        //
+        // Sample CallBack for UEFI FORM_OPEN action:
+        //   Add Save action into Form 3 when Form 1 is opened.
+        //   This will be done only in FORM_OPEN CallBack of question with ID 0x1234 from Form 1.
+        //
+        PrivateData = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);
+
+        //
+        // Initialize the container for dynamic opcodes
+        //
+        StartOpCodeHandle = HiiAllocateOpCodeHandle ();
+        ASSERT (StartOpCodeHandle != 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_UPDATE2;
+
+        HiiCreateActionOpCode (
+          StartOpCodeHandle,                // Container for dynamic created opcodes
+          0x1238,                           // Question ID
+          STRING_TOKEN (STR_SAVE_TEXT),     // Prompt text
+          STRING_TOKEN (STR_SAVE_TEXT),     // Help text
+          EFI_IFR_FLAG_CALLBACK,            // Question flag
+          0                                 // Action String ID
+          );
+
+        HiiUpdateForm (
+          PrivateData->HiiHandle[0],  // HII handle
+          &gDriverSampleFormSetGuid,  // Formset GUID
+          0x3,                        // Form ID
+          StartOpCodeHandle,          // Label for where to insert opcodes
+          NULL                        // Insert data
+          );
+
+        HiiFreeOpCodeHandle (StartOpCodeHandle);
+      }
+
+      if (QuestionId == 0x1247) {
+        Status = InternalStartMonitor ();
+        ASSERT_EFI_ERROR (Status);
+      }
+
+      break;
+    }
+
+    case EFI_BROWSER_ACTION_FORM_CLOSE:
+    {
+      if (QuestionId == 0x5678) {
+        //
+        // Sample CallBack for UEFI FORM_CLOSE action:
+        //   Show up a pop-up to specify Form 3 will be closed when exit Form 3.
+        //
+        do {
+          CreatePopUp (
+            EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
+            &Key,
+            L"",
+            L"You are going to leave third Form!",
+            L"Press ESC or ENTER to continue ...",
+            L"",
+            NULL
+            );
+        } while ((Key.ScanCode != SCAN_ESC) && (Key.UnicodeChar != CHAR_CARRIAGE_RETURN));
+      }
+
+      if (QuestionId == 0x1247) {
+        Status = InternalStopMonitor ();
+        ASSERT_EFI_ERROR (Status);
+      }
+
+      break;
+    }
+
+    case EFI_BROWSER_ACTION_RETRIEVE:
+    {
+      switch (QuestionId ) {
+        case 0x1248:
+          if (Type != EFI_IFR_TYPE_REF) {
+            return EFI_INVALID_PARAMETER;
+          }
+
+          Value->ref.FormId = 0x3;
+          break;
+
+        case 0x5678:
+        case 0x1247:
+          //
+          // We will reach here once the Question is refreshed
+          //
+
+          //
+          // Initialize the container for dynamic opcodes
+          //
+          StartOpCodeHandle = HiiAllocateOpCodeHandle ();
+          ASSERT (StartOpCodeHandle != 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;
+          if (QuestionId == 0x5678) {
+            StartLabel->Number = LABEL_UPDATE2;
+            FormId             = 0x03;
+            PrivateData->Configuration.DynamicRefresh++;
+          } else if (QuestionId == 0x1247 ) {
+            StartLabel->Number = LABEL_UPDATE3;
+            FormId             = 0x06;
+            PrivateData->Configuration.RefreshGuidCount++;
+          }
+
+          HiiCreateActionOpCode (
+            StartOpCodeHandle,              // Container for dynamic created opcodes
+            0x1237,                         // Question ID
+            STRING_TOKEN (STR_EXIT_TEXT),   // Prompt text
+            STRING_TOKEN (STR_EXIT_TEXT),   // Help text
+            EFI_IFR_FLAG_CALLBACK,          // Question flag
+            0                               // Action String ID
+            );
+
+          HiiUpdateForm (
+            PrivateData->HiiHandle[0],      // HII handle
+            &gDriverSampleFormSetGuid,      // Formset GUID
+            FormId,                         // Form ID
+            StartOpCodeHandle,              // Label for where to insert opcodes
+            NULL                            // Insert data
+            );
+
+          HiiFreeOpCodeHandle (StartOpCodeHandle);
+
+          //
+          // Refresh the Question value
+          //
+          Status = gRT->SetVariable (
+                          VariableName,
+                          &gDriverSampleFormSetGuid,
+                          EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                          sizeof (DRIVER_SAMPLE_CONFIGURATION),
+                          &PrivateData->Configuration
+                          );
+
+          if (QuestionId == 0x5678) {
+            //
+            // Update uncommitted data of Browser
+            //
+            EfiData = AllocateZeroPool (sizeof (MY_EFI_VARSTORE_DATA));
+            ASSERT (EfiData != NULL);
+            if (HiiGetBrowserData (&gDriverSampleFormSetGuid, MyEfiVar, sizeof (MY_EFI_VARSTORE_DATA), (UINT8 *)EfiData)) {
+              EfiData->Field8 = 111;
+              HiiSetBrowserData (
+                &gDriverSampleFormSetGuid,
+                MyEfiVar,
+                sizeof (MY_EFI_VARSTORE_DATA),
+                (UINT8 *)EfiData,
+                NULL
+                );
+            }
+
+            FreePool (EfiData);
+          }
+
+          break;
+      }
+
+      break;
+    }
+
+    case EFI_BROWSER_ACTION_DEFAULT_STANDARD:
+    {
+      switch (QuestionId) {
+        case 0x1240:
+          Value->u8 = DEFAULT_CLASS_STANDARD_VALUE;
+          break;
+
+        case 0x1252:
+          for (Index = 0; Index < 3; Index++) {
+            SetArrayData (Value, EFI_IFR_TYPE_NUM_SIZE_8, Index, BufferValue--);
+          }
+
+          break;
+
+        case 0x6666:
+          Value->u8 = 12;
+          break;
+
+        default:
+          Status = EFI_UNSUPPORTED;
+          break;
+      }
+
+      break;
+    }
+
+    case EFI_BROWSER_ACTION_DEFAULT_MANUFACTURING:
+    {
+      switch (QuestionId) {
+        case 0x1240:
+          Value->u8 = DEFAULT_CLASS_MANUFACTURING_VALUE;
+          break;
+
+        case 0x6666:
+          Value->u8 = 13;
+          break;
+
+        default:
+          Status = EFI_UNSUPPORTED;
+          break;
+      }
+
+      break;
+    }
+
+    case EFI_BROWSER_ACTION_CHANGING:
+    {
+      switch (QuestionId) {
+        case 0x1249:
+        {
+          if (Type != EFI_IFR_TYPE_REF) {
+            return EFI_INVALID_PARAMETER;
+          }
+
+          Value->ref.FormId = 0x1234;
+          break;
+        }
+        case 0x1234:
+          //
+          // Initialize the container for dynamic opcodes
+          //
+          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_UPDATE1;
+
+          //
+          // 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;
+
+          HiiCreateActionOpCode (
+            StartOpCodeHandle,            // Container for dynamic created opcodes
+            0x1237,                       // Question ID
+            STRING_TOKEN (STR_EXIT_TEXT), // Prompt text
+            STRING_TOKEN (STR_EXIT_TEXT), // Help text
+            EFI_IFR_FLAG_CALLBACK,        // Question flag
+            0                             // Action String ID
+            );
+
+          //
+          // Create Option OpCode
+          //
+          OptionsOpCodeHandle = HiiAllocateOpCodeHandle ();
+          ASSERT (OptionsOpCodeHandle != NULL);
+
+          HiiCreateOneOfOptionOpCode (
+            OptionsOpCodeHandle,
+            STRING_TOKEN (STR_BOOT_OPTION1),
+            0,
+            EFI_IFR_NUMERIC_SIZE_1,
+            1
+            );
+
+          HiiCreateOneOfOptionOpCode (
+            OptionsOpCodeHandle,
+            STRING_TOKEN (STR_BOOT_OPTION2),
+            0,
+            EFI_IFR_NUMERIC_SIZE_1,
+            2
+            );
+
+          //
+          // Prepare initial value for the dynamic created oneof Question
+          //
+          PrivateData->Configuration.DynamicOneof = 2;
+          Status                                  = gRT->SetVariable (
+                                                           VariableName,
+                                                           &gDriverSampleFormSetGuid,
+                                                           EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                                                           sizeof (DRIVER_SAMPLE_CONFIGURATION),
+                                                           &PrivateData->Configuration
+                                                           );
+
+          //
+          // Set initial vlaue of dynamic created oneof Question in Form Browser
+          //
+          Configuration = AllocateZeroPool (sizeof (DRIVER_SAMPLE_CONFIGURATION));
+          ASSERT (Configuration != NULL);
+          if (HiiGetBrowserData (&gDriverSampleFormSetGuid, VariableName, sizeof (DRIVER_SAMPLE_CONFIGURATION), (UINT8 *)Configuration)) {
+            Configuration->DynamicOneof = 2;
+
+            //
+            // Update uncommitted data of Browser
+            //
+            HiiSetBrowserData (
+              &gDriverSampleFormSetGuid,
+              VariableName,
+              sizeof (DRIVER_SAMPLE_CONFIGURATION),
+              (UINT8 *)Configuration,
+              NULL
+              );
+          }
+
+          FreePool (Configuration);
+
+          HiiCreateOneOfOpCode (
+            StartOpCodeHandle,                     // Container for dynamic created opcodes
+            0x8001,                                // Question ID (or call it "key")
+            CONFIGURATION_VARSTORE_ID,             // VarStore ID
+            (UINT16)DYNAMIC_ONE_OF_VAR_OFFSET,     // Offset in Buffer Storage
+            STRING_TOKEN (STR_ONE_OF_PROMPT),      // Question prompt text
+            STRING_TOKEN (STR_ONE_OF_HELP),        // Question help text
+            EFI_IFR_FLAG_CALLBACK,                 // Question flag
+            EFI_IFR_NUMERIC_SIZE_1,                // Data type of Question Value
+            OptionsOpCodeHandle,                   // Option Opcode list
+            NULL                                   // Default Opcode is NULl
+            );
+
+          HiiCreateOrderedListOpCode (
+            StartOpCodeHandle,                       // Container for dynamic created opcodes
+            0x8002,                                  // Question ID
+            CONFIGURATION_VARSTORE_ID,               // VarStore ID
+            (UINT16)DYNAMIC_ORDERED_LIST_VAR_OFFSET, // Offset in Buffer Storage
+            STRING_TOKEN (STR_BOOT_OPTIONS),         // Question prompt text
+            STRING_TOKEN (STR_BOOT_OPTIONS),         // Question help text
+            EFI_IFR_FLAG_RESET_REQUIRED,             // Question flag
+            0,                                       // Ordered list flag, e.g. EFI_IFR_UNIQUE_SET
+            EFI_IFR_NUMERIC_SIZE_1,                  // Data type of Question value
+            5,                                       // Maximum container
+            OptionsOpCodeHandle,                     // Option Opcode list
+            NULL                                     // Default Opcode is NULl
+            );
+
+          HiiCreateTextOpCode (
+            StartOpCodeHandle,
+            STRING_TOKEN (STR_TEXT_SAMPLE_HELP),
+            STRING_TOKEN (STR_TEXT_SAMPLE_HELP),
+            STRING_TOKEN (STR_TEXT_SAMPLE_STRING)
+            );
+
+          HiiCreateDateOpCode (
+            StartOpCodeHandle,
+            0x8004,
+            0x0,
+            0x0,
+            STRING_TOKEN (STR_DATE_SAMPLE_HELP),
+            STRING_TOKEN (STR_DATE_SAMPLE_HELP),
+            0,
+            QF_DATE_STORAGE_TIME,
+            NULL
+            );
+
+          HiiCreateTimeOpCode (
+            StartOpCodeHandle,
+            0x8005,
+            0x0,
+            0x0,
+            STRING_TOKEN (STR_TIME_SAMPLE_HELP),
+            STRING_TOKEN (STR_TIME_SAMPLE_HELP),
+            0,
+            QF_TIME_STORAGE_TIME,
+            NULL
+            );
+
+          HiiCreateGotoOpCode (
+            StartOpCodeHandle,             // Container for dynamic created opcodes
+            1,                             // Target Form ID
+            STRING_TOKEN (STR_GOTO_FORM1), // Prompt text
+            STRING_TOKEN (STR_GOTO_HELP),  // Help text
+            0,                             // Question flag
+            0x8003                         // Question ID
+            );
+
+          HiiUpdateForm (
+            PrivateData->HiiHandle[0], // HII handle
+            &gDriverSampleFormSetGuid, // Formset GUID
+            0x1234,                    // Form ID
+            StartOpCodeHandle,         // Label for where to insert opcodes
+            EndOpCodeHandle            // Replace data
+            );
+
+          HiiFreeOpCodeHandle (StartOpCodeHandle);
+          HiiFreeOpCodeHandle (OptionsOpCodeHandle);
+          HiiFreeOpCodeHandle (EndOpCodeHandle);
+          break;
+
+        default:
+          break;
+      }
+
+      break;
+    }
+
+    case EFI_BROWSER_ACTION_CHANGED:
+      switch (QuestionId) {
+        case 0x1237:
+          //
+          // User press "Exit now", request Browser to exit
+          //
+          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_EXIT;
+          break;
+
+        case 0x1238:
+          //
+          // User press "Save now", request Browser to save the uncommitted data.
+          //
+          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_SUBMIT;
+          break;
+
+        case 0x1241:
+        case 0x1246:
+          //
+          // User press "Submit current form and Exit now", request Browser to submit current form and exit
+          //
+          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT;
+          break;
+
+        case 0x1242:
+          //
+          // User press "Discard current form now", request Browser to discard the uncommitted data.
+          //
+          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD;
+          break;
+
+        case 0x1243:
+          //
+          // User press "Submit current form now", request Browser to save the uncommitted data.
+          //
+          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_APPLY;
+          break;
+
+        case 0x1244:
+        case 0x1245:
+          //
+          // User press "Discard current form and Exit now", request Browser to discard the uncommitted data and exit.
+          //
+          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT;
+          break;
+
+        case 0x1253:
+          //
+          // User change the value of "Question apply test".
+          //
+          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_QUESTION_APPLY;
+          break;
+
+        case 0x1231:
+          //
+          // 1. Check to see whether system support keyword.
+          //
+          Status = PrivateData->HiiKeywordHandler->GetData (
+                                                     PrivateData->HiiKeywordHandler,
+                                                     L"NAMESPACE=x-UEFI-ns",
+                                                     L"KEYWORD=iSCSIBootEnable",
+                                                     &Progress,
+                                                     &ProgressErr,
+                                                     &Results
+                                                     );
+          if (EFI_ERROR (Status)) {
+            do {
+              CreatePopUp (
+                EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
+                &Key,
+                L"",
+                L"This system not support this keyword!",
+                L"Press ENTER to continue ...",
+                L"",
+                NULL
+                );
+            } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);
+
+            Status = EFI_SUCCESS;
+            break;
+          }
+
+          //
+          // 2. If system support this keyword, just try to change value.
+          //
+
+          //
+          // Change value from '0' to '1' or from '1' to '0'
+          //
+          TmpStr = StrStr (Results, L"&VALUE=");
+          ASSERT (TmpStr != NULL);
+          TmpStr += StrLen (L"&VALUE=");
+          TmpStr++;
+          if (*TmpStr == L'0') {
+            *TmpStr = L'1';
+          } else {
+            *TmpStr = L'0';
+          }
+
+          //
+          // 3. Call the keyword handler protocol to change the value.
+          //
+          Status = PrivateData->HiiKeywordHandler->SetData (
+                                                     PrivateData->HiiKeywordHandler,
+                                                     Results,
+                                                     &Progress,
+                                                     &ProgressErr
+                                                     );
+          if (EFI_ERROR (Status)) {
+            do {
+              CreatePopUp (
+                EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
+                &Key,
+                L"",
+                L"Set keyword to the system failed!",
+                L"Press ENTER to continue ...",
+                L"",
+                NULL
+                );
+            } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);
+
+            Status = EFI_SUCCESS;
+            break;
+          }
+
+          break;
+
+        case 0x1330:
+          Status = mPrivateData->HiiPopup->CreatePopup (
+                                             mPrivateData->HiiPopup,
+                                             EfiHiiPopupStyleInfo,
+                                             EfiHiiPopupTypeYesNo,
+                                             mPrivateData->HiiHandle[0],
+                                             STRING_TOKEN (STR_POPUP_STRING),
+                                             &UserSelection
+                                             );
+          if (!EFI_ERROR (Status)) {
+            if (UserSelection == EfiHiiPopupSelectionYes) {
+              *ActionRequest = EFI_BROWSER_ACTION_REQUEST_EXIT;
+            }
+          }
+
+          break;
+
+        default:
+          break;
+      }
+
+      break;
+
+    case EFI_BROWSER_ACTION_SUBMITTED:
+    {
+      if (QuestionId == 0x1250) {
+        //
+        // Sample CallBack for EFI_BROWSER_ACTION_SUBMITTED action:
+        // Show up a pop-up to show SUBMITTED callback has been triggered.
+        //
+        do {
+          CreatePopUp (
+            EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
+            &Key,
+            L"",
+            L"EfiVarstore value has been submitted!",
+            L"Press ESC or ENTER to continue ...",
+            L"",
+            NULL
+            );
+        } while ((Key.ScanCode != SCAN_ESC) && (Key.UnicodeChar != CHAR_CARRIAGE_RETURN));
+      }
+
+      break;
+    }
+
+    default:
+      Status = EFI_UNSUPPORTED;
+      break;
+  }
+
+  return Status;
+}
+
+/**
+  Main entry for this driver.
+
+  @param ImageHandle     Image handle this driver.
+  @param SystemTable     Pointer to SystemTable.
+
+  @retval EFI_SUCESS     This function always complete successfully.
+
+**/
+EFI_STATUS
+EFIAPI
+DriverSampleInit (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS                             Status;
+  EFI_HII_HANDLE                         HiiHandle[2];
+  EFI_SCREEN_DESCRIPTOR                  Screen;
+  EFI_HII_DATABASE_PROTOCOL              *HiiDatabase;
+  EFI_HII_STRING_PROTOCOL                *HiiString;
+  EFI_FORM_BROWSER2_PROTOCOL             *FormBrowser2;
+  EFI_HII_CONFIG_ROUTING_PROTOCOL        *HiiConfigRouting;
+  EFI_CONFIG_KEYWORD_HANDLER_PROTOCOL    *HiiKeywordHandler;
+  EFI_HII_POPUP_PROTOCOL                 *PopupHandler;
+  CHAR16                                 *NewString;
+  UINTN                                  BufferSize;
+  DRIVER_SAMPLE_CONFIGURATION            *Configuration;
+  BOOLEAN                                ActionFlag;
+  EFI_STRING                             ConfigRequestHdr;
+  EFI_STRING                             NameRequestHdr;
+  MY_EFI_VARSTORE_DATA                   *VarStoreConfig;
+  MY_EFI_BITS_VARSTORE_DATA              *BitsVarStoreConfig;
+  MY_EFI_UNION_DATA                      *UnionConfig;
+  EFI_INPUT_KEY                          HotKey;
+  EDKII_FORM_BROWSER_EXTENSION_PROTOCOL  *FormBrowserEx;
+
+  //
+  // Initialize the local variables.
+  //
+  ConfigRequestHdr = NULL;
+  NewString        = NULL;
+
+  //
+  // Initialize screen dimensions for SendForm().
+  // Remove 3 characters from top and bottom
+  //
+  ZeroMem (&Screen, sizeof (EFI_SCREEN_DESCRIPTOR));
+  gST->ConOut->QueryMode (gST->ConOut, gST->ConOut->Mode->Mode, &Screen.RightColumn, &Screen.BottomRow);
+
+  Screen.TopRow    = 3;
+  Screen.BottomRow = Screen.BottomRow - 3;
+
+  //
+  // Initialize driver private data
+  //
+  mPrivateData = AllocateZeroPool (sizeof (DRIVER_SAMPLE_PRIVATE_DATA));
+  if (mPrivateData == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  mPrivateData->Signature = DRIVER_SAMPLE_PRIVATE_SIGNATURE;
+
+  mPrivateData->ConfigAccess.ExtractConfig = ExtractConfig;
+  mPrivateData->ConfigAccess.RouteConfig   = RouteConfig;
+  mPrivateData->ConfigAccess.Callback      = DriverCallback;
+
+  //
+  // Locate Hii Database protocol
+  //
+  Status = gBS->LocateProtocol (&gEfiHiiDatabaseProtocolGuid, NULL, (VOID **)&HiiDatabase);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  mPrivateData->HiiDatabase = HiiDatabase;
+
+  //
+  // Locate HiiString protocol
+  //
+  Status = gBS->LocateProtocol (&gEfiHiiStringProtocolGuid, NULL, (VOID **)&HiiString);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  mPrivateData->HiiString = HiiString;
+
+  //
+  // Locate Formbrowser2 protocol
+  //
+  Status = gBS->LocateProtocol (&gEfiFormBrowser2ProtocolGuid, NULL, (VOID **)&FormBrowser2);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  mPrivateData->FormBrowser2 = FormBrowser2;
+
+  //
+  // Locate ConfigRouting protocol
+  //
+  Status = gBS->LocateProtocol (&gEfiHiiConfigRoutingProtocolGuid, NULL, (VOID **)&HiiConfigRouting);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  mPrivateData->HiiConfigRouting = HiiConfigRouting;
+
+  //
+  // Locate keyword handler protocol
+  //
+  Status = gBS->LocateProtocol (&gEfiConfigKeywordHandlerProtocolGuid, NULL, (VOID **)&HiiKeywordHandler);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  mPrivateData->HiiKeywordHandler = HiiKeywordHandler;
+
+  //
+  // Locate HiiPopup protocol
+  //
+  Status = gBS->LocateProtocol (&gEfiHiiPopupProtocolGuid, NULL, (VOID **)&PopupHandler);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  mPrivateData->HiiPopup = PopupHandler;
+
+  Status = gBS->InstallMultipleProtocolInterfaces (
+                  &DriverHandle[0],
+                  &gEfiDevicePathProtocolGuid,
+                  &mHiiVendorDevicePath0,
+                  &gEfiHiiConfigAccessProtocolGuid,
+                  &mPrivateData->ConfigAccess,
+                  NULL
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  mPrivateData->DriverHandle[0] = DriverHandle[0];
+
+  //
+  // Publish our HII data
+  //
+  HiiHandle[0] = HiiAddPackages (
+                   &gDriverSampleFormSetGuid,
+                   DriverHandle[0],
+                   DriverSampleStrings,
+                   VfrBin,
+                   NULL
+                   );
+  if (HiiHandle[0] == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  mPrivateData->HiiHandle[0] = HiiHandle[0];
+
+  //
+  // Publish another Fromset
+  //
+  Status = gBS->InstallMultipleProtocolInterfaces (
+                  &DriverHandle[1],
+                  &gEfiDevicePathProtocolGuid,
+                  &mHiiVendorDevicePath1,
+                  &gEfiHiiConfigAccessProtocolGuid,
+                  &mPrivateData->ConfigAccess,
+                  NULL
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  mPrivateData->DriverHandle[1] = DriverHandle[1];
+
+  HiiHandle[1] = HiiAddPackages (
+                   &gDriverSampleInventoryGuid,
+                   DriverHandle[1],
+                   DriverSampleStrings,
+                   InventoryBin,
+                   NULL
+                   );
+  if (HiiHandle[1] == NULL) {
+    DriverSampleUnload (ImageHandle);
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  mPrivateData->HiiHandle[1] = HiiHandle[1];
+
+  //
+  // Update the device path string.
+  //
+  NewString = ConvertDevicePathToText ((EFI_DEVICE_PATH_PROTOCOL *)&mHiiVendorDevicePath0, FALSE, FALSE);
+  if (HiiSetString (HiiHandle[0], STRING_TOKEN (STR_DEVICE_PATH), NewString, NULL) == 0) {
+    DriverSampleUnload (ImageHandle);
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  if (NewString != NULL) {
+    FreePool (NewString);
+  }
+
+  //
+  // Very simple example of how one would update a string that is already
+  // in the HII database
+  //
+  NewString = L"700 Mhz";
+
+  if (HiiSetString (HiiHandle[0], STRING_TOKEN (STR_CPU_STRING2), NewString, NULL) == 0) {
+    DriverSampleUnload (ImageHandle);
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  HiiSetString (HiiHandle[0], 0, NewString, NULL);
+
+  //
+  // Initialize Name/Value name String ID
+  //
+  mPrivateData->NameStringId[0] = STR_NAME_VALUE_VAR_NAME0;
+  mPrivateData->NameStringId[1] = STR_NAME_VALUE_VAR_NAME1;
+  mPrivateData->NameStringId[2] = STR_NAME_VALUE_VAR_NAME2;
+
+  //
+  // Initialize configuration data
+  //
+  Configuration = &mPrivateData->Configuration;
+  ZeroMem (Configuration, sizeof (DRIVER_SAMPLE_CONFIGURATION));
+
+  //
+  // Try to read NV config EFI variable first
+  //
+  ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, VariableName, DriverHandle[0]);
+  ASSERT (ConfigRequestHdr != NULL);
+
+  NameRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, NULL, DriverHandle[0]);
+  ASSERT (NameRequestHdr != NULL);
+
+  BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
+  Status     = gRT->GetVariable (VariableName, &gDriverSampleFormSetGuid, NULL, &BufferSize, Configuration);
+  if (EFI_ERROR (Status)) {
+    //
+    // Store zero data Buffer Storage to EFI variable
+    //
+    Status = gRT->SetVariable (
+                    VariableName,
+                    &gDriverSampleFormSetGuid,
+                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                    sizeof (DRIVER_SAMPLE_CONFIGURATION),
+                    Configuration
+                    );
+    if (EFI_ERROR (Status)) {
+      DriverSampleUnload (ImageHandle);
+      return Status;
+    }
+
+    //
+    // EFI variable for NV config doesn't exit, we should build this variable
+    // based on default values stored in IFR
+    //
+    ActionFlag = HiiSetToDefaults (NameRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+
+    ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+  } else {
+    //
+    // EFI variable does exist and Validate Current Setting
+    //
+    ActionFlag = HiiValidateSettings (NameRequestHdr);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+
+    ActionFlag = HiiValidateSettings (ConfigRequestHdr);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+  }
+
+  FreePool (ConfigRequestHdr);
+
+  //
+  // Initialize efi varstore configuration data
+  //
+  VarStoreConfig = &mPrivateData->VarStoreConfig;
+  ZeroMem (VarStoreConfig, sizeof (MY_EFI_VARSTORE_DATA));
+
+  ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, MyEfiVar, DriverHandle[0]);
+  ASSERT (ConfigRequestHdr != NULL);
+
+  BufferSize = sizeof (MY_EFI_VARSTORE_DATA);
+  Status     = gRT->GetVariable (MyEfiVar, &gDriverSampleFormSetGuid, NULL, &BufferSize, VarStoreConfig);
+  if (EFI_ERROR (Status)) {
+    //
+    // Store zero data to EFI variable Storage.
+    //
+    Status = gRT->SetVariable (
+                    MyEfiVar,
+                    &gDriverSampleFormSetGuid,
+                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                    sizeof (MY_EFI_VARSTORE_DATA),
+                    VarStoreConfig
+                    );
+    if (EFI_ERROR (Status)) {
+      DriverSampleUnload (ImageHandle);
+      return Status;
+    }
+
+    //
+    // EFI variable for NV config doesn't exit, we should build this variable
+    // based on default values stored in IFR
+    //
+    ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+  } else {
+    //
+    // EFI variable does exist and Validate Current Setting
+    //
+    ActionFlag = HiiValidateSettings (ConfigRequestHdr);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+  }
+
+  FreePool (ConfigRequestHdr);
+
+  //
+  // Initialize Bits efi varstore configuration data
+  //
+  BitsVarStoreConfig = &mPrivateData->BitsVarStoreConfig;
+  ZeroMem (BitsVarStoreConfig, sizeof (MY_EFI_BITS_VARSTORE_DATA));
+
+  ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, MyEfiBitVar, DriverHandle[0]);
+  ASSERT (ConfigRequestHdr != NULL);
+
+  BufferSize = sizeof (MY_EFI_BITS_VARSTORE_DATA);
+  Status     = gRT->GetVariable (MyEfiBitVar, &gDriverSampleFormSetGuid, NULL, &BufferSize, BitsVarStoreConfig);
+  if (EFI_ERROR (Status)) {
+    //
+    // Store zero data to EFI variable Storage.
+    //
+    Status = gRT->SetVariable (
+                    MyEfiBitVar,
+                    &gDriverSampleFormSetGuid,
+                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                    sizeof (MY_EFI_BITS_VARSTORE_DATA),
+                    BitsVarStoreConfig
+                    );
+    if (EFI_ERROR (Status)) {
+      DriverSampleUnload (ImageHandle);
+      return Status;
+    }
+
+    //
+    // EFI variable for NV config doesn't exit, we should build this variable
+    // based on default values stored in IFR
+    //
+    ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+  } else {
+    //
+    // EFI variable does exist and Validate Current Setting
+    //
+    ActionFlag = HiiValidateSettings (ConfigRequestHdr);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+  }
+
+  FreePool (ConfigRequestHdr);
+
+  //
+  // Initialize Union efi varstore configuration data
+  //
+  UnionConfig = &mPrivateData->UnionConfig;
+  ZeroMem (UnionConfig, sizeof (MY_EFI_UNION_DATA));
+
+  ConfigRequestHdr = HiiConstructConfigHdr (&gDriverSampleFormSetGuid, MyEfiUnionVar, DriverHandle[0]);
+  ASSERT (ConfigRequestHdr != NULL);
+
+  BufferSize = sizeof (MY_EFI_UNION_DATA);
+  Status     = gRT->GetVariable (MyEfiUnionVar, &gDriverSampleFormSetGuid, NULL, &BufferSize, UnionConfig);
+  if (EFI_ERROR (Status)) {
+    //
+    // Store zero data to EFI variable Storage.
+    //
+    Status = gRT->SetVariable (
+                    MyEfiUnionVar,
+                    &gDriverSampleFormSetGuid,
+                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+                    sizeof (MY_EFI_UNION_DATA),
+                    UnionConfig
+                    );
+    if (EFI_ERROR (Status)) {
+      DriverSampleUnload (ImageHandle);
+      return Status;
+    }
+
+    //
+    // EFI variable for NV config doesn't exit, we should build this variable
+    // based on default values stored in IFR
+    //
+    ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+  } else {
+    //
+    // EFI variable does exist and Validate Current Setting
+    //
+    ActionFlag = HiiValidateSettings (ConfigRequestHdr);
+    if (!ActionFlag) {
+      DriverSampleUnload (ImageHandle);
+      return EFI_INVALID_PARAMETER;
+    }
+  }
+
+  FreePool (ConfigRequestHdr);
+
+  Status = gBS->CreateEventEx (
+                  EVT_NOTIFY_SIGNAL,
+                  TPL_NOTIFY,
+                  EfiEventEmptyFunction,
+                  NULL,
+                  &gEfiIfrRefreshIdOpGuid,
+                  &mEvent
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  //
+  // Example of how to use BrowserEx protocol to register HotKey.
+  //
+  Status = gBS->LocateProtocol (&gEdkiiFormBrowserExProtocolGuid, NULL, (VOID **)&FormBrowserEx);
+  if (!EFI_ERROR (Status)) {
+    //
+    // First unregister the default hot key F9 and F10.
+    //
+    HotKey.UnicodeChar = CHAR_NULL;
+    HotKey.ScanCode    = SCAN_F9;
+    FormBrowserEx->RegisterHotKey (&HotKey, 0, 0, NULL);
+    HotKey.ScanCode = SCAN_F10;
+    FormBrowserEx->RegisterHotKey (&HotKey, 0, 0, NULL);
+
+    //
+    // Register the default HotKey F9 and F10 again.
+    //
+    HotKey.ScanCode = SCAN_F10;
+    NewString       = HiiGetString (mPrivateData->HiiHandle[0], STRING_TOKEN (FUNCTION_TEN_STRING), NULL);
+    ASSERT (NewString != NULL);
+    FormBrowserEx->RegisterHotKey (&HotKey, BROWSER_ACTION_SUBMIT, 0, NewString);
+    HotKey.ScanCode = SCAN_F9;
+    NewString       = HiiGetString (mPrivateData->HiiHandle[0], STRING_TOKEN (FUNCTION_NINE_STRING), NULL);
+    ASSERT (NewString != NULL);
+    FormBrowserEx->RegisterHotKey (&HotKey, BROWSER_ACTION_DEFAULT, EFI_HII_DEFAULT_CLASS_STANDARD, NewString);
+  }
+
+  //
+  // In default, this driver is built into Flash device image,
+  // the following code doesn't run.
+  //
+
+  //
+  // Example of how to display only the item we sent to HII
+  // When this driver is not built into Flash device image,
+  // it need to call SendForm to show front page by itself.
+  //
+  if (DISPLAY_ONLY_MY_ITEM <= 1) {
+    //
+    // Have the browser pull out our copy of the data, and only display our data
+    //
+    Status = FormBrowser2->SendForm (
+                             FormBrowser2,
+                             &(HiiHandle[DISPLAY_ONLY_MY_ITEM]),
+                             1,
+                             NULL,
+                             0,
+                             NULL,
+                             NULL
+                             );
+
+    HiiRemovePackages (HiiHandle[0]);
+
+    HiiRemovePackages (HiiHandle[1]);
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Unloads the application and its installed protocol.
+
+  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
+
+  @retval EFI_SUCCESS           The image has been unloaded.
+**/
+EFI_STATUS
+EFIAPI
+DriverSampleUnload (
+  IN EFI_HANDLE  ImageHandle
+  )
+{
+  UINTN  Index;
+
+  ASSERT (mPrivateData != NULL);
+
+  if (DriverHandle[0] != NULL) {
+    gBS->UninstallMultipleProtocolInterfaces (
+           DriverHandle[0],
+           &gEfiDevicePathProtocolGuid,
+           &mHiiVendorDevicePath0,
+           &gEfiHiiConfigAccessProtocolGuid,
+           &mPrivateData->ConfigAccess,
+           NULL
+           );
+    DriverHandle[0] = NULL;
+  }
+
+  if (DriverHandle[1] != NULL) {
+    gBS->UninstallMultipleProtocolInterfaces (
+           DriverHandle[1],
+           &gEfiDevicePathProtocolGuid,
+           &mHiiVendorDevicePath1,
+           &gEfiHiiConfigAccessProtocolGuid,
+           &mPrivateData->ConfigAccess,
+           NULL
+           );
+    DriverHandle[1] = NULL;
+  }
+
+  if (mPrivateData->HiiHandle[0] != NULL) {
+    HiiRemovePackages (mPrivateData->HiiHandle[0]);
+  }
+
+  if (mPrivateData->HiiHandle[1] != NULL) {
+    HiiRemovePackages (mPrivateData->HiiHandle[1]);
+  }
+
+  for (Index = 0; Index < NAME_VALUE_NAME_NUMBER; Index++) {
+    if (mPrivateData->NameValueName[Index] != NULL) {
+      FreePool (mPrivateData->NameValueName[Index]);
+    }
+  }
+
+  FreePool (mPrivateData);
+  mPrivateData = NULL;
+
+  gBS->CloseEvent (mEvent);
+
+  return EFI_SUCCESS;
+}