Exemplo n.º 1
0
/**
  Dispatch BMM formset and FileExplorer formset.


  @param CallbackData    The BMM context data.

  @retval EFI_SUCCESS If function complete successfully.
  @return Other value if the Setup Browser process BMM's pages and
           return unsuccessfully.

**/
EFI_STATUS
FormSetDispatcher (
  IN  BMM_CALLBACK_DATA    *CallbackData
  )
{
  EFI_STATUS                 Status;
  EFI_BROWSER_ACTION_REQUEST ActionRequest;

  while (TRUE) {
    UpdatePageId (CallbackData, FORM_MAIN_ID);

    ActionRequest = EFI_BROWSER_ACTION_REQUEST_NONE;
    Status = gFormBrowser2->SendForm (
                             gFormBrowser2,
                             &CallbackData->BmmHiiHandle,
                             1,
                             &gBootMaintFormSetGuid,
                             0,
                             NULL,
                             &ActionRequest
                             );
    if (ActionRequest == EFI_BROWSER_ACTION_REQUEST_RESET) {
      EnableResetRequired ();
    }

    ReclaimStringDepository ();

    //
    // When this Formset returns, check if we are going to explore files.
    //
    if (FileExplorerStateInActive != CallbackData->FeCurrentState) {
      UpdateFileExplorer (CallbackData, 0);

      ActionRequest = EFI_BROWSER_ACTION_REQUEST_NONE;
      Status = gFormBrowser2->SendForm (
                               gFormBrowser2,
                               &CallbackData->FeHiiHandle,
                               1,
                               &gFileExploreFormSetGuid,
                               0,
                               NULL,
                               &ActionRequest
                               );
      if (ActionRequest == EFI_BROWSER_ACTION_REQUEST_RESET) {
        EnableResetRequired ();
      }

      CallbackData->FeCurrentState    = FileExplorerStateInActive;
      CallbackData->FeDisplayContext  = FileExplorerDisplayUnknown;
      ReclaimStringDepository ();
    } else {
      break;
    }
  }

  return Status;
}
Exemplo n.º 2
0
/**
  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.
  @retval EFI_INVALID_PARAMETER The parameter of Value or ActionRequest is invalid.
**/
EFI_STATUS
EFIAPI
BootMaintCallback (
  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
  )
{
  BMM_CALLBACK_DATA *Private;
  BM_MENU_ENTRY     *NewMenuEntry;
  BMM_FAKE_NV_DATA  *CurrentFakeNVMap;
  EFI_STATUS        Status;
  UINTN             OldValue;
  UINTN             NewValue;
  UINTN             Number;
  UINTN             Pos;
  UINTN             Bit;
  UINT16            NewValuePos;
  UINT16            Index3;  
  UINT16            Index2;
  UINT16            Index;
  UINT8             *OldLegacyDev;
  UINT8             *NewLegacyDev;
  UINT8             *DisMap;

  if (Action != EFI_BROWSER_ACTION_CHANGING && Action != EFI_BROWSER_ACTION_CHANGED) {    
    //
    // All other action return unsupported.
    //
    return EFI_UNSUPPORTED;
  }
  
  Status       = EFI_SUCCESS;
  OldValue     = 0;
  NewValue     = 0;
  Number       = 0;
  OldLegacyDev = NULL;
  NewLegacyDev = NULL;
  NewValuePos  = 0;
  DisMap       = NULL;

  Private      = BMM_CALLBACK_DATA_FROM_THIS (This);
  //
  // Retrive uncommitted data from Form Browser
  //
  CurrentFakeNVMap = &Private->BmmFakeNvData;
  HiiGetBrowserData (&gBootMaintFormSetGuid, mBootMaintStorageName, sizeof (BMM_FAKE_NV_DATA), (UINT8 *) CurrentFakeNVMap);
  if (Action == EFI_BROWSER_ACTION_CHANGING) {
    if (Value == NULL) {
      return EFI_INVALID_PARAMETER;
    }
    
    UpdatePageId (Private, QuestionId);

    //
    // need to be subtituded.
    //
    // Update Select FD/HD/CD/NET/BEV Order Form
    //
    if ((QuestionId >= LEGACY_FD_QUESTION_ID) && (QuestionId < LEGACY_BEV_QUESTION_ID + MAX_MENU_NUMBER)) {

      DisMap  = Private->BmmOldFakeNVData.DisableMap;

      if (QuestionId >= LEGACY_FD_QUESTION_ID && QuestionId < LEGACY_FD_QUESTION_ID + MAX_MENU_NUMBER) {
        Number        = (UINT16) LegacyFDMenu.MenuNumber;
        OldLegacyDev  = Private->BmmOldFakeNVData.LegacyFD;
        NewLegacyDev  = CurrentFakeNVMap->LegacyFD;
      } else if (QuestionId >= LEGACY_HD_QUESTION_ID && QuestionId < LEGACY_HD_QUESTION_ID + MAX_MENU_NUMBER) {
        Number        = (UINT16) LegacyHDMenu.MenuNumber;
        OldLegacyDev  = Private->BmmOldFakeNVData.LegacyHD;
        NewLegacyDev  = CurrentFakeNVMap->LegacyHD;
      } else if (QuestionId >= LEGACY_CD_QUESTION_ID && QuestionId < LEGACY_CD_QUESTION_ID + MAX_MENU_NUMBER) {
        Number        = (UINT16) LegacyCDMenu.MenuNumber;
        OldLegacyDev  = Private->BmmOldFakeNVData.LegacyCD;
        NewLegacyDev  = CurrentFakeNVMap->LegacyCD;
      } else if (QuestionId >= LEGACY_NET_QUESTION_ID && QuestionId < LEGACY_NET_QUESTION_ID + MAX_MENU_NUMBER) {
        Number        = (UINT16) LegacyNETMenu.MenuNumber;
        OldLegacyDev  = Private->BmmOldFakeNVData.LegacyNET;
        NewLegacyDev  = CurrentFakeNVMap->LegacyNET;
      } else if (QuestionId >= LEGACY_BEV_QUESTION_ID && QuestionId < LEGACY_BEV_QUESTION_ID + MAX_MENU_NUMBER) {
        Number        = (UINT16) LegacyBEVMenu.MenuNumber;
        OldLegacyDev  = Private->BmmOldFakeNVData.LegacyBEV;
        NewLegacyDev  = CurrentFakeNVMap->LegacyBEV;
      }
      //
      //  First, find the different position
      //  if there is change, it should be only one
      //
      for (Index = 0; Index < Number; Index++) {
        if (OldLegacyDev[Index] != NewLegacyDev[Index]) {
          OldValue  = OldLegacyDev[Index];
          NewValue  = NewLegacyDev[Index];
          break;
        }
      }

      if (Index != Number) {
        //
        // there is change, now process
        //
        if (0xFF == NewValue) {
          //
          // This item will be disable
          // Just move the items behind this forward to overlap it
          //
          Pos = OldValue / 8;
          Bit = 7 - (OldValue % 8);
          DisMap[Pos] = (UINT8) (DisMap[Pos] | (UINT8) (1 << Bit));
          for (Index2 = Index; Index2 < Number - 1; Index2++) {
            NewLegacyDev[Index2] = NewLegacyDev[Index2 + 1];
          }

          NewLegacyDev[Index2] = 0xFF;
        } else {
          for (Index2 = 0; Index2 < Number; Index2++) {
            if (Index2 == Index) {
              continue;
            }

            if (OldLegacyDev[Index2] == NewValue) {
              //
              // If NewValue is in OldLegacyDev array
              // remember its old position
              //
              NewValuePos = Index2;
              break;
            }
          }

          if (Index2 != Number) {
            //
            // We will change current item to an existing item
            // (It's hard to describe here, please read code, it's like a cycle-moving)
            //
            for (Index2 = NewValuePos; Index2 != Index;) {
              if (NewValuePos < Index) {
                NewLegacyDev[Index2] = OldLegacyDev[Index2 + 1];
                Index2++;
              } else {
                NewLegacyDev[Index2] = OldLegacyDev[Index2 - 1];
                Index2--;
              }
            }
          } else {
            //
            // If NewValue is not in OldlegacyDev array, we are changing to a disabled item
            // so we should modify DisMap to reflect the change
            //
            Pos = NewValue / 8;
            Bit = 7 - (NewValue % 8);
            DisMap[Pos] = (UINT8) (DisMap[Pos] & (~ (UINT8) (1 << Bit)));
            if (0xFF != OldValue) {
              //
              // Because NewValue is a item that was disabled before
              // so after changing the OldValue should be disabled
              // actually we are doing a swap of enable-disable states of two items
              //
              Pos = OldValue / 8;
              Bit = 7 - (OldValue % 8);
              DisMap[Pos] = (UINT8) (DisMap[Pos] | (UINT8) (1 << Bit));
            }
          }
        }
        //
        // To prevent DISABLE appears in the middle of the list
        // we should perform a re-ordering
        //
        Index3 = Index;
        Index = 0;
        while (Index < Number) {
          if (0xFF != NewLegacyDev[Index]) {
            Index++;
            continue;
          }

          Index2 = Index;
          Index2++;
          while (Index2 < Number) {
            if (0xFF != NewLegacyDev[Index2]) {
              break;
            }

            Index2++;
          }

          if (Index2 < Number) {
            NewLegacyDev[Index]   = NewLegacyDev[Index2];
            NewLegacyDev[Index2]  = 0xFF;
          }

          Index++;
        }

        CopyMem (
          OldLegacyDev,
          NewLegacyDev,
          Number
          );

        //
        //  Return correct question value.
        //
        Value->u8 = NewLegacyDev[Index3];
      }
    }

    if (QuestionId < FILE_OPTION_OFFSET) {
      if (QuestionId < CONFIG_OPTION_OFFSET) {
        switch (QuestionId) {
        case KEY_VALUE_BOOT_FROM_FILE:
          Private->FeCurrentState = FileExplorerStateBootFromFile;
          break;

        case FORM_BOOT_ADD_ID:
          Private->FeCurrentState = FileExplorerStateAddBootOption;
          break;

        case FORM_DRV_ADD_FILE_ID:
          Private->FeCurrentState = FileExplorerStateAddDriverOptionState;
          break;

        case FORM_DRV_ADD_HANDLE_ID:
          CleanUpPage (FORM_DRV_ADD_HANDLE_ID, Private);
          UpdateDrvAddHandlePage (Private);
          break;

        case FORM_BOOT_DEL_ID:
          CleanUpPage (FORM_BOOT_DEL_ID, Private);
          UpdateBootDelPage (Private);
          break;

        case FORM_BOOT_CHG_ID:
        case FORM_DRV_CHG_ID:
          UpdatePageBody (QuestionId, Private);
          break;

        case FORM_DRV_DEL_ID:
          CleanUpPage (FORM_DRV_DEL_ID, Private);
          UpdateDrvDelPage (Private);
          break;

        case FORM_BOOT_NEXT_ID:
          CleanUpPage (FORM_BOOT_NEXT_ID, Private);
          UpdateBootNextPage (Private);
          break;

        case FORM_TIME_OUT_ID:
          CleanUpPage (FORM_TIME_OUT_ID, Private);
          UpdateTimeOutPage (Private);
          break;

        case FORM_CON_IN_ID:
        case FORM_CON_OUT_ID:
        case FORM_CON_ERR_ID:
          UpdatePageBody (QuestionId, Private);
          break;

        case FORM_CON_MODE_ID:
          CleanUpPage (FORM_CON_MODE_ID, Private);
          UpdateConModePage (Private);
          break;

        case FORM_CON_COM_ID:
          CleanUpPage (FORM_CON_COM_ID, Private);
          UpdateConCOMPage (Private);
          break;

        case FORM_SET_FD_ORDER_ID:
        case FORM_SET_HD_ORDER_ID:
        case FORM_SET_CD_ORDER_ID:
        case FORM_SET_NET_ORDER_ID:
        case FORM_SET_BEV_ORDER_ID:
          CleanUpPage (QuestionId, Private);
          UpdateSetLegacyDeviceOrderPage (QuestionId, Private);
          break;

        default:
          break;
        }
      } else if ((QuestionId >= TERMINAL_OPTION_OFFSET) && (QuestionId < CONSOLE_OPTION_OFFSET)) {
        Index2                    = (UINT16) (QuestionId - TERMINAL_OPTION_OFFSET);
        Private->CurrentTerminal  = Index2;

        CleanUpPage (FORM_CON_COM_SETUP_ID, Private);
        UpdateTerminalPage (Private);

      } else if (QuestionId >= HANDLE_OPTION_OFFSET) {
        Index2                  = (UINT16) (QuestionId - HANDLE_OPTION_OFFSET);

        NewMenuEntry            = BOpt_GetMenuEntry (&DriverMenu, Index2);
        ASSERT (NewMenuEntry != NULL);
        Private->HandleContext  = (BM_HANDLE_CONTEXT *) NewMenuEntry->VariableContext;

        CleanUpPage (FORM_DRV_ADD_HANDLE_DESC_ID, Private);

        Private->MenuEntry                  = NewMenuEntry;
        Private->LoadContext->FilePathList  = Private->HandleContext->DevicePath;

        UpdateDriverAddHandleDescPage (Private);
      }
    }
  } else if (Action == EFI_BROWSER_ACTION_CHANGED) {
    if ((Value == NULL) || (ActionRequest == NULL)) {
      return EFI_INVALID_PARAMETER;
    }
    
    switch (QuestionId) {
    case KEY_VALUE_SAVE_AND_EXIT:
    case KEY_VALUE_NO_SAVE_AND_EXIT:
      if (QuestionId == KEY_VALUE_SAVE_AND_EXIT) {
        Status = ApplyChangeHandler (Private, CurrentFakeNVMap, Private->BmmPreviousPageId);
        if (EFI_ERROR (Status)) {
          return Status;
        }
      } else if (QuestionId == KEY_VALUE_NO_SAVE_AND_EXIT) {
        DiscardChangeHandler (Private, CurrentFakeNVMap);
      }

      //
      // Tell browser not to ask for confirmation of changes,
      // since we have already applied or discarded.
      //
      *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT;
      break;  

    case FORM_RESET:
      gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
      return EFI_UNSUPPORTED;

    default:
      break;
    }
  }

  //
  // Pass changed uncommitted data back to Form Browser
  //
  HiiSetBrowserData (&gBootMaintFormSetGuid, mBootMaintStorageName, sizeof (BMM_FAKE_NV_DATA), (UINT8 *) CurrentFakeNVMap, NULL);
  return EFI_SUCCESS;
}
Exemplo n.º 3
0
/**
  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.
  @retval EFI_INVALID_PARAMETER The parameter of Value or ActionRequest is invalid.
**/
EFI_STATUS
EFIAPI
BootMaintCallback (
  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
  )
{
  BMM_CALLBACK_DATA *Private;
  BM_MENU_ENTRY     *NewMenuEntry;
  BMM_FAKE_NV_DATA  *CurrentFakeNVMap;
  EFI_STATUS        Status;
  UINTN             OldValue;
  UINTN             NewValue;
  UINTN             Number;
  UINTN             Index;

  //
  //Chech whether exit from FileExplorer and reenter BM,if yes,reclaim string depositories
  //
  if (Action == EFI_BROWSER_ACTION_FORM_OPEN){
    if(mEnterFileExplorer ){
      ReclaimStringDepository();
      mEnterFileExplorer = FALSE;
    }
  }

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

  OldValue       = 0;
  NewValue       = 0;
  Number         = 0;

  Private        = BMM_CALLBACK_DATA_FROM_THIS (This);

  //
  // Retrive uncommitted data from Form Browser
  //
  CurrentFakeNVMap = &Private->BmmFakeNvData;
  HiiGetBrowserData (&mBootMaintGuid, mBootMaintStorageName, sizeof (BMM_FAKE_NV_DATA), (UINT8 *) CurrentFakeNVMap);

  if (Action == EFI_BROWSER_ACTION_CHANGING) {
    if (Value == NULL) {
      return EFI_INVALID_PARAMETER;
    }
    
    UpdatePageId (Private, QuestionId);

    if (QuestionId < FILE_OPTION_OFFSET) {
      if (QuestionId < CONFIG_OPTION_OFFSET) {
        switch (QuestionId) {
        case FORM_BOOT_ADD_ID:
          // Leave Bm and enter FileExplorer.
          Private->FeCurrentState = FileExplorerStateAddBootOption;
          Private->FeDisplayContext = FileExplorerDisplayUnknown;
          ReclaimStringDepository (); 
          UpdateFileExplorer(Private, 0);
          mEnterFileExplorer = TRUE;
          break;

        case FORM_DRV_ADD_FILE_ID:
          // Leave Bm and enter FileExplorer.
          Private->FeCurrentState = FileExplorerStateAddDriverOptionState;
          Private->FeDisplayContext = FileExplorerDisplayUnknown;
          ReclaimStringDepository ();
          UpdateFileExplorer(Private, 0);
          mEnterFileExplorer = TRUE;
          break;

        case FORM_DRV_ADD_HANDLE_ID:
          CleanUpPage (FORM_DRV_ADD_HANDLE_ID, Private);
          UpdateDrvAddHandlePage (Private);
          break;

        case FORM_BOOT_DEL_ID:
          CleanUpPage (FORM_BOOT_DEL_ID, Private);
          UpdateBootDelPage (Private);
          break;

        case FORM_BOOT_CHG_ID:
        case FORM_DRV_CHG_ID:
          UpdatePageBody (QuestionId, Private);
          break;

        case FORM_DRV_DEL_ID:
          CleanUpPage (FORM_DRV_DEL_ID, Private);
          UpdateDrvDelPage (Private);
          break;

        case FORM_BOOT_NEXT_ID:
          CleanUpPage (FORM_BOOT_NEXT_ID, Private);
          UpdateBootNextPage (Private);
          break;

        case FORM_TIME_OUT_ID:
          CleanUpPage (FORM_TIME_OUT_ID, Private);
          UpdateTimeOutPage (Private);
          break;

        case FORM_CON_IN_ID:
        case FORM_CON_OUT_ID:
        case FORM_CON_ERR_ID:
          UpdatePageBody (QuestionId, Private);
          break;

        case FORM_CON_MODE_ID:
          CleanUpPage (FORM_CON_MODE_ID, Private);
          UpdateConModePage (Private);
          break;

        case FORM_CON_COM_ID:
          CleanUpPage (FORM_CON_COM_ID, Private);
          UpdateConCOMPage (Private);
          break;

        default:
          break;
        }
      } else if ((QuestionId >= TERMINAL_OPTION_OFFSET) && (QuestionId < CONSOLE_OPTION_OFFSET)) {
        Index                  = (UINT16) (QuestionId - TERMINAL_OPTION_OFFSET);
        Private->CurrentTerminal  = Index;

        CleanUpPage (FORM_CON_COM_SETUP_ID, Private);
        UpdateTerminalPage (Private);

      } else if (QuestionId >= HANDLE_OPTION_OFFSET) {
        Index                  = (UINT16) (QuestionId - HANDLE_OPTION_OFFSET);

        NewMenuEntry            = BOpt_GetMenuEntry (&DriverMenu, Index);
        ASSERT (NewMenuEntry != NULL);
        Private->HandleContext  = (BM_HANDLE_CONTEXT *) NewMenuEntry->VariableContext;

        CleanUpPage (FORM_DRV_ADD_HANDLE_DESC_ID, Private);

        Private->MenuEntry                  = NewMenuEntry;
        Private->LoadContext->FilePathList  = Private->HandleContext->DevicePath;

        UpdateDriverAddHandleDescPage (Private);
      }
    }
    if (QuestionId == KEY_VALUE_BOOT_FROM_FILE){
      // Leave Bm and enter FileExplorer.
      Private->FeCurrentState = FileExplorerStateBootFromFile;
      Private->FeDisplayContext = FileExplorerDisplayUnknown;
      ReclaimStringDepository ();
      UpdateFileExplorer(Private, 0);
      mEnterFileExplorer = TRUE;
    }
  } else if (Action == EFI_BROWSER_ACTION_CHANGED) {
    if ((Value == NULL) || (ActionRequest == NULL)) {
      return EFI_INVALID_PARAMETER;
    }

    switch (QuestionId) {
    case KEY_VALUE_SAVE_AND_EXIT:
    case KEY_VALUE_NO_SAVE_AND_EXIT:
      if (QuestionId == KEY_VALUE_SAVE_AND_EXIT) {
        Status = ApplyChangeHandler (Private, CurrentFakeNVMap, Private->BmmPreviousPageId);
        if (EFI_ERROR (Status)) {
          return Status;
        }
      } else if (QuestionId == KEY_VALUE_NO_SAVE_AND_EXIT) {
        DiscardChangeHandler (Private, CurrentFakeNVMap);
      }

      //
      // Tell browser not to ask for confirmation of changes,
      // since we have already applied or discarded.
      //
      *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT;

      break;
 
    case FORM_RESET:
      gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
      return EFI_UNSUPPORTED;

    default:
      break;
    }
  }

  //
  // Pass changed uncommitted data back to Form Browser
  //
  HiiSetBrowserData (&mBootMaintGuid, mBootMaintStorageName, sizeof (BMM_FAKE_NV_DATA), (UINT8 *) CurrentFakeNVMap, NULL);

  return EFI_SUCCESS;
}
Exemplo n.º 4
0
/**
  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.
  @retval EFI_INVALID_PARAMETER The parameter of Value or ActionRequest is invalid.
**/
EFI_STATUS
EFIAPI
BootMaintCallback (
  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
  )
{
  BMM_CALLBACK_DATA *Private;
  BM_MENU_ENTRY     *NewMenuEntry;
  BMM_FAKE_NV_DATA  *CurrentFakeNVMap;
  UINTN             Index;
  EFI_DEVICE_PATH_PROTOCOL * File;

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

  Private        = BMM_CALLBACK_DATA_FROM_THIS (This);
  //
  // Retrive uncommitted data from Form Browser
  //
  CurrentFakeNVMap = &Private->BmmFakeNvData;
  HiiGetBrowserData (&mBootMaintGuid, mBootMaintStorageName, sizeof (BMM_FAKE_NV_DATA), (UINT8 *) CurrentFakeNVMap);

  if (Action == EFI_BROWSER_ACTION_CHANGING) {
    if (Value == NULL) {
      return EFI_INVALID_PARAMETER;
    }
    
    UpdatePageId (Private, QuestionId);

    if (QuestionId < FILE_OPTION_OFFSET) {
      if (QuestionId < CONFIG_OPTION_OFFSET) {
        switch (QuestionId) {
        case FORM_BOOT_ADD_ID:
          // Leave BMM and enter FileExplorer. 
          ChooseFile (NULL, L".efi", CreateBootOptionFromFile, &File);
          break;

        case FORM_DRV_ADD_FILE_ID:
          // Leave BMM and enter FileExplorer.
          ChooseFile (NULL, L".efi", CreateDriverOptionFromFile, &File);
          break;

        case FORM_DRV_ADD_HANDLE_ID:
          CleanUpPage (FORM_DRV_ADD_HANDLE_ID, Private);
          UpdateDrvAddHandlePage (Private);
          break;

        case FORM_BOOT_DEL_ID:
          CleanUpPage (FORM_BOOT_DEL_ID, Private);
          UpdateBootDelPage (Private);
          break;

        case FORM_BOOT_CHG_ID:
        case FORM_DRV_CHG_ID:
          UpdatePageBody (QuestionId, Private);
          break;

        case FORM_DRV_DEL_ID:
          CleanUpPage (FORM_DRV_DEL_ID, Private);
          UpdateDrvDelPage (Private);
          break;

        case FORM_CON_IN_ID:
        case FORM_CON_OUT_ID:
        case FORM_CON_ERR_ID:
          UpdatePageBody (QuestionId, Private);
          break;

        case FORM_CON_MODE_ID:
          CleanUpPage (FORM_CON_MODE_ID, Private);
          UpdateConModePage (Private);
          break;

        case FORM_CON_COM_ID:
          CleanUpPage (FORM_CON_COM_ID, Private);
          UpdateConCOMPage (Private);
          break;

        default:
          break;
        }
      } else if ((QuestionId >= TERMINAL_OPTION_OFFSET) && (QuestionId < CONSOLE_OPTION_OFFSET)) {
        Index                  = (UINT16) (QuestionId - TERMINAL_OPTION_OFFSET);
        Private->CurrentTerminal  = Index;

        CleanUpPage (FORM_CON_COM_SETUP_ID, Private);
        UpdateTerminalPage (Private);

      } else if (QuestionId >= HANDLE_OPTION_OFFSET) {
        Index                  = (UINT16) (QuestionId - HANDLE_OPTION_OFFSET);

        NewMenuEntry            = BOpt_GetMenuEntry (&DriverMenu, Index);
        ASSERT (NewMenuEntry != NULL);
        Private->HandleContext  = (BM_HANDLE_CONTEXT *) NewMenuEntry->VariableContext;

        CleanUpPage (FORM_DRV_ADD_HANDLE_DESC_ID, Private);

        Private->MenuEntry                  = NewMenuEntry;
        Private->LoadContext->FilePathList  = Private->HandleContext->DevicePath;

        UpdateDriverAddHandleDescPage (Private);
      }
    }
    if (QuestionId == KEY_VALUE_BOOT_FROM_FILE){
      // Leave BMM and enter FileExplorer.
      ChooseFile (NULL, L".efi", BootFromFile, &File);
    }
  } else if (Action == EFI_BROWSER_ACTION_CHANGED) {
    if ((Value == NULL) || (ActionRequest == NULL)) {
      return EFI_INVALID_PARAMETER;
    }
   
    if (QuestionId == KEY_VALUE_SAVE_AND_EXIT_BOOT) {
      CurrentFakeNVMap->BootOptionChanged = FALSE;
      *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT;
    } else if (QuestionId == KEY_VALUE_SAVE_AND_EXIT_DRIVER) {
      CurrentFakeNVMap->DriverOptionChanged = FALSE;
      *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT;
    } else if (QuestionId == KEY_VALUE_NO_SAVE_AND_EXIT_DRIVER) {
      //
      // Discard changes and exit formset
      //
      CurrentFakeNVMap->DriverOptionalData[0]     = 0x0000;
      CurrentFakeNVMap->DriverDescriptionData[0]  = 0x0000;
      CurrentFakeNVMap->DriverOptionChanged = FALSE;
      CurrentFakeNVMap->ForceReconnect      = TRUE;
      *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT;
    } else if (QuestionId == KEY_VALUE_NO_SAVE_AND_EXIT_BOOT) {
      //
      // Discard changes and exit formset
      //
      CurrentFakeNVMap->BootOptionalData[0]     = 0x0000;
      CurrentFakeNVMap->BootDescriptionData[0]  = 0x0000;
      CurrentFakeNVMap->BootOptionChanged = FALSE;
      *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT;
    } else if (QuestionId == KEY_VALUE_BOOT_DESCRIPTION || QuestionId == KEY_VALUE_BOOT_OPTION) {
      CurrentFakeNVMap->BootOptionChanged = TRUE;
    } else if (QuestionId == KEY_VALUE_DRIVER_DESCRIPTION || QuestionId == KEY_VALUE_DRIVER_OPTION) {
      CurrentFakeNVMap->DriverOptionChanged = TRUE;
    } 

    if ((QuestionId >= BOOT_OPTION_DEL_QUESTION_ID) && (QuestionId < BOOT_OPTION_DEL_QUESTION_ID + MAX_MENU_NUMBER)) {
      if (Value->b){
        //
        // Means user try to delete this boot option but not press F10 or "Commit Changes and Exit" menu.
        //
        CurrentFakeNVMap->BootOptionDelMark[QuestionId - BOOT_OPTION_DEL_QUESTION_ID] = TRUE;
      } else {
        //
        // Means user remove the old check status.
        //
        CurrentFakeNVMap->BootOptionDelMark[QuestionId - BOOT_OPTION_DEL_QUESTION_ID] = FALSE;
      }
    } else if ((QuestionId >= DRIVER_OPTION_DEL_QUESTION_ID) && (QuestionId < DRIVER_OPTION_DEL_QUESTION_ID + MAX_MENU_NUMBER)) {
      if (Value->b){
        CurrentFakeNVMap->DriverOptionDelMark[QuestionId - DRIVER_OPTION_DEL_QUESTION_ID] = TRUE;
      } else {
        CurrentFakeNVMap->DriverOptionDelMark[QuestionId - DRIVER_OPTION_DEL_QUESTION_ID] = FALSE;
      }
    } else {
      switch (QuestionId) {
      case KEY_VALUE_SAVE_AND_EXIT:
      case KEY_VALUE_NO_SAVE_AND_EXIT:
        if (QuestionId == KEY_VALUE_SAVE_AND_EXIT) {
          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_SUBMIT_EXIT;
        } else if (QuestionId == KEY_VALUE_NO_SAVE_AND_EXIT) {
          DiscardChangeHandler (Private, CurrentFakeNVMap);
          *ActionRequest = EFI_BROWSER_ACTION_REQUEST_FORM_DISCARD_EXIT;
        }

        break;

      case FORM_RESET:
        gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
        return EFI_UNSUPPORTED;

      default:
        break;
      }
    }
  }

  //
  // Pass changed uncommitted data back to Form Browser
  //
  HiiSetBrowserData (&mBootMaintGuid, mBootMaintStorageName, sizeof (BMM_FAKE_NV_DATA), (UINT8 *) CurrentFakeNVMap, NULL);

  return EFI_SUCCESS;
}