/** @file
  The boot manager reference implementation

Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "BootManager.h"
#include <Protocol/LoadedImage.h>

UINT16    mKeyInput;
EFI_GUID  mBootManagerGuid = BOOT_MANAGER_FORMSET_GUID;
//
// Boot video resolution and text mode.
//
UINT32  mBmBootHorizontalResolution = 0;
UINT32  mBmBootVerticalResolution   = 0;
UINT32  mBmBootTextModeColumn       = 0;
UINT32  mBmBootTextModeRow          = 0;
//
// BIOS setup video resolution and text mode.
//
UINT32  mBmSetupTextModeColumn       = 0;
UINT32  mBmSetupTextModeRow          = 0;
UINT32  mBmSetupHorizontalResolution = 0;
UINT32  mBmSetupVerticalResolution   = 0;

BOOLEAN  mBmModeInitialized = FALSE;

CHAR16  *mDeviceTypeStr[] = {
  L"Legacy BEV",
  L"Legacy Floppy",
  L"Legacy Hard Drive",
  L"Legacy CD ROM",
  L"Legacy PCMCIA",
  L"Legacy USB",
  L"Legacy Embedded Network",
  L"Legacy Unknown Device"
};

HII_VENDOR_DEVICE_PATH  mBootManagerHiiVendorDevicePath = {
  {
    {
      HARDWARE_DEVICE_PATH,
      HW_VENDOR_DP,
      {
        (UINT8)(sizeof (VENDOR_DEVICE_PATH)),
        (UINT8)((sizeof (VENDOR_DEVICE_PATH)) >> 8)
      }
    },
    //
    // {1DDDBE15-481D-4d2b-8277-B191EAF66525}
    //
    { 0x1dddbe15, 0x481d, 0x4d2b, { 0x82, 0x77, 0xb1, 0x91, 0xea, 0xf6, 0x65, 0x25 }
    }
  },
  {
    END_DEVICE_PATH_TYPE,
    END_ENTIRE_DEVICE_PATH_SUBTYPE,
    {
      (UINT8)(END_DEVICE_PATH_LENGTH),
      (UINT8)((END_DEVICE_PATH_LENGTH) >> 8)
    }
  }
};

BOOT_MANAGER_CALLBACK_DATA  gBootManagerPrivate = {
  BOOT_MANAGER_CALLBACK_DATA_SIGNATURE,
  NULL,
  NULL,
  {
    BootManagerExtractConfig,
    BootManagerRouteConfig,
    BootManagerCallback
  }
};

/**
  This function will change video resolution and text mode
  according to defined setup mode or defined boot mode

  @param  IsSetupMode   Indicate mode is changed to setup mode or boot mode.

  @retval  EFI_SUCCESS  Mode is changed successfully.
  @retval  Others             Mode failed to be changed.

**/
EFI_STATUS
BmSetConsoleMode (
  BOOLEAN  IsSetupMode
  )
{
  EFI_GRAPHICS_OUTPUT_PROTOCOL          *GraphicsOutput;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL       *SimpleTextOut;
  UINTN                                 SizeOfInfo;
  EFI_GRAPHICS_OUTPUT_MODE_INFORMATION  *Info;
  UINT32                                MaxGopMode;
  UINT32                                MaxTextMode;
  UINT32                                ModeNumber;
  UINT32                                NewHorizontalResolution;
  UINT32                                NewVerticalResolution;
  UINT32                                NewColumns;
  UINT32                                NewRows;
  UINTN                                 HandleCount;
  EFI_HANDLE                            *HandleBuffer;
  EFI_STATUS                            Status;
  UINTN                                 Index;
  UINTN                                 CurrentColumn;
  UINTN                                 CurrentRow;

  MaxGopMode  = 0;
  MaxTextMode = 0;

  //
  // Get current video resolution and text mode
  //
  Status = gBS->HandleProtocol (
                  gST->ConsoleOutHandle,
                  &gEfiGraphicsOutputProtocolGuid,
                  (VOID **)&GraphicsOutput
                  );
  if (EFI_ERROR (Status)) {
    GraphicsOutput = NULL;
  }

  Status = gBS->HandleProtocol (
                  gST->ConsoleOutHandle,
                  &gEfiSimpleTextOutProtocolGuid,
                  (VOID **)&SimpleTextOut
                  );
  if (EFI_ERROR (Status)) {
    SimpleTextOut = NULL;
  }

  if ((GraphicsOutput == NULL) || (SimpleTextOut == NULL)) {
    return EFI_UNSUPPORTED;
  }

  if (IsSetupMode) {
    //
    // The required resolution and text mode is setup mode.
    //
    NewHorizontalResolution = mBmSetupHorizontalResolution;
    NewVerticalResolution   = mBmSetupVerticalResolution;
    NewColumns              = mBmSetupTextModeColumn;
    NewRows                 = mBmSetupTextModeRow;
  } else {
    //
    // The required resolution and text mode is boot mode.
    //
    NewHorizontalResolution = mBmBootHorizontalResolution;
    NewVerticalResolution   = mBmBootVerticalResolution;
    NewColumns              = mBmBootTextModeColumn;
    NewRows                 = mBmBootTextModeRow;
  }

  if (GraphicsOutput != NULL) {
    MaxGopMode = GraphicsOutput->Mode->MaxMode;
  }

  if (SimpleTextOut != NULL) {
    MaxTextMode = SimpleTextOut->Mode->MaxMode;
  }

  //
  // 1. If current video resolution is same with required video resolution,
  //    video resolution need not be changed.
  //    1.1. If current text mode is same with required text mode, text mode need not be changed.
  //    1.2. If current text mode is different from required text mode, text mode need be changed.
  // 2. If current video resolution is different from required video resolution, we need restart whole console drivers.
  //
  for (ModeNumber = 0; ModeNumber < MaxGopMode; ModeNumber++) {
    Status = GraphicsOutput->QueryMode (
                               GraphicsOutput,
                               ModeNumber,
                               &SizeOfInfo,
                               &Info
                               );
    if (!EFI_ERROR (Status)) {
      if ((Info->HorizontalResolution == NewHorizontalResolution) &&
          (Info->VerticalResolution == NewVerticalResolution))
      {
        if ((GraphicsOutput->Mode->Info->HorizontalResolution == NewHorizontalResolution) &&
            (GraphicsOutput->Mode->Info->VerticalResolution == NewVerticalResolution))
        {
          //
          // Current resolution is same with required resolution, check if text mode need be set
          //
          Status = SimpleTextOut->QueryMode (SimpleTextOut, SimpleTextOut->Mode->Mode, &CurrentColumn, &CurrentRow);
          ASSERT_EFI_ERROR (Status);
          if ((CurrentColumn == NewColumns) && (CurrentRow == NewRows)) {
            //
            // If current text mode is same with required text mode. Do nothing
            //
            FreePool (Info);
            return EFI_SUCCESS;
          } else {
            //
            // If current text mode is different from required text mode.  Set new video mode
            //
            for (Index = 0; Index < MaxTextMode; Index++) {
              Status = SimpleTextOut->QueryMode (SimpleTextOut, Index, &CurrentColumn, &CurrentRow);
              if (!EFI_ERROR (Status)) {
                if ((CurrentColumn == NewColumns) && (CurrentRow == NewRows)) {
                  //
                  // Required text mode is supported, set it.
                  //
                  Status = SimpleTextOut->SetMode (SimpleTextOut, Index);
                  ASSERT_EFI_ERROR (Status);
                  //
                  // Update text mode PCD.
                  //
                  Status = PcdSet32S (PcdConOutColumn, mBmSetupTextModeColumn);
                  ASSERT_EFI_ERROR (Status);
                  Status = PcdSet32S (PcdConOutRow, mBmSetupTextModeRow);
                  ASSERT_EFI_ERROR (Status);
                  FreePool (Info);
                  return EFI_SUCCESS;
                }
              }
            }

            if (Index == MaxTextMode) {
              //
              // If required text mode is not supported, return error.
              //
              FreePool (Info);
              return EFI_UNSUPPORTED;
            }
          }
        } else {
          //
          // If current video resolution is not same with the new one, set new video resolution.
          // In this case, the driver which produces simple text out need be restarted.
          //
          Status = GraphicsOutput->SetMode (GraphicsOutput, ModeNumber);
          if (!EFI_ERROR (Status)) {
            FreePool (Info);
            break;
          }
        }
      }

      FreePool (Info);
    }
  }

  if (ModeNumber == MaxGopMode) {
    //
    // If the resolution is not supported, return error.
    //
    return EFI_UNSUPPORTED;
  }

  //
  // Set PCD to Inform GraphicsConsole to change video resolution.
  // Set PCD to Inform Consplitter to change text mode.
  //
  Status = PcdSet32S (PcdVideoHorizontalResolution, NewHorizontalResolution);
  ASSERT_EFI_ERROR (Status);
  Status = PcdSet32S (PcdVideoVerticalResolution, NewVerticalResolution);
  ASSERT_EFI_ERROR (Status);
  Status = PcdSet32S (PcdConOutColumn, NewColumns);
  ASSERT_EFI_ERROR (Status);
  Status = PcdSet32S (PcdConOutRow, NewRows);
  ASSERT_EFI_ERROR (Status);

  //
  // Video mode is changed, so restart graphics console driver and higher level driver.
  // Reconnect graphics console driver and higher level driver.
  // Locate all the handles with GOP protocol and reconnect it.
  //
  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiSimpleTextOutProtocolGuid,
                  NULL,
                  &HandleCount,
                  &HandleBuffer
                  );
  if (!EFI_ERROR (Status)) {
    for (Index = 0; Index < HandleCount; Index++) {
      gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);
    }

    for (Index = 0; Index < HandleCount; Index++) {
      gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);
    }

    if (HandleBuffer != NULL) {
      FreePool (HandleBuffer);
    }
  }

  return EFI_SUCCESS;
}

/**

  Check whether a reset is needed,if reset is needed, Popup a menu to notice user.

**/
VOID
BmSetupResetReminder (
  VOID
  )
{
  EFI_INPUT_KEY                           Key;
  CHAR16                                  *StringBuffer1;
  CHAR16                                  *StringBuffer2;
  EFI_STATUS                              Status;
  EDKII_FORM_BROWSER_EXTENSION2_PROTOCOL  *FormBrowserEx2;

  //
  // Use BrowserEx2 protocol to check whether reset is required.
  //
  Status = gBS->LocateProtocol (&gEdkiiFormBrowserEx2ProtocolGuid, NULL, (VOID **)&FormBrowserEx2);
  //
  // check any reset required change is applied? if yes, reset system
  //
  if (!EFI_ERROR (Status) && FormBrowserEx2->IsResetRequired ()) {
    StringBuffer1 = AllocateZeroPool (MAX_STRING_LEN * sizeof (CHAR16));
    ASSERT (StringBuffer1 != NULL);
    StringBuffer2 = AllocateZeroPool (MAX_STRING_LEN * sizeof (CHAR16));
    ASSERT (StringBuffer2 != NULL);
    StrCpyS (StringBuffer1, MAX_STRING_LEN, L"Configuration changed. Reset to apply it Now.");
    StrCpyS (StringBuffer2, MAX_STRING_LEN, L"Press ENTER to reset");
    //
    // Popup a menu to notice user
    //
    do {
      CreatePopUp (EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE, &Key, StringBuffer1, StringBuffer2, NULL);
    } while (Key.UnicodeChar != CHAR_CARRIAGE_RETURN);

    FreePool (StringBuffer1);
    FreePool (StringBuffer2);

    gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
  }
}

/**
  Group the legacy boot options in the BootOption.

  The routine assumes the boot options in the beginning that covers all the device
  types are ordered properly and re-position the following boot options just after
  the corresponding boot options with the same device type.
  For example:
  1. Input  = [Harddisk1 CdRom2 Efi1 Harddisk0 CdRom0 CdRom1 Harddisk2 Efi0]
     Assuming [Harddisk1 CdRom2 Efi1] is ordered properly
     Output = [Harddisk1 Harddisk0 Harddisk2 CdRom2 CdRom0 CdRom1 Efi1 Efi0]

  2. Input  = [Efi1 Efi0 CdRom1 Harddisk0 Harddisk1 Harddisk2 CdRom0 CdRom2]
     Assuming [Efi1 Efi0 CdRom1 Harddisk0] is ordered properly
     Output = [Efi1 Efi0 CdRom1 CdRom0 CdRom2 Harddisk0 Harddisk1 Harddisk2]

**/
VOID
GroupMultipleLegacyBootOption4SameType (
  VOID
  )
{
  EFI_STATUS                    Status;
  UINTN                         Index;
  UINTN                         DeviceIndex;
  UINTN                         DeviceTypeIndex[7];
  UINTN                         *NextIndex;
  UINT16                        OptionNumber;
  UINT16                        *BootOrder;
  UINTN                         BootOrderSize;
  CHAR16                        OptionName[sizeof ("Boot####")];
  EFI_BOOT_MANAGER_LOAD_OPTION  BootOption;

  SetMem (DeviceTypeIndex, sizeof (DeviceTypeIndex), 0xff);

  GetEfiGlobalVariable2 (L"BootOrder", (VOID **)&BootOrder, &BootOrderSize);
  if (BootOrder == NULL) {
    return;
  }

  for (Index = 0; Index < BootOrderSize / sizeof (UINT16); Index++) {
    UnicodeSPrint (OptionName, sizeof (OptionName), L"Boot%04x", BootOrder[Index]);
    Status = EfiBootManagerVariableToLoadOption (OptionName, &BootOption);
    ASSERT_EFI_ERROR (Status);

    if ((DevicePathType (BootOption.FilePath) == BBS_DEVICE_PATH) &&
        (DevicePathSubType (BootOption.FilePath) == BBS_BBS_DP))
    {
      //
      // Legacy Boot Option
      //
      DEBUG ((DEBUG_ERROR, "[BootManagerDxe] ==== Find Legacy Boot Option  0x%x! ==== \n", Index));
      ASSERT ((((BBS_BBS_DEVICE_PATH *)BootOption.FilePath)->DeviceType & 0xF) < ARRAY_SIZE (DeviceTypeIndex));
      NextIndex = &DeviceTypeIndex[((BBS_BBS_DEVICE_PATH *)BootOption.FilePath)->DeviceType & 0xF];

      if (*NextIndex == (UINTN)-1) {
        //
        // *NextIndex is the Index in BootOrder to put the next Option Number for the same type
        //
        *NextIndex = Index + 1;
      } else {
        //
        // insert the current boot option before *NextIndex, causing [*Next .. Index] shift right one position
        //
        OptionNumber = BootOrder[Index];
        CopyMem (&BootOrder[*NextIndex + 1], &BootOrder[*NextIndex], (Index - *NextIndex) * sizeof (UINT16));
        BootOrder[*NextIndex] = OptionNumber;

        //
        // Update the DeviceTypeIndex array to reflect the right shift operation
        //
        for (DeviceIndex = 0; DeviceIndex < ARRAY_SIZE (DeviceTypeIndex); DeviceIndex++) {
          if ((DeviceTypeIndex[DeviceIndex] != (UINTN)-1) && (DeviceTypeIndex[DeviceIndex] >= *NextIndex)) {
            DeviceTypeIndex[DeviceIndex]++;
          }
        }
      }
    }

    EfiBootManagerFreeLoadOption (&BootOption);
  }

  gRT->SetVariable (
         L"BootOrder",
         &gEfiGlobalVariableGuid,
         VAR_FLAG,
         BootOrderSize,
         BootOrder
         );
  FreePool (BootOrder);
}

/**
  This function converts an input device structure to a Unicode string.

  @param DevPath                  A pointer to the device path structure.

  @return A new allocated Unicode string that represents the device path.

**/
CHAR16 *
BmDevicePathToStr (
  IN EFI_DEVICE_PATH_PROTOCOL  *DevPath
  )
{
  EFI_STATUS                        Status;
  CHAR16                            *ToText;
  EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *DevPathToText;

  if (DevPath == NULL) {
    return NULL;
  }

  Status = gBS->LocateProtocol (
                  &gEfiDevicePathToTextProtocolGuid,
                  NULL,
                  (VOID **)&DevPathToText
                  );
  ASSERT_EFI_ERROR (Status);
  ToText = DevPathToText->ConvertDevicePathToText (
                            DevPath,
                            FALSE,
                            TRUE
                            );
  ASSERT (ToText != NULL);
  return ToText;
}

/**
  This function invokes Boot Manager. It then enumerate all boot options. If
  a boot option from the Boot Manager page is selected, Boot Manager will boot
  from this boot option.

**/
VOID
UpdateBootManager (
  VOID
  )
{
  UINTN                         Index;
  EFI_BOOT_MANAGER_LOAD_OPTION  *BootOption;
  UINTN                         BootOptionCount;
  EFI_STRING_ID                 Token;
  CHAR16                        *HelpString;
  EFI_STRING_ID                 HelpToken;
  UINT16                        *TempStr;
  EFI_HII_HANDLE                HiiHandle;
  UINTN                         TempSize;
  VOID                          *StartOpCodeHandle;
  VOID                          *EndOpCodeHandle;
  EFI_IFR_GUID_LABEL            *StartLabel;
  EFI_IFR_GUID_LABEL            *EndLabel;
  UINT16                        DeviceType;
  BOOLEAN                       IsLegacyOption;
  BOOLEAN                       NeedEndOp;
  UINTN                         MaxLen;
  EFI_STATUS                    Status;
  EFI_LOADED_IMAGE_PROTOCOL     *LoadedImage;
  EFI_DEVICE_PATH_PROTOCOL      *DevicePath;

  DeviceType = (UINT16)-1;

  //
  // for better user experience
  // 1. User changes HD configuration (e.g.: unplug HDD), here we have a chance to remove the HDD boot option
  // 2. User enables/disables UEFI PXE, here we have a chance to add/remove EFI Network boot option
  //
  EfiBootManagerRefreshAllBootOption ();

  //
  // BdsDxe doesn't group the legacy boot options for the same device type
  // It's UI's choice.
  //
  GroupMultipleLegacyBootOption4SameType ();

  BootOption = EfiBootManagerGetLoadOptions (&BootOptionCount, LoadOptionTypeBoot);
  if (BootOption == NULL) {
    //
    // No boot option available, return directly
    //
    return;
  }

  HiiHandle = gBootManagerPrivate.HiiHandle;

  //
  // Allocate space for creation of UpdateData Buffer
  //
  StartOpCodeHandle = HiiAllocateOpCodeHandle ();
  if (StartOpCodeHandle == NULL) {
    ASSERT (StartOpCodeHandle != NULL);
    return;
  }

  EndOpCodeHandle = HiiAllocateOpCodeHandle ();
  if (EndOpCodeHandle == NULL) {
    HiiFreeOpCodeHandle (StartOpCodeHandle);
    ASSERT (EndOpCodeHandle != NULL);
    return;
  }

  //
  // 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_BOOT_OPTION;

  //
  // 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_BOOT_OPTION_END;
  mKeyInput              = 0;
  NeedEndOp              = FALSE;

  //
  // Get UiApp FilePath
  //
  Status = gBS->HandleProtocol (
                  gImageHandle,
                  &gEfiLoadedImageProtocolGuid,
                  (VOID **)&LoadedImage
                  );
  ASSERT_EFI_ERROR (Status);

  DevicePath = DevicePathFromHandle (LoadedImage->DeviceHandle);
  ASSERT (DevicePath != NULL);

  DevicePath = AppendDevicePathNode (
                 DevicePath,
                 LoadedImage->FilePath
                 );

  for (Index = 0; Index < BootOptionCount; Index++) {
    //
    // At this stage we are creating a menu entry, thus the Keys are reproduceable
    //
    mKeyInput++;

    //
    // Don't display hidden boot options, but retain inactive ones.
    //
    if ((BootOption[Index].Attributes & LOAD_OPTION_HIDDEN) != 0) {
      continue;
    }

    //
    // Don't display UiApp within the boot options
    //
    if (CompareMem (DevicePath, BootOption[Index].FilePath, GetDevicePathSize (DevicePath)) == 0) {
      continue;
    }

    //
    // Group the legacy boot option in the sub title created dynamically
    //
    IsLegacyOption = (BOOLEAN)(
                               (DevicePathType (BootOption[Index].FilePath) == BBS_DEVICE_PATH) &&
                               (DevicePathSubType (BootOption[Index].FilePath) == BBS_BBS_DP)
                               );

    if (!IsLegacyOption && NeedEndOp) {
      NeedEndOp = FALSE;
      HiiCreateEndOpCode (StartOpCodeHandle);
    }

    if (IsLegacyOption && (DeviceType != ((BBS_BBS_DEVICE_PATH *)BootOption[Index].FilePath)->DeviceType)) {
      if (NeedEndOp) {
        HiiCreateEndOpCode (StartOpCodeHandle);
      }

      DeviceType = ((BBS_BBS_DEVICE_PATH *)BootOption[Index].FilePath)->DeviceType;
      Token      = HiiSetString (
                     HiiHandle,
                     0,
                     mDeviceTypeStr[
                                    MIN (DeviceType & 0xF, ARRAY_SIZE (mDeviceTypeStr) - 1)
                     ],
                     NULL
                     );
      HiiCreateSubTitleOpCode (StartOpCodeHandle, Token, 0, 0, 1);
      NeedEndOp = TRUE;
    }

    ASSERT (BootOption[Index].Description != NULL);

    Token = HiiSetString (HiiHandle, 0, BootOption[Index].Description, NULL);

    TempStr    = BmDevicePathToStr (BootOption[Index].FilePath);
    TempSize   = StrSize (TempStr);
    HelpString = AllocateZeroPool (TempSize + StrSize (L"Device Path : "));
    MaxLen     = (TempSize + StrSize (L"Device Path : "))/sizeof (CHAR16);
    ASSERT (HelpString != NULL);
    StrCatS (HelpString, MaxLen, L"Device Path : ");
    StrCatS (HelpString, MaxLen, TempStr);

    HelpToken = HiiSetString (HiiHandle, 0, HelpString, NULL);

    HiiCreateActionOpCode (
      StartOpCodeHandle,
      mKeyInput,
      Token,
      HelpToken,
      EFI_IFR_FLAG_CALLBACK,
      0
      );
  }

  if (NeedEndOp) {
    HiiCreateEndOpCode (StartOpCodeHandle);
  }

  HiiUpdateForm (
    HiiHandle,
    &mBootManagerGuid,
    BOOT_MANAGER_FORM_ID,
    StartOpCodeHandle,
    EndOpCodeHandle
    );

  HiiFreeOpCodeHandle (StartOpCodeHandle);
  HiiFreeOpCodeHandle (EndOpCodeHandle);

  EfiBootManagerFreeLoadOptions (BootOption, BootOptionCount);
}

/**
  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
BootManagerExtractConfig (
  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL  *This,
  IN  CONST EFI_STRING                      Request,
  OUT EFI_STRING                            *Progress,
  OUT EFI_STRING                            *Results
  )
{
  if ((Progress == NULL) || (Results == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  *Progress = Request;
  return EFI_NOT_FOUND;
}

/**
  This function processes the results of changes in configuration.


  @param This            Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
  @param Configuration   A null-terminated Unicode string in <ConfigResp> format.
  @param Progress        A pointer to a string filled in with the offset of the most
                         recent '&' before the first failing name/value pair (or the
                         beginning of the string if the failure is in the first
                         name/value pair) or the terminating NULL if all was successful.

  @retval  EFI_SUCCESS            The Results is processed successfully.
  @retval  EFI_INVALID_PARAMETER  Configuration is NULL.
  @retval  EFI_NOT_FOUND          Routing data doesn't match any storage in this driver.

**/
EFI_STATUS
EFIAPI
BootManagerRouteConfig (
  IN  CONST EFI_HII_CONFIG_ACCESS_PROTOCOL  *This,
  IN  CONST EFI_STRING                      Configuration,
  OUT EFI_STRING                            *Progress
  )
{
  if ((Configuration == NULL) || (Progress == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  *Progress = Configuration;

  return EFI_NOT_FOUND;
}

/**
  Initial the boot mode related parameters.

**/
VOID
BmInitialBootModeInfo (
  VOID
  )
{
  EFI_STATUS                       Status;
  EFI_GRAPHICS_OUTPUT_PROTOCOL     *GraphicsOutput;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *SimpleTextOut;
  UINTN                            BootTextColumn;
  UINTN                            BootTextRow;

  if (mBmModeInitialized) {
    return;
  }

  //
  // After the console is ready, get current video resolution
  // and text mode before launching setup at first time.
  //
  Status = gBS->HandleProtocol (
                  gST->ConsoleOutHandle,
                  &gEfiGraphicsOutputProtocolGuid,
                  (VOID **)&GraphicsOutput
                  );
  if (EFI_ERROR (Status)) {
    GraphicsOutput = NULL;
  }

  Status = gBS->HandleProtocol (
                  gST->ConsoleOutHandle,
                  &gEfiSimpleTextOutProtocolGuid,
                  (VOID **)&SimpleTextOut
                  );
  if (EFI_ERROR (Status)) {
    SimpleTextOut = NULL;
  }

  if (GraphicsOutput != NULL) {
    //
    // Get current video resolution and text mode.
    //
    mBmBootHorizontalResolution = GraphicsOutput->Mode->Info->HorizontalResolution;
    mBmBootVerticalResolution   = GraphicsOutput->Mode->Info->VerticalResolution;
  }

  if (SimpleTextOut != NULL) {
    Status = SimpleTextOut->QueryMode (
                              SimpleTextOut,
                              SimpleTextOut->Mode->Mode,
                              &BootTextColumn,
                              &BootTextRow
                              );
    mBmBootTextModeColumn = (UINT32)BootTextColumn;
    mBmBootTextModeRow    = (UINT32)BootTextRow;
  }

  //
  // Get user defined text mode for setup.
  //
  mBmSetupHorizontalResolution = PcdGet32 (PcdSetupVideoHorizontalResolution);
  mBmSetupVerticalResolution   = PcdGet32 (PcdSetupVideoVerticalResolution);
  mBmSetupTextModeColumn       = PcdGet32 (PcdSetupConOutColumn);
  mBmSetupTextModeRow          = PcdGet32 (PcdSetupConOutRow);

  mBmModeInitialized = TRUE;
}

/**
  This call back function is registered with Boot Manager formset.
  When user selects a boot option, this call back function will
  be triggered. The boot option is saved for later processing.


  @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_INVALID_PARAMETER The setup browser call this function with invalid parameters.

**/
EFI_STATUS
EFIAPI
BootManagerCallback (
  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
  )
{
  EFI_BOOT_MANAGER_LOAD_OPTION  *BootOption;
  UINTN                         BootOptionCount;
  EFI_INPUT_KEY                 Key;

  if (Action == EFI_BROWSER_ACTION_FORM_OPEN) {
    //
    // Means enter the boot manager form.
    // Update the boot manage page,because the boot option may changed.
    //
    if (QuestionId == 0x1212) {
      UpdateBootManager ();
    }

    return EFI_SUCCESS;
  }

  if (Action != EFI_BROWSER_ACTION_CHANGED) {
    //
    // Do nothing for other UEFI Action. Only do call back when data is changed.
    //
    return EFI_UNSUPPORTED;
  }

  if ((Value == NULL) || (ActionRequest == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  BootOption = EfiBootManagerGetLoadOptions (&BootOptionCount, LoadOptionTypeBoot);
  if (BootOption == NULL) {
    return EFI_UNSUPPORTED;
  }

  //
  // Clear  the  screen  before.
  //
  gST->ConOut->SetAttribute (gST->ConOut, EFI_TEXT_ATTR (EFI_LIGHTGRAY, EFI_BLACK));
  gST->ConOut->ClearScreen (gST->ConOut);

  //
  // check any reset required change is applied? if yes, reset system
  //
  BmSetupResetReminder ();

  //
  // parse the selected option
  //
  BmSetConsoleMode (FALSE);
  EfiBootManagerBoot (&BootOption[QuestionId - 1]);
  BmSetConsoleMode (TRUE);

  if (EFI_ERROR (BootOption[QuestionId - 1].Status)) {
    gST->ConOut->OutputString (
                   gST->ConOut,
                   HiiGetString (gBootManagerPrivate.HiiHandle, STRING_TOKEN (STR_ANY_KEY_CONTINUE), NULL)
                   );
    gST->ConIn->ReadKeyStroke (gST->ConIn, &Key);
  }

  EfiBootManagerFreeLoadOptions (BootOption, BootOptionCount);

  return EFI_SUCCESS;
}

/**

  Install Boot Manager Menu driver.

  @param ImageHandle     The image handle.
  @param SystemTable     The system table.

  @retval  EFI_SUCEESS  Install Boot manager menu success.
  @retval  Other        Return error status.

**/
EFI_STATUS
EFIAPI
BootManagerUiLibConstructor (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;

  //
  // Install Device Path Protocol and Config Access protocol to driver handle
  //
  gBootManagerPrivate.DriverHandle = NULL;
  Status                           = gBS->InstallMultipleProtocolInterfaces (
                                            &gBootManagerPrivate.DriverHandle,
                                            &gEfiDevicePathProtocolGuid,
                                            &mBootManagerHiiVendorDevicePath,
                                            &gEfiHiiConfigAccessProtocolGuid,
                                            &gBootManagerPrivate.ConfigAccess,
                                            NULL
                                            );
  ASSERT_EFI_ERROR (Status);

  //
  // Publish our HII data
  //
  gBootManagerPrivate.HiiHandle = HiiAddPackages (
                                    &mBootManagerGuid,
                                    gBootManagerPrivate.DriverHandle,
                                    BootManagerVfrBin,
                                    BootManagerUiLibStrings,
                                    NULL
                                    );
  ASSERT (gBootManagerPrivate.HiiHandle != NULL);

  BmInitialBootModeInfo ();

  return EFI_SUCCESS;
}

/**
  Unloads the application and its installed protocol.

  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
  @param[in]  SystemTable       System Table

  @retval EFI_SUCCESS           The image has been unloaded.
**/
EFI_STATUS
EFIAPI
BootManagerUiLibDestructor (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;

  Status = gBS->UninstallMultipleProtocolInterfaces (
                  gBootManagerPrivate.DriverHandle,
                  &gEfiDevicePathProtocolGuid,
                  &mBootManagerHiiVendorDevicePath,
                  &gEfiHiiConfigAccessProtocolGuid,
                  &gBootManagerPrivate.ConfigAccess,
                  NULL
                  );
  ASSERT_EFI_ERROR (Status);

  HiiRemovePackages (gBootManagerPrivate.HiiHandle);

  return EFI_SUCCESS;
}