{
    This file is part of the Free Pascal run time library.
    Copyright (c) 2017 by Olivier Coursière

    FPC Pascal system unit for UEFI target.

    See the file COPYING.FPC, included in this distribution,
    for details about the copyright.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 **********************************************************************}
unit System;

interface

{$define DISABLE_NO_THREAD_MANAGER}
 
{ include system-independent routine headers }
{$I systemh.inc}

const
 LineEnding = #13#10;
 LFNSupport = true;
 DirectorySeparator = '\';
 DriveSeparator = ':';
 ExtensionSeparator = '.';
 PathSeparator = ';';
 AllowDirectorySeparators : set of char = ['\'];
 AllowDriveSeparators : set of char = [];

var
{ C compatible arguments }
  argc: LongWord;
  argvw: PPWideChar;
  argv: PPChar;
 
const
{ Default filehandles }
  UnusedHandle    : THandle = -1;
  StdInputHandle  : THandle = 0;
  StdOutputHandle : THandle = 1;
  StdErrorHandle  : THandle = 2;

{ FileNameCaseSensitive and FileNameCasePreserving are defined separately below!!! }
 maxExitCode = High(ErrorCode);
 MaxPathLen = High(Word);
 AllFilesMask = '*';

const
  // UEFI is not case sensitive because of defaut FAT32 file system
  FileNameCaseSensitive : boolean = false;
  FileNameCasePreserving: boolean = true;
  // todo: check whether this is really the case on UEFI...
  CtrlZMarksEOF: boolean = true; (* #26 is considered as end of file *)

  sLineBreak = LineEnding;
  DefaultTextLineBreakStyle : TTextLineBreakStyle = tlbsCRLF;

{ Basic EFI definitions }

{$IFDEF FPC}
{$PACKRECORDS C}
{$ENDIF}

    const
      EFI_SYSTEM_TABLE_SIGNATURE = $5453595320494249;
      EFI_RUNTIME_SERVICES_SIGNATURE = $56524553544e5552;
      EFI_BOOT_SERVICES_SIGNATURE = $56524553544f4f42;

	const
	  EFI_SUCCESS = 0;
	  EFI_LOAD_ERROR = 1;
	  EFI_INVALID_PARAMETER = 2;
	  EFI_UNSUPPORTED = 3;
	  EFI_OUT_OF_RESOURCES = 9;
	  EFI_NOT_FOUND = 14;
	  
type
  EFI_HANDLE = Cardinal;
  EFI_EVENT = pointer;
  EFI_STATUS = Cardinal;

    type
      EFI_INPUT_KEY = record
          ScanCode : UINT16;
          UnicodeChar : WideChar;
        end;

Type
    PCHAR16  = ^WideChar;
    PEFI_INPUT_KEY  = ^EFI_INPUT_KEY;
    UINTN = Cardinal;
    PUINTN  = ^UINTN;
    P_SIMPLE_TEXT_OUTPUT_INTERFACE = ^_SIMPLE_TEXT_OUTPUT_INTERFACE;
    P_SIMPLE_INPUT_INTERFACE  = ^_SIMPLE_INPUT_INTERFACE;


      EFI_TEXT_RESET = function (This:P_SIMPLE_TEXT_OUTPUT_INTERFACE; ExtendedVerification:BOOLEAN):EFI_STATUS;cdecl;
    {EFIAPI }    {IN }    {IN }
      EFI_TEXT_OUTPUT_STRING = function (This:P_SIMPLE_TEXT_OUTPUT_INTERFACE; _String:PCHAR16):EFI_STATUS;cdecl;
    {EFIAPI }    {IN }    {IN }
      EFI_TEXT_TEST_STRING = function (This:P_SIMPLE_TEXT_OUTPUT_INTERFACE; _String:PCHAR16):EFI_STATUS;cdecl;
    {EFIAPI }    {IN }    {IN }    {OUT }    {OUT }
      EFI_TEXT_QUERY_MODE = function (This:P_SIMPLE_TEXT_OUTPUT_INTERFACE; ModeNumber:UINTN; Columns:PUINTN; Rows:PUINTN):EFI_STATUS;cdecl;
    {EFIAPI }    {IN }    {IN }
      EFI_TEXT_SET_MODE = function (This:P_SIMPLE_TEXT_OUTPUT_INTERFACE; ModeNumber:UINTN):EFI_STATUS;cdecl;
    {EFIAPI }    {IN }    {IN }
      EFI_TEXT_SET_ATTRIBUTE = function (This:P_SIMPLE_TEXT_OUTPUT_INTERFACE; Attribute:UINTN):EFI_STATUS;cdecl;

      EFI_TEXT_CLEAR_SCREEN = function (This:P_SIMPLE_TEXT_OUTPUT_INTERFACE):EFI_STATUS;cdecl;
    {EFIAPI }    {IN }    {IN }    {IN }
      EFI_TEXT_SET_CURSOR_POSITION = function (This:P_SIMPLE_TEXT_OUTPUT_INTERFACE; Column:UINTN; Row:UINTN):EFI_STATUS;cdecl;
    {EFIAPI }    {IN }    {IN }
      EFI_TEXT_ENABLE_CURSOR = function (This:P_SIMPLE_TEXT_OUTPUT_INTERFACE; Enable:BOOLEAN):EFI_STATUS;cdecl;
    { current settings }

      SIMPLE_TEXT_OUTPUT_MODE = record
          MaxMode : INT32;
          Mode : INT32;
          Attribute : INT32;
          CursorColumn : INT32;
          CursorRow : INT32;
          CursorVisible : BOOLEAN;
        end;
    { Current mode }

      _SIMPLE_TEXT_OUTPUT_INTERFACE = record
          Reset : EFI_TEXT_RESET;
          OutputString : EFI_TEXT_OUTPUT_STRING;
          TestString : EFI_TEXT_TEST_STRING;
          QueryMode : EFI_TEXT_QUERY_MODE;
          SetMode : EFI_TEXT_SET_MODE;
          SetAttribute : EFI_TEXT_SET_ATTRIBUTE;
          ClearScreen : EFI_TEXT_CLEAR_SCREEN;
          SetCursorPosition : EFI_TEXT_SET_CURSOR_POSITION;
          EnableCursor : EFI_TEXT_ENABLE_CURSOR;
          Mode : ^SIMPLE_TEXT_OUTPUT_MODE;
        end;
      SIMPLE_TEXT_OUTPUT_INTERFACE = _SIMPLE_TEXT_OUTPUT_INTERFACE;
//    P_SIMPLE_TEXT_OUTPUT_INTERFACE  = ^_SIMPLE_TEXT_OUTPUT_INTERFACE;

      EFI_INPUT_RESET = function (This:P_SIMPLE_INPUT_INTERFACE; ExtendedVerification:BOOLEAN):EFI_STATUS;cdecl;
    {EFIAPI }    {IN }    {OUT }
      EFI_INPUT_READ_KEY = function (This:P_SIMPLE_INPUT_INTERFACE; Key:PEFI_INPUT_KEY):EFI_STATUS;cdecl;

      _SIMPLE_INPUT_INTERFACE = record
          Reset : EFI_INPUT_RESET;
          ReadKeyStroke : EFI_INPUT_READ_KEY;
          WaitForKey : EFI_EVENT;
        end;
      SIMPLE_INPUT_INTERFACE = _SIMPLE_INPUT_INTERFACE;

//    P_SIMPLE_INPUT_INTERFACE  = ^_SIMPLE_INPUT_INTERFACE;

    type
      _EFI_TABLE_HEARDER = record
          Signature : UINT64;
          Revision : UINT32;
          HeaderSize : UINT32;
          CRC32 : UINT32;
          Reserved : UINT32;
        end;
      EFI_TABLE_HEADER = _EFI_TABLE_HEARDER;

	type
      EFI_GET_TIME = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_SET_TIME = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_GET_WAKEUP_TIME = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_SET_WAKEUP_TIME = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_SET_VIRTUAL_ADDRESS_MAP = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_CONVERT_POINTER = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_GET_VARIABLE = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_GET_NEXT_VARIABLE_NAME = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_SET_VARIABLE = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_GET_NEXT_HIGH_MONO_COUNT = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_RESET_SYSTEM = function ((* TODO *)):EFI_STATUS;cdecl;

    type
      EFI_RUNTIME_SERVICES = record
          Hdr : EFI_TABLE_HEADER;
          GetTime : EFI_GET_TIME;
          SetTime : EFI_SET_TIME;
          GetWakeupTime : EFI_GET_WAKEUP_TIME;
          SetWakeupTime : EFI_SET_WAKEUP_TIME;
          SetVirtualAddressMap : EFI_SET_VIRTUAL_ADDRESS_MAP;
          ConvertPointer : EFI_CONVERT_POINTER;
          GetVariable : EFI_GET_VARIABLE;
          GetNextVariableName : EFI_GET_NEXT_VARIABLE_NAME;
          SetVariable : EFI_SET_VARIABLE;
          GetNextHighMonotonicCount : EFI_GET_NEXT_HIGH_MONO_COUNT;
          ResetSystem : EFI_RESET_SYSTEM;
        end;

    EFI_ALLOCATE_TYPE = (AllocateAnyPages,AllocateMaxAddress,AllocateAddress,
      MaxAllocateType);
  {Preseve the attr on any range supplied. }
  {ConventialMemory must have WB,SR,SW when supplied. }
  {When allocating from ConventialMemory always make it WB,SR,SW }
  {When returning to ConventialMemory always make it WB,SR,SW }
  {When getting the memory map, or on RT for runtime types }

    EFI_MEMORY_TYPE = (EfiReservedMemoryType,EfiLoaderCode,EfiLoaderData,
      EfiBootServicesCode,EfiBootServicesData,
      EfiRuntimeServicesCode,EfiRuntimeServicesData,
      EfiConventionalMemory,EfiUnusableMemory,
      EfiACPIReclaimMemory,EfiACPIMemoryNVS,
      EfiMemoryMappedIO,EfiMemoryMappedIOPortSpace,
      EfiPalCode,EfiMaxMemoryType);

	type
	  EFI_PHYSICAL_ADDRESS = UINT64;
	
	type
      EFI_RAISE_TPL = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_RESTORE_TPL = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_ALLOCATE_PAGES = function (aType : EFI_ALLOCATE_TYPE; 
      	MemoryType : EFI_MEMORY_TYPE; NoPages : UINTN; 
      	var Memory : EFI_PHYSICAL_ADDRESS(* TODO *)):EFI_STATUS;cdecl;
      EFI_FREE_PAGES = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_GET_MEMORY_MAP = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_ALLOCATE_POOL = function (PoolType : EFI_MEMORY_TYPE; Size : UINT32; 
      	var Buffer : Pointer):EFI_STATUS;cdecl;
      EFI_FREE_POOL = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_CREATE_EVENT = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_SET_TIMER = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_WAIT_FOR_EVENT = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_SIGNAL_EVENT = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_CLOSE_EVENT = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_CHECK_EVENT = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_INSTALL_PROTOCOL_INTERFACE = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_REINSTALL_PROTOCOL_INTERFACE = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_UNINSTALL_PROTOCOL_INTERFACE = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_HANDLE_PROTOCOL = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_REGISTER_PROTOCOL_NOTIFY = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_LOCATE_HANDLE = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_LOCATE_DEVICE_PATH = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_INSTALL_CONFIGURATION_TABLE = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_IMAGE_LOAD = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_IMAGE_START = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_EXIT = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_IMAGE_UNLOAD = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_EXIT_BOOT_SERVICES = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_GET_NEXT_MONOTONIC_COUNT = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_STALL = function (Microseconds : UINT32):EFI_STATUS;cdecl;
      EFI_SET_WATCHDOG_TIMER = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_CONNECT_CONTROLLER = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_DISCONNECT_CONTROLLER = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_OPEN_PROTOCOL = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_CLOSE_PROTOCOL = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_OPEN_PROTOCOL_INFORMATION = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_PROTOCOLS_PER_HANDLE = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_LOCATE_HANDLE_BUFFER = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_LOCATE_PROTOCOL = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_INSTALL_MULTIPLE_PROTOCOL_INTERFACES = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_UNINSTALL_MULTIPLE_PROTOCOL_INTERFACES = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_CALCULATE_CRC32 = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_COPY_MEM = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_SET_MEM = function ((* TODO *)):EFI_STATUS;cdecl;
      EFI_CREATE_EVENT_EX = function ((* TODO *)):EFI_STATUS;cdecl;

    type
      _EFI_BOOT_SERVICES = record
          Hdr : EFI_TABLE_HEADER;
          RaiseTPL : EFI_RAISE_TPL;
          RestoreTPL : EFI_RESTORE_TPL;
          AllocatePages : EFI_ALLOCATE_PAGES;
          FreePages : EFI_FREE_PAGES;
          GetMemoryMap : EFI_GET_MEMORY_MAP;
          AllocatePool : EFI_ALLOCATE_POOL;
          FreePool : EFI_FREE_POOL;
          CreateEvent : EFI_CREATE_EVENT;
          SetTimer : EFI_SET_TIMER;
          WaitForEvent : EFI_WAIT_FOR_EVENT;
          SignalEvent : EFI_SIGNAL_EVENT;
          CloseEvent : EFI_CLOSE_EVENT;
          CheckEvent : EFI_CHECK_EVENT;
          InstallProtocolInterface : EFI_INSTALL_PROTOCOL_INTERFACE;
          ReinstallProtocolInterface : EFI_REINSTALL_PROTOCOL_INTERFACE;
          UninstallProtocolInterface : EFI_UNINSTALL_PROTOCOL_INTERFACE;
          HandleProtocol : EFI_HANDLE_PROTOCOL;
          PCHandleProtocol : EFI_HANDLE_PROTOCOL;
          RegisterProtocolNotify : EFI_REGISTER_PROTOCOL_NOTIFY;
          LocateHandle : EFI_LOCATE_HANDLE;
          LocateDevicePath : EFI_LOCATE_DEVICE_PATH;
          InstallConfigurationTable : EFI_INSTALL_CONFIGURATION_TABLE;
          LoadImage : EFI_IMAGE_LOAD;
          StartImage : EFI_IMAGE_START;
          Exit : EFI_EXIT;
          UnloadImage : EFI_IMAGE_UNLOAD;
          ExitBootServices : EFI_EXIT_BOOT_SERVICES;
          GetNextMonotonicCount : EFI_GET_NEXT_MONOTONIC_COUNT;
          Stall : EFI_STALL;
          SetWatchdogTimer : EFI_SET_WATCHDOG_TIMER;
          ConnectController : EFI_CONNECT_CONTROLLER;
          DisconnectController : EFI_DISCONNECT_CONTROLLER;
          OpenProtocol : EFI_OPEN_PROTOCOL;
          CloseProtocol : EFI_CLOSE_PROTOCOL;
          OpenProtocolInformation : EFI_OPEN_PROTOCOL_INFORMATION;
          ProtocolsPerHandle : EFI_PROTOCOLS_PER_HANDLE;
          LocateHandleBuffer : EFI_LOCATE_HANDLE_BUFFER;
          LocateProtocol : EFI_LOCATE_PROTOCOL;
          InstallMultipleProtocolInterfaces : EFI_INSTALL_MULTIPLE_PROTOCOL_INTERFACES;
          UninstallMultipleProtocolInterfaces : EFI_UNINSTALL_MULTIPLE_PROTOCOL_INTERFACES;
          CalculateCrc32 : EFI_CALCULATE_CRC32;
          CopyMem : EFI_COPY_MEM;
          SetMem : EFI_SET_MEM;
          CreateEventEx : EFI_CREATE_EVENT_EX;
        end;
      EFI_BOOT_SERVICES = _EFI_BOOT_SERVICES;
               
type
      _EFI_SYSTEM_TABLE = record
          Hdr : EFI_TABLE_HEADER;
          FirmwareVendor : ^WideChar;
          FirmwareRevision : UINT32;
          ConsoleInHandle : EFI_HANDLE;
          ConIn : ^SIMPLE_INPUT_INTERFACE;
          ConsoleOutHandle : EFI_HANDLE;
          ConOut : ^SIMPLE_TEXT_OUTPUT_INTERFACE;
          StandardErrorHandle : EFI_HANDLE;
          StdErr : ^SIMPLE_TEXT_OUTPUT_INTERFACE;
          RuntimeServices : ^EFI_RUNTIME_SERVICES;
          BootServices : ^EFI_BOOT_SERVICES;
{          NumberOfTableEntries : UINTN;
          ConfigurationTable : ^EFI_CONFIGURATION_TABLE;}
        end;
      EFI_SYSTEM_TABLE = _EFI_SYSTEM_TABLE;
      PEFI_SYSTEM_TABLE = ^EFI_SYSTEM_TABLE;

procedure Check(systemTable : EFI_SYSTEM_TABLE; status : EFI_STATUS);
procedure Check(status : EFI_STATUS);

var
  sysTable : EFI_SYSTEM_TABLE;
  //PSysTable : PEFI_SYSTEM_TABLE = nil;
  StdOutput : ^SIMPLE_TEXT_OUTPUT_INTERFACE;

type
  THeapPointer = ^pointer;
var
  heapstartpointer : THeapPointer;
  heapstart : pointer;//external;//external name 'HEAP';
  myheapsize : longint; //external;//external name 'HEAPSIZE';
  myheaprealsize : longint;
  heap_handle : longint;

procedure Init(systemTable : EFI_SYSTEM_TABLE);

procedure PascalMain;stdcall;external name 'PASCALMAIN';

implementation

{ include system independent routines }
{$I system.inc}

function paramcount : longint;
begin
  Result := 0;
end;

function paramstr(l : longint) : string;
begin
  Result := '';
end;

procedure randomize;
begin
end;

procedure Check(status : EFI_STATUS);
begin
  Check(sysTable, status);
end;

procedure Check(systemTable : EFI_SYSTEM_TABLE; status : EFI_STATUS);
var
  msg : string;
begin
  msg := 'Error';
  
  case status of
  	EFI_SUCCESS:
  	  begin
  	  	// Success
  	  	msg := 'Success';
  	  end;
  	EFI_INVALID_PARAMETER:
  	  begin
  	    // Invalid
  	    msg := 'Invalid';
  	  end;
  	EFI_OUT_OF_RESOURCES:
  	  begin
  	    // Out of resources
  	    msg := 'Out of resources';
  	  end;
  	1, 3..8, 10 :
  	  begin
  	    msg := 'Error 1';
  	  end;
  	11..20 :
  	  begin
  	    msg := 'Error 11';
  	  end;
  	21..30 :
  	  begin
  	    msg := 'Error 21';
  	  end;
  	31..40 :
  	  begin
  	    msg := 'Error 31';
  	  end;
  	41..50 :
  	  begin
  	    msg := 'Error 41';
  	  end;
  	51..60 :
  	  begin
  	    msg := 'Error 51';
  	  end;
  	61..70 :
  	  begin
  	    msg := 'Error 61';
  	  end;
  	71..80 :
  	  begin
  	    msg := 'Error 71';
  	  end;
  	81..90 :
  	  begin
  	    msg := 'Error 81';
  	  end;
  	91..100 :
  	  begin
  	    msg := 'Error 91';
  	  end;
  	101..MaxInt :
  	  begin
  	    msg := 'Error 101';
  	  end;
  	else
  	  begin
  	  	// Error
  	    msg := 'Error';
  	  end;
  end;

  WriteLn('');
  WriteLn(msg);
end;

procedure Init(systemTable : EFI_SYSTEM_TABLE);
begin
  DefaultSystemCodePage := CP_UTF16;
  DefaultRTLFileSystemCodePage := CP_UTF16;
  DefaultFileSystemCodePage := CP_UTF16;
  SetMultiByteConversionCodePage(CP_UTF16);

  SysTable := systemTable;
  
  { Setup heap }
  myheapsize:=4096*100;// $ 20000;
  myheaprealsize:=4096*100;// $ 20000;
  heapstart:=nil;
  heapstartpointer := nil;
  heapstartpointer := SysOSAlloc(4096*100);
  if heapstartpointer <> nil then
  begin
    SysTable.ConOut^.OutputString(SysTable.ConOut, 'heapStartPointer initialization' + #13#10);
    FillChar(heapstartpointer^, 4096*100, #0);
  end
  else
  begin
    SysTable.ConOut^.OutputString(SysTable.ConOut, 'heapStartPointer not initialized' + #13#10);
  end;

  WriteLn('Init');

  SysInitExceptions;
  initunicodestringmanager;
{ Setup IO }
  SysInitStdIO;
{ Reset IO Error }
  InOutRes:=0;

  SysTable.ConOut^.OutputString(SysTable.ConOut, #13#10);
end;

function EFI_MAIN( imageHandle: EFI_HANDLE; systemTable : PEFI_SYSTEM_TABLE): EFI_STATUS; cdecl; [public, alias: 'EFI_MAIN'];
begin
 try
  SysTable := systemTable^;

  SysTable.ConOut^.OutputString(SysTable.ConOut, 'EFI_MAIN start' + #13#10);


  StackLength := CheckInitialStkLen ($1000000); 
  StackBottom := StackTop - StackLength; 
  
  { Setup heap }
  myheapsize:=4096*100;// $ 20000;
  myheaprealsize:=4096*100;// $ 20000;
  heapstart:=nil;
  heapstartpointer := nil;
  heapstartpointer := SysOSAlloc(4096*100);
  FillChar(heapstartpointer^, myheaprealsize, #0);
  InitHeap;

  DefaultSystemCodePage := CP_UTF16;
  DefaultRTLFileSystemCodePage := CP_UTF16;
  DefaultFileSystemCodePage := CP_UTF16;
  SetMultiByteConversionCodePage(CP_UTF16);

  WriteLn('start');

  if heapstartpointer <> nil then
  begin
    SysTable.ConOut^.OutputString(SysTable.ConOut, 'heapStartPointer initialization' + #13#10);
    FillChar(heapstartpointer^, 4096*100, #0);
  end
  else
  begin
    SysTable.ConOut^.OutputString(SysTable.ConOut, 'heapStartPointer not initialized' + #13#10);
  end;
  SysInitExceptions;
  initunicodestringmanager;
{ Setup IO }
  SysInitStdIO;
{ Reset IO Error }
  InOutRes:=0;

  SysTable.ConOut^.OutputString(SysTable.ConOut, #13#10);

  PascalMain;
  WriteLn('End of EFI_MAIN');
 except
   WriteLn('Exception in EFI_MAIN');
 end;
end;
{*****************************************************************************
                         System Dependent Exit code
*****************************************************************************}

Procedure system_exit;
begin
  WriteLn('system_exit');
end;

procedure SysInitStdIO;
begin
  { Setup stdin, stdout and stderr, for GUI apps redirect stderr,stdout to be
    displayed in and messagebox }
  OpenStdIO(Input,fmInput,StdInputHandle);
  OpenStdIO(Output,fmOutput,StdOutputHandle);
  OpenStdIO(StdOut,fmOutput,StdOutputHandle);
  OpenStdIO(StdErr,fmOutput,StdErrorHandle);
end;

function GetProcessID: SizeUInt;
begin
  Result := 0;
end;

function CheckInitialStkLen(stklen : SizeUInt) : SizeUInt;
begin
  result := stklen;
end;

begin

end.