;
; Modified from http://x86asm.net/articles/uefi-programming-first-steps/
; Copyright © 2016 Pete Batard <pete@akeo.ie> - Public Domain
;

;for 32/64 portability and automatic natural align in structure definitions

struc int8
  . db ?
end struc

struc int16
  align 2
  . dw ?
end struc

struc int32
  align 4
  . dd ?
end struc

struc int64
  align 8
  . dq ?
end struc

struc intn
  align 8
  . dq ?
end struc

struc dptr
  align 8
  . dq ?
end struc

;symbols

EFIERR                  = 0x8000000000000000
EFI_SUCCESS             = 0
EFI_LOAD_ERROR          = EFIERR or 1
EFI_INVALID_PARAMETER   = EFIERR or 2
EFI_UNSUPPORTED         = EFIERR or 3
EFI_BAD_BUFFER_SIZE     = EFIERR or 4
EFI_BUFFER_TOO_SMALL    = EFIERR or 5
EFI_NOT_READY           = EFIERR or 6
EFI_DEVICE_ERROR        = EFIERR or 7
EFI_WRITE_PROTECTED     = EFIERR or 8
EFI_OUT_OF_RESOURCES    = EFIERR or 9
EFI_VOLUME_CORRUPTED    = EFIERR or 10
EFI_VOLUME_FULL         = EFIERR or 11
EFI_NO_MEDIA            = EFIERR or 12
EFI_MEDIA_CHANGED       = EFIERR or 13
EFI_NOT_FOUND           = EFIERR or 14
EFI_ACCESS_DENIED       = EFIERR or 15
EFI_NO_RESPONSE         = EFIERR or 16
EFI_NO_MAPPING          = EFIERR or 17
EFI_TIMEOUT             = EFIERR or 18
EFI_NOT_STARTED         = EFIERR or 19
EFI_ALREADY_STARTED     = EFIERR or 20
EFI_ABORTED             = EFIERR or 21
EFI_ICMP_ERROR          = EFIERR or 22
EFI_TFTP_ERROR          = EFIERR or 23
EFI_PROTOCOL_ERROR      = EFIERR or 24

EfiResetCold            = 0
EfiResetWarm            = 1
EfiResetShutdown        = 2

;helper macro for definition of relative structure member offsets

macro struct name
  virtual at 0
    name name
  end virtual
end macro

;structures

struc EFI_TABLE_HEADER
 .Signature    int64
 .Revision     int32
 .HeaderSize   int32
 .CRC32        int32
 .Reserved     int32
end struc
struct EFI_TABLE_HEADER

struc EFI_SYSTEM_TABLE
 .Hdr                  EFI_TABLE_HEADER
 .FirmwareVendor       dptr
 .FirmwareRevision     int32
 .ConsoleInHandle      dptr
 .ConIn                dptr
 .ConsoleOutHandle     dptr
 .ConOut               dptr
 .StandardErrorHandle  dptr
 .StdErr               dptr
 .RuntimeServices      dptr
 .BootServices	       dptr
 .NumberOfTableEntries intn
 .ConfigurationTable   dptr
end struc
struct EFI_SYSTEM_TABLE

struc EFI_RUNTIME_SERVICES
 .Hdr                       EFI_TABLE_HEADER
 .GetTime                   dptr
 .SetTime                   dptr
 .GetWakeupTime             dptr
 .SetWakeupTime             dptr
 .SetVirtualAddressMap      dptr
 .ConvertPointer            dptr
 .GetVariable               dptr
 .GetNextVariableName       dptr
 .SetVariable               dptr
 .GetNextHighMonotonicCount dptr
 .ResetSystem               dptr
 .UpdateCapsule             dptr
 .QueryCapsuleCapabilities  dptr
 .QueryVariableInfo         dptr
end struc
struct EFI_RUNTIME_SERVICES

struc SIMPLE_TEXT_OUTPUT_INTERFACE
 .Reset             dptr
 .OutputString      dptr
 .TestString        dptr
 .QueryMode         dptr
 .SetMode           dptr
 .SetAttribute	    dptr
 .ClearScreen	    dptr
 .SetCursorPosition dptr
 .EnableCursor      dptr
 .Mode              dptr
end struc
struct SIMPLE_TEXT_OUTPUT_INTERFACE

struc SIMPLE_TEXT_INPUT_INTERFACE
 .Reset             dptr
 .ReadKeyStroke     dptr
 .WaitForKey        dptr
end struc
struct SIMPLE_TEXT_INPUT_INTERFACE

struc EFI_INPUT_KEY
 .ScanCode          int16
 .UnicodeChar       int16
end struc
struct EFI_INPUT_KEY