OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2008, Intel Corporation
   4 ; All rights reserved. This program and the accompanying materials
   5 ; are licensed and made available under the terms and conditions of the BSD License
   6 ; which accompanies this distribution.  The full text of the license may be found at
   7 ; http://opensource.org/licenses/bsd-license.php
   8 ;
   9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 ;
  12 ; Module Name:
  13 ;
  14 ;   Reset-16Bit-vft0.asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   First code exectuted by processor after resetting.
  19 ;
  20 ;------------------------------------------------------------------------------
  21
  22 BITS    16
  23
  24 earlyInit_Real16:
  25
  26         jmp     real16InitSerialPort
  27 real16SerialPortInitReturn:
  28
  29         jmp     to32BitFlat
  30
  31 ALIGN   16
  32
  33         DD      0, 0, 0
  34
  35 ;
  36 ; The VTF signature
  37 ;
  38 ; VTF-0 means that the VTF (Volume Top File) code does not require
  39 ; any fixups.
  40 ;
  41 vtfSignature:
  42         DB      'V', 'T', 'F', 0
  43
  44 ;
  45 ; Reset Vector
  46 ;
  47 ; This is where the processor will begin execution
  48 ;
  49         jmp     short earlyInit_Real16
  50
  51 ALIGN   16
  52
  53 fourGigabytes:
  54