UefiCpuPkg/ResetVector/Vtf0/Ia16/Init16.asm

   1 ;------------------------------------------------------------------------------
   2 ; @file
   3 ; 16-bit initialization code
   4 ;
   5 ; Copyright (c) 2008 - 2009, Intel Corporation
   6 ; All rights reserved. This program and the accompanying materials
   7 ; are licensed and made available under the terms and conditions of the BSD License
   8 ; which accompanies this distribution.  The full text of the license may be found at
   9 ; http://opensource.org/licenses/bsd-license.php
  10 ;
  11 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 ;
  14 ;------------------------------------------------------------------------------
  15
  16
  17 BITS    16
  18
  19 ;
  20 ; @param[out] DI    'BP' to indicate boot-strap processor
  21 ;
  22 EarlyBspInitReal16:
  23     mov     di, 'BP'
  24     jmp     short Main16
  25
  26 ;
  27 ; @param[out] DI    'AP' to indicate application processor
  28 ;
  29 EarlyApInitReal16:
  30     mov     di, 'AP'
  31     jmp     short Main16
  32
  33 ;
  34 ; Modified:  EAX
  35 ;
  36 ; @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)
  37 ; @param[out] ESP   Initial value of the EAX register (BIST: Built-in Self Test)
  38 ;
  39 EarlyInit16:
  40     ;
  41     ; ESP -  Initial value of the EAX register (BIST: Built-in Self Test)
  42     ;
  43     mov     esp, eax
  44
  45     debugInitialize
  46
  47     OneTimeCallRet EarlyInit16
  48