UefiCpuPkg/ResetVector/Vtf0/Ia16/Init16.asm

   1 ;------------------------------------------------------------------------------
   2 ; @file
   3 ; 16-bit initialization code
   4 ;
   5 ; Copyright (c) 2008 - 2009, Intel Corporation. All rights reserved.<BR>
   6 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   7 ;
   8 ;------------------------------------------------------------------------------
   9
  10
  11 BITS    16
  12
  13 ;
  14 ; @param[out] DI    'BP' to indicate boot-strap processor
  15 ;
  16 EarlyBspInitReal16:
  17     mov     di, 'BP'
  18     jmp     short Main16
  19
  20 ;
  21 ; @param[out] DI    'AP' to indicate application processor
  22 ;
  23 EarlyApInitReal16:
  24     mov     di, 'AP'
  25     jmp     short Main16
  26
  27 ;
  28 ; Modified:  EAX
  29 ;
  30 ; @param[in]  EAX   Initial value of the EAX register (BIST: Built-in Self Test)
  31 ; @param[out] ESP   Initial value of the EAX register (BIST: Built-in Self Test)
  32 ;
  33 EarlyInit16:
  34     ;
  35     ; ESP -  Initial value of the EAX register (BIST: Built-in Self Test)
  36     ;
  37     mov     esp, eax
  38
  39     debugInitialize
  40
  41     OneTimeCallRet EarlyInit16
  42