UefiCpuPkg/ResetVector/Vtf0/Ia16/ResetVectorVtf0.asm

   1 ;------------------------------------------------------------------------------
   2 ; @file
   3 ; First code executed by processor after resetting.
   4 ;
   5 ; Copyright (c) 2008 - 2011, Intel Corporation. All rights reserved.<BR>
   6 ; 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 BITS    16
  17
  18 ALIGN   16
  19
  20 applicationProcessorEntryPoint:
  21 ;
  22 ; Application Processors entry point
  23 ;
  24 ; GenFv generates code aligned on a 4k boundary which will jump to this
  25 ; location.  (0xffffffe0)  This allows the Local APIC Startup IPI to be
  26 ; used to wake up the application processors.
  27 ;
  28     jmp     short EarlyApInitReal16
  29
  30 ALIGN   8
  31
  32     DD      0
  33
  34 ;
  35 ; The VTF signature
  36 ;
  37 ; VTF-0 means that the VTF (Volume Top File) code does not require
  38 ; any fixups.
  39 ;
  40 vtfSignature:
  41     DB      'V', 'T', 'F', 0
  42
  43 ALIGN   16
  44
  45 resetVector:
  46 ;
  47 ; Reset Vector
  48 ;
  49 ; This is where the processor will begin execution
  50 ;
  51     nop
  52     nop
  53     jmp     short EarlyBspInitReal16
  54
  55 ALIGN   16
  56
  57 fourGigabytes:
  58