IntelFsp2Pkg/Library/SecFspSecPlatformLibNull/Ia32/SecCarInit.nasm

   1 ;; @file
   2 ;  SEC CAR function
   3 ;
   4 ; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
   5 ; This program and the accompanying materials
   6 ; are licensed and made available under the terms and conditions of the BSD License
   7 ; which accompanies this distribution.  The full text of the license may be found at
   8 ; http://opensource.org/licenses/bsd-license.php.
   9 ;
  10 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 ;;
  13
  14 ;
  15 ; Define assembler characteristics
  16 ;
  17
  18 %macro RET_ESI 0
  19
  20   movd    esi, mm7                      ; move ReturnAddress from MM7 to ESI
  21   jmp     esi
  22
  23 %endmacro
  24
  25 SECTION .text
  26
  27 ;-----------------------------------------------------------------------------
  28 ;
  29 ;  Section:     SecCarInit
  30 ;
  31 ;  Description: This function initializes the Cache for Data, Stack, and Code
  32 ;
  33 ;-----------------------------------------------------------------------------
  34 global ASM_PFX(SecCarInit)
  35 ASM_PFX(SecCarInit):
  36
  37   ;
  38   ; Set up CAR
  39   ;
  40
  41   xor    eax, eax
  42
  43 SecCarInitExit:
  44
  45   RET_ESI
  46