IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm

   1 ;; @file
   2 ;  Provide FSP helper function.
   3 ;
   4 ; Copyright (c) 2015 - 2016, 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     SECTION .text
  15
  16 global ASM_PFX(FspInfoHeaderRelativeOff)
  17 ASM_PFX(FspInfoHeaderRelativeOff):
  18    DD    0x12345678               ; This value must be patched by the build script
  19
  20 global ASM_PFX(AsmGetFspBaseAddress)
  21 ASM_PFX(AsmGetFspBaseAddress):
  22    call  ASM_PFX(AsmGetFspInfoHeader)
  23    add   eax, 0x1C
  24    mov   eax, dword [eax]
  25    ret
  26
  27 global ASM_PFX(AsmGetFspInfoHeader)
  28 ASM_PFX(AsmGetFspInfoHeader):
  29    call  ASM_PFX(NextInstruction)
  30 ASM_PFX(NextInstruction):
  31    pop   eax
  32    sub   eax, ASM_PFX(NextInstruction)
  33    add   eax, ASM_PFX(AsmGetFspInfoHeader)
  34    sub   eax, dword [ASM_PFX(FspInfoHeaderRelativeOff)]
  35    ret
  36
  37 global ASM_PFX(AsmGetFspInfoHeaderNoStack)
  38 ASM_PFX(AsmGetFspInfoHeaderNoStack):
  39    mov   eax, ASM_PFX(AsmGetFspInfoHeader)
  40    sub   eax, dword [ASM_PFX(FspInfoHeaderRelativeOff)]
  41    jmp   edi