IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm

;; @file
;  Provide FSP helper function.
;
; Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;;

    SECTION .text

FSP_HEADER_IMGBASE_OFFSET    EQU   1Ch

global ASM_PFX(FspInfoHeaderRelativeOff)
ASM_PFX(FspInfoHeaderRelativeOff):
   DD    0x12345678               ; This value must be patched by the build script

global ASM_PFX(AsmGetFspBaseAddress)
ASM_PFX(AsmGetFspBaseAddress):
   call  ASM_PFX(AsmGetFspInfoHeader)
   add   eax, FSP_HEADER_IMGBASE_OFFSET
   mov   eax, dword [eax]
   ret

global ASM_PFX(AsmGetFspInfoHeader)
ASM_PFX(AsmGetFspInfoHeader):
   call  ASM_PFX(NextInstruction)
ASM_PFX(NextInstruction):
   pop   eax
   sub   eax, ASM_PFX(NextInstruction)
   add   eax, ASM_PFX(AsmGetFspInfoHeader)
   sub   eax, dword [eax - ASM_PFX(AsmGetFspInfoHeader) + ASM_PFX(FspInfoHeaderRelativeOff)]
   ret

global ASM_PFX(AsmGetFspInfoHeaderNoStack)
ASM_PFX(AsmGetFspInfoHeaderNoStack):
   mov   eax, ASM_PFX(AsmGetFspInfoHeader)
   sub   eax, dword [ASM_PFX(FspInfoHeaderRelativeOff)]
   jmp   edi