8265373e60
we need to locate the FSP Info Header by calculating offset dynamically to handle the scenario of FSP component is being rebased to different location. Cc: Maurice Ma <maurice.ma@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Satya Yarlagadda <satya.p.yarlagadda@intel.com> Reviewed-by: Maurice Ma <maurice.ma@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>
35 lines
1.2 KiB
NASM
35 lines
1.2 KiB
NASM
;; @file
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; Provide FSP helper function.
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;
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; Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
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; This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;;
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SECTION .text
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global ASM_PFX(FspInfoHeaderRelativeOff)
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global ASM_PFX(AsmGetFspBaseAddress)
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ASM_PFX(AsmGetFspBaseAddress):
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call ASM_PFX(AsmGetFspInfoHeader)
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add eax, 0x1C
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mov eax, dword [eax]
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ret
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global ASM_PFX(AsmGetFspInfoHeader)
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ASM_PFX(AsmGetFspInfoHeader):
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call ASM_PFX(NextInstruction)
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ASM_PFX(NextInstruction):
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pop eax
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sub eax, ASM_PFX(NextInstruction)
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add eax, ASM_PFX(AsmGetFspInfoHeader)
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DB 02Dh ; opcode of sub eax, imm32
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ASM_PFX(FspInfoHeaderRelativeOff): DD 0x12345678 ; sub eax, FspInfoHeaderRelativeOff
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ret
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