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Updated FspApiEntry.asm/.s to auto detect the size of the MCU region.

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Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: "Yao, Jiewen" <jiewen.yao@intel.com>
Reviewed-by: "Rangarajan, Ravi P" <ravi.p.rangarajan@intel.com>
Reviewed-by: "Ma, Maurice" <maurice.ma@intel.com>
Reviewed-by: "Mudusuru, Giri P" <giri.p.mudusuru@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16478 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Yao, Jiewen
2014-12-06 00:29:04 +00:00
committed by jyao1
parent 54190e8366
commit 975f1c6417
2 changed files with 444 additions and 318 deletions
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11
IntelFspPkg/FspSecCore/Ia32/FspApiEntry.asm
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@@ -214,16 +214,21 @@ advance_fixed_size:
check_address:
; Is valid Microcode start point ?
cmp dword ptr [esi], 0ffffffffh
cmp dword ptr [esi].ucode_hdr.version, 0ffffffffh
jz done
; Is automatic size detection ?
mov eax, [esp].LOAD_UCODE_PARAMS.ucode_code_size
cmp eax, 0ffffffffh
jz @f
; Address >= microcode region address + microcode region size?
mov eax, [esp].LOAD_UCODE_PARAMS.ucode_code_addr
add eax, [esp].LOAD_UCODE_PARAMS.ucode_code_size
add eax, [esp].LOAD_UCODE_PARAMS.ucode_code_addr
cmp esi, eax
jae done ;Jif address is outside of ucode region
jmp check_main_header
@@:
load_check:
; Get the revision of the current microcode update loaded
mov ecx, MSR_IA32_BIOS_SIGN_ID