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;; @file
; Functions for relocating SMBASE's for all processors
;
; Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
;
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution. The full text of the license may be found at
; http://opensource.org/licenses/bsd-license.php.
;
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;
;;
.686p
.xmm
.model flat,C
SmmInitHandler PROTO C
EXTERNDEF C gSmmCr0:DWORD
EXTERNDEF C gSmmCr3:DWORD
EXTERNDEF C gSmmCr4:DWORD
EXTERNDEF C gcSmmInitTemplate:BYTE
EXTERNDEF C gcSmmInitSize:WORD
EXTERNDEF C gSmmJmpAddr:QWORD
EXTERNDEF C mRebasedFlag:PTR BYTE
EXTERNDEF C mSmmRelocationOriginalAddress:DWORD
EXTERNDEF C gSmmInitStack:DWORD
.data
NullSeg DQ 0 ; reserved by architecture
DataSeg32 LABEL QWORD
DW -1 ; LimitLow
DW 0 ; BaseLow
DB 0 ; BaseMid
DB 93h
DB 0cfh ; LimitHigh
DB 0 ; BaseHigh
CodeSeg32 LABEL QWORD
DW -1 ; LimitLow
DW 0 ; BaseLow
DB 0 ; BaseMid
DB 9bh
DB 0cfh ; LimitHigh
DB 0 ; BaseHigh
GDT_SIZE = $ - offset NullSeg
.code
GdtDesc LABEL FWORD
DW GDT_SIZE
DD offset NullSeg
SmmStartup PROC
DB 66h, 0b8h
gSmmCr3 DD ?
mov cr3, eax
DB 67h, 66h
lgdt fword ptr cs:[ebp + (offset GdtDesc - SmmStartup)]
DB 66h, 0b8h
gSmmCr4 DD ?
mov cr4, eax
DB 66h, 0b8h
gSmmCr0 DD ?
DB 0bfh, 8, 0 ; mov di, 8
mov cr0, eax
DB 66h, 0eah ; jmp far [ptr48]
gSmmJmpAddr LABEL QWORD
DD @32bit
DW 10h
@32bit:
mov ds, edi
mov es, edi
mov fs, edi
mov gs, edi
mov ss, edi
DB 0bch ; mov esp, imm32
gSmmInitStack DD ?
call SmmInitHandler
rsm
SmmStartup ENDP
gcSmmInitTemplate LABEL BYTE
_SmmInitTemplate PROC
DB 66h
mov ebp, SmmStartup
DB 66h, 81h, 0edh, 00h, 00h, 03h, 00 ; sub ebp, 30000h
jmp bp ; jmp ebp actually
_SmmInitTemplate ENDP
gcSmmInitSize DW $ - gcSmmInitTemplate
SmmRelocationSemaphoreComplete PROC
push eax
mov eax, mRebasedFlag
mov byte ptr [eax], 1
pop eax
jmp [mSmmRelocationOriginalAddress]
SmmRelocationSemaphoreComplete ENDP
END
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