1 ;------------------------------------------------------------------------------ ;
2 ; Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
3 ; This program and the accompanying materials
4 ; are licensed and made available under the terms and conditions of the BSD License
5 ; which accompanies this distribution. The full text of the license may be found at
6 ; http://opensource.org/licenses/bsd-license.php.
8 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
9 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
17 ; Functions for relocating SMBASE's for all processors
19 ;-------------------------------------------------------------------------------
21 EXTERNDEF SmmInitHandler:PROC
22 EXTERNDEF gSmmCr0:DWORD
23 EXTERNDEF gSmmCr3:DWORD
24 EXTERNDEF gSmmCr4:DWORD
25 EXTERNDEF gSmmJmpAddr:QWORD
26 EXTERNDEF gcSmmInitTemplate:BYTE
27 EXTERNDEF gcSmmInitSize:WORD
28 EXTERNDEF mRebasedFlag:PTR BYTE
29 EXTERNDEF mSmmRelocationOriginalAddress:QWORD
30 EXTERNDEF mRebasedFlagAddr32:DWORD
31 EXTERNDEF mSmmRelocationOriginalAddressPtr32:DWORD
32 EXTERNDEF gSmmInitStack:QWORD
33 EXTERNDEF gcSmiInitGdtr:FWORD
37 gcSmiInitGdtr LABEL FWORD
42 DB 66h, 0b8h ; mov eax, imm32
46 lgdt fword ptr [ebp + (offset gcSmiInitGdtr - SmmStartup)]
47 DB 66h, 0b8h ; mov eax, imm32
49 or ah, 2 ; enable XMM registers access
52 mov ecx, 0c0000080h ; IA32_EFER MSR
54 or ah, 1 ; set LME bit
56 DB 66h, 0b8h ; mov eax, imm32
58 mov cr0, rax ; enable protected mode & paging
59 DB 66h, 0eah ; far jmp to long mode
60 gSmmJmpAddr DQ @LongMode
61 @LongMode: ; long-mode starts here
62 DB 48h, 0bch ; mov rsp, imm64
64 and sp, 0fff0h ; make sure RSP is 16-byte aligned
66 ; Accoring to X64 calling convention, XMM0~5 are volatile, we need to save
67 ; them before calling C-function.
71 movdqa [rsp + 10h], xmm1
72 movdqa [rsp + 20h], xmm2
73 movdqa [rsp + 30h], xmm3
74 movdqa [rsp + 40h], xmm4
75 movdqa [rsp + 50h], xmm5
82 ; Restore XMM0~5 after calling C-function.
85 movdqa xmm1, [rsp + 10h]
86 movdqa xmm2, [rsp + 20h]
87 movdqa xmm3, [rsp + 30h]
88 movdqa xmm4, [rsp + 40h]
89 movdqa xmm5, [rsp + 50h]
94 gcSmmInitTemplate LABEL BYTE
97 DB 66h, 2eh, 8bh, 2eh ; mov ebp, cs:[@F]
98 DW @L1 - _SmmInitTemplate + 8000h
99 DB 66h, 81h, 0edh, 00h, 00h, 03h, 00 ; sub ebp, 30000h
100 jmp bp ; jmp ebp actually
103 _SmmInitTemplate ENDP
105 gcSmmInitSize DW $ - gcSmmInitTemplate
107 SmmRelocationSemaphoreComplete PROC
109 mov rax, mRebasedFlag
110 mov byte ptr [rax], 1
112 jmp [mSmmRelocationOriginalAddress]
113 SmmRelocationSemaphoreComplete ENDP
116 ; Semaphore code running in 32-bit mode
118 SmmRelocationSemaphoreComplete32 PROC
123 mRebasedFlagAddr32 dd 0
129 mSmmRelocationOriginalAddressPtr32 dd 0
130 SmmRelocationSemaphoreComplete32 ENDP