1 ;------------------------------------------------------------------------------ ;
2 ; Copyright (c) 2016 - 2018, 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 extern ASM_PFX(SmmInitHandler)
22 extern ASM_PFX(mRebasedFlag)
23 extern ASM_PFX(mSmmRelocationOriginalAddress)
25 global ASM_PFX(gSmmCr3)
26 global ASM_PFX(gSmmCr4)
27 global ASM_PFX(gSmmCr0)
28 global ASM_PFX(gSmmJmpAddr)
29 global ASM_PFX(gSmmInitStack)
30 global ASM_PFX(gcSmiInitGdtr)
31 global ASM_PFX(gcSmmInitSize)
32 global ASM_PFX(gcSmmInitTemplate)
34 %define PROTECT_MODE_CS 0x8
35 %define PROTECT_MODE_DS 0x20
39 ASM_PFX(gcSmiInitGdtr):
43 global ASM_PFX(SmmStartup)
46 mov eax, 0x80000001 ; read capability
49 mov ebx, edx ; rdmsr will change edx. keep it in ebx.
51 ASM_PFX(gSmmCr3): DD 0
54 lgdt [cs:ebp + (ASM_PFX(gcSmiInitGdtr) - ASM_PFX(SmmStartup))]
56 ASM_PFX(gSmmCr4): DD 0
59 mov ecx, 0xc0000080 ; IA32_EFER MSR
62 test ebx, BIT20 ; check NXE capability
64 or ah, BIT3 ; set NXE bit
68 ASM_PFX(gSmmCr0): DD 0
69 DB 0xbf, PROTECT_MODE_DS, 0 ; mov di, PROTECT_MODE_DS
71 DB 0x66, 0xea ; jmp far [ptr48]
81 DB 0xbc ; mov esp, imm32
82 ASM_PFX(gSmmInitStack): DD 0
83 call ASM_PFX(SmmInitHandler)
87 ASM_PFX(gcSmmInitTemplate):
88 mov ebp, ASM_PFX(SmmStartup)
92 ASM_PFX(gcSmmInitSize): DW $ - ASM_PFX(gcSmmInitTemplate)
95 global ASM_PFX(SmmRelocationSemaphoreComplete)
96 ASM_PFX(SmmRelocationSemaphoreComplete):
98 mov eax, [ASM_PFX(mRebasedFlag)]
101 jmp [ASM_PFX(mSmmRelocationOriginalAddress)]
103 global ASM_PFX(PiSmmCpuSmmInitFixupAddress)
104 ASM_PFX(PiSmmCpuSmmInitFixupAddress):