diff options
Diffstat (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm')
-rw-r--r-- | UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm deleted file mode 100644 index b5e77a1..0000000 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/SmmInit.nasm +++ /dev/null @@ -1,96 +0,0 @@ -;------------------------------------------------------------------------------ ;
-; Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>
-; SPDX-License-Identifier: BSD-2-Clause-Patent
-;
-; Module Name:
-;
-; SmmInit.nasm
-;
-; Abstract:
-;
-; Functions for relocating SMBASE's for all processors
-;
-;-------------------------------------------------------------------------------
-
-%include "StuffRsbNasm.inc"
-
-extern ASM_PFX(SmmInitHandler)
-extern ASM_PFX(mRebasedFlag)
-extern ASM_PFX(mSmmRelocationOriginalAddress)
-
-global ASM_PFX(gPatchSmmCr3)
-global ASM_PFX(gPatchSmmCr4)
-global ASM_PFX(gPatchSmmCr0)
-global ASM_PFX(gPatchSmmInitStack)
-global ASM_PFX(gcSmiInitGdtr)
-global ASM_PFX(gcSmmInitSize)
-global ASM_PFX(gcSmmInitTemplate)
-
-%define PROTECT_MODE_CS 0x8
-%define PROTECT_MODE_DS 0x20
-
- SECTION .text
-
-ASM_PFX(gcSmiInitGdtr):
- DW 0
- DQ 0
-
-global ASM_PFX(SmmStartup)
-
-BITS 16
-ASM_PFX(SmmStartup):
- mov eax, 0x80000001 ; read capability
- cpuid
- mov ebx, edx ; rdmsr will change edx. keep it in ebx.
- and ebx, BIT20 ; extract NX capability bit
- shr ebx, 9 ; shift bit to IA32_EFER.NXE[BIT11] position
- mov eax, strict dword 0 ; source operand will be patched
-ASM_PFX(gPatchSmmCr3):
- mov cr3, eax
-o32 lgdt [cs:ebp + (ASM_PFX(gcSmiInitGdtr) - ASM_PFX(SmmStartup))]
- mov eax, strict dword 0 ; source operand will be patched
-ASM_PFX(gPatchSmmCr4):
- mov cr4, eax
- mov ecx, 0xc0000080 ; IA32_EFER MSR
- rdmsr
- or eax, ebx ; set NXE bit if NX is available
- wrmsr
- mov eax, strict dword 0 ; source operand will be patched
-ASM_PFX(gPatchSmmCr0):
- mov di, PROTECT_MODE_DS
- mov cr0, eax
- jmp PROTECT_MODE_CS : dword @32bit
-
-BITS 32
-@32bit:
- mov ds, edi
- mov es, edi
- mov fs, edi
- mov gs, edi
- mov ss, edi
- mov esp, strict dword 0 ; source operand will be patched
-ASM_PFX(gPatchSmmInitStack):
- call ASM_PFX(SmmInitHandler)
- StuffRsb32
- rsm
-
-BITS 16
-ASM_PFX(gcSmmInitTemplate):
- mov ebp, ASM_PFX(SmmStartup)
- sub ebp, 0x30000
- jmp ebp
-
-ASM_PFX(gcSmmInitSize): DW $ - ASM_PFX(gcSmmInitTemplate)
-
-BITS 32
-global ASM_PFX(SmmRelocationSemaphoreComplete)
-ASM_PFX(SmmRelocationSemaphoreComplete):
- push eax
- mov eax, [ASM_PFX(mRebasedFlag)]
- mov byte [eax], 1
- pop eax
- jmp [ASM_PFX(mSmmRelocationOriginalAddress)]
-
-global ASM_PFX(PiSmmCpuSmmInitFixupAddress)
-ASM_PFX(PiSmmCpuSmmInitFixupAddress):
- ret
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