diff options
Diffstat (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm')
| -rw-r--r-- | UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.nasm | 47 |
1 files changed, 21 insertions, 26 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.nasm b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.nasm index fceaaf2689..f7cdcce9a7 100644 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.nasm +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/MpFuncs.nasm @@ -42,49 +42,44 @@ extern ASM_PFX(InitializeFloatingPointUnits) ;-------------------------------------------------------------------------------------
;RendezvousFunnelProc (&WakeUpBuffer,MemAddress);
+BITS 16
global ASM_PFX(RendezvousFunnelProc)
ASM_PFX(RendezvousFunnelProc):
RendezvousFunnelProcStart:
; At this point CS = 0x(vv00) and ip= 0x0.
- db 0x8c, 0xc8 ; mov ax, cs
- db 0x8e, 0xd8 ; mov ds, ax
- db 0x8e, 0xc0 ; mov es, ax
- db 0x8e, 0xd0 ; mov ss, ax
- db 0x33, 0xc0 ; xor ax, ax
- db 0x8e, 0xe0 ; mov fs, ax
- db 0x8e, 0xe8 ; mov gs, ax
+ mov ax, cs
+ mov ds, ax
+ mov es, ax
+ mov ss, ax
+ xor ax, ax
+ mov fs, ax
+ mov gs, ax
flat32Start:
- db 0xBE
- dw BufferStart ; mov si, BufferStart
- db 0x66, 0x8B, 0x14 ; mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
+ mov si, BufferStart
+ mov edx,dword [si] ; EDX is keeping the start address of wakeup buffer
- db 0xBE
- dw GdtrProfile ; mov si, GdtrProfile
- db 0x66 ; db 66h
- db 0x2E, 0xF, 0x1, 0x14 ; lgdt fword ptr cs:[si]
+ mov si, GdtrProfile
+o32 lgdt [cs:si]
- db 0xBE
- dw IdtrProfile ; mov si, IdtrProfile
- db 0x66 ; db 66h
- db 0x2E, 0xF, 0x1, 0x1C ; lidt fword ptr cs:[si]
+ mov si, IdtrProfile
+o32 lidt [cs:si]
- db 0x33, 0xC0 ; xor ax, ax
- db 0x8E, 0xD8 ; mov ds, ax
+ xor ax, ax
+ mov ds, ax
- db 0xF, 0x20, 0xC0 ; mov eax, cr0 ; Get control register 0
- db 0x66, 0x83, 0xC8, 0x1 ; or eax, 000000001h ; Set PE bit (bit #0)
- db 0xF, 0x22, 0xC0 ; mov cr0, eax
+ mov eax, cr0 ; Get control register 0
+ or eax, 0x000000001 ; Set PE bit (bit #0)
+ mov cr0, eax
FLAT32_JUMP:
- db 0x66, 0x67, 0xEA ; far jump
- dd 0x0 ; 32-bit offset
- dw 0x20 ; 16-bit selector
+a32 jmp dword 0x20:0x0
+BITS 32
PMODE_ENTRY: ; protected mode entry point
mov ax, 0x8
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