mirror of https://github.com/acidanthera/audk.git
192 lines
6.6 KiB
NASM
192 lines
6.6 KiB
NASM
;------------------------------------------------------------------------------ ;
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; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
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; This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; Module Name:
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;
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; MpFuncs32.asm
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;
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; Abstract:
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;
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; This is the assembly code for MP support
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;
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;-------------------------------------------------------------------------------
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.686p
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.model flat
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include MpEqu.inc
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InitializeFloatingPointUnits PROTO C
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.code
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;-------------------------------------------------------------------------------------
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;RendezvousFunnelProc procedure follows. All APs execute their procedure. This
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;procedure serializes all the AP processors through an Init sequence. It must be
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;noted that APs arrive here very raw...ie: real mode, no stack.
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;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
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;IS IN MACHINE CODE.
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;-------------------------------------------------------------------------------------
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RendezvousFunnelProc PROC PUBLIC
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RendezvousFunnelProcStart::
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; At this point CS = 0x(vv00) and ip= 0x0.
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; Save BIST information to ebp firstly
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db 66h, 08bh, 0e8h ; mov ebp, eax ; save BIST information
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db 8ch,0c8h ; mov ax,cs
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db 8eh,0d8h ; mov ds,ax
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db 8eh,0c0h ; mov es,ax
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db 8eh,0d0h ; mov ss,ax
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db 33h,0c0h ; xor ax,ax
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db 8eh,0e0h ; mov fs,ax
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db 8eh,0e8h ; mov gs,ax
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db 0BEh ; opcode of mov si, mem16
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dw BufferStartLocation ; mov si, BufferStartLocation
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db 66h, 8Bh, 1Ch ; mov ebx,dword ptr [si]
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db 0BFh ; opcode of mov di, mem16
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dw PmodeOffsetLocation ; mov di, PmodeOffsetLocation
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db 66h, 8Bh, 05h ; mov eax,dword ptr [di]
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db 8Bh, 0F8h ; mov di, ax
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db 83h, 0EFh,06h ; sub di, 06h
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db 66h, 03h, 0C3h ; add eax, ebx
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db 66h, 89h, 05h ; mov dword ptr [di],eax
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db 0BEh ; opcode of mov si, mem16
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dw GdtrLocation ; mov si, GdtrLocation
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db 66h ; db 66h
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db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si]
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db 0BEh
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dw IdtrLocation ; mov si, IdtrLocation
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db 66h ; db 66h
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db 2Eh,0Fh, 01h, 1Ch ; lidt fword ptr cs:[si]
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db 33h, 0C0h ; xor ax, ax
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db 8Eh, 0D8h ; mov ds, ax
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db 0Fh, 20h, 0C0h ; mov eax, cr0 ;Get control register 0
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db 66h, 83h, 0C8h, 03h ; or eax, 000000003h ;Set PE bit (bit #0) & MP
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db 0Fh, 22h, 0C0h ; mov cr0, eax
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db 66h, 67h, 0EAh ; far jump
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dd 0h ; 32-bit offset
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dw PROTECT_MODE_CS ; 16-bit selector
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Flat32Start:: ; protected mode entry point
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mov ax, PROTECT_MODE_DS
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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mov ss, ax
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mov esi, ebx
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mov edi, esi
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add edi, LockLocation
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mov eax, NotVacantFlag
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TestLock:
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xchg dword ptr [edi], eax
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cmp eax, NotVacantFlag
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jz TestLock
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mov edi, esi
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add edi, NumApsExecutingLoction
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inc dword ptr [edi]
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mov ebx, dword ptr [edi]
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ProgramStack:
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mov edi, esi
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add edi, StackSizeLocation
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mov eax, dword ptr [edi]
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mov edi, esi
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add edi, StackStartAddressLocation
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add eax, dword ptr [edi]
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mov esp, eax
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mov dword ptr [edi], eax
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Releaselock:
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mov eax, VacantFlag
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mov edi, esi
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add edi, LockLocation
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xchg dword ptr [edi], eax
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CProcedureInvoke:
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push ebp ; push BIST data at top of AP stack
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xor ebp, ebp ; clear ebp for call stack trace
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push ebp
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mov ebp, esp
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mov eax, InitializeFloatingPointUnits
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call eax ; Call assembly function to initialize FPU per UEFI spec
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push ebx ; Push NumApsExecuting
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mov eax, esi
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add eax, LockLocation
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push eax ; push address of exchange info data buffer
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mov edi, esi
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add edi, ApProcedureLocation
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mov eax, dword ptr [edi]
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call eax ; invoke C function
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jmp $ ; never reach here
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RendezvousFunnelProc ENDP
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RendezvousFunnelProcEnd::
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;-------------------------------------------------------------------------------------
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; AsmGetAddressMap (&AddressMap);
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;-------------------------------------------------------------------------------------
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AsmGetAddressMap PROC near C PUBLIC
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pushad
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mov ebp,esp
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mov ebx, dword ptr [ebp+24h]
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mov dword ptr [ebx], RendezvousFunnelProcStart
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mov dword ptr [ebx + 4h], Flat32Start - RendezvousFunnelProcStart
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mov dword ptr [ebx + 8h], 0
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mov dword ptr [ebx + 0ch], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
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popad
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ret
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AsmGetAddressMap ENDP
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AsmInitializeGdt PROC near C PUBLIC
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push ebp
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mov ebp, esp
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pushad
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mov edi, [ebp + 8] ; Load GDT register
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mov ax,cs ; Get the selector data from our code image
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mov es,ax
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lgdt FWORD PTR es:[edi] ; and update the GDTR
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push PROTECT_MODE_CS
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lea eax, SetCodeSelectorFarJump
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push eax
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retf
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SetCodeSelectorFarJump:
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mov ax, PROTECT_MODE_DS ; Update the Base for the new selectors, too
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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mov ss, ax
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popad
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pop ebp
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ret
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AsmInitializeGdt ENDP
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END
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