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|
;------------------------------------------------------------------------------ ;
; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution. The full text of the license may be found at
; http://opensource.org/licenses/bsd-license.php.
;
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;
; Module Name:
;
; MpFuncs.asm
;
; Abstract:
;
; This is the assembly code for Multi-processor S3 support
;
;-------------------------------------------------------------------------------
.686p
.model flat,C
.code
EXTERN InitializeFloatingPointUnits:PROC
VacantFlag Equ 00h
NotVacantFlag Equ 0ffh
LockLocation equ RendezvousFunnelProcEnd - RendezvousFunnelProcStart
StackStart equ LockLocation + 4h
StackSize equ LockLocation + 8h
RendezvousProc equ LockLocation + 0Ch
GdtrProfile equ LockLocation + 10h
IdtrProfile equ LockLocation + 16h
BufferStart equ LockLocation + 1Ch
;-------------------------------------------------------------------------------------
;RendezvousFunnelProc procedure follows. All APs execute their procedure. This
;procedure serializes all the AP processors through an Init sequence. It must be
;noted that APs arrive here very raw...ie: real mode, no stack.
;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
;IS IN MACHINE CODE.
;-------------------------------------------------------------------------------------
;RendezvousFunnelProc (&WakeUpBuffer,MemAddress);
RendezvousFunnelProc PROC near C PUBLIC
RendezvousFunnelProcStart::
; At this point CS = 0x(vv00) and ip= 0x0.
db 8ch, 0c8h ; mov ax, cs
db 8eh, 0d8h ; mov ds, ax
db 8eh, 0c0h ; mov es, ax
db 8eh, 0d0h ; mov ss, ax
db 33h, 0c0h ; xor ax, ax
db 8eh, 0e0h ; mov fs, ax
db 8eh, 0e8h ; mov gs, ax
flat32Start::
db 0BEh
dw BufferStart ; mov si, BufferStart
db 66h, 8Bh, 14h ; mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
db 0BEh
dw GdtrProfile ; mov si, GdtrProfile
db 66h ; db 66h
db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si]
db 0BEh
dw IdtrProfile ; mov si, IdtrProfile
db 66h ; db 66h
db 2Eh, 0Fh, 01h, 1Ch ; lidt fword ptr cs:[si]
db 33h, 0C0h ; xor ax, ax
db 8Eh, 0D8h ; mov ds, ax
db 0Fh, 20h, 0C0h ; mov eax, cr0 ; Get control register 0
db 66h, 83h, 0C8h, 01h ; or eax, 000000001h ; Set PE bit (bit #0)
db 0Fh, 22h, 0C0h ; mov cr0, eax
FLAT32_JUMP::
db 66h, 67h, 0EAh ; far jump
dd 0h ; 32-bit offset
dw 20h ; 16-bit selector
PMODE_ENTRY:: ; protected mode entry point
mov ax, 8h
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax ; Flat mode setup.
mov esi, edx
mov edi, esi
add edi, LockLocation
mov al, NotVacantFlag
TestLock::
xchg byte ptr [edi], al
cmp al, NotVacantFlag
jz TestLock
ProgramStack::
mov edi, esi
add edi, StackSize
mov eax, dword ptr [edi]
mov edi, esi
add edi, StackStart
add eax, dword ptr [edi]
mov esp, eax
mov dword ptr [edi], eax
Releaselock::
mov al, VacantFlag
mov edi, esi
add edi, LockLocation
xchg byte ptr [edi], al
;
; Call assembly function to initialize FPU.
;
mov ebx, InitializeFloatingPointUnits
call ebx
;
; Call C Function
;
mov edi, esi
add edi, RendezvousProc
mov eax, dword ptr [edi]
test eax, eax
jz GoToSleep
call eax ; Call C function
GoToSleep::
cli
hlt
jmp $-2
RendezvousFunnelProc ENDP
RendezvousFunnelProcEnd::
;-------------------------------------------------------------------------------------
; AsmGetAddressMap (&AddressMap);
;-------------------------------------------------------------------------------------
AsmGetAddressMap PROC near C PUBLIC
pushad
mov ebp,esp
mov ebx, dword ptr [ebp+24h]
mov dword ptr [ebx], RendezvousFunnelProcStart
mov dword ptr [ebx+4h], PMODE_ENTRY - RendezvousFunnelProcStart
mov dword ptr [ebx+8h], FLAT32_JUMP - RendezvousFunnelProcStart
mov dword ptr [ebx+0ch], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
popad
ret
AsmGetAddressMap ENDP
END
|
