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|
;------------------------------------------------------------------------------
; IA32 assembly file for AP startup vector.
;
; Copyright (c) 2009 - 2010, 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.
;
;------------------------------------------------------------------------------
.686p
.model flat
.code
include AsmInclude.inc
;-------------------------------------------------------------------------------------
FJMP32 MACRO Selector, Offset
DB 066h
DB 067h
DB 0EAh ; far jump
DD Offset ; 32-bit offset
DW Selector ; 16-bit selector
ENDM
;-------------------------------------------------------------------------------------
;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
; Switch to flat mode.
db 0BEh
dw BufferStart ; mov si, BufferStart
db 66h, 8Bh, 0Ch ; mov ecx,dword ptr [si] ; ECX is keeping the start address of wakeup buffer
db 0FAh ; cli
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::
FJMP32 010h,0h ; Far jmp using code segment descriptor
ProtectedModeStart:: ; 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.
;
; ProgramStack
;
mov ecx, 1bh ; Read IA32_APIC_BASE MSR
rdmsr
bt eax, 10 ; Check for x2apic mode
jnc LegacyApicMode
mov ecx, 802h ; Read APIC_ID
rdmsr
mov ebx, eax ; ebx == apicid
jmp GetCpuNumber
LegacyApicMode::
and eax, 0fffff000h
add eax, 20h
mov ebx, dword ptr [eax]
shr ebx, 24 ; ebx == apicid
GetCpuNumber::
xor ecx, ecx
mov edi, esi
add edi, ProcessorNumber
mov ecx, dword ptr [edi + 4 * ebx] ; ECX = CpuNumber
mov edi, esi
add edi, StackSize
mov eax, dword ptr [edi]
inc ecx
mul ecx ; EAX = StackSize * (CpuNumber + 1)
mov edi, esi
add edi, StackStart
mov ebx, dword ptr [edi]
add eax, ebx ; EAX = StackStart + StackSize * (CpuNumber + 1)
mov esp, eax
;
; Call C Function
;
mov edi, esi
add edi, RendezvousProc
mov ebx, dword ptr [edi]
test ebx, ebx
jz GoToSleep
call ebx ; 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], ProtectedModeStart - RendezvousFunnelProcStart
mov dword ptr [ebx+8h], FLAT32_JUMP - RendezvousFunnelProcStart
mov dword ptr [ebx+0ch], 0
mov dword ptr [ebx+10h], 0
mov dword ptr [ebx+14h], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
popad
ret
AsmGetAddressMap ENDP
END
|
