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;; @file
; This is the assembly code for Multi-processor S3 support
;
; 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.
;
;;
EXTERN InitializeFloatingPointUnits:PROC
VacantFlag Equ 00h
NotVacantFlag Equ 0ffh
LockLocation equ RendezvousFunnelProcEnd - RendezvousFunnelProcStart
StackStartAddressLocation equ LockLocation + 08h
StackSizeLocation equ LockLocation + 10h
CProcedureLocation equ LockLocation + 18h
GdtrLocation equ LockLocation + 20h
IdtrLocation equ LockLocation + 2Ah
BufferStartLocation equ LockLocation + 34h
Cr3OffsetLocation equ LockLocation + 38h
;-------------------------------------------------------------------------------------
;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);
;text SEGMENT
.code
RendezvousFunnelProc PROC
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 BufferStartLocation ; mov si, BufferStartLocation
db 66h, 8Bh, 14h ; mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
db 0BEh
dw Cr3OffsetLocation ; mov si, Cr3Location
db 66h, 8Bh, 0Ch ; mov ecx,dword ptr [si] ; ECX is keeping the value of CR3
db 0BEh
dw GdtrLocation ; mov si, GdtrProfile
db 66h ; db 66h
db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si]
db 0BEh
dw IdtrLocation ; 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
NemInit:: ; protected mode entry point
db 66h, 0B8h, 18h, 00h ; mov ax, 18h
db 66h, 8Eh, 0D8h ; mov ds, ax
db 66h, 8Eh, 0C0h ; mov es, ax
db 66h, 8Eh, 0E0h ; mov fs, ax
db 66h, 8Eh, 0E8h ; mov gs, ax
db 66h, 8Eh, 0D0h ; mov ss, ax ; Flat mode setup.
db 0Fh, 20h, 0E0h ; mov eax, cr4
db 0Fh, 0BAh, 0E8h, 05h ; bts eax, 5
db 0Fh, 22h, 0E0h ; mov cr4, eax
db 0Fh, 22h, 0D9h ; mov cr3, ecx
db 8Bh, 0F2h ; mov esi, edx ; Save wakeup buffer address
db 0B9h
dd 0C0000080h ; mov ecx, 0c0000080h ; EFER MSR number.
db 0Fh, 32h ; rdmsr ; Read EFER.
db 0Fh, 0BAh, 0E8h, 08h ; bts eax, 8 ; Set LME=1.
db 0Fh, 30h ; wrmsr ; Write EFER.
db 0Fh, 20h, 0C0h ; mov eax, cr0 ; Read CR0.
db 0Fh, 0BAh, 0E8h, 1Fh ; bts eax, 31 ; Set PG=1.
db 0Fh, 22h, 0C0h ; mov cr0, eax ; Write CR0.
LONG_JUMP::
db 67h, 0EAh ; far jump
dd 0h ; 32-bit offset
dw 38h ; 16-bit selector
LongModeStart::
mov ax, 30h
mov ds, ax
mov es, ax
mov ss, ax
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, StackSizeLocation
mov rax, qword ptr [edi]
mov edi, esi
add edi, StackStartAddressLocation
add rax, qword ptr [edi]
mov rsp, rax
mov qword ptr [edi], rax
Releaselock::
mov al, VacantFlag
mov edi, esi
add edi, LockLocation
xchg byte ptr [edi], al
;
; Call assembly function to initialize FPU.
;
mov rax, InitializeFloatingPointUnits
sub rsp, 20h
call rax
add rsp, 20h
;
; Call C Function
;
mov edi, esi
add edi, CProcedureLocation
mov rax, qword ptr [edi]
test rax, rax
jz GoToSleep
sub rsp, 20h
call rax
add rsp, 20h
GoToSleep::
cli
hlt
jmp $-2
RendezvousFunnelProcEnd::
RendezvousFunnelProc ENDP
;-------------------------------------------------------------------------------------
; AsmGetAddressMap (&AddressMap);
;-------------------------------------------------------------------------------------
; comments here for definition of address map
AsmGetAddressMap PROC
mov rax, offset RendezvousFunnelProcStart
mov qword ptr [rcx], rax
mov qword ptr [rcx+8h], NemInit - RendezvousFunnelProcStart
mov qword ptr [rcx+10h], FLAT32_JUMP - RendezvousFunnelProcStart
mov qword ptr [rcx+18h], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
mov qword ptr [rcx+20h], LongModeStart - RendezvousFunnelProcStart
mov qword ptr [rcx+28h], LONG_JUMP - RendezvousFunnelProcStart
ret
AsmGetAddressMap ENDP
END
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