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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
#
##
.equ VacantFlag, 0x0
.equ NotVacantFlag, 0xff
.equ LockLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart
.equ StackStartAddressLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x08
.equ StackSizeLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x10
.equ CProcedureLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x18
.equ GdtrLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x20
.equ IdtrLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x2A
.equ BufferStartLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x34
.equ Cr3OffsetLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x38
#-------------------------------------------------------------------------------------
#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);
.code:
ASM_GLOBAL ASM_PFX(RendezvousFunnelProc)
ASM_PFX(RendezvousFunnelProc):
RendezvousFunnelProcStart:
# At this point CS = 0x(vv00) and ip= 0x0.
.byte 0x8c,0xc8 # mov ax, cs
.byte 0x8e,0xd8 # mov ds, ax
.byte 0x8e,0xc0 # mov es, ax
.byte 0x8e,0xd0 # mov ss, ax
.byte 0x33,0xc0 # xor ax, ax
.byte 0x8e,0xe0 # mov fs, ax
.byte 0x8e,0xe8 # mov gs, ax
flat32Start:
.byte 0xBE
.word BufferStartLocation
.byte 0x66,0x8B,0x14 # mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
.byte 0xBE
.word Cr3OffsetLocation
.byte 0x66,0x8B,0xC # mov ecx,dword ptr [si] ; ECX is keeping the value of CR3
.byte 0xBE
.word GdtrLocation
.byte 0x66 # db 66h
.byte 0x2E,0xF,0x1,0x14 # lgdt fword ptr cs:[si]
.byte 0xBE
.word IdtrLocation
.byte 0x66 # db 66h
.byte 0x2E,0xF,0x1,0x1C # lidt fword ptr cs:[si]
.byte 0x33,0xC0 # xor ax, ax
.byte 0x8E,0xD8 # mov ds, ax
.byte 0xF,0x20,0xC0 # mov eax, cr0 ; Get control register 0
.byte 0x66,0x83,0xC8,0x1 # or eax, 000000001h ; Set PE bit (bit #0)
.byte 0xF,0x22,0xC0 # mov cr0, eax
FLAT32_JUMP:
.byte 0x66,0x67,0xEA # far jump
.long 0x0 # 32-bit offset
.word 0x20 # 16-bit selector
NemInit: # protected mode entry point
.byte 0x66,0xB8,0x18,0x0 # mov ax, 18h
.byte 0x66,0x8E,0xD8 # mov ds, ax
.byte 0x66,0x8E,0xC0 # mov es, ax
.byte 0x66,0x8E,0xE0 # mov fs, ax
.byte 0x66,0x8E,0xE8 # mov gs, ax
.byte 0x66,0x8E,0xD0 # mov ss, ax ; Flat mode setup.
.byte 0xF,0x20,0xE0 # mov eax, cr4
.byte 0xF,0xBA,0xE8,0x5 # bts eax, 5
.byte 0xF,0x22,0xE0 # mov cr4, eax
.byte 0xF,0x22,0xD9 # mov cr3, ecx
.byte 0x8B,0xF2 # mov esi, edx ; Save wakeup buffer address
.byte 0xB9
.long 0xC0000080 # mov ecx, 0c0000080h ; EFER MSR number.
.byte 0xF,0x32 # rdmsr ; Read EFER.
.byte 0xF,0xBA,0xE8,0x8 # bts eax, 8 ; Set LME=1.
.byte 0xF,0x30 # wrmsr ; Write EFER.
.byte 0xF,0x20,0xC0 # mov eax, cr0 ; Read CR0.
.byte 0xF,0xBA,0xE8,0x1F # bts eax, 31 ; Set PG=1.
.byte 0xF,0x22,0xC0 # mov cr0, eax ; Write CR0.
LONG_JUMP:
.byte 0x67,0xEA # far jump
.long 0x0 # 32-bit offset
.word 0x38 # 16-bit selector
LongModeStart:
movw $0x30,%ax
.byte 0x66
movw %ax,%ds
.byte 0x66
movw %ax,%es
.byte 0x66
movw %ax,%ss
movl %esi,%edi
addl $LockLocation, %edi
movb $NotVacantFlag, %al
TestLock:
xchgb (%edi), %al
cmpb $NotVacantFlag, %al
jz TestLock
ProgramStack:
movl %esi,%edi
addl $StackSizeLocation, %edi
movq (%edi), %rax
movl %esi,%edi
addl $StackStartAddressLocation, %edi
addq (%edi), %rax
movq %rax, %rsp
movq %rax, (%edi)
Releaselock:
movb $VacantFlag, %al
movl %esi,%edi
addl $LockLocation, %edi
xchgb (%edi), %al
#
# Call assembly function to initialize FPU.
#
movabsq $ASM_PFX(InitializeFloatingPointUnits), %rax
subq $0x20, %rsp
call *%rax
addq $0x20, %rsp
#
# Call C Function
#
movl %esi,%edi
addl $CProcedureLocation, %edi
movq (%edi), %rax
testq %rax, %rax
jz GoToSleep
subq $0x20, %rsp
call *%rax
addq $0x20, %rsp
GoToSleep:
cli
hlt
jmp .-2
RendezvousFunnelProcEnd:
#-------------------------------------------------------------------------------------
# AsmGetAddressMap (&AddressMap);
#-------------------------------------------------------------------------------------
# comments here for definition of address map
ASM_GLOBAL ASM_PFX(AsmGetAddressMap)
ASM_PFX(AsmGetAddressMap):
movabsq $RendezvousFunnelProcStart, %rax
movq %rax, (%rcx)
movq $(NemInit - RendezvousFunnelProcStart), 0x08(%rcx)
movq $(FLAT32_JUMP - RendezvousFunnelProcStart), 0x10(%rcx)
movq $(RendezvousFunnelProcEnd - RendezvousFunnelProcStart), 0x18(%rcx)
movq $(LongModeStart - RendezvousFunnelProcStart), 0x20(%rcx)
movq $(LONG_JUMP - RendezvousFunnelProcStart), 0x28(%rcx)
ret
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