#------------------------------------------------------------------------------ # # Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.
# 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.S # # Abstract: # # This is the assembly code for Multi-processor S3 support # #------------------------------------------------------------------------------ .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 PMODE_ENTRY: # 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 $(PMODE_ENTRY - 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