mirror of https://github.com/acidanthera/audk.git
205 lines
8.0 KiB
ArmAsm
205 lines
8.0 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php.
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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# Module Name:
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#
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# MpFuncs.S
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#
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# Abstract:
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#
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# This is the assembly code for Multi-processor S3 support
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#
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#------------------------------------------------------------------------------
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.equ VacantFlag, 0x0
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.equ NotVacantFlag, 0xff
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.equ LockLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart
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.equ StackStartAddressLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x08
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.equ StackSizeLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x10
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.equ CProcedureLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x18
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.equ GdtrLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x20
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.equ IdtrLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x2A
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.equ BufferStartLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x34
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.equ Cr3OffsetLocation, RendezvousFunnelProcEnd - RendezvousFunnelProcStart + 0x38
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#-------------------------------------------------------------------------------------
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#RendezvousFunnelProc procedure follows. All APs execute their procedure. This
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#procedure serializes all the AP processors through an Init sequence. It must be
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#noted that APs arrive here very raw...ie: real mode, no stack.
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#ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
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#IS IN MACHINE CODE.
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#-------------------------------------------------------------------------------------
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#RendezvousFunnelProc (&WakeUpBuffer,MemAddress);
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.code:
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ASM_GLOBAL ASM_PFX(RendezvousFunnelProc)
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ASM_PFX(RendezvousFunnelProc):
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RendezvousFunnelProcStart:
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# At this point CS = 0x(vv00) and ip= 0x0.
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.byte 0x8c,0xc8 # mov ax, cs
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.byte 0x8e,0xd8 # mov ds, ax
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.byte 0x8e,0xc0 # mov es, ax
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.byte 0x8e,0xd0 # mov ss, ax
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.byte 0x33,0xc0 # xor ax, ax
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.byte 0x8e,0xe0 # mov fs, ax
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.byte 0x8e,0xe8 # mov gs, ax
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flat32Start:
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.byte 0xBE
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.word BufferStartLocation
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.byte 0x66,0x8B,0x14 # mov edx,dword ptr [si] ; EDX is keeping the start address of wakeup buffer
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.byte 0xBE
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.word Cr3OffsetLocation
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.byte 0x66,0x8B,0xC # mov ecx,dword ptr [si] ; ECX is keeping the value of CR3
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.byte 0xBE
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.word GdtrLocation
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.byte 0x66 # db 66h
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.byte 0x2E,0xF,0x1,0x14 # lgdt fword ptr cs:[si]
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.byte 0xBE
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.word IdtrLocation
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.byte 0x66 # db 66h
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.byte 0x2E,0xF,0x1,0x1C # lidt fword ptr cs:[si]
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.byte 0x33,0xC0 # xor ax, ax
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.byte 0x8E,0xD8 # mov ds, ax
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.byte 0xF,0x20,0xC0 # mov eax, cr0 ; Get control register 0
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.byte 0x66,0x83,0xC8,0x1 # or eax, 000000001h ; Set PE bit (bit #0)
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.byte 0xF,0x22,0xC0 # mov cr0, eax
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FLAT32_JUMP:
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.byte 0x66,0x67,0xEA # far jump
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.long 0x0 # 32-bit offset
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.word 0x20 # 16-bit selector
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PMODE_ENTRY: # protected mode entry point
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.byte 0x66,0xB8,0x18,0x0 # mov ax, 18h
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.byte 0x66,0x8E,0xD8 # mov ds, ax
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.byte 0x66,0x8E,0xC0 # mov es, ax
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.byte 0x66,0x8E,0xE0 # mov fs, ax
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.byte 0x66,0x8E,0xE8 # mov gs, ax
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.byte 0x66,0x8E,0xD0 # mov ss, ax ; Flat mode setup.
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.byte 0xF,0x20,0xE0 # mov eax, cr4
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.byte 0xF,0xBA,0xE8,0x5 # bts eax, 5
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.byte 0xF,0x22,0xE0 # mov cr4, eax
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.byte 0xF,0x22,0xD9 # mov cr3, ecx
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.byte 0x8B,0xF2 # mov esi, edx ; Save wakeup buffer address
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.byte 0xB9
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.long 0xC0000080 # mov ecx, 0c0000080h ; EFER MSR number.
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.byte 0xF,0x32 # rdmsr ; Read EFER.
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.byte 0xF,0xBA,0xE8,0x8 # bts eax, 8 ; Set LME=1.
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.byte 0xF,0x30 # wrmsr ; Write EFER.
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.byte 0xF,0x20,0xC0 # mov eax, cr0 ; Read CR0.
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.byte 0xF,0xBA,0xE8,0x1F # bts eax, 31 ; Set PG=1.
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.byte 0xF,0x22,0xC0 # mov cr0, eax ; Write CR0.
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LONG_JUMP:
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.byte 0x67,0xEA # far jump
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.long 0x0 # 32-bit offset
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.word 0x38 # 16-bit selector
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LongModeStart:
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movw $0x30,%ax
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.byte 0x66
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movw %ax,%ds
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.byte 0x66
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movw %ax,%es
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.byte 0x66
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movw %ax,%ss
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movl %esi,%edi
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addl $LockLocation, %edi
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movb $NotVacantFlag, %al
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TestLock:
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xchgb (%edi), %al
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cmpb $NotVacantFlag, %al
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jz TestLock
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ProgramStack:
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movl %esi,%edi
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addl $StackSizeLocation, %edi
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movq (%edi), %rax
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movl %esi,%edi
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addl $StackStartAddressLocation, %edi
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addq (%edi), %rax
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movq %rax, %rsp
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movq %rax, (%edi)
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Releaselock:
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movb $VacantFlag, %al
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movl %esi,%edi
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addl $LockLocation, %edi
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xchgb (%edi), %al
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#
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# Call assembly function to initialize FPU.
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#
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movabsq $ASM_PFX(InitializeFloatingPointUnits), %rax
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subq $0x20, %rsp
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call *%rax
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addq $0x20, %rsp
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#
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# Call C Function
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#
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movl %esi,%edi
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addl $CProcedureLocation, %edi
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movq (%edi), %rax
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testq %rax, %rax
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jz GoToSleep
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subq $0x20, %rsp
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call *%rax
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addq $0x20, %rsp
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GoToSleep:
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cli
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hlt
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jmp .-2
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RendezvousFunnelProcEnd:
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#-------------------------------------------------------------------------------------
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# AsmGetAddressMap (&AddressMap);
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#-------------------------------------------------------------------------------------
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# comments here for definition of address map
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ASM_GLOBAL ASM_PFX(AsmGetAddressMap)
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ASM_PFX(AsmGetAddressMap):
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movabsq $RendezvousFunnelProcStart, %rax
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movq %rax, (%rcx)
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movq $(PMODE_ENTRY - RendezvousFunnelProcStart), 0x08(%rcx)
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movq $(FLAT32_JUMP - RendezvousFunnelProcStart), 0x10(%rcx)
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movq $(RendezvousFunnelProcEnd - RendezvousFunnelProcStart), 0x18(%rcx)
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movq $(LongModeStart - RendezvousFunnelProcStart), 0x20(%rcx)
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movq $(LONG_JUMP - RendezvousFunnelProcStart), 0x28(%rcx)
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ret
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