153 lines
4.3 KiB
NASM
153 lines
4.3 KiB
NASM
;------------------------------------------------------------------------------ ;
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; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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; Module Name:
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;
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; MpFuncs.nasm
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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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SECTION .text
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extern ASM_PFX(InitializeFloatingPointUnits)
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%define VacantFlag 0x0
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%define NotVacantFlag 0xff
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%define LockLocation RendezvousFunnelProcEnd - RendezvousFunnelProcStart
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%define StackStart LockLocation + 0x4
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%define StackSize LockLocation + 0x8
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%define RendezvousProc LockLocation + 0xC
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%define GdtrProfile LockLocation + 0x10
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%define IdtrProfile LockLocation + 0x16
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%define BufferStart LockLocation + 0x1C
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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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BITS 16
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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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mov ax, cs
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mov ds, ax
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mov es, ax
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mov ss, ax
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xor ax, ax
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mov fs, ax
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mov gs, ax
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flat32Start:
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mov si, BufferStart
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mov edx,dword [si] ; EDX is keeping the start address of wakeup buffer
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mov si, GdtrProfile
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o32 lgdt [cs:si]
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mov si, IdtrProfile
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o32 lidt [cs:si]
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xor ax, ax
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mov ds, ax
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mov eax, cr0 ; Get control register 0
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or eax, 0x000000001 ; Set PE bit (bit #0)
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mov cr0, eax
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FLAT32_JUMP:
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a32 jmp dword 0x20:0x0
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BITS 32
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PMODE_ENTRY: ; protected mode entry point
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mov ax, 0x8
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o16 mov ds, ax
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o16 mov es, ax
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o16 mov fs, ax
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o16 mov gs, ax
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o16 mov ss, ax ; Flat mode setup.
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mov esi, edx
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mov edi, esi
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add edi, LockLocation
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mov al, NotVacantFlag
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TestLock:
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xchg byte [edi], al
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cmp al, NotVacantFlag
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jz TestLock
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ProgramStack:
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mov edi, esi
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add edi, StackSize
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mov eax, dword [edi]
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mov edi, esi
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add edi, StackStart
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add eax, dword [edi]
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mov esp, eax
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mov dword [edi], eax
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Releaselock:
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mov al, VacantFlag
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mov edi, esi
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add edi, LockLocation
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xchg byte [edi], al
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;
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; Call assembly function to initialize FPU.
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;
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mov ebx, ASM_PFX(InitializeFloatingPointUnits)
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call ebx
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;
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; Call C Function
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;
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mov edi, esi
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add edi, RendezvousProc
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mov eax, dword [edi]
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test eax, eax
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jz GoToSleep
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call eax ; Call C function
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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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global ASM_PFX(AsmGetAddressMap)
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ASM_PFX(AsmGetAddressMap):
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pushad
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mov ebp,esp
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mov ebx, dword [ebp+0x24]
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mov dword [ebx], RendezvousFunnelProcStart
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mov dword [ebx+0x4], PMODE_ENTRY - RendezvousFunnelProcStart
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mov dword [ebx+0x8], FLAT32_JUMP - RendezvousFunnelProcStart
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mov dword [ebx+0xc], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
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popad
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ret
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