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; $Id: pmsetup.inc $
;; @file
; Initial system setup which needs to run in protected mode.
;
;
; Copyright (C) 2004-2019 Oracle Corporation
;
; This file is part of VirtualBox Open Source Edition (OSE), as
; available from http://www.virtualbox.org. This file is free software;
; you can redistribute it and/or modify it under the terms of the GNU
; General Public License (GPL) as published by the Free Software
; Foundation, in version 2 as it comes in the "COPYING" file of the
; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
;
SVR equ 0FEE000F0h
LVT_LINT0 equ 0FEE00350h
LVT_LINT1 equ 0FEE00360h
public pmode_setup
;; Enable the local APIC and program LINT0/LINT1 entries. Without that,
;; virtual wire interrupts could not be delivered. Note that the APIC must
;; be enabled first because when disabled, all LVTs are forced masked.
pmode_setup proc near
.386
push eax
push esi
pushf
cli ; Interrupts would kill us!
call pmode_enter
mov eax, cr0 ; Clear CR0.CD and CR0.NW
and eax, 09FFFFFFFh
mov cr0, eax
mov esi, SVR ; Program the SVR -- enable the APIC,
mov eax, 010Fh ; set spurious interrupt vector to 15
mov [esi], eax
mov esi, LVT_LINT0 ; Program LINT0 to ExtINT and unmask
mov eax, [esi]
and eax, 0FFFE00FFh
or ah, 7
mov [esi], eax
mov esi, LVT_LINT1 ; Program LINT1 to NMI and unmask
mov eax, [esi]
and eax, 0FFFE00FFh
or ah, 4
mov [esi], eax
call pmode_exit
popf
pop esi
pop eax
SET_DEFAULT_CPU_286
ret
pmode_setup endp
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