;; @file
;; Initial system setup which needs to run in protected mode.
;;
;;
;; Copyright (C) 2004-2011 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
.286
ret
pmode_setup endp