pmsetup.inc revision 94fde0b66aced35ee31b2218ab4371f2a48888c1
;; @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.
;;
LVT0 equ 0FEE00350h
LVT1 equ 0FEE00360h
public pmode_setup
;; Program LVT0/LVT1 entries in the local APIC. Some Linux kernels (e.g., RHEL4
;; SMP 32-bit) expect the entries to be unmasked in virtual wire mode.
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, LVT0 ; Program LVT0 to ExtINT and unmask
mov eax, [esi]
and eax, 0FFFE00FFh
or ah, 7
mov [esi], eax
mov esi, LVT1 ; Program LVT1 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