1*58a2b000SEvgeniy Ivanov/* $NetBSD: biosvideomode.S,v 1.3 2003/04/16 13:49:21 dsl Exp $ */ 2*58a2b000SEvgeniy Ivanov 3*58a2b000SEvgeniy Ivanov/* 4*58a2b000SEvgeniy Ivanov * Copyright (c) 1996 5*58a2b000SEvgeniy Ivanov * Perry E. Metzger. All rights reserved. 6*58a2b000SEvgeniy Ivanov * 7*58a2b000SEvgeniy Ivanov * Redistribution and use in source and binary forms, with or without 8*58a2b000SEvgeniy Ivanov * modification, are permitted provided that the following conditions 9*58a2b000SEvgeniy Ivanov * are met: 10*58a2b000SEvgeniy Ivanov * 1. Redistributions of source code must retain the above copyright 11*58a2b000SEvgeniy Ivanov * notice, this list of conditions and the following disclaimer. 12*58a2b000SEvgeniy Ivanov * 2. Redistributions in binary form must reproduce the above copyright 13*58a2b000SEvgeniy Ivanov * notice, this list of conditions and the following disclaimer in the 14*58a2b000SEvgeniy Ivanov * documentation and/or other materials provided with the distribution. 15*58a2b000SEvgeniy Ivanov * 3. All advertising materials mentioning features or use of this software 16*58a2b000SEvgeniy Ivanov * must display the following acknowledgements: 17*58a2b000SEvgeniy Ivanov * This product includes software developed for the NetBSD Project 18*58a2b000SEvgeniy Ivanov * by Perry E. Metzger. 19*58a2b000SEvgeniy Ivanov * 4. The names of the authors may not be used to endorse or promote products 20*58a2b000SEvgeniy Ivanov * derived from this software without specific prior written permission. 21*58a2b000SEvgeniy Ivanov * 22*58a2b000SEvgeniy Ivanov * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23*58a2b000SEvgeniy Ivanov * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24*58a2b000SEvgeniy Ivanov * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25*58a2b000SEvgeniy Ivanov * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26*58a2b000SEvgeniy Ivanov * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27*58a2b000SEvgeniy Ivanov * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28*58a2b000SEvgeniy Ivanov * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29*58a2b000SEvgeniy Ivanov * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30*58a2b000SEvgeniy Ivanov * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31*58a2b000SEvgeniy Ivanov * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32*58a2b000SEvgeniy Ivanov * 33*58a2b000SEvgeniy Ivanov */ 34*58a2b000SEvgeniy Ivanov 35*58a2b000SEvgeniy Ivanov#include <machine/asm.h> 36*58a2b000SEvgeniy Ivanov 37*58a2b000SEvgeniy Ivanov .text 38*58a2b000SEvgeniy Ivanov 39*58a2b000SEvgeniy IvanovENTRY(biosvideomode) 40*58a2b000SEvgeniy Ivanov pushl %ebp 41*58a2b000SEvgeniy Ivanov movl %esp,%ebp 42*58a2b000SEvgeniy Ivanov pushl %ebx 43*58a2b000SEvgeniy Ivanov push %esi 44*58a2b000SEvgeniy Ivanov push %edi 45*58a2b000SEvgeniy Ivanov 46*58a2b000SEvgeniy Ivanov call _C_LABEL(prot_to_real) 47*58a2b000SEvgeniy Ivanov .code16 48*58a2b000SEvgeniy Ivanov 49*58a2b000SEvgeniy Ivanov movb $0, %ah 50*58a2b000SEvgeniy Ivanov movb $2, %al 51*58a2b000SEvgeniy Ivanov int $0x10 52*58a2b000SEvgeniy Ivanov # zero-extend 16-bit result to 32 bits. 53*58a2b000SEvgeniy Ivanov movl $0, %ebx 54*58a2b000SEvgeniy Ivanov movw %ax,%bx 55*58a2b000SEvgeniy Ivanov 56*58a2b000SEvgeniy Ivanov calll _C_LABEL(real_to_prot) 57*58a2b000SEvgeniy Ivanov .code32 58*58a2b000SEvgeniy Ivanov 59*58a2b000SEvgeniy Ivanov movl %ebx, %eax 60*58a2b000SEvgeniy Ivanov 61*58a2b000SEvgeniy Ivanov pop %edi 62*58a2b000SEvgeniy Ivanov pop %esi 63*58a2b000SEvgeniy Ivanov popl %ebx 64*58a2b000SEvgeniy Ivanov popl %ebp 65*58a2b000SEvgeniy Ivanov ret 66