/*      $NetBSD: biosvideomode.S,v 1.3 2003/04/16 13:49:21 dsl Exp $    */

/*
* Copyright (c) 1996
*      Perry E. Metzger.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgements:
*      This product includes software developed for the NetBSD Project
*      by Perry E. Metzger.
* 4. The names of the authors may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/

#include <machine/asm.h>

       .text

ENTRY(biosvideomode)
       pushl   %ebp
       movl    %esp,%ebp
       pushl   %ebx
       push    %esi
       push    %edi

       call    _C_LABEL(prot_to_real)
       .code16

       movb    $0, %ah
       movb    $2, %al
       int     $0x10
       # zero-extend 16-bit result to 32 bits.
       movl    $0, %ebx
       movw    %ax,%bx

       calll   _C_LABEL(real_to_prot)
       .code32

       movl    %ebx, %eax

       pop     %edi
       pop     %esi
       popl    %ebx
       popl    %ebp
       ret