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/* $OpenBSD: biosprobe.c,v 1.3 2014/03/29 18:09:28 guenther Exp $ */
/*
* Copyright (c) 2002 Tobias Weingartner
* 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.
*
* 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 <sys/param.h>
#include <machine/biosvar.h>
#include <machine/pio.h>
#include <dev/cons.h>
#include <sys/disklabel.h>
#include "disk.h"
#include "libsa.h"
#include "biosdev.h"
void *
getSYSCONFaddr(void)
{
u_int32_t status;
u_int8_t *vers;
__asm volatile(DOINT(0x15) "\n\t"
"setc %%al\n\t"
: "=a" (status)
: "0" (0xC000)
: "%ebx", "%ecx", "%edx", "%esi", "%edi", "cc");
/* On failure we go for a NULL */
if (status)
return NULL;
/* Calculate where the version bytes are */
vers = (void*)((BIOS_regs.biosr_es << 4) | BIOS_regs.biosr_bx);
return vers;
}
void *
getEBDAaddr(void)
{
u_int32_t status;
u_int8_t *info;
info = getSYSCONFaddr();
if (!info)
return NULL;
__asm volatile(DOINT(0x15) "\n\t"
"setc %%al"
: "=a" (status)
: "0" (0xC100)
: "%ebx", "%ecx", "%edx", "%esi", "%edi", "cc");
if (status)
return NULL;
info = (void *)(BIOS_regs.biosr_es << 4);
return info;
}
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