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/* $NetBSD: devopen.c,v 1.8 2010/12/24 20:40:42 jakllsch Exp $ */
/*-
* Copyright (c) 2005 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Bang Jun-Young.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Copyright (c) 1996, 1997
* Matthias Drochner. 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/types.h>
#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>
#include <libi386.h>
#include <biosdisk.h>
#include "devopen.h"
#ifdef _STANDALONE
#include <bootinfo.h>
#endif
#ifdef SUPPORT_PS2
#include <biosmca.h>
#endif
static int dev2bios(char *, int, int *);
static int
dev2bios(char *devname, int unit, int *biosdev)
{
if (strcmp(devname, "hd") == 0)
*biosdev = 0x80 + unit;
else if (strcmp(devname, "fd") == 0)
*biosdev = 0x00 + unit;
else if (strcmp(devname, "cd") == 0)
*biosdev = boot_biosdev;
else
return ENXIO;
return 0;
}
void
bios2dev(int biosdev, daddr_t sector, char **devname, int *unit, int *partition)
{
/* set default */
*unit = biosdev & 0x7f;
if (biosdev & 0x80) {
/*
* There seems to be no standard way of numbering BIOS
* CD-ROM drives. The following method is a little tricky
* but works nicely.
*/
if (biosdev >= 0x80 + get_harddrives()) {
*devname = "cd";
*unit = 0; /* override default */
} else
*devname = "hd";
} else
*devname = "fd";
*partition = biosdisk_findpartition(biosdev, sector);
}
#ifdef _STANDALONE
struct btinfo_bootpath bibp;
extern bool kernel_loaded;
#endif
/*
* Open the BIOS disk device
*/
int
devopen(struct open_file *f, const char *fname, char **file)
{
char *fsname, *devname;
int unit, partition;
int biosdev;
int error;
if ((error = parsebootfile(fname, &fsname, &devname,
&unit, &partition, (const char **) file))
|| (error = dev2bios(devname, unit, &biosdev)))
return error;
f->f_dev = &devsw[0]; /* must be biosdisk */
#ifdef _STANDALONE
if (!kernel_loaded) {
strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath));
BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp));
}
#endif
return biosdisk_open(f, biosdev, partition);
}
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