151 lines
4.9 KiB
C
151 lines
4.9 KiB
C
/* $NetBSD: devopen.c,v 1.5 2005/12/11 12:17:47 christos Exp $ */
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/*-
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* Copyright (c) 2005 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Bang Jun-Young.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1996, 1997
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* Matthias Drochner. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#include <libi386.h>
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#include <biosdisk.h>
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#include "devopen.h"
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#ifdef _STANDALONE
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#include <bootinfo.h>
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#endif
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#ifdef SUPPORT_PS2
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#include <biosmca.h>
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#endif
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static int dev2bios(char *, int, int *);
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static int
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dev2bios(char *devname, int unit, int *biosdev)
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{
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if (strcmp(devname, "hd") == 0)
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*biosdev = 0x80 + unit;
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else if (strcmp(devname, "fd") == 0)
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*biosdev = 0x00 + unit;
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else if (strcmp(devname, "cd") == 0)
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*biosdev = boot_biosdev;
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else
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return ENXIO;
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return 0;
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}
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void
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bios2dev(int biosdev, u_int sector, char **devname, int *unit, int *partition)
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{
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/* set default */
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*unit = biosdev & 0x7f;
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if (biosdev & 0x80) {
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/*
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* There seems to be no standard way of numbering BIOS
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* CD-ROM drives. The following method is a little tricky
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* but works nicely.
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*/
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if (biosdev >= 0x80 + get_harddrives()) {
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*devname = "cd";
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*unit = 0; /* override default */
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} else
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*devname = "hd";
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} else
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*devname = "fd";
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*partition = biosdisk_findpartition(biosdev, sector);
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}
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#ifdef _STANDALONE
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struct btinfo_bootpath bibp;
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#endif
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/*
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* Open the BIOS disk device
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*/
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int
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devopen(struct open_file *f, const char *fname, char **file)
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{
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char *fsname, *devname;
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int unit, partition;
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int biosdev;
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int error;
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if ((error = parsebootfile(fname, &fsname, &devname,
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&unit, &partition, (const char **) file))
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|| (error = dev2bios(devname, unit, &biosdev)))
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return error;
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f->f_dev = &devsw[0]; /* must be biosdisk */
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#ifdef _STANDALONE
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strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath));
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BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp));
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#endif
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return biosdisk_open(f, biosdev, partition);
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}
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