110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
/* $NetBSD: devopen.c,v 1.2 2004/03/24 16:54:18 drochner Exp $ */
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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 __inline int dev2bios __P((char *, unsigned int, int *));
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static __inline int
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dev2bios(devname, unit, biosdev)
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char *devname;
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unsigned int unit;
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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
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return (ENXIO);
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return (0);
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}
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int
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bios2dev(int biosdev, char **devname, u_int *unit, u_int sector, u_int *ptnp)
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{
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if (biosdev & 0x80)
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*devname = "hd";
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else
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*devname = "fd";
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*unit = biosdev & 0x7f;
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*ptnp = biosdiskfindptn(biosdev, sector);
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return 0;
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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(f, fname, file)
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struct open_file *f;
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const char *fname;
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char **file;
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{
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char *fsname, *devname;
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unsigned int unit, partition;
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int biosdev;
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int error;
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struct devsw *dp;
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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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dp = &devsw[0]; /* must be biosdisk */
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f->f_dev = dp;
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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 (biosdiskopen(f, biosdev, partition));
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}
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