/* $NetBSD: devopen.c,v 1.2 2012/01/18 23:12:21 nonaka Exp $ */
/*-
* Copyright (c) 1993 John Brezak
* 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. The name of the author 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 <sys/param.h>
#include <sys/disklabel.h>
#include "boot.h"
#include "bootinfo.h"
#include "disk.h"
#include "unixdev.h"
static int dev2bios(char *devname, unsigned int unit, int *biosdev);
static int devlookup(char *d);
static int
dev2bios(char *devname, unsigned int unit, int *biosdev)
{
if (strcmp(devname, devname_hd) == 0) {
*biosdev = 0x80 + unit;
return 0;
} else if (strcmp(devname, devname_mmcd) == 0) {
*biosdev = 0x00 + unit;
return 0;
}
return ENXIO;
}
static int
devlookup(char *d)
{
struct devsw *dp = devsw;
int i;
for (i = 0; i < ndevs; i++, dp++) {
if ((dp->dv_name != NULL) && (strcmp(dp->dv_name, d) == 0)) {
return i;
}
}
printf("No such device - Configured devices are:\n");
for (dp = devsw, i = 0; i < ndevs; i++, dp++) {
if (dp->dv_name != NULL) {
printf(" %s", dp->dv_name);
}
}
printf("\n");
return -1;
}
int
devopen(struct open_file *f, const char *fname, char **file)
{
struct devsw *dp;
char *fsname, *devname;
u_int dev, unit, partition;
int biosdev;
int error;
#if defined(UNIX_DEBUG)
printf("devopen: fname = %s\n", fname ? fname : "(null)");
#endif
if ((error = parsebootfile(fname, &fsname, &devname, &unit, &partition,
(const char **)file)) != 0) {
return error;
}
#if defined(UNIX_DEBUG)
printf("devopen: devname = %s\n", devname);
#endif
dev = devlookup(devname);
if (dev == -1) {
#if defined(UNIX_DEBUG)
printf("devopen: devlookup failed\n");
#endif
return ENXIO;
}
dp = &devsw[dev];
if (dp->dv_open == NULL) {
#if defined(UNIX_DEBUG)
printf("devopen: dev->dv_open() == NULL\n");
#endif
return ENODEV;
}
f->f_dev = dp;
if (dev2bios(devname, unit, &biosdev) == 0) {
#if defined(UNIX_DEBUG)
printf("devopen: bios disk\n");
#endif
return unixopen(f, devname, unit, partition, *file);
}
#if defined(UNIX_DEBUG)
printf("devopen: dev->dv_open()\n");
#endif
if ((error = (*dp->dv_open)(f, devname, unit, partition, *file)) == 0) {
#if defined(UNIX_DEBUG)
printf("devopen: dev->dv_open() opened\n");
#endif
return 0;
}
printf("%s%d%c:%s : %s\n", dp->dv_name, unit, partition + 'a', *file,
strerror(error));
return error;
}