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devopen.c revision 1.7
      1  1.7   tsutsui /*	$NetBSD: devopen.c,v 1.7 2005/02/20 13:59:27 tsutsui Exp $	*/
      2  1.2   thorpej 
      3  1.2   thorpej /*-
      4  1.2   thorpej  * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
      5  1.2   thorpej  * All rights reserved.
      6  1.2   thorpej  *
      7  1.2   thorpej  * This code is derived from software contributed to The NetBSD Foundation
      8  1.2   thorpej  * by Jason R. Thorpe.
      9  1.2   thorpej  *
     10  1.2   thorpej  * Redistribution and use in source and binary forms, with or without
     11  1.2   thorpej  * modification, are permitted provided that the following conditions
     12  1.2   thorpej  * are met:
     13  1.2   thorpej  * 1. Redistributions of source code must retain the above copyright
     14  1.2   thorpej  *    notice, this list of conditions and the following disclaimer.
     15  1.2   thorpej  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2   thorpej  *    notice, this list of conditions and the following disclaimer in the
     17  1.2   thorpej  *    documentation and/or other materials provided with the distribution.
     18  1.2   thorpej  * 3. All advertising materials mentioning features or use of this software
     19  1.2   thorpej  *    must display the following acknowledgement:
     20  1.2   thorpej  *	This product includes software developed by the NetBSD
     21  1.2   thorpej  *	Foundation, Inc. and its contributors.
     22  1.2   thorpej  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  1.2   thorpej  *    contributors may be used to endorse or promote products derived
     24  1.2   thorpej  *    from this software without specific prior written permission.
     25  1.2   thorpej  *
     26  1.2   thorpej  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  1.2   thorpej  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  1.2   thorpej  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  1.2   thorpej  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  1.2   thorpej  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  1.2   thorpej  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  1.2   thorpej  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  1.2   thorpej  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  1.2   thorpej  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  1.2   thorpej  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  1.2   thorpej  * POSSIBILITY OF SUCH DAMAGE.
     37  1.2   thorpej  */
     38  1.1   thorpej 
     39  1.1   thorpej /*-
     40  1.1   thorpej  *  Copyright (c) 1993 John Brezak
     41  1.1   thorpej  *  All rights reserved.
     42  1.1   thorpej  *
     43  1.1   thorpej  *  Redistribution and use in source and binary forms, with or without
     44  1.1   thorpej  *  modification, are permitted provided that the following conditions
     45  1.1   thorpej  *  are met:
     46  1.1   thorpej  *  1. Redistributions of source code must retain the above copyright
     47  1.1   thorpej  *     notice, this list of conditions and the following disclaimer.
     48  1.1   thorpej  *  2. Redistributions in binary form must reproduce the above copyright
     49  1.1   thorpej  *     notice, this list of conditions and the following disclaimer in the
     50  1.1   thorpej  *     documentation and/or other materials provided with the distribution.
     51  1.1   thorpej  *  3. The name of the author may not be used to endorse or promote products
     52  1.1   thorpej  *     derived from this software without specific prior written permission.
     53  1.1   thorpej  *
     54  1.1   thorpej  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
     55  1.1   thorpej  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     56  1.1   thorpej  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     57  1.1   thorpej  * DISCLAIMED.	IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     58  1.1   thorpej  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     59  1.1   thorpej  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     60  1.1   thorpej  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     61  1.1   thorpej  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     62  1.1   thorpej  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     63  1.1   thorpej  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     64  1.1   thorpej  * POSSIBILITY OF SUCH DAMAGE.
     65  1.1   thorpej  */
     66  1.1   thorpej 
     67  1.1   thorpej #include <sys/param.h>
     68  1.1   thorpej #include <sys/reboot.h>
     69  1.3  gmcgarry 
     70  1.3  gmcgarry #include <lib/libkern/libkern.h>
     71  1.1   thorpej 
     72  1.1   thorpej #include <lib/libsa/stand.h>
     73  1.1   thorpej #include <hp300/stand/common/samachdep.h>
     74  1.1   thorpej 
     75  1.1   thorpej u_int opendev;
     76  1.1   thorpej 
     77  1.1   thorpej #define ispart(c)	((c) >= 'a' && (c) <= 'h')
     78  1.1   thorpej 
     79  1.6   tsutsui static void usage(void);
     80  1.6   tsutsui static int devlookup(const char * ,int);
     81  1.6   tsutsui static int devparse(const char *, int *, int*, int*, int*, int*, char **);
     82  1.6   tsutsui 
     83  1.6   tsutsui int
     84  1.1   thorpej atoi(char *cp)
     85  1.1   thorpej {
     86  1.6   tsutsui 	int val = 0;
     87  1.6   tsutsui 
     88  1.6   tsutsui 	while (isdigit(*cp))
     89  1.6   tsutsui 		val = val * 10 + (*cp++ - '0');
     90  1.6   tsutsui 	return val;
     91  1.1   thorpej }
     92  1.1   thorpej 
     93  1.6   tsutsui void
     94  1.6   tsutsui usage(void)
     95  1.1   thorpej {
     96  1.6   tsutsui 
     97  1.6   tsutsui 	printf("Usage: device(adaptor, controller, drive, partition)file\n"
     98  1.6   tsutsui 	    "       <device><unit><partitionletter>:file\n");
     99  1.1   thorpej }
    100  1.1   thorpej 
    101  1.6   tsutsui static int
    102  1.7   tsutsui devlookup(const char *d, int len)
    103  1.1   thorpej {
    104  1.6   tsutsui 	struct devsw *dp = devsw;
    105  1.6   tsutsui 	int i;
    106  1.1   thorpej 
    107  1.6   tsutsui 	for (i = 0; i < ndevs; i++, dp++) {
    108  1.6   tsutsui 		if (dp->dv_name && strncmp(dp->dv_name, d, len) == 0) {
    109  1.6   tsutsui 			/*
    110  1.6   tsutsui 			 * Set the filesystem and startup up according to
    111  1.6   tsutsui 			 * the device being opened.
    112  1.6   tsutsui 			 */
    113  1.6   tsutsui 			switch (i) {
    114  1.6   tsutsui 			case 0:	/* ct */
    115  1.6   tsutsui 				memcpy(file_system, file_system_rawfs,
    116  1.6   tsutsui 				    sizeof(struct fs_ops));
    117  1.6   tsutsui 				break;
    118  1.6   tsutsui 
    119  1.6   tsutsui 			case 2:	/* rd */
    120  1.6   tsutsui 			case 4:	/* sd */
    121  1.6   tsutsui 				memcpy(file_system, file_system_ufs,
    122  1.6   tsutsui 				    sizeof(struct fs_ops));
    123  1.6   tsutsui 				break;
    124  1.6   tsutsui 
    125  1.6   tsutsui 			case 6:	/* le */
    126  1.6   tsutsui 				memcpy(file_system, file_system_nfs,
    127  1.6   tsutsui 				    sizeof(struct fs_ops));
    128  1.6   tsutsui 				break;
    129  1.6   tsutsui 
    130  1.6   tsutsui 			default:
    131  1.6   tsutsui 				/* Agh!  What happened?! */
    132  1.6   tsutsui 				goto bad;
    133  1.6   tsutsui 			}
    134  1.6   tsutsui 		return i;
    135  1.6   tsutsui 		}
    136  1.1   thorpej 	}
    137  1.1   thorpej 
    138  1.1   thorpej  bad:
    139  1.6   tsutsui 	printf("No such device - Configured devices are:\n");
    140  1.6   tsutsui 	for (dp = devsw, i = 0; i < ndevs; i++, dp++)
    141  1.6   tsutsui 		if (dp->dv_name)
    142  1.6   tsutsui 			printf(" %s", dp->dv_name);
    143  1.6   tsutsui 	printf("\n");
    144  1.6   tsutsui 	errno = ENODEV;
    145  1.6   tsutsui 	return -1;
    146  1.1   thorpej }
    147  1.1   thorpej 
    148  1.1   thorpej /*
    149  1.1   thorpej  * Parse a device spec in one of two forms.
    150  1.1   thorpej  *
    151  1.1   thorpej  * dev(adapt, ctlr, unit, part)file
    152  1.1   thorpej  * [A-Za-z]*[0-9]*[A-Za-z]:file
    153  1.1   thorpej  *    dev   unit  part
    154  1.1   thorpej  */
    155  1.6   tsutsui static int
    156  1.7   tsutsui devparse(const char *fname, int *dev, int *adapt, int *ctlr, int *unit,
    157  1.7   tsutsui     int *part, char **file)
    158  1.1   thorpej {
    159  1.6   tsutsui 	int i;
    160  1.6   tsutsui 	char *s, *args[4];
    161  1.5   tsutsui 
    162  1.6   tsutsui 	/* get device name */
    163  1.6   tsutsui 	for (s = (char *)fname; *s && *s != '/' && *s != ':' && *s != '('; s++)
    164  1.6   tsutsui 		;
    165  1.6   tsutsui 
    166  1.6   tsutsui 	/* first form */
    167  1.6   tsutsui 	if (*s == '(') {
    168  1.6   tsutsui 		/* lookup device and get index */
    169  1.6   tsutsui 		if ((*dev = devlookup(fname, s - fname)) < 0)
    170  1.6   tsutsui 			goto baddev;
    171  1.6   tsutsui 
    172  1.6   tsutsui 		/* tokenize device ident */
    173  1.6   tsutsui 		args[0] = ++s;
    174  1.6   tsutsui 		for (args[0] = s, i = 1; *s && *s != ')'; s++) {
    175  1.6   tsutsui 			if (*s == ',')
    176  1.6   tsutsui 				args[i++] = ++s;
    177  1.6   tsutsui 		}
    178  1.6   tsutsui 		switch(i) {
    179  1.6   tsutsui 		case 4:
    180  1.6   tsutsui 			*adapt = atoi(args[0]);
    181  1.6   tsutsui 			*ctlr  = atoi(args[1]);
    182  1.6   tsutsui 			*unit  = atoi(args[2]);
    183  1.6   tsutsui 			*part  = atoi(args[3]);
    184  1.6   tsutsui 			break;
    185  1.6   tsutsui 		case 3:
    186  1.6   tsutsui 			*ctlr  = atoi(args[0]);
    187  1.6   tsutsui 			*unit  = atoi(args[1]);
    188  1.6   tsutsui 			*part  = atoi(args[2]);
    189  1.6   tsutsui 			break;
    190  1.6   tsutsui 		case 2:
    191  1.6   tsutsui 			*unit  = atoi(args[0]);
    192  1.6   tsutsui 			*part  = atoi(args[1]);
    193  1.6   tsutsui 			break;
    194  1.6   tsutsui 		case 1:
    195  1.6   tsutsui 			*part  = atoi(args[0]);
    196  1.6   tsutsui 			break;
    197  1.6   tsutsui 		case 0:
    198  1.6   tsutsui 			break;
    199  1.6   tsutsui 		}
    200  1.6   tsutsui 		*file = ++s;
    201  1.1   thorpej 	}
    202  1.1   thorpej 
    203  1.6   tsutsui 	/* second form */
    204  1.6   tsutsui 	else if (*s == ':') {
    205  1.6   tsutsui 		int temp;
    206  1.1   thorpej 
    207  1.6   tsutsui 		/* isolate device */
    208  1.6   tsutsui 		for (s = (char *)fname; *s != ':' && !isdigit(*s); s++);
    209  1.1   thorpej 
    210  1.6   tsutsui 			/* lookup device and get index */
    211  1.6   tsutsui 			if ((*dev = devlookup(fname, s - fname)) < 0)
    212  1.6   tsutsui 				goto baddev;
    213  1.6   tsutsui 
    214  1.6   tsutsui 		/* isolate unit */
    215  1.6   tsutsui 		if ((temp = atoi(s)) > 255)
    216  1.6   tsutsui 			goto bad;
    217  1.6   tsutsui 		*adapt = temp / 8;
    218  1.6   tsutsui 		*ctlr = temp % 8;
    219  1.6   tsutsui 		for (; isdigit(*s); s++)
    220  1.6   tsutsui 			;
    221  1.1   thorpej 
    222  1.6   tsutsui 		/* translate partition */
    223  1.6   tsutsui 		if (!ispart(*s))
    224  1.6   tsutsui 			goto bad;
    225  1.1   thorpej 
    226  1.6   tsutsui 		*part = *s++ - 'a';
    227  1.6   tsutsui 		if (*s != ':')
    228  1.6   tsutsui 			goto bad;
    229  1.6   tsutsui 		*file = ++s;
    230  1.6   tsutsui 	}
    231  1.6   tsutsui 
    232  1.6   tsutsui 	/* no device present */
    233  1.6   tsutsui 	else
    234  1.6   tsutsui 		*file = (char *)fname;
    235  1.1   thorpej 
    236  1.6   tsutsui 	/* return the remaining unparsed part as the file to boot */
    237  1.6   tsutsui 	return 0;
    238  1.1   thorpej 
    239  1.1   thorpej  bad:
    240  1.6   tsutsui 	usage();
    241  1.1   thorpej 
    242  1.1   thorpej  baddev:
    243  1.6   tsutsui 	return -1;
    244  1.1   thorpej }
    245  1.1   thorpej 
    246  1.1   thorpej 
    247  1.6   tsutsui int
    248  1.7   tsutsui devopen(struct open_file *f, const char *fname, char **file)
    249  1.1   thorpej {
    250  1.6   tsutsui 	int error;
    251  1.1   thorpej 	int dev, adapt, ctlr, unit, part;
    252  1.1   thorpej 	struct devsw *dp = &devsw[0];
    253  1.1   thorpej 
    254  1.1   thorpej 	dev   = B_TYPE(bootdev);
    255  1.1   thorpej 	adapt = B_ADAPTOR(bootdev);
    256  1.1   thorpej 	ctlr  = B_CONTROLLER(bootdev);
    257  1.1   thorpej 	unit  = B_UNIT(bootdev);
    258  1.1   thorpej 	part  = B_PARTITION(bootdev);
    259  1.1   thorpej 
    260  1.6   tsutsui 	if ((error = devparse(fname, &dev, &adapt, &ctlr, &unit, &part, file))
    261  1.6   tsutsui 	    != 0)
    262  1.6   tsutsui 		return error;
    263  1.1   thorpej 
    264  1.1   thorpej 	/*
    265  1.1   thorpej 	 * Set up filesystem type based on what device we're opening.
    266  1.1   thorpej 	 */
    267  1.1   thorpej 	switch (dev) {
    268  1.1   thorpej 	case 0:		/* ct */
    269  1.6   tsutsui 		memcpy(file_system, file_system_rawfs, sizeof(struct fs_ops));
    270  1.1   thorpej 		break;
    271  1.1   thorpej 
    272  1.1   thorpej 	case 2:		/* rd */
    273  1.1   thorpej 	case 4:		/* sd */
    274  1.6   tsutsui 		memcpy(file_system, file_system_ufs, sizeof(struct fs_ops));
    275  1.1   thorpej 		break;
    276  1.1   thorpej 
    277  1.1   thorpej 	case 6:		/* le */
    278  1.6   tsutsui 		memcpy(file_system, file_system_nfs, sizeof(struct fs_ops));
    279  1.1   thorpej 		break;
    280  1.1   thorpej 
    281  1.1   thorpej 	default:
    282  1.1   thorpej 		/* XXX what else should we do here? */
    283  1.1   thorpej 		printf("WARNING: BOGUS BOOT DEV TYPE 0x%x!\n", dev);
    284  1.6   tsutsui 		return EIO;
    285  1.1   thorpej 	}
    286  1.1   thorpej 
    287  1.1   thorpej 	dp = &devsw[dev];
    288  1.1   thorpej 
    289  1.1   thorpej 	if (!dp->dv_open)
    290  1.6   tsutsui 		return ENODEV;
    291  1.1   thorpej 
    292  1.1   thorpej 	f->f_dev = dp;
    293  1.1   thorpej 
    294  1.1   thorpej 	if ((error = (*dp->dv_open)(f, adapt, ctlr, part)) == 0) {
    295  1.1   thorpej 		if ((error =
    296  1.1   thorpej 		    (*punitsw[dev].p_punit)(adapt, ctlr, &unit)) != 0) {
    297  1.1   thorpej 			goto bad;
    298  1.1   thorpej 		}
    299  1.1   thorpej 		opendev = MAKEBOOTDEV(dev, adapt, ctlr, unit, part);
    300  1.6   tsutsui 		return 0;
    301  1.1   thorpej 	}
    302  1.1   thorpej 
    303  1.1   thorpej  bad:
    304  1.1   thorpej 	printf("%s(%d,%d,%d,%d): %s\n", devsw[dev].dv_name,
    305  1.1   thorpej 	    adapt, ctlr, unit, part, strerror(error));
    306  1.1   thorpej 
    307  1.6   tsutsui 	return error;
    308  1.1   thorpej }
    309