1 /*        $NetBSD: devopen.c,v 1.11 2015/09/01 13:55:25 tsutsui Exp $ */
2 
3 /*
4  * Copyright (c) 1992 OMRON Corporation.
5  *
6  * This code is derived from software contributed to Berkeley by
7  * OMRON Corporation.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. All advertising materials mentioning features or use of this software
18  *    must display the following acknowledgement:
19  *        This product includes software developed by the University of
20  *        California, Berkeley and its contributors.
21  * 4. Neither the name of the University nor the names of its contributors
22  *    may be used to endorse or promote products derived from this software
23  *    without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  *        @(#)conf.c          8.1 (Berkeley) 6/10/93
38  */
39 /*
40  * Copyright (c) 1992, 1993
41  *        The Regents of the University of California.  All rights reserved.
42  *
43  * This code is derived from software contributed to Berkeley by
44  * OMRON Corporation.
45  *
46  * Redistribution and use in source and binary forms, with or without
47  * modification, are permitted provided that the following conditions
48  * are met:
49  * 1. Redistributions of source code must retain the above copyright
50  *    notice, this list of conditions and the following disclaimer.
51  * 2. Redistributions in binary form must reproduce the above copyright
52  *    notice, this list of conditions and the following disclaimer in the
53  *    documentation and/or other materials provided with the distribution.
54  * 3. Neither the name of the University nor the names of its contributors
55  *    may be used to endorse or promote products derived from this software
56  *    without specific prior written permission.
57  *
58  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
59  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
62  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68  * SUCH DAMAGE.
69  *
70  *        @(#)conf.c          8.1 (Berkeley) 6/10/93
71  */
72 
73 #include <lib/libkern/libkern.h>
74 #include <luna68k/stand/boot/samachdep.h>
75 #include <machine/disklabel.h>
76 
77 #define MAXDEVNAME  16
78 
79 int
devopen(struct open_file * f,const char * fname,char ** file)80 devopen(struct open_file *f, const char *fname, char **file)
81 {
82           int dev, unit, part;
83           int error;
84           struct devsw *dp;
85           int i;
86 
87           if (make_device(fname, &dev, &unit, &part, file) != 0)
88                     return ENXIO;
89 
90 #ifdef DEBUG
91           printf("%s: %s(%d,%d)%s\n", __func__,
92               devsw[dev].dv_name, unit, part, *file);
93 #endif
94           dp = &devsw[dev];
95           error = (*dp->dv_open)(f, unit, part);
96           if (error != 0) {
97 #ifdef DEBUG
98                     printf("%s: open %s(%d,%d)%s failed (%s)\n", __func__,
99                         devsw[dev].dv_name, unit, part, *file, strerror(error));
100 #endif
101                     return error;
102           }
103 
104           for (i = 0; i < nfsys_disk; i++)
105                     file_system[i] = file_system_disk[i];
106           nfsys = nfsys_disk;
107 
108 #ifdef SUPPORT_ETHERNET
109           if (strcmp(dp->dv_name, "le") == 0) {
110                     /* XXX mixing local fs_ops on netboot could be troublesome */
111                     file_system[0] = file_system_nfs[0];
112                     nfsys = 1;
113           }
114 #endif
115 
116           f->f_dev = dp;
117 
118           return 0;
119 }
120 
121 int
make_device(const char * str,int * devp,int * unitp,int * partp,char ** fname)122 make_device(const char *str, int *devp, int *unitp, int *partp, char **fname)
123 {
124           const char *cp;
125           struct devsw *dp;
126           int dev, unit, part;
127           int i;
128           char devname[MAXDEVNAME + 1];
129           bool haveunit;
130 
131           unit = 0;
132           part = 0;
133 
134           /*
135            * parse path strings
136            */
137           /* find end of dev type name */
138           for (cp = str, i = 0; *cp != '\0' && *cp != '(' && i < MAXDEVNAME; i++)
139                     devname[i] = *cp++;
140           if (*cp != '(') {
141                     /* no device name is specified; assume default */
142                     cp = str;
143                     /* compare dev type name */
144                     for (dp = devsw; dp->dv_name; dp++)
145                               if (!strcmp(default_bootdev, dp->dv_name))
146                                         break;
147                     if (dp->dv_name == NULL) {
148                               return -1;
149                     }
150                     dev = dp - devsw;
151                     unit = default_unit;
152           } else {
153                     devname[i] = '\0';
154                     /* compare dev type name */
155                     for (dp = devsw; dp->dv_name; dp++)
156                               if (!strcmp(devname, dp->dv_name))
157                                         break;
158                     cp++;
159                     if (dp->dv_name == NULL) {
160                               return -1;
161                     }
162                     dev = dp - devsw;
163                     /* get mixed controller and unit number */
164                     haveunit = false;
165                     for (; *cp != ',' && *cp != ')'; cp++) {
166                               if (*cp == '\0')
167                                         return -1;
168                               if (*cp >= '0' && *cp <= '9') {
169                                         unit = unit * 10 + *cp - '0';
170                                         haveunit = true;
171                               }
172                     }
173                     if (unit < 0 || CTLR(unit) >= 2 || TARGET(unit) > 7) {
174 #ifdef DEBUG
175                               printf("%s: invalid unit number (%d)\n",
176                                   __func__, unit);
177 #endif
178                               return -1;
179                     }
180                     if (!haveunit && strcmp(devname, default_bootdev) == 0)
181                               unit = default_unit;
182                     /* get optional partition number */
183                     if (*cp == ',')
184                               cp++;
185 
186                     for (; /* *cp != ',' && */ *cp != ')'; cp++) {
187                               if (*cp == '\0')
188                                         return -1;
189                               if (*cp >= '0' && *cp <= '9')
190                                         part = part * 10 + *cp - '0';
191                     }
192                     if (part < 0 || part >= MAXPARTITIONS) {
193 #ifdef DEBUG
194                               printf("%s: invalid partition number (%d)\n",
195                                   __func__, part);
196 #endif
197                               return -1;
198                     }
199                     cp++;
200           }
201           /* check out end of dev spec */
202           *devp  = dev;
203           *unitp = unit;
204           *partp = part;
205           if (fname != NULL) {
206                     if (*cp == '\0')
207                               *fname = "netbsd";
208                     else
209                               *fname = __UNCONST(cp);       /* XXX */
210           }
211 #ifdef DEBUG
212           printf("%s: dev = %d, unit = %d, part = %d, fname = %s\n",
213               __func__, dev, unit, part, fname != NULL ? *fname : "");
214 #endif
215 
216           return 0;
217 }
218