1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* $NetBSD: rz.c,v 1.6 1995/06/28 10:22:35 jonathan Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* @(#)rz.c 8.1 (Berkeley) 6/10/93
*/
#include <stdarg.h>
#include <stand.h>
#include <sys/param.h>
#include <sys/disklabel.h>
#include "dec_prom.h"
struct rz_softc {
int sc_fd; /* PROM file id */
int sc_ctlr; /* controller number */
int sc_unit; /* disk unit number */
int sc_part; /* disk partition number */
struct disklabel sc_label; /* disk label for this disk */
};
int
rzstrategy(devdata, rw, bn, reqcnt, addr, cnt)
void *devdata;
int rw;
daddr_t bn;
u_int reqcnt;
char *addr;
u_int *cnt; /* out: number of bytes transfered */
{
register struct rz_softc *sc = (struct rz_softc *)devdata;
register int part = sc->sc_part;
register struct partition *pp = &sc->sc_label.d_partitions[part];
register int s;
long offset;
offset = bn * DEV_BSIZE;
#ifdef DEBUG
/*XXX*/printf("rz:%x %d\n", offset, reqcnt);
#endif
/*
* Partial-block transfers not handled.
*/
if (reqcnt & (DEV_BSIZE - 1)) {
*cnt = 0;
return (EINVAL);
}
offset += pp->p_offset * DEV_BSIZE;
if (callv == &callvec) {
/* No REX on this machine */
if (prom_lseek(sc->sc_fd, offset, 0) < 0)
return (EIO);
s = prom_read(sc->sc_fd, addr, reqcnt);
} else
s = bootread (offset / 512, addr, reqcnt);
if (s < 0)
return (EIO);
*cnt = s;
return (0);
}
int
rzopen(struct open_file *f, ...)
{
register int ctlr, unit, part;
register struct rz_softc *sc;
register struct disklabel *lp;
register int i;
char *msg;
char buf[DEV_BSIZE];
int cnt;
static char device[] = "rz(0,0,0)";
va_list ap;
va_start(ap, f);
ctlr = va_arg(ap, int);
unit = va_arg(ap, int);
part = va_arg(ap, int);
if (unit >= 8 || part >= 8)
return (ENXIO);
device[5] = '0' + unit;
/* NOTE: only support reads for now */
/* Another NOTE: bootinit on the TurboChannel doesn't look at
the device string - it's provided for compatibility with
the DS3100 PROMs. As a consequence, it may be possible to
boot from some other drive with these bootblocks on the 3100,
but will not be possible on any TurboChannel machine. */
if (callv == &callvec)
i = prom_open(device, 0);
else
i = bootinit (device);
if (i < 0) {
printf("boot init failed\n");
return (ENXIO);
}
sc = alloc(sizeof(struct rz_softc));
bzero(sc, sizeof(struct rz_softc));
f->f_devdata = (void *)sc;
sc->sc_fd = i;
sc->sc_ctlr = ctlr;
sc->sc_unit = unit;
sc->sc_part = part;
/* try to read disk label and partition table information */
lp = &sc->sc_label;
lp->d_secsize = DEV_BSIZE;
lp->d_secpercyl = 1;
lp->d_npartitions = MAXPARTITIONS;
lp->d_partitions[part].p_offset = 0;
lp->d_partitions[part].p_size = 0x7fffffff;
i = rzstrategy(sc, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt);
if (i || cnt != DEV_BSIZE) {
printf("rz%d: error reading disk label\n", unit);
goto bad;
} else {
msg = getdisklabel(buf, lp);
if (msg) {
printf("rz%d: %s\n", unit, msg);
goto bad;
}
}
if (part >= lp->d_npartitions || lp->d_partitions[part].p_size == 0) {
bad:
#ifndef SMALL
free(sc, sizeof(struct rz_softc));
#endif
return (ENXIO);
}
return (0);
}
#ifndef SMALL
rzclose(f)
struct open_file *f;
{
free(f->f_devdata, sizeof(struct rz_softc));
f->f_devdata = (void *)0;
return (0);
}
#endif
|
