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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1982, 1986, 1988 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | * | |
33 | * @(#)dev.c 7.14 (Berkeley) 5/5/91 | |
34 | */ | |
35 | ||
36 | #include <sys/param.h> | |
37 | #include <setjmp.h> | |
38 | #include "saio.h" | |
39 | ||
40 | /* | |
41 | * NB: the value "io->i_dev", used to offset the devsw[] array in the | |
42 | * routines below, is munged by the machine specific stand Makefiles | |
43 | * to work for certain boots. | |
44 | */ | |
45 | ||
46 | jmp_buf exception; | |
47 | ||
48 | devread(io) | |
49 | register struct iob *io; | |
50 | { | |
51 | int cc; | |
52 | ||
53 | io->i_flgs |= F_RDDATA; | |
54 | io->i_error = 0; | |
55 | cc = (*devsw[io->i_dev].dv_strategy)(io, F_READ); | |
56 | io->i_flgs &= ~F_TYPEMASK; | |
57 | #ifndef SMALL | |
58 | if (scankbd()) | |
59 | _longjmp(exception, 1); | |
60 | #endif | |
61 | return (cc); | |
62 | } | |
63 | ||
64 | devwrite(io) | |
65 | register struct iob *io; | |
66 | { | |
67 | int cc; | |
68 | ||
69 | io->i_flgs |= F_WRDATA; | |
70 | io->i_error = 0; | |
71 | cc = (*devsw[io->i_dev].dv_strategy)(io, F_WRITE); | |
72 | io->i_flgs &= ~F_TYPEMASK; | |
73 | #ifndef SMALL | |
74 | if (scankbd()) | |
75 | _longjmp(exception, 1); | |
76 | #endif | |
77 | return (cc); | |
78 | } | |
79 | ||
80 | devopen(io) | |
81 | register struct iob *io; | |
82 | { | |
83 | int ret; | |
84 | ||
85 | if (!(ret = (*devsw[io->i_dev].dv_open)(io))) | |
86 | return (0); | |
87 | #ifdef SMALL | |
88 | printf("open error\n"); | |
89 | #else | |
90 | printf("%s(%d,%d,%d,%d): ", devsw[io->i_dev].dv_name, | |
91 | io->i_adapt, io->i_ctlr, io->i_unit, io->i_part); | |
92 | switch(ret) { | |
93 | case EIO: | |
94 | break; /* already reported */ | |
95 | case EADAPT: | |
96 | printf("bad adaptor number\n"); | |
97 | break; | |
98 | case ECTLR: | |
99 | printf("bad controller number\n"); | |
100 | break; | |
101 | case EUNIT: | |
102 | printf("bad drive number\n"); | |
103 | break; | |
104 | case EPART: | |
105 | printf("bad partition\n"); | |
106 | break; | |
107 | case ERDLAB: | |
108 | printf("can't read disk label\n"); | |
109 | break; | |
110 | case EUNLAB: | |
111 | printf("unlabeled\n"); | |
112 | break; | |
113 | case ENXIO: | |
114 | printf("bad device specification\n"); | |
115 | break; | |
116 | default: | |
117 | printf("unknown open error\n"); | |
118 | break; | |
119 | } | |
120 | #endif | |
121 | return (ret); | |
122 | } | |
123 | ||
124 | devclose(io) | |
125 | register struct iob *io; | |
126 | { | |
127 | (*devsw[io->i_dev].dv_close)(io); | |
128 | } | |
129 | ||
130 | devioctl(io, cmd, arg) | |
131 | register struct iob *io; | |
132 | int cmd; | |
133 | caddr_t arg; | |
134 | { | |
135 | return ((*devsw[io->i_dev].dv_ioctl)(io, cmd, arg)); | |
136 | } | |
137 | ||
138 | /* ARGSUSED */ | |
139 | nullsys(io) | |
140 | struct iob *io; | |
141 | {} | |
142 | ||
143 | /* ARGSUSED */ | |
144 | nodev(io) | |
145 | struct iob *io; | |
146 | { | |
147 | errno = EBADF; | |
148 | return(-1); | |
149 | } | |
150 | ||
151 | /* ARGSUSED */ | |
152 | noioctl(io, cmd, arg) | |
153 | struct iob *io; | |
154 | int cmd; | |
155 | caddr_t arg; | |
156 | { | |
157 | return (ECMD); | |
158 | } |