FreeBSD/Linux Kernel Cross Reference
sys/i386/setroot.c
1 /*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 */
26 /*
27 * HISTORY
28 * $Log: setroot.c,v $
29 * Revision 2.11 92/04/01 19:32:17 rpd
30 * Renamed gets to safe_gets.
31 * Fixed get_root_device.
32 * [92/03/31 rpd]
33 *
34 * Revision 2.10 92/02/19 16:29:33 elf
35 * Make atleast a half hearted attempt to use the info provide by
36 * the bootstrap to choose the boot device.
37 * [92/02/07 rvb]
38 *
39 * Revision 2.9 91/06/19 11:55:36 rvb
40 * cputypes.h->platforms.h
41 * [91/06/12 13:45:24 rvb]
42 *
43 * Revision 2.8 91/05/14 16:16:26 mrt
44 * Correcting copyright
45 *
46 * Revision 2.7 91/05/08 12:42:00 dbg
47 * Include platforms.h to get CPU names.
48 * [91/03/21 dbg]
49 *
50 * Revision 2.6 91/02/05 17:14:38 mrt
51 * Changed to new Mach copyright
52 * [91/02/01 17:37:59 mrt]
53 *
54 * Revision 2.5 90/12/04 14:46:35 jsb
55 * iPSC2 -> iPSC386.
56 * [90/12/04 11:19:36 jsb]
57 *
58 * Revision 2.4 90/11/24 15:14:53 jsb
59 * Added missing newline.
60 * [90/11/24 11:45:51 jsb]
61 *
62 * Revision 2.3 90/09/23 16:47:18 jsb
63 * If iPSC386, root device is sd (scsi), not hd.
64 *
65 * Revision 2.2 90/05/03 15:37:31 dbg
66 * Created.
67 * [90/02/20 dbg]
68 *
69 */
70
71 #include <platforms.h>
72 #include <sys/reboot.h>
73
74 extern int boottype;
75
76
77 /*
78 * Get root device. Temporarily hard-coded.
79 */
80 char root_string[5];
81
82 #if iPSC386
83 char *root_name = "sd0a";
84 get_root_device()
85 {
86 printf("root on %s\n", root_name);
87 }
88 #else iPSC386
89 char *root_name = root_string;
90
91 /*
92 * (4) (4) (4) (4) (8) (8)
93 * --------------------------------
94 * |MA | AD| CT| UN| PART | TYPE |
95 * --------------------------------
96 */
97
98 char *maj_devs[4] = { "hd", "fd", 0, "sd"};
99
100 get_root_device()
101 {
102 int type = boottype & 0xff;
103 int part = (boottype >> 8) & 0xff;
104 int unit = (boottype >> 16) & 0x7;
105
106 if ( (type > sizeof (maj_devs) / sizeof (char *)) ||
107 maj_devs[type] == 0) {
108 }
109
110 root_string[0] = maj_devs[type][0];
111 root_string[1] = maj_devs[type][1];
112 root_string[2] = '' + unit;
113 root_string[3] = 'a' + part;
114 root_string[4] = 0;
115
116 if (boothowto & RB_ASKNAME) {
117 char name[5];
118
119 printf("root device [%s]? ", root_name);
120 safe_gets(name, sizeof name);
121 if (*name != 0)
122 strcpy(root_name, name);
123 }
124 printf("root on %s\n", root_name);
125 }
126 #endif iPSC386
Cache object: f52e64bb2104935aa06b534662860b6c
|