1 /* $OpenBSD: rd.c,v 1.1 2001/05/11 07:04:47 deraadt Exp $ */
2
3 /*
4 * Copyright (c) 1995 Gordon W. Ross
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/reboot.h>
33
34 #include <dev/ramdisk.h>
35
36 extern int boothowto;
37
38 #ifndef MINIROOTSIZE
39 #define MINIROOTSIZE 512
40 #endif
41
42 #define ROOTBYTES (MINIROOTSIZE << DEV_BSHIFT)
43
44 /*
45 * This array will be patched to contain a file-system image.
46 * See the program: src/distrib/common/rdsetroot.c
47 */
48 u_int32_t rd_root_size = ROOTBYTES;
49 char rd_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
50
51 /*
52 * This is called during autoconfig.
53 */
54 void
55 rd_attach_hook(unit, rd)
56 int unit;
57 struct rd_conf *rd;
58 {
59 if (unit == 0) {
60 /* Setup root ramdisk */
61 rd->rd_addr = (caddr_t) rd_root_image;
62 rd->rd_size = (size_t) rd_root_size;
63 rd->rd_type = RD_KMEM_FIXED;
64 printf("rd%d: fixed, %d blocks\n", unit, MINIROOTSIZE);
65 }
66 }
67
68 /*
69 * This is called during open (i.e. mountroot)
70 */
71 void
72 rd_open_hook(unit, rd)
73 int unit;
74 struct rd_conf *rd;
75 {
76 }