1 /** $MirOS: src/sys/dev/rd.c,v 1.3 2008/11/08 23:04:17 tg Exp $ */
2 /* $OpenBSD: rd.c,v 1.1 2001/05/11 07:04:47 deraadt Exp $ */
3
4 /*
5 * Copyright (c) 2004
6 * Thorsten "mirabilos" Glaser <tg@mirbsd.org>
7 * Copyright (c) 1995 Gordon W. Ross
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/reboot.h>
36
37 #include <dev/ramdisk.h>
38
39 extern int boothowto;
40
41 #ifndef MINIROOTSIZE
42 #define MINIROOTSIZE 512
43 #endif
44
45 #define ROOTBYTES (MINIROOTSIZE << DEV_BSHIFT)
46
47 /*
48 * This array will be patched to contain a file-system image.
49 * See the program: src/distrib/common/rdsetroot.c
50 */
51 #define RDARR_TXT "|This is the root ramdisk!\n"
52 u_int32_t rd_root_size = ROOTBYTES;
53 char rd_root_image[ROOTBYTES] = RDARR_TXT;
54 char rd_root_image_cmp[] = RDARR_TXT;
55 size_t rd_root_image_siz = sizeof(rd_root_image_cmp);
56
57 /*
58 * This is called during autoconfig.
59 */
60 void
rd_attach_hook(int unit,struct rd_conf * rd)61 rd_attach_hook(int unit, struct rd_conf *rd)
62 {
63 if (unit == 0) {
64 /* Setup root ramdisk */
65 rd->rd_addr = (caddr_t) rd_root_image;
66 rd->rd_size = (size_t) rd_root_size;
67 rd->rd_type = RD_KMEM_FIXED;
68 printf("rd%d: fixed, %d blocks\n", unit, MINIROOTSIZE);
69 }
70 }
71
72 /*
73 * This is called during open (i.e. mountroot)
74 */
75 void
rd_open_hook(int unit,struct rd_conf * rd)76 rd_open_hook(int unit, struct rd_conf *rd)
77 {
78 }
79