Annotation of sys/dev/rd.c, Revision 1.1.1.1
1.1 nbrk 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: }
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