boot.c revision 1.1 
1/*	$NetBSD: boot.c,v 1.1 2001/06/14 12:57:16 fredette Exp $ */
2
3/*-
4 * Copyright (c) 1982, 1986, 1990, 1993
5 *	The Regents of the University of California.  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. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * 	@(#)boot.c	8.1 (Berkeley) 6/10/93
36 */
37
38#include <sys/param.h>
39#include <sys/reboot.h>
40#include <machine/mon.h>
41
42#include <stand.h>
43#include <loadfile.h>
44#include "libsa.h"
45
46/*
47 * Default the name (really tape segment number).
48 * The defaults assume the following tape layout:
49 *   segment 0:  tapeboot
50 *   segment 1:  netbsd.sun3  (RAMDISK3)
51 *   segment 2:  netbsd.sun3x (RAMDISK3X)
52 *   segment 3:  miniroot image
53 * Therefore, the default name is "1" or "2"
54 * for sun3 and sun3x respectively.
55 */
56
57char	defname[32] = "1";
58char	line[80];
59
60int
61main()
62{
63	char *cp, *file;
64	void *entry;
65	u_long marks[MARK_MAX];
66	int fd;
67
68	printf(">> %s tapeboot [%s]\n", bootprog_name, bootprog_rev);
69	prom_get_boot_info();
70
71	/*
72	 * Can not hold open the tape device as is done
73	 * in the other boot programs because it does
74	 * its position-to-segment on open.
75	 */
76
77	/* If running on a Sun3X, use segment 2. */
78	if (_is3x)
79		defname[0] = '2';
80	file = defname;
81
82	cp = prom_bootfile;
83	if (cp && *cp)
84		file = cp;
85
86	for (;;) {
87		if (prom_boothow & RB_ASKNAME) {
88			printf("tapeboot: segment? [%s]: ", defname);
89			gets(line);
90			if (line[0])
91				file = line;
92			else
93				file = defname;
94		} else
95			printf("tapeboot: loading segment %s\n", file);
96
97		marks[MARK_START] = KERN_LOADADDR;
98		if ((fd = loadfile(file, marks, LOAD_KERNEL)) != -1) {
99			break;
100		}
101		printf("tapeboot: segment %s: %s\n", file, strerror(errno));
102		prom_boothow |= RB_ASKNAME;
103	}
104	close(fd);
105
106	entry = (void *)marks[MARK_ENTRY];
107	printf("Starting program at 0x%x\n", entry);
108	chain_to(entry);
109}
110