boot.c revision 1.4 
1/*	$NetBSD: boot.c,v 1.4 2005/01/22 15:36:12 chs 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. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * 	@(#)boot.c	8.1 (Berkeley) 6/10/93
32 */
33
34#include <sys/param.h>
35#include <sys/reboot.h>
36#include <machine/mon.h>
37
38#include <stand.h>
39#include <loadfile.h>
40#include "libsa.h"
41
42/*
43 * Default the name (really tape segment number).
44 * The defaults assume the following tape layout:
45 *   segment 0:  tapeboot
46 *   segment 1:  netbsd.sun3  (RAMDISK3)
47 *   segment 2:  netbsd.sun3x (RAMDISK3X)
48 *   segment 3:  miniroot image
49 *   segment 4:  netbsd.sun2  (RAMDISK)
50 * Therefore, the default name is "1" or "2" or "4"
51 * for sun3, sun3x, and sun2, respectively.
52 */
53
54char	defname[32] = "1";
55char	line[80];
56
57int
58main(void)
59{
60	char *cp, *file;
61	void *entry;
62	u_long marks[MARK_MAX];
63	u_long mark_start;
64	int fd;
65
66	printf(">> %s tapeboot [%s]\n", bootprog_name, bootprog_rev);
67	prom_get_boot_info();
68
69	/*
70	 * Can not hold open the tape device as is done
71	 * in the other boot programs because it does
72	 * its position-to-segment on open.
73	 */
74
75	/* Assume the Sun3/Sun3x load start. */
76	memset(marks, 0, sizeof(marks));
77	mark_start = 0;
78
79	/* If running on a Sun3X, use segment 2. */
80	if (_is3x)
81		defname[0] = '2';
82
83	/*
84	 * If running on a Sun2, use segment 4 and
85	 * do the special MMU setup.
86	 */
87	else if (_is2) {
88		defname[0] = '4';
89		mark_start = sun2_map_mem_load();
90	}
91
92	file = defname;
93
94	cp = prom_bootfile;
95	if (cp && *cp)
96		file = cp;
97
98	for (;;) {
99		if (prom_boothow & RB_ASKNAME) {
100			printf("tapeboot: segment? [%s]: ", defname);
101			gets(line);
102			if (line[0])
103				file = line;
104			else
105				file = defname;
106		} else
107			printf("tapeboot: loading segment %s\n", file);
108
109		marks[MARK_START] = mark_start;
110		if ((fd = loadfile(file, marks, LOAD_KERNEL)) != -1) {
111			break;
112		}
113		printf("tapeboot: segment %s: %s\n", file, strerror(errno));
114		prom_boothow |= RB_ASKNAME;
115	}
116	close(fd);
117
118	entry = (void *)marks[MARK_ENTRY];
119	if (_is2) {
120		printf("relocating program...");
121		entry = sun2_map_mem_run(entry);
122	}
123	printf("Starting program at 0x%x\n", entry);
124	chain_to(entry);
125}
126