bootxx.c revision 1.3 
1/*	$NetBSD: bootxx.c,v 1.3 2002/04/24 01:40:25 lukem Exp $ */
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Paul Kranenburg.
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. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * This is a generic "first-stage" boot program.
41 *
42 * Note that this program has absolutely no filesystem knowledge!
43 *
44 * Instead, this uses a table of disk block numbers that are
45 * filled in by the installboot program such that this program
46 * can load the "second-stage" boot program.
47 */
48
49#include <sys/param.h>
50#include <machine/mon.h>
51
52#include <dev/sun/sun_boot.h>
53
54#include <stand.h>
55#include "libsa.h"
56
57/*
58 * This is the address where we load the second-stage boot loader.
59 */
60#define LOADADDR	0x4000
61
62/*
63 * The contents of the sun68k_bbinfo below are set by installboot(8)
64 * to hold the filesystem data of the second-stage boot program
65 * (typically `/ufsboot'): filesystem block size, # of filesystem
66 * blocks and the block numbers themselves.
67 */
68struct sun68k_bbinfo bbinfo = {
69	{ SUN68K_BBINFO_MAGIC },
70	0,
71	MAXBLOCKNUM,
72	{ 0 }
73};
74
75int
76main()
77{
78	struct open_file	f;
79	void	*entry;
80	char	*addr;
81	int n, error;
82
83#ifdef DEBUG
84	printf("bootxx: open...\n");
85#endif
86	f.f_flags = F_RAW;
87	if (devopen(&f, 0, &addr)) {
88		printf("bootxx: devopen failed\n");
89		return;
90	}
91
92	addr = (char*)LOADADDR;
93	error = copyboot(&f, addr);
94	f.f_dev->dv_close(&f);
95	if (!error) {
96#ifdef DEBUG
97		printf("bootxx: start 0x%x\n", (long)addr);
98#endif
99		entry = addr;
100		chain_to(entry);
101	}
102	/* copyboot had a problem... */
103	return;
104}
105
106int
107copyboot(fp, addr)
108	struct open_file	*fp;
109	char			*addr;
110{
111	int	n, i, blknum;
112	char *buf;
113
114	/* Need to use a buffer that can be mapped into DVMA space. */
115	buf = alloc(bbinfo.bbi_block_size);
116	if (!buf)
117		panic("bootxx: alloc failed");
118
119	for (i = 0; i < bbinfo.bbi_block_count; i++) {
120
121		if ((blknum = bbinfo.bbi_block_table[i]) == 0)
122			break;
123
124#ifdef DEBUG
125		printf("bootxx: block # %d = %d\n", i, blknum);
126#endif
127		if ((fp->f_dev->dv_strategy)(fp->f_devdata, F_READ, blknum,
128					   bbinfo.bbi_block_size, buf, &n))
129		{
130			printf("bootxx: read failed\n");
131			return -1;
132		}
133		if (n != bbinfo.bbi_block_size) {
134			printf("bootxx: short read\n");
135			return -1;
136		}
137		bcopy(buf, addr, bbinfo.bbi_block_size);
138		addr += bbinfo.bbi_block_size;
139	}
140
141	return 0;
142}
143
144