bootxx.c revision 1.13 
1/*	$NetBSD: bootxx.c,v 1.13 2005/06/03 07:11:20 martin 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#include <sys/param.h>
40#include <sys/time.h>
41#include <sys/exec.h>
42#include <sys/bootblock.h>
43
44#include <lib/libsa/stand.h>
45#include <string.h>
46
47#include <machine/promlib.h>
48#include <sparc/stand/common/promdev.h>
49
50int debug;
51int netif_debug;
52
53/*
54 * Boot device is derived from ROM provided information.
55 */
56const char		progname[] = "bootxx";
57struct open_file	io;
58
59/*
60 * The contents of the bbinfo below are set by installboot(8)
61 * to hold the filesystem data of the second-stage boot program
62 * (typically `/boot'): filesystem block size, # of filesystem
63 * blocks and the block numbers themselves.
64 */
65struct shared_bbinfo bbinfo = {
66	{ SPARC_BBINFO_MAGIC },
67	0,
68	SHARED_BBINFO_MAXBLOCKS,
69	{ 0 }
70};
71
72int	main __P((void));
73void	loadboot __P((struct open_file *, caddr_t));
74
75int
76main()
77{
78	char	*dummy1;
79	const char	*dummy;
80	void (*entry)__P((void *)) = (void (*)__P((void *)))PROM_LOADADDR;
81	void	*arg;
82
83#ifdef HEAP_VARIABLE
84	{
85		extern char end[];
86		setheap((void *)ALIGN(end), (void *)0xffffffff);
87	}
88#endif
89	prom_init();
90	dummy = prom_getbootpath();
91	if (dummy && *dummy != '\0')
92		strcpy(prom_bootdevice, dummy);
93	io.f_flags = F_RAW;
94	if (devopen(&io, 0, &dummy1)) {
95		panic("%s: can't open device `%s'", progname,
96			prom_bootdevice != NULL ? prom_bootdevice : "unknown");
97	}
98
99	(void)loadboot(&io, (caddr_t)PROM_LOADADDR);
100	(io.f_dev->dv_close)(&io);
101
102	arg = (prom_version() == PROM_OLDMON) ? (caddr_t)PROM_LOADADDR : romp;
103	(*entry)(arg);
104	_rtt();
105}
106
107void
108loadboot(f, addr)
109	struct open_file	*f;
110	char			*addr;
111{
112	int	i;
113	char	*buf;
114	size_t		n;
115	daddr_t		blk;
116
117	/*
118	 * Allocate a buffer that we can map into DVMA space; only
119	 * needed for sun4 architecture, but use it for all machines
120	 * to keep code size down as much as possible.
121	 */
122	buf = alloc(bbinfo.bbi_block_size);
123	if (buf == NULL)
124		panic("%s: alloc failed", progname);
125
126	for (i = 0; i < bbinfo.bbi_block_count; i++) {
127		if ((blk = bbinfo.bbi_block_table[i]) == 0)
128			panic("%s: block table corrupt", progname);
129
130#ifdef DEBUG
131		printf("%s: block # %d = %d\n", progname, i, blk);
132#endif
133		if ((f->f_dev->dv_strategy)(f->f_devdata, F_READ, blk,
134		    bbinfo.bbi_block_size, buf, &n)) {
135			printf("%s: read failure", progname);
136			_rtt();
137		}
138		bcopy(buf, addr, bbinfo.bbi_block_size);
139		if (n != bbinfo.bbi_block_size)
140			panic("%s: short read", progname);
141		if (i == 0) {
142			int m = N_GETMAGIC(*(struct exec *)addr);
143			if (m == ZMAGIC || m == NMAGIC || m == OMAGIC) {
144				/* Move exec header out of the way */
145				bcopy(addr, addr - sizeof(struct exec), n);
146				addr -= sizeof(struct exec);
147			}
148		}
149		addr += n;
150	}
151
152}
153
154/*
155 * We don't need the overlap handling feature that the libkern version
156 * of bcopy() provides. We DO need code compactness..
157 */
158void
159bcopy(src, dst, n)
160	const void *src;
161	void *dst;
162	size_t n;
163{
164	const char *p = src;
165	char *q = dst;
166
167	while (n-- > 0)
168		*q++ = *p++;
169}
170