1/*	$NetBSD: bootinfo.c,v 1.7 2010/01/10 09:34:45 tsutsui Exp $	*/
2
3/*-
4 * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jonathan Stone, Michael Hitch and Simon Burge.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <machine/types.h>
33#include <lib/libsa/stand.h>
34#include <lib/libkern/libkern.h>
35
36#include "boot.h"
37#include "bootinfo.h"
38
39static char *bootinfo = NULL;
40static char *bi_next;
41static int bi_size;
42
43char *
44bi_init(void)
45{
46	struct btinfo_common *bi;
47	struct btinfo_magic bi_magic;
48
49	if ((bootinfo = (char *)alloc(BOOTINFO_SIZE)) != NULL) {
50		bi = (struct btinfo_common *)bootinfo;
51		bi->next = bi->type = 0;
52		bi_next = bootinfo;
53		bi_size = 0;
54
55		bi_magic.magic = BOOTINFO_MAGIC;
56		bi_add(&bi_magic, BTINFO_MAGIC, sizeof(bi_magic));
57	}
58
59	return bootinfo;
60}
61
62void bi_add(void *new, int type, int size)
63{
64	struct btinfo_common *bi;
65
66	if (bi_size + size > BOOTINFO_SIZE)
67		return;				/* XXX error? */
68
69	if (bootinfo != NULL) {
70		DPRINTF(("Adding %d of size %d @0x%lx\n",
71		    type, size, (u_long)bi_next));
72
73		bi = new;
74		bi->next = size;
75		bi->type = type;
76		memcpy(bi_next, new, size);
77		bi_next += size;
78
79		bi = (struct btinfo_common *)bi_next;
80		bi->next = bi->type = 0;
81
82		bi_size += size;
83	}
84}
85