1/*	$NetBSD: bootinfo.c,v 1.2 2008/04/28 20:23:36 martin Exp $	*/
2
3/*-
4 * Copyright (c) 1999 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 <sys/param.h>
33#include <machine/types.h>
34#include <lib/libsa/stand.h>
35#include <lib/libkern/libkern.h>
36
37#include "bootinfo.h"
38
39static char *bootinfo = NULL;
40static char *bi_next;
41static int bi_size;
42
43u_long
44bi_init(u_long addr)
45{
46	struct btinfo_common *bi;
47	struct btinfo_magic bi_magic;
48	u_long *endp;
49
50	endp = (u_long *)ALIGN(addr);
51	/*
52	 * For the first word we load our end address,
53	 * giving enough space for the bootinfo structure.
54	 */
55	endp[0] = (u_long)((char *)endp + BOOTINFO_SIZE);
56	bootinfo = (char *)ALIGN(&endp[2]);
57	endp[1] = (u_long)bootinfo;
58	bi = (struct btinfo_common *)bootinfo;
59	bi->next = bi->type = 0;
60	bi_next = bootinfo;
61	bi_size = 0;
62
63	bi_magic.magic = BOOTINFO_MAGIC;
64	bi_add(&bi_magic, BTINFO_MAGIC, sizeof(bi_magic));
65	return (u_long) endp;
66}
67
68void
69bi_add(void *new, int type, size_t size)
70{
71	struct btinfo_common *bi;
72
73	if (bi_size + size > BOOTINFO_SIZE)
74		return;				/* XXX error? */
75
76	bi = new;
77	bi->next = ALIGN(size);
78	bi->type = type;
79	memcpy(bi_next, new, size);
80	bi_next += ALIGN(size);
81
82	bi = (struct btinfo_common *)bi_next;
83	bi->next = bi->type = 0;
84}
85