1 /* $NetBSD: bootinfo.c,v 1.3 2009/03/14 15:36:14 dsl 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
39 static char *bootinfo = NULL;
40 static char *bi_next;
41 static int bi_size;
42
43 u_long
bi_init(u_long addr)44 bi_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
68 void
bi_add(void * new,int type,size_t size)69 bi_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