1/*	$NetBSD: inkernel.c,v 1.8 2008/05/26 16:28:39 kiyohara Exp $	*/
2
3/*-
4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Kazuki Sakamoto.
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 <lib/libsa/stand.h>
33#include <sys/param.h>
34#include "boot.h"
35#include "magic.h"
36
37#define	KERNENTRY	(RELOC - 0x200000)
38
39int inopen(struct open_file *);
40int inclose(struct open_file *);
41int instrategy(void *, int, daddr_t, size_t, void *, size_t *);
42
43void
44init_in(void)
45{
46	int p;
47
48	for (p = endaddr(); p < KERNENTRY; p += sizeof (int)) {
49		if (*(int *)p != BEBOX_ENTRY ||
50		    *(int *)(p + sizeof (int)) != 0 ||
51		    *(int *)(p + sizeof (int) * 2) != 0)
52			continue;
53
54		p += sizeof (int) * 3;
55		if (memcmp((char *)p, bebox_magic, BEBOX_MAGICSIZE) == 0) {
56			kern_len = *(int *)(p + BEBOX_MAGICSIZE);
57			memcpy((char *)KERNENTRY,
58				(char *)(p + BEBOX_MAGICSIZE + KERNLENSIZE),
59				kern_len);
60			break;
61		}
62	}
63}
64
65int
66inopen(struct open_file *p)
67{
68
69	if (kern_len)
70		return (0);
71	return (EINVAL);
72}
73
74int
75inclose(struct open_file *p)
76{
77
78	return (0);
79}
80
81int
82instrategy(void *devdata, int func, daddr_t blk, size_t size, void *buf,
83	   size_t *rsize)
84{
85
86	memcpy(buf, (char *)KERNENTRY + blk * DEV_BSIZE, size);
87	*rsize = size;
88	return (0);
89}
90