inkernel.c revision 1.1 
1/*	$NetBSD: inkernel.c,v 1.1 2007/12/17 19:09:50 garbled 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 * 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 <lib/libsa/stand.h>
40#include <sys/param.h>
41
42#include "boot.h"
43#include "magic.h"
44
45#define	KERNENTRY	(RELOC - 0x200000)
46/*#define	KERNENTRY	(0x800000)*/
47/* Note that the iplcb lives in the 0x700000 range, so we need to avoid that*/
48
49void
50init_in(u_long ladr)
51{
52	extern char _start[], _edata[], _end[];
53	/*char *p = (char *)(ladr + _end); for loadaddr 0x0*/
54	char *p = (char *)(ladr + (_end - ladr));
55	u_int i;
56
57	printf("p=%p start %p edata %p end %p ladr %lx\n", p, _start, _edata, _end, ladr);
58
59	for (i = 0; i < 4096; i++, p++) {
60		if (memcmp(p, magic, MAGICSIZE) == 0) {
61			kern_len = *(int *)(p + MAGICSIZE);
62			printf("Found magic at 0x%x, kernel is size 0x%x\n", i, kern_len);
63			memmove((char *)KERNENTRY,
64				p + MAGICSIZE + KERNLENSIZE, kern_len);
65			return;
66		}
67	}
68	printf("magic is not found.\n");
69}
70
71int
72inopen(struct open_file *p)
73{
74
75	if (kern_len)
76		return (0);
77	return (EINVAL);
78}
79
80int
81inclose(struct open_file *p)
82{
83
84	return (0);
85}
86
87int
88instrategy(void *devdata, int func, daddr_t blk, size_t size, void *buf,
89	size_t *rsize)
90{
91
92	memcpy(buf, (char *)KERNENTRY + ((long)blk * DEV_BSIZE), size);
93	*rsize = size;
94	return (0);
95}
96