1/*	$NetBSD: bfs_subr.c,v 1.5 2019/01/08 19:14:51 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2004 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by UCHIYAMA Yasushi.
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/cdefs.h>
33
34__KERNEL_RCSID(0, "$NetBSD: bfs_subr.c,v 1.5 2019/01/08 19:14:51 christos Exp $");
35#ifdef _STANDALONE
36#include <lib/libsa/stand.h>
37#include <lib/libkern/libkern.h>
38#include "local.h"
39#endif
40
41#include <sys/param.h>
42#include <sys/types.h>
43#include <sys/systm.h>
44#include <sys/errno.h>
45#include <machine/sector.h>
46#include <machine/bfs.h>
47
48struct sector_io_ops __io_ops = {
49	sector_read,
50	sector_read_n,
51	sector_write,
52	sector_write_n
53};
54
55int
56bfs_init(struct bfs **bfsp)
57{
58	int err, bfs_sector;
59
60	device_attach(2, 0, -1);	/* HARDDISK UNIT 0 */
61
62	if ((err = bfs_find(&bfs_sector)) != 0)
63		return err;
64
65	return bfs_init2(bfsp, bfs_sector, &__io_ops, false);
66}
67
68int
69bfs_find(int *sector)
70{
71	static uint8_t buf[DEV_BSIZE];
72	struct pdinfo_sector *pdinfo;
73	struct vtoc_sector *vtoc;
74	const struct ux_partition *bfs_partition;
75	int start;
76
77	/* Physical Disk INFOrmation */
78	pdinfo = (struct pdinfo_sector *)buf;
79	if (!pdinfo_sector(0, pdinfo) || !pdinfo_sanity(pdinfo))
80		return ENOENT;
81
82	/* `start' is logical sector start in UX partition table. */
83	start = pdinfo->logical_sector;
84
85	/* Volume Table Of Contents */
86	vtoc = (struct vtoc_sector *)buf;
87	if (!vtoc_sector(0, vtoc, start))
88		return ENOENT;
89
90	/* Boot File System partition */
91	if ((bfs_partition = vtoc_find_bfs(vtoc)) == 0)
92		return ENOENT;
93
94	*sector = start + bfs_partition->start_sector;
95
96	return 0;
97}
98