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
48 struct sector_io_ops __io_ops = {
49 sector_read,
50 sector_read_n,
51 sector_write,
52 sector_write_n
53 };
54
55 int
bfs_init(struct bfs ** bfsp)56 bfs_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
68 int
bfs_find(int * sector)69 bfs_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