1 /*-
2 * Copyright (c) 2014 Juniper Networks, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/errno.h>
31 #include <stdint.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <unistd.h>
35
36 #include <sys/diskpc98.h>
37
38 #include "endian.h"
39 #include "image.h"
40 #include "mkimg.h"
41 #include "scheme.h"
42
43 #ifndef PC98_MAGIC
44 #define PC98_MAGIC 0xaa55
45 #endif
46 #ifndef PC98_MAGICOFS
47 #define PC98_MAGICOFS 510
48 #endif
49 #ifndef PC98_NPARTS
50 #define PC98_NPARTS 16
51 #endif
52 #ifndef PC98_PTYP_386BSD
53 #define PC98_PTYP_386BSD 0xc494
54 #endif
55
56 #define PC98_BOOTCODESZ 8192
57
58 static struct mkimg_alias pc98_aliases[] = {
59 { ALIAS_FREEBSD, ALIAS_INT2TYPE(PC98_PTYP_386BSD) },
60 { ALIAS_NONE, 0 }
61 };
62
63 static lba_t
pc98_metadata(u_int where,lba_t blk)64 pc98_metadata(u_int where, lba_t blk)
65 {
66 if (where == SCHEME_META_IMG_START)
67 blk += PC98_BOOTCODESZ / secsz;
68 return (round_track(blk));
69 }
70
71 static void
pc98_chs(u_short * cylp,u_char * hdp,u_char * secp,lba_t lba)72 pc98_chs(u_short *cylp, u_char *hdp, u_char *secp, lba_t lba)
73 {
74 u_int cyl, hd, sec;
75
76 mkimg_chs(lba, 0xffff, &cyl, &hd, &sec);
77 le16enc(cylp, cyl);
78 *hdp = hd;
79 *secp = sec;
80 }
81
82 static int
pc98_write(lba_t imgsz __unused,void * bootcode)83 pc98_write(lba_t imgsz __unused, void *bootcode)
84 {
85 struct part *part;
86 struct pc98_partition *dpbase, *dp;
87 u_char *buf;
88 lba_t size;
89 int error, ptyp;
90
91 buf = malloc(PC98_BOOTCODESZ);
92 if (buf == NULL)
93 return (ENOMEM);
94 if (bootcode != NULL) {
95 memcpy(buf, bootcode, PC98_BOOTCODESZ);
96 memset(buf + secsz, 0, secsz);
97 } else
98 memset(buf, 0, PC98_BOOTCODESZ);
99 le16enc(buf + PC98_MAGICOFS, PC98_MAGIC);
100 dpbase = (void *)(buf + secsz);
101 TAILQ_FOREACH(part, &partlist, link) {
102 size = round_track(part->size);
103 dp = dpbase + part->index;
104 ptyp = ALIAS_TYPE2INT(part->type);
105 dp->dp_mid = ptyp;
106 dp->dp_sid = ptyp >> 8;
107 pc98_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
108 part->block);
109 pc98_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
110 part->block + size - 1);
111 if (part->label != NULL)
112 memcpy(dp->dp_name, part->label, strlen(part->label));
113 }
114 error = image_write(0, buf, PC98_BOOTCODESZ / secsz);
115 free(buf);
116 return (error);
117 }
118
119 static struct mkimg_scheme pc98_scheme = {
120 .name = "pc98",
121 .description = "PC-9800 disk partitions",
122 .aliases = pc98_aliases,
123 .metadata = pc98_metadata,
124 .write = pc98_write,
125 .bootcode = PC98_BOOTCODESZ,
126 .labellen = 16,
127 .nparts = PC98_NPARTS,
128 .maxsecsz = 512
129 };
130
131 SCHEME_DEFINE(pc98_scheme);
132