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/types.h>
31 #include <sys/diskpc98.h>
32 #include <sys/endian.h>
33 #include <sys/errno.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <unistd.h>
37
38 #include "image.h"
39 #include "mkimg.h"
40 #include "scheme.h"
41
42 #ifndef PC98_MAGIC
43 #define PC98_MAGIC 0xaa55
44 #endif
45 #ifndef PC98_MAGICOFS
46 #define PC98_MAGICOFS 510
47 #endif
48 #ifndef PC98_NPARTS
49 #define PC98_NPARTS 16
50 #endif
51 #ifndef PC98_PTYP_386BSD
52 #define PC98_PTYP_386BSD 0xc494
53 #endif
54
55 #define PC98_BOOTCODESZ 8192
56
57 static struct mkimg_alias pc98_aliases[] = {
58 { ALIAS_FREEBSD, ALIAS_INT2TYPE(PC98_PTYP_386BSD) },
59 { ALIAS_NONE, 0 }
60 };
61
62 static lba_t
pc98_metadata(u_int where,lba_t blk)63 pc98_metadata(u_int where, lba_t blk)
64 {
65 if (where == SCHEME_META_IMG_START)
66 blk += PC98_BOOTCODESZ / secsz;
67 return (round_track(blk));
68 }
69
70 static void
pc98_chs(u_short * cylp,u_char * hdp,u_char * secp,lba_t lba)71 pc98_chs(u_short *cylp, u_char *hdp, u_char *secp, lba_t lba)
72 {
73 u_int cyl, hd, sec;
74
75 mkimg_chs(lba, 0xffff, &cyl, &hd, &sec);
76 le16enc(cylp, cyl);
77 *hdp = hd;
78 *secp = sec;
79 }
80
81 static int
pc98_write(lba_t imgsz __unused,void * bootcode)82 pc98_write(lba_t imgsz __unused, void *bootcode)
83 {
84 struct part *part;
85 struct pc98_partition *dpbase, *dp;
86 u_char *buf;
87 lba_t size;
88 int error, ptyp;
89
90 buf = malloc(PC98_BOOTCODESZ);
91 if (buf == NULL)
92 return (ENOMEM);
93 if (bootcode != NULL) {
94 memcpy(buf, bootcode, PC98_BOOTCODESZ);
95 memset(buf + secsz, 0, secsz);
96 } else
97 memset(buf, 0, PC98_BOOTCODESZ);
98 le16enc(buf + PC98_MAGICOFS, PC98_MAGIC);
99 dpbase = (void *)(buf + secsz);
100 STAILQ_FOREACH(part, &partlist, link) {
101 size = round_track(part->size);
102 dp = dpbase + part->index;
103 ptyp = ALIAS_TYPE2INT(part->type);
104 dp->dp_mid = ptyp;
105 dp->dp_sid = ptyp >> 8;
106 pc98_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
107 part->block);
108 pc98_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
109 part->block + size - 1);
110 if (part->label != NULL)
111 memcpy(dp->dp_name, part->label, strlen(part->label));
112 }
113 error = image_write(0, buf, PC98_BOOTCODESZ / secsz);
114 free(buf);
115 return (error);
116 }
117
118 static struct mkimg_scheme pc98_scheme = {
119 .name = "pc98",
120 .description = "PC-9800 disk partitions",
121 .aliases = pc98_aliases,
122 .metadata = pc98_metadata,
123 .write = pc98_write,
124 .bootcode = PC98_BOOTCODESZ,
125 .labellen = 16,
126 .nparts = PC98_NPARTS,
127 .maxsecsz = 512
128 };
129
130 SCHEME_DEFINE(pc98_scheme);
131