pc98.c revision 268161 
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: stable/10/usr.bin/mkimg/pc98.c 268161 2014-07-02 14:54:41Z marcel $");
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
57static struct mkimg_alias pc98_aliases[] = {
58    {	ALIAS_FREEBSD, ALIAS_INT2TYPE(PC98_PTYP_386BSD) },
59    {	ALIAS_NONE, 0 }
60};
61
62static u_int
63pc98_metadata(u_int where)
64{
65	u_int secs;
66
67	secs = PC98_BOOTCODESZ / secsz;
68	return ((where == SCHEME_META_IMG_START) ? secs : 0);
69}
70
71static void
72pc98_chs(u_short *cyl, u_char *hd, u_char *sec, uint32_t lba __unused)
73{
74
75	*cyl = 0xffff;		/* XXX */
76	*hd = 0xff;		/* XXX */
77	*sec = 0xff;		/* XXX */
78}
79
80static int
81pc98_write(lba_t imgsz __unused, void *bootcode)
82{
83	struct part *part;
84	struct pc98_partition *dpbase, *dp;
85	u_char *buf;
86	int error, ptyp;
87
88	buf = malloc(PC98_BOOTCODESZ);
89	if (buf == NULL)
90		return (ENOMEM);
91	if (bootcode != NULL) {
92		memcpy(buf, bootcode, PC98_BOOTCODESZ);
93		memset(buf + secsz, 0, secsz);
94	} else
95		memset(buf, 0, PC98_BOOTCODESZ);
96	le16enc(buf + PC98_MAGICOFS, PC98_MAGIC);
97	dpbase = (void *)(buf + secsz);
98	STAILQ_FOREACH(part, &partlist, link) {
99		dp = dpbase + part->index;
100		ptyp = ALIAS_TYPE2INT(part->type);
101		dp->dp_mid = ptyp;
102		dp->dp_sid = ptyp >> 8;
103		pc98_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
104		    part->block);
105		pc98_chs(&dp->dp_scyl, &dp->dp_shd, &dp->dp_ssect,
106		    part->block + part->size - 1);
107		if (part->label != NULL)
108			memcpy(dp->dp_name, part->label, strlen(part->label));
109	}
110	error = image_write(0, buf, PC98_BOOTCODESZ / secsz);
111	free(buf);
112	return (error);
113}
114
115static struct mkimg_scheme pc98_scheme = {
116	.name = "pc98",
117	.description = "PC-9800 disk partitions",
118	.aliases = pc98_aliases,
119	.metadata = pc98_metadata,
120	.write = pc98_write,
121	.bootcode = PC98_BOOTCODESZ,
122	.labellen = 16,
123	.nparts = PC98_NPARTS,
124	.maxsecsz = 512
125};
126
127SCHEME_DEFINE(pc98_scheme);
128