1/*-
2 * Copyright (c) 2011 Nathan Whitehorn
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 * $FreeBSD: releng/11.0/usr.sbin/bsdinstall/partedit/partedit_x86.c 302145 2016-06-23 18:04:48Z emaste $
27 */
28
29#include <sys/types.h>
30#include <sys/sysctl.h>
31#include <string.h>
32
33#include "partedit.h"
34
35static const char *
36x86_bootmethod(void)
37{
38	static char fw[255] = "";
39	size_t len = sizeof(fw);
40	int error;
41
42	if (strlen(fw) == 0) {
43		error = sysctlbyname("machdep.bootmethod", fw, &len, NULL, -1);
44		if (error != 0)
45			return ("BIOS");
46	}
47
48	return (fw);
49}
50
51const char *
52default_scheme(void)
53{
54	if (strcmp(x86_bootmethod(), "UEFI") == 0)
55		return ("GPT");
56	else
57		return ("MBR");
58}
59
60int
61is_scheme_bootable(const char *part_type)
62{
63
64	if (strcmp(part_type, "GPT") == 0)
65		return (1);
66	if (strcmp(x86_bootmethod(), "BIOS") == 0) {
67		if (strcmp(part_type, "BSD") == 0)
68			return (1);
69		if (strcmp(part_type, "MBR") == 0)
70			return (1);
71	}
72
73	return (0);
74}
75
76int
77is_fs_bootable(const char *part_type, const char *fs)
78{
79
80	if (strcmp(fs, "freebsd-ufs") == 0)
81		return (1);
82
83	if (strcmp(fs, "freebsd-zfs") == 0 &&
84	    strcmp(part_type, "GPT") == 0 &&
85	    strcmp(x86_bootmethod(), "BIOS") == 0)
86		return (1);
87
88	return (0);
89}
90
91size_t
92bootpart_size(const char *scheme)
93{
94
95	/* No partcode except for GPT */
96	if (strcmp(scheme, "GPT") != 0)
97		return (0);
98
99	if (strcmp(x86_bootmethod(), "BIOS") == 0)
100		return (512*1024);
101	else
102		return (200*1024*1024);
103
104	return (0);
105}
106
107const char *
108bootpart_type(const char *scheme)
109{
110
111	if (strcmp(x86_bootmethod(), "UEFI") == 0)
112		return ("efi");
113
114	return ("freebsd-boot");
115}
116
117const char *
118bootcode_path(const char *part_type)
119{
120
121	if (strcmp(x86_bootmethod(), "UEFI") == 0)
122		return (NULL);
123
124	if (strcmp(part_type, "GPT") == 0)
125		return ("/boot/pmbr");
126	if (strcmp(part_type, "MBR") == 0)
127		return ("/boot/mbr");
128	if (strcmp(part_type, "BSD") == 0)
129		return ("/boot/boot");
130
131	return (NULL);
132}
133
134const char *
135partcode_path(const char *part_type, const char *fs_type)
136{
137
138	if (strcmp(part_type, "GPT") == 0) {
139		if (strcmp(x86_bootmethod(), "UEFI") == 0)
140			return ("/boot/boot1.efifat");
141		else if (strcmp(fs_type, "zfs") == 0)
142			return ("/boot/gptzfsboot");
143		else
144			return ("/boot/gptboot");
145	}
146
147	/* No partcode except for GPT */
148	return (NULL);
149}
150
151