2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2011 Nathan Whitehorn
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/types.h>
32 #include <sys/sysctl.h>
37 /* EFI partition size in bytes */
38 #define EFI_BOOTPART_SIZE (260 * 1024 * 1024)
43 static char fw[255] = "";
44 size_t len = sizeof(fw);
47 if (strlen(fw) == 0) {
48 error = sysctlbyname("machdep.bootmethod", fw, &len, NULL, -1);
59 if (strcmp(x86_bootmethod(), "UEFI") == 0)
66 is_scheme_bootable(const char *part_type)
69 if (strcmp(part_type, "GPT") == 0)
71 if (strcmp(x86_bootmethod(), "BIOS") == 0) {
72 if (strcmp(part_type, "BSD") == 0)
74 if (strcmp(part_type, "MBR") == 0)
82 is_fs_bootable(const char *part_type, const char *fs)
85 if (strcmp(fs, "freebsd-ufs") == 0)
88 if (strcmp(fs, "freebsd-zfs") == 0 &&
89 strcmp(part_type, "GPT") == 0 &&
90 strcmp(x86_bootmethod(), "BIOS") == 0)
97 bootpart_size(const char *scheme)
100 /* No partcode except for GPT */
101 if (strcmp(scheme, "GPT") != 0)
104 if (strcmp(x86_bootmethod(), "BIOS") == 0)
107 return (EFI_BOOTPART_SIZE);
113 bootpart_type(const char *scheme, const char **mountpoint)
116 if (strcmp(x86_bootmethod(), "UEFI") == 0)
119 return ("freebsd-boot");
123 bootcode_path(const char *part_type)
126 if (strcmp(x86_bootmethod(), "UEFI") == 0)
129 if (strcmp(part_type, "GPT") == 0)
130 return ("/boot/pmbr");
131 if (strcmp(part_type, "MBR") == 0)
132 return ("/boot/mbr");
133 if (strcmp(part_type, "BSD") == 0)
134 return ("/boot/boot");
140 partcode_path(const char *part_type, const char *fs_type)
143 if (strcmp(part_type, "GPT") == 0 && strcmp(x86_bootmethod(), "UEFI") != 0) {
144 if (strcmp(fs_type, "zfs") == 0)
145 return ("/boot/gptzfsboot");
147 return ("/boot/gptboot");
150 /* No partcode except for non-UEFI GPT */