2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * Copyright (c) 1998,2000 Doug Rabson <dfr@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
36 #include "bootstrap.h"
38 #include "libuserboot.h"
40 #if defined(USERBOOT_ZFS_SUPPORT)
43 static void userboot_zfs_probe(void);
44 static int userboot_zfs_found;
47 /* Minimum version required */
48 #define USERBOOT_VERSION USERBOOT_VERSION_3
50 #define MALLOCSZ (64*1024*1024)
52 struct loader_callbacks *callbacks;
57 struct arch_switch archsw; /* MI/MD interface boundary */
59 static void extract_currdev(void);
65 CALLBACK(delay, usec);
77 loader_main(struct loader_callbacks *cb, void *arg, int version, int ndisks)
79 static char mallocbuf[MALLOCSZ];
83 if (version < USERBOOT_VERSION)
88 userboot_disk_maxunit = ndisks;
91 * initialise the heap as early as possible. Once this is done,
94 setheap((void *)mallocbuf, (void *)(mallocbuf + sizeof(mallocbuf)));
101 printf("\n%s", bootprog_info);
103 printf("Memory: %ld k\n", memsize() / 1024);
106 setenv("LINES", "24", 1); /* optional */
109 * Set custom environment variables
113 var = CALLBACK(getenv, i++);
119 archsw.arch_autoload = userboot_autoload;
120 archsw.arch_getdev = userboot_getdev;
121 archsw.arch_copyin = userboot_copyin;
122 archsw.arch_copyout = userboot_copyout;
123 archsw.arch_readin = userboot_readin;
124 #if defined(USERBOOT_ZFS_SUPPORT)
125 archsw.arch_zfs_probe = userboot_zfs_probe;
129 * Initialise the block cache. Set the upper limit.
131 bcache_init(32768, 512);
133 * March through the device switch probing for things.
135 for (i = 0; devsw[i] != NULL; i++)
136 if (devsw[i]->dv_init != NULL)
137 (devsw[i]->dv_init)();
144 interact(); /* doesn't return */
150 * Set the 'current device' by (if possible) recovering the boot device as
151 * supplied by the initial bootstrap.
154 extract_currdev(void)
156 struct disk_devdesc dev;
158 #if defined(USERBOOT_ZFS_SUPPORT)
159 struct zfs_devdesc zdev;
161 if (userboot_zfs_found) {
163 /* Leave the pool/root guid's unassigned */
164 bzero(&zdev, sizeof(zdev));
165 zdev.dd.d_dev = &zfs_dev;
167 init_zfs_bootenv(zfs_fmtdev(&zdev));
172 if (userboot_disk_maxunit > 0) {
173 dev.dd.d_dev = &userboot_disk;
178 * If we cannot auto-detect the partition type then
179 * access the disk as a raw device.
181 if (dev.dd.d_dev->dv_open(NULL, &dev)) {
183 dev.d_partition = -1;
187 dev.dd.d_dev = &host_dev;
192 env_setenv("currdev", EV_VOLATILE, userboot_fmtdev(dd),
193 userboot_setcurrdev, env_nounset);
194 env_setenv("loaddev", EV_VOLATILE, userboot_fmtdev(dd),
195 env_noset, env_nounset);
198 #if defined(USERBOOT_ZFS_SUPPORT)
200 userboot_zfs_probe(void)
207 * Open all the disks we can find and see if we can reconstruct
208 * ZFS pools from them. Record if any were found.
210 for (unit = 0; unit < userboot_disk_maxunit; unit++) {
211 sprintf(devname, "disk%d:", unit);
213 zfs_probe_dev(devname, &pool_guid);
215 userboot_zfs_found = 1;
220 COMMAND_SET(quit, "quit", "exit the loader", command_quit);
223 command_quit(int argc, char *argv[])
226 exit(USERBOOT_EXIT_QUIT);
230 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
233 command_reboot(int argc, char *argv[])
236 exit(USERBOOT_EXIT_REBOOT);