2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * MD bootstrap main() and assorted miscellaneous
38 #include <machine/bootinfo.h>
39 #include <machine/cpufunc.h>
40 #include <machine/psl.h>
42 #include <sys/reboot.h>
43 #include <common/drv.h>
45 #include "bootstrap.h"
46 #include "common/bootargs.h"
47 #include "libi386/libi386.h"
48 #include "libi386/smbios.h"
51 #ifdef LOADER_ZFS_SUPPORT
52 #include "../zfs/libzfs.h"
55 CTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE);
56 CTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO);
57 CTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS);
58 CTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE);
60 /* Arguments passed in from the boot1/boot2 loader */
61 static struct bootargs *kargs;
63 static u_int32_t initial_howto;
64 static u_int32_t initial_bootdev;
65 static struct bootinfo *initial_bootinfo;
67 struct arch_switch archsw; /* MI/MD interface boundary */
69 static void extract_currdev(void);
70 static int isa_inb(int port);
71 static void isa_outb(int port, int value);
73 #ifdef LOADER_GELI_SUPPORT
75 struct geli_boot_args *gargs;
77 #ifdef LOADER_ZFS_SUPPORT
78 struct zfs_boot_args *zargs;
79 static void i386_zfs_probe(void);
83 extern char bootprog_info[];
88 static void *heap_top;
89 static void *heap_bottom;
96 /* Pick up arguments */
97 kargs = (void *)__args;
98 initial_howto = kargs->howto;
99 initial_bootdev = kargs->bootdev;
100 initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL;
102 /* Initialize the v86 register set to a known-good state. */
103 bzero(&v86, sizeof(v86));
104 v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
107 * Initialise the heap as early as possible. Once this is done, malloc() is usable.
111 #if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \
112 defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT)
113 if (high_heap_size > 0) {
114 heap_top = PTOV(high_heap_base + high_heap_size);
115 heap_bottom = PTOV(high_heap_base);
116 if (high_heap_base < memtop_copyin)
117 memtop_copyin = high_heap_base;
121 heap_top = (void *)PTOV(bios_basemem);
122 heap_bottom = (void *)end;
124 setheap(heap_bottom, heap_top);
127 * XXX Chicken-and-egg problem; we want to have console output early, but some
128 * console attributes may depend on reading from eg. the boot device, which we
131 * We can use printf() etc. once this is done.
132 * If the previous boot stage has requested a serial console, prefer that.
134 bi_setboothowto(initial_howto);
135 if (initial_howto & RB_MULTIPLE) {
136 if (initial_howto & RB_SERIAL)
137 setenv("console", "comconsole vidconsole", 1);
139 setenv("console", "vidconsole comconsole", 1);
140 } else if (initial_howto & RB_SERIAL)
141 setenv("console", "comconsole", 1);
142 else if (initial_howto & RB_MUTE)
143 setenv("console", "nullconsole", 1);
147 * Initialise the block cache. Set the upper limit.
149 bcache_init(32768, 512);
152 * Special handling for PXE and CD booting.
154 if (kargs->bootinfo == 0) {
156 * We only want the PXE disk to try to init itself in the below
157 * walk through devsw if we actually booted off of PXE.
159 if (kargs->bootflags & KARGS_FLAGS_PXE)
160 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL);
161 else if (kargs->bootflags & KARGS_FLAGS_CD)
162 bc_add(initial_bootdev);
165 archsw.arch_autoload = i386_autoload;
166 archsw.arch_getdev = i386_getdev;
167 archsw.arch_copyin = i386_copyin;
168 archsw.arch_copyout = i386_copyout;
169 archsw.arch_readin = i386_readin;
170 archsw.arch_isainb = isa_inb;
171 archsw.arch_isaoutb = isa_outb;
172 #ifdef LOADER_ZFS_SUPPORT
173 archsw.arch_zfs_probe = i386_zfs_probe;
175 #ifdef LOADER_GELI_SUPPORT
176 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) {
177 zargs = (struct zfs_boot_args *)(kargs + 1);
178 if (zargs != NULL && zargs->size >= offsetof(struct zfs_boot_args, gelipw)) {
179 if (zargs->size >= offsetof(struct zfs_boot_args, keybuf_sentinel) &&
180 zargs->keybuf_sentinel == KEYBUF_SENTINEL) {
181 geli_save_keybuf(zargs->keybuf);
183 if (zargs->gelipw[0] != '\0') {
184 setenv("kern.geom.eli.passphrase", zargs->gelipw, 1);
185 explicit_bzero(zargs->gelipw, sizeof(zargs->gelipw));
189 #endif /* LOADER_GELI_SUPPORT */
190 #else /* !LOADER_ZFS_SUPPORT */
191 #ifdef LOADER_GELI_SUPPORT
192 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) {
193 gargs = (struct geli_boot_args *)(kargs + 1);
194 if (gargs != NULL && gargs->size >= offsetof(struct geli_boot_args, gelipw)) {
195 if (gargs->keybuf_sentinel == KEYBUF_SENTINEL) {
196 geli_save_keybuf(gargs->keybuf);
198 if (gargs->gelipw[0] != '\0') {
199 setenv("kern.geom.eli.passphrase", gargs->gelipw, 1);
200 explicit_bzero(gargs->gelipw, sizeof(gargs->gelipw));
204 #endif /* LOADER_GELI_SUPPORT */
205 #endif /* LOADER_ZFS_SUPPORT */
208 * March through the device switch probing for things.
210 for (i = 0; devsw[i] != NULL; i++)
211 if (devsw[i]->dv_init != NULL)
212 (devsw[i]->dv_init)();
213 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024);
214 if (initial_bootinfo != NULL) {
215 initial_bootinfo->bi_basemem = bios_basemem / 1024;
216 initial_bootinfo->bi_extmem = bios_extmem / 1024;
219 /* detect ACPI for future reference */
222 /* detect SMBIOS for future reference */
225 /* detect PCI BIOS for future reference */
228 printf("\n%s", bootprog_info);
230 extract_currdev(); /* set $currdev and $loaddev */
231 setenv("LINES", "24", 1); /* optional */
237 /* if we ever get here, it is an error */
242 * Set the 'current device' by (if possible) recovering the boot device as
243 * supplied by the initial bootstrap.
245 * XXX should be extended for netbooting.
248 extract_currdev(void)
250 struct i386_devdesc new_currdev;
251 #ifdef LOADER_ZFS_SUPPORT
256 /* Assume we are booting from a BIOS disk by default */
257 new_currdev.d_dev = &biosdisk;
259 /* new-style boot loaders such as pxeldr and cdldr */
260 if (kargs->bootinfo == 0) {
261 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) {
262 /* we are booting from a CD with cdboot */
263 new_currdev.d_dev = &bioscd;
264 new_currdev.d_unit = bc_bios2unit(initial_bootdev);
265 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) {
266 /* we are booting from pxeldr */
267 new_currdev.d_dev = &pxedisk;
268 new_currdev.d_unit = 0;
270 /* we don't know what our boot device is */
271 new_currdev.d_kind.biosdisk.slice = -1;
272 new_currdev.d_kind.biosdisk.partition = 0;
275 #ifdef LOADER_ZFS_SUPPORT
276 } else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) {
278 /* check for new style extended argument */
279 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0)
280 zargs = (struct zfs_boot_args *)(kargs + 1);
283 zargs->size >= offsetof(struct zfs_boot_args, primary_pool)) {
284 /* sufficient data is provided */
285 new_currdev.d_kind.zfs.pool_guid = zargs->pool;
286 new_currdev.d_kind.zfs.root_guid = zargs->root;
287 if (zargs->size >= sizeof(*zargs) && zargs->primary_vdev != 0) {
288 sprintf(buf, "%llu", zargs->primary_pool);
289 setenv("vfs.zfs.boot.primary_pool", buf, 1);
290 sprintf(buf, "%llu", zargs->primary_vdev);
291 setenv("vfs.zfs.boot.primary_vdev", buf, 1);
294 /* old style zfsboot block */
295 new_currdev.d_kind.zfs.pool_guid = kargs->zfspool;
296 new_currdev.d_kind.zfs.root_guid = 0;
298 new_currdev.d_dev = &zfs_dev;
300 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) {
301 /* The passed-in boot device is bad */
302 new_currdev.d_kind.biosdisk.slice = -1;
303 new_currdev.d_kind.biosdisk.partition = 0;
306 new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1;
307 new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev);
308 biosdev = initial_bootinfo->bi_bios_dev;
311 * If we are booted by an old bootstrap, we have to guess at the BIOS
312 * unit number. We will lose if there is more than one disk type
313 * and we are not booting from the lowest-numbered disk type
314 * (ie. SCSI when IDE also exists).
316 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */
317 biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */
319 new_currdev.d_type = new_currdev.d_dev->dv_type;
322 * If we are booting off of a BIOS disk and we didn't succeed in determining
323 * which one we booted off of, just use disk0: as a reasonable default.
325 if ((new_currdev.d_type == biosdisk.dv_type) &&
326 ((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) {
327 printf("Can't work out which disk we are booting from.\n"
328 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev);
329 new_currdev.d_unit = 0;
332 #ifdef LOADER_ZFS_SUPPORT
333 if (new_currdev.d_type == DEVT_ZFS)
334 init_zfs_bootenv(zfs_fmtdev(&new_currdev));
337 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev),
338 i386_setcurrdev, env_nounset);
339 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset,
343 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
346 command_reboot(int argc, char *argv[])
350 for (i = 0; devsw[i] != NULL; ++i)
351 if (devsw[i]->dv_cleanup != NULL)
352 (devsw[i]->dv_cleanup)();
354 printf("Rebooting...\n");
359 /* provide this for panic, as it's not in the startup code */
366 COMMAND_SET(heap, "heap", "show heap usage", command_heap);
369 command_heap(int argc, char *argv[])
372 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom,
377 #ifdef LOADER_ZFS_SUPPORT
378 COMMAND_SET(lszfs, "lszfs", "list child datasets of a zfs dataset",
382 command_lszfs(int argc, char *argv[])
387 command_errmsg = "wrong number of arguments";
391 err = zfs_list(argv[1]);
393 command_errmsg = strerror(err);
400 COMMAND_SET(reloadbe, "reloadbe", "refresh the list of ZFS Boot Environments",
404 command_reloadbe(int argc, char *argv[])
410 command_errmsg = "wrong number of arguments";
415 err = zfs_bootenv(argv[1]);
417 root = getenv("zfs_be_root");
419 /* There does not appear to be a ZFS pool here, exit without error */
422 err = zfs_bootenv(root);
426 command_errmsg = strerror(err);
434 /* ISA bus access functions for PnP. */
443 isa_outb(int port, int value)
449 #ifdef LOADER_ZFS_SUPPORT
457 * Open all the disks we can find and see if we can reconstruct
458 * ZFS pools from them.
460 for (unit = 0; unit < MAXBDDEV; unit++) {
461 if (bd_unit2bios(unit) == -1)
463 sprintf(devname, "disk%d:", unit);
464 zfs_probe_dev(devname, NULL);
469 ldi_get_size(void *priv)
471 int fd = (uintptr_t) priv;
474 ioctl(fd, DIOCGMEDIASIZE, &size);