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>
30 * MD bootstrap main() and assorted miscellaneous
37 #include <machine/bootinfo.h>
38 #include <machine/cpufunc.h>
39 #include <machine/psl.h>
41 #include <sys/param.h>
42 #include <sys/reboot.h>
44 #include "bootstrap.h"
45 #include "common/bootargs.h"
46 #include "libi386/libi386.h"
47 #include "libi386/smbios.h"
50 #ifdef LOADER_ZFS_SUPPORT
51 #include "../zfs/libzfs.h"
54 CTASSERT(sizeof(struct bootargs
) == BOOTARGS_SIZE
);
55 CTASSERT(offsetof(struct bootargs
, bootinfo
) == BA_BOOTINFO
);
56 CTASSERT(offsetof(struct bootargs
, bootflags
) == BA_BOOTFLAGS
);
57 CTASSERT(offsetof(struct bootinfo
, bi_size
) == BI_SIZE
);
59 /* Arguments passed in from the boot1/boot2 loader */
60 static struct bootargs
*kargs
;
62 static u_int32_t initial_howto
;
63 static u_int32_t initial_bootdev
;
64 static struct bootinfo
*initial_bootinfo
;
66 struct arch_switch archsw
; /* MI/MD interface boundary */
68 static void extract_currdev(void);
69 static int isa_inb(int port
);
70 static void isa_outb(int port
, int value
);
72 #ifdef LOADER_ZFS_SUPPORT
73 static void i386_zfs_probe(void);
77 extern char bootprog_info
[];
82 static void *heap_top
;
83 static void *heap_bottom
;
90 /* Pick up arguments */
91 kargs
= (void *)__args
;
92 initial_howto
= kargs
->howto
;
93 initial_bootdev
= kargs
->bootdev
;
94 initial_bootinfo
= kargs
->bootinfo
? (struct bootinfo
*)PTOV(kargs
->bootinfo
) : NULL
;
96 /* Initialize the v86 register set to a known-good state. */
97 bzero(&v86
, sizeof(v86
));
98 v86
.efl
= PSL_RESERVED_DEFAULT
| PSL_I
;
101 * Initialise the heap as early as possible. Once this is done, malloc() is usable.
105 #if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \
106 defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT)
107 if (high_heap_size
> 0) {
108 heap_top
= PTOV(high_heap_base
+ high_heap_size
);
109 heap_bottom
= PTOV(high_heap_base
);
110 if (high_heap_base
< memtop_copyin
)
111 memtop_copyin
= high_heap_base
;
115 heap_top
= (void *)PTOV(bios_basemem
);
116 heap_bottom
= (void *)end
;
118 setheap(heap_bottom
, heap_top
);
121 * XXX Chicken-and-egg problem; we want to have console output early, but some
122 * console attributes may depend on reading from eg. the boot device, which we
125 * We can use printf() etc. once this is done.
126 * If the previous boot stage has requested a serial console, prefer that.
128 bi_setboothowto(initial_howto
);
129 if (initial_howto
& RB_MULTIPLE
) {
130 if (initial_howto
& RB_SERIAL
)
131 setenv("console", "ttya text", 1);
133 setenv("console", "text ttya", 1);
134 } else if (initial_howto
& RB_SERIAL
)
135 setenv("console", "ttya", 1);
136 else if (initial_howto
& RB_MUTE
)
137 setenv("console", "null", 1);
141 * Initialise the block cache. Set the upper limit.
143 bcache_init(32768, 512);
146 * Special handling for PXE and CD booting.
148 if (kargs
->bootinfo
== 0) {
150 * We only want the PXE disk to try to init itself in the below
151 * walk through devsw if we actually booted off of PXE.
153 if (kargs
->bootflags
& KARGS_FLAGS_PXE
)
154 pxe_enable(kargs
->pxeinfo
? PTOV(kargs
->pxeinfo
) : NULL
);
155 else if (kargs
->bootflags
& KARGS_FLAGS_CD
)
156 bc_add(initial_bootdev
);
159 archsw
.arch_autoload
= i386_autoload
;
160 archsw
.arch_getdev
= i386_getdev
;
161 archsw
.arch_copyin
= i386_copyin
;
162 archsw
.arch_copyout
= i386_copyout
;
163 archsw
.arch_readin
= i386_readin
;
164 archsw
.arch_isainb
= isa_inb
;
165 archsw
.arch_isaoutb
= isa_outb
;
166 archsw
.arch_loadaddr
= i386_loadaddr
;
167 #ifdef LOADER_ZFS_SUPPORT
168 archsw
.arch_zfs_probe
= i386_zfs_probe
;
172 * March through the device switch probing for things.
174 for (i
= 0; devsw
[i
] != NULL
; i
++)
175 if (devsw
[i
]->dv_init
!= NULL
)
176 (devsw
[i
]->dv_init
)();
177 printf("BIOS %dkB/%dkB available memory\n", bios_basemem
/ 1024, bios_extmem
/ 1024);
178 if (initial_bootinfo
!= NULL
) {
179 initial_bootinfo
->bi_basemem
= bios_basemem
/ 1024;
180 initial_bootinfo
->bi_extmem
= bios_extmem
/ 1024;
183 /* detect ACPI for future reference */
186 /* detect SMBIOS for future reference */
189 /* detect PCI BIOS for future reference */
192 printf("\n%s", bootprog_info
);
194 extract_currdev(); /* set $currdev and $loaddev */
195 setenv("LINES", "24", 1); /* optional */
196 setenv("COLUMNS", "80", 1); /* optional */
199 setenv("ISADIR", "amd64", 1);
201 setenv("ISADIR", "", 1);
207 /* if we ever get here, it is an error */
212 * Set the 'current device' by (if possible) recovering the boot device as
213 * supplied by the initial bootstrap.
215 * XXX should be extended for netbooting.
218 extract_currdev(void)
220 struct i386_devdesc new_currdev
;
221 #ifdef LOADER_ZFS_SUPPORT
223 struct zfs_boot_args
*zargs
;
227 /* Assume we are booting from a BIOS disk by default */
228 new_currdev
.d_dev
= &biosdisk
;
230 /* new-style boot loaders such as pxeldr and cdldr */
231 if (kargs
->bootinfo
== 0) {
232 if ((kargs
->bootflags
& KARGS_FLAGS_CD
) != 0) {
233 /* we are booting from a CD with cdboot */
234 new_currdev
.d_dev
= &bioscd
;
235 new_currdev
.d_unit
= bc_bios2unit(initial_bootdev
);
236 } else if ((kargs
->bootflags
& KARGS_FLAGS_PXE
) != 0) {
237 /* we are booting from pxeldr */
238 new_currdev
.d_dev
= &pxedisk
;
239 new_currdev
.d_unit
= 0;
241 /* we don't know what our boot device is */
242 new_currdev
.d_kind
.biosdisk
.slice
= -1;
243 new_currdev
.d_kind
.biosdisk
.partition
= 0;
246 #ifdef LOADER_ZFS_SUPPORT
247 } else if ((kargs
->bootflags
& KARGS_FLAGS_ZFS
) != 0) {
249 /* check for new style extended argument */
250 if ((kargs
->bootflags
& KARGS_FLAGS_EXTARG
) != 0)
251 zargs
= (struct zfs_boot_args
*)(kargs
+ 1);
254 zargs
->size
>= offsetof(struct zfs_boot_args
, primary_pool
)) {
255 /* sufficient data is provided */
256 new_currdev
.d_kind
.zfs
.pool_guid
= zargs
->pool
;
257 new_currdev
.d_kind
.zfs
.root_guid
= zargs
->root
;
258 if (zargs
->size
>= sizeof(*zargs
) && zargs
->primary_vdev
!= 0) {
259 sprintf(buf
, "%llu", zargs
->primary_pool
);
260 setenv("vfs.zfs.boot.primary_pool", buf
, 1);
261 sprintf(buf
, "%llu", zargs
->primary_vdev
);
262 setenv("vfs.zfs.boot.primary_vdev", buf
, 1);
265 /* old style zfsboot block */
266 new_currdev
.d_kind
.zfs
.pool_guid
= kargs
->zfspool
;
267 new_currdev
.d_kind
.zfs
.root_guid
= 0;
269 new_currdev
.d_dev
= &zfs_dev
;
271 } else if ((initial_bootdev
& B_MAGICMASK
) != B_DEVMAGIC
) {
272 /* The passed-in boot device is bad */
273 new_currdev
.d_kind
.biosdisk
.slice
= -1;
274 new_currdev
.d_kind
.biosdisk
.partition
= 0;
277 new_currdev
.d_kind
.biosdisk
.slice
= B_SLICE(initial_bootdev
) - 1;
278 new_currdev
.d_kind
.biosdisk
.partition
= B_PARTITION(initial_bootdev
);
279 biosdev
= initial_bootinfo
->bi_bios_dev
;
282 * If we are booted by an old bootstrap, we have to guess at the BIOS
283 * unit number. We will lose if there is more than one disk type
284 * and we are not booting from the lowest-numbered disk type
285 * (ie. SCSI when IDE also exists).
287 if ((biosdev
== 0) && (B_TYPE(initial_bootdev
) != 2)) /* biosdev doesn't match major */
288 biosdev
= 0x80 + B_UNIT(initial_bootdev
); /* assume harddisk */
290 new_currdev
.d_type
= new_currdev
.d_dev
->dv_type
;
293 * If we are booting off of a BIOS disk and we didn't succeed in determining
294 * which one we booted off of, just use disk0: as a reasonable default.
296 if ((new_currdev
.d_type
== biosdisk
.dv_type
) &&
297 ((new_currdev
.d_unit
= bd_bios2unit(biosdev
)) == -1)) {
298 printf("Can't work out which disk we are booting from.\n"
299 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev
);
300 new_currdev
.d_unit
= 0;
303 #ifdef LOADER_ZFS_SUPPORT
305 if (new_currdev
.d_type
== DEVT_ZFS
)
306 init_zfs_bootenv(zfs_fmtdev(&new_currdev
));
310 env_setenv("currdev", EV_VOLATILE
, i386_fmtdev(&new_currdev
),
311 i386_setcurrdev
, env_nounset
);
312 env_setenv("loaddev", EV_VOLATILE
, i386_fmtdev(&new_currdev
), env_noset
,
316 COMMAND_SET(reboot
, "reboot", "reboot the system", command_reboot
);
319 command_reboot(int argc
, char *argv
[])
323 for (i
= 0; devsw
[i
] != NULL
; ++i
)
324 if (devsw
[i
]->dv_cleanup
!= NULL
)
325 (devsw
[i
]->dv_cleanup
)();
327 printf("Rebooting...\n");
332 /* provide this for panic, as it's not in the startup code */
339 COMMAND_SET(heap
, "heap", "show heap usage", command_heap
);
342 command_heap(int argc
, char *argv
[])
345 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom
,
350 #ifdef LOADER_ZFS_SUPPORT
351 COMMAND_SET(lszfs
, "lszfs", "list child datasets of a zfs dataset",
355 command_lszfs(int argc
, char *argv
[])
360 command_errmsg
= "wrong number of arguments";
364 err
= zfs_list(argv
[1]);
366 command_errmsg
= strerror(err
);
374 COMMAND_SET(reloadbe
, "reloadbe", "refresh the list of ZFS Boot Environments",
378 command_reloadbe(int argc
, char *argv
[])
384 command_errmsg
= "wrong number of arguments";
389 err
= zfs_bootenv(argv
[1]);
391 root
= getenv("zfs_be_root");
393 /* There does not appear to be a ZFS pool here, exit without error */
396 err
= zfs_bootenv(getenv("zfs_be_root"));
400 command_errmsg
= strerror(err
);
406 #endif /* __FreeBSD__ */
409 /* ISA bus access functions for PnP. */
418 isa_outb(int port
, int value
)
424 #ifdef LOADER_ZFS_SUPPORT
432 * Open all the disks we can find and see if we can reconstruct
433 * ZFS pools from them.
435 for (unit
= 0; unit
< MAXBDDEV
; unit
++) {
436 if (bd_unit2bios(unit
) == -1)
438 sprintf(devname
, "disk%d:", unit
);
439 zfs_probe_dev(devname
, NULL
);
444 ldi_get_size(void *priv
)
446 int fd
= (uintptr_t) priv
;
449 ioctl(fd
, DIOCGMEDIASIZE
, &size
);