1 /*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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
27 #include <sys/cdefs.h>
28
29 /*
30 * MD bootstrap main() and assorted miscellaneous
31 * commands.
32 */
33
34 #include <stand.h>
35 #include <stddef.h>
36 #include <string.h>
37 #include <machine/bootinfo.h>
38 #include <machine/cpufunc.h>
39 #include <machine/psl.h>
40 #include <sys/disk.h>
41 #include <sys/param.h>
42 #include <sys/reboot.h>
43
44 #include "bootstrap.h"
45 #include "common/bootargs.h"
46 #include "libi386/libi386.h"
47 #include "libi386/smbios.h"
48 #include "btxv86.h"
49
50 #ifdef LOADER_ZFS_SUPPORT
51 #include "../zfs/libzfs.h"
52 #endif
53
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);
58
59 /* Arguments passed in from the boot1/boot2 loader */
60 static struct bootargs *kargs;
61
62 static u_int32_t initial_howto;
63 static u_int32_t initial_bootdev;
64 static struct bootinfo *initial_bootinfo;
65
66 struct arch_switch archsw; /* MI/MD interface boundary */
67
68 static void extract_currdev(void);
69 static int isa_inb(int port);
70 static void isa_outb(int port, int value);
71 void exit(int code);
72 #ifdef LOADER_ZFS_SUPPORT
73 static void i386_zfs_probe(void);
74 #endif
75
76 /* from vers.c */
77 extern char bootprog_info[];
78
79 /* XXX debugging */
80 extern char end[];
81
82 static void *heap_top;
83 static void *heap_bottom;
84
85 int
86 main(void)
87 {
88 int i;
89
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;
95
96 /* Initialize the v86 register set to a known-good state. */
97 bzero(&v86, sizeof(v86));
98 v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
99
100 /*
101 * Initialise the heap as early as possible. Once this is done, malloc() is usable.
102 */
103 bios_getmem();
104
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;
112 } else
113 #endif
114 {
115 heap_top = (void *)PTOV(bios_basemem);
116 heap_bottom = (void *)end;
117 }
118 setheap(heap_bottom, heap_top);
119
120 /*
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
123 * can't do yet.
124 *
125 * We can use printf() etc. once this is done.
126 * If the previous boot stage has requested a serial console, prefer that.
127 */
128 bi_setboothowto(initial_howto);
129 if (initial_howto & RB_MULTIPLE) {
130 if (initial_howto & RB_SERIAL)
131 setenv("console", "ttya text", 1);
132 else
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);
138 cons_probe();
139
140 /*
141 * Initialise the block cache. Set the upper limit.
142 */
143 bcache_init(32768, 512);
144
145 /*
146 * Special handling for PXE and CD booting.
147 */
148 if (kargs->bootinfo == 0) {
149 /*
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.
152 */
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);
157 }
158
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;
169 #endif
170
171 /*
172 * March through the device switch probing for things.
173 */
174 for (i = 0; devsw[i] != NULL; i++)
175 if (devsw[i]->dv_init != NULL)
176 (devsw[i]->dv_init)();
177
178 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024);
179 if (initial_bootinfo != NULL) {
180 initial_bootinfo->bi_basemem = bios_basemem / 1024;
181 initial_bootinfo->bi_extmem = bios_extmem / 1024;
182 }
183
184 /* detect ACPI for future reference */
185 biosacpi_detect();
186
187 /* detect SMBIOS for future reference */
188 smbios_detect(NULL);
189
190 /* detect PCI BIOS for future reference */
191 biospci_detect();
192
193 printf("\n%s", bootprog_info);
194
195 extract_currdev(); /* set $currdev and $loaddev */
196 autoload_font(); /* Set up the font list for console. */
197
198 if (bi_checkcpu())
199 setenv("ISADIR", "amd64", 1);
200 else
201 setenv("ISADIR", "", 1);
202
203 bios_getsmap();
204
205 interact(NULL);
206
207 /* if we ever get here, it is an error */
208 return (1);
209 }
210
211 /*
212 * Set the 'current device' by (if possible) recovering the boot device as
213 * supplied by the initial bootstrap.
214 *
215 * XXX should be extended for netbooting.
216 */
217 static void
218 extract_currdev(void)
219 {
220 struct i386_devdesc new_currdev;
221 #ifdef LOADER_ZFS_SUPPORT
222 char buf[20];
223 struct zfs_boot_args *zargs;
224 #endif
225 int biosdev = -1;
226
227 /* Assume we are booting from a BIOS disk by default */
228 new_currdev.d_dev = &biosdisk;
229
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;
240 } else {
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;
244 biosdev = -1;
245 }
246 #ifdef LOADER_ZFS_SUPPORT
247 } else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) {
248 zargs = NULL;
249 /* check for new style extended argument */
250 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0)
251 zargs = (struct zfs_boot_args *)(kargs + 1);
252
253 if (zargs != NULL &&
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);
263 }
264 } else {
265 /* old style zfsboot block */
266 new_currdev.d_kind.zfs.pool_guid = kargs->zfspool;
267 new_currdev.d_kind.zfs.root_guid = 0;
268 }
269 new_currdev.d_dev = &zfs_dev;
270 #endif
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;
275 biosdev = -1;
276 } else {
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;
280
281 /*
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).
286 */
287 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */
288 biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */
289 }
290 new_currdev.d_type = new_currdev.d_dev->dv_type;
291
292 /*
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.
295 */
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;
301 }
302
303 #ifdef LOADER_ZFS_SUPPORT
304 #ifdef __FreeBSD__
305 if (new_currdev.d_type == DEVT_ZFS)
306 init_zfs_bootenv(zfs_fmtdev(&new_currdev));
307 #endif
308 #endif
309
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,
313 env_nounset);
314 }
315
316 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot);
317
318 static int
319 command_reboot(int argc, char *argv[])
320 {
321 int i;
322
323 for (i = 0; devsw[i] != NULL; ++i)
324 if (devsw[i]->dv_cleanup != NULL)
325 (devsw[i]->dv_cleanup)();
326
327 printf("Rebooting...\n");
328 delay(1000000);
329 __exit(0);
330 }
331
332 /* provide this for panic, as it's not in the startup code */
333 void
334 exit(int code)
335 {
336 __exit(code);
337 }
338
339 COMMAND_SET(heap, "heap", "show heap usage", command_heap);
340
341 static int
342 command_heap(int argc, char *argv[])
343 {
344 mallocstats();
345 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom,
346 sbrk(0), heap_top);
347 return(CMD_OK);
348 }
349
350 #ifdef LOADER_ZFS_SUPPORT
351 COMMAND_SET(lszfs, "lszfs", "list child datasets of a zfs dataset",
352 command_lszfs);
353
354 static int
355 command_lszfs(int argc, char *argv[])
356 {
357 int err;
358
359 if (argc != 2) {
360 command_errmsg = "wrong number of arguments";
361 return (CMD_ERROR);
362 }
363
364 err = zfs_list(argv[1]);
365 if (err != 0) {
366 command_errmsg = strerror(err);
367 return (CMD_ERROR);
368 }
369
370 return (CMD_OK);
371 }
372
373 #ifdef __FreeBSD__
374 COMMAND_SET(reloadbe, "reloadbe", "refresh the list of ZFS Boot Environments",
375 command_reloadbe);
376
377 static int
378 command_reloadbe(int argc, char *argv[])
379 {
380 int err;
381 char *root;
382
383 if (argc > 2) {
384 command_errmsg = "wrong number of arguments";
385 return (CMD_ERROR);
386 }
387
388 if (argc == 2) {
389 err = zfs_bootenv(argv[1]);
390 } else {
391 root = getenv("zfs_be_root");
392 if (root == NULL) {
393 /* There does not appear to be a ZFS pool here, exit without error */
394 return (CMD_OK);
395 }
396 err = zfs_bootenv(getenv("zfs_be_root"));
397 }
398
399 if (err != 0) {
400 command_errmsg = strerror(err);
401 return (CMD_ERROR);
402 }
403
404 return (CMD_OK);
405 }
406 #endif /* __FreeBSD__ */
407 #endif
408
409 /* ISA bus access functions for PnP. */
410 static int
411 isa_inb(int port)
412 {
413
414 return (inb(port));
415 }
416
417 static void
418 isa_outb(int port, int value)
419 {
420
421 outb(port, value);
422 }
423
424 #ifdef LOADER_ZFS_SUPPORT
425 static void
426 i386_zfs_probe(void)
427 {
428 char devname[32];
429 int unit;
430
431 /*
432 * Open all the disks we can find and see if we can reconstruct
433 * ZFS pools from them.
434 */
435 for (unit = 0; unit < MAXBDDEV; unit++) {
436 if (bd_unit2bios(unit) == -1)
437 break;
438 sprintf(devname, "disk%d:", unit);
439 zfs_probe_dev(devname, NULL);
440 }
441 }
442
443 uint64_t
444 ldi_get_size(void *priv)
445 {
446 int fd = (uintptr_t) priv;
447 uint64_t size;
448
449 ioctl(fd, DIOCGMEDIASIZE, &size);
450 return (size);
451 }
452 #endif