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 __FBSDID("$FreeBSD$"); 29 30 /* 31 * MD bootstrap main() and assorted miscellaneous 32 * commands. 33 */ 34 35 #include <stand.h> 36 #include <stddef.h> 37 #include <string.h> 38 #include <machine/bootinfo.h> 39 #include <machine/cpufunc.h> 40 #include <machine/psl.h> 41 #include <sys/disk.h> 42 #include <sys/reboot.h> 43 #include <common/drv.h> 44 45 #include "bootstrap.h" 46 #include "common/bootargs.h" 47 #include "libi386/libi386.h" 48 #include <smbios.h> 49 #include "btxv86.h" 50 51 #ifdef LOADER_ZFS_SUPPORT 52 #include <sys/zfs_bootenv.h> 53 #include "libzfs.h" 54 #endif 55 56 CTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE); 57 CTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO); 58 CTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS); 59 CTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE); 60 61 /* Arguments passed in from the boot1/boot2 loader */ 62 static struct bootargs *kargs; 63 64 static uint32_t initial_howto; 65 static uint32_t initial_bootdev; 66 static struct bootinfo *initial_bootinfo; 67 68 struct arch_switch archsw; /* MI/MD interface boundary */ 69 70 static void extract_currdev(void); 71 static int isa_inb(int port); 72 static void isa_outb(int port, int value); 73 void exit(int code); 74 #ifdef LOADER_GELI_SUPPORT 75 #include "geliboot.h" 76 struct geli_boot_args *gargs; 77 struct geli_boot_data *gbdata; 78 #endif 79 #ifdef LOADER_ZFS_SUPPORT 80 struct zfs_boot_args *zargs; 81 static void i386_zfs_probe(void); 82 #endif 83 84 /* XXX debugging */ 85 extern char end[]; 86 87 static void *heap_top; 88 static void *heap_bottom; 89 90 caddr_t 91 ptov(uintptr_t x) 92 { 93 return (PTOV(x)); 94 } 95 96 int 97 main(void) 98 { 99 int i; 100 101 /* Pick up arguments */ 102 kargs = (void *)__args; 103 initial_howto = kargs->howto; 104 initial_bootdev = kargs->bootdev; 105 initial_bootinfo = kargs->bootinfo ? 106 (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 107 108 /* Initialize the v86 register set to a known-good state. */ 109 bzero(&v86, sizeof(v86)); 110 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 111 112 /* 113 * Initialise the heap as early as possible. 114 * Once this is done, malloc() is usable. 115 */ 116 bios_getmem(); 117 118 #if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \ 119 defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT) 120 if (high_heap_size > 0) { 121 heap_top = PTOV(high_heap_base + high_heap_size); 122 heap_bottom = PTOV(high_heap_base); 123 if (high_heap_base < memtop_copyin) 124 memtop_copyin = high_heap_base; 125 } else 126 #endif 127 { 128 heap_top = (void *)PTOV(bios_basemem); 129 heap_bottom = (void *)end; 130 } 131 setheap(heap_bottom, heap_top); 132 133 /* 134 * Now that malloc is usable, allocate a buffer for tslog and start 135 * logging timestamps during the boot process. 136 */ 137 tslog_init(); 138 139 /* 140 * detect ACPI for future reference. This may set console to comconsole 141 * if we do have ACPI SPCR table. 142 */ 143 biosacpi_detect(); 144 145 /* 146 * XXX Chicken-and-egg problem; we want to have console output early, 147 * but some console attributes may depend on reading from eg. the boot 148 * device, which we can't do yet. 149 * 150 * We can use printf() etc. once this is done. 151 * If the previous boot stage has requested a serial console, 152 * prefer that. 153 */ 154 bi_setboothowto(initial_howto); 155 if (initial_howto & RB_MULTIPLE) { 156 if (initial_howto & RB_SERIAL) 157 setenv("console", "comconsole vidconsole", 1); 158 else 159 setenv("console", "vidconsole comconsole", 1); 160 } else if (initial_howto & RB_SERIAL) { 161 setenv("console", "comconsole", 1); 162 } else if (initial_howto & RB_MUTE) { 163 setenv("console", "nullconsole", 1); 164 } 165 cons_probe(); 166 167 /* Set up currdev variable to have hooks in place. */ 168 env_setenv("currdev", EV_VOLATILE | EV_NOHOOK, "", 169 i386_setcurrdev, env_nounset); 170 171 /* 172 * Initialise the block cache. Set the upper limit. 173 */ 174 bcache_init(32768, 512); 175 176 /* 177 * Special handling for PXE and CD booting. 178 */ 179 if (kargs->bootinfo == 0) { 180 /* 181 * We only want the PXE disk to try to init itself in the below 182 * walk through devsw if we actually booted off of PXE. 183 */ 184 if (kargs->bootflags & KARGS_FLAGS_PXE) 185 pxe_enable(kargs->pxeinfo ? 186 PTOV(kargs->pxeinfo) : NULL); 187 else if (kargs->bootflags & KARGS_FLAGS_CD) 188 bc_add(initial_bootdev); 189 } 190 191 archsw.arch_autoload = i386_autoload; 192 archsw.arch_getdev = i386_getdev; 193 archsw.arch_copyin = i386_copyin; 194 archsw.arch_copyout = i386_copyout; 195 archsw.arch_readin = i386_readin; 196 archsw.arch_isainb = isa_inb; 197 archsw.arch_isaoutb = isa_outb; 198 archsw.arch_hypervisor = x86_hypervisor; 199 #ifdef LOADER_ZFS_SUPPORT 200 archsw.arch_zfs_probe = i386_zfs_probe; 201 202 /* 203 * zfsboot and gptzfsboot have always passed KARGS_FLAGS_ZFS, 204 * so if that is set along with KARGS_FLAGS_EXTARG we know we 205 * can interpret the extarg data as a struct zfs_boot_args. 206 */ 207 #define KARGS_EXTARGS_ZFS (KARGS_FLAGS_EXTARG | KARGS_FLAGS_ZFS) 208 209 if ((kargs->bootflags & KARGS_EXTARGS_ZFS) == KARGS_EXTARGS_ZFS) { 210 zargs = (struct zfs_boot_args *)(kargs + 1); 211 } 212 #endif /* LOADER_ZFS_SUPPORT */ 213 214 #ifdef LOADER_GELI_SUPPORT 215 /* 216 * If we decided earlier that we have zfs_boot_args extarg data, 217 * and it is big enough to contain the embedded geli data 218 * (the early zfs_boot_args structs weren't), then init the gbdata 219 * pointer accordingly. If there is extarg data which isn't 220 * zfs_boot_args data, determine whether it is geli_boot_args data. 221 * Recent versions of gptboot set KARGS_FLAGS_GELI to indicate that. 222 * Earlier versions didn't, but we presume that's what we 223 * have if the extarg size exactly matches the size of the 224 * geli_boot_args struct during that pre-flag era. 225 */ 226 #define LEGACY_GELI_ARGS_SIZE 260 /* This can never change */ 227 228 #ifdef LOADER_ZFS_SUPPORT 229 if (zargs != NULL) { 230 if (zargs->size > offsetof(struct zfs_boot_args, gelidata)) { 231 gbdata = &zargs->gelidata; 232 } 233 } else 234 #endif /* LOADER_ZFS_SUPPORT */ 235 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) { 236 gargs = (struct geli_boot_args *)(kargs + 1); 237 if ((kargs->bootflags & KARGS_FLAGS_GELI) || 238 gargs->size == LEGACY_GELI_ARGS_SIZE) { 239 gbdata = &gargs->gelidata; 240 } 241 } 242 243 if (gbdata != NULL) 244 import_geli_boot_data(gbdata); 245 #endif /* LOADER_GELI_SUPPORT */ 246 247 /* 248 * March through the device switch probing for things. 249 */ 250 for (i = 0; devsw[i] != NULL; i++) 251 if (devsw[i]->dv_init != NULL) 252 (devsw[i]->dv_init)(); 253 254 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, 255 bios_extmem / 1024); 256 if (initial_bootinfo != NULL) { 257 initial_bootinfo->bi_basemem = bios_basemem / 1024; 258 initial_bootinfo->bi_extmem = bios_extmem / 1024; 259 } 260 261 /* detect SMBIOS for future reference */ 262 smbios_detect(NULL); 263 264 /* detect PCI BIOS for future reference */ 265 biospci_detect(); 266 267 printf("\n%s", bootprog_info); 268 269 extract_currdev(); /* set $currdev and $loaddev */ 270 autoload_font(true); 271 272 bios_getsmap(); 273 274 interact(); 275 276 /* if we ever get here, it is an error */ 277 return (1); 278 } 279 280 /* 281 * Set the 'current device' by (if possible) recovering the boot device as 282 * supplied by the initial bootstrap. 283 * 284 * XXX should be extended for netbooting. 285 */ 286 static void 287 extract_currdev(void) 288 { 289 struct i386_devdesc new_currdev; 290 #ifdef LOADER_ZFS_SUPPORT 291 char buf[20]; 292 char *bootonce; 293 #endif 294 int biosdev = -1; 295 296 /* Assume we are booting from a BIOS disk by default */ 297 new_currdev.dd.d_dev = &bioshd; 298 299 /* new-style boot loaders such as pxeldr and cdldr */ 300 if (kargs->bootinfo == 0) { 301 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 302 /* we are booting from a CD with cdboot */ 303 new_currdev.dd.d_dev = &bioscd; 304 new_currdev.dd.d_unit = bd_bios2unit(initial_bootdev); 305 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 306 /* we are booting from pxeldr */ 307 new_currdev.dd.d_dev = &pxedisk; 308 new_currdev.dd.d_unit = 0; 309 } else { 310 /* we don't know what our boot device is */ 311 new_currdev.disk.d_slice = -1; 312 new_currdev.disk.d_partition = 0; 313 biosdev = -1; 314 } 315 #ifdef LOADER_ZFS_SUPPORT 316 } else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) { 317 /* 318 * zargs was set in main() if we have new style extended 319 * argument 320 */ 321 if (zargs != NULL && 322 zargs->size >= 323 offsetof(struct zfs_boot_args, primary_pool)) { 324 /* sufficient data is provided */ 325 new_currdev.zfs.pool_guid = zargs->pool; 326 new_currdev.zfs.root_guid = zargs->root; 327 if (zargs->size >= sizeof(*zargs) && 328 zargs->primary_vdev != 0) { 329 sprintf(buf, "%llu", zargs->primary_pool); 330 setenv("vfs.zfs.boot.primary_pool", buf, 1); 331 sprintf(buf, "%llu", zargs->primary_vdev); 332 setenv("vfs.zfs.boot.primary_vdev", buf, 1); 333 } 334 } else { 335 /* old style zfsboot block */ 336 new_currdev.zfs.pool_guid = kargs->zfspool; 337 new_currdev.zfs.root_guid = 0; 338 } 339 new_currdev.dd.d_dev = &zfs_dev; 340 341 if ((bootonce = malloc(VDEV_PAD_SIZE)) != NULL) { 342 if (zfs_get_bootonce(&new_currdev, OS_BOOTONCE_USED, 343 bootonce, VDEV_PAD_SIZE) == 0) { 344 setenv("zfs-bootonce", bootonce, 1); 345 } 346 free(bootonce); 347 (void) zfs_attach_nvstore(&new_currdev); 348 } 349 350 #endif 351 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 352 /* The passed-in boot device is bad */ 353 new_currdev.disk.d_slice = -1; 354 new_currdev.disk.d_partition = 0; 355 biosdev = -1; 356 } else { 357 new_currdev.disk.d_slice = B_SLICE(initial_bootdev) - 1; 358 new_currdev.disk.d_partition = B_PARTITION(initial_bootdev); 359 biosdev = initial_bootinfo->bi_bios_dev; 360 361 /* 362 * If we are booted by an old bootstrap, we have to guess at 363 * the BIOS unit number. We will lose if there is more than 364 * one disk type and we are not booting from the 365 * lowest-numbered disk type (ie. SCSI when IDE also exists). 366 */ 367 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { 368 /* 369 * biosdev doesn't match major, assume harddisk 370 */ 371 biosdev = 0x80 + B_UNIT(initial_bootdev); 372 } 373 } 374 375 /* 376 * If we are booting off of a BIOS disk and we didn't succeed 377 * in determining which one we booted off of, just use disk0: 378 * as a reasonable default. 379 */ 380 if ((new_currdev.dd.d_dev->dv_type == bioshd.dv_type) && 381 ((new_currdev.dd.d_unit = bd_bios2unit(biosdev)) == -1)) { 382 printf("Can't work out which disk we are booting " 383 "from.\nGuessed BIOS device 0x%x not found by " 384 "probes, defaulting to disk0:\n", biosdev); 385 new_currdev.dd.d_unit = 0; 386 } 387 388 #ifdef LOADER_ZFS_SUPPORT 389 if (new_currdev.dd.d_dev->dv_type == DEVT_ZFS) 390 init_zfs_boot_options(devformat(&new_currdev.dd)); 391 #endif 392 393 env_setenv("currdev", EV_VOLATILE, devformat(&new_currdev.dd), 394 i386_setcurrdev, env_nounset); 395 env_setenv("loaddev", EV_VOLATILE, devformat(&new_currdev.dd), 396 env_noset, env_nounset); 397 } 398 399 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 400 401 static int 402 command_reboot(int argc, char *argv[]) 403 { 404 int i; 405 406 for (i = 0; devsw[i] != NULL; ++i) 407 if (devsw[i]->dv_cleanup != NULL) 408 (devsw[i]->dv_cleanup)(); 409 410 printf("Rebooting...\n"); 411 delay(1000000); 412 __exit(0); 413 } 414 415 /* provide this for panic, as it's not in the startup code */ 416 void 417 exit(int code) 418 { 419 __exit(code); 420 } 421 422 COMMAND_SET(heap, "heap", "show heap usage", command_heap); 423 424 static int 425 command_heap(int argc, char *argv[]) 426 { 427 mallocstats(); 428 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 429 sbrk(0), heap_top); 430 return (CMD_OK); 431 } 432 433 /* ISA bus access functions for PnP. */ 434 static int 435 isa_inb(int port) 436 { 437 438 return (inb(port)); 439 } 440 441 static void 442 isa_outb(int port, int value) 443 { 444 445 outb(port, value); 446 } 447 448 #ifdef LOADER_ZFS_SUPPORT 449 static void 450 i386_zfs_probe(void) 451 { 452 char devname[32]; 453 struct i386_devdesc dev; 454 455 /* 456 * Open all the disks we can find and see if we can reconstruct 457 * ZFS pools from them. 458 */ 459 dev.dd.d_dev = &bioshd; 460 for (dev.dd.d_unit = 0; bd_unit2bios(&dev) >= 0; dev.dd.d_unit++) { 461 snprintf(devname, sizeof(devname), "%s%d:", bioshd.dv_name, 462 dev.dd.d_unit); 463 zfs_probe_dev(devname, NULL); 464 } 465 } 466 #endif 467