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 /* 168 * Initialise the block cache. Set the upper limit. 169 */ 170 bcache_init(32768, 512); 171 172 /* 173 * Special handling for PXE and CD booting. 174 */ 175 if (kargs->bootinfo == 0) { 176 /* 177 * We only want the PXE disk to try to init itself in the below 178 * walk through devsw if we actually booted off of PXE. 179 */ 180 if (kargs->bootflags & KARGS_FLAGS_PXE) 181 pxe_enable(kargs->pxeinfo ? 182 PTOV(kargs->pxeinfo) : NULL); 183 else if (kargs->bootflags & KARGS_FLAGS_CD) 184 bc_add(initial_bootdev); 185 } 186 187 archsw.arch_autoload = i386_autoload; 188 archsw.arch_getdev = i386_getdev; 189 archsw.arch_copyin = i386_copyin; 190 archsw.arch_copyout = i386_copyout; 191 archsw.arch_readin = i386_readin; 192 archsw.arch_isainb = isa_inb; 193 archsw.arch_isaoutb = isa_outb; 194 archsw.arch_hypervisor = x86_hypervisor; 195 #ifdef LOADER_ZFS_SUPPORT 196 archsw.arch_zfs_probe = i386_zfs_probe; 197 198 /* 199 * zfsboot and gptzfsboot have always passed KARGS_FLAGS_ZFS, 200 * so if that is set along with KARGS_FLAGS_EXTARG we know we 201 * can interpret the extarg data as a struct zfs_boot_args. 202 */ 203 #define KARGS_EXTARGS_ZFS (KARGS_FLAGS_EXTARG | KARGS_FLAGS_ZFS) 204 205 if ((kargs->bootflags & KARGS_EXTARGS_ZFS) == KARGS_EXTARGS_ZFS) { 206 zargs = (struct zfs_boot_args *)(kargs + 1); 207 } 208 #endif /* LOADER_ZFS_SUPPORT */ 209 210 #ifdef LOADER_GELI_SUPPORT 211 /* 212 * If we decided earlier that we have zfs_boot_args extarg data, 213 * and it is big enough to contain the embedded geli data 214 * (the early zfs_boot_args structs weren't), then init the gbdata 215 * pointer accordingly. If there is extarg data which isn't 216 * zfs_boot_args data, determine whether it is geli_boot_args data. 217 * Recent versions of gptboot set KARGS_FLAGS_GELI to indicate that. 218 * Earlier versions didn't, but we presume that's what we 219 * have if the extarg size exactly matches the size of the 220 * geli_boot_args struct during that pre-flag era. 221 */ 222 #define LEGACY_GELI_ARGS_SIZE 260 /* This can never change */ 223 224 #ifdef LOADER_ZFS_SUPPORT 225 if (zargs != NULL) { 226 if (zargs->size > offsetof(struct zfs_boot_args, gelidata)) { 227 gbdata = &zargs->gelidata; 228 } 229 } else 230 #endif /* LOADER_ZFS_SUPPORT */ 231 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) { 232 gargs = (struct geli_boot_args *)(kargs + 1); 233 if ((kargs->bootflags & KARGS_FLAGS_GELI) || 234 gargs->size == LEGACY_GELI_ARGS_SIZE) { 235 gbdata = &gargs->gelidata; 236 } 237 } 238 239 if (gbdata != NULL) 240 import_geli_boot_data(gbdata); 241 #endif /* LOADER_GELI_SUPPORT */ 242 243 /* 244 * March through the device switch probing for things. 245 */ 246 for (i = 0; devsw[i] != NULL; i++) 247 if (devsw[i]->dv_init != NULL) 248 (devsw[i]->dv_init)(); 249 250 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, 251 bios_extmem / 1024); 252 if (initial_bootinfo != NULL) { 253 initial_bootinfo->bi_basemem = bios_basemem / 1024; 254 initial_bootinfo->bi_extmem = bios_extmem / 1024; 255 } 256 257 /* detect SMBIOS for future reference */ 258 smbios_detect(NULL); 259 260 /* detect PCI BIOS for future reference */ 261 biospci_detect(); 262 263 printf("\n%s", bootprog_info); 264 265 extract_currdev(); /* set $currdev and $loaddev */ 266 autoload_font(true); 267 268 bios_getsmap(); 269 270 interact(); 271 272 /* if we ever get here, it is an error */ 273 return (1); 274 } 275 276 /* 277 * Set the 'current device' by (if possible) recovering the boot device as 278 * supplied by the initial bootstrap. 279 * 280 * XXX should be extended for netbooting. 281 */ 282 static void 283 extract_currdev(void) 284 { 285 struct i386_devdesc new_currdev; 286 #ifdef LOADER_ZFS_SUPPORT 287 char buf[20]; 288 char *bootonce; 289 #endif 290 int biosdev = -1; 291 292 /* Assume we are booting from a BIOS disk by default */ 293 new_currdev.dd.d_dev = &bioshd; 294 295 /* new-style boot loaders such as pxeldr and cdldr */ 296 if (kargs->bootinfo == 0) { 297 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 298 /* we are booting from a CD with cdboot */ 299 new_currdev.dd.d_dev = &bioscd; 300 new_currdev.dd.d_unit = bd_bios2unit(initial_bootdev); 301 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 302 /* we are booting from pxeldr */ 303 new_currdev.dd.d_dev = &pxedisk; 304 new_currdev.dd.d_unit = 0; 305 } else { 306 /* we don't know what our boot device is */ 307 new_currdev.d_kind.biosdisk.slice = -1; 308 new_currdev.d_kind.biosdisk.partition = 0; 309 biosdev = -1; 310 } 311 #ifdef LOADER_ZFS_SUPPORT 312 } else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) { 313 /* 314 * zargs was set in main() if we have new style extended 315 * argument 316 */ 317 if (zargs != NULL && 318 zargs->size >= 319 offsetof(struct zfs_boot_args, primary_pool)) { 320 /* sufficient data is provided */ 321 new_currdev.d_kind.zfs.pool_guid = zargs->pool; 322 new_currdev.d_kind.zfs.root_guid = zargs->root; 323 if (zargs->size >= sizeof(*zargs) && 324 zargs->primary_vdev != 0) { 325 sprintf(buf, "%llu", zargs->primary_pool); 326 setenv("vfs.zfs.boot.primary_pool", buf, 1); 327 sprintf(buf, "%llu", zargs->primary_vdev); 328 setenv("vfs.zfs.boot.primary_vdev", buf, 1); 329 } 330 } else { 331 /* old style zfsboot block */ 332 new_currdev.d_kind.zfs.pool_guid = kargs->zfspool; 333 new_currdev.d_kind.zfs.root_guid = 0; 334 } 335 new_currdev.dd.d_dev = &zfs_dev; 336 337 if ((bootonce = malloc(VDEV_PAD_SIZE)) != NULL) { 338 if (zfs_get_bootonce(&new_currdev, OS_BOOTONCE_USED, 339 bootonce, VDEV_PAD_SIZE) == 0) { 340 setenv("zfs-bootonce", bootonce, 1); 341 } 342 free(bootonce); 343 (void) zfs_attach_nvstore(&new_currdev); 344 } 345 346 #endif 347 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 348 /* The passed-in boot device is bad */ 349 new_currdev.d_kind.biosdisk.slice = -1; 350 new_currdev.d_kind.biosdisk.partition = 0; 351 biosdev = -1; 352 } else { 353 new_currdev.d_kind.biosdisk.slice = 354 B_SLICE(initial_bootdev) - 1; 355 new_currdev.d_kind.biosdisk.partition = 356 B_PARTITION(initial_bootdev); 357 biosdev = initial_bootinfo->bi_bios_dev; 358 359 /* 360 * If we are booted by an old bootstrap, we have to guess at 361 * the BIOS unit number. We will lose if there is more than 362 * one disk type and we are not booting from the 363 * lowest-numbered disk type (ie. SCSI when IDE also exists). 364 */ 365 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) { 366 /* 367 * biosdev doesn't match major, assume harddisk 368 */ 369 biosdev = 0x80 + B_UNIT(initial_bootdev); 370 } 371 } 372 373 /* 374 * If we are booting off of a BIOS disk and we didn't succeed 375 * in determining which one we booted off of, just use disk0: 376 * as a reasonable default. 377 */ 378 if ((new_currdev.dd.d_dev->dv_type == bioshd.dv_type) && 379 ((new_currdev.dd.d_unit = bd_bios2unit(biosdev)) == -1)) { 380 printf("Can't work out which disk we are booting " 381 "from.\nGuessed BIOS device 0x%x not found by " 382 "probes, defaulting to disk0:\n", biosdev); 383 new_currdev.dd.d_unit = 0; 384 } 385 386 #ifdef LOADER_ZFS_SUPPORT 387 if (new_currdev.dd.d_dev->dv_type == DEVT_ZFS) 388 init_zfs_boot_options(zfs_fmtdev(&new_currdev)); 389 #endif 390 391 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 392 i386_setcurrdev, env_nounset); 393 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), 394 env_noset, env_nounset); 395 } 396 397 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 398 399 static int 400 command_reboot(int argc, char *argv[]) 401 { 402 int i; 403 404 for (i = 0; devsw[i] != NULL; ++i) 405 if (devsw[i]->dv_cleanup != NULL) 406 (devsw[i]->dv_cleanup)(); 407 408 printf("Rebooting...\n"); 409 delay(1000000); 410 __exit(0); 411 } 412 413 /* provide this for panic, as it's not in the startup code */ 414 void 415 exit(int code) 416 { 417 __exit(code); 418 } 419 420 COMMAND_SET(heap, "heap", "show heap usage", command_heap); 421 422 static int 423 command_heap(int argc, char *argv[]) 424 { 425 mallocstats(); 426 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 427 sbrk(0), heap_top); 428 return (CMD_OK); 429 } 430 431 /* ISA bus access functions for PnP. */ 432 static int 433 isa_inb(int port) 434 { 435 436 return (inb(port)); 437 } 438 439 static void 440 isa_outb(int port, int value) 441 { 442 443 outb(port, value); 444 } 445 446 #ifdef LOADER_ZFS_SUPPORT 447 static void 448 i386_zfs_probe(void) 449 { 450 char devname[32]; 451 struct i386_devdesc dev; 452 453 /* 454 * Open all the disks we can find and see if we can reconstruct 455 * ZFS pools from them. 456 */ 457 dev.dd.d_dev = &bioshd; 458 for (dev.dd.d_unit = 0; bd_unit2bios(&dev) >= 0; dev.dd.d_unit++) { 459 snprintf(devname, sizeof(devname), "%s%d:", bioshd.dv_name, 460 dev.dd.d_unit); 461 zfs_probe_dev(devname, NULL); 462 } 463 } 464 #endif 465