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/reboot.h> 42 43 #include "bootstrap.h" 44 #include "common/bootargs.h" 45 #include "libi386/libi386.h" 46 #include "libi386/smbios.h" 47 #include "btxv86.h" 48 49 #ifdef LOADER_ZFS_SUPPORT 50 #include "../zfs/libzfs.h" 51 #endif 52 53 CTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE); 54 CTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO); 55 CTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS); 56 CTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE); 57 58 /* Arguments passed in from the boot1/boot2 loader */ 59 static struct bootargs *kargs; 60 61 static u_int32_t initial_howto; 62 static u_int32_t initial_bootdev; 63 static struct bootinfo *initial_bootinfo; 64 65 struct arch_switch archsw; /* MI/MD interface boundary */ 66 67 static void extract_currdev(void); 68 static int isa_inb(int port); 69 static void isa_outb(int port, int value); 70 void exit(int code); 71 #ifdef LOADER_ZFS_SUPPORT 72 static void i386_zfs_probe(void); 73 #endif 74 75 /* from vers.c */ 76 extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[]; 77 78 /* XXX debugging */ 79 extern char end[]; 80 81 static void *heap_top; 82 static void *heap_bottom; 83 84 int 85 main(void) 86 { 87 int i; 88 89 /* Pick up arguments */ 90 kargs = (void *)__args; 91 initial_howto = kargs->howto; 92 initial_bootdev = kargs->bootdev; 93 initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 94 95 /* Initialize the v86 register set to a known-good state. */ 96 bzero(&v86, sizeof(v86)); 97 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 98 99 /* 100 * Initialise the heap as early as possible. Once this is done, malloc() is usable. 101 */ 102 bios_getmem(); 103 104 #if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \ 105 defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT) 106 if (high_heap_size > 0) { 107 heap_top = PTOV(high_heap_base + high_heap_size); 108 heap_bottom = PTOV(high_heap_base); 109 if (high_heap_base < memtop_copyin) 110 memtop_copyin = high_heap_base; 111 } else 112 #endif 113 { 114 heap_top = (void *)PTOV(bios_basemem); 115 heap_bottom = (void *)end; 116 } 117 setheap(heap_bottom, heap_top); 118 119 /* 120 * XXX Chicken-and-egg problem; we want to have console output early, but some 121 * console attributes may depend on reading from eg. the boot device, which we 122 * can't do yet. 123 * 124 * We can use printf() etc. once this is done. 125 * If the previous boot stage has requested a serial console, prefer that. 126 */ 127 bi_setboothowto(initial_howto); 128 if (initial_howto & RB_MULTIPLE) { 129 if (initial_howto & RB_SERIAL) 130 setenv("console", "ttya text", 1); 131 else 132 setenv("console", "text ttya", 1); 133 } else if (initial_howto & RB_SERIAL) 134 setenv("console", "ttya", 1); 135 else if (initial_howto & RB_MUTE) 136 setenv("console", "null", 1); 137 cons_probe(); 138 139 /* 140 * Initialise the block cache. Set the upper limit. 141 */ 142 bcache_init(32768, 512); 143 144 /* 145 * Special handling for PXE and CD booting. 146 */ 147 if (kargs->bootinfo == 0) { 148 /* 149 * We only want the PXE disk to try to init itself in the below 150 * walk through devsw if we actually booted off of PXE. 151 */ 152 if (kargs->bootflags & KARGS_FLAGS_PXE) 153 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 154 else if (kargs->bootflags & KARGS_FLAGS_CD) 155 bc_add(initial_bootdev); 156 } 157 158 archsw.arch_autoload = i386_autoload; 159 archsw.arch_getdev = i386_getdev; 160 archsw.arch_copyin = i386_copyin; 161 archsw.arch_copyout = i386_copyout; 162 archsw.arch_readin = i386_readin; 163 archsw.arch_isainb = isa_inb; 164 archsw.arch_isaoutb = isa_outb; 165 #ifdef LOADER_ZFS_SUPPORT 166 archsw.arch_zfs_probe = i386_zfs_probe; 167 #endif 168 169 /* 170 * March through the device switch probing for things. 171 */ 172 for (i = 0; devsw[i] != NULL; i++) 173 if (devsw[i]->dv_init != NULL) 174 (devsw[i]->dv_init)(); 175 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 176 if (initial_bootinfo != NULL) { 177 initial_bootinfo->bi_basemem = bios_basemem / 1024; 178 initial_bootinfo->bi_extmem = bios_extmem / 1024; 179 } 180 181 /* detect ACPI for future reference */ 182 biosacpi_detect(); 183 184 /* detect SMBIOS for future reference */ 185 smbios_detect(NULL); 186 187 /* detect PCI BIOS for future reference */ 188 biospci_detect(); 189 190 printf("\n"); 191 printf("%s, Revision %s\n", bootprog_name, bootprog_rev); 192 printf("(%s, %s)\n", bootprog_maker, bootprog_date); 193 194 extract_currdev(); /* set $currdev and $loaddev */ 195 setenv("LINES", "24", 1); /* optional */ 196 setenv("COLUMNS", "80", 1); /* optional */ 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 if (new_currdev.d_kind.biosdisk.partition == 0xff) 280 new_currdev.d_kind.biosdisk.partition = -1; 281 biosdev = initial_bootinfo->bi_bios_dev; 282 283 /* 284 * If we are booted by an old bootstrap, we have to guess at the BIOS 285 * unit number. We will lose if there is more than one disk type 286 * and we are not booting from the lowest-numbered disk type 287 * (ie. SCSI when IDE also exists). 288 */ 289 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 290 biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 291 } 292 new_currdev.d_type = new_currdev.d_dev->dv_type; 293 294 /* 295 * If we are booting off of a BIOS disk and we didn't succeed in determining 296 * which one we booted off of, just use disk0: as a reasonable default. 297 */ 298 if ((new_currdev.d_type == biosdisk.dv_type) && 299 ((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) { 300 printf("Can't work out which disk we are booting from.\n" 301 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 302 new_currdev.d_unit = 0; 303 } 304 305 #ifdef LOADER_ZFS_SUPPORT 306 #ifdef __FreeBSD__ 307 if (new_currdev.d_type == DEVT_ZFS) 308 init_zfs_bootenv(zfs_fmtdev(&new_currdev)); 309 #endif 310 #endif 311 312 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 313 i386_setcurrdev, env_nounset); 314 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 315 env_nounset); 316 } 317 318 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 319 320 static int 321 command_reboot(int argc, char *argv[]) 322 { 323 int i; 324 325 for (i = 0; devsw[i] != NULL; ++i) 326 if (devsw[i]->dv_cleanup != NULL) 327 (devsw[i]->dv_cleanup)(); 328 329 printf("Rebooting...\n"); 330 delay(1000000); 331 __exit(0); 332 } 333 334 /* provide this for panic, as it's not in the startup code */ 335 void 336 exit(int code) 337 { 338 __exit(code); 339 } 340 341 COMMAND_SET(heap, "heap", "show heap usage", command_heap); 342 343 static int 344 command_heap(int argc, char *argv[]) 345 { 346 mallocstats(); 347 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 348 sbrk(0), heap_top); 349 return(CMD_OK); 350 } 351 352 #ifdef LOADER_ZFS_SUPPORT 353 COMMAND_SET(lszfs, "lszfs", "list child datasets of a zfs dataset", 354 command_lszfs); 355 356 static int 357 command_lszfs(int argc, char *argv[]) 358 { 359 int err; 360 361 if (argc != 2) { 362 command_errmsg = "wrong number of arguments"; 363 return (CMD_ERROR); 364 } 365 366 err = zfs_list(argv[1]); 367 if (err != 0) { 368 command_errmsg = strerror(err); 369 return (CMD_ERROR); 370 } 371 372 return (CMD_OK); 373 } 374 375 #ifdef __FreeBSD__ 376 COMMAND_SET(reloadbe, "reloadbe", "refresh the list of ZFS Boot Environments", 377 command_reloadbe); 378 379 static int 380 command_reloadbe(int argc, char *argv[]) 381 { 382 int err; 383 char *root; 384 385 if (argc > 2) { 386 command_errmsg = "wrong number of arguments"; 387 return (CMD_ERROR); 388 } 389 390 if (argc == 2) { 391 err = zfs_bootenv(argv[1]); 392 } else { 393 root = getenv("zfs_be_root"); 394 if (root == NULL) { 395 /* There does not appear to be a ZFS pool here, exit without error */ 396 return (CMD_OK); 397 } 398 err = zfs_bootenv(getenv("zfs_be_root")); 399 } 400 401 if (err != 0) { 402 command_errmsg = strerror(err); 403 return (CMD_ERROR); 404 } 405 406 return (CMD_OK); 407 } 408 #endif /* __FreeBSD__ */ 409 #endif 410 411 /* ISA bus access functions for PnP. */ 412 static int 413 isa_inb(int port) 414 { 415 416 return (inb(port)); 417 } 418 419 static void 420 isa_outb(int port, int value) 421 { 422 423 outb(port, value); 424 } 425 426 #ifdef LOADER_ZFS_SUPPORT 427 static void 428 i386_zfs_probe(void) 429 { 430 char devname[32]; 431 int unit; 432 433 /* 434 * Open all the disks we can find and see if we can reconstruct 435 * ZFS pools from them. 436 */ 437 for (unit = 0; unit < MAXBDDEV; unit++) { 438 if (bd_unit2bios(unit) == -1) 439 break; 440 sprintf(devname, "disk%d:", unit); 441 zfs_probe_dev(devname, NULL); 442 } 443 } 444 #endif 445