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 #include <sys/multiboot2.h> 44 45 #include "bootstrap.h" 46 #include "common/bootargs.h" 47 #include "libi386/libi386.h" 48 #include "libi386/smbios.h" 49 #include "btxv86.h" 50 51 #ifdef LOADER_ZFS_SUPPORT 52 #include "../zfs/libzfs.h" 53 #endif 54 55 CTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE); 56 CTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO); 57 CTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS); 58 CTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE); 59 60 /* Arguments passed in from the boot1/boot2 loader */ 61 static struct bootargs *kargs; 62 63 static u_int32_t initial_howto; 64 static u_int32_t initial_bootdev; 65 static struct bootinfo *initial_bootinfo; 66 67 struct arch_switch archsw; /* MI/MD interface boundary */ 68 69 static void extract_currdev(void); 70 static int isa_inb(int port); 71 static void isa_outb(int port, int value); 72 void exit(int code); 73 #ifdef LOADER_ZFS_SUPPORT 74 static void i386_zfs_probe(void); 75 #endif 76 77 /* from vers.c */ 78 extern char bootprog_info[]; 79 80 /* XXX debugging */ 81 extern char end[]; 82 83 static void *heap_top; 84 static void *heap_bottom; 85 86 static uint64_t 87 i386_loadaddr(u_int type, void *data, uint64_t addr) 88 { 89 /* 90 * Our modules are page aligned. 91 */ 92 if (type == LOAD_RAW || type == LOAD_MEM) 93 return (roundup2(addr, MULTIBOOT_MOD_ALIGN)); 94 95 return (addr); 96 } 97 98 int 99 main(void) 100 { 101 int i; 102 103 /* Pick up arguments */ 104 kargs = (void *)__args; 105 initial_howto = kargs->howto; 106 initial_bootdev = kargs->bootdev; 107 initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 108 109 /* Initialize the v86 register set to a known-good state. */ 110 bzero(&v86, sizeof(v86)); 111 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 112 113 /* 114 * Initialise the heap as early as possible. 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 * XXX Chicken-and-egg problem; we want to have console output early, but some 135 * console attributes may depend on reading from eg. the boot device, which we 136 * can't do yet. 137 * 138 * We can use printf() etc. once this is done. 139 * If the previous boot stage has requested a serial console, prefer that. 140 */ 141 bi_setboothowto(initial_howto); 142 if (initial_howto & RB_MULTIPLE) { 143 if (initial_howto & RB_SERIAL) 144 setenv("console", "ttya text", 1); 145 else 146 setenv("console", "text ttya", 1); 147 } else if (initial_howto & RB_SERIAL) 148 setenv("console", "ttya", 1); 149 else if (initial_howto & RB_MUTE) 150 setenv("console", "null", 1); 151 cons_probe(); 152 153 /* 154 * Initialise the block cache. Set the upper limit. 155 */ 156 bcache_init(32768, 512); 157 158 /* 159 * Special handling for PXE and CD booting. 160 */ 161 if (kargs->bootinfo == 0) { 162 /* 163 * We only want the PXE disk to try to init itself in the below 164 * walk through devsw if we actually booted off of PXE. 165 */ 166 if (kargs->bootflags & KARGS_FLAGS_PXE) 167 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 168 else if (kargs->bootflags & KARGS_FLAGS_CD) 169 bc_add(initial_bootdev); 170 } 171 172 archsw.arch_autoload = i386_autoload; 173 archsw.arch_getdev = i386_getdev; 174 archsw.arch_copyin = i386_copyin; 175 archsw.arch_copyout = i386_copyout; 176 archsw.arch_readin = i386_readin; 177 archsw.arch_isainb = isa_inb; 178 archsw.arch_isaoutb = isa_outb; 179 archsw.arch_loadaddr = i386_loadaddr; 180 #ifdef LOADER_ZFS_SUPPORT 181 archsw.arch_zfs_probe = i386_zfs_probe; 182 #endif 183 184 /* 185 * March through the device switch probing for things. 186 */ 187 for (i = 0; devsw[i] != NULL; i++) 188 if (devsw[i]->dv_init != NULL) 189 (devsw[i]->dv_init)(); 190 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 191 if (initial_bootinfo != NULL) { 192 initial_bootinfo->bi_basemem = bios_basemem / 1024; 193 initial_bootinfo->bi_extmem = bios_extmem / 1024; 194 } 195 196 /* detect ACPI for future reference */ 197 biosacpi_detect(); 198 199 /* detect SMBIOS for future reference */ 200 smbios_detect(NULL); 201 202 /* detect PCI BIOS for future reference */ 203 biospci_detect(); 204 205 printf("\n%s", bootprog_info); 206 207 extract_currdev(); /* set $currdev and $loaddev */ 208 setenv("LINES", "24", 1); /* optional */ 209 setenv("COLUMNS", "80", 1); /* optional */ 210 211 if (bi_checkcpu()) 212 setenv("ISADIR", "amd64", 1); 213 else 214 setenv("ISADIR", "", 1); 215 216 bios_getsmap(); 217 218 interact(NULL); 219 220 /* if we ever get here, it is an error */ 221 return (1); 222 } 223 224 /* 225 * Set the 'current device' by (if possible) recovering the boot device as 226 * supplied by the initial bootstrap. 227 * 228 * XXX should be extended for netbooting. 229 */ 230 static void 231 extract_currdev(void) 232 { 233 struct i386_devdesc new_currdev; 234 #ifdef LOADER_ZFS_SUPPORT 235 char buf[20]; 236 struct zfs_boot_args *zargs; 237 #endif 238 int biosdev = -1; 239 240 /* Assume we are booting from a BIOS disk by default */ 241 new_currdev.d_dev = &biosdisk; 242 243 /* new-style boot loaders such as pxeldr and cdldr */ 244 if (kargs->bootinfo == 0) { 245 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 246 /* we are booting from a CD with cdboot */ 247 new_currdev.d_dev = &bioscd; 248 new_currdev.d_unit = bc_bios2unit(initial_bootdev); 249 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 250 /* we are booting from pxeldr */ 251 new_currdev.d_dev = &pxedisk; 252 new_currdev.d_unit = 0; 253 } else { 254 /* we don't know what our boot device is */ 255 new_currdev.d_kind.biosdisk.slice = -1; 256 new_currdev.d_kind.biosdisk.partition = 0; 257 biosdev = -1; 258 } 259 #ifdef LOADER_ZFS_SUPPORT 260 } else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) { 261 zargs = NULL; 262 /* check for new style extended argument */ 263 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) 264 zargs = (struct zfs_boot_args *)(kargs + 1); 265 266 if (zargs != NULL && 267 zargs->size >= offsetof(struct zfs_boot_args, primary_pool)) { 268 /* sufficient data is provided */ 269 new_currdev.d_kind.zfs.pool_guid = zargs->pool; 270 new_currdev.d_kind.zfs.root_guid = zargs->root; 271 if (zargs->size >= sizeof(*zargs) && zargs->primary_vdev != 0) { 272 sprintf(buf, "%llu", zargs->primary_pool); 273 setenv("vfs.zfs.boot.primary_pool", buf, 1); 274 sprintf(buf, "%llu", zargs->primary_vdev); 275 setenv("vfs.zfs.boot.primary_vdev", buf, 1); 276 } 277 } else { 278 /* old style zfsboot block */ 279 new_currdev.d_kind.zfs.pool_guid = kargs->zfspool; 280 new_currdev.d_kind.zfs.root_guid = 0; 281 } 282 new_currdev.d_dev = &zfs_dev; 283 #endif 284 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 285 /* The passed-in boot device is bad */ 286 new_currdev.d_kind.biosdisk.slice = -1; 287 new_currdev.d_kind.biosdisk.partition = 0; 288 biosdev = -1; 289 } else { 290 new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 291 new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 292 biosdev = initial_bootinfo->bi_bios_dev; 293 294 /* 295 * If we are booted by an old bootstrap, we have to guess at the BIOS 296 * unit number. We will lose if there is more than one disk type 297 * and we are not booting from the lowest-numbered disk type 298 * (ie. SCSI when IDE also exists). 299 */ 300 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 301 biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 302 } 303 new_currdev.d_type = new_currdev.d_dev->dv_type; 304 305 /* 306 * If we are booting off of a BIOS disk and we didn't succeed in determining 307 * which one we booted off of, just use disk0: as a reasonable default. 308 */ 309 if ((new_currdev.d_type == biosdisk.dv_type) && 310 ((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) { 311 printf("Can't work out which disk we are booting from.\n" 312 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 313 new_currdev.d_unit = 0; 314 } 315 316 #ifdef LOADER_ZFS_SUPPORT 317 #ifdef __FreeBSD__ 318 if (new_currdev.d_type == DEVT_ZFS) 319 init_zfs_bootenv(zfs_fmtdev(&new_currdev)); 320 #endif 321 #endif 322 323 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 324 i386_setcurrdev, env_nounset); 325 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 326 env_nounset); 327 } 328 329 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 330 331 static int 332 command_reboot(int argc, char *argv[]) 333 { 334 int i; 335 336 for (i = 0; devsw[i] != NULL; ++i) 337 if (devsw[i]->dv_cleanup != NULL) 338 (devsw[i]->dv_cleanup)(); 339 340 printf("Rebooting...\n"); 341 delay(1000000); 342 __exit(0); 343 } 344 345 /* provide this for panic, as it's not in the startup code */ 346 void 347 exit(int code) 348 { 349 __exit(code); 350 } 351 352 COMMAND_SET(heap, "heap", "show heap usage", command_heap); 353 354 static int 355 command_heap(int argc, char *argv[]) 356 { 357 mallocstats(); 358 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 359 sbrk(0), heap_top); 360 return(CMD_OK); 361 } 362 363 #ifdef LOADER_ZFS_SUPPORT 364 COMMAND_SET(lszfs, "lszfs", "list child datasets of a zfs dataset", 365 command_lszfs); 366 367 static int 368 command_lszfs(int argc, char *argv[]) 369 { 370 int err; 371 372 if (argc != 2) { 373 command_errmsg = "wrong number of arguments"; 374 return (CMD_ERROR); 375 } 376 377 err = zfs_list(argv[1]); 378 if (err != 0) { 379 command_errmsg = strerror(err); 380 return (CMD_ERROR); 381 } 382 383 return (CMD_OK); 384 } 385 386 #ifdef __FreeBSD__ 387 COMMAND_SET(reloadbe, "reloadbe", "refresh the list of ZFS Boot Environments", 388 command_reloadbe); 389 390 static int 391 command_reloadbe(int argc, char *argv[]) 392 { 393 int err; 394 char *root; 395 396 if (argc > 2) { 397 command_errmsg = "wrong number of arguments"; 398 return (CMD_ERROR); 399 } 400 401 if (argc == 2) { 402 err = zfs_bootenv(argv[1]); 403 } else { 404 root = getenv("zfs_be_root"); 405 if (root == NULL) { 406 /* There does not appear to be a ZFS pool here, exit without error */ 407 return (CMD_OK); 408 } 409 err = zfs_bootenv(getenv("zfs_be_root")); 410 } 411 412 if (err != 0) { 413 command_errmsg = strerror(err); 414 return (CMD_ERROR); 415 } 416 417 return (CMD_OK); 418 } 419 #endif /* __FreeBSD__ */ 420 #endif 421 422 /* ISA bus access functions for PnP. */ 423 static int 424 isa_inb(int port) 425 { 426 427 return (inb(port)); 428 } 429 430 static void 431 isa_outb(int port, int value) 432 { 433 434 outb(port, value); 435 } 436 437 #ifdef LOADER_ZFS_SUPPORT 438 static void 439 i386_zfs_probe(void) 440 { 441 char devname[32]; 442 int unit; 443 444 /* 445 * Open all the disks we can find and see if we can reconstruct 446 * ZFS pools from them. 447 */ 448 for (unit = 0; unit < MAXBDDEV; unit++) { 449 if (bd_unit2bios(unit) == -1) 450 break; 451 sprintf(devname, "disk%d:", unit); 452 zfs_probe_dev(devname, NULL); 453 } 454 } 455 456 uint64_t 457 ldi_get_size(void *priv) 458 { 459 int fd = (uintptr_t) priv; 460 uint64_t size; 461 462 ioctl(fd, DIOCGMEDIASIZE, &size); 463 return (size); 464 } 465 #endif 466