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 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 178 if (initial_bootinfo != NULL) { 179 initial_bootinfo->bi_basemem = bios_basemem / 1024; 180 initial_bootinfo->bi_extmem = bios_extmem / 1024; 181 } 182 183 /* detect ACPI for future reference */ 184 biosacpi_detect(); 185 186 /* detect SMBIOS for future reference */ 187 smbios_detect(NULL); 188 189 /* detect PCI BIOS for future reference */ 190 biospci_detect(); 191 192 printf("\n%s", bootprog_info); 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 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 453