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 "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_GELI_SUPPORT 74 #include "geliboot.h" 75 struct geli_boot_args *gargs; 76 #endif 77 #ifdef LOADER_ZFS_SUPPORT 78 struct zfs_boot_args *zargs; 79 static void i386_zfs_probe(void); 80 #endif 81 82 /* from vers.c */ 83 extern char bootprog_info[]; 84 85 /* XXX debugging */ 86 extern char end[]; 87 88 static void *heap_top; 89 static void *heap_bottom; 90 91 int 92 main(void) 93 { 94 int i; 95 96 /* Pick up arguments */ 97 kargs = (void *)__args; 98 initial_howto = kargs->howto; 99 initial_bootdev = kargs->bootdev; 100 initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 101 102 /* Initialize the v86 register set to a known-good state. */ 103 bzero(&v86, sizeof(v86)); 104 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 105 106 /* 107 * Initialise the heap as early as possible. Once this is done, malloc() is usable. 108 */ 109 bios_getmem(); 110 111 #if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \ 112 defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT) 113 if (high_heap_size > 0) { 114 heap_top = PTOV(high_heap_base + high_heap_size); 115 heap_bottom = PTOV(high_heap_base); 116 if (high_heap_base < memtop_copyin) 117 memtop_copyin = high_heap_base; 118 } else 119 #endif 120 { 121 heap_top = (void *)PTOV(bios_basemem); 122 heap_bottom = (void *)end; 123 } 124 setheap(heap_bottom, heap_top); 125 126 /* 127 * XXX Chicken-and-egg problem; we want to have console output early, but some 128 * console attributes may depend on reading from eg. the boot device, which we 129 * can't do yet. 130 * 131 * We can use printf() etc. once this is done. 132 * If the previous boot stage has requested a serial console, prefer that. 133 */ 134 bi_setboothowto(initial_howto); 135 if (initial_howto & RB_MULTIPLE) { 136 if (initial_howto & RB_SERIAL) 137 setenv("console", "comconsole vidconsole", 1); 138 else 139 setenv("console", "vidconsole comconsole", 1); 140 } else if (initial_howto & RB_SERIAL) 141 setenv("console", "comconsole", 1); 142 else if (initial_howto & RB_MUTE) 143 setenv("console", "nullconsole", 1); 144 cons_probe(); 145 146 /* 147 * Initialise the block cache. Set the upper limit. 148 */ 149 bcache_init(32768, 512); 150 151 /* 152 * Special handling for PXE and CD booting. 153 */ 154 if (kargs->bootinfo == 0) { 155 /* 156 * We only want the PXE disk to try to init itself in the below 157 * walk through devsw if we actually booted off of PXE. 158 */ 159 if (kargs->bootflags & KARGS_FLAGS_PXE) 160 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 161 else if (kargs->bootflags & KARGS_FLAGS_CD) 162 bc_add(initial_bootdev); 163 } 164 165 archsw.arch_autoload = i386_autoload; 166 archsw.arch_getdev = i386_getdev; 167 archsw.arch_copyin = i386_copyin; 168 archsw.arch_copyout = i386_copyout; 169 archsw.arch_readin = i386_readin; 170 archsw.arch_isainb = isa_inb; 171 archsw.arch_isaoutb = isa_outb; 172 #ifdef LOADER_ZFS_SUPPORT 173 archsw.arch_zfs_probe = i386_zfs_probe; 174 175 #ifdef LOADER_GELI_SUPPORT 176 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) { 177 zargs = (struct zfs_boot_args *)(kargs + 1); 178 if (zargs != NULL && zargs->size >= offsetof(struct zfs_boot_args, gelipw)) { 179 if (zargs->size >= offsetof(struct zfs_boot_args, keybuf_sentinel) && 180 zargs->keybuf_sentinel == KEYBUF_SENTINEL) { 181 geli_save_keybuf(zargs->keybuf); 182 } 183 if (zargs->gelipw[0] != '\0') { 184 setenv("kern.geom.eli.passphrase", zargs->gelipw, 1); 185 explicit_bzero(zargs->gelipw, sizeof(zargs->gelipw)); 186 } 187 } 188 } 189 #endif /* LOADER_GELI_SUPPORT */ 190 #else /* !LOADER_ZFS_SUPPORT */ 191 #ifdef LOADER_GELI_SUPPORT 192 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) { 193 gargs = (struct geli_boot_args *)(kargs + 1); 194 if (gargs != NULL && gargs->size >= offsetof(struct geli_boot_args, gelipw)) { 195 if (gargs->keybuf_sentinel == KEYBUF_SENTINEL) { 196 geli_save_keybuf(gargs->keybuf); 197 } 198 if (gargs->gelipw[0] != '\0') { 199 setenv("kern.geom.eli.passphrase", gargs->gelipw, 1); 200 explicit_bzero(gargs->gelipw, sizeof(gargs->gelipw)); 201 } 202 } 203 } 204 #endif /* LOADER_GELI_SUPPORT */ 205 #endif /* LOADER_ZFS_SUPPORT */ 206 207 /* 208 * March through the device switch probing for things. 209 */ 210 for (i = 0; devsw[i] != NULL; i++) 211 if (devsw[i]->dv_init != NULL) 212 (devsw[i]->dv_init)(); 213 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 214 if (initial_bootinfo != NULL) { 215 initial_bootinfo->bi_basemem = bios_basemem / 1024; 216 initial_bootinfo->bi_extmem = bios_extmem / 1024; 217 } 218 219 /* detect ACPI for future reference */ 220 biosacpi_detect(); 221 222 /* detect SMBIOS for future reference */ 223 smbios_detect(NULL); 224 225 /* detect PCI BIOS for future reference */ 226 biospci_detect(); 227 228 printf("\n%s", bootprog_info); 229 230 extract_currdev(); /* set $currdev and $loaddev */ 231 setenv("LINES", "24", 1); /* optional */ 232 233 bios_getsmap(); 234 235 interact(); 236 237 /* if we ever get here, it is an error */ 238 return (1); 239 } 240 241 /* 242 * Set the 'current device' by (if possible) recovering the boot device as 243 * supplied by the initial bootstrap. 244 * 245 * XXX should be extended for netbooting. 246 */ 247 static void 248 extract_currdev(void) 249 { 250 struct i386_devdesc new_currdev; 251 #ifdef LOADER_ZFS_SUPPORT 252 char buf[20]; 253 #endif 254 int biosdev = -1; 255 256 /* Assume we are booting from a BIOS disk by default */ 257 new_currdev.d_dev = &biosdisk; 258 259 /* new-style boot loaders such as pxeldr and cdldr */ 260 if (kargs->bootinfo == 0) { 261 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 262 /* we are booting from a CD with cdboot */ 263 new_currdev.d_dev = &bioscd; 264 new_currdev.d_unit = bc_bios2unit(initial_bootdev); 265 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 266 /* we are booting from pxeldr */ 267 new_currdev.d_dev = &pxedisk; 268 new_currdev.d_unit = 0; 269 } else { 270 /* we don't know what our boot device is */ 271 new_currdev.d_kind.biosdisk.slice = -1; 272 new_currdev.d_kind.biosdisk.partition = 0; 273 biosdev = -1; 274 } 275 #ifdef LOADER_ZFS_SUPPORT 276 } else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) { 277 zargs = NULL; 278 /* check for new style extended argument */ 279 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) 280 zargs = (struct zfs_boot_args *)(kargs + 1); 281 282 if (zargs != NULL && 283 zargs->size >= offsetof(struct zfs_boot_args, primary_pool)) { 284 /* sufficient data is provided */ 285 new_currdev.d_kind.zfs.pool_guid = zargs->pool; 286 new_currdev.d_kind.zfs.root_guid = zargs->root; 287 if (zargs->size >= sizeof(*zargs) && zargs->primary_vdev != 0) { 288 sprintf(buf, "%llu", zargs->primary_pool); 289 setenv("vfs.zfs.boot.primary_pool", buf, 1); 290 sprintf(buf, "%llu", zargs->primary_vdev); 291 setenv("vfs.zfs.boot.primary_vdev", buf, 1); 292 } 293 } else { 294 /* old style zfsboot block */ 295 new_currdev.d_kind.zfs.pool_guid = kargs->zfspool; 296 new_currdev.d_kind.zfs.root_guid = 0; 297 } 298 new_currdev.d_dev = &zfs_dev; 299 #endif 300 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 301 /* The passed-in boot device is bad */ 302 new_currdev.d_kind.biosdisk.slice = -1; 303 new_currdev.d_kind.biosdisk.partition = 0; 304 biosdev = -1; 305 } else { 306 new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 307 new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 308 biosdev = initial_bootinfo->bi_bios_dev; 309 310 /* 311 * If we are booted by an old bootstrap, we have to guess at the BIOS 312 * unit number. We will lose if there is more than one disk type 313 * and we are not booting from the lowest-numbered disk type 314 * (ie. SCSI when IDE also exists). 315 */ 316 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 317 biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 318 } 319 new_currdev.d_type = new_currdev.d_dev->dv_type; 320 321 /* 322 * If we are booting off of a BIOS disk and we didn't succeed in determining 323 * which one we booted off of, just use disk0: as a reasonable default. 324 */ 325 if ((new_currdev.d_type == biosdisk.dv_type) && 326 ((new_currdev.d_unit = bd_bios2unit(biosdev)) == -1)) { 327 printf("Can't work out which disk we are booting from.\n" 328 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 329 new_currdev.d_unit = 0; 330 } 331 332 #ifdef LOADER_ZFS_SUPPORT 333 if (new_currdev.d_type == DEVT_ZFS) 334 init_zfs_bootenv(zfs_fmtdev(&new_currdev)); 335 #endif 336 337 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 338 i386_setcurrdev, env_nounset); 339 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 340 env_nounset); 341 } 342 343 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 344 345 static int 346 command_reboot(int argc, char *argv[]) 347 { 348 int i; 349 350 for (i = 0; devsw[i] != NULL; ++i) 351 if (devsw[i]->dv_cleanup != NULL) 352 (devsw[i]->dv_cleanup)(); 353 354 printf("Rebooting...\n"); 355 delay(1000000); 356 __exit(0); 357 } 358 359 /* provide this for panic, as it's not in the startup code */ 360 void 361 exit(int code) 362 { 363 __exit(code); 364 } 365 366 COMMAND_SET(heap, "heap", "show heap usage", command_heap); 367 368 static int 369 command_heap(int argc, char *argv[]) 370 { 371 mallocstats(); 372 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 373 sbrk(0), heap_top); 374 return(CMD_OK); 375 } 376 377 /* ISA bus access functions for PnP. */ 378 static int 379 isa_inb(int port) 380 { 381 382 return (inb(port)); 383 } 384 385 static void 386 isa_outb(int port, int value) 387 { 388 389 outb(port, value); 390 } 391 392 #ifdef LOADER_ZFS_SUPPORT 393 static void 394 i386_zfs_probe(void) 395 { 396 char devname[32]; 397 int unit; 398 399 /* 400 * Open all the disks we can find and see if we can reconstruct 401 * ZFS pools from them. 402 */ 403 for (unit = 0; unit < MAXBDDEV; unit++) { 404 if (bd_unit2bios(unit) == -1) 405 break; 406 sprintf(devname, "disk%d:", unit); 407 zfs_probe_dev(devname, NULL); 408 } 409 } 410 #endif 411