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 "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 uint32_t initial_howto; 64 static uint32_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 /* XXX debugging */ 83 extern char end[]; 84 85 static void *heap_top; 86 static void *heap_bottom; 87 88 int 89 main(void) 90 { 91 int i; 92 93 /* Pick up arguments */ 94 kargs = (void *)__args; 95 initial_howto = kargs->howto; 96 initial_bootdev = kargs->bootdev; 97 initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 98 99 /* Initialize the v86 register set to a known-good state. */ 100 bzero(&v86, sizeof(v86)); 101 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 102 103 /* 104 * Initialise the heap as early as possible. Once this is done, malloc() is usable. 105 */ 106 bios_getmem(); 107 108 #if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \ 109 defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT) 110 if (high_heap_size > 0) { 111 heap_top = PTOV(high_heap_base + high_heap_size); 112 heap_bottom = PTOV(high_heap_base); 113 if (high_heap_base < memtop_copyin) 114 memtop_copyin = high_heap_base; 115 } else 116 #endif 117 { 118 heap_top = (void *)PTOV(bios_basemem); 119 heap_bottom = (void *)end; 120 } 121 setheap(heap_bottom, heap_top); 122 123 /* 124 * XXX Chicken-and-egg problem; we want to have console output early, but some 125 * console attributes may depend on reading from eg. the boot device, which we 126 * can't do yet. 127 * 128 * We can use printf() etc. once this is done. 129 * If the previous boot stage has requested a serial console, prefer that. 130 */ 131 bi_setboothowto(initial_howto); 132 if (initial_howto & RB_MULTIPLE) { 133 if (initial_howto & RB_SERIAL) 134 setenv("console", "comconsole vidconsole", 1); 135 else 136 setenv("console", "vidconsole comconsole", 1); 137 } else if (initial_howto & RB_SERIAL) 138 setenv("console", "comconsole", 1); 139 else if (initial_howto & RB_MUTE) 140 setenv("console", "nullconsole", 1); 141 cons_probe(); 142 143 /* 144 * Initialise the block cache. Set the upper limit. 145 */ 146 bcache_init(32768, 512); 147 148 /* 149 * Special handling for PXE and CD booting. 150 */ 151 if (kargs->bootinfo == 0) { 152 /* 153 * We only want the PXE disk to try to init itself in the below 154 * walk through devsw if we actually booted off of PXE. 155 */ 156 if (kargs->bootflags & KARGS_FLAGS_PXE) 157 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 158 else if (kargs->bootflags & KARGS_FLAGS_CD) 159 bc_add(initial_bootdev); 160 } 161 162 archsw.arch_autoload = i386_autoload; 163 archsw.arch_getdev = i386_getdev; 164 archsw.arch_copyin = i386_copyin; 165 archsw.arch_copyout = i386_copyout; 166 archsw.arch_readin = i386_readin; 167 archsw.arch_isainb = isa_inb; 168 archsw.arch_isaoutb = isa_outb; 169 #ifdef LOADER_ZFS_SUPPORT 170 archsw.arch_zfs_probe = i386_zfs_probe; 171 172 #ifdef LOADER_GELI_SUPPORT 173 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) { 174 zargs = (struct zfs_boot_args *)(kargs + 1); 175 if (zargs != NULL && zargs->size >= offsetof(struct zfs_boot_args, gelipw)) { 176 if (zargs->size >= offsetof(struct zfs_boot_args, keybuf_sentinel) && 177 zargs->keybuf_sentinel == KEYBUF_SENTINEL) { 178 geli_import_key_buffer(zargs->keybuf); 179 } 180 if (zargs->gelipw[0] != '\0') { 181 setenv("kern.geom.eli.passphrase", zargs->gelipw, 1); 182 explicit_bzero(zargs->gelipw, sizeof(zargs->gelipw)); 183 } 184 } 185 } 186 #endif /* LOADER_GELI_SUPPORT */ 187 #else /* !LOADER_ZFS_SUPPORT */ 188 #ifdef LOADER_GELI_SUPPORT 189 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) { 190 gargs = (struct geli_boot_args *)(kargs + 1); 191 if (gargs != NULL && gargs->size >= offsetof(struct geli_boot_args, gelipw)) { 192 if (gargs->keybuf_sentinel == KEYBUF_SENTINEL) { 193 geli_import_key_buffer(gargs->keybuf); 194 } 195 if (gargs->gelipw[0] != '\0') { 196 setenv("kern.geom.eli.passphrase", gargs->gelipw, 1); 197 explicit_bzero(gargs->gelipw, sizeof(gargs->gelipw)); 198 } 199 } 200 } 201 #endif /* LOADER_GELI_SUPPORT */ 202 #endif /* LOADER_ZFS_SUPPORT */ 203 204 /* 205 * March through the device switch probing for things. 206 */ 207 for (i = 0; devsw[i] != NULL; i++) 208 if (devsw[i]->dv_init != NULL) 209 (devsw[i]->dv_init)(); 210 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 211 if (initial_bootinfo != NULL) { 212 initial_bootinfo->bi_basemem = bios_basemem / 1024; 213 initial_bootinfo->bi_extmem = bios_extmem / 1024; 214 } 215 216 /* detect ACPI for future reference */ 217 biosacpi_detect(); 218 219 /* detect SMBIOS for future reference */ 220 smbios_detect(NULL); 221 222 /* detect PCI BIOS for future reference */ 223 biospci_detect(); 224 225 printf("\n%s", bootprog_info); 226 227 extract_currdev(); /* set $currdev and $loaddev */ 228 setenv("LINES", "24", 1); /* optional */ 229 230 bios_getsmap(); 231 232 interact(); 233 234 /* if we ever get here, it is an error */ 235 return (1); 236 } 237 238 /* 239 * Set the 'current device' by (if possible) recovering the boot device as 240 * supplied by the initial bootstrap. 241 * 242 * XXX should be extended for netbooting. 243 */ 244 static void 245 extract_currdev(void) 246 { 247 struct i386_devdesc new_currdev; 248 #ifdef LOADER_ZFS_SUPPORT 249 char buf[20]; 250 #endif 251 int biosdev = -1; 252 253 /* Assume we are booting from a BIOS disk by default */ 254 new_currdev.dd.d_dev = &biosdisk; 255 256 /* new-style boot loaders such as pxeldr and cdldr */ 257 if (kargs->bootinfo == 0) { 258 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 259 /* we are booting from a CD with cdboot */ 260 new_currdev.dd.d_dev = &bioscd; 261 new_currdev.dd.d_unit = bc_bios2unit(initial_bootdev); 262 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 263 /* we are booting from pxeldr */ 264 new_currdev.dd.d_dev = &pxedisk; 265 new_currdev.dd.d_unit = 0; 266 } else { 267 /* we don't know what our boot device is */ 268 new_currdev.d_kind.biosdisk.slice = -1; 269 new_currdev.d_kind.biosdisk.partition = 0; 270 biosdev = -1; 271 } 272 #ifdef LOADER_ZFS_SUPPORT 273 } else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) { 274 zargs = NULL; 275 /* check for new style extended argument */ 276 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) 277 zargs = (struct zfs_boot_args *)(kargs + 1); 278 279 if (zargs != NULL && 280 zargs->size >= offsetof(struct zfs_boot_args, primary_pool)) { 281 /* sufficient data is provided */ 282 new_currdev.d_kind.zfs.pool_guid = zargs->pool; 283 new_currdev.d_kind.zfs.root_guid = zargs->root; 284 if (zargs->size >= sizeof(*zargs) && zargs->primary_vdev != 0) { 285 sprintf(buf, "%llu", zargs->primary_pool); 286 setenv("vfs.zfs.boot.primary_pool", buf, 1); 287 sprintf(buf, "%llu", zargs->primary_vdev); 288 setenv("vfs.zfs.boot.primary_vdev", buf, 1); 289 } 290 } else { 291 /* old style zfsboot block */ 292 new_currdev.d_kind.zfs.pool_guid = kargs->zfspool; 293 new_currdev.d_kind.zfs.root_guid = 0; 294 } 295 new_currdev.dd.d_dev = &zfs_dev; 296 #endif 297 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 298 /* The passed-in boot device is bad */ 299 new_currdev.d_kind.biosdisk.slice = -1; 300 new_currdev.d_kind.biosdisk.partition = 0; 301 biosdev = -1; 302 } else { 303 new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 304 new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 305 biosdev = initial_bootinfo->bi_bios_dev; 306 307 /* 308 * If we are booted by an old bootstrap, we have to guess at the BIOS 309 * unit number. We will lose if there is more than one disk type 310 * and we are not booting from the lowest-numbered disk type 311 * (ie. SCSI when IDE also exists). 312 */ 313 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 314 biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 315 } 316 317 /* 318 * If we are booting off of a BIOS disk and we didn't succeed in determining 319 * which one we booted off of, just use disk0: as a reasonable default. 320 */ 321 if ((new_currdev.dd.d_dev->dv_type == biosdisk.dv_type) && 322 ((new_currdev.dd.d_unit = bd_bios2unit(biosdev)) == -1)) { 323 printf("Can't work out which disk we are booting from.\n" 324 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 325 new_currdev.dd.d_unit = 0; 326 } 327 328 #ifdef LOADER_ZFS_SUPPORT 329 if (new_currdev.dd.d_dev->dv_type == DEVT_ZFS) 330 init_zfs_bootenv(zfs_fmtdev(&new_currdev)); 331 #endif 332 333 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 334 i386_setcurrdev, env_nounset); 335 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 336 env_nounset); 337 } 338 339 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 340 341 static int 342 command_reboot(int argc, char *argv[]) 343 { 344 int i; 345 346 for (i = 0; devsw[i] != NULL; ++i) 347 if (devsw[i]->dv_cleanup != NULL) 348 (devsw[i]->dv_cleanup)(); 349 350 printf("Rebooting...\n"); 351 delay(1000000); 352 __exit(0); 353 } 354 355 /* provide this for panic, as it's not in the startup code */ 356 void 357 exit(int code) 358 { 359 __exit(code); 360 } 361 362 COMMAND_SET(heap, "heap", "show heap usage", command_heap); 363 364 static int 365 command_heap(int argc, char *argv[]) 366 { 367 mallocstats(); 368 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 369 sbrk(0), heap_top); 370 return(CMD_OK); 371 } 372 373 /* ISA bus access functions for PnP. */ 374 static int 375 isa_inb(int port) 376 { 377 378 return (inb(port)); 379 } 380 381 static void 382 isa_outb(int port, int value) 383 { 384 385 outb(port, value); 386 } 387 388 #ifdef LOADER_ZFS_SUPPORT 389 static void 390 i386_zfs_probe(void) 391 { 392 char devname[32]; 393 int unit; 394 395 /* 396 * Open all the disks we can find and see if we can reconstruct 397 * ZFS pools from them. 398 */ 399 for (unit = 0; unit < MAXBDDEV; unit++) { 400 if (bd_unit2bios(unit) == -1) 401 break; 402 sprintf(devname, "disk%d:", unit); 403 zfs_probe_dev(devname, NULL); 404 } 405 } 406 #endif 407