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 <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 struct geli_boot_data *gbdata; 77 #endif 78 #ifdef LOADER_ZFS_SUPPORT 79 struct zfs_boot_args *zargs; 80 static void i386_zfs_probe(void); 81 #endif 82 83 /* XXX debugging */ 84 extern char end[]; 85 86 static void *heap_top; 87 static void *heap_bottom; 88 89 caddr_t 90 ptov(uintptr_t x) 91 { 92 return (PTOV(x)); 93 } 94 95 int 96 main(void) 97 { 98 int i; 99 100 /* Pick up arguments */ 101 kargs = (void *)__args; 102 initial_howto = kargs->howto; 103 initial_bootdev = kargs->bootdev; 104 initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 105 106 /* Initialize the v86 register set to a known-good state. */ 107 bzero(&v86, sizeof(v86)); 108 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 109 110 /* 111 * Initialise the heap as early as possible. Once this is done, malloc() is usable. 112 */ 113 bios_getmem(); 114 115 #if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \ 116 defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT) 117 if (high_heap_size > 0) { 118 heap_top = PTOV(high_heap_base + high_heap_size); 119 heap_bottom = PTOV(high_heap_base); 120 if (high_heap_base < memtop_copyin) 121 memtop_copyin = high_heap_base; 122 } else 123 #endif 124 { 125 heap_top = (void *)PTOV(bios_basemem); 126 heap_bottom = (void *)end; 127 } 128 setheap(heap_bottom, heap_top); 129 130 /* 131 * XXX Chicken-and-egg problem; we want to have console output early, but some 132 * console attributes may depend on reading from eg. the boot device, which we 133 * can't do yet. 134 * 135 * We can use printf() etc. once this is done. 136 * If the previous boot stage has requested a serial console, prefer that. 137 */ 138 bi_setboothowto(initial_howto); 139 if (initial_howto & RB_MULTIPLE) { 140 if (initial_howto & RB_SERIAL) 141 setenv("console", "comconsole vidconsole", 1); 142 else 143 setenv("console", "vidconsole comconsole", 1); 144 } else if (initial_howto & RB_SERIAL) 145 setenv("console", "comconsole", 1); 146 else if (initial_howto & RB_MUTE) 147 setenv("console", "nullconsole", 1); 148 cons_probe(); 149 150 /* 151 * Initialise the block cache. Set the upper limit. 152 */ 153 bcache_init(32768, 512); 154 155 /* 156 * Special handling for PXE and CD booting. 157 */ 158 if (kargs->bootinfo == 0) { 159 /* 160 * We only want the PXE disk to try to init itself in the below 161 * walk through devsw if we actually booted off of PXE. 162 */ 163 if (kargs->bootflags & KARGS_FLAGS_PXE) 164 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 165 else if (kargs->bootflags & KARGS_FLAGS_CD) 166 bc_add(initial_bootdev); 167 } 168 169 archsw.arch_autoload = i386_autoload; 170 archsw.arch_getdev = i386_getdev; 171 archsw.arch_copyin = i386_copyin; 172 archsw.arch_copyout = i386_copyout; 173 archsw.arch_readin = i386_readin; 174 archsw.arch_isainb = isa_inb; 175 archsw.arch_isaoutb = isa_outb; 176 archsw.arch_hypervisor = x86_hypervisor; 177 #ifdef LOADER_ZFS_SUPPORT 178 archsw.arch_zfs_probe = i386_zfs_probe; 179 180 /* 181 * zfsboot and gptzfsboot have always passed KARGS_FLAGS_ZFS, so if that is 182 * set along with KARGS_FLAGS_EXTARG we know we can interpret the extarg 183 * data as a struct zfs_boot_args. 184 */ 185 #define KARGS_EXTARGS_ZFS (KARGS_FLAGS_EXTARG | KARGS_FLAGS_ZFS) 186 187 if ((kargs->bootflags & KARGS_EXTARGS_ZFS) == KARGS_EXTARGS_ZFS) { 188 zargs = (struct zfs_boot_args *)(kargs + 1); 189 } 190 #endif /* LOADER_ZFS_SUPPORT */ 191 192 #ifdef LOADER_GELI_SUPPORT 193 /* 194 * If we decided earlier that we have zfs_boot_args extarg data, and it is 195 * big enough to contain the embedded geli data (the early zfs_boot_args 196 * structs weren't), then init the gbdata pointer accordingly. If there is 197 * extarg data which isn't zfs_boot_args data, determine whether it is 198 * geli_boot_args data. Recent versions of gptboot set KARGS_FLAGS_GELI to 199 * indicate that. Earlier versions didn't, but we presume that's what we 200 * have if the extarg size exactly matches the size of the geli_boot_args 201 * struct during that pre-flag era. 202 */ 203 #define LEGACY_GELI_ARGS_SIZE 260 /* This can never change */ 204 205 #ifdef LOADER_ZFS_SUPPORT 206 if (zargs != NULL) { 207 if (zargs->size > offsetof(struct zfs_boot_args, gelidata)) { 208 gbdata = &zargs->gelidata; 209 } 210 } else 211 #endif /* LOADER_ZFS_SUPPORT */ 212 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) { 213 gargs = (struct geli_boot_args *)(kargs + 1); 214 if ((kargs->bootflags & KARGS_FLAGS_GELI) || 215 gargs->size == LEGACY_GELI_ARGS_SIZE) { 216 gbdata = &gargs->gelidata; 217 } 218 } 219 220 if (gbdata != NULL) 221 import_geli_boot_data(gbdata); 222 #endif /* LOADER_GELI_SUPPORT */ 223 224 /* 225 * March through the device switch probing for things. 226 */ 227 for (i = 0; devsw[i] != NULL; i++) 228 if (devsw[i]->dv_init != NULL) 229 (devsw[i]->dv_init)(); 230 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 231 if (initial_bootinfo != NULL) { 232 initial_bootinfo->bi_basemem = bios_basemem / 1024; 233 initial_bootinfo->bi_extmem = bios_extmem / 1024; 234 } 235 236 /* detect ACPI for future reference */ 237 biosacpi_detect(); 238 239 /* detect SMBIOS for future reference */ 240 smbios_detect(NULL); 241 242 /* detect PCI BIOS for future reference */ 243 biospci_detect(); 244 245 printf("\n%s", bootprog_info); 246 247 extract_currdev(); /* set $currdev and $loaddev */ 248 249 bios_getsmap(); 250 251 interact(); 252 253 /* if we ever get here, it is an error */ 254 return (1); 255 } 256 257 /* 258 * Set the 'current device' by (if possible) recovering the boot device as 259 * supplied by the initial bootstrap. 260 * 261 * XXX should be extended for netbooting. 262 */ 263 static void 264 extract_currdev(void) 265 { 266 struct i386_devdesc new_currdev; 267 #ifdef LOADER_ZFS_SUPPORT 268 char buf[20]; 269 #endif 270 int biosdev = -1; 271 272 /* Assume we are booting from a BIOS disk by default */ 273 new_currdev.dd.d_dev = &bioshd; 274 275 /* new-style boot loaders such as pxeldr and cdldr */ 276 if (kargs->bootinfo == 0) { 277 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 278 /* we are booting from a CD with cdboot */ 279 new_currdev.dd.d_dev = &bioscd; 280 new_currdev.dd.d_unit = bd_bios2unit(initial_bootdev); 281 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 282 /* we are booting from pxeldr */ 283 new_currdev.dd.d_dev = &pxedisk; 284 new_currdev.dd.d_unit = 0; 285 } else { 286 /* we don't know what our boot device is */ 287 new_currdev.d_kind.biosdisk.slice = -1; 288 new_currdev.d_kind.biosdisk.partition = 0; 289 biosdev = -1; 290 } 291 #ifdef LOADER_ZFS_SUPPORT 292 } else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) { 293 /* zargs was set in main() if we have new style extended argument */ 294 if (zargs != NULL && 295 zargs->size >= offsetof(struct zfs_boot_args, primary_pool)) { 296 /* sufficient data is provided */ 297 new_currdev.d_kind.zfs.pool_guid = zargs->pool; 298 new_currdev.d_kind.zfs.root_guid = zargs->root; 299 if (zargs->size >= sizeof(*zargs) && zargs->primary_vdev != 0) { 300 sprintf(buf, "%llu", zargs->primary_pool); 301 setenv("vfs.zfs.boot.primary_pool", buf, 1); 302 sprintf(buf, "%llu", zargs->primary_vdev); 303 setenv("vfs.zfs.boot.primary_vdev", buf, 1); 304 } 305 } else { 306 /* old style zfsboot block */ 307 new_currdev.d_kind.zfs.pool_guid = kargs->zfspool; 308 new_currdev.d_kind.zfs.root_guid = 0; 309 } 310 new_currdev.dd.d_dev = &zfs_dev; 311 #endif 312 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 313 /* The passed-in boot device is bad */ 314 new_currdev.d_kind.biosdisk.slice = -1; 315 new_currdev.d_kind.biosdisk.partition = 0; 316 biosdev = -1; 317 } else { 318 new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 319 new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 320 biosdev = initial_bootinfo->bi_bios_dev; 321 322 /* 323 * If we are booted by an old bootstrap, we have to guess at the BIOS 324 * unit number. We will lose if there is more than one disk type 325 * and we are not booting from the lowest-numbered disk type 326 * (ie. SCSI when IDE also exists). 327 */ 328 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 329 biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 330 } 331 332 /* 333 * If we are booting off of a BIOS disk and we didn't succeed in determining 334 * which one we booted off of, just use disk0: as a reasonable default. 335 */ 336 if ((new_currdev.dd.d_dev->dv_type == bioshd.dv_type) && 337 ((new_currdev.dd.d_unit = bd_bios2unit(biosdev)) == -1)) { 338 printf("Can't work out which disk we are booting from.\n" 339 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 340 new_currdev.dd.d_unit = 0; 341 } 342 343 #ifdef LOADER_ZFS_SUPPORT 344 if (new_currdev.dd.d_dev->dv_type == DEVT_ZFS) 345 init_zfs_bootenv(zfs_fmtdev(&new_currdev)); 346 #endif 347 348 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 349 i386_setcurrdev, env_nounset); 350 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 351 env_nounset); 352 } 353 354 COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 355 356 static int 357 command_reboot(int argc, char *argv[]) 358 { 359 int i; 360 361 for (i = 0; devsw[i] != NULL; ++i) 362 if (devsw[i]->dv_cleanup != NULL) 363 (devsw[i]->dv_cleanup)(); 364 365 printf("Rebooting...\n"); 366 delay(1000000); 367 __exit(0); 368 } 369 370 /* provide this for panic, as it's not in the startup code */ 371 void 372 exit(int code) 373 { 374 __exit(code); 375 } 376 377 COMMAND_SET(heap, "heap", "show heap usage", command_heap); 378 379 static int 380 command_heap(int argc, char *argv[]) 381 { 382 mallocstats(); 383 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 384 sbrk(0), heap_top); 385 return(CMD_OK); 386 } 387 388 /* ISA bus access functions for PnP. */ 389 static int 390 isa_inb(int port) 391 { 392 393 return (inb(port)); 394 } 395 396 static void 397 isa_outb(int port, int value) 398 { 399 400 outb(port, value); 401 } 402 403 #ifdef LOADER_ZFS_SUPPORT 404 static void 405 i386_zfs_probe(void) 406 { 407 char devname[32]; 408 struct i386_devdesc dev; 409 410 /* 411 * Open all the disks we can find and see if we can reconstruct 412 * ZFS pools from them. 413 */ 414 dev.dd.d_dev = &bioshd; 415 for (dev.dd.d_unit = 0; bd_unit2bios(&dev) >= 0; dev.dd.d_unit++) { 416 snprintf(devname, sizeof(devname), "%s%d:", bioshd.dv_name, 417 dev.dd.d_unit); 418 zfs_probe_dev(devname, NULL); 419 } 420 } 421 #endif 422