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 55CTASSERT(sizeof(struct bootargs) == BOOTARGS_SIZE); 56CTASSERT(offsetof(struct bootargs, bootinfo) == BA_BOOTINFO); 57CTASSERT(offsetof(struct bootargs, bootflags) == BA_BOOTFLAGS); 58CTASSERT(offsetof(struct bootinfo, bi_size) == BI_SIZE); 59 60/* Arguments passed in from the boot1/boot2 loader */ 61static struct bootargs *kargs; 62 63static uint32_t initial_howto; 64static uint32_t initial_bootdev; 65static struct bootinfo *initial_bootinfo; 66 67struct arch_switch archsw; /* MI/MD interface boundary */ 68 69static void extract_currdev(void); 70static int isa_inb(int port); 71static void isa_outb(int port, int value); 72void exit(int code); 73#ifdef LOADER_GELI_SUPPORT 74#include "geliboot.h" 75struct geli_boot_args *gargs; 76struct geli_boot_data *gbdata; 77#endif 78#ifdef LOADER_ZFS_SUPPORT 79struct zfs_boot_args *zargs; 80static void i386_zfs_probe(void); 81#endif 82 83/* XXX debugging */ 84extern char end[]; 85 86static void *heap_top; 87static void *heap_bottom; 88 89int 90main(void) 91{ 92 int i; 93 94 /* Pick up arguments */ 95 kargs = (void *)__args; 96 initial_howto = kargs->howto; 97 initial_bootdev = kargs->bootdev; 98 initial_bootinfo = kargs->bootinfo ? (struct bootinfo *)PTOV(kargs->bootinfo) : NULL; 99 100 /* Initialize the v86 register set to a known-good state. */ 101 bzero(&v86, sizeof(v86)); 102 v86.efl = PSL_RESERVED_DEFAULT | PSL_I; 103 104 /* 105 * Initialise the heap as early as possible. Once this is done, malloc() is usable. 106 */ 107 bios_getmem(); 108 109#if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || \ 110 defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT) 111 if (high_heap_size > 0) { 112 heap_top = PTOV(high_heap_base + high_heap_size); 113 heap_bottom = PTOV(high_heap_base); 114 if (high_heap_base < memtop_copyin) 115 memtop_copyin = high_heap_base; 116 } else 117#endif 118 { 119 heap_top = (void *)PTOV(bios_basemem); 120 heap_bottom = (void *)end; 121 } 122 setheap(heap_bottom, heap_top); 123 124 /* 125 * XXX Chicken-and-egg problem; we want to have console output early, but some 126 * console attributes may depend on reading from eg. the boot device, which we 127 * can't do yet. 128 * 129 * We can use printf() etc. once this is done. 130 * If the previous boot stage has requested a serial console, prefer that. 131 */ 132 bi_setboothowto(initial_howto); 133 if (initial_howto & RB_MULTIPLE) { 134 if (initial_howto & RB_SERIAL) 135 setenv("console", "comconsole vidconsole", 1); 136 else 137 setenv("console", "vidconsole comconsole", 1); 138 } else if (initial_howto & RB_SERIAL) 139 setenv("console", "comconsole", 1); 140 else if (initial_howto & RB_MUTE) 141 setenv("console", "nullconsole", 1); 142 cons_probe(); 143 144 /* 145 * Initialise the block cache. Set the upper limit. 146 */ 147 bcache_init(32768, 512); 148 149 /* 150 * Special handling for PXE and CD booting. 151 */ 152 if (kargs->bootinfo == 0) { 153 /* 154 * We only want the PXE disk to try to init itself in the below 155 * walk through devsw if we actually booted off of PXE. 156 */ 157 if (kargs->bootflags & KARGS_FLAGS_PXE) 158 pxe_enable(kargs->pxeinfo ? PTOV(kargs->pxeinfo) : NULL); 159 else if (kargs->bootflags & KARGS_FLAGS_CD) 160 bc_add(initial_bootdev); 161 } 162 163 archsw.arch_autoload = i386_autoload; 164 archsw.arch_getdev = i386_getdev; 165 archsw.arch_copyin = i386_copyin; 166 archsw.arch_copyout = i386_copyout; 167 archsw.arch_readin = i386_readin; 168 archsw.arch_isainb = isa_inb; 169 archsw.arch_isaoutb = isa_outb; 170 archsw.arch_hypervisor = x86_hypervisor; 171#ifdef LOADER_ZFS_SUPPORT 172 archsw.arch_zfs_probe = i386_zfs_probe; 173 174 /* 175 * zfsboot and gptzfsboot have always passed KARGS_FLAGS_ZFS, so if that is 176 * set along with KARGS_FLAGS_EXTARG we know we can interpret the extarg 177 * data as a struct zfs_boot_args. 178 */ 179#define KARGS_EXTARGS_ZFS (KARGS_FLAGS_EXTARG | KARGS_FLAGS_ZFS) 180 181 if ((kargs->bootflags & KARGS_EXTARGS_ZFS) == KARGS_EXTARGS_ZFS) { 182 zargs = (struct zfs_boot_args *)(kargs + 1); 183 } 184#endif /* LOADER_ZFS_SUPPORT */ 185 186#ifdef LOADER_GELI_SUPPORT 187 /* 188 * If we decided earlier that we have zfs_boot_args extarg data, and it is 189 * big enough to contain the embedded geli data (the early zfs_boot_args 190 * structs weren't), then init the gbdata pointer accordingly. If there is 191 * extarg data which isn't zfs_boot_args data, determine whether it is 192 * geli_boot_args data. Recent versions of gptboot set KARGS_FLAGS_GELI to 193 * indicate that. Earlier versions didn't, but we presume that's what we 194 * have if the extarg size exactly matches the size of the geli_boot_args 195 * struct during that pre-flag era. 196 */ 197#define LEGACY_GELI_ARGS_SIZE 260 /* This can never change */ 198 199#ifdef LOADER_ZFS_SUPPORT 200 if (zargs != NULL) { 201 if (zargs->size > offsetof(struct zfs_boot_args, gelidata)) { 202 gbdata = &zargs->gelidata; 203 } 204 } else 205#endif /* LOADER_ZFS_SUPPORT */ 206 if ((kargs->bootflags & KARGS_FLAGS_EXTARG) != 0) { 207 gargs = (struct geli_boot_args *)(kargs + 1); 208 if ((kargs->bootflags & KARGS_FLAGS_GELI) || 209 gargs->size == LEGACY_GELI_ARGS_SIZE) { 210 gbdata = &gargs->gelidata; 211 } 212 } 213 214 if (gbdata != NULL) 215 import_geli_boot_data(gbdata); 216#endif /* LOADER_GELI_SUPPORT */ 217 218 /* 219 * March through the device switch probing for things. 220 */ 221 for (i = 0; devsw[i] != NULL; i++) 222 if (devsw[i]->dv_init != NULL) 223 (devsw[i]->dv_init)(); 224 printf("BIOS %dkB/%dkB available memory\n", bios_basemem / 1024, bios_extmem / 1024); 225 if (initial_bootinfo != NULL) { 226 initial_bootinfo->bi_basemem = bios_basemem / 1024; 227 initial_bootinfo->bi_extmem = bios_extmem / 1024; 228 } 229 230 /* detect ACPI for future reference */ 231 biosacpi_detect(); 232 233 /* detect SMBIOS for future reference */ 234 smbios_detect(NULL); 235 236 /* detect PCI BIOS for future reference */ 237 biospci_detect(); 238 239 printf("\n%s", bootprog_info); 240 241 extract_currdev(); /* set $currdev and $loaddev */ 242 setenv("LINES", "24", 1); /* optional */ 243 244 bios_getsmap(); 245 246 interact(); 247 248 /* if we ever get here, it is an error */ 249 return (1); 250} 251 252/* 253 * Set the 'current device' by (if possible) recovering the boot device as 254 * supplied by the initial bootstrap. 255 * 256 * XXX should be extended for netbooting. 257 */ 258static void 259extract_currdev(void) 260{ 261 struct i386_devdesc new_currdev; 262#ifdef LOADER_ZFS_SUPPORT 263 char buf[20]; 264#endif 265 int biosdev = -1; 266 267 /* Assume we are booting from a BIOS disk by default */ 268 new_currdev.dd.d_dev = &bioshd; 269 270 /* new-style boot loaders such as pxeldr and cdldr */ 271 if (kargs->bootinfo == 0) { 272 if ((kargs->bootflags & KARGS_FLAGS_CD) != 0) { 273 /* we are booting from a CD with cdboot */ 274 new_currdev.dd.d_dev = &bioscd; 275 new_currdev.dd.d_unit = bd_bios2unit(initial_bootdev); 276 } else if ((kargs->bootflags & KARGS_FLAGS_PXE) != 0) { 277 /* we are booting from pxeldr */ 278 new_currdev.dd.d_dev = &pxedisk; 279 new_currdev.dd.d_unit = 0; 280 } else { 281 /* we don't know what our boot device is */ 282 new_currdev.d_kind.biosdisk.slice = -1; 283 new_currdev.d_kind.biosdisk.partition = 0; 284 biosdev = -1; 285 } 286#ifdef LOADER_ZFS_SUPPORT 287 } else if ((kargs->bootflags & KARGS_FLAGS_ZFS) != 0) { 288 /* zargs was set in main() if we have new style extended argument */ 289 if (zargs != NULL && 290 zargs->size >= offsetof(struct zfs_boot_args, primary_pool)) { 291 /* sufficient data is provided */ 292 new_currdev.d_kind.zfs.pool_guid = zargs->pool; 293 new_currdev.d_kind.zfs.root_guid = zargs->root; 294 if (zargs->size >= sizeof(*zargs) && zargs->primary_vdev != 0) { 295 sprintf(buf, "%llu", zargs->primary_pool); 296 setenv("vfs.zfs.boot.primary_pool", buf, 1); 297 sprintf(buf, "%llu", zargs->primary_vdev); 298 setenv("vfs.zfs.boot.primary_vdev", buf, 1); 299 } 300 } else { 301 /* old style zfsboot block */ 302 new_currdev.d_kind.zfs.pool_guid = kargs->zfspool; 303 new_currdev.d_kind.zfs.root_guid = 0; 304 } 305 new_currdev.dd.d_dev = &zfs_dev; 306#endif 307 } else if ((initial_bootdev & B_MAGICMASK) != B_DEVMAGIC) { 308 /* The passed-in boot device is bad */ 309 new_currdev.d_kind.biosdisk.slice = -1; 310 new_currdev.d_kind.biosdisk.partition = 0; 311 biosdev = -1; 312 } else { 313 new_currdev.d_kind.biosdisk.slice = B_SLICE(initial_bootdev) - 1; 314 new_currdev.d_kind.biosdisk.partition = B_PARTITION(initial_bootdev); 315 biosdev = initial_bootinfo->bi_bios_dev; 316 317 /* 318 * If we are booted by an old bootstrap, we have to guess at the BIOS 319 * unit number. We will lose if there is more than one disk type 320 * and we are not booting from the lowest-numbered disk type 321 * (ie. SCSI when IDE also exists). 322 */ 323 if ((biosdev == 0) && (B_TYPE(initial_bootdev) != 2)) /* biosdev doesn't match major */ 324 biosdev = 0x80 + B_UNIT(initial_bootdev); /* assume harddisk */ 325 } 326 327 /* 328 * If we are booting off of a BIOS disk and we didn't succeed in determining 329 * which one we booted off of, just use disk0: as a reasonable default. 330 */ 331 if ((new_currdev.dd.d_dev->dv_type == bioshd.dv_type) && 332 ((new_currdev.dd.d_unit = bd_bios2unit(biosdev)) == -1)) { 333 printf("Can't work out which disk we are booting from.\n" 334 "Guessed BIOS device 0x%x not found by probes, defaulting to disk0:\n", biosdev); 335 new_currdev.dd.d_unit = 0; 336 } 337 338#ifdef LOADER_ZFS_SUPPORT 339 if (new_currdev.dd.d_dev->dv_type == DEVT_ZFS) 340 init_zfs_bootenv(zfs_fmtdev(&new_currdev)); 341#endif 342 343 env_setenv("currdev", EV_VOLATILE, i386_fmtdev(&new_currdev), 344 i386_setcurrdev, env_nounset); 345 env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, 346 env_nounset); 347} 348 349COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); 350 351static int 352command_reboot(int argc, char *argv[]) 353{ 354 int i; 355 356 for (i = 0; devsw[i] != NULL; ++i) 357 if (devsw[i]->dv_cleanup != NULL) 358 (devsw[i]->dv_cleanup)(); 359 360 printf("Rebooting...\n"); 361 delay(1000000); 362 __exit(0); 363} 364 365/* provide this for panic, as it's not in the startup code */ 366void 367exit(int code) 368{ 369 __exit(code); 370} 371 372COMMAND_SET(heap, "heap", "show heap usage", command_heap); 373 374static int 375command_heap(int argc, char *argv[]) 376{ 377 mallocstats(); 378 printf("heap base at %p, top at %p, upper limit at %p\n", heap_bottom, 379 sbrk(0), heap_top); 380 return(CMD_OK); 381} 382 383/* ISA bus access functions for PnP. */ 384static int 385isa_inb(int port) 386{ 387 388 return (inb(port)); 389} 390 391static void 392isa_outb(int port, int value) 393{ 394 395 outb(port, value); 396} 397 398#ifdef LOADER_ZFS_SUPPORT 399static void 400i386_zfs_probe(void) 401{ 402 char devname[32]; 403 struct i386_devdesc dev; 404 405 /* 406 * Open all the disks we can find and see if we can reconstruct 407 * ZFS pools from them. 408 */ 409 dev.dd.d_dev = &bioshd; 410 for (dev.dd.d_unit = 0; bd_unit2bios(&dev) >= 0; dev.dd.d_unit++) { 411 snprintf(devname, sizeof(devname), "%s%d:", bioshd.dv_name, 412 dev.dd.d_unit); 413 zfs_probe_dev(devname, NULL); 414 } 415} 416#endif 417