2 * Copyright (c) 1998 Robert Nordier
5 * Redistribution and use in source and binary forms are freely
6 * permitted provided that the above copyright notice and this
7 * paragraph and the following disclaimer are duplicated in all
10 * This software is provided "AS IS" and without any express or
11 * implied warranties, including, without limitation, the implied
12 * warranties of merchantability and fitness for a particular
16 #include <sys/cdefs.h>
17 __FBSDID("$FreeBSD$");
19 #include <sys/param.h>
21 #include <sys/dirent.h>
22 #include <sys/reboot.h>
24 #include <machine/bootinfo.h>
25 #include <machine/elf.h>
26 #include <machine/pc/bios.h>
27 #include <machine/psl.h>
56 #define TYPE_MAXHARD TYPE_DA
61 static const uuid_t freebsd_ufs_uuid = GPT_ENT_TYPE_FREEBSD_UFS;
62 static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */
63 static const unsigned char flags[NOPT] = {
81 static const char *const dev_nm[NDEV] = {"ad", "da", "fd"};
82 static const unsigned char dev_maj[NDEV] = {30, 4, 2};
84 static struct dsk dsk;
85 static char kname[1024];
86 static int comspeed = SIOSPD;
87 static struct bootinfo bootinfo;
88 #ifdef LOADER_GELI_SUPPORT
89 static struct geli_boot_args geliargs;
92 static vm_offset_t high_heap_base;
93 static uint32_t bios_basemem, bios_extmem, high_heap_size;
95 static struct bios_smap smap;
98 * The minimum amount of memory to reserve in bios_extmem for the heap.
100 #define HEAP_MIN (3 * 1024 * 1024)
102 static char *heap_next;
103 static char *heap_end;
105 static void load(void);
106 static int parse_cmds(char *, int *);
107 static int dskread(void *, daddr_t, unsigned);
108 #ifdef LOADER_GELI_SUPPORT
109 static int vdev_read(void *vdev __unused, void *priv, off_t off, void *buf,
115 #ifdef LOADER_GELI_SUPPORT
116 #include "geliboot.c"
117 static char gelipw[GELI_PW_MAXLEN];
118 static struct keybuf *gelibuf;
122 xfsread(ufs_ino_t inode, void *buf, size_t nbyte)
125 if ((size_t)fsread(inode, buf, nbyte) != nbyte) {
126 printf("Invalid %s\n", "format");
137 /* Parse system memory map */
141 v86.addr = MEM_EXT; /* int 0x15 function 0xe820*/
143 v86.ecx = sizeof(struct bios_smap);
145 v86.es = VTOPSEG(&smap);
146 v86.edi = VTOPOFF(&smap);
148 if ((v86.efl & 1) || (v86.eax != SMAP_SIG))
150 /* look for a low-memory segment that's large enough */
151 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) &&
152 (smap.length >= (512 * 1024)))
153 bios_basemem = smap.length;
154 /* look for the first segment in 'extended' memory */
155 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000)) {
156 bios_extmem = smap.length;
160 * Look for the largest segment in 'extended' memory beyond
163 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) &&
164 (smap.base < 0x100000000ull)) {
168 * If this segment crosses the 4GB boundary, truncate it.
170 if (smap.base + size > 0x100000000ull)
171 size = 0x100000000ull - smap.base;
173 if (size > high_heap_size) {
174 high_heap_size = size;
175 high_heap_base = smap.base;
178 } while (v86.ebx != 0);
180 /* Fall back to the old compatibility function for base memory */
181 if (bios_basemem == 0) {
183 v86.addr = 0x12; /* int 0x12 */
186 bios_basemem = (v86.eax & 0xffff) * 1024;
189 /* Fall back through several compatibility functions for extended memory */
190 if (bios_extmem == 0) {
192 v86.addr = 0x15; /* int 0x15 function 0xe801*/
195 if (!(v86.efl & 1)) {
196 bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024;
199 if (bios_extmem == 0) {
201 v86.addr = 0x15; /* int 0x15 function 0x88*/
204 bios_extmem = (v86.eax & 0xffff) * 1024;
208 * If we have extended memory and did not find a suitable heap
209 * region in the SMAP, use the last 3MB of 'extended' memory as a
210 * high heap candidate.
212 if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) {
213 high_heap_size = HEAP_MIN;
214 high_heap_base = bios_extmem + 0x100000 - HEAP_MIN;
222 if (gptread(&freebsd_ufs_uuid, &dsk, dmadat->secbuf) == -1) {
223 printf("%s: unable to load GPT\n", BOOTPROG);
226 if (gptfind(&freebsd_ufs_uuid, &dsk, dsk.part) == -1) {
227 printf("%s: no UFS partition was found\n", BOOTPROG);
230 #ifdef LOADER_GELI_SUPPORT
231 if (geli_taste(vdev_read, &dsk, (gpttable[curent].ent_lba_end -
232 gpttable[curent].ent_lba_start)) == 0) {
233 if (geli_havekey(&dsk) != 0 && geli_passphrase(gelipw,
234 dsk.unit, 'p', curent + 1, &dsk) != 0) {
235 printf("%s: unable to decrypt GELI key\n", BOOTPROG);
250 char cmd[512], cmdtmp[512];
252 int autoboot, dskupdated;
255 dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
259 if (high_heap_size > 0) {
260 heap_end = PTOV(high_heap_base + high_heap_size);
261 heap_next = PTOV(high_heap_base);
263 heap_next = (char *)dmadat + sizeof(*dmadat);
264 heap_end = (char *)PTOV(bios_basemem);
266 setheap(heap_next, heap_end);
269 v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
270 dsk.drive = *(uint8_t *)PTOV(ARGS);
271 dsk.type = dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD;
272 dsk.unit = dsk.drive & DRV_MASK;
275 bootinfo.bi_version = BOOTINFO_VERSION;
276 bootinfo.bi_size = sizeof(bootinfo);
277 bootinfo.bi_basemem = bios_basemem / 1024;
278 bootinfo.bi_extmem = bios_extmem / 1024;
279 bootinfo.bi_memsizes_valid++;
280 bootinfo.bi_bios_dev = dsk.drive;
282 #ifdef LOADER_GELI_SUPPORT
285 /* Process configuration file */
295 if ((ino = lookup(PATH_CONFIG)) ||
296 (ino = lookup(PATH_DOTCONFIG))) {
297 sz = fsread(ino, cmd, sizeof(cmd) - 1);
298 cmd[(sz < 0) ? 0 : sz] = '\0';
301 memcpy(cmdtmp, cmd, sizeof(cmdtmp));
302 if (parse_cmds(cmdtmp, &dskupdated))
304 if (dskupdated && gptinit() != 0)
306 if (!OPT_CHECK(RBX_QUIET))
307 printf("%s: %s", PATH_CONFIG, cmd);
311 if (autoboot && keyhit(3)) {
313 memcpy(kname, PATH_LOADER, sizeof(PATH_LOADER));
319 * Try to exec stage 3 boot loader. If interrupted by a
320 * keypress, or in case of failure, try to load a kernel
325 memcpy(kname, PATH_LOADER, sizeof(PATH_LOADER));
327 memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL));
330 if (gptfind(&freebsd_ufs_uuid, &dsk, -1) == -1)
335 /* Present the user with the boot2 prompt. */
338 if (!OPT_CHECK(RBX_QUIET)) {
339 printf("\nFreeBSD/x86 boot\n"
340 "Default: %u:%s(%up%u)%s\n"
342 dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit,
345 if (ioctrl & IO_SERIAL)
349 getstr(cmd, sizeof(cmd));
350 else if (!OPT_CHECK(RBX_QUIET))
352 if (parse_cmds(cmd, &dskupdated)) {
356 if (dskupdated && gptinit() != 0)
363 /* XXX - Needed for btxld to link the boot2 binary; do not remove. */
378 static Elf32_Phdr ep[2];
379 static Elf32_Shdr es[2];
385 if (!(ino = lookup(kname))) {
387 printf("%s: No %s on %u:%s(%up%u)\n", BOOTPROG,
388 kname, dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit,
393 if (xfsread(ino, &hdr, sizeof(hdr)))
395 if (N_GETMAGIC(hdr.ex) == ZMAGIC)
397 else if (IS_ELF(hdr.eh))
400 printf("Invalid %s\n", "format");
404 addr = hdr.ex.a_entry & 0xffffff;
407 if (xfsread(ino, p, hdr.ex.a_text))
409 p += roundup2(hdr.ex.a_text, PAGE_SIZE);
410 if (xfsread(ino, p, hdr.ex.a_data))
412 p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE);
413 bootinfo.bi_symtab = VTOP(p);
414 memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms));
415 p += sizeof(hdr.ex.a_syms);
417 if (xfsread(ino, p, hdr.ex.a_syms))
420 if (xfsread(ino, p, sizeof(int)))
425 if (xfsread(ino, p, x))
430 fs_off = hdr.eh.e_phoff;
431 for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) {
432 if (xfsread(ino, ep + j, sizeof(ep[0])))
434 if (ep[j].p_type == PT_LOAD)
437 for (i = 0; i < 2; i++) {
438 p = PTOV(ep[i].p_paddr & 0xffffff);
439 fs_off = ep[i].p_offset;
440 if (xfsread(ino, p, ep[i].p_filesz))
443 p += roundup2(ep[1].p_memsz, PAGE_SIZE);
444 bootinfo.bi_symtab = VTOP(p);
445 if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
446 fs_off = hdr.eh.e_shoff + sizeof(es[0]) *
447 (hdr.eh.e_shstrndx + 1);
448 if (xfsread(ino, &es, sizeof(es)))
450 for (i = 0; i < 2; i++) {
451 memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size));
452 p += sizeof(es[i].sh_size);
453 fs_off = es[i].sh_offset;
454 if (xfsread(ino, p, es[i].sh_size))
459 addr = hdr.eh.e_entry & 0xffffff;
461 bootinfo.bi_esymtab = VTOP(p);
462 bootinfo.bi_kernelname = VTOP(kname);
463 bootinfo.bi_bios_dev = dsk.drive;
464 #ifdef LOADER_GELI_SUPPORT
465 geliargs.size = sizeof(geliargs);
466 explicit_bzero(gelipw, sizeof(gelipw));
467 gelibuf = malloc(sizeof(struct keybuf) + (GELI_MAX_KEYS * sizeof(struct keybuf_ent)));
468 geli_fill_keybuf(gelibuf);
469 geliargs.notapw = '\0';
470 geliargs.keybuf_sentinel = KEYBUF_SENTINEL;
471 geliargs.keybuf = gelibuf;
473 __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
474 MAKEBOOTDEV(dev_maj[dsk.type], dsk.part + 1, dsk.unit, 0xff),
475 KARGS_FLAGS_EXTARG, 0, 0, VTOP(&bootinfo)
476 #ifdef LOADER_GELI_SUPPORT
483 parse_cmds(char *cmdstr, int *dskupdated)
492 while ((c = *arg++)) {
493 if (c == ' ' || c == '\t' || c == '\n')
495 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
500 while ((c = *arg++)) {
502 if (*(uint8_t *)PTOV(0x496) & 0x10) {
505 opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL);
508 printf("Keyboard: %s\n", cp);
510 } else if (c == 'S') {
512 while ((unsigned int)(i = *arg++ - '0') <= 9)
514 if (j > 0 && i == -'0') {
518 /* Fall through to error below ('S' not in optstr[]). */
520 for (i = 0; c != optstr[i]; i++)
523 opts ^= OPT_SET(flags[i]);
525 ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) :
526 OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD;
527 if (ioctrl & IO_SERIAL) {
528 if (sio_init(115200 / comspeed) != 0)
529 ioctrl &= ~IO_SERIAL;
532 for (q = arg--; *q && *q != '('; q++);
543 for (i = 0; arg[0] != dev_nm[i][0] ||
544 arg[1] != dev_nm[i][1]; i++)
549 dsk.unit = *arg - '0';
550 if (arg[1] != 'p' || dsk.unit > 9)
553 dsk.part = *arg - '0';
554 if (dsk.part < 1 || dsk.part > 9)
562 dsk.drive = (dsk.type <= TYPE_MAXHARD
563 ? DRV_HARD : 0) + drv;
566 if ((i = ep - arg)) {
567 if ((size_t)i >= sizeof(kname))
569 memcpy(kname, arg, i + 1);
578 dskread(void *buf, daddr_t lba, unsigned nblk)
582 err = drvread(&dsk, buf, lba + dsk.start, nblk);
584 #ifdef LOADER_GELI_SUPPORT
585 if (err == 0 && is_geli(&dsk) == 0) {
587 if (geli_read(&dsk, lba * DEV_BSIZE, buf, nblk * DEV_BSIZE))
595 #ifdef LOADER_GELI_SUPPORT
597 * Read function compartible with the ZFS callback, required to keep the GELI
598 * Implementation the same for both UFS and ZFS
601 vdev_read(void *vdev __unused, void *priv, off_t off, void *buf, size_t bytes)
606 struct dsk *dskp = (struct dsk *) priv;
608 if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1)))
612 lba = off / DEV_BSIZE;
616 nb = bytes / DEV_BSIZE;
617 if (nb > VBLKSIZE / DEV_BSIZE)
618 nb = VBLKSIZE / DEV_BSIZE;
619 if (drvread(dskp, dmadat->blkbuf, lba, nb))
621 memcpy(p, dmadat->blkbuf, nb * DEV_BSIZE);
624 bytes -= nb * DEV_BSIZE;
629 #endif /* LOADER_GELI_SUPPORT */