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>
20 #include <sys/disklabel.h>
21 #include <sys/diskmbr.h>
22 #include <sys/dirent.h>
23 #include <sys/reboot.h>
25 #include <machine/bootinfo.h>
26 #include <machine/elf.h>
37 /* Define to 0 to omit serial support */
46 #define DO_KBD (ioctrl & IO_KEYBOARD)
47 #define DO_SIO (ioctrl & IO_SERIAL)
53 #define SECOND 18 /* Circa that many ticks in a second. */
55 #define RBX_ASKNAME 0x0 /* -a */
56 #define RBX_SINGLE 0x1 /* -s */
57 /* 0x2 is reserved for log2(RB_NOSYNC). */
58 /* 0x3 is reserved for log2(RB_HALT). */
59 /* 0x4 is reserved for log2(RB_INITNAME). */
60 #define RBX_DFLTROOT 0x5 /* -r */
61 #define RBX_KDB 0x6 /* -d */
62 /* 0x7 is reserved for log2(RB_RDONLY). */
63 /* 0x8 is reserved for log2(RB_DUMP). */
64 /* 0x9 is reserved for log2(RB_MINIROOT). */
65 #define RBX_CONFIG 0xa /* -c */
66 #define RBX_VERBOSE 0xb /* -v */
67 #define RBX_SERIAL 0xc /* -h */
68 #define RBX_CDROM 0xd /* -C */
69 /* 0xe is reserved for log2(RB_POWEROFF). */
70 #define RBX_GDB 0xf /* -g */
71 #define RBX_MUTE 0x10 /* -m */
72 /* 0x11 is reserved for log2(RB_SELFTEST). */
73 /* 0x12 is reserved for boot programs. */
74 /* 0x13 is reserved for boot programs. */
75 #define RBX_PAUSE 0x14 /* -p */
76 #define RBX_QUIET 0x15 /* -q */
77 #define RBX_NOINTR 0x1c /* -n */
78 /* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
79 #define RBX_DUAL 0x1d /* -D */
80 /* 0x1f is reserved for log2(RB_BOOTINFO). */
82 /* pass: -a, -s, -r, -d, -c, -v, -h, -C, -g, -m, -p, -D */
83 #define RBX_MASK (OPT_SET(RBX_ASKNAME) | OPT_SET(RBX_SINGLE) | \
84 OPT_SET(RBX_DFLTROOT) | OPT_SET(RBX_KDB ) | \
85 OPT_SET(RBX_CONFIG) | OPT_SET(RBX_VERBOSE) | \
86 OPT_SET(RBX_SERIAL) | OPT_SET(RBX_CDROM) | \
87 OPT_SET(RBX_GDB ) | OPT_SET(RBX_MUTE) | \
88 OPT_SET(RBX_PAUSE) | OPT_SET(RBX_DUAL))
90 #define PATH_DOTCONFIG "/boot.config"
91 #define PATH_CONFIG "/boot/config"
92 #define PATH_BOOT3 "/boot/loader"
93 #define PATH_KERNEL "/boot/kernel/kernel"
101 #define DRV_HARD 0x80
102 #define DRV_MASK 0x7f
106 #define TYPE_MAXHARD TYPE_DA
109 #define OPT_SET(opt) (1 << (opt))
110 #define OPT_CHECK(opt) ((opts) & OPT_SET(opt))
112 extern uint32_t _end;
114 static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */
115 static const unsigned char flags[NOPT] = {
132 static const char *const dev_nm[NDEV] = {"ad", "da", "fd"};
133 static const unsigned char dev_maj[NDEV] = {30, 4, 2};
144 static char cmd[512], cmddup[512], knamebuf[1024];
145 static const char *kname;
146 static uint32_t opts;
147 static struct bootinfo bootinfo;
149 static int comspeed = SIOSPD;
150 static uint8_t ioctrl = IO_KEYBOARD;
154 static void load(void);
155 static int parse(void);
156 static int dskread(void *, unsigned, unsigned);
157 static void printf(const char *,...);
158 static void putchar(int);
159 static int drvread(void *, unsigned, unsigned);
160 static int keyhit(unsigned);
161 static int xputc(int);
162 static int xgetc(int);
163 static inline int getc(int);
165 static void memcpy(void *, const void *, int);
167 memcpy(void *dst, const void *src, int len)
177 strcmp(const char *s1, const char *s2)
179 for (; *s1 == *s2 && *s1; s1++, s2++);
180 return (unsigned char)*s1 - (unsigned char)*s2;
183 #define UFS_SMALL_CGBASE
187 xfsread(ufs_ino_t inode, void *buf, size_t nbyte)
189 if ((size_t)fsread(inode, buf, nbyte) != nbyte) {
190 printf("Invalid %s\n", "format");
204 switch (c = xgetc(0)) {
219 if (s - cmd < sizeof(cmd) - 1)
230 v86.eax = 0xe00 | (c & 0xff);
242 dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
244 v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
245 dsk.drive = *(uint8_t *)PTOV(ARGS);
246 dsk.type = dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD;
247 dsk.unit = dsk.drive & DRV_MASK;
248 dsk.slice = *(uint8_t *)PTOV(ARGS + 1) + 1;
249 bootinfo.bi_version = BOOTINFO_VERSION;
250 bootinfo.bi_size = sizeof(bootinfo);
252 /* Process configuration file */
256 if ((ino = lookup(PATH_CONFIG)) ||
257 (ino = lookup(PATH_DOTCONFIG))) {
258 nbyte = fsread(ino, cmd, sizeof(cmd) - 1);
263 memcpy(cmddup, cmd, sizeof(cmd));
266 if (!OPT_CHECK(RBX_QUIET))
267 printf("%s: %s", PATH_CONFIG, cmddup);
268 /* Do not process this command twice */
273 * Try to exec stage 3 boot loader. If interrupted by a keypress,
274 * or in case of failure, try to load a kernel directly instead.
279 if (autoboot && !keyhit(3*SECOND)) {
285 /* Present the user with the boot2 prompt. */
288 if (!autoboot || !OPT_CHECK(RBX_QUIET))
289 printf("\nFreeBSD/x86 boot\n"
290 "Default: %u:%s(%u,%c)%s\n"
292 dsk.drive & DRV_MASK, dev_nm[dsk.type], dsk.unit,
293 'a' + dsk.part, kname);
296 if (!autoboot || keyhit(3*SECOND))
298 else if (!autoboot || !OPT_CHECK(RBX_QUIET))
308 /* XXX - Needed for btxld to link the boot2 binary; do not remove. */
321 static Elf32_Phdr ep[2];
322 static Elf32_Shdr es[2];
328 if (!(ino = lookup(kname))) {
330 printf("No %s\n", kname);
333 if (xfsread(ino, &hdr, sizeof(hdr)))
336 if (N_GETMAGIC(hdr.ex) == ZMAGIC) {
337 addr = hdr.ex.a_entry & 0xffffff;
340 if (xfsread(ino, p, hdr.ex.a_text))
342 p += roundup2(hdr.ex.a_text, PAGE_SIZE);
343 if (xfsread(ino, p, hdr.ex.a_data))
345 } else if (IS_ELF(hdr.eh)) {
346 fs_off = hdr.eh.e_phoff;
347 for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) {
348 if (xfsread(ino, ep + j, sizeof(ep[0])))
350 if (ep[j].p_type == PT_LOAD)
353 for (i = 0; i < 2; i++) {
354 p = PTOV(ep[i].p_paddr & 0xffffff);
355 fs_off = ep[i].p_offset;
356 if (xfsread(ino, p, ep[i].p_filesz))
359 p += roundup2(ep[1].p_memsz, PAGE_SIZE);
360 bootinfo.bi_symtab = VTOP(p);
361 if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
362 fs_off = hdr.eh.e_shoff + sizeof(es[0]) *
363 (hdr.eh.e_shstrndx + 1);
364 if (xfsread(ino, &es, sizeof(es)))
366 for (i = 0; i < 2; i++) {
367 *(Elf32_Word *)p = es[i].sh_size;
368 p += sizeof(es[i].sh_size);
369 fs_off = es[i].sh_offset;
370 if (xfsread(ino, p, es[i].sh_size))
375 addr = hdr.eh.e_entry & 0xffffff;
376 bootinfo.bi_esymtab = VTOP(p);
378 printf("Invalid %s\n", "format");
382 bootinfo.bi_kernelname = VTOP(kname);
383 bootinfo.bi_bios_dev = dsk.drive;
384 __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
385 MAKEBOOTDEV(dev_maj[dsk.type], dsk.slice, dsk.unit, dsk.part),
386 0, 0, 0, VTOP(&bootinfo));
398 while ((c = *arg++)) {
399 if (c == ' ' || c == '\t' || c == '\n')
401 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
406 while ((c = *arg++)) {
408 if (*(uint8_t *)PTOV(0x496) & 0x10) {
411 opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL);
414 printf("Keyboard: %s\n", cp);
417 } else if (c == 'S') {
419 while ((unsigned int)(i = *arg++ - '0') <= 9)
421 if (j > 0 && i == -'0') {
425 /* Fall through to error below ('S' not in optstr[]). */
428 for (i = 0; c != optstr[i]; i++)
431 opts ^= OPT_SET(flags[i]);
434 ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) :
435 OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD;
437 if (sio_init(115200 / comspeed) != 0)
438 ioctrl &= ~IO_SERIAL;
442 for (q = arg--; *q && *q != '('; q++);
453 for (i = 0; arg[0] != dev_nm[i][0] ||
454 arg[1] != dev_nm[i][1]; i++)
459 dsk.unit = *arg - '0';
460 if (arg[1] != ',' || dsk.unit > 9)
463 dsk.slice = WHOLE_DISK_SLICE;
465 dsk.slice = *arg - '0' + 1;
466 if (dsk.slice > NDOSPART + 1)
472 dsk.part = *arg - 'a';
478 dsk.drive = (dsk.type <= TYPE_MAXHARD
479 ? DRV_HARD : 0) + drv;
482 if ((i = ep - arg)) {
483 if ((size_t)i >= sizeof(knamebuf))
485 memcpy(knamebuf, arg, i + 1);
495 dskread(void *buf, unsigned lba, unsigned nblk)
497 struct dos_partition *dp;
504 sec = dmadat->secbuf;
506 if (drvread(sec, DOSBBSECTOR, 1))
508 dp = (void *)(sec + DOSPARTOFF);
510 if (sl < BASE_SLICE) {
511 for (i = 0; i < NDOSPART; i++)
512 if (dp[i].dp_typ == DOSPTYP_386BSD &&
513 (dp[i].dp_flag & 0x80 || sl < BASE_SLICE)) {
515 if (dp[i].dp_flag & 0x80 ||
516 dsk.slice == COMPATIBILITY_SLICE)
519 if (dsk.slice == WHOLE_DISK_SLICE)
522 if (sl != WHOLE_DISK_SLICE) {
523 if (sl != COMPATIBILITY_SLICE)
524 dp += sl - BASE_SLICE;
525 if (dp->dp_typ != DOSPTYP_386BSD) {
526 printf("Invalid %s\n", "slice");
529 dsk.start = dp->dp_start;
531 if (drvread(sec, dsk.start + LABELSECTOR, 1))
533 d = (void *)(sec + LABELOFFSET);
534 if (d->d_magic != DISKMAGIC || d->d_magic2 != DISKMAGIC) {
535 if (dsk.part != RAW_PART) {
536 printf("Invalid %s\n", "label");
541 if (d->d_type == DTYPE_SCSI)
545 if (dsk.part >= d->d_npartitions ||
546 !d->d_partitions[dsk.part].p_size) {
547 printf("Invalid %s\n", "partition");
550 dsk.start += d->d_partitions[dsk.part].p_offset;
551 dsk.start -= d->d_partitions[RAW_PART].p_offset;
554 return drvread(buf, dsk.start + lba, nblk);
558 printf(const char *fmt,...)
567 while ((c = *fmt++)) {
572 putchar(va_arg(ap, int));
575 for (s = va_arg(ap, char *); *s; s++)
579 u = va_arg(ap, unsigned);
582 *s++ = '0' + u % 10U;
604 drvread(void *buf, unsigned lba, unsigned nblk)
606 static unsigned c = 0x2d5c7c2f;
608 if (!OPT_CHECK(RBX_QUIET))
609 printf("%c\b", c = c << 8 | c >> 24);
610 v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
611 v86.addr = XREADORG; /* call to xread in boot1 */
612 v86.es = VTOPSEG(buf);
614 v86.ebx = VTOPOFF(buf);
616 v86.edx = nblk << 8 | dsk.drive;
619 if (V86_CY(v86.efl)) {
620 printf("error %u lba %u\n", v86.eax >> 8 & 0xff, lba);
627 keyhit(unsigned ticks)
631 if (OPT_CHECK(RBX_NOINTR))
637 t1 = *(uint32_t *)PTOV(0x46c);
640 if ((uint32_t)(t1 - t0) >= ticks)
661 return fn == 0 ? v86.eax & 0xff : !V86_ZR(v86.efl);
667 if (OPT_CHECK(RBX_NOINTR))
670 if (DO_KBD && getc(1))
671 return fn ? 1 : getc(0);
672 if (DO_SIO && sio_ischar())
673 return fn ? 1 : sio_getc();