2 * Copyright (c) 2008-2009 TAKAHASHI Yoshihiro
3 * Copyright (c) 1998 Robert Nordier
6 * Redistribution and use in source and binary forms are freely
7 * permitted provided that the above copyright notice and this
8 * paragraph and the following disclaimer are duplicated in all
11 * This software is provided "AS IS" and without any express or
12 * implied warranties, including, without limitation, the implied
13 * warranties of merchantability and fitness for a particular
17 #include <sys/cdefs.h>
18 __FBSDID("$FreeBSD$");
20 #include <sys/param.h>
21 #include <sys/disklabel.h>
22 #include <sys/diskpc98.h>
23 #include <sys/dirent.h>
24 #include <sys/reboot.h>
26 #include <machine/bootinfo.h>
27 #include <machine/cpufunc.h>
28 #include <machine/elf.h>
29 #include <machine/psl.h>
43 #define SECOND 1 /* Circa that many ticks in a second. */
45 #define RBX_ASKNAME 0x0 /* -a */
46 #define RBX_SINGLE 0x1 /* -s */
47 /* 0x2 is reserved for log2(RB_NOSYNC). */
48 /* 0x3 is reserved for log2(RB_HALT). */
49 /* 0x4 is reserved for log2(RB_INITNAME). */
50 #define RBX_DFLTROOT 0x5 /* -r */
51 #define RBX_KDB 0x6 /* -d */
52 /* 0x7 is reserved for log2(RB_RDONLY). */
53 /* 0x8 is reserved for log2(RB_DUMP). */
54 /* 0x9 is reserved for log2(RB_MINIROOT). */
55 #define RBX_CONFIG 0xa /* -c */
56 #define RBX_VERBOSE 0xb /* -v */
57 #define RBX_SERIAL 0xc /* -h */
58 #define RBX_CDROM 0xd /* -C */
59 /* 0xe is reserved for log2(RB_POWEROFF). */
60 #define RBX_GDB 0xf /* -g */
61 #define RBX_MUTE 0x10 /* -m */
62 /* 0x11 is reserved for log2(RB_SELFTEST). */
63 /* 0x12 is reserved for boot programs. */
64 /* 0x13 is reserved for boot programs. */
65 #define RBX_PAUSE 0x14 /* -p */
66 #define RBX_QUIET 0x15 /* -q */
67 #define RBX_NOINTR 0x1c /* -n */
68 /* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
69 #define RBX_DUAL 0x1d /* -D */
70 /* 0x1f is reserved for log2(RB_BOOTINFO). */
72 /* pass: -a, -s, -r, -d, -c, -v, -h, -C, -g, -m, -p, -D */
73 #define RBX_MASK (OPT_SET(RBX_ASKNAME) | OPT_SET(RBX_SINGLE) | \
74 OPT_SET(RBX_DFLTROOT) | OPT_SET(RBX_KDB ) | \
75 OPT_SET(RBX_CONFIG) | OPT_SET(RBX_VERBOSE) | \
76 OPT_SET(RBX_SERIAL) | OPT_SET(RBX_CDROM) | \
77 OPT_SET(RBX_GDB ) | OPT_SET(RBX_MUTE) | \
78 OPT_SET(RBX_PAUSE) | OPT_SET(RBX_DUAL))
80 #define PATH_CONFIG "/boot.config"
81 #define PATH_BOOT3 "/boot/loader"
82 #define PATH_KERNEL "/boot/kernel/kernel"
87 #define V86_CY(x) ((x) & PSL_C)
88 #define V86_ZR(x) ((x) & PSL_Z)
97 #define OPT_SET(opt) (1 << (opt))
98 #define OPT_CHECK(opt) ((opts) & OPT_SET(opt))
100 extern uint32_t _end;
102 static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */
103 static const unsigned char flags[NOPT] = {
120 static const char *const dev_nm[NDEV] = {"ad", "da", "fd"};
121 static const unsigned char dev_maj[NDEV] = {30, 4, 2};
122 static const unsigned char dev_daua[NDEV] = {0x80, 0xa0, 0x90};
135 static char cmd[512], cmddup[512];
136 static const char *kname = NULL;
137 static uint32_t opts;
138 static int comspeed = SIOSPD;
139 static struct bootinfo bootinfo;
140 static uint8_t ioctrl = IO_KEYBOARD;
143 static void load(void);
144 static int parse(void);
145 static int xfsread(ino_t, void *, size_t);
146 static int dskread(void *, unsigned, unsigned);
147 static void printf(const char *,...);
148 static void putchar(int);
149 static int drvread(void *, unsigned);
150 static int keyhit(unsigned);
151 static int xputc(int);
152 static int xgetc(int);
153 static inline int getc(int);
155 static void memcpy(void *, const void *, int);
157 memcpy(void *dst, const void *src, int len)
167 strcmp(const char *s1, const char *s2)
169 for (; *s1 == *s2 && *s1; s1++, s2++);
170 return (unsigned char)*s1 - (unsigned char)*s2;
173 #define UFS_SMALL_CGBASE
177 xfsread(ino_t inode, void *buf, size_t nbyte)
179 if ((size_t)fsread(inode, buf, nbyte) != nbyte) {
180 printf("Invalid %s\n", "format");
194 switch (c = xgetc(0)) {
209 if (s - cmd < sizeof(cmd) - 1)
220 v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
221 v86.addr = PUTCORG; /* call to putc in boot1 */
231 if ((*(u_char *)PTOV(0x482) >> dsk.unit) & 0x01)
238 fix_sector_size(void)
242 p = (u_char *)PTOV(0x460 + dsk.unit * 4); /* SCSI equipment parameter */
244 if ((p[0] & 0x1f) == 7) { /* SCSI MO */
245 if (!(p[3] & 0x30)) { /* 256B / sector */
246 p[3] |= 0x10; /* forced set 512B / sector */
247 p[3 + 0xa1000] |= 0x10;
252 static inline uint32_t
256 if (dsk.disk == 0x30) { /* 1440KB FD */
257 /* 80 cylinders, 2 heads, 18 sectors */
258 return (80 << 16) | (2 << 8) | 18;
259 } else if (dsk.disk == 0x90) { /* 1200KB FD */
260 /* 80 cylinders, 2 heads, 15 sectors */
261 return (80 << 16) | (2 << 8) | 15;
262 } else if (dsk.disk == 0x80 || is_scsi_hd()) { /* IDE or SCSI HDD */
264 v86.eax = 0x8400 | dsk.daua;
266 return (v86.ecx << 16) | v86.edx;
270 fix_sector_size(); /* SCSI MO */
272 /* other SCSI devices */
273 return (65535 << 16) | (8 << 8) | 32;
283 dsk.head = (di >> 8) & 0xff;
290 bd_getbigeom(int bunit)
293 int unit = 0x80; /* IDE HDD */
296 while (unit < 0xa7) {
297 if (*(u_char *)PTOV(addr) & (1 << (unit & 0x0f)))
302 int media = ((unsigned *)PTOV(0x460))[unit & 0x0F] & 0x1F;
304 if (media == 7 && hds++ == bunit) /* SCSI MO */
305 return(0xFFFE0820); /* C:65535 H:8 S:32 */
307 if (++unit == 0x84) {
308 unit = 0xA0; /* SCSI HDD */
313 return 0x4F020F; /* 1200KB FD C:80 H:2 S:15 */
315 v86.eax = 0x8400 | unit;
318 return 0x4F020F; /* 1200KB FD C:80 H:2 S:15 */
319 return ((v86.ecx & 0xffff) << 16) | (v86.edx & 0xffff);
326 struct pc98_partition *dp;
330 sec = dmadat->secbuf;
331 cyl = *(uint16_t *)PTOV(ARGS);
334 if (dsk.type == TYPE_FD)
335 return (WHOLE_DISK_SLICE);
336 if (drvread(sec, DOSBBSECTOR + 1))
337 return (WHOLE_DISK_SLICE); /* Read error */
338 dp = (void *)(sec + DOSPARTOFF);
339 for (i = 0; i < NDOSPART; i++) {
340 if (dp[i].dp_mid == DOSMID_386BSD) {
341 if (dp[i].dp_scyl <= cyl && cyl <= dp[i].dp_ecyl)
342 return (BASE_SLICE + i);
346 return (WHOLE_DISK_SLICE);
358 dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
360 v86.efl = PSL_RESERVED_DEFAULT | PSL_I;
361 dsk.daua = *(uint8_t *)PTOV(0x584);
362 dsk.disk = dsk.daua & DRV_DISK;
363 dsk.unit = dsk.daua & DRV_UNIT;
364 if (dsk.disk == 0x80)
366 else if (dsk.disk == 0xa0)
368 else /* if (dsk.disk == 0x30 || dsk.disk == 0x90) */
370 dsk.slice = check_slice();
372 for (i = 0; i < N_BIOS_GEOM; i++)
373 bootinfo.bi_bios_geom[i] = bd_getbigeom(i);
375 bootinfo.bi_version = BOOTINFO_VERSION;
376 bootinfo.bi_size = sizeof(bootinfo);
378 /* Process configuration file */
382 if ((ino = lookup(PATH_CONFIG)))
383 fsread(ino, cmd, sizeof(cmd));
386 memcpy(cmddup, cmd, sizeof(cmd));
389 if (!OPT_CHECK(RBX_QUIET))
390 printf("%s: %s", PATH_CONFIG, cmddup);
391 /* Do not process this command twice */
396 * Try to exec stage 3 boot loader. If interrupted by a keypress,
397 * or in case of failure, try to load a kernel directly instead.
400 if (autoboot && !kname) {
402 if (!keyhit(3*SECOND)) {
408 /* Present the user with the boot2 prompt. */
411 if (!autoboot || !OPT_CHECK(RBX_QUIET))
412 printf("\nFreeBSD/pc98 boot\n"
413 "Default: %u:%s(%u,%c)%s\n"
415 dsk.unit, dev_nm[dsk.type], dsk.unit,
416 'a' + dsk.part, kname);
417 if (ioctrl & IO_SERIAL)
419 if (!autoboot || keyhit(3*SECOND))
421 else if (!autoboot || !OPT_CHECK(RBX_QUIET))
431 /* XXX - Needed for btxld to link the boot2 binary; do not remove. */
444 static Elf32_Phdr ep[2];
445 static Elf32_Shdr es[2];
451 if (!(ino = lookup(kname))) {
453 printf("No %s\n", kname);
456 if (xfsread(ino, &hdr, sizeof(hdr)))
459 if (N_GETMAGIC(hdr.ex) == ZMAGIC) {
460 addr = hdr.ex.a_entry & 0xffffff;
463 if (xfsread(ino, p, hdr.ex.a_text))
465 p += roundup2(hdr.ex.a_text, PAGE_SIZE);
466 if (xfsread(ino, p, hdr.ex.a_data))
468 } else if (IS_ELF(hdr.eh)) {
469 fs_off = hdr.eh.e_phoff;
470 for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) {
471 if (xfsread(ino, ep + j, sizeof(ep[0])))
473 if (ep[j].p_type == PT_LOAD)
476 for (i = 0; i < 2; i++) {
477 p = PTOV(ep[i].p_paddr & 0xffffff);
478 fs_off = ep[i].p_offset;
479 if (xfsread(ino, p, ep[i].p_filesz))
482 p += roundup2(ep[1].p_memsz, PAGE_SIZE);
483 bootinfo.bi_symtab = VTOP(p);
484 if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
485 fs_off = hdr.eh.e_shoff + sizeof(es[0]) *
486 (hdr.eh.e_shstrndx + 1);
487 if (xfsread(ino, &es, sizeof(es)))
489 for (i = 0; i < 2; i++) {
490 *(Elf32_Word *)p = es[i].sh_size;
491 p += sizeof(es[i].sh_size);
492 fs_off = es[i].sh_offset;
493 if (xfsread(ino, p, es[i].sh_size))
498 addr = hdr.eh.e_entry & 0xffffff;
499 bootinfo.bi_esymtab = VTOP(p);
501 printf("Invalid %s\n", "format");
505 bootinfo.bi_kernelname = VTOP(kname);
506 bootinfo.bi_bios_dev = dsk.daua;
507 __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
508 MAKEBOOTDEV(dev_maj[dsk.type], dsk.slice, dsk.unit, dsk.part),
509 0, 0, 0, VTOP(&bootinfo));
521 while ((c = *arg++)) {
522 if (c == ' ' || c == '\t' || c == '\n')
524 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
529 while ((c = *arg++)) {
531 if (*(uint8_t *)PTOV(0x481) & 0x48) {
534 opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL);
537 printf("Keyboard: %s\n", cp);
539 } else if (c == 'S') {
541 while ((unsigned int)(i = *arg++ - '0') <= 9)
543 if (j > 0 && i == -'0') {
547 /* Fall through to error below ('S' not in optstr[]). */
549 for (i = 0; c != optstr[i]; i++)
552 opts ^= OPT_SET(flags[i]);
554 ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) :
555 OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD;
556 if (ioctrl & IO_SERIAL)
557 sio_init(115200 / comspeed);
559 for (q = arg--; *q && *q != '('; q++);
570 for (i = 0; arg[0] != dev_nm[i][0] ||
571 arg[1] != dev_nm[i][1]; i++)
576 dsk.unit = *arg - '0';
577 if (arg[1] != ',' || dsk.unit > 9)
580 dsk.slice = WHOLE_DISK_SLICE;
582 dsk.slice = *arg - '0' + 1;
583 if (dsk.slice > NDOSPART + 1)
589 dsk.part = *arg - 'a';
595 dsk.disk = dev_daua[dsk.type];
596 dsk.daua = dsk.disk | dsk.unit;
607 dskread(void *buf, unsigned lba, unsigned nblk)
609 struct pc98_partition *dp;
616 sec = dmadat->secbuf;
618 if (dsk.type == TYPE_FD)
620 if (drvread(sec, DOSBBSECTOR + 1))
622 dp = (void *)(sec + DOSPARTOFF);
624 if (sl < BASE_SLICE) {
625 for (i = 0; i < NDOSPART; i++)
626 if (dp[i].dp_mid == DOSMID_386BSD) {
632 if (sl != WHOLE_DISK_SLICE) {
633 dp += sl - BASE_SLICE;
634 if (dp->dp_mid != DOSMID_386BSD) {
635 printf("Invalid %s\n", "slice");
638 dsk.start = dp->dp_scyl * dsk.head * dsk.sec +
639 dp->dp_shd * dsk.sec + dp->dp_ssect;
641 if (drvread(sec, dsk.start + LABELSECTOR))
643 d = (void *)(sec + LABELOFFSET);
644 if (d->d_magic != DISKMAGIC || d->d_magic2 != DISKMAGIC) {
645 if (dsk.part != RAW_PART) {
646 printf("Invalid %s\n", "label");
650 if (dsk.part >= d->d_npartitions ||
651 !d->d_partitions[dsk.part].p_size) {
652 printf("Invalid %s\n", "partition");
655 dsk.start += d->d_partitions[dsk.part].p_offset;
656 dsk.start -= d->d_partitions[RAW_PART].p_offset;
660 for (p = buf; nblk; p += 512, lba++, nblk--) {
661 if ((i = drvread(p, dsk.start + lba)))
668 printf(const char *fmt,...)
677 while ((c = *fmt++)) {
682 putchar(va_arg(ap, int));
685 for (s = va_arg(ap, char *); *s; s++)
689 u = va_arg(ap, unsigned);
692 *s++ = '0' + u % 10U;
714 drvread(void *buf, unsigned lba)
716 static unsigned c = 0x2d5c7c2f;
717 unsigned bpc, x, cyl, head, sec;
719 bpc = dsk.sec * dsk.head;
725 if (!OPT_CHECK(RBX_QUIET))
726 printf("%c\b", c = c << 8 | c >> 24);
727 v86.ctl = V86_ADDR | V86_CALLF | V86_FLAGS;
728 v86.addr = READORG; /* call to read in boot1 */
730 v86.edx = (head << 8) | sec;
733 v86.es = VTOPSEG(buf);
734 v86.ebp = VTOPOFF(buf);
737 if (V86_CY(v86.efl)) {
738 printf("error %u c/h/s %u/%u/%u lba %u\n", v86.eax >> 8 & 0xff,
739 cyl, head, sec, lba);
752 outb(0x5f, 0); /* about 600ns */
761 if (OPT_CHECK(RBX_NOINTR))
763 for (i = 0; i < sec * 1000; i++) {
774 if (ioctrl & IO_KEYBOARD)
776 if (ioctrl & IO_SERIAL)
788 return (v86.ebx >> 8) & 0x01;
790 return v86.eax & 0xff;
796 if (OPT_CHECK(RBX_NOINTR))
799 if (ioctrl & IO_KEYBOARD && getc(1))
800 return fn ? 1 : getc(0);
801 if (ioctrl & IO_SERIAL && sio_ischar())
802 return fn ? 1 : sio_getc();