2 * Copyright (c) 2008 John Hay
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/diskmbr.h>
23 #include <sys/dirent.h>
24 #include <sys/reboot.h>
26 #include <machine/elf.h>
32 #define RBX_ASKNAME 0x0 /* -a */
33 #define RBX_SINGLE 0x1 /* -s */
34 /* 0x2 is reserved for log2(RB_NOSYNC). */
35 /* 0x3 is reserved for log2(RB_HALT). */
36 /* 0x4 is reserved for log2(RB_INITNAME). */
37 #define RBX_DFLTROOT 0x5 /* -r */
38 /* #define RBX_KDB 0x6 -d */
39 /* 0x7 is reserved for log2(RB_RDONLY). */
40 /* 0x8 is reserved for log2(RB_DUMP). */
41 /* 0x9 is reserved for log2(RB_MINIROOT). */
42 #define RBX_CONFIG 0xa /* -c */
43 #define RBX_VERBOSE 0xb /* -v */
44 /* #define RBX_SERIAL 0xc -h */
45 /* #define RBX_CDROM 0xd -C */
46 /* 0xe is reserved for log2(RB_POWEROFF). */
47 #define RBX_GDB 0xf /* -g */
48 /* #define RBX_MUTE 0x10 -m */
49 /* 0x11 is reserved for log2(RB_SELFTEST). */
50 /* 0x12 is reserved for boot programs. */
51 /* 0x13 is reserved for boot programs. */
52 /* #define RBX_PAUSE 0x14 -p */
53 /* #define RBX_QUIET 0x15 -q */
54 #define RBX_NOINTR 0x1c /* -n */
55 /* 0x1d is reserved for log2(RB_MULTIPLE) and is just misnamed here. */
56 /* #define RBX_DUAL 0x1d -D */
57 /* 0x1f is reserved for log2(RB_BOOTINFO). */
59 /* pass: -a, -s, -r, -v, -g */
60 #define RBX_MASK (OPT_SET(RBX_ASKNAME) | OPT_SET(RBX_SINGLE) | \
61 OPT_SET(RBX_DFLTROOT) | \
62 OPT_SET(RBX_VERBOSE) | \
65 #define PATH_DOTCONFIG "/boot.config"
66 #define PATH_CONFIG "/boot/config"
67 #define PATH_KERNEL "/boot/kernel/kernel"
73 #define OPT_SET(opt) (1 << (opt))
74 #define OPT_CHECK(opt) ((opts) & OPT_SET(opt))
76 static const char optstr[NOPT] = "agnrsv";
77 static const unsigned char flags[NOPT] = {
86 static unsigned dsk_start;
88 static char kname[1024];
90 static uint8_t dsk_meta;
93 static int disk_layout;
95 #define DL_RAW 1 /* Dangerously dedicated */
96 #define DL_SLICE 2 /* Use only slices (DOS partitions) */
97 #define DL_SLICEPART 3 /* Use slices and partitions */
99 static void load(void);
100 static int parse(void);
101 static int dskread(void *, unsigned, unsigned);
102 static int drvread(void *, unsigned, unsigned);
103 #ifdef FIXUP_BOOT_DRV
104 static void fixup_boot_drv(caddr_t, int, int, int);
110 #define DPRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
112 #define DPRINTF(fmt, ...)
116 xfsread(ufs_ino_t inode, void *buf, size_t nbyte)
118 if ((size_t)fsread(inode, buf, nbyte) != nbyte)
147 if (s - cmd < sizeof(cmd) - 1)
162 dmadat = (void *)(0x1c0000);
163 p_memset((char *)dmadat, 0, 32 * 1024);
166 printf("FreeBSD ARM (%s) boot2 v%d.%d\n", bt, 0, 4);
170 /* Process configuration file */
171 if ((ino = lookup(PATH_CONFIG)) ||
172 (ino = lookup(PATH_DOTCONFIG)))
173 fsread(ino, cmd, sizeof(cmd));
178 printf("%s: %s\n", PATH_CONFIG, cmd);
179 /* Do not process this command twice */
184 strcpy(kname, PATH_KERNEL);
186 /* Present the user with the boot2 prompt. */
188 printf("\nDefault: %s\nboot: ", kname);
190 (OPT_CHECK(RBX_NOINTR) == 0 && (c = getc(2)) != 0))
195 DPRINTF("cmd is '%s'\n", cmd);
207 static Elf32_Phdr ep[2];
212 #ifdef FIXUP_BOOT_DRV
216 staddr = (caddr_t)0xffffffff;
219 if (!(ino = lookup(kname))) {
221 printf("No %s\n", kname);
224 DPRINTF("Found %s\n", kname);
225 if (xfsread(ino, &eh, sizeof(eh)))
228 printf("Invalid %s\n", "format");
232 for (j = i = 0; i < eh.e_phnum && j < 2; i++) {
233 if (xfsread(ino, ep + j, sizeof(ep[0])))
235 if (ep[j].p_type == PT_LOAD)
238 for (i = 0; i < 2; i++) {
239 p = (caddr_t)(ep[i].p_paddr & 0x0fffffff);
240 fs_off = ep[i].p_offset;
241 #ifdef FIXUP_BOOT_DRV
242 if (staddr == (caddr_t)0xffffffff)
244 klen += ep[i].p_filesz;
246 if (xfsread(ino, p, ep[i].p_filesz))
249 addr = eh.e_entry & 0x0fffffff;
250 DPRINTF("Entry point %x for %s\n", addr, kname);
252 #ifdef FIXUP_BOOT_DRV
253 fixup_boot_drv(staddr, klen, bootslice, bootpart);
255 ((void(*)(int))addr)(RB_BOOTINFO /* XXX | (opts & RBX_MASK) */);
265 while ((c = *arg++)) {
266 if (c == ' ' || c == '\t' || c == '\n')
268 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
273 while ((c = *arg++)) {
274 for (i = 0; c != optstr[i]; i++)
277 opts ^= OPT_SET(flags[i]);
281 /* look for ad0s1a:... | ad0s1:... */
282 if (strlen(arg) > 6 && arg[0] == 'a' &&
283 arg[1] == 'd' && arg[3] == 's' &&
284 (arg[5] == ':' || arg[6] == ':')) {
285 /* XXX Should also handle disk. */
286 bootslice = arg[4] - '0';
287 if (bootslice < 1 || bootslice > 4)
291 bootpart = arg[5] - 'a';
292 if (bootpart < 0 || bootpart > 7)
299 /* look for ad0a:... */
300 } else if (strlen(arg) > 4 && arg[0] == 'a' &&
301 arg[1] == 'd' && arg[2] == '0' && arg[4] == ':') {
303 bootpart = arg[3] - 'a';
304 if (bootpart < 0 || bootpart > 7)
309 if ((i = ep - arg)) {
310 if ((size_t)i >= sizeof(kname))
312 memcpy(kname, arg, i + 1);
321 * dskread() will try to handle the disk layouts that are typically
323 * - raw or "Dangerously Dedicated" mode. No real slice table, just the
324 * default one that is included with bsdlabel -B. Typically this is
325 * used with ROOTDEVNAME=\"ufs:ad0a\".
326 * - slice only. Only a slice table is installed with no bsd label or
327 * bsd partition table. This is typically used with
328 * ROOTDEVNAME=\"ufs:ad0s1\".
329 * - slice + bsd label + partition table. This is typically done with
330 * with fdisk + bsdlabel and is used with ROOTDEVNAME=\"ufs:ad0s1a\".
333 dskread(void *buf, unsigned lba, unsigned nblk)
335 struct dos_partition *dp;
341 sec = dmadat->secbuf;
343 if (drvread(sec, DOSBBSECTOR, 1))
345 dp = (void *)(sec + DOSPARTOFF);
346 if (bootslice != 0) {
348 if (dp[i].dp_typ != DOSPTYP_386BSD)
351 for (i = 0; i < NDOSPART; i++) {
352 if ((dp[i].dp_typ == DOSPTYP_386BSD) &&
353 (dp[i].dp_flag == 0x80))
359 DPRINTF("Found an active fbsd slice. (%d)\n", i + 1);
361 * Although dp_start is aligned within the disk
362 * partition structure, DOSPARTOFF is 446, which
363 * is only word (2) aligned, not longword (4)
364 * aligned. Cope by using memcpy to fetch the
365 * start of this partition.
367 memcpy(&dsk_start, &dp[i].dp_start, 4);
368 dsk_start = swap32(dsk_start);
369 DPRINTF("dsk_start %x\n", dsk_start);
370 if ((bootslice == 4) && (dsk_start == 0)) {
371 disk_layout = DL_RAW;
375 if (drvread(sec, dsk_start + LABELSECTOR, 1))
377 d = (void *)(sec + LABELOFFSET);
378 if ((d->d_magic == DISKMAGIC && d->d_magic2 == DISKMAGIC) ||
379 (swap32(d->d_magic) == DISKMAGIC &&
380 swap32(d->d_magic2) == DISKMAGIC)) {
381 DPRINTF("p_size = %x\n",
382 !d->d_partitions[bootpart].p_size);
383 if (!d->d_partitions[bootpart].p_size) {
384 printf("Invalid partition\n");
387 DPRINTF("p_offset %x, RAW %x\n",
388 swap32(d->d_partitions[bootpart].p_offset),
389 swap32(d->d_partitions[RAW_PART].p_offset));
390 dsk_start += swap32(d->d_partitions[bootpart].p_offset);
391 dsk_start -= swap32(d->d_partitions[RAW_PART].p_offset);
392 if ((disk_layout == DL_UNKNOWN) && (bootslice == 0))
393 disk_layout = DL_RAW;
394 else if (disk_layout == DL_UNKNOWN)
395 disk_layout = DL_SLICEPART;
397 disk_layout = DL_SLICE;
398 DPRINTF("Invalid %s\n", "label");
400 DPRINTF("bootslice %d, bootpart %d, dsk_start %u\n", bootslice,
401 bootpart, dsk_start);
404 return drvread(buf, dsk_start + lba, nblk);
408 drvread(void *buf, unsigned lba, unsigned nblk)
410 static unsigned c = 0x2d5c7c2f;
412 printf("%c\b", c = c << 8 | c >> 24);
413 return (avila_read((char *)buf, lba, nblk));
416 #ifdef FIXUP_BOOT_DRV
418 * fixup_boot_drv() will try to find the ROOTDEVNAME spec in the kernel
419 * and change it to what was specified on the comandline or /boot.conf
420 * file or to what was encountered on the disk. It will try to handle 3
421 * different disk layouts, raw (dangerously dedicated), slice only and
422 * slice + partition. It will look for the following strings in the
423 * kernel, but if it is one of the first three, the string in the kernel
424 * must use the correct form to match the actual disk layout:
429 * In the case of the first three strings, only the "a" at the end and
430 * the "1" after the "s" will be modified, if they exist. The string
431 * length will not be changed. In the case of the last string, the
432 * whole string will be built up and nul, '\0' terminated.
435 fixup_boot_drv(caddr_t addr, int klen, int bs, int bp)
437 const u_int8_t op[] = "ufs:ROOTDEVNAME";
438 const u_int8_t op2[] = "ufs:ad0";
441 DPRINTF("fixup_boot_drv: 0x%x, %d, slice %d, partition %d\n",
442 (int)addr, klen, bs, bp);
447 ps = memmem(addr, klen, op, sizeof(op));
449 p = ps + 4; /* past ufs: */
450 DPRINTF("Found it at 0x%x\n", (int)ps);
451 p[0] = 'a'; p[1] = 'd'; p[2] = '0'; /* ad0 */
458 if (disk_layout != DL_SLICE) {
459 /* append partition */
464 ps = memmem(addr, klen, op2, sizeof(op2) - 1);
466 p = ps + sizeof(op2) - 1;
467 DPRINTF("Found it at 0x%x\n", (int)ps);
478 printf("Could not locate \"%s\" to fix kernel boot device, "
479 "check ROOTDEVNAME is set\n", op);
482 DPRINTF("Changed boot device to %s\n", ps);