1/*-
2 * Copyright (c) 2008 John Hay
3 * Copyright (c) 1998 Robert Nordier
4 * All rights reserved.
5 *
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
9 * such forms.
10 *
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
14 * purpose.
15 */
16
17#include <sys/cdefs.h>
18__FBSDID("$FreeBSD: head/sys/boot/arm/ixp425/boot2/boot2.c 183671 2008-10-07 17:27:37Z imp $");
19
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>
25
26#include <machine/elf.h>
27
28#include <stdarg.h>
29
30#include "lib.h"
31
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). */
58
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) | \
63 OPT_SET(RBX_GDB))
64
65#define PATH_CONFIG "/boot.config"
66#define PATH_KERNEL "/boot/kernel/kernel"
67
68extern uint32_t _end;
69
70#define NOPT 6
71
72#define OPT_SET(opt) (1 << (opt))
73#define OPT_CHECK(opt) ((opts) & OPT_SET(opt))
74
75static const char optstr[NOPT] = "agnrsv";
76static const unsigned char flags[NOPT] = {
77 RBX_ASKNAME,
78 RBX_GDB,
79 RBX_NOINTR,
80 RBX_DFLTROOT,
81 RBX_SINGLE,
82 RBX_VERBOSE
83};
84
85static unsigned dsk_start;
86static char cmd[512];
87static char kname[1024];
88static uint32_t opts;
89static int dsk_meta;
90static int bootslice;
91static int bootpart;
92static int disk_layout;
93#define DL_UNKNOWN 0
94#define DL_RAW 1 /* Dangerously dedicated */
95#define DL_SLICE 2 /* Use only slices (DOS partitions) */
96#define DL_SLICEPART 3 /* Use slices and partitions */
97
98static void load(void);
99static int parse(void);
100static int xfsread(ino_t, void *, size_t);
101static int dskread(void *, unsigned, unsigned);
102static int drvread(void *, unsigned, unsigned);
103#ifdef FIXUP_BOOT_DRV
104static void fixup_boot_drv(caddr_t, int, int, int);
105#endif
106
107#include "ufsread.c"
108
109#ifdef DEBUG
110#define DPRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
111#else
112#define DPRINTF(fmt, ...)
113#endif
114
115static inline int
116xfsread(ino_t inode, void *buf, size_t nbyte)
117{
118 if ((size_t)fsread(inode, buf, nbyte) != nbyte)
119 return -1;
120 return 0;
121}
122
123static inline void
124getstr(int c)
125{
126 char *s;
127
128 s = cmd;
129 if (c == 0)
130 c = getc(10000);
131 for (;;) {
132 switch (c) {
133 case 0:
134 break;
135 case '\177':
136 case '\b':
137 if (s > cmd) {
138 s--;
139 printf("\b \b");
140 }
141 break;
142 case '\n':
143 case '\r':
144 *s = 0;
145 return;
146 default:
147 if (s - cmd < sizeof(cmd) - 1)
148 *s++ = c;
149 xputchar(c);
150 }
151 c = getc(10000);
152 }
153}
154
155int
156main(void)
157{
158 const char *bt;
159 int autoboot, c = 0;
160 ino_t ino;
161
162 dmadat = (void *)(0x1c0000);
163 p_memset((char *)dmadat, 0, 32 * 1024);
164 bt = board_init();
165
166 printf("FreeBSD ARM (%s) boot2 v%d.%d\n", bt, 0, 3);
167
168 autoboot = 1;
169
170 /* Process configuration file */
171 if ((ino = lookup(PATH_CONFIG)))
172 fsread(ino, cmd, sizeof(cmd));
173
174 if (*cmd) {
175 if (parse())
176 autoboot = 0;
177 printf("%s: %s\n", PATH_CONFIG, cmd);
178 /* Do not process this command twice */
179 *cmd = 0;
180 }
181
182 if (*kname == '\0')
183 strcpy(kname, PATH_KERNEL);
184
185 /* Present the user with the boot2 prompt. */
186 for (;;) {
187 printf("\nDefault: %s\nboot: ", kname);
188 if (!autoboot ||
189 (OPT_CHECK(RBX_NOINTR) == 0 && (c = getc(2)) != 0))
190 getstr(c);
191 xputchar('\n');
192 autoboot = 0;
193 c = 0;
194 DPRINTF("cmd is '%s'\n", cmd);
195 if (parse())
196 xputchar('\a');
197 else
198 load();
199 }
200}
201
202static void
203load(void)
204{
205 Elf32_Ehdr eh;
206 static Elf32_Phdr ep[2];
207 caddr_t p;
208 ino_t ino;
209 uint32_t addr;
210 int i, j;
211#ifdef FIXUP_BOOT_DRV
212 caddr_t staddr;
213 int klen;
214
215 staddr = (caddr_t)0xffffffff;
216 klen = 0;
217#endif
218 if (!(ino = lookup(kname))) {
219 if (!ls)
220 printf("No %s\n", kname);
221 return;
222 }
223 DPRINTF("Found %s\n", kname);
224 if (xfsread(ino, &eh, sizeof(eh)))
225 return;
226 if (!IS_ELF(eh)) {
227 printf("Invalid %s\n", "format");
228 return;
229 }
230 fs_off = eh.e_phoff;
231 for (j = i = 0; i < eh.e_phnum && j < 2; i++) {
232 if (xfsread(ino, ep + j, sizeof(ep[0])))
233 return;
234 if (ep[j].p_type == PT_LOAD)
235 j++;
236 }
237 for (i = 0; i < 2; i++) {
238 p = (caddr_t)(ep[i].p_paddr & 0x0fffffff);
239 fs_off = ep[i].p_offset;
240#ifdef FIXUP_BOOT_DRV
241 if (staddr == (caddr_t)0xffffffff)
242 staddr = p;
243 klen += ep[i].p_filesz;
244#endif
245 if (xfsread(ino, p, ep[i].p_filesz))
246 return;
247 }
248 addr = eh.e_entry & 0x0fffffff;
249 DPRINTF("Entry point %x for %s\n", addr, kname);
250 clr_board();
251#ifdef FIXUP_BOOT_DRV
252 fixup_boot_drv(staddr, klen, bootslice, bootpart);
253#endif
254 ((void(*)(int))addr)(RB_BOOTINFO /* XXX | (opts & RBX_MASK) */);
255}
256
257static int
258parse()
259{
260 char *arg = cmd;
261 char *ep, *p;
262 int c, i;
263
264 while ((c = *arg++)) {
265 if (c == ' ' || c == '\t' || c == '\n')
266 continue;
267 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
268 ep = p;
269 if (*p)
270 *p++ = 0;
271 if (c == '-') {
272 while ((c = *arg++)) {
273 for (i = 0; c != optstr[i]; i++)
274 if (i == NOPT - 1)
275 return -1;
276 opts ^= OPT_SET(flags[i]);
277 }
278 } else {
279 arg--;
280 /* look for ad0s1a:... | ad0s1:... */
281 if (strlen(arg) > 6 && arg[0] == 'a' &&
282 arg[1] == 'd' && arg[3] == 's' &&
283 (arg[5] == ':' || arg[6] == ':')) {
284 /* XXX Should also handle disk. */
285 bootslice = arg[4] - '0';
286 if (bootslice < 1 || bootslice > 4)
287 return (-1);
288 bootpart = 0;
289 if (arg[5] != ':')
290 bootpart = arg[5] - 'a';
291 if (bootpart < 0 || bootpart > 7)
292 return (-1);
293 dsk_meta = 0;
294 if (arg[5] == ':')
295 arg += 6;
296 else
297 arg += 7;
298 /* look for ad0a:... */
299 } else if (strlen(arg) > 4 && arg[0] == 'a' &&
300 arg[1] == 'd' && arg[2] == '0' && arg[4] == ':') {
301 bootslice = 0;
302 bootpart = arg[3] - 'a';
303 if (bootpart < 0 || bootpart > 7)
304 return (-1);
305 dsk_meta = 0;
306 arg += 5;
307 }
308 if ((i = ep - arg)) {
309 if ((size_t)i >= sizeof(kname))
310 return -1;
311 memcpy(kname, arg, i + 1);
312 }
313 }
314 arg = p;
315 }
316 return 0;
317}
318
319/*
320 * dskread() will try to handle the disk layouts that are typically
321 * encountered.
322 * - raw or "Dangerously Dedicated" mode. No real slice table, just the
323 * default one that is included with bsdlabel -B. Typically this is
324 * used with ROOTDEVNAME=\"ufs:ad0a\".
325 * - slice only. Only a slice table is installed with no bsd label or
326 * bsd partition table. This is typically used with
327 * ROOTDEVNAME=\"ufs:ad0s1\".
328 * - slice + bsd label + partition table. This is typically done with
329 * with fdisk + bsdlabel and is used with ROOTDEVNAME=\"ufs:ad0s1a\".
330 */
331static int
332dskread(void *buf, unsigned lba, unsigned nblk)
333{
334 struct dos_partition *dp;
335 struct disklabel *d;
336 char *sec;
337 int i;
338
339 if (!dsk_meta) {
340 sec = dmadat->secbuf;
341 dsk_start = 0;
342 if (drvread(sec, DOSBBSECTOR, 1))
343 return -1;
344 dp = (void *)(sec + DOSPARTOFF);
345 if (bootslice != 0) {
346 i = bootslice - 1;
347 if (dp[i].dp_typ != DOSPTYP_386BSD)
348 return -1;
349 } else {
350 for (i = 0; i < NDOSPART; i++) {
351 if ((dp[i].dp_typ == DOSPTYP_386BSD) &&
352 (dp[i].dp_flag == 0x80))
353 break;
354 }
355 }
356 if (i != NDOSPART) {
357 bootslice = i + 1;
358 DPRINTF("Found an active fbsd slice. (%d)\n", i + 1);
359 /*
360 * Although dp_start is aligned within the disk
361 * partition structure, DOSPARTOFF is 446, which
362 * is only word (2) aligned, not longword (4)
363 * aligned. Cope by using memcpy to fetch the
364 * start of this partition.
365 */
366 memcpy(&dsk_start, &dp[i].dp_start, 4);
367 dsk_start = swap32(dsk_start);
368 DPRINTF("dsk_start %x\n", dsk_start);
369 if ((bootslice == 4) && (dsk_start == 0)) {
370 disk_layout = DL_RAW;
371 bootslice = 0;
372 }
373 }
374 if (drvread(sec, dsk_start + LABELSECTOR, 1))
375 return -1;
376 d = (void *)(sec + LABELOFFSET);
377 if ((d->d_magic == DISKMAGIC && d->d_magic2 == DISKMAGIC) ||
378 (swap32(d->d_magic) == DISKMAGIC &&
379 swap32(d->d_magic2) == DISKMAGIC)) {
380 DPRINTF("p_size = %x\n",
381 !d->d_partitions[bootpart].p_size);
382 if (!d->d_partitions[bootpart].p_size) {
383 printf("Invalid partition\n");
384 return -1;
385 }
386 DPRINTF("p_offset %x, RAW %x\n",
387 swap32(d->d_partitions[bootpart].p_offset),
388 swap32(d->d_partitions[RAW_PART].p_offset));
389 dsk_start += swap32(d->d_partitions[bootpart].p_offset);
390 dsk_start -= swap32(d->d_partitions[RAW_PART].p_offset);
391 if ((disk_layout == DL_UNKNOWN) && (bootslice == 0))
392 disk_layout = DL_RAW;
393 else if (disk_layout == DL_UNKNOWN)
394 disk_layout = DL_SLICEPART;
395 } else {
396 disk_layout = DL_SLICE;
397 DPRINTF("Invalid %s\n", "label");
398 }
399 DPRINTF("bootslice %d, bootpart %d, dsk_start %u\n", bootslice,
400 bootpart, dsk_start);
401 dsk_meta++;
402 }
403 return drvread(buf, dsk_start + lba, nblk);
404}
405
406static int
407drvread(void *buf, unsigned lba, unsigned nblk)
408{
409 static unsigned c = 0x2d5c7c2f;
410
411 printf("%c\b", c = c << 8 | c >> 24);
412 return (avila_read((char *)buf, lba, nblk));
413}
414
415#ifdef FIXUP_BOOT_DRV
416/*
417 * fixup_boot_drv() will try to find the ROOTDEVNAME spec in the kernel
418 * and change it to what was specified on the comandline or /boot.conf
419 * file or to what was encountered on the disk. It will try to handle 3
420 * different disk layouts, raw (dangerously dedicated), slice only and
421 * slice + partition. It will look for the following strings in the
422 * kernel, but if it is one of the first three, the string in the kernel
423 * must use the correct form to match the actual disk layout:
424 * - ufs:ad0a
425 * - ufs:ad0s1
426 * - ufs:ad0s1a
427 * - ufs:ROOTDEVNAME
428 * In the case of the first three strings, only the "a" at the end and
429 * the "1" after the "s" will be modified, if they exist. The string
430 * length will not be changed. In the case of the last string, the
431 * whole string will be built up and nul, '\0' terminated.
432 */
433static void
434fixup_boot_drv(caddr_t addr, int klen, int bs, int bp)
435{
436 const u_int8_t op[] = "ufs:ROOTDEVNAME";
437 const u_int8_t op2[] = "ufs:ad0";
438 u_int8_t *p, *ps;
439
440 DPRINTF("fixup_boot_drv: 0x%x, %d, slice %d, partition %d\n",
441 (int)addr, klen, bs, bp);
442 if (bs > 4)
443 return;
444 if (bp > 7)
445 return;
446 ps = memmem(addr, klen, op, sizeof(op));
447 if (ps != NULL) {
448 p = ps + 4; /* past ufs: */
449 DPRINTF("Found it at 0x%x\n", (int)ps);
450 p[0] = 'a'; p[1] = 'd'; p[2] = '0'; /* ad0 */
451 p += 3;
452 if (bs > 0) {
453 /* append slice */
454 *p++ = 's';
455 *p++ = bs + '0';
456 }
457 if (disk_layout != DL_SLICE) {
458 /* append partition */
459 *p++ = bp + 'a';
460 }
461 *p = '\0';
462 } else {
463 ps = memmem(addr, klen, op2, sizeof(op2) - 1);
464 if (ps != NULL) {
465 p = ps + sizeof(op2) - 1;
466 DPRINTF("Found it at 0x%x\n", (int)ps);
467 if (*p == 's') {
468 /* fix slice */
469 p++;
470 *p++ = bs + '0';
471 }
472 if (*p == 'a')
473 *p = bp + 'a';
474 }
475 }
476 if (ps == NULL) {
477 printf("Could not locate \"%s\" to fix kernel boot device, "
478 "check ROOTDEVNAME is set\n", op);
479 return;
480 }
481 DPRINTF("Changed boot device to %s\n", ps);
482}
483#endif
2 * Copyright (c) 2008 John Hay
3 * Copyright (c) 1998 Robert Nordier
4 * All rights reserved.
5 *
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
9 * such forms.
10 *
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
14 * purpose.
15 */
16
17#include <sys/cdefs.h>
18__FBSDID("$FreeBSD: head/sys/boot/arm/ixp425/boot2/boot2.c 183671 2008-10-07 17:27:37Z imp $");
19
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>
25
26#include <machine/elf.h>
27
28#include <stdarg.h>
29
30#include "lib.h"
31
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). */
58
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) | \
63 OPT_SET(RBX_GDB))
64
65#define PATH_CONFIG "/boot.config"
66#define PATH_KERNEL "/boot/kernel/kernel"
67
68extern uint32_t _end;
69
70#define NOPT 6
71
72#define OPT_SET(opt) (1 << (opt))
73#define OPT_CHECK(opt) ((opts) & OPT_SET(opt))
74
75static const char optstr[NOPT] = "agnrsv";
76static const unsigned char flags[NOPT] = {
77 RBX_ASKNAME,
78 RBX_GDB,
79 RBX_NOINTR,
80 RBX_DFLTROOT,
81 RBX_SINGLE,
82 RBX_VERBOSE
83};
84
85static unsigned dsk_start;
86static char cmd[512];
87static char kname[1024];
88static uint32_t opts;
89static int dsk_meta;
90static int bootslice;
91static int bootpart;
92static int disk_layout;
93#define DL_UNKNOWN 0
94#define DL_RAW 1 /* Dangerously dedicated */
95#define DL_SLICE 2 /* Use only slices (DOS partitions) */
96#define DL_SLICEPART 3 /* Use slices and partitions */
97
98static void load(void);
99static int parse(void);
100static int xfsread(ino_t, void *, size_t);
101static int dskread(void *, unsigned, unsigned);
102static int drvread(void *, unsigned, unsigned);
103#ifdef FIXUP_BOOT_DRV
104static void fixup_boot_drv(caddr_t, int, int, int);
105#endif
106
107#include "ufsread.c"
108
109#ifdef DEBUG
110#define DPRINTF(fmt, ...) printf(fmt, __VA_ARGS__)
111#else
112#define DPRINTF(fmt, ...)
113#endif
114
115static inline int
116xfsread(ino_t inode, void *buf, size_t nbyte)
117{
118 if ((size_t)fsread(inode, buf, nbyte) != nbyte)
119 return -1;
120 return 0;
121}
122
123static inline void
124getstr(int c)
125{
126 char *s;
127
128 s = cmd;
129 if (c == 0)
130 c = getc(10000);
131 for (;;) {
132 switch (c) {
133 case 0:
134 break;
135 case '\177':
136 case '\b':
137 if (s > cmd) {
138 s--;
139 printf("\b \b");
140 }
141 break;
142 case '\n':
143 case '\r':
144 *s = 0;
145 return;
146 default:
147 if (s - cmd < sizeof(cmd) - 1)
148 *s++ = c;
149 xputchar(c);
150 }
151 c = getc(10000);
152 }
153}
154
155int
156main(void)
157{
158 const char *bt;
159 int autoboot, c = 0;
160 ino_t ino;
161
162 dmadat = (void *)(0x1c0000);
163 p_memset((char *)dmadat, 0, 32 * 1024);
164 bt = board_init();
165
166 printf("FreeBSD ARM (%s) boot2 v%d.%d\n", bt, 0, 3);
167
168 autoboot = 1;
169
170 /* Process configuration file */
171 if ((ino = lookup(PATH_CONFIG)))
172 fsread(ino, cmd, sizeof(cmd));
173
174 if (*cmd) {
175 if (parse())
176 autoboot = 0;
177 printf("%s: %s\n", PATH_CONFIG, cmd);
178 /* Do not process this command twice */
179 *cmd = 0;
180 }
181
182 if (*kname == '\0')
183 strcpy(kname, PATH_KERNEL);
184
185 /* Present the user with the boot2 prompt. */
186 for (;;) {
187 printf("\nDefault: %s\nboot: ", kname);
188 if (!autoboot ||
189 (OPT_CHECK(RBX_NOINTR) == 0 && (c = getc(2)) != 0))
190 getstr(c);
191 xputchar('\n');
192 autoboot = 0;
193 c = 0;
194 DPRINTF("cmd is '%s'\n", cmd);
195 if (parse())
196 xputchar('\a');
197 else
198 load();
199 }
200}
201
202static void
203load(void)
204{
205 Elf32_Ehdr eh;
206 static Elf32_Phdr ep[2];
207 caddr_t p;
208 ino_t ino;
209 uint32_t addr;
210 int i, j;
211#ifdef FIXUP_BOOT_DRV
212 caddr_t staddr;
213 int klen;
214
215 staddr = (caddr_t)0xffffffff;
216 klen = 0;
217#endif
218 if (!(ino = lookup(kname))) {
219 if (!ls)
220 printf("No %s\n", kname);
221 return;
222 }
223 DPRINTF("Found %s\n", kname);
224 if (xfsread(ino, &eh, sizeof(eh)))
225 return;
226 if (!IS_ELF(eh)) {
227 printf("Invalid %s\n", "format");
228 return;
229 }
230 fs_off = eh.e_phoff;
231 for (j = i = 0; i < eh.e_phnum && j < 2; i++) {
232 if (xfsread(ino, ep + j, sizeof(ep[0])))
233 return;
234 if (ep[j].p_type == PT_LOAD)
235 j++;
236 }
237 for (i = 0; i < 2; i++) {
238 p = (caddr_t)(ep[i].p_paddr & 0x0fffffff);
239 fs_off = ep[i].p_offset;
240#ifdef FIXUP_BOOT_DRV
241 if (staddr == (caddr_t)0xffffffff)
242 staddr = p;
243 klen += ep[i].p_filesz;
244#endif
245 if (xfsread(ino, p, ep[i].p_filesz))
246 return;
247 }
248 addr = eh.e_entry & 0x0fffffff;
249 DPRINTF("Entry point %x for %s\n", addr, kname);
250 clr_board();
251#ifdef FIXUP_BOOT_DRV
252 fixup_boot_drv(staddr, klen, bootslice, bootpart);
253#endif
254 ((void(*)(int))addr)(RB_BOOTINFO /* XXX | (opts & RBX_MASK) */);
255}
256
257static int
258parse()
259{
260 char *arg = cmd;
261 char *ep, *p;
262 int c, i;
263
264 while ((c = *arg++)) {
265 if (c == ' ' || c == '\t' || c == '\n')
266 continue;
267 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++);
268 ep = p;
269 if (*p)
270 *p++ = 0;
271 if (c == '-') {
272 while ((c = *arg++)) {
273 for (i = 0; c != optstr[i]; i++)
274 if (i == NOPT - 1)
275 return -1;
276 opts ^= OPT_SET(flags[i]);
277 }
278 } else {
279 arg--;
280 /* look for ad0s1a:... | ad0s1:... */
281 if (strlen(arg) > 6 && arg[0] == 'a' &&
282 arg[1] == 'd' && arg[3] == 's' &&
283 (arg[5] == ':' || arg[6] == ':')) {
284 /* XXX Should also handle disk. */
285 bootslice = arg[4] - '0';
286 if (bootslice < 1 || bootslice > 4)
287 return (-1);
288 bootpart = 0;
289 if (arg[5] != ':')
290 bootpart = arg[5] - 'a';
291 if (bootpart < 0 || bootpart > 7)
292 return (-1);
293 dsk_meta = 0;
294 if (arg[5] == ':')
295 arg += 6;
296 else
297 arg += 7;
298 /* look for ad0a:... */
299 } else if (strlen(arg) > 4 && arg[0] == 'a' &&
300 arg[1] == 'd' && arg[2] == '0' && arg[4] == ':') {
301 bootslice = 0;
302 bootpart = arg[3] - 'a';
303 if (bootpart < 0 || bootpart > 7)
304 return (-1);
305 dsk_meta = 0;
306 arg += 5;
307 }
308 if ((i = ep - arg)) {
309 if ((size_t)i >= sizeof(kname))
310 return -1;
311 memcpy(kname, arg, i + 1);
312 }
313 }
314 arg = p;
315 }
316 return 0;
317}
318
319/*
320 * dskread() will try to handle the disk layouts that are typically
321 * encountered.
322 * - raw or "Dangerously Dedicated" mode. No real slice table, just the
323 * default one that is included with bsdlabel -B. Typically this is
324 * used with ROOTDEVNAME=\"ufs:ad0a\".
325 * - slice only. Only a slice table is installed with no bsd label or
326 * bsd partition table. This is typically used with
327 * ROOTDEVNAME=\"ufs:ad0s1\".
328 * - slice + bsd label + partition table. This is typically done with
329 * with fdisk + bsdlabel and is used with ROOTDEVNAME=\"ufs:ad0s1a\".
330 */
331static int
332dskread(void *buf, unsigned lba, unsigned nblk)
333{
334 struct dos_partition *dp;
335 struct disklabel *d;
336 char *sec;
337 int i;
338
339 if (!dsk_meta) {
340 sec = dmadat->secbuf;
341 dsk_start = 0;
342 if (drvread(sec, DOSBBSECTOR, 1))
343 return -1;
344 dp = (void *)(sec + DOSPARTOFF);
345 if (bootslice != 0) {
346 i = bootslice - 1;
347 if (dp[i].dp_typ != DOSPTYP_386BSD)
348 return -1;
349 } else {
350 for (i = 0; i < NDOSPART; i++) {
351 if ((dp[i].dp_typ == DOSPTYP_386BSD) &&
352 (dp[i].dp_flag == 0x80))
353 break;
354 }
355 }
356 if (i != NDOSPART) {
357 bootslice = i + 1;
358 DPRINTF("Found an active fbsd slice. (%d)\n", i + 1);
359 /*
360 * Although dp_start is aligned within the disk
361 * partition structure, DOSPARTOFF is 446, which
362 * is only word (2) aligned, not longword (4)
363 * aligned. Cope by using memcpy to fetch the
364 * start of this partition.
365 */
366 memcpy(&dsk_start, &dp[i].dp_start, 4);
367 dsk_start = swap32(dsk_start);
368 DPRINTF("dsk_start %x\n", dsk_start);
369 if ((bootslice == 4) && (dsk_start == 0)) {
370 disk_layout = DL_RAW;
371 bootslice = 0;
372 }
373 }
374 if (drvread(sec, dsk_start + LABELSECTOR, 1))
375 return -1;
376 d = (void *)(sec + LABELOFFSET);
377 if ((d->d_magic == DISKMAGIC && d->d_magic2 == DISKMAGIC) ||
378 (swap32(d->d_magic) == DISKMAGIC &&
379 swap32(d->d_magic2) == DISKMAGIC)) {
380 DPRINTF("p_size = %x\n",
381 !d->d_partitions[bootpart].p_size);
382 if (!d->d_partitions[bootpart].p_size) {
383 printf("Invalid partition\n");
384 return -1;
385 }
386 DPRINTF("p_offset %x, RAW %x\n",
387 swap32(d->d_partitions[bootpart].p_offset),
388 swap32(d->d_partitions[RAW_PART].p_offset));
389 dsk_start += swap32(d->d_partitions[bootpart].p_offset);
390 dsk_start -= swap32(d->d_partitions[RAW_PART].p_offset);
391 if ((disk_layout == DL_UNKNOWN) && (bootslice == 0))
392 disk_layout = DL_RAW;
393 else if (disk_layout == DL_UNKNOWN)
394 disk_layout = DL_SLICEPART;
395 } else {
396 disk_layout = DL_SLICE;
397 DPRINTF("Invalid %s\n", "label");
398 }
399 DPRINTF("bootslice %d, bootpart %d, dsk_start %u\n", bootslice,
400 bootpart, dsk_start);
401 dsk_meta++;
402 }
403 return drvread(buf, dsk_start + lba, nblk);
404}
405
406static int
407drvread(void *buf, unsigned lba, unsigned nblk)
408{
409 static unsigned c = 0x2d5c7c2f;
410
411 printf("%c\b", c = c << 8 | c >> 24);
412 return (avila_read((char *)buf, lba, nblk));
413}
414
415#ifdef FIXUP_BOOT_DRV
416/*
417 * fixup_boot_drv() will try to find the ROOTDEVNAME spec in the kernel
418 * and change it to what was specified on the comandline or /boot.conf
419 * file or to what was encountered on the disk. It will try to handle 3
420 * different disk layouts, raw (dangerously dedicated), slice only and
421 * slice + partition. It will look for the following strings in the
422 * kernel, but if it is one of the first three, the string in the kernel
423 * must use the correct form to match the actual disk layout:
424 * - ufs:ad0a
425 * - ufs:ad0s1
426 * - ufs:ad0s1a
427 * - ufs:ROOTDEVNAME
428 * In the case of the first three strings, only the "a" at the end and
429 * the "1" after the "s" will be modified, if they exist. The string
430 * length will not be changed. In the case of the last string, the
431 * whole string will be built up and nul, '\0' terminated.
432 */
433static void
434fixup_boot_drv(caddr_t addr, int klen, int bs, int bp)
435{
436 const u_int8_t op[] = "ufs:ROOTDEVNAME";
437 const u_int8_t op2[] = "ufs:ad0";
438 u_int8_t *p, *ps;
439
440 DPRINTF("fixup_boot_drv: 0x%x, %d, slice %d, partition %d\n",
441 (int)addr, klen, bs, bp);
442 if (bs > 4)
443 return;
444 if (bp > 7)
445 return;
446 ps = memmem(addr, klen, op, sizeof(op));
447 if (ps != NULL) {
448 p = ps + 4; /* past ufs: */
449 DPRINTF("Found it at 0x%x\n", (int)ps);
450 p[0] = 'a'; p[1] = 'd'; p[2] = '0'; /* ad0 */
451 p += 3;
452 if (bs > 0) {
453 /* append slice */
454 *p++ = 's';
455 *p++ = bs + '0';
456 }
457 if (disk_layout != DL_SLICE) {
458 /* append partition */
459 *p++ = bp + 'a';
460 }
461 *p = '\0';
462 } else {
463 ps = memmem(addr, klen, op2, sizeof(op2) - 1);
464 if (ps != NULL) {
465 p = ps + sizeof(op2) - 1;
466 DPRINTF("Found it at 0x%x\n", (int)ps);
467 if (*p == 's') {
468 /* fix slice */
469 p++;
470 *p++ = bs + '0';
471 }
472 if (*p == 'a')
473 *p = bp + 'a';
474 }
475 }
476 if (ps == NULL) {
477 printf("Could not locate \"%s\" to fix kernel boot device, "
478 "check ROOTDEVNAME is set\n", op);
479 return;
480 }
481 DPRINTF("Changed boot device to %s\n", ps);
482}
483#endif