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[FreeBSD/releng/10.2.git] / sys / boot / powerpc / boot1.chrp / boot1.c
1 /*-
2  * Copyright (c) 1998 Robert Nordier
3  * All rights reserved.
4  * Copyright (c) 2001 Robert Drehmel
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms are freely
8  * permitted provided that the above copyright notice and this
9  * paragraph and the following disclaimer are duplicated in all
10  * such forms.
11  *
12  * This software is provided "AS IS" and without any express or
13  * implied warranties, including, without limitation, the implied
14  * warranties of merchantability and fitness for a particular
15  * purpose.
16  */
17
18 #include <sys/cdefs.h>
19 __FBSDID("$FreeBSD$");
20
21 #include <sys/param.h>
22 #include <sys/dirent.h>
23 #include <machine/elf.h>
24 #include <machine/stdarg.h>
25
26 #define _PATH_LOADER    "/boot/loader"
27 #define _PATH_KERNEL    "/boot/kernel/kernel"
28
29 #define BSIZEMAX        16384
30
31 typedef int putc_func_t(char c, void *arg);
32 typedef int32_t ofwh_t;
33
34 struct sp_data {
35         char    *sp_buf;
36         u_int   sp_len;
37         u_int   sp_size;
38 };
39
40 static const char digits[] = "0123456789abcdef";
41
42 static char bootpath[128];
43 static char bootargs[128];
44
45 static ofwh_t bootdev;
46
47 static struct fs fs;
48 static char blkbuf[BSIZEMAX];
49 static unsigned int fsblks;
50
51 static uint32_t fs_off;
52
53 int main(int ac, char **av);
54
55 static void exit(int) __dead2;
56 static void load(const char *);
57 static int dskread(void *, u_int64_t, int);
58
59 static void usage(void);
60
61 static void bcopy(const void *src, void *dst, size_t len);
62 static void bzero(void *b, size_t len);
63
64 static int domount(const char *device, int quiet);
65
66 static void panic(const char *fmt, ...) __dead2;
67 static int printf(const char *fmt, ...);
68 static int putchar(char c, void *arg);
69 static int vprintf(const char *fmt, va_list ap);
70 static int vsnprintf(char *str, size_t sz, const char *fmt, va_list ap);
71
72 static int __printf(const char *fmt, putc_func_t *putc, void *arg, va_list ap);
73 static int __putc(char c, void *arg);
74 static int __puts(const char *s, putc_func_t *putc, void *arg);
75 static int __sputc(char c, void *arg);
76 static char *__uitoa(char *buf, u_int val, int base);
77 static char *__ultoa(char *buf, u_long val, int base);
78
79 void __syncicache(void *, int);
80
81 /*
82  * Open Firmware interface functions
83  */
84 typedef u_int32_t       ofwcell_t;
85 typedef u_int32_t       u_ofwh_t;
86 typedef int (*ofwfp_t)(void *);
87 ofwfp_t ofw;                    /* the prom Open Firmware entry */
88 ofwh_t chosenh;
89
90 void ofw_init(void *, int, int (*)(void *), char *, int);
91 static ofwh_t ofw_finddevice(const char *);
92 static ofwh_t ofw_open(const char *);
93 static int ofw_close(ofwh_t);
94 static int ofw_getprop(ofwh_t, const char *, void *, size_t);
95 static int ofw_setprop(ofwh_t, const char *, void *, size_t);
96 static int ofw_read(ofwh_t, void *, size_t);
97 static int ofw_write(ofwh_t, const void *, size_t);
98 static int ofw_claim(void *virt, size_t len, u_int align);
99 static int ofw_seek(ofwh_t, u_int64_t);
100 static void ofw_exit(void) __dead2;
101
102 ofwh_t bootdevh;
103 ofwh_t stdinh, stdouth;
104
105 __asm("                         \n\
106         .data                   \n\
107         .align 4                \n\
108 stack:                          \n\
109         .space  16384           \n\
110                                 \n\
111         .text                   \n\
112         .globl  _start          \n\
113 _start:                         \n\
114         lis     %r1,stack@ha    \n\
115         addi    %r1,%r1,stack@l \n\
116         addi    %r1,%r1,8192    \n\
117                                 \n\
118         b       ofw_init        \n\
119 ");
120
121 void
122 ofw_init(void *vpd, int res, int (*openfirm)(void *), char *arg, int argl)
123 {
124         char *av[16];
125         char *p;
126         int ac;
127
128         ofw = openfirm;
129
130         chosenh = ofw_finddevice("/chosen");
131         ofw_getprop(chosenh, "stdin", &stdinh, sizeof(stdinh));
132         ofw_getprop(chosenh, "stdout", &stdouth, sizeof(stdouth));
133         ofw_getprop(chosenh, "bootargs", bootargs, sizeof(bootargs));
134         ofw_getprop(chosenh, "bootpath", bootpath, sizeof(bootpath));
135
136         bootargs[sizeof(bootargs) - 1] = '\0';
137         bootpath[sizeof(bootpath) - 1] = '\0';
138
139         p = bootpath;
140         while (*p != '\0') {
141                 if (*p == ':') {
142                         *(++p) = '\0';
143                         break;
144                 }
145                 p++;
146         }
147
148         ac = 0;
149         p = bootargs;
150         for (;;) {
151                 while (*p == ' ' && *p != '\0')
152                         p++;
153                 if (*p == '\0' || ac >= 16)
154                         break;
155                 av[ac++] = p;
156                 while (*p != ' ' && *p != '\0')
157                         p++;
158                 if (*p != '\0')
159                         *p++ = '\0';
160         }
161
162         exit(main(ac, av));
163 }
164
165 static ofwh_t
166 ofw_finddevice(const char *name)
167 {
168         ofwcell_t args[] = {
169                 (ofwcell_t)"finddevice",
170                 1,
171                 1,
172                 (ofwcell_t)name,
173                 0
174         };
175
176         if ((*ofw)(args)) {
177                 printf("ofw_finddevice: name=\"%s\"\n", name);
178                 return (1);
179         }
180         return (args[4]);
181 }
182
183 static int
184 ofw_getprop(ofwh_t ofwh, const char *name, void *buf, size_t len)
185 {
186         ofwcell_t args[] = {
187                 (ofwcell_t)"getprop",
188                 4,
189                 1,
190                 (u_ofwh_t)ofwh,
191                 (ofwcell_t)name,
192                 (ofwcell_t)buf,
193                 len,
194         0
195         };
196
197         if ((*ofw)(args)) {
198                 printf("ofw_getprop: ofwh=0x%x buf=%p len=%u\n",
199                         ofwh, buf, len);
200                 return (1);
201         }
202         return (0);
203 }
204
205 static int
206 ofw_setprop(ofwh_t ofwh, const char *name, void *buf, size_t len)
207 {
208         ofwcell_t args[] = {
209                 (ofwcell_t)"setprop",
210                 4,
211                 1,
212                 (u_ofwh_t)ofwh,
213                 (ofwcell_t)name,
214                 (ofwcell_t)buf,
215                 len,
216         0
217         };
218
219         if ((*ofw)(args)) {
220                 printf("ofw_setprop: ofwh=0x%x buf=%p len=%u\n",
221                         ofwh, buf, len);
222                 return (1);
223         }
224         return (0);
225 }
226
227 static ofwh_t
228 ofw_open(const char *path)
229 {
230         ofwcell_t args[] = {
231                 (ofwcell_t)"open",
232                 1,
233                 1,
234                 (ofwcell_t)path,
235                 0
236         };
237
238         if ((*ofw)(args)) {
239                 printf("ofw_open: path=\"%s\"\n", path);
240                 return (-1);
241         }
242         return (args[4]);
243 }
244
245 static int
246 ofw_close(ofwh_t devh)
247 {
248         ofwcell_t args[] = {
249                 (ofwcell_t)"close",
250                 1,
251                 0,
252                 (u_ofwh_t)devh
253         };
254
255         if ((*ofw)(args)) {
256                 printf("ofw_close: devh=0x%x\n", devh);
257                 return (1);
258         }
259         return (0);
260 }
261
262 static int
263 ofw_claim(void *virt, size_t len, u_int align)
264 {
265         ofwcell_t args[] = {
266                 (ofwcell_t)"claim",
267                 3,
268                 1,
269                 (ofwcell_t)virt,
270                 len,
271                 align,
272                 0,
273                 0
274         };
275
276         if ((*ofw)(args)) {
277                 printf("ofw_claim: virt=%p len=%u\n", virt, len);
278                 return (1);
279         }
280
281         return (0);
282 }
283
284 static int
285 ofw_read(ofwh_t devh, void *buf, size_t len)
286 {
287         ofwcell_t args[] = {
288                 (ofwcell_t)"read",
289                 3,
290                 1,
291                 (u_ofwh_t)devh,
292                 (ofwcell_t)buf,
293                 len,
294                 0
295         };
296
297         if ((*ofw)(args)) {
298                 printf("ofw_read: devh=0x%x buf=%p len=%u\n", devh, buf, len);
299                 return (1);
300         }
301         return (0);
302 }
303
304 static int
305 ofw_write(ofwh_t devh, const void *buf, size_t len)
306 {
307         ofwcell_t args[] = {
308                 (ofwcell_t)"write",
309                 3,
310                 1,
311                 (u_ofwh_t)devh,
312                 (ofwcell_t)buf,
313                 len,
314                 0
315         };
316
317         if ((*ofw)(args)) {
318                 printf("ofw_write: devh=0x%x buf=%p len=%u\n", devh, buf, len);
319                 return (1);
320         }
321         return (0);
322 }
323
324 static int
325 ofw_seek(ofwh_t devh, u_int64_t off)
326 {
327         ofwcell_t args[] = {
328                 (ofwcell_t)"seek",
329                 3,
330                 1,
331                 (u_ofwh_t)devh,
332                 off >> 32,
333                 off,
334                 0
335         };
336
337         if ((*ofw)(args)) {
338                 printf("ofw_seek: devh=0x%x off=0x%lx\n", devh, off);
339                 return (1);
340         }
341         return (0);
342 }
343
344 static void
345 ofw_exit(void)
346 {
347         ofwcell_t args[3];
348
349         args[0] = (ofwcell_t)"exit";
350         args[1] = 0;
351         args[2] = 0;
352
353         for (;;)
354                 (*ofw)(args);
355 }
356
357 static void
358 bcopy(const void *src, void *dst, size_t len)
359 {
360         const char *s = src;
361         char *d = dst;
362
363         while (len-- != 0)
364                 *d++ = *s++;
365 }
366
367 static void
368 memcpy(void *dst, const void *src, size_t len)
369 {
370         bcopy(src, dst, len);
371 }
372
373 static void
374 bzero(void *b, size_t len)
375 {
376         char *p = b;
377
378         while (len-- != 0)
379                 *p++ = 0;
380 }
381
382 static int
383 strcmp(const char *s1, const char *s2)
384 {
385         for (; *s1 == *s2 && *s1; s1++, s2++)
386                 ;
387         return ((u_char)*s1 - (u_char)*s2);
388 }
389
390 #include "ufsread.c"
391
392 int
393 main(int ac, char **av)
394 {
395         const char *path;
396         char bootpath_full[255];
397         int i, len;
398
399         path = _PATH_LOADER;
400         for (i = 0; i < ac; i++) {
401                 switch (av[i][0]) {
402                 case '-':
403                         switch (av[i][1]) {
404                         default:
405                                 usage();
406                         }
407                         break;
408                 default:
409                         path = av[i];
410                         break;
411                 }
412         }
413
414         printf(" \n>> FreeBSD/powerpc Open Firmware boot block\n"
415         "   Boot path:   %s\n"
416         "   Boot loader: %s\n", bootpath, path);
417
418         len = 0;
419         while (bootpath[len] != '\0') len++;
420
421         memcpy(bootpath_full,bootpath,len+1);
422
423         if (bootpath_full[len-1] == ':') {
424                 for (i = 0; i < 16; i++) {
425                         if (i < 10) {
426                                 bootpath_full[len] = i + '0';
427                                 bootpath_full[len+1] = '\0';
428                         } else {
429                                 bootpath_full[len] = '1';
430                                 bootpath_full[len+1] = i - 10 + '0';
431                                 bootpath_full[len+2] = '\0';
432                         }
433                                 
434                         if (domount(bootpath_full,1) >= 0)
435                                 break;
436
437                         if (bootdev > 0)
438                                 ofw_close(bootdev);
439                 }
440
441                 if (i >= 16)
442                         panic("domount");
443         } else {
444                 if (domount(bootpath_full,0) == -1)
445                         panic("domount");
446         }
447
448         printf("   Boot volume:   %s\n",bootpath_full);
449         ofw_setprop(chosenh, "bootargs", bootpath_full, len+2);
450         load(path);
451         return (1);
452 }
453
454 static void
455 usage(void)
456 {
457
458         printf("usage: boot device [/path/to/loader]\n");
459         exit(1);
460 }
461
462 static void
463 exit(int code)
464 {
465
466         ofw_exit();
467 }
468
469 static struct dmadat __dmadat;
470
471 static int
472 domount(const char *device, int quiet)
473 {
474
475         dmadat = &__dmadat;
476         if ((bootdev = ofw_open(device)) == -1) {
477                 printf("domount: can't open device\n");
478                 return (-1);
479         }
480         if (fsread(0, NULL, 0)) {
481                 if (!quiet)
482                         printf("domount: can't read superblock\n");
483                 return (-1);
484         }
485         return (0);
486 }
487
488 static void
489 load(const char *fname)
490 {
491         Elf32_Ehdr eh;
492         Elf32_Phdr ph;
493         caddr_t p;
494         ufs_ino_t ino;
495         int i;
496
497         if ((ino = lookup(fname)) == 0) {
498                 printf("File %s not found\n", fname);
499                 return;
500         }
501         if (fsread(ino, &eh, sizeof(eh)) != sizeof(eh)) {
502                 printf("Can't read elf header\n");
503                 return;
504         }
505         if (!IS_ELF(eh)) {
506                 printf("Not an ELF file\n");
507                 return;
508         }
509         for (i = 0; i < eh.e_phnum; i++) {
510                 fs_off = eh.e_phoff + i * eh.e_phentsize;
511                 if (fsread(ino, &ph, sizeof(ph)) != sizeof(ph)) {
512                         printf("Can't read program header %d\n", i);
513                         return;
514                 }
515                 if (ph.p_type != PT_LOAD)
516                         continue;
517                 fs_off = ph.p_offset;
518                 p = (caddr_t)ph.p_vaddr;
519                 ofw_claim(p,(ph.p_filesz > ph.p_memsz) ? 
520                     ph.p_filesz : ph.p_memsz,0);
521                 if (fsread(ino, p, ph.p_filesz) != ph.p_filesz) {
522                         printf("Can't read content of section %d\n", i);
523                         return;
524                 }
525                 if (ph.p_filesz != ph.p_memsz)
526                         bzero(p + ph.p_filesz, ph.p_memsz - ph.p_filesz);
527                 __syncicache(p, ph.p_memsz);
528         }
529         ofw_close(bootdev);
530         (*(void (*)(void *, int, ofwfp_t, char *, int))eh.e_entry)(NULL, 0, 
531             ofw,NULL,0);
532 }
533
534 static int
535 dskread(void *buf, u_int64_t lba, int nblk)
536 {
537         /*
538          * The Open Firmware should open the correct partition for us.
539          * That means, if we read from offset zero on an open instance handle,
540          * we should read from offset zero of that partition.
541          */
542         ofw_seek(bootdev, lba * DEV_BSIZE);
543         ofw_read(bootdev, buf, nblk * DEV_BSIZE);
544         return (0);
545 }
546
547 static void
548 panic(const char *fmt, ...)
549 {
550         char buf[128];
551         va_list ap;
552
553         va_start(ap, fmt);
554         vsnprintf(buf, sizeof buf, fmt, ap);
555         printf("panic: %s\n", buf);
556         va_end(ap);
557
558         exit(1);
559 }
560
561 static int
562 printf(const char *fmt, ...)
563 {
564         va_list ap;
565         int ret;
566
567         /* Don't annoy the user as we probe for partitions */
568         if (strcmp(fmt,"Not ufs\n") == 0)
569                 return 0;
570
571         va_start(ap, fmt);
572         ret = vprintf(fmt, ap);
573         va_end(ap);
574         return (ret);
575 }
576
577 static int
578 putchar(char c, void *arg)
579 {
580         char buf;
581
582         if (c == '\n') {
583                 buf = '\r';
584                 ofw_write(stdouth, &buf, 1);
585         }
586         buf = c;
587         ofw_write(stdouth, &buf, 1);
588         return (1);
589 }
590
591 static int
592 vprintf(const char *fmt, va_list ap)
593 {
594         int ret;
595
596         ret = __printf(fmt, putchar, 0, ap);
597         return (ret);
598 }
599
600 static int
601 vsnprintf(char *str, size_t sz, const char *fmt, va_list ap)
602 {
603         struct sp_data sp;
604         int ret;
605
606         sp.sp_buf = str;
607         sp.sp_len = 0;
608         sp.sp_size = sz;
609         ret = __printf(fmt, __sputc, &sp, ap);
610         return (ret);
611 }
612
613 static int
614 __printf(const char *fmt, putc_func_t *putc, void *arg, va_list ap)
615 {
616         char buf[(sizeof(long) * 8) + 1];
617         char *nbuf;
618         u_long ul;
619         u_int ui;
620         int lflag;
621         int sflag;
622         char *s;
623         int pad;
624         int ret;
625         int c;
626
627         nbuf = &buf[sizeof buf - 1];
628         ret = 0;
629         while ((c = *fmt++) != 0) {
630                 if (c != '%') {
631                         ret += putc(c, arg);
632                         continue;
633                 }
634                 lflag = 0;
635                 sflag = 0;
636                 pad = 0;
637 reswitch:       c = *fmt++;
638                 switch (c) {
639                 case '#':
640                         sflag = 1;
641                         goto reswitch;
642                 case '%':
643                         ret += putc('%', arg);
644                         break;
645                 case 'c':
646                         c = va_arg(ap, int);
647                         ret += putc(c, arg);
648                         break;
649                 case 'd':
650                         if (lflag == 0) {
651                                 ui = (u_int)va_arg(ap, int);
652                                 if (ui < (int)ui) {
653                                         ui = -ui;
654                                         ret += putc('-', arg);
655                                 }
656                                 s = __uitoa(nbuf, ui, 10);
657                         } else {
658                                 ul = (u_long)va_arg(ap, long);
659                                 if (ul < (long)ul) {
660                                         ul = -ul;
661                                         ret += putc('-', arg);
662                                 }
663                                 s = __ultoa(nbuf, ul, 10);
664                         }
665                         ret += __puts(s, putc, arg);
666                         break;
667                 case 'l':
668                         lflag = 1;
669                         goto reswitch;
670                 case 'o':
671                         if (lflag == 0) {
672                                 ui = (u_int)va_arg(ap, u_int);
673                                 s = __uitoa(nbuf, ui, 8);
674                         } else {
675                                 ul = (u_long)va_arg(ap, u_long);
676                                 s = __ultoa(nbuf, ul, 8);
677                         }
678                         ret += __puts(s, putc, arg);
679                         break;
680                 case 'p':
681                         ul = (u_long)va_arg(ap, void *);
682                         s = __ultoa(nbuf, ul, 16);
683                         ret += __puts("0x", putc, arg);
684                         ret += __puts(s, putc, arg);
685                         break;
686                 case 's':
687                         s = va_arg(ap, char *);
688                         ret += __puts(s, putc, arg);
689                         break;
690                 case 'u':
691                         if (lflag == 0) {
692                                 ui = va_arg(ap, u_int);
693                                 s = __uitoa(nbuf, ui, 10);
694                         } else {
695                                 ul = va_arg(ap, u_long);
696                                 s = __ultoa(nbuf, ul, 10);
697                         }
698                         ret += __puts(s, putc, arg);
699                         break;
700                 case 'x':
701                         if (lflag == 0) {
702                                 ui = va_arg(ap, u_int);
703                                 s = __uitoa(nbuf, ui, 16);
704                         } else {
705                                 ul = va_arg(ap, u_long);
706                                 s = __ultoa(nbuf, ul, 16);
707                         }
708                         if (sflag)
709                                 ret += __puts("0x", putc, arg);
710                         ret += __puts(s, putc, arg);
711                         break;
712                 case '0': case '1': case '2': case '3': case '4':
713                 case '5': case '6': case '7': case '8': case '9':
714                         pad = pad * 10 + c - '0';
715                         goto reswitch;
716                 default:
717                         break;
718                 }
719         }
720         return (ret);
721 }
722
723 static int
724 __sputc(char c, void *arg)
725 {
726         struct sp_data *sp;
727
728         sp = arg;
729         if (sp->sp_len < sp->sp_size)
730                 sp->sp_buf[sp->sp_len++] = c;
731         sp->sp_buf[sp->sp_len] = '\0';
732         return (1);
733 }
734
735 static int
736 __puts(const char *s, putc_func_t *putc, void *arg)
737 {
738         const char *p;
739         int ret;
740
741         ret = 0;
742         for (p = s; *p != '\0'; p++)
743                 ret += putc(*p, arg);
744         return (ret);
745 }
746
747 static char *
748 __uitoa(char *buf, u_int ui, int base)
749 {
750         char *p;
751
752         p = buf;
753         *p = '\0';
754         do
755                 *--p = digits[ui % base];
756         while ((ui /= base) != 0);
757         return (p);
758 }
759
760 static char *
761 __ultoa(char *buf, u_long ul, int base)
762 {
763         char *p;
764
765         p = buf;
766         *p = '\0';
767         do
768                 *--p = digits[ul % base];
769         while ((ul /= base) != 0);
770         return (p);
771 }