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-rw-r--r--arch/ppc64/boot/prom.c637
1 files changed, 637 insertions, 0 deletions
diff --git a/arch/ppc64/boot/prom.c b/arch/ppc64/boot/prom.c
new file mode 100644
index 000000000000..7b607d1862cb
--- /dev/null
+++ b/arch/ppc64/boot/prom.c
@@ -0,0 +1,637 @@
1/*
2 * Copyright (C) Paul Mackerras 1997.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9#include <stdarg.h>
10#include <linux/types.h>
11#include <linux/string.h>
12#include <linux/ctype.h>
13
14int (*prom)(void *);
15
16void *chosen_handle;
17void *stdin;
18void *stdout;
19void *stderr;
20
21void exit(void);
22void *finddevice(const char *name);
23int getprop(void *phandle, const char *name, void *buf, int buflen);
24void chrpboot(int a1, int a2, void *prom); /* in main.c */
25
26void printk(char *fmt, ...);
27
28/* there is no convenient header to get this from... -- paulus */
29extern unsigned long strlen(const char *);
30
31int
32write(void *handle, void *ptr, int nb)
33{
34 struct prom_args {
35 char *service;
36 int nargs;
37 int nret;
38 void *ihandle;
39 void *addr;
40 int len;
41 int actual;
42 } args;
43
44 args.service = "write";
45 args.nargs = 3;
46 args.nret = 1;
47 args.ihandle = handle;
48 args.addr = ptr;
49 args.len = nb;
50 args.actual = -1;
51 (*prom)(&args);
52 return args.actual;
53}
54
55int
56read(void *handle, void *ptr, int nb)
57{
58 struct prom_args {
59 char *service;
60 int nargs;
61 int nret;
62 void *ihandle;
63 void *addr;
64 int len;
65 int actual;
66 } args;
67
68 args.service = "read";
69 args.nargs = 3;
70 args.nret = 1;
71 args.ihandle = handle;
72 args.addr = ptr;
73 args.len = nb;
74 args.actual = -1;
75 (*prom)(&args);
76 return args.actual;
77}
78
79void
80exit()
81{
82 struct prom_args {
83 char *service;
84 } args;
85
86 for (;;) {
87 args.service = "exit";
88 (*prom)(&args);
89 }
90}
91
92void
93pause(void)
94{
95 struct prom_args {
96 char *service;
97 } args;
98
99 args.service = "enter";
100 (*prom)(&args);
101}
102
103void *
104finddevice(const char *name)
105{
106 struct prom_args {
107 char *service;
108 int nargs;
109 int nret;
110 const char *devspec;
111 void *phandle;
112 } args;
113
114 args.service = "finddevice";
115 args.nargs = 1;
116 args.nret = 1;
117 args.devspec = name;
118 args.phandle = (void *) -1;
119 (*prom)(&args);
120 return args.phandle;
121}
122
123void *
124claim(unsigned long virt, unsigned long size, unsigned long align)
125{
126 struct prom_args {
127 char *service;
128 int nargs;
129 int nret;
130 unsigned int virt;
131 unsigned int size;
132 unsigned int align;
133 void *ret;
134 } args;
135
136 args.service = "claim";
137 args.nargs = 3;
138 args.nret = 1;
139 args.virt = virt;
140 args.size = size;
141 args.align = align;
142 (*prom)(&args);
143 return args.ret;
144}
145
146int
147getprop(void *phandle, const char *name, void *buf, int buflen)
148{
149 struct prom_args {
150 char *service;
151 int nargs;
152 int nret;
153 void *phandle;
154 const char *name;
155 void *buf;
156 int buflen;
157 int size;
158 } args;
159
160 args.service = "getprop";
161 args.nargs = 4;
162 args.nret = 1;
163 args.phandle = phandle;
164 args.name = name;
165 args.buf = buf;
166 args.buflen = buflen;
167 args.size = -1;
168 (*prom)(&args);
169 return args.size;
170}
171
172int
173putc(int c, void *f)
174{
175 char ch = c;
176
177 if (c == '\n')
178 putc('\r', f);
179 return write(f, &ch, 1) == 1? c: -1;
180}
181
182int
183putchar(int c)
184{
185 return putc(c, stdout);
186}
187
188int
189fputs(char *str, void *f)
190{
191 int n = strlen(str);
192
193 return write(f, str, n) == n? 0: -1;
194}
195
196int
197readchar(void)
198{
199 char ch;
200
201 for (;;) {
202 switch (read(stdin, &ch, 1)) {
203 case 1:
204 return ch;
205 case -1:
206 printk("read(stdin) returned -1\r\n");
207 return -1;
208 }
209 }
210}
211
212static char line[256];
213static char *lineptr;
214static int lineleft;
215
216int
217getchar(void)
218{
219 int c;
220
221 if (lineleft == 0) {
222 lineptr = line;
223 for (;;) {
224 c = readchar();
225 if (c == -1 || c == 4)
226 break;
227 if (c == '\r' || c == '\n') {
228 *lineptr++ = '\n';
229 putchar('\n');
230 break;
231 }
232 switch (c) {
233 case 0177:
234 case '\b':
235 if (lineptr > line) {
236 putchar('\b');
237 putchar(' ');
238 putchar('\b');
239 --lineptr;
240 }
241 break;
242 case 'U' & 0x1F:
243 while (lineptr > line) {
244 putchar('\b');
245 putchar(' ');
246 putchar('\b');
247 --lineptr;
248 }
249 break;
250 default:
251 if (lineptr >= &line[sizeof(line) - 1])
252 putchar('\a');
253 else {
254 putchar(c);
255 *lineptr++ = c;
256 }
257 }
258 }
259 lineleft = lineptr - line;
260 lineptr = line;
261 }
262 if (lineleft == 0)
263 return -1;
264 --lineleft;
265 return *lineptr++;
266}
267
268
269
270/* String functions lifted from lib/vsprintf.c and lib/ctype.c */
271unsigned char _ctype[] = {
272_C,_C,_C,_C,_C,_C,_C,_C, /* 0-7 */
273_C,_C|_S,_C|_S,_C|_S,_C|_S,_C|_S,_C,_C, /* 8-15 */
274_C,_C,_C,_C,_C,_C,_C,_C, /* 16-23 */
275_C,_C,_C,_C,_C,_C,_C,_C, /* 24-31 */
276_S|_SP,_P,_P,_P,_P,_P,_P,_P, /* 32-39 */
277_P,_P,_P,_P,_P,_P,_P,_P, /* 40-47 */
278_D,_D,_D,_D,_D,_D,_D,_D, /* 48-55 */
279_D,_D,_P,_P,_P,_P,_P,_P, /* 56-63 */
280_P,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U, /* 64-71 */
281_U,_U,_U,_U,_U,_U,_U,_U, /* 72-79 */
282_U,_U,_U,_U,_U,_U,_U,_U, /* 80-87 */
283_U,_U,_U,_P,_P,_P,_P,_P, /* 88-95 */
284_P,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L, /* 96-103 */
285_L,_L,_L,_L,_L,_L,_L,_L, /* 104-111 */
286_L,_L,_L,_L,_L,_L,_L,_L, /* 112-119 */
287_L,_L,_L,_P,_P,_P,_P,_C, /* 120-127 */
2880,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 128-143 */
2890,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 144-159 */
290_S|_SP,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P, /* 160-175 */
291_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P, /* 176-191 */
292_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U, /* 192-207 */
293_U,_U,_U,_U,_U,_U,_U,_P,_U,_U,_U,_U,_U,_U,_U,_L, /* 208-223 */
294_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L, /* 224-239 */
295_L,_L,_L,_L,_L,_L,_L,_P,_L,_L,_L,_L,_L,_L,_L,_L}; /* 240-255 */
296
297size_t strnlen(const char * s, size_t count)
298{
299 const char *sc;
300
301 for (sc = s; count-- && *sc != '\0'; ++sc)
302 /* nothing */;
303 return sc - s;
304}
305
306unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
307{
308 unsigned long result = 0,value;
309
310 if (!base) {
311 base = 10;
312 if (*cp == '0') {
313 base = 8;
314 cp++;
315 if ((*cp == 'x') && isxdigit(cp[1])) {
316 cp++;
317 base = 16;
318 }
319 }
320 }
321 while (isxdigit(*cp) &&
322 (value = isdigit(*cp) ? *cp-'0' : toupper(*cp)-'A'+10) < base) {
323 result = result*base + value;
324 cp++;
325 }
326 if (endp)
327 *endp = (char *)cp;
328 return result;
329}
330
331long simple_strtol(const char *cp,char **endp,unsigned int base)
332{
333 if(*cp=='-')
334 return -simple_strtoul(cp+1,endp,base);
335 return simple_strtoul(cp,endp,base);
336}
337
338static int skip_atoi(const char **s)
339{
340 int i=0;
341
342 while (isdigit(**s))
343 i = i*10 + *((*s)++) - '0';
344 return i;
345}
346
347#define ZEROPAD 1 /* pad with zero */
348#define SIGN 2 /* unsigned/signed long */
349#define PLUS 4 /* show plus */
350#define SPACE 8 /* space if plus */
351#define LEFT 16 /* left justified */
352#define SPECIAL 32 /* 0x */
353#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
354
355static char * number(char * str, long num, int base, int size, int precision, int type)
356{
357 char c,sign,tmp[66];
358 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
359 int i;
360
361 if (type & LARGE)
362 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
363 if (type & LEFT)
364 type &= ~ZEROPAD;
365 if (base < 2 || base > 36)
366 return 0;
367 c = (type & ZEROPAD) ? '0' : ' ';
368 sign = 0;
369 if (type & SIGN) {
370 if (num < 0) {
371 sign = '-';
372 num = -num;
373 size--;
374 } else if (type & PLUS) {
375 sign = '+';
376 size--;
377 } else if (type & SPACE) {
378 sign = ' ';
379 size--;
380 }
381 }
382 if (type & SPECIAL) {
383 if (base == 16)
384 size -= 2;
385 else if (base == 8)
386 size--;
387 }
388 i = 0;
389 if (num == 0)
390 tmp[i++]='0';
391 else while (num != 0) {
392 tmp[i++] = digits[num % base];
393 num /= base;
394 }
395 if (i > precision)
396 precision = i;
397 size -= precision;
398 if (!(type&(ZEROPAD+LEFT)))
399 while(size-->0)
400 *str++ = ' ';
401 if (sign)
402 *str++ = sign;
403 if (type & SPECIAL) {
404 if (base==8)
405 *str++ = '0';
406 else if (base==16) {
407 *str++ = '0';
408 *str++ = digits[33];
409 }
410 }
411 if (!(type & LEFT))
412 while (size-- > 0)
413 *str++ = c;
414 while (i < precision--)
415 *str++ = '0';
416 while (i-- > 0)
417 *str++ = tmp[i];
418 while (size-- > 0)
419 *str++ = ' ';
420 return str;
421}
422
423/* Forward decl. needed for IP address printing stuff... */
424int sprintf(char * buf, const char *fmt, ...);
425
426int vsprintf(char *buf, const char *fmt, va_list args)
427{
428 int len;
429 unsigned long num;
430 int i, base;
431 char * str;
432 const char *s;
433
434 int flags; /* flags to number() */
435
436 int field_width; /* width of output field */
437 int precision; /* min. # of digits for integers; max
438 number of chars for from string */
439 int qualifier; /* 'h', 'l', or 'L' for integer fields */
440 /* 'z' support added 23/7/1999 S.H. */
441 /* 'z' changed to 'Z' --davidm 1/25/99 */
442
443
444 for (str=buf ; *fmt ; ++fmt) {
445 if (*fmt != '%') {
446 *str++ = *fmt;
447 continue;
448 }
449
450 /* process flags */
451 flags = 0;
452 repeat:
453 ++fmt; /* this also skips first '%' */
454 switch (*fmt) {
455 case '-': flags |= LEFT; goto repeat;
456 case '+': flags |= PLUS; goto repeat;
457 case ' ': flags |= SPACE; goto repeat;
458 case '#': flags |= SPECIAL; goto repeat;
459 case '0': flags |= ZEROPAD; goto repeat;
460 }
461
462 /* get field width */
463 field_width = -1;
464 if (isdigit(*fmt))
465 field_width = skip_atoi(&fmt);
466 else if (*fmt == '*') {
467 ++fmt;
468 /* it's the next argument */
469 field_width = va_arg(args, int);
470 if (field_width < 0) {
471 field_width = -field_width;
472 flags |= LEFT;
473 }
474 }
475
476 /* get the precision */
477 precision = -1;
478 if (*fmt == '.') {
479 ++fmt;
480 if (isdigit(*fmt))
481 precision = skip_atoi(&fmt);
482 else if (*fmt == '*') {
483 ++fmt;
484 /* it's the next argument */
485 precision = va_arg(args, int);
486 }
487 if (precision < 0)
488 precision = 0;
489 }
490
491 /* get the conversion qualifier */
492 qualifier = -1;
493 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || *fmt =='Z') {
494 qualifier = *fmt;
495 ++fmt;
496 }
497
498 /* default base */
499 base = 10;
500
501 switch (*fmt) {
502 case 'c':
503 if (!(flags & LEFT))
504 while (--field_width > 0)
505 *str++ = ' ';
506 *str++ = (unsigned char) va_arg(args, int);
507 while (--field_width > 0)
508 *str++ = ' ';
509 continue;
510
511 case 's':
512 s = va_arg(args, char *);
513 if (!s)
514 s = "<NULL>";
515
516 len = strnlen(s, precision);
517
518 if (!(flags & LEFT))
519 while (len < field_width--)
520 *str++ = ' ';
521 for (i = 0; i < len; ++i)
522 *str++ = *s++;
523 while (len < field_width--)
524 *str++ = ' ';
525 continue;
526
527 case 'p':
528 if (field_width == -1) {
529 field_width = 2*sizeof(void *);
530 flags |= ZEROPAD;
531 }
532 str = number(str,
533 (unsigned long) va_arg(args, void *), 16,
534 field_width, precision, flags);
535 continue;
536
537
538 case 'n':
539 if (qualifier == 'l') {
540 long * ip = va_arg(args, long *);
541 *ip = (str - buf);
542 } else if (qualifier == 'Z') {
543 size_t * ip = va_arg(args, size_t *);
544 *ip = (str - buf);
545 } else {
546 int * ip = va_arg(args, int *);
547 *ip = (str - buf);
548 }
549 continue;
550
551 case '%':
552 *str++ = '%';
553 continue;
554
555 /* integer number formats - set up the flags and "break" */
556 case 'o':
557 base = 8;
558 break;
559
560 case 'X':
561 flags |= LARGE;
562 case 'x':
563 base = 16;
564 break;
565
566 case 'd':
567 case 'i':
568 flags |= SIGN;
569 case 'u':
570 break;
571
572 default:
573 *str++ = '%';
574 if (*fmt)
575 *str++ = *fmt;
576 else
577 --fmt;
578 continue;
579 }
580 if (qualifier == 'l') {
581 num = va_arg(args, unsigned long);
582 if (flags & SIGN)
583 num = (signed long) num;
584 } else if (qualifier == 'Z') {
585 num = va_arg(args, size_t);
586 } else if (qualifier == 'h') {
587 num = (unsigned short) va_arg(args, int);
588 if (flags & SIGN)
589 num = (signed short) num;
590 } else {
591 num = va_arg(args, unsigned int);
592 if (flags & SIGN)
593 num = (signed int) num;
594 }
595 str = number(str, num, base, field_width, precision, flags);
596 }
597 *str = '\0';
598 return str-buf;
599}
600
601int sprintf(char * buf, const char *fmt, ...)
602{
603 va_list args;
604 int i;
605
606 va_start(args, fmt);
607 i=vsprintf(buf,fmt,args);
608 va_end(args);
609 return i;
610}
611
612static char sprint_buf[1024];
613
614void
615printk(char *fmt, ...)
616{
617 va_list args;
618 int n;
619
620 va_start(args, fmt);
621 n = vsprintf(sprint_buf, fmt, args);
622 va_end(args);
623 write(stdout, sprint_buf, n);
624}
625
626int
627printf(char *fmt, ...)
628{
629 va_list args;
630 int n;
631
632 va_start(args, fmt);
633 n = vsprintf(sprint_buf, fmt, args);
634 va_end(args);
635 write(stdout, sprint_buf, n);
636 return n;
637}
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