git.oblomov.eu Git - linux-2.6/blob - arch/ppc/boot/common/misc-common.c

   1 /*
   2  * Misc. bootloader code (almost) all platforms can use
   3  *
   4  * Author: Johnnie Peters <jpeters@mvista.com>
   5  * Editor: Tom Rini <trini@mvista.com>
   6  *
   7  * Derived from arch/ppc/boot/prep/misc.c
   8  *
   9  * 2000-2001 (c) MontaVista, Software, Inc.  This file is licensed under
  10  * the terms of the GNU General Public License version 2.  This program
  11  * is licensed "as is" without any warranty of any kind, whether express
  12  * or implied.
  13  */
  14
  15 #include <stdarg.h>     /* for va_ bits */
  16 #include <linux/config.h>
  17 #include <linux/string.h>
  18 #include <linux/zlib.h>
  19 #include "nonstdio.h"
  20
  21 /* If we're on a PReP, assume we have a keyboard controller
  22  * Also note, if we're not PReP, we assume you are a serial
  23  * console - Tom */
  24 #if defined(CONFIG_PPC_PREP) && defined(CONFIG_VGA_CONSOLE)
  25 extern void cursor(int x, int y);
  26 extern void scroll(void);
  27 extern char *vidmem;
  28 extern int lines, cols;
  29 extern int orig_x, orig_y;
  30 extern int keyb_present;
  31 extern int CRT_tstc(void);
  32 extern int CRT_getc(void);
  33 #else
  34 int cursor(int x, int y) {return 0;}
  35 void scroll(void) {}
  36 char vidmem[1];
  37 #define lines 0
  38 #define cols 0
  39 int orig_x = 0;
  40 int orig_y = 0;
  41 #define keyb_present 0
  42 int CRT_tstc(void) {return 0;}
  43 int CRT_getc(void) {return 0;}
  44 #endif
  45
  46 extern char *avail_ram;
  47 extern char *end_avail;
  48 extern char _end[];
  49
  50 void puts(const char *);
  51 void putc(const char c);
  52 void puthex(unsigned long val);
  53 void gunzip(void *, int, unsigned char *, int *);
  54 static int _cvt(unsigned long val, char *buf, long radix, char *digits);
  55
  56 void _vprintk(void(*putc)(const char), const char *fmt0, va_list ap);
  57 unsigned char *ISA_io = NULL;
  58
  59 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
  60         || defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
  61         || defined(CONFIG_SERIAL_MPSC_CONSOLE)
  62 extern unsigned long com_port;
  63
  64 extern int serial_tstc(unsigned long com_port);
  65 extern unsigned char serial_getc(unsigned long com_port);
  66 extern void serial_putc(unsigned long com_port, unsigned char c);
  67 #endif
  68
  69 void pause(void)
  70 {
  71         puts("pause\n");
  72 }
  73
  74 void exit(void)
  75 {
  76         puts("exit\n");
  77         while(1);
  78 }
  79
  80 int tstc(void)
  81 {
  82 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
  83         || defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
  84         || defined(CONFIG_SERIAL_MPSC_CONSOLE)
  85         if(keyb_present)
  86                 return (CRT_tstc() || serial_tstc(com_port));
  87         else
  88                 return (serial_tstc(com_port));
  89 #else
  90         return CRT_tstc();
  91 #endif
  92 }
  93
  94 int getc(void)
  95 {
  96         while (1) {
  97 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
  98         || defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
  99         || defined(CONFIG_SERIAL_MPSC_CONSOLE)
 100                 if (serial_tstc(com_port))
 101                         return (serial_getc(com_port));
 102 #endif /* serial console */
 103                 if (keyb_present)
 104                         if(CRT_tstc())
 105                                 return (CRT_getc());
 106         }
 107 }
 108
 109 void
 110 putc(const char c)
 111 {
 112         int x,y;
 113
 114 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
 115         || defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
 116         || defined(CONFIG_SERIAL_MPSC_CONSOLE)
 117         serial_putc(com_port, c);
 118         if ( c == '\n' )
 119                 serial_putc(com_port, '\r');
 120 #endif /* serial console */
 121
 122         x = orig_x;
 123         y = orig_y;
 124
 125         if ( c == '\n' ) {
 126                 x = 0;
 127                 if ( ++y >= lines ) {
 128                         scroll();
 129                         y--;
 130                 }
 131         } else if (c == '\r') {
 132                 x = 0;
 133         } else if (c == '\b') {
 134                 if (x > 0) {
 135                         x--;
 136                 }
 137         } else {
 138                 vidmem [ ( x + cols * y ) * 2 ] = c;
 139                 if ( ++x >= cols ) {
 140                         x = 0;
 141                         if ( ++y >= lines ) {
 142                                 scroll();
 143                                 y--;
 144                         }
 145                 }
 146         }
 147
 148         cursor(x, y);
 149
 150         orig_x = x;
 151         orig_y = y;
 152 }
 153
 154 void puts(const char *s)
 155 {
 156         int x,y;
 157         char c;
 158
 159         x = orig_x;
 160         y = orig_y;
 161
 162         while ( ( c = *s++ ) != '\0' ) {
 163 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
 164         || defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
 165         || defined(CONFIG_SERIAL_MPSC_CONSOLE)
 166                 serial_putc(com_port, c);
 167                 if ( c == '\n' ) serial_putc(com_port, '\r');
 168 #endif /* serial console */
 169
 170                 if ( c == '\n' ) {
 171                         x = 0;
 172                         if ( ++y >= lines ) {
 173                                 scroll();
 174                                 y--;
 175                         }
 176                 } else if (c == '\b') {
 177                   if (x > 0) {
 178                     x--;
 179                   }
 180                 } else {
 181                         vidmem [ ( x + cols * y ) * 2 ] = c;
 182                         if ( ++x >= cols ) {
 183                                 x = 0;
 184                                 if ( ++y >= lines ) {
 185                                         scroll();
 186                                         y--;
 187                                 }
 188                         }
 189                 }
 190         }
 191
 192         cursor(x, y);
 193
 194         orig_x = x;
 195         orig_y = y;
 196 }
 197
 198 void error(char *x)
 199 {
 200         puts("\n\n");
 201         puts(x);
 202         puts("\n\n -- System halted");
 203
 204         while(1);       /* Halt */
 205 }
 206
 207 static void *zalloc(unsigned size)
 208 {
 209         void *p = avail_ram;
 210
 211         size = (size + 7) & -8;
 212         avail_ram += size;
 213         if (avail_ram > end_avail) {
 214                 puts("oops... out of memory\n");
 215                 pause();
 216         }
 217         return p;
 218 }
 219
 220 #define HEAD_CRC        2
 221 #define EXTRA_FIELD     4
 222 #define ORIG_NAME       8
 223 #define COMMENT         0x10
 224 #define RESERVED        0xe0
 225
 226 void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
 227 {
 228         z_stream s;
 229         int r, i, flags;
 230
 231         /* skip header */
 232         i = 10;
 233         flags = src[3];
 234         if (src[2] != Z_DEFLATED || (flags & RESERVED) != 0) {
 235                 puts("bad gzipped data\n");
 236                 exit();
 237         }
 238         if ((flags & EXTRA_FIELD) != 0)
 239                 i = 12 + src[10] + (src[11] << 8);
 240         if ((flags & ORIG_NAME) != 0)
 241                 while (src[i++] != 0)
 242                         ;
 243         if ((flags & COMMENT) != 0)
 244                 while (src[i++] != 0)
 245                         ;
 246         if ((flags & HEAD_CRC) != 0)
 247                 i += 2;
 248         if (i >= *lenp) {
 249                 puts("gunzip: ran out of data in header\n");
 250                 exit();
 251         }
 252
 253         /* Initialize ourself. */
 254         s.workspace = zalloc(zlib_inflate_workspacesize());
 255         r = zlib_inflateInit2(&s, -MAX_WBITS);
 256         if (r != Z_OK) {
 257                 puts("zlib_inflateInit2 returned "); puthex(r); puts("\n");
 258                 exit();
 259         }
 260         s.next_in = src + i;
 261         s.avail_in = *lenp - i;
 262         s.next_out = dst;
 263         s.avail_out = dstlen;
 264         r = zlib_inflate(&s, Z_FINISH);
 265         if (r != Z_OK && r != Z_STREAM_END) {
 266                 puts("inflate returned "); puthex(r); puts("\n");
 267                 exit();
 268         }
 269         *lenp = s.next_out - (unsigned char *) dst;
 270         zlib_inflateEnd(&s);
 271 }
 272
 273 void
 274 puthex(unsigned long val)
 275 {
 276
 277         unsigned char buf[10];
 278         int i;
 279         for (i = 7;  i >= 0;  i--)
 280         {
 281                 buf[i] = "0123456789ABCDEF"[val & 0x0F];
 282                 val >>= 4;
 283         }
 284         buf[8] = '\0';
 285         puts(buf);
 286 }
 287
 288 #define FALSE 0
 289 #define TRUE  1
 290
 291 void
 292 _printk(char const *fmt, ...)
 293 {
 294         va_list ap;
 295
 296         va_start(ap, fmt);
 297         _vprintk(putc, fmt, ap);
 298         va_end(ap);
 299         return;
 300 }
 301
 302 #define is_digit(c) ((c >= '0') && (c <= '9'))
 303
 304 void
 305 _vprintk(void(*putc)(const char), const char *fmt0, va_list ap)
 306 {
 307         char c, sign, *cp = 0;
 308         int left_prec, right_prec, zero_fill, length = 0, pad, pad_on_right;
 309         char buf[32];
 310         long val;
 311         while ((c = *fmt0++))
 312         {
 313                 if (c == '%')
 314                 {
 315                         c = *fmt0++;
 316                         left_prec = right_prec = pad_on_right = 0;
 317                         if (c == '-')
 318                         {
 319                                 c = *fmt0++;
 320                                 pad_on_right++;
 321                         }
 322                         if (c == '0')
 323                         {
 324                                 zero_fill = TRUE;
 325                                 c = *fmt0++;
 326                         } else
 327                         {
 328                                 zero_fill = FALSE;
 329                         }
 330                         while (is_digit(c))
 331                         {
 332                                 left_prec = (left_prec * 10) + (c - '0');
 333                                 c = *fmt0++;
 334                         }
 335                         if (c == '.')
 336                         {
 337                                 c = *fmt0++;
 338                                 zero_fill++;
 339                                 while (is_digit(c))
 340                                 {
 341                                         right_prec = (right_prec * 10) + (c - '0');
 342                                         c = *fmt0++;
 343                                 }
 344                         } else
 345                         {
 346                                 right_prec = left_prec;
 347                         }
 348                         sign = '\0';
 349                         switch (c)
 350                         {
 351                         case 'd':
 352                         case 'x':
 353                         case 'X':
 354                                 val = va_arg(ap, long);
 355                                 switch (c)
 356                                 {
 357                                 case 'd':
 358                                         if (val < 0)
 359                                         {
 360                                                 sign = '-';
 361                                                 val = -val;
 362                                         }
 363                                         length = _cvt(val, buf, 10, "0123456789");
 364                                         break;
 365                                 case 'x':
 366                                         length = _cvt(val, buf, 16, "0123456789abcdef");
 367                                         break;
 368                                 case 'X':
 369                                         length = _cvt(val, buf, 16, "0123456789ABCDEF");
 370                                         break;
 371                                 }
 372                                 cp = buf;
 373                                 break;
 374                         case 's':
 375                                 cp = va_arg(ap, char *);
 376                                 length = strlen(cp);
 377                                 break;
 378                         case 'c':
 379                                 c = va_arg(ap, long /*char*/);
 380                                 (*putc)(c);
 381                                 continue;
 382                         default:
 383                                 (*putc)('?');
 384                         }
 385                         pad = left_prec - length;
 386                         if (sign != '\0')
 387                         {
 388                                 pad--;
 389                         }
 390                         if (zero_fill)
 391                         {
 392                                 c = '0';
 393                                 if (sign != '\0')
 394                                 {
 395                                         (*putc)(sign);
 396                                         sign = '\0';
 397                                 }
 398                         } else
 399                         {
 400                                 c = ' ';
 401                         }
 402                         if (!pad_on_right)
 403                         {
 404                                 while (pad-- > 0)
 405                                 {
 406                                         (*putc)(c);
 407                                 }
 408                         }
 409                         if (sign != '\0')
 410                         {
 411                                 (*putc)(sign);
 412                         }
 413                         while (length-- > 0)
 414                         {
 415                                 (*putc)(c = *cp++);
 416                                 if (c == '\n')
 417                                 {
 418                                         (*putc)('\r');
 419                                 }
 420                         }
 421                         if (pad_on_right)
 422                         {
 423                                 while (pad-- > 0)
 424                                 {
 425                                         (*putc)(c);
 426                                 }
 427                         }
 428                 } else
 429                 {
 430                         (*putc)(c);
 431                         if (c == '\n')
 432                         {
 433                                 (*putc)('\r');
 434                         }
 435                 }
 436         }
 437 }
 438
 439 int
 440 _cvt(unsigned long val, char *buf, long radix, char *digits)
 441 {
 442         char temp[80];
 443         char *cp = temp;
 444         int length = 0;
 445         if (val == 0)
 446         { /* Special case */
 447                 *cp++ = '0';
 448         } else
 449                 while (val)
 450                 {
 451                         *cp++ = digits[val % radix];
 452                         val /= radix;
 453                 }
 454         while (cp != temp)
 455         {
 456                 *buf++ = *--cp;
 457                 length++;
 458         }
 459         *buf = '\0';
 460         return (length);
 461 }
 462
 463 void
 464 _dump_buf_with_offset(unsigned char *p, int s, unsigned char *base)
 465 {
 466         int i, c;
 467         if ((unsigned int)s > (unsigned int)p)
 468         {
 469                 s = (unsigned int)s - (unsigned int)p;
 470         }
 471         while (s > 0)
 472         {
 473                 if (base)
 474                 {
 475                         _printk("%06X: ", (int)p - (int)base);
 476                 } else
 477                 {
 478                         _printk("%06X: ", p);
 479                 }
 480                 for (i = 0;  i < 16;  i++)
 481                 {
 482                         if (i < s)
 483                         {
 484                                 _printk("%02X", p[i] & 0xFF);
 485                         } else
 486                         {
 487                                 _printk("  ");
 488                         }
 489                         if ((i % 2) == 1) _printk(" ");
 490                         if ((i % 8) == 7) _printk(" ");
 491                 }
 492                 _printk(" |");
 493                 for (i = 0;  i < 16;  i++)
 494                 {
 495                         if (i < s)
 496                         {
 497                                 c = p[i] & 0xFF;
 498                                 if ((c < 0x20) || (c >= 0x7F)) c = '.';
 499                         } else
 500                         {
 501                                 c = ' ';
 502                         }
 503                         _printk("%c", c);
 504                 }
 505                 _printk("|\n");
 506                 s -= 16;
 507                 p += 16;
 508         }
 509 }
 510
 511 void
 512 _dump_buf(unsigned char *p, int s)
 513 {
 514         _printk("\n");
 515         _dump_buf_with_offset(p, s, 0);
 516 }
 517
 518 /* Very simple inb/outb routines.  We declare ISA_io to be 0 above, and
 519  * then modify it on platforms which need to.  We do it like this
 520  * because on some platforms we give inb/outb an exact location, and
 521  * on others it's an offset from a given location. -- Tom
 522  */
 523
 524 void ISA_init(unsigned long base)
 525 {
 526         ISA_io = (unsigned char *)base;
 527 }
 528
 529 void
 530 outb(int port, unsigned char val)
 531 {
 532         /* Ensure I/O operations complete */
 533         __asm__ volatile("eieio");
 534         ISA_io[port] = val;
 535 }
 536
 537 unsigned char
 538 inb(int port)
 539 {
 540         /* Ensure I/O operations complete */
 541         __asm__ volatile("eieio");
 542         return (ISA_io[port]);
 543 }
 544
 545 /*
 546  * Local variables:
 547  *  c-indent-level: 8
 548  *  c-basic-offset: 8
 549  *  tab-width: 8
 550  * End:
 551  */