arch/ppc/boot/common/misc-common.c

   1 /*
   2  * arch/ppc/boot/common/misc-common.c
   3  *
   4  * Misc. bootloader code (almost) all platforms can use
   5  *
   6  * Author: Johnnie Peters <jpeters@mvista.com>
   7  * Editor: Tom Rini <trini@mvista.com>
   8  *
   9  * Derived from arch/ppc/boot/prep/misc.c
  10  *
  11  * 2000-2001 (c) MontaVista, Software, Inc.  This file is licensed under
  12  * the terms of the GNU General Public License version 2.  This program
  13  * is licensed "as is" without any warranty of any kind, whether express
  14  * or implied.
  15  */
  16
  17 #include <stdarg.h>     /* for va_ bits */
  18 #include <linux/config.h>
  19 #include <linux/string.h>
  20 #include <linux/zlib.h>
  21 #include "nonstdio.h"
  22
  23 /* If we're on a PReP, assume we have a keyboard controller
  24  * Also note, if we're not PReP, we assume you are a serial
  25  * console - Tom */
  26 #if defined(CONFIG_PPC_PREP) && defined(CONFIG_VGA_CONSOLE)
  27 extern void cursor(int x, int y);
  28 extern void scroll(void);
  29 extern char *vidmem;
  30 extern int lines, cols;
  31 extern int orig_x, orig_y;
  32 extern int keyb_present;
  33 extern int CRT_tstc(void);
  34 extern int CRT_getc(void);
  35 #else
  36 int cursor(int x, int y) {return 0;}
  37 void scroll(void) {}
  38 char vidmem[1];
  39 #define lines 0
  40 #define cols 0
  41 int orig_x = 0;
  42 int orig_y = 0;
  43 #define keyb_present 0
  44 int CRT_tstc(void) {return 0;}
  45 int CRT_getc(void) {return 0;}
  46 #endif
  47
  48 extern char *avail_ram;
  49 extern char *end_avail;
  50 extern char _end[];
  51
  52 void puts(const char *);
  53 void putc(const char c);
  54 void puthex(unsigned long val);
  55 void _bcopy(char *src, char *dst, int len);
  56 void gunzip(void *, int, unsigned char *, int *);
  57 static int _cvt(unsigned long val, char *buf, long radix, char *digits);
  58
  59 void _vprintk(void(*putc)(const char), const char *fmt0, va_list ap);
  60 unsigned char *ISA_io = NULL;
  61
  62 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
  63         || defined(CONFIG_SERIAL_MPC52xx_CONSOLE)
  64 extern unsigned long com_port;
  65
  66 extern int serial_tstc(unsigned long com_port);
  67 extern unsigned char serial_getc(unsigned long com_port);
  68 extern void serial_putc(unsigned long com_port, unsigned char c);
  69 #endif
  70
  71 void pause(void)
  72 {
  73         puts("pause\n");
  74 }
  75
  76 void exit(void)
  77 {
  78         puts("exit\n");
  79         while(1);
  80 }
  81
  82 int tstc(void)
  83 {
  84 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
  85         || defined(CONFIG_SERIAL_MPC52xx_CONSOLE)
  86         if(keyb_present)
  87                 return (CRT_tstc() || serial_tstc(com_port));
  88         else
  89                 return (serial_tstc(com_port));
  90 #else
  91         return CRT_tstc();
  92 #endif
  93 }
  94
  95 int getc(void)
  96 {
  97         while (1) {
  98 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
  99         || defined(CONFIG_SERIAL_MPC52xx_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         serial_putc(com_port, c);
 117         if ( c == '\n' )
 118                 serial_putc(com_port, '\r');
 119 #endif /* serial console */
 120
 121         x = orig_x;
 122         y = orig_y;
 123
 124         if ( c == '\n' ) {
 125                 x = 0;
 126                 if ( ++y >= lines ) {
 127                         scroll();
 128                         y--;
 129                 }
 130         } else if (c == '\r') {
 131                 x = 0;
 132         } else if (c == '\b') {
 133                 if (x > 0) {
 134                         x--;
 135                 }
 136         } else {
 137                 vidmem [ ( x + cols * y ) * 2 ] = c;
 138                 if ( ++x >= cols ) {
 139                         x = 0;
 140                         if ( ++y >= lines ) {
 141                                 scroll();
 142                                 y--;
 143                         }
 144                 }
 145         }
 146
 147         cursor(x, y);
 148
 149         orig_x = x;
 150         orig_y = y;
 151 }
 152
 153 void puts(const char *s)
 154 {
 155         int x,y;
 156         char c;
 157
 158         x = orig_x;
 159         y = orig_y;
 160
 161         while ( ( c = *s++ ) != '\0' ) {
 162 #if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
 163         || defined(CONFIG_SERIAL_MPC52xx_CONSOLE)
 164                 serial_putc(com_port, c);
 165                 if ( c == '\n' ) serial_putc(com_port, '\r');
 166 #endif /* serial console */
 167
 168                 if ( c == '\n' ) {
 169                         x = 0;
 170                         if ( ++y >= lines ) {
 171                                 scroll();
 172                                 y--;
 173                         }
 174                 } else if (c == '\b') {
 175                   if (x > 0) {
 176                     x--;
 177                   }
 178                 } else {
 179                         vidmem [ ( x + cols * y ) * 2 ] = c;
 180                         if ( ++x >= cols ) {
 181                                 x = 0;
 182                                 if ( ++y >= lines ) {
 183                                         scroll();
 184                                         y--;
 185                                 }
 186                         }
 187                 }
 188         }
 189
 190         cursor(x, y);
 191
 192         orig_x = x;
 193         orig_y = y;
 194 }
 195
 196 void error(char *x)
 197 {
 198         puts("\n\n");
 199         puts(x);
 200         puts("\n\n -- System halted");
 201
 202         while(1);       /* Halt */
 203 }
 204
 205 static void *zalloc(unsigned size)
 206 {
 207         void *p = avail_ram;
 208
 209         size = (size + 7) & -8;
 210         avail_ram += size;
 211         if (avail_ram > end_avail) {
 212                 puts("oops... out of memory\n");
 213                 pause();
 214         }
 215         return p;
 216 }
 217
 218 #define HEAD_CRC        2
 219 #define EXTRA_FIELD     4
 220 #define ORIG_NAME       8
 221 #define COMMENT         0x10
 222 #define RESERVED        0xe0
 223
 224 void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
 225 {
 226         z_stream s;
 227         int r, i, flags;
 228
 229         /* skip header */
 230         i = 10;
 231         flags = src[3];
 232         if (src[2] != Z_DEFLATED || (flags & RESERVED) != 0) {
 233                 puts("bad gzipped data\n");
 234                 exit();
 235         }
 236         if ((flags & EXTRA_FIELD) != 0)
 237                 i = 12 + src[10] + (src[11] << 8);
 238         if ((flags & ORIG_NAME) != 0)
 239                 while (src[i++] != 0)
 240                         ;
 241         if ((flags & COMMENT) != 0)
 242                 while (src[i++] != 0)
 243                         ;
 244         if ((flags & HEAD_CRC) != 0)
 245                 i += 2;
 246         if (i >= *lenp) {
 247                 puts("gunzip: ran out of data in header\n");
 248                 exit();
 249         }
 250
 251         /* Initialize ourself. */
 252         s.workspace = zalloc(zlib_inflate_workspacesize());
 253         r = zlib_inflateInit2(&s, -MAX_WBITS);
 254         if (r != Z_OK) {
 255                 puts("zlib_inflateInit2 returned "); puthex(r); puts("\n");
 256                 exit();
 257         }
 258         s.next_in = src + i;
 259         s.avail_in = *lenp - i;
 260         s.next_out = dst;
 261         s.avail_out = dstlen;
 262         r = zlib_inflate(&s, Z_FINISH);
 263         if (r != Z_OK && r != Z_STREAM_END) {
 264                 puts("inflate returned "); puthex(r); puts("\n");
 265                 exit();
 266         }
 267         *lenp = s.next_out - (unsigned char *) dst;
 268         zlib_inflateEnd(&s);
 269 }
 270
 271 void
 272 puthex(unsigned long val)
 273 {
 274
 275         unsigned char buf[10];
 276         int i;
 277         for (i = 7;  i >= 0;  i--)
 278         {
 279                 buf[i] = "0123456789ABCDEF"[val & 0x0F];
 280                 val >>= 4;
 281         }
 282         buf[8] = '\0';
 283         puts(buf);
 284 }
 285
 286 #define FALSE 0
 287 #define TRUE  1
 288
 289 void
 290 _printk(char const *fmt, ...)
 291 {
 292         va_list ap;
 293
 294         va_start(ap, fmt);
 295         _vprintk(putc, fmt, ap);
 296         va_end(ap);
 297         return;
 298 }
 299
 300 #define is_digit(c) ((c >= '0') && (c <= '9'))
 301
 302 void
 303 _vprintk(void(*putc)(const char), const char *fmt0, va_list ap)
 304 {
 305         char c, sign, *cp = 0;
 306         int left_prec, right_prec, zero_fill, length = 0, pad, pad_on_right;
 307         char buf[32];
 308         long val;
 309         while ((c = *fmt0++))
 310         {
 311                 if (c == '%')
 312                 {
 313                         c = *fmt0++;
 314                         left_prec = right_prec = pad_on_right = 0;
 315                         if (c == '-')
 316                         {
 317                                 c = *fmt0++;
 318                                 pad_on_right++;
 319                         }
 320                         if (c == '0')
 321                         {
 322                                 zero_fill = TRUE;
 323                                 c = *fmt0++;
 324                         } else
 325                         {
 326                                 zero_fill = FALSE;
 327                         }
 328                         while (is_digit(c))
 329                         {
 330                                 left_prec = (left_prec * 10) + (c - '0');
 331                                 c = *fmt0++;
 332                         }
 333                         if (c == '.')
 334                         {
 335                                 c = *fmt0++;
 336                                 zero_fill++;
 337                                 while (is_digit(c))
 338                                 {
 339                                         right_prec = (right_prec * 10) + (c - '0');
 340                                         c = *fmt0++;
 341                                 }
 342                         } else
 343                         {
 344                                 right_prec = left_prec;
 345                         }
 346                         sign = '\0';
 347                         switch (c)
 348                         {
 349                         case 'd':
 350                         case 'x':
 351                         case 'X':
 352                                 val = va_arg(ap, long);
 353                                 switch (c)
 354                                 {
 355                                 case 'd':
 356                                         if (val < 0)
 357                                         {
 358                                                 sign = '-';
 359                                                 val = -val;
 360                                         }
 361                                         length = _cvt(val, buf, 10, "0123456789");
 362                                         break;
 363                                 case 'x':
 364                                         length = _cvt(val, buf, 16, "0123456789abcdef");
 365                                         break;
 366                                 case 'X':
 367                                         length = _cvt(val, buf, 16, "0123456789ABCDEF");
 368                                         break;
 369                                 }
 370                                 cp = buf;
 371                                 break;
 372                         case 's':
 373                                 cp = va_arg(ap, char *);
 374                                 length = strlen(cp);
 375                                 break;
 376                         case 'c':
 377                                 c = va_arg(ap, long /*char*/);
 378                                 (*putc)(c);
 379                                 continue;
 380                         default:
 381                                 (*putc)('?');
 382                         }
 383                         pad = left_prec - length;
 384                         if (sign != '\0')
 385                         {
 386                                 pad--;
 387                         }
 388                         if (zero_fill)
 389                         {
 390                                 c = '0';
 391                                 if (sign != '\0')
 392                                 {
 393                                         (*putc)(sign);
 394                                         sign = '\0';
 395                                 }
 396                         } else
 397                         {
 398                                 c = ' ';
 399                         }
 400                         if (!pad_on_right)
 401                         {
 402                                 while (pad-- > 0)
 403                                 {
 404                                         (*putc)(c);
 405                                 }
 406                         }
 407                         if (sign != '\0')
 408                         {
 409                                 (*putc)(sign);
 410                         }
 411                         while (length-- > 0)
 412                         {
 413                                 (*putc)(c = *cp++);
 414                                 if (c == '\n')
 415                                 {
 416                                         (*putc)('\r');
 417                                 }
 418                         }
 419                         if (pad_on_right)
 420                         {
 421                                 while (pad-- > 0)
 422                                 {
 423                                         (*putc)(c);
 424                                 }
 425                         }
 426                 } else
 427                 {
 428                         (*putc)(c);
 429                         if (c == '\n')
 430                         {
 431                                 (*putc)('\r');
 432                         }
 433                 }
 434         }
 435 }
 436
 437 int
 438 _cvt(unsigned long val, char *buf, long radix, char *digits)
 439 {
 440         char temp[80];
 441         char *cp = temp;
 442         int length = 0;
 443         if (val == 0)
 444         { /* Special case */
 445                 *cp++ = '0';
 446         } else
 447                 while (val)
 448                 {
 449                         *cp++ = digits[val % radix];
 450                         val /= radix;
 451                 }
 452         while (cp != temp)
 453         {
 454                 *buf++ = *--cp;
 455                 length++;
 456         }
 457         *buf = '\0';
 458         return (length);
 459 }
 460
 461 void
 462 _dump_buf_with_offset(unsigned char *p, int s, unsigned char *base)
 463 {
 464         int i, c;
 465         if ((unsigned int)s > (unsigned int)p)
 466         {
 467                 s = (unsigned int)s - (unsigned int)p;
 468         }
 469         while (s > 0)
 470         {
 471                 if (base)
 472                 {
 473                         _printk("%06X: ", (int)p - (int)base);
 474                 } else
 475                 {
 476                         _printk("%06X: ", p);
 477                 }
 478                 for (i = 0;  i < 16;  i++)
 479                 {
 480                         if (i < s)
 481                         {
 482                                 _printk("%02X", p[i] & 0xFF);
 483                         } else
 484                         {
 485                                 _printk("  ");
 486                         }
 487                         if ((i % 2) == 1) _printk(" ");
 488                         if ((i % 8) == 7) _printk(" ");
 489                 }
 490                 _printk(" |");
 491                 for (i = 0;  i < 16;  i++)
 492                 {
 493                         if (i < s)
 494                         {
 495                                 c = p[i] & 0xFF;
 496                                 if ((c < 0x20) || (c >= 0x7F)) c = '.';
 497                         } else
 498                         {
 499                                 c = ' ';
 500                         }
 501                         _printk("%c", c);
 502                 }
 503                 _printk("|\n");
 504                 s -= 16;
 505                 p += 16;
 506         }
 507 }
 508
 509 void
 510 _dump_buf(unsigned char *p, int s)
 511 {
 512         _printk("\n");
 513         _dump_buf_with_offset(p, s, 0);
 514 }
 515
 516 /* Very simple inb/outb routines.  We declare ISA_io to be 0 above, and
 517  * then modify it on platforms which need to.  We do it like this
 518  * because on some platforms we give inb/outb an exact location, and
 519  * on others it's an offset from a given location. -- Tom
 520  */
 521
 522 void ISA_init(unsigned long base)
 523 {
 524         ISA_io = (unsigned char *)base;
 525 }
 526
 527 void
 528 outb(int port, unsigned char val)
 529 {
 530         /* Ensure I/O operations complete */
 531         __asm__ volatile("eieio");
 532         ISA_io[port] = val;
 533 }
 534
 535 unsigned char
 536 inb(int port)
 537 {
 538         /* Ensure I/O operations complete */
 539         __asm__ volatile("eieio");
 540         return (ISA_io[port]);
 541 }
 542
 543 /*
 544  * Local variables:
 545  *  c-indent-level: 8
 546  *  c-basic-offset: 8
 547  *  tab-width: 8
 548  * End:
 549  */