/* LUFA Library Copyright (C) Dean Camera, 2010. dean [at] fourwalledcubicle [dot] com www.fourwalledcubicle.com */ /* Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that the copyright notice and this permission notice and warranty disclaimer appear in supporting documentation, and that the name of the author not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. The author disclaim all warranties with regard to this software, including all implied warranties of merchantability and fitness. In no event shall the author be liable for any special, indirect or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tortious action, arising out of or in connection with the use or performance of this software. */ /* Buffer Configuration: */ /* Buffer length - select static size of created ring buffers: */ #define BUFF_STATICSIZE 128 // Set to the static ring buffer size for all ring buffers (place size after define) /* Volatile mode - uncomment to make buffers volatile, for use in ISRs, etc: */ #define BUFF_VOLATILE // Uncomment to cause all ring buffers to become volatile (and atomic if multi-byte) in access /* Drop mode - select behaviour when Buffer_StoreElement called on a full buffer: */ #define BUFF_DROPOLD // Uncomment to cause full ring buffers to drop the oldest character to make space when full // #define BUFF_DROPNEW // Uncomment to cause full ring buffers to drop the new character when full // #define BUFF_NODROPCHECK // Uncomment to ignore full ring buffer checks - checking left to user! /* Underflow behaviour - select behaviour when Buffer_GetElement is called with an empty ring buffer: */ //#define BUFF_EMPTYRETURNSZERO // Uncomment to return 0 when an empty ring buffer is read #define BUFF_NOEMPTYCHECK // Uncomment to disable checking of empty ring buffers - checking left to user! /* Buffer storage type - set the datatype for the stored data */ #define BUFF_DATATYPE uint8_t // Change to the data type that is going to be stored into the buffer /* Peek routine - uncomment to include the peek routine (fetches next byte without removing it from the buffer */ //#define BUFF_USEPEEK #ifndef _RINGBUFF_H_ #define _RINGBUFF_H_ /* Includes: */ #include #include #include #include #include /* Defines and checks: */ #if defined(BUFF_STATICSIZE) #define BUFF_LENGTH BUFF_STATICSIZE #else #error No buffer length specified! #endif #if !(defined(BUFF_DROPOLD) || defined(BUFF_DROPNEW) || defined(BUFF_NODROPCHECK)) #error No buffer drop mode specified. #endif #if !defined(BUFF_DATATYPE) #error Ringbuffer storage data type not specified. #endif #if defined(BUFF_VOLATILE) #define BUFF_MODE volatile #define BUFF_ATOMIC_BLOCK ATOMIC_BLOCK(ATOMIC_RESTORESTATE) #else #define BUFF_MODE #define BUFF_ATOMIC_BLOCK #endif #if (BUFF_STATICSIZE > LONG_MAX) #define RingBuff_Elements_t uint64_t #elif (BUFF_STATICSIZE > INT_MAX) #define RingBuff_Elements_t uint32_t #elif (BUFF_STATICSIZE > CHAR_MAX) #define RingBuff_Elements_t uint16_t #else #define RingBuff_Elements_t uint8_t #endif /* Type Defines: */ typedef BUFF_DATATYPE RingBuff_Data_t; typedef BUFF_MODE struct { RingBuff_Data_t Buffer[BUFF_LENGTH]; RingBuff_Data_t* InPtr; RingBuff_Data_t* OutPtr; RingBuff_Elements_t Elements; } RingBuff_t; /* Function Prototypes: */ void Buffer_Initialize(RingBuff_t* const Buff); void Buffer_StoreElement(RingBuff_t* const Buffer, RingBuff_Data_t Data); RingBuff_Data_t Buffer_GetElement(RingBuff_t* const Buffer); #if defined(BUFF_USEPEEK) RingBuff_Data_t Buffer_PeekElement(const RingBuff_t* const Buffer); #endif #endif 43'>43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 
/* biossums.c  --- written by Eike W. */

#include <stdlib.h>
#include <stdio.h>

typedef unsigned char byte;

void check( int value, char* message );

#define LEN_BIOS_DATA 0x10000
#define MAX_OFFSET    (LEN_BIOS_DATA - 1)


#define BIOS_OFFSET 0xFFFF

long chksum_bios_get_offset( byte* data, long offset );
byte chksum_bios_calc_value( byte* data, long offset );
byte chksum_bios_get_value(  byte* data, long offset );
void chksum_bios_set_value(  byte* data, long offset, byte value );


#define _32__LEN         9
#define _32__CHKSUM     10

#define _32__MINHDR     16

long chksum__32__get_offset( byte* data, long offset );
byte chksum__32__calc_value( byte* data, long offset );
byte chksum__32__get_value(  byte* data, long offset );
void chksum__32__set_value(  byte* data, long offset, byte value );


#define _MP__LEN         8
#define _MP__CHKSUM     10

#define _MP__MINHDR     16

long chksum__mp__get_offset( byte* data, long offset );
byte chksum__mp__calc_value( byte* data, long offset );
byte chksum__mp__get_value(  byte* data, long offset );
void chksum__mp__set_value(  byte* data, long offset, byte value );


#define PCMP_BASELEN     4
#define PCMP_CHKSUM      7
#define PCMP_EXT_LEN    40
#define PCMP_EXT_CHKSUM 42

#define PCMP_MINHDR     42

long chksum_pcmp_get_offset( byte* data, long offset );
byte chksum_pcmp_calc_value( byte* data, long offset );
byte chksum_pcmp_get_value(  byte* data, long offset );
void chksum_pcmp_set_value(  byte* data, long offset, byte value );


#define _PIR_LEN         6
#define _PIR_CHKSUM     31

#define _PIR_MINHDR     32

long chksum__pir_get_offset( byte *data, long offset );
byte chksum__pir_calc_value( byte* data, long offset );
byte chksum__pir_get_value(  byte* data, long offset );
void chksum__pir_set_value(  byte* data, long offset, byte value );


byte bios_data[LEN_BIOS_DATA];


int main( int argc, char* argv[] ) {

  FILE* stream;
  long  offset, tmp_offset;
  byte  cur_val = 0, new_val = 0;
  int   hits;


  if( argc != 2 ) {
    printf( "Error. Need a file-name as an argument.\n" );
    exit( EXIT_FAILURE );
  }

  if(( stream = fopen( argv[1], "rb" )) == NULL ) {
    printf( "Error opening %s for reading.\n", argv[1] );
    exit( EXIT_FAILURE );
  }
  if( fread( bios_data, 1, LEN_BIOS_DATA, stream ) < LEN_BIOS_DATA ) {
    printf( "Error reading 64KBytes from %s.\n", argv[1] );
    fclose( stream );
    exit( EXIT_FAILURE );
  }
  fclose( stream );

  hits   = 0;
  offset = 0L;
  while( (tmp_offset = chksum__32__get_offset( bios_data, offset )) != -1L ) {
    offset  = tmp_offset;
    cur_val = chksum__32__get_value(  bios_data, offset );
    new_val = chksum__32__calc_value( bios_data, offset );
    printf( "\n\nPCI-Bios header at: 0x%4lX\n", offset  );
    printf( "Current checksum:     0x%02X\n",   cur_val );
    printf( "Calculated checksum:  0x%02X  ",   new_val );
    hits++;
  }
  if( hits == 1 && cur_val != new_val ) {
    printf( "Setting checksum." );
    chksum__32__set_value( bios_data, offset, new_val );
  }
  if( hits >= 2 ) {
    printf( "Multiple PCI headers! No checksum set." );
  }
  if( hits ) {
    printf( "\n" );
  }


  hits   = 0;
  offset = 0L;
  while( (tmp_offset = chksum__mp__get_offset( bios_data, offset )) != -1L ) {
    offset  = tmp_offset;
    cur_val = chksum__mp__get_value(  bios_data, offset );
    new_val = chksum__mp__calc_value( bios_data, offset );
    printf( "\n\nMP header at:       0x%4lX\n", offset  );
    printf( "Current checksum:     0x%02X\n",   cur_val );
    printf( "Calculated checksum:  0x%02X  ",   new_val );
    hits++;
  }
  if( hits == 1 && cur_val != new_val ) {
    printf( "Setting checksum." );
    chksum__mp__set_value( bios_data, offset, new_val );
  }
  if( hits >= 2 ) {
    printf( "Warning! Multiple MP headers. No checksum set." );
  }
  if( hits ) {
    printf( "\n" );
  }


  hits   = 0;
  offset = 0L;
  while( (tmp_offset = chksum_pcmp_get_offset( bios_data, offset )) != -1L ) {
    offset  = tmp_offset;
    cur_val = chksum_pcmp_get_value(  bios_data, offset );
    new_val = chksum_pcmp_calc_value( bios_data, offset );
    printf( "\n\nPCMP header at:     0x%4lX\n", offset  );
    printf( "Current checksum:     0x%02X\n",   cur_val );
    printf( "Calculated checksum:  0x%02X  ",   new_val );
    hits++;
  }
  if( hits == 1 && cur_val != new_val ) {
    printf( "Setting checksum." );
    chksum_pcmp_set_value( bios_data, offset, new_val );
  }
  if( hits >= 2 ) {
    printf( "Warning! Multiple PCMP headers. No checksum set." );
  }
  if( hits ) {
    printf( "\n" );
  }


  hits   = 0;
  offset = 0L;
  while( (tmp_offset = chksum__pir_get_offset( bios_data, offset )) != -1L ) {
    offset  = tmp_offset;
    cur_val = chksum__pir_get_value(  bios_data, offset );
    new_val = chksum__pir_calc_value( bios_data, offset );
    printf( "\n\n$PIR header at:     0x%4lX\n", offset  );
    printf( "Current checksum:     0x%02X\n",   cur_val );
    printf( "Calculated checksum:  0x%02X\n  ",  new_val );
    hits++;
  }
  if( hits == 1 && cur_val != new_val ) {
    printf( "Setting checksum." );
    chksum__pir_set_value( bios_data, offset, new_val );
  }
  if( hits >= 2 ) {
    printf( "Warning! Multiple $PIR headers. No checksum set." );
  }
  if( hits ) {
    printf( "\n" );
  }


  offset  = 0L;
  offset  = chksum_bios_get_offset( bios_data, offset );
  cur_val = chksum_bios_get_value(  bios_data, offset );
  new_val = chksum_bios_calc_value( bios_data, offset );
  printf( "\n\nBios checksum at:   0x%4lX\n", offset  );
  printf( "Current checksum:     0x%02X\n",   cur_val );
  printf( "Calculated checksum:  0x%02X  ",   new_val );
  if( cur_val != new_val ) {
    printf( "Setting checksum." );
    chksum_bios_set_value( bios_data, offset, new_val );
  }
  printf( "\n" );


  if(( stream = fopen( argv[1], "wb" )) == NULL ) {
    printf( "Error opening %s for writing.\n", argv[1] );
    exit( EXIT_FAILURE );
  }
  if( fwrite( bios_data, 1, LEN_BIOS_DATA, stream ) < LEN_BIOS_DATA ) {
    printf( "Error writing 64KBytes to %s.\n", argv[1] );
    fclose( stream );
    exit( EXIT_FAILURE );
  }
  fclose( stream );

  return( EXIT_SUCCESS );
}


void check( int okay, char* message ) {

  if( !okay ) {
    printf( "\n\nError. %s.\n", message );
    exit( EXIT_FAILURE );
  }
}


long chksum_bios_get_offset( byte* data, long offset ) {

  return( BIOS_OFFSET );
}


byte chksum_bios_calc_value( byte* data, long offset ) {

  int   i;
  byte  sum;

  sum = 0;
  for( i = 0; i < MAX_OFFSET; i++ ) {
    sum = sum + *( data + i );
  }
  sum = -sum;          /* iso ensures -s + s == 0 on unsigned types */
  return( sum );
}


byte chksum_bios_get_value( byte* data, long offset ) {

  return( *( data + BIOS_OFFSET ) );
}


void chksum_bios_set_value( byte* data, long offset, byte value ) {

  *( data + BIOS_OFFSET ) = value;
}


byte chksum__32__calc_value( byte* data, long offset ) {

  int           i;
  int           len;
  byte sum;

  check( offset + _32__MINHDR <= MAX_OFFSET, "_32_ header out of bounds" );
  len = *( data + offset + _32__LEN ) << 4;
  check( offset + len <= MAX_OFFSET, "_32_ header-length out of bounds" );
  sum = 0;
  for( i = 0; i < len; i++ ) {
    if( i != _32__CHKSUM ) {
      sum = sum + *( data + offset + i );
    }
  }
  sum = -sum;
  return( sum );
}


long chksum__32__get_offset( byte* data, long offset ) {

  long result = -1L;

  offset = offset + 0x0F;
  offset = offset & ~( 0x0F );
  while( offset + 16 < MAX_OFFSET ) {
    offset = offset + 16;
    if( *( data + offset + 0 ) == '_' && \
        *( data + offset + 1 ) == '3' && \
        *( data + offset + 2 ) == '2' && \
        *( data + offset + 3 ) == '_' ) {
      result = offset;
      break;
    }
  }
  return( result );
}


byte chksum__32__get_value( byte* data, long offset ) {

  check( offset + _32__CHKSUM <= MAX_OFFSET, "PCI-Bios checksum out of bounds" );
  return(  *( data + offset + _32__CHKSUM ) );
}


void chksum__32__set_value( byte* data, long offset, byte value ) {

  check( offset + _32__CHKSUM <= MAX_OFFSET, "PCI-Bios checksum out of bounds" );
  *( data + offset + _32__CHKSUM ) = value;
}


byte chksum__mp__calc_value( byte* data, long offset ) {

  int   i;
  int   len;
  byte  sum;

  check( offset + _MP__MINHDR <= MAX_OFFSET, "_MP_ header out of bounds" );
  len = *( data + offset + _MP__LEN ) << 4;
  check( offset + len <= MAX_OFFSET, "_MP_ header-length out of bounds" );
  sum = 0;
  for( i = 0; i < len; i++ ) {
    if( i != _MP__CHKSUM ) {
      sum = sum + *( data + offset + i );
    }
  }
  sum = -sum;
  return( sum );
}


long chksum__mp__get_offset( byte* data, long offset ) {

  long result = -1L;

  offset = offset + 0x0F;
  offset = offset & ~( 0x0F );
  while( offset + 16 < MAX_OFFSET ) {
    offset = offset + 16;
    if( *( data + offset + 0 ) == '_' && \
        *( data + offset + 1 ) == 'M' && \
        *( data + offset + 2 ) == 'P' && \
        *( data + offset + 3 ) == '_' ) {
      result = offset;
      break;
    }
  }
  return( result );
}


byte chksum__mp__get_value( byte* data, long offset ) {

  check( offset + _MP__CHKSUM <= MAX_OFFSET, "MP checksum out of bounds" );
  return( *( data + offset + _MP__CHKSUM ) );
}


void chksum__mp__set_value( byte* data, long offset, byte value ) {

  check( offset + _MP__CHKSUM <= MAX_OFFSET, "MP checksum out of bounds" );
  *( data + offset + _MP__CHKSUM ) = value;
}


byte chksum_pcmp_calc_value( byte* data, long offset ) {

  int   i;
  int   len;
  byte  sum;

  check( offset + PCMP_MINHDR <= MAX_OFFSET, "PCMP header out of bounds" );
  len  =   *( data + offset + PCMP_BASELEN )      + \
         ( *( data + offset + PCMP_BASELEN + 1 ) << 8 );
  check( offset + len <= MAX_OFFSET, "PCMP header-length out of bounds" );
  if( *( data + offset + PCMP_EXT_LEN )     | \
      *( data + offset + PCMP_EXT_LEN + 1 ) | \
      *( data + offset + PCMP_EXT_CHKSUM ) ) {
    check( 0, "PCMP header indicates extended tables (unsupported)" );
  }
  sum = 0;
  for( i = 0; i < len; i++ ) {
    if( i != PCMP_CHKSUM ) {
      sum = sum + *( data + offset + i );
    }
  }
  sum = -sum;
  return( sum );
}


long chksum_pcmp_get_offset( byte* data, long offset ) {

  long result = -1L;

  offset = offset + 0x0F;
  offset = offset & ~( 0x0F );
  while( offset + 16 < MAX_OFFSET ) {
    offset = offset + 16;
    if( *( data + offset + 0 ) == 'P' && \
        *( data + offset + 1 ) == 'C' && \
        *( data + offset + 2 ) == 'M' && \
        *( data + offset + 3 ) == 'P' ) {
      result = offset;
      break;
    }
  }
  return( result );
}


byte chksum_pcmp_get_value( byte* data, long offset ) {

  check( offset + PCMP_CHKSUM <= MAX_OFFSET, "PCMP checksum out of bounds" );
  return( *( data + offset + PCMP_CHKSUM ) );
}


void chksum_pcmp_set_value( byte* data, long offset, byte value ) {

  check( offset + PCMP_CHKSUM <= MAX_OFFSET, "PCMP checksum out of bounds" );
  *( data + offset + PCMP_CHKSUM ) = value;
}


byte chksum__pir_calc_value( byte* data, long offset ) {

  int   i;
  int   len;
  byte  sum;

  check( offset + _PIR_MINHDR <= MAX_OFFSET, "$PIR header out of bounds" );
  len  =   *( data + offset + _PIR_LEN )      + \
         ( *( data + offset + _PIR_LEN + 1 ) << 8 );
  check( offset + len <= MAX_OFFSET, "$PIR header-length out of bounds" );
  sum = 0;
  for( i = 0; i < len; i++ ) {
    if( i != _PIR_CHKSUM ) {
      sum = sum + *( data + offset + i );
    }
  }
  sum = -sum;
  return( sum );
}


long chksum__pir_get_offset( byte* data, long offset ) {

  long result = -1L;

  offset = offset + 0x0F;
  offset = offset & ~( 0x0F );
  while( offset + 16 < MAX_OFFSET ) {
    offset = offset + 16;
    if( *( data + offset + 0 ) == '$' && \
        *( data + offset + 1 ) == 'P' && \
        *( data + offset + 2 ) == 'I' && \
        *( data + offset + 3 ) == 'R' ) {
      result = offset;
      break;
    }
  }
  return( result );
}


byte chksum__pir_get_value( byte* data, long offset ) {

  check( offset + _PIR_CHKSUM <= MAX_OFFSET, "$PIR checksum out of bounds" );
  return(  *( data + offset + _PIR_CHKSUM ) );
}


void chksum__pir_set_value( byte* data, long offset, byte value ) {

  check( offset + _PIR_CHKSUM <= MAX_OFFSET, "$PIR checksum out of bounds" );
  *( data + offset + _PIR_CHKSUM ) = value;
}