envcrc.c 3.6 KB

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  1. /*
  2. * (C) Copyright 2001
  3. * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
  4. *
  5. * See file CREDITS for list of people who contributed to this
  6. * project.
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License as
  10. * published by the Free Software Foundation; either version 2 of
  11. * the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21. * MA 02111-1307 USA
  22. */
  23. #include <stdio.h>
  24. #include <stdint.h>
  25. #include <stdlib.h>
  26. #include <string.h>
  27. #include <unistd.h>
  28. #ifndef __ASSEMBLY__
  29. #define __ASSEMBLY__ /* Dirty trick to get only #defines */
  30. #endif
  31. #define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */
  32. #include <config.h>
  33. #undef __ASSEMBLY__
  34. #if defined(CONFIG_ENV_IS_IN_FLASH)
  35. # ifndef CONFIG_ENV_ADDR
  36. # define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  37. # endif
  38. # ifndef CONFIG_ENV_OFFSET
  39. # define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
  40. # endif
  41. # if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
  42. # define CONFIG_ENV_ADDR_REDUND (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
  43. # endif
  44. # ifndef CONFIG_ENV_SIZE
  45. # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
  46. # endif
  47. # if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
  48. # define CONFIG_ENV_SIZE_REDUND CONFIG_ENV_SIZE
  49. # endif
  50. # if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
  51. # define CONFIG_SYS_REDUNDAND_ENVIRONMENT 1
  52. # endif
  53. #endif /* CONFIG_ENV_IS_IN_FLASH */
  54. #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
  55. # define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
  56. #else
  57. # define ENV_HEADER_SIZE (sizeof(uint32_t))
  58. #endif
  59. #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
  60. extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
  61. extern unsigned int env_size;
  62. extern unsigned char environment;
  63. int main (int argc, char **argv)
  64. {
  65. unsigned char pad = 0x00;
  66. uint32_t crc;
  67. unsigned char *envptr = &environment,
  68. *dataptr = envptr + ENV_HEADER_SIZE;
  69. unsigned int datasize = ENV_SIZE;
  70. unsigned int eoe;
  71. if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
  72. int ipad = 0xff;
  73. if (argv[1][8] == '=')
  74. sscanf(argv[1] + 9, "%i", &ipad);
  75. pad = ipad;
  76. }
  77. if (pad) {
  78. /* find the end of env */
  79. for (eoe = 0; eoe < datasize - 1; ++eoe)
  80. if (!dataptr[eoe] && !dataptr[eoe+1]) {
  81. eoe += 2;
  82. break;
  83. }
  84. if (eoe < datasize - 1)
  85. memset(dataptr + eoe, pad, datasize - eoe);
  86. }
  87. crc = crc32 (0, dataptr, datasize);
  88. /* Check if verbose mode is activated passing a parameter to the program */
  89. if (argc > 1) {
  90. if (!strncmp(argv[1], "--binary", 8)) {
  91. int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
  92. size_t i, start, end, step;
  93. if (le) {
  94. start = 0;
  95. end = ENV_HEADER_SIZE;
  96. step = 1;
  97. } else {
  98. start = ENV_HEADER_SIZE - 1;
  99. end = -1;
  100. step = -1;
  101. }
  102. for (i = start; i != end; i += step)
  103. printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
  104. fwrite(dataptr, 1, datasize, stdout);
  105. } else {
  106. printf("CRC32 from offset %08X to %08X of environment = %08X\n",
  107. (unsigned int) (dataptr - envptr),
  108. (unsigned int) (dataptr - envptr) + datasize,
  109. crc);
  110. }
  111. } else {
  112. printf ("0x%08X\n", crc);
  113. }
  114. return EXIT_SUCCESS;
  115. }