envcrc.c 3.9 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 (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
  51. ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
  52. # define ENV_IS_EMBEDDED 1
  53. # endif
  54. # if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
  55. # define CONFIG_SYS_REDUNDAND_ENVIRONMENT 1
  56. # endif
  57. #endif /* CONFIG_ENV_IS_IN_FLASH */
  58. #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
  59. # define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
  60. #else
  61. # define ENV_HEADER_SIZE (sizeof(uint32_t))
  62. #endif
  63. #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
  64. extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
  65. #ifdef ENV_IS_EMBEDDED
  66. extern unsigned int env_size;
  67. extern unsigned char environment;
  68. #endif /* ENV_IS_EMBEDDED */
  69. int main (int argc, char **argv)
  70. {
  71. #ifdef ENV_IS_EMBEDDED
  72. unsigned char pad = 0x00;
  73. uint32_t crc;
  74. unsigned char *envptr = &environment,
  75. *dataptr = envptr + ENV_HEADER_SIZE;
  76. unsigned int datasize = ENV_SIZE;
  77. unsigned int eoe;
  78. if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
  79. int ipad = 0xff;
  80. if (argv[1][8] == '=')
  81. sscanf(argv[1] + 9, "%i", &ipad);
  82. pad = ipad;
  83. }
  84. if (pad) {
  85. /* find the end of env */
  86. for (eoe = 0; eoe < datasize - 1; ++eoe)
  87. if (!dataptr[eoe] && !dataptr[eoe+1]) {
  88. eoe += 2;
  89. break;
  90. }
  91. if (eoe < datasize - 1)
  92. memset(dataptr + eoe, pad, datasize - eoe);
  93. }
  94. crc = crc32 (0, dataptr, datasize);
  95. /* Check if verbose mode is activated passing a parameter to the program */
  96. if (argc > 1) {
  97. if (!strncmp(argv[1], "--binary", 8)) {
  98. int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
  99. size_t i, start, end, step;
  100. if (le) {
  101. start = 0;
  102. end = ENV_HEADER_SIZE;
  103. step = 1;
  104. } else {
  105. start = ENV_HEADER_SIZE - 1;
  106. end = -1;
  107. step = -1;
  108. }
  109. for (i = start; i != end; i += step)
  110. printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
  111. fwrite(dataptr, 1, datasize, stdout);
  112. } else {
  113. printf("CRC32 from offset %08X to %08X of environment = %08X\n",
  114. (unsigned int) (dataptr - envptr),
  115. (unsigned int) (dataptr - envptr) + datasize,
  116. crc);
  117. }
  118. } else {
  119. printf ("0x%08X\n", crc);
  120. }
  121. #else
  122. printf ("0\n");
  123. #endif
  124. return EXIT_SUCCESS;
  125. }