tools/envcrc.c

   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
  24 #include <errno.h>
  25 #include <stdio.h>
  26 #include <stdint.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30
  31 #ifndef __ASSEMBLY__
  32 #define __ASSEMBLY__                    /* Dirty trick to get only #defines     */
  33 #endif
  34 #define __ASM_STUB_PROCESSOR_H__        /* don't include asm/processor.         */
  35 #include <config.h>
  36 #undef  __ASSEMBLY__
  37
  38 #if defined(CONFIG_ENV_IS_IN_FLASH)
  39 # ifndef  CONFIG_ENV_ADDR
  40 #  define CONFIG_ENV_ADDR       (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  41 # endif
  42 # ifndef  CONFIG_ENV_OFFSET
  43 #  define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
  44 # endif
  45 # if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
  46 #  define CONFIG_ENV_ADDR_REDUND        (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
  47 # endif
  48 # ifndef  CONFIG_ENV_SIZE
  49 #  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  50 # endif
  51 # if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
  52 #  define CONFIG_ENV_SIZE_REDUND        CONFIG_ENV_SIZE
  53 # endif
  54 # if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
  55      ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
  56 #  define ENV_IS_EMBEDDED       1
  57 # endif
  58 # if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
  59 #  define CONFIG_SYS_REDUNDAND_ENVIRONMENT      1
  60 # endif
  61 #endif  /* CONFIG_ENV_IS_IN_FLASH */
  62
  63 #if defined(ENV_IS_EMBEDDED) && !defined(CONFIG_BUILD_ENVCRC)
  64 # define CONFIG_BUILD_ENVCRC 1
  65 #endif
  66
  67 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
  68 # define ENV_HEADER_SIZE        (sizeof(uint32_t) + 1)
  69 #else
  70 # define ENV_HEADER_SIZE        (sizeof(uint32_t))
  71 #endif
  72
  73 #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
  74
  75
  76 #ifdef CONFIG_BUILD_ENVCRC
  77 # include <environment.h>
  78 extern unsigned int env_size;
  79 extern env_t environment;
  80 #endif  /* CONFIG_BUILD_ENVCRC */
  81
  82 extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
  83
  84 int main (int argc, char **argv)
  85 {
  86 #ifdef CONFIG_BUILD_ENVCRC
  87         unsigned char pad = 0x00;
  88         uint32_t crc;
  89         unsigned char *envptr = (unsigned char *)&environment,
  90                 *dataptr = envptr + ENV_HEADER_SIZE;
  91         unsigned int datasize = ENV_SIZE;
  92         unsigned int eoe;
  93
  94         if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
  95                 int ipad = 0xff;
  96                 if (argv[1][8] == '=')
  97                         sscanf(argv[1] + 9, "%i", &ipad);
  98                 pad = ipad;
  99         }
 100
 101         if (pad) {
 102                 /* find the end of env */
 103                 for (eoe = 0; eoe < datasize - 1; ++eoe)
 104                         if (!dataptr[eoe] && !dataptr[eoe+1]) {
 105                                 eoe += 2;
 106                                 break;
 107                         }
 108                 if (eoe < datasize - 1)
 109                         memset(dataptr + eoe, pad, datasize - eoe);
 110         }
 111
 112         crc = crc32 (0, dataptr, datasize);
 113
 114         /* Check if verbose mode is activated passing a parameter to the program */
 115         if (argc > 1) {
 116                 if (!strncmp(argv[1], "--binary", 8)) {
 117                         int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
 118                         size_t i, start, end, step;
 119                         if (le) {
 120                                 start = 0;
 121                                 end = ENV_HEADER_SIZE;
 122                                 step = 1;
 123                         } else {
 124                                 start = ENV_HEADER_SIZE - 1;
 125                                 end = -1;
 126                                 step = -1;
 127                         }
 128                         for (i = start; i != end; i += step)
 129                                 printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
 130                         if (fwrite(dataptr, 1, datasize, stdout) != datasize)
 131                                 fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
 132                 } else {
 133                         printf("CRC32 from offset %08X to %08X of environment = %08X\n",
 134                                 (unsigned int) (dataptr - envptr),
 135                                 (unsigned int) (dataptr - envptr) + datasize,
 136                                 crc);
 137                 }
 138         } else {
 139                 printf ("0x%08X\n", crc);
 140         }
 141 #else
 142         printf ("0\n");
 143 #endif
 144         return EXIT_SUCCESS;
 145 }