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 <stdio.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27
  28 #define __ASSEMBLY__    /* Dirty trick to get only #defines */
  29 #include <config.h>
  30 #undef  __ASSEMBLY__
  31
  32 #if defined(CFG_ENV_IS_IN_FLASH)
  33 # ifndef  CFG_ENV_ADDR
  34 #  define CFG_ENV_ADDR  (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  35 # endif
  36 # ifndef  CFG_ENV_OFFSET
  37 #  define CFG_ENV_OFFSET (CFG_ENV_ADDR - CFG_FLASH_BASE)
  38 # endif
  39 # if !defined(CFG_ENV_ADDR_REDUND) && defined(CFG_ENV_OFFSET_REDUND)
  40 #  define CFG_ENV_ADDR_REDUND   (CFG_FLASH_BASE + CFG_ENV_OFFSET_REDUND)
  41 # endif
  42 # ifndef  CFG_ENV_SIZE
  43 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
  44 # endif
  45 # if defined(CFG_ENV_ADDR_REDUND) && !defined(CFG_ENV_SIZE_REDUND)
  46 #  define CFG_ENV_SIZE_REDUND   CFG_ENV_SIZE
  47 # endif
  48 # if (CFG_ENV_ADDR >= CFG_MONITOR_BASE) && \
  49      ((CFG_ENV_ADDR + CFG_ENV_SIZE) <= (CFG_MONITOR_BASE + CFG_MONITOR_LEN))
  50 #  define ENV_IS_EMBEDDED       1
  51 # endif
  52 # if defined(CFG_ENV_ADDR_REDUND) || defined(CFG_ENV_OFFSET_REDUND)
  53 #  define CFG_REDUNDAND_ENVIRONMENT     1
  54 # endif
  55 #endif  /* CFG_ENV_IS_IN_FLASH */
  56
  57 #ifdef CFG_REDUNDAND_ENVIRONMENT
  58 # define ENV_HEADER_SIZE        (sizeof(unsigned long) + 1)
  59 #else
  60 # define ENV_HEADER_SIZE        (sizeof(unsigned long))
  61 #endif
  62
  63 #define ENV_SIZE (CFG_ENV_SIZE - ENV_HEADER_SIZE)
  64
  65
  66 extern unsigned long crc32 (unsigned long, const unsigned char *, unsigned int);
  67
  68 #ifdef  ENV_IS_EMBEDDED
  69 extern unsigned int env_size;
  70 extern unsigned char environment;
  71 #endif  /* ENV_IS_EMBEDDED */
  72
  73 int main (int argc, char **argv)
  74 {
  75 #ifdef  ENV_IS_EMBEDDED
  76     int crc ;
  77     unsigned char       *envptr         = &environment,
  78                         *dataptr        = envptr + ENV_HEADER_SIZE;
  79     unsigned int        datasize        = ENV_SIZE;
  80
  81     crc = crc32(0, dataptr, datasize) ;
  82
  83     /* Check if verbose mode is activated passing a parameter to the program */
  84     if (argc > 1) {
  85         printf("CRC32 from offset %08X to %08X of environment = %08X\n",
  86             (unsigned int)(dataptr - envptr),
  87             (unsigned int)(dataptr - envptr) + datasize,
  88             crc);
  89     } else {
  90         printf("0x%08X\n", crc);
  91     }
  92 #else
  93         printf("0\n");
  94 #endif
  95     return EXIT_SUCCESS;
  96 }
  97