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 #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
  35 #if defined(CFG_ENV_IS_IN_FLASH)
  36 # ifndef  CFG_ENV_ADDR
  37 #  define CFG_ENV_ADDR  (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  38 # endif
  39 # ifndef  CFG_ENV_OFFSET
  40 #  define CFG_ENV_OFFSET (CFG_ENV_ADDR - CFG_FLASH_BASE)
  41 # endif
  42 # if !defined(CFG_ENV_ADDR_REDUND) && defined(CFG_ENV_OFFSET_REDUND)
  43 #  define CFG_ENV_ADDR_REDUND   (CFG_FLASH_BASE + CFG_ENV_OFFSET_REDUND)
  44 # endif
  45 # ifndef  CFG_ENV_SIZE
  46 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
  47 # endif
  48 # if defined(CFG_ENV_ADDR_REDUND) && !defined(CFG_ENV_SIZE_REDUND)
  49 #  define CFG_ENV_SIZE_REDUND   CFG_ENV_SIZE
  50 # endif
  51 # if (CFG_ENV_ADDR >= CFG_MONITOR_BASE) && \
  52      ((CFG_ENV_ADDR + CFG_ENV_SIZE) <= (CFG_MONITOR_BASE + CFG_MONITOR_LEN))
  53 #  define ENV_IS_EMBEDDED       1
  54 # endif
  55 # if defined(CFG_ENV_ADDR_REDUND) || defined(CFG_ENV_OFFSET_REDUND)
  56 #  define CFG_REDUNDAND_ENVIRONMENT     1
  57 # endif
  58 #endif  /* CFG_ENV_IS_IN_FLASH */
  59
  60 #ifdef CFG_REDUNDAND_ENVIRONMENT
  61 # define ENV_HEADER_SIZE        (sizeof(unsigned long) + 1)
  62 #else
  63 # define ENV_HEADER_SIZE        (sizeof(unsigned long))
  64 #endif
  65
  66 #define ENV_SIZE (CFG_ENV_SIZE - ENV_HEADER_SIZE)
  67
  68
  69 extern unsigned long crc32 (unsigned long, const unsigned char *, unsigned int);
  70
  71 #ifdef  ENV_IS_EMBEDDED
  72 extern unsigned int env_size;
  73 extern unsigned char environment;
  74 #endif  /* ENV_IS_EMBEDDED */
  75
  76 int main (int argc, char **argv)
  77 {
  78 #ifdef  ENV_IS_EMBEDDED
  79         int crc;
  80         unsigned char *envptr = &environment,
  81                 *dataptr = envptr + ENV_HEADER_SIZE;
  82         unsigned int datasize = ENV_SIZE;
  83
  84         crc = crc32 (0, dataptr, datasize);
  85
  86         /* Check if verbose mode is activated passing a parameter to the program */
  87         if (argc > 1) {
  88                 printf ("CRC32 from offset %08X to %08X of environment = %08X\n",
  89                         (unsigned int) (dataptr - envptr),
  90                         (unsigned int) (dataptr - envptr) + datasize,
  91                         crc);
  92         } else {
  93                 printf ("0x%08X\n", crc);
  94         }
  95 #else
  96         printf ("0\n");
  97 #endif
  98         return EXIT_SUCCESS;
  99 }