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 <stdint.h>
  26 #include <stdlib.h>
  27 #include <unistd.h>
  28
  29 #ifndef __ASSEMBLY__
  30 #define __ASSEMBLY__                    /* Dirty trick to get only #defines     */
  31 #endif
  32 #define __ASM_STUB_PROCESSOR_H__        /* don't include asm/processor.         */
  33 #include <config.h>
  34 #undef  __ASSEMBLY__
  35
  36 #if defined(CFG_ENV_IS_IN_FLASH)
  37 # ifndef  CFG_ENV_ADDR
  38 #  define CFG_ENV_ADDR  (CFG_FLASH_BASE + CFG_ENV_OFFSET)
  39 # endif
  40 # ifndef  CFG_ENV_OFFSET
  41 #  define CFG_ENV_OFFSET (CFG_ENV_ADDR - CFG_FLASH_BASE)
  42 # endif
  43 # if !defined(CFG_ENV_ADDR_REDUND) && defined(CFG_ENV_OFFSET_REDUND)
  44 #  define CFG_ENV_ADDR_REDUND   (CFG_FLASH_BASE + CFG_ENV_OFFSET_REDUND)
  45 # endif
  46 # ifndef  CFG_ENV_SIZE
  47 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
  48 # endif
  49 # if defined(CFG_ENV_ADDR_REDUND) && !defined(CFG_ENV_SIZE_REDUND)
  50 #  define CFG_ENV_SIZE_REDUND   CFG_ENV_SIZE
  51 # endif
  52 # if (CFG_ENV_ADDR >= CFG_MONITOR_BASE) && \
  53      ((CFG_ENV_ADDR + CFG_ENV_SIZE) <= (CFG_MONITOR_BASE + CFG_MONITOR_LEN))
  54 #  define ENV_IS_EMBEDDED       1
  55 # endif
  56 # if defined(CFG_ENV_ADDR_REDUND) || defined(CFG_ENV_OFFSET_REDUND)
  57 #  define CFG_REDUNDAND_ENVIRONMENT     1
  58 # endif
  59 #endif  /* CFG_ENV_IS_IN_FLASH */
  60
  61 #ifdef CFG_REDUNDAND_ENVIRONMENT
  62 # define ENV_HEADER_SIZE        (sizeof(uint32_t) + 1)
  63 #else
  64 # define ENV_HEADER_SIZE        (sizeof(uint32_t))
  65 #endif
  66
  67 #define ENV_SIZE (CFG_ENV_SIZE - ENV_HEADER_SIZE)
  68
  69
  70 extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
  71
  72 #ifdef  ENV_IS_EMBEDDED
  73 extern unsigned int env_size;
  74 extern unsigned char environment;
  75 #endif  /* ENV_IS_EMBEDDED */
  76
  77 int main (int argc, char **argv)
  78 {
  79 #ifdef  ENV_IS_EMBEDDED
  80         uint32_t crc;
  81         unsigned char *envptr = &environment,
  82                 *dataptr = envptr + ENV_HEADER_SIZE;
  83         unsigned int datasize = ENV_SIZE;
  84
  85         crc = crc32 (0, dataptr, datasize);
  86
  87         /* Check if verbose mode is activated passing a parameter to the program */
  88         if (argc > 1) {
  89                 printf ("CRC32 from offset %08X to %08X of environment = %08X\n",
  90                         (unsigned int) (dataptr - envptr),
  91                         (unsigned int) (dataptr - envptr) + datasize,
  92                         crc);
  93         } else {
  94                 printf ("0x%08X\n", crc);
  95         }
  96 #else
  97         printf ("0\n");
  98 #endif
  99         return EXIT_SUCCESS;
 100 }