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