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 # ifndef CFG_ENV_SIZE 40 # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE 41 # endif 42 # if ((CFG_ENV_ADDR >= CFG_MONITOR_BASE) && \ 43 ((CFG_ENV_ADDR+CFG_ENV_SIZE) <= (CFG_MONITOR_BASE + CFG_MONITOR_LEN))) 44 # define ENV_IS_EMBEDDED 45 # endif 46 #endif /* CFG_ENV_IS_IN_FLASH */ 47 48 extern unsigned long crc32 (unsigned long, const unsigned char *, unsigned int); 49 50 #ifdef ENV_IS_EMBEDDED 51 extern unsigned int env_size; 52 extern unsigned char environment; 53 #endif /* ENV_IS_EMBEDDED */ 54 55 int main (int argc, char **argv) 56 { 57 #ifdef ENV_IS_EMBEDDED 58 int crc ; 59 unsigned char *envptr = &environment, 60 *dataptr = envptr + sizeof(unsigned int) + 1; 61 unsigned int datasize = env_size - (dataptr - envptr) ; 62 63 64 crc = crc32(0, dataptr, datasize) ; 65 66 /* Check if verbose mode is activated passing a parameter to the program */ 67 if (argc > 1) { 68 printf("CRC32 from offset %08X to %08X of environment = %08X\n", 69 (unsigned int)(dataptr - envptr), 70 (unsigned int)(dataptr - envptr) + datasize, 71 crc); 72 } else { 73 printf("0x%08X\n", crc); 74 } 75 #else 76 printf("0\n"); 77 #endif 78 return EXIT_SUCCESS; 79 } 80 81