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 } 139