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 <errno.h> 25 #include <stdio.h> 26 #include <stdint.h> 27 #include <stdlib.h> 28 #include <string.h> 29 #include <unistd.h> 30 31 #ifndef __ASSEMBLY__ 32 #define __ASSEMBLY__ /* Dirty trick to get only #defines */ 33 #endif 34 #define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */ 35 #include <config.h> 36 #undef __ASSEMBLY__ 37 38 #if defined(CONFIG_ENV_IS_IN_FLASH) 39 # ifndef CONFIG_ENV_ADDR 40 # define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET) 41 # endif 42 # ifndef CONFIG_ENV_OFFSET 43 # define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE) 44 # endif 45 # if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND) 46 # define CONFIG_ENV_ADDR_REDUND (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND) 47 # endif 48 # ifndef CONFIG_ENV_SIZE 49 # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE 50 # endif 51 # if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND) 52 # define CONFIG_ENV_SIZE_REDUND CONFIG_ENV_SIZE 53 # endif 54 # if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \ 55 ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) 56 # define ENV_IS_EMBEDDED 1 57 # endif 58 # if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND) 59 # define CONFIG_SYS_REDUNDAND_ENVIRONMENT 1 60 # endif 61 #endif /* CONFIG_ENV_IS_IN_FLASH */ 62 63 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT 64 # define ENV_HEADER_SIZE (sizeof(uint32_t) + 1) 65 #else 66 # define ENV_HEADER_SIZE (sizeof(uint32_t)) 67 #endif 68 69 #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE) 70 71 72 extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int); 73 74 #ifdef ENV_IS_EMBEDDED 75 extern unsigned int env_size; 76 extern unsigned char environment; 77 #endif /* ENV_IS_EMBEDDED */ 78 79 int main (int argc, char **argv) 80 { 81 #ifdef ENV_IS_EMBEDDED 82 unsigned char pad = 0x00; 83 uint32_t crc; 84 unsigned char *envptr = &environment, 85 *dataptr = envptr + ENV_HEADER_SIZE; 86 unsigned int datasize = ENV_SIZE; 87 unsigned int eoe; 88 89 if (argv[1] && !strncmp(argv[1], "--binary", 8)) { 90 int ipad = 0xff; 91 if (argv[1][8] == '=') 92 sscanf(argv[1] + 9, "%i", &ipad); 93 pad = ipad; 94 } 95 96 if (pad) { 97 /* find the end of env */ 98 for (eoe = 0; eoe < datasize - 1; ++eoe) 99 if (!dataptr[eoe] && !dataptr[eoe+1]) { 100 eoe += 2; 101 break; 102 } 103 if (eoe < datasize - 1) 104 memset(dataptr + eoe, pad, datasize - eoe); 105 } 106 107 crc = crc32 (0, dataptr, datasize); 108 109 /* Check if verbose mode is activated passing a parameter to the program */ 110 if (argc > 1) { 111 if (!strncmp(argv[1], "--binary", 8)) { 112 int le = (argc > 2 ? !strcmp(argv[2], "le") : 1); 113 size_t i, start, end, step; 114 if (le) { 115 start = 0; 116 end = ENV_HEADER_SIZE; 117 step = 1; 118 } else { 119 start = ENV_HEADER_SIZE - 1; 120 end = -1; 121 step = -1; 122 } 123 for (i = start; i != end; i += step) 124 printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8)); 125 if (fwrite(dataptr, 1, datasize, stdout) != datasize) 126 fprintf(stderr, "fwrite() failed: %s\n", strerror(errno)); 127 } else { 128 printf("CRC32 from offset %08X to %08X of environment = %08X\n", 129 (unsigned int) (dataptr - envptr), 130 (unsigned int) (dataptr - envptr) + datasize, 131 crc); 132 } 133 } else { 134 printf ("0x%08X\n", crc); 135 } 136 #else 137 printf ("0\n"); 138 #endif 139 return EXIT_SUCCESS; 140 } 141