1 /* 2 * (C) Copyright 2001 3 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <errno.h> 9 #include <stdio.h> 10 #include <stdint.h> 11 #include <stdlib.h> 12 #include <string.h> 13 #include <unistd.h> 14 15 #include <linux/kconfig.h> 16 17 #ifndef __ASSEMBLY__ 18 #define __ASSEMBLY__ /* Dirty trick to get only #defines */ 19 #endif 20 #define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */ 21 #include <config.h> 22 #undef __ASSEMBLY__ 23 24 #if defined(CONFIG_ENV_IS_IN_FLASH) 25 # ifndef CONFIG_ENV_ADDR 26 # define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET) 27 # endif 28 # ifndef CONFIG_ENV_OFFSET 29 # define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE) 30 # endif 31 # if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND) 32 # define CONFIG_ENV_ADDR_REDUND (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND) 33 # endif 34 # ifndef CONFIG_ENV_SIZE 35 # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE 36 # endif 37 # if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND) 38 # define CONFIG_ENV_SIZE_REDUND CONFIG_ENV_SIZE 39 # endif 40 # if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \ 41 ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) 42 # define ENV_IS_EMBEDDED 43 # endif 44 # if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND) 45 # define CONFIG_SYS_REDUNDAND_ENVIRONMENT 46 # endif 47 #endif /* CONFIG_ENV_IS_IN_FLASH */ 48 49 #if defined(ENV_IS_EMBEDDED) && !defined(CONFIG_BUILD_ENVCRC) 50 # define CONFIG_BUILD_ENVCRC 51 #endif 52 53 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT 54 # define ENV_HEADER_SIZE (sizeof(uint32_t) + 1) 55 #else 56 # define ENV_HEADER_SIZE (sizeof(uint32_t)) 57 #endif 58 59 #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE) 60 61 62 #ifdef CONFIG_BUILD_ENVCRC 63 # include <environment.h> 64 extern unsigned int env_size; 65 extern env_t environment; 66 #endif /* CONFIG_BUILD_ENVCRC */ 67 68 extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int); 69 70 int main (int argc, char **argv) 71 { 72 #ifdef CONFIG_BUILD_ENVCRC 73 unsigned char pad = 0x00; 74 uint32_t crc; 75 unsigned char *envptr = (unsigned char *)&environment, 76 *dataptr = envptr + ENV_HEADER_SIZE; 77 unsigned int datasize = ENV_SIZE; 78 unsigned int eoe; 79 80 if (argv[1] && !strncmp(argv[1], "--binary", 8)) { 81 int ipad = 0xff; 82 if (argv[1][8] == '=') 83 sscanf(argv[1] + 9, "%i", &ipad); 84 pad = ipad; 85 } 86 87 if (pad) { 88 /* find the end of env */ 89 for (eoe = 0; eoe < datasize - 1; ++eoe) 90 if (!dataptr[eoe] && !dataptr[eoe+1]) { 91 eoe += 2; 92 break; 93 } 94 if (eoe < datasize - 1) 95 memset(dataptr + eoe, pad, datasize - eoe); 96 } 97 98 crc = crc32 (0, dataptr, datasize); 99 100 /* Check if verbose mode is activated passing a parameter to the program */ 101 if (argc > 1) { 102 if (!strncmp(argv[1], "--binary", 8)) { 103 int le = (argc > 2 ? !strcmp(argv[2], "le") : 1); 104 size_t i, start, end, step; 105 if (le) { 106 start = 0; 107 end = ENV_HEADER_SIZE; 108 step = 1; 109 } else { 110 start = ENV_HEADER_SIZE - 1; 111 end = -1; 112 step = -1; 113 } 114 for (i = start; i != end; i += step) 115 printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8)); 116 if (fwrite(dataptr, 1, datasize, stdout) != datasize) 117 fprintf(stderr, "fwrite() failed: %s\n", strerror(errno)); 118 } else { 119 printf("CRC32 from offset %08X to %08X of environment = %08X\n", 120 (unsigned int) (dataptr - envptr), 121 (unsigned int) (dataptr - envptr) + datasize, 122 crc); 123 } 124 } else { 125 printf ("0x%08X\n", crc); 126 } 127 #else 128 printf ("0\n"); 129 #endif 130 return EXIT_SUCCESS; 131 } 132