envcrc.c
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/*
* (C) Copyright 2001
* Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <errno.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifndef __ASSEMBLY__
#define __ASSEMBLY__ /* Dirty trick to get only #defines */
#endif
#define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */
#include <config.h>
#undef __ASSEMBLY__
#if defined(CONFIG_ENV_IS_IN_FLASH)
# ifndef CONFIG_ENV_ADDR
# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
# endif
# ifndef CONFIG_ENV_OFFSET
# define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
# endif
# if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
# define CONFIG_ENV_ADDR_REDUND (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
# endif
# ifndef CONFIG_ENV_SIZE
# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
# endif
# if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
# define CONFIG_ENV_SIZE_REDUND CONFIG_ENV_SIZE
# endif
# if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
# define ENV_IS_EMBEDDED
# endif
# if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
# define CONFIG_SYS_REDUNDAND_ENVIRONMENT
# endif
#endif /* CONFIG_ENV_IS_IN_FLASH */
#if defined(ENV_IS_EMBEDDED) && !defined(CONFIG_BUILD_ENVCRC)
# define CONFIG_BUILD_ENVCRC
#endif
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
# define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
#else
# define ENV_HEADER_SIZE (sizeof(uint32_t))
#endif
#define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
#ifdef CONFIG_BUILD_ENVCRC
# include <environment.h>
extern unsigned int env_size;
extern env_t environment;
#endif /* CONFIG_BUILD_ENVCRC */
extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
int main (int argc, char **argv)
{
#ifdef CONFIG_BUILD_ENVCRC
unsigned char pad = 0x00;
uint32_t crc;
unsigned char *envptr = (unsigned char *)&environment,
*dataptr = envptr + ENV_HEADER_SIZE;
unsigned int datasize = ENV_SIZE;
unsigned int eoe;
if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
int ipad = 0xff;
if (argv[1][8] == '=')
sscanf(argv[1] + 9, "%i", &ipad);
pad = ipad;
}
if (pad) {
/* find the end of env */
for (eoe = 0; eoe < datasize - 1; ++eoe)
if (!dataptr[eoe] && !dataptr[eoe+1]) {
eoe += 2;
break;
}
if (eoe < datasize - 1)
memset(dataptr + eoe, pad, datasize - eoe);
}
crc = crc32 (0, dataptr, datasize);
/* Check if verbose mode is activated passing a parameter to the program */
if (argc > 1) {
if (!strncmp(argv[1], "--binary", 8)) {
int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
size_t i, start, end, step;
if (le) {
start = 0;
end = ENV_HEADER_SIZE;
step = 1;
} else {
start = ENV_HEADER_SIZE - 1;
end = -1;
step = -1;
}
for (i = start; i != end; i += step)
printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
if (fwrite(dataptr, 1, datasize, stdout) != datasize)
fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
} else {
printf("CRC32 from offset %08X to %08X of environment = %08X\n",
(unsigned int) (dataptr - envptr),
(unsigned int) (dataptr - envptr) + datasize,
crc);
}
} else {
printf ("0x%08X\n", crc);
}
#else
printf ("0\n");
#endif
return EXIT_SUCCESS;
}