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