LXR uboot/tools/envcrc.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2001
   4 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
   5 */
   6
   7#include <errno.h>
   8#include <stdio.h>
   9#include <stdint.h>
  10#include <stdlib.h>
  11#include <string.h>
  12#include <u-boot/crc.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 (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
  38     ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
  39#  define ENV_IS_EMBEDDED
  40# endif
  41#endif  /* CONFIG_ENV_IS_IN_FLASH */
  42
  43#if defined(ENV_IS_EMBEDDED) && !defined(CONFIG_BUILD_ENVCRC)
  44# define CONFIG_BUILD_ENVCRC
  45#endif
  46
  47#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
  48# define ENV_HEADER_SIZE        (sizeof(uint32_t) + 1)
  49#else
  50# define ENV_HEADER_SIZE        (sizeof(uint32_t))
  51#endif
  52
  53#define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
  54
  55
  56#ifdef CONFIG_BUILD_ENVCRC
  57# include <env_internal.h>
  58extern unsigned int env_size;
  59extern env_t embedded_environment;
  60#endif  /* CONFIG_BUILD_ENVCRC */
  61
  62extern uint32_t crc32(uint32_t, const unsigned char *, unsigned int);
  63
  64int main (int argc, char **argv)
  65{
  66#ifdef CONFIG_BUILD_ENVCRC
  67        unsigned char pad = 0x00;
  68        uint32_t crc;
  69        unsigned char *envptr = (unsigned char *)&embedded_environment,
  70                *dataptr = envptr + ENV_HEADER_SIZE;
  71        unsigned int datasize = ENV_SIZE;
  72        unsigned int eoe;
  73
  74        if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
  75                int ipad = 0xff;
  76                if (argv[1][8] == '=')
  77                        sscanf(argv[1] + 9, "%i", &ipad);
  78                pad = ipad;
  79        }
  80
  81        if (pad) {
  82                /* find the end of env */
  83                for (eoe = 0; eoe < datasize - 1; ++eoe)
  84                        if (!dataptr[eoe] && !dataptr[eoe+1]) {
  85                                eoe += 2;
  86                                break;
  87                        }
  88                if (eoe < datasize - 1)
  89                        memset(dataptr + eoe, pad, datasize - eoe);
  90        }
  91
  92        crc = crc32(0, dataptr, datasize);
  93
  94        /* Check if verbose mode is activated passing a parameter to the program */
  95        if (argc > 1) {
  96                if (!strncmp(argv[1], "--binary", 8)) {
  97                        int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
  98                        size_t i, start, end, step;
  99                        if (le) {
 100                                start = 0;
 101                                end = ENV_HEADER_SIZE;
 102                                step = 1;
 103                        } else {
 104                                start = ENV_HEADER_SIZE - 1;
 105                                end = -1;
 106                                step = -1;
 107                        }
 108                        for (i = start; i != end; i += step)
 109                                printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
 110                        if (fwrite(dataptr, 1, datasize, stdout) != datasize)
 111                                fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
 112                } else {
 113                        printf("CRC32 from offset %08X to %08X of environment = %08X\n",
 114                                (unsigned int) (dataptr - envptr),
 115                                (unsigned int) (dataptr - envptr) + datasize,
 116                                crc);
 117                }
 118        } else {
 119                printf ("0x%08X\n", crc);
 120        }
 121#else
 122        printf ("0\n");
 123#endif
 124        return EXIT_SUCCESS;
 125}
 126