LXR uboot/tools/envcrc.c

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