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#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>
  64extern unsigned int env_size;
  65extern env_t environment;
  66#endif  /* CONFIG_BUILD_ENVCRC */
  67
  68extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
  69
  70int 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