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 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#include <errno.h>
  25#include <stdio.h>
  26#include <stdint.h>
  27#include <stdlib.h>
  28#include <string.h>
  29#include <unistd.h>
  30
  31#ifndef __ASSEMBLY__
  32#define __ASSEMBLY__                    /* Dirty trick to get only #defines     */
  33#endif
  34#define __ASM_STUB_PROCESSOR_H__        /* don't include asm/processor.         */
  35#include <config.h>
  36#undef  __ASSEMBLY__
  37
  38#if defined(CONFIG_ENV_IS_IN_FLASH)
  39# ifndef  CONFIG_ENV_ADDR
  40#  define CONFIG_ENV_ADDR       (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
  41# endif
  42# ifndef  CONFIG_ENV_OFFSET
  43#  define CONFIG_ENV_OFFSET (CONFIG_ENV_ADDR - CONFIG_SYS_FLASH_BASE)
  44# endif
  45# if !defined(CONFIG_ENV_ADDR_REDUND) && defined(CONFIG_ENV_OFFSET_REDUND)
  46#  define CONFIG_ENV_ADDR_REDUND        (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET_REDUND)
  47# endif
  48# ifndef  CONFIG_ENV_SIZE
  49#  define CONFIG_ENV_SIZE       CONFIG_ENV_SECT_SIZE
  50# endif
  51# if defined(CONFIG_ENV_ADDR_REDUND) && !defined(CONFIG_ENV_SIZE_REDUND)
  52#  define CONFIG_ENV_SIZE_REDUND        CONFIG_ENV_SIZE
  53# endif
  54# if (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE) && \
  55     ((CONFIG_ENV_ADDR + CONFIG_ENV_SIZE) <= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN))
  56#  define ENV_IS_EMBEDDED       1
  57# endif
  58# if defined(CONFIG_ENV_ADDR_REDUND) || defined(CONFIG_ENV_OFFSET_REDUND)
  59#  define CONFIG_SYS_REDUNDAND_ENVIRONMENT      1
  60# endif
  61#endif  /* CONFIG_ENV_IS_IN_FLASH */
  62
  63#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
  64# define ENV_HEADER_SIZE        (sizeof(uint32_t) + 1)
  65#else
  66# define ENV_HEADER_SIZE        (sizeof(uint32_t))
  67#endif
  68
  69#define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
  70
  71
  72extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
  73
  74#ifdef  ENV_IS_EMBEDDED
  75extern unsigned int env_size;
  76extern unsigned char environment;
  77#endif  /* ENV_IS_EMBEDDED */
  78
  79int main (int argc, char **argv)
  80{
  81#ifdef  ENV_IS_EMBEDDED
  82        unsigned char pad = 0x00;
  83        uint32_t crc;
  84        unsigned char *envptr = &environment,
  85                *dataptr = envptr + ENV_HEADER_SIZE;
  86        unsigned int datasize = ENV_SIZE;
  87        unsigned int eoe;
  88
  89        if (argv[1] && !strncmp(argv[1], "--binary", 8)) {
  90                int ipad = 0xff;
  91                if (argv[1][8] == '=')
  92                        sscanf(argv[1] + 9, "%i", &ipad);
  93                pad = ipad;
  94        }
  95
  96        if (pad) {
  97                /* find the end of env */
  98                for (eoe = 0; eoe < datasize - 1; ++eoe)
  99                        if (!dataptr[eoe] && !dataptr[eoe+1]) {
 100                                eoe += 2;
 101                                break;
 102                        }
 103                if (eoe < datasize - 1)
 104                        memset(dataptr + eoe, pad, datasize - eoe);
 105        }
 106
 107        crc = crc32 (0, dataptr, datasize);
 108
 109        /* Check if verbose mode is activated passing a parameter to the program */
 110        if (argc > 1) {
 111                if (!strncmp(argv[1], "--binary", 8)) {
 112                        int le = (argc > 2 ? !strcmp(argv[2], "le") : 1);
 113                        size_t i, start, end, step;
 114                        if (le) {
 115                                start = 0;
 116                                end = ENV_HEADER_SIZE;
 117                                step = 1;
 118                        } else {
 119                                start = ENV_HEADER_SIZE - 1;
 120                                end = -1;
 121                                step = -1;
 122                        }
 123                        for (i = start; i != end; i += step)
 124                                printf("%c", (crc & (0xFF << (i * 8))) >> (i * 8));
 125                        if (fwrite(dataptr, 1, datasize, stdout) != datasize)
 126                                fprintf(stderr, "fwrite() failed: %s\n", strerror(errno));
 127                } else {
 128                        printf("CRC32 from offset %08X to %08X of environment = %08X\n",
 129                                (unsigned int) (dataptr - envptr),
 130                                (unsigned int) (dataptr - envptr) + datasize,
 131                                crc);
 132                }
 133        } else {
 134                printf ("0x%08X\n", crc);
 135        }
 136#else
 137        printf ("0\n");
 138#endif
 139        return EXIT_SUCCESS;
 140}
 141