2016.09.01版u-boot问题

2019-07-16 07:55发布

U-Boot 2016.09.01 (Jul 19 2018 - 20:34:36 -0700)

CPUID: 32440001
FCLK:    400 MHz
HCLK:    100 MHz
PCLK:    50 MHz
DRAM:  64 MiB
WARNING: Caches not enabled
Flash: 0 Bytes
NAND:  256 MiB
*** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Net: dm9000
Hit any key to stop autoboot:  0
JZ2440 # save
Saving Environment to NAND...
env_valid = 1

saveenv函数原型在common/env_nand.c文件 第一行是我加的打印没有执行

int saveenv(void)
{
      printf("saveenv() ");
      int    ret = 0;
      ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
      int    env_idx = 0;
      static const struct env_location location[] = {
            {
                     .name = "NAND",
                     .erase_opts = {
                              .length = CONFIG_ENV_RANGE,
                              .offset = CONFIG_ENV_OFFSET,
                     },
            },
#ifdef CONFIG_ENV_OFFSET_REDUND
            {
                     .name = "redundant NAND",
                     .erase_opts = {
                              .length = CONFIG_ENV_RANGE,
                              .offset = CONFIG_ENV_OFFSET_REDUND,
                     },
            },
#endif
      };
      if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
            return 1;
      ret = env_export(env_new);
      if (ret)
            return ret;

#ifdef CONFIG_ENV_OFFSET_REDUND
      env_new->flags = ++env_flags; /* increase the serial */
      env_idx = (gd->env_valid == 1);
#endif

      ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
#ifdef CONFIG_ENV_OFFSET_REDUND
      if (!ret) {
            /* preset other copy for next write */
            gd->env_valid = gd->env_valid == 2 ? 1 : 2;
            return ret;
      }

      env_idx = (env_idx + 1) & 1;
      ret = erase_and_write_env(&location[env_idx], (u_char *)env_new);
      if (!ret)
            printf("Warning: primary env write failed,"
                              " redundancy is lost! ");
#endif

      return ret;
}

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