C++ set_default_env函数代码示例

/*
 * Check if CRC is valid and (if yes) import the environment.
 * Note that "buf" may or may not be aligned.
 */
int env_import(const char *buf, int check)
{
	env_t *ep = (env_t *)buf;

	if (check) {
		uint32_t crc;

		memcpy(&crc, &ep->crc, sizeof(crc));

		if (crc32(0, ep->data, ENV_SIZE) != crc) {
			set_default_env("!bad CRC");
			return 0;
        }else if(ep->data[0] == 0xff){
			printf("check env data = 0xff, set default env\n");
			set_default_env("!check env data is 0xff");
			saveenv();
			return 0;
 		}
	}

	if (himport_r(&env_htab, (char *)ep->data, ENV_SIZE, '\0', 0)) {
		gd->flags |= GD_FLG_ENV_READY;
		return 1;
	}

	error("Cannot import environment: errno = %d\n", errno);

	set_default_env("!import failed");

	return 0;
}

void env_relocate (void)
{

#if defined (CONFIG_VLSI_EMULATOR)
    set_default_env("!For emulator speed up");
#else
#if defined(CONFIG_NEEDS_MANUAL_RELOC)
	extern void env_reloc(void);

	env_reloc();
#endif
	if (gd->env_valid == 0) {
#if defined(CONFIG_ENV_IS_NOWHERE)	/* Environment not changable */
		set_default_env(NULL);
#else
		show_boot_progress (-60);
		set_default_env("!bad CRC");
#endif
	} else {
		env_relocate_spec ();
	}
#endif //#if !defined (CONFIG_VLSI_EMULATOR)

#if defined(CONFIG_SILENT_CONSOLE) && \
	defined(CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC)
	if (getenv("silent") != NULL) {
		puts("silenced by env\n");
		gd->flags |= GD_FLG_SILENT;
	} else {
		gd->flags &= ~GD_FLG_SILENT;
	}
#endif
}

void env_relocate_spec(void)
{
	int ret;
	char *buf = NULL;

	buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
	env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
	if (!env_flash) {
		set_default_env("!spi_flash_probe() failed");
		if (buf)
			free(buf);
		return;
	}

	ret = spi_flash_read(env_flash,
		CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
	if (ret) {
		set_default_env("!spi_flash_read() failed");
		goto out;
	}

	ret = env_import(buf, 1);
	if (ret)
		gd->env_valid = 1;
out:
	spi_flash_free(env_flash);
	if (buf)
		free(buf);
	env_flash = NULL;
}

void env_relocate_spec(void)
{
#if !defined(ENV_IS_EMBEDDED)
	int crc1_ok = 0, crc2_ok = 0;
	env_t *ep, *tmp_env1, *tmp_env2;

	tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
	tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
	if (tmp_env1 == NULL || tmp_env2 == NULL) {
		puts("Can't allocate buffers for environment\n");
		set_default_env("!malloc() failed");
		goto done;
	}

	if (readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1))
		puts("No Valid Environment Area found\n");

	if (readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
		puts("No Valid Redundant Environment Area found\n");

	crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc;
	crc2_ok = crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc;

	if (!crc1_ok && !crc2_ok) {
		set_default_env("!bad CRC");
		goto done;
	} else if (crc1_ok && !crc2_ok) {
		gd->env_valid = 1;
	} else if (!crc1_ok && crc2_ok) {
		gd->env_valid = 2;
	} else {
		/* both ok - check serial */
		if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
			gd->env_valid = 2;
		else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
			gd->env_valid = 1;
		else if (tmp_env1->flags > tmp_env2->flags)
			gd->env_valid = 1;
		else if (tmp_env2->flags > tmp_env1->flags)
			gd->env_valid = 2;
		else /* flags are equal - almost impossible */
			gd->env_valid = 1;
	}

	free(env_ptr);

	if (gd->env_valid == 1)
		ep = tmp_env1;
	else
		ep = tmp_env2;

	env_flags = ep->flags;
	env_import((char *)ep, 0);

done:
	free(tmp_env1);
	free(tmp_env2);

#endif /* ! ENV_IS_EMBEDDED */
}

/*
 * Check if CRC is valid and (if yes) import the environment.
 * Note that "buf" may or may not be aligned.
 */
int env_import(const char *buf, int check)
{
	env_t *ep = (env_t *)buf;

	if (check) {
		uint32_t crc;

		memcpy(&crc, &ep->crc, sizeof(crc));

		if (crc32(0, ep->data, ENV_SIZE) != crc) {
			set_default_env("!bad CRC");
			return 0;
		}
	}

	if (himport((char *)ep->data, ENV_SIZE, '\0', 0)) {
		gd->flags |= GD_FLG_ENV_READY;
		return 1;
	}

	error("Cannot import environment: errno = %d\n", errno);

	set_default_env("!import failed");

	return 0;
}

void env_relocate_spec(void)
{
	char buf[CONFIG_ENV_SIZE];
	int ret;

	env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
	if (!env_flash) {
		set_default_env("!spi_flash_probe() failed");
		return;
	}

	ret = spi_flash_read(env_flash,
		CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
	if (ret) {
		set_default_env("!spi_flash_read() failed");
		goto out;
	}

	ret = env_import(buf, 1);
	if (ret)
		gd->env_valid = 1;
out:
	spi_flash_free(env_flash);
	env_flash = NULL;
}

	/*
	 * In case we have restarted u-boot there is a chance that buffer
	 * contains old environment (from the previous boot).
	 * If UBI volume is zero size, ubi_volume_read() doesn't modify the
	 * buffer.
	 * We need to clear buffer manually here, so the invalid CRC will
	 * cause setting default environment as expected.
	 */
	memset(env1_buf, 0x0, CONFIG_ENV_SIZE);
	memset(env2_buf, 0x0, CONFIG_ENV_SIZE);

	tmp_env1 = (env_t *)env1_buf;
	tmp_env2 = (env_t *)env2_buf;

	if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
		printf("\n** Cannot find mtd partition \"%s\"\n",
		       CONFIG_ENV_UBI_PART);
		set_default_env(NULL);
		return -EIO;
	}

	read1_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME, (void *)tmp_env1,
				     CONFIG_ENV_SIZE);
	if (read1_fail)
		printf("\n** Unable to read env from %s:%s **\n",
		       CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);

	read2_fail = ubi_volume_read(CONFIG_ENV_UBI_VOLUME_REDUND,
				     (void *)tmp_env2, CONFIG_ENV_SIZE);
	if (read2_fail)
		printf("\n** Unable to read redundant env from %s:%s **\n",
		       CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME_REDUND);

	return env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
							 read2_fail);
}
#else /* ! CONFIG_SYS_REDUNDAND_ENVIRONMENT */
static int env_ubi_load(void)
{
	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);

	/*
	 * In case we have restarted u-boot there is a chance that buffer
	 * contains old environment (from the previous boot).
	 * If UBI volume is zero size, ubi_volume_read() doesn't modify the
	 * buffer.
	 * We need to clear buffer manually here, so the invalid CRC will
	 * cause setting default environment as expected.
	 */
	memset(buf, 0x0, CONFIG_ENV_SIZE);

	if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
		printf("\n** Cannot find mtd partition \"%s\"\n",
		       CONFIG_ENV_UBI_PART);
		set_default_env(NULL);
		return -EIO;
	}

	if (ubi_volume_read(CONFIG_ENV_UBI_VOLUME, buf, CONFIG_ENV_SIZE)) {
		printf("\n** Unable to read env from %s:%s **\n",
		       CONFIG_ENV_UBI_PART, CONFIG_ENV_UBI_VOLUME);
		set_default_env(NULL);
		return -EIO;
	}

	return env_import(buf, 1);
}

static int setup_flash_device(void)
{
#ifdef CONFIG_DM_SPI_FLASH
	struct udevice *new;
	int	ret;

	/* speed and mode will be read from DT */
	ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
				     0, 0, &new);
	if (ret) {
		set_default_env("!spi_flash_probe_bus_cs() failed");
		return ret;
	}

	env_flash = dev_get_uclass_priv(new);
#else

	if (!env_flash) {
		env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
			CONFIG_ENV_SPI_CS,
			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
		if (!env_flash) {
			set_default_env("!spi_flash_probe() failed");
			return -EIO;
		}
	}
#endif
	return 0;
}

/*
 * The legacy NAND code saved the environment in the first NAND
 * device i.e., nand_dev_desc + 0. This is also the behaviour using
 * the new NAND code.
 */
void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED)
	int ret;
	char buf[CONFIG_ENV_SIZE];

#if defined(CONFIG_ENV_OFFSET_OOB)
	ret = get_nand_env_oob(&nand_info[0], &nand_env_oob_offset);
	/*
	 * If unable to read environment offset from NAND OOB then fall through
	 * to the normal environment reading code below
	 */
	if (!ret) {
		printf("Found Environment offset in OOB..\n");
	} else {
		set_default_env("!no env offset in OOB");
		return;
	}
#endif

	ret = readenv(CONFIG_ENV_OFFSET, (u_char *)buf);
	if (ret) {
		set_default_env("!readenv() failed");
		return;
	}

	env_import(buf, 1);
#endif /* ! ENV_IS_EMBEDDED */
}

static int env_sf_load(void)
{
	int ret;
	char *buf = NULL;

	buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
	if (!buf) {
		set_default_env("!malloc() failed");
		return -EIO;
	}

	ret = setup_flash_device();
	if (ret)
		goto out;

	ret = spi_flash_read(env_flash,
		CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
	if (ret) {
		set_default_env("!spi_flash_read() failed");
		goto err_read;
	}

	ret = env_import(buf, 1);
	if (!ret)
		gd->env_valid = ENV_VALID;

err_read:
	spi_flash_free(env_flash);
	env_flash = NULL;
out:
	free(buf);

	return ret;
}

/*
 * Check if CRC is valid and (if yes) import the environment.
 * Note that "buf" may or may not be aligned.
 */
int env_import(const char *buf, int check)
{
	env_t *ep = (env_t *)buf;

	if (check) {
		uint32_t crc;

		memcpy(&crc, &ep->crc, sizeof(crc));

		if (crc32(0, ep->data, ENV_SIZE) != crc) {
			set_default_env("bad CRC", 0);
			return -EIO;
		}
	}

	if (himport_r(&env_htab, (char *)ep->data, ENV_SIZE, '\0', 0, 0,
			0, NULL)) {
		gd->flags |= GD_FLG_ENV_READY;
		return 0;
	}

	pr_err("Cannot import environment: errno = %d\n", errno);

	set_default_env("import failed", 0);

	return -EIO;
}

void env_relocate_spec(void)
{
	int ret;
    char buf[CONFIG_ENV_SIZE];
    env_t *tmp_env;

    tmp_env = (env_t*)buf;

	env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
	if (!env_flash) {
		set_default_env("!spi_flash_probe() failed");
		return;
	}

	ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
				CONFIG_ENV_SIZE, tmp_env);
	if (ret) {
		set_default_env("!spi_flash_read() failed");
		goto out;
	}

	if (crc32(0, tmp_env->data, ENV_SIZE) == tmp_env->crc) {
		gd->env_valid = 1;
	} else {
		ret = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
					CONFIG_ENV_SIZE, tmp_env);
		if (ret) {
			set_default_env("!spi_flash_read() failed");
			goto out;
		}
		if (crc32(0, tmp_env->data, ENV_SIZE) != tmp_env->crc) {
			set_default_env("!both CRC failed");
			goto out;
		}
		gd->env_valid = 2;
	}

	ret = env_import(buf, 0);
	if (!ret) {
		error("Cannot import environment: errno = %d\n", errno);
		set_default_env("env_import failed");
	}

out:
	spi_flash_free(env_flash);
	env_flash = NULL;
}

void env_relocate(void)
{
#if defined(CONFIG_NEEDS_MANUAL_RELOC)
	env_reloc();
#endif
	if (gd->env_valid == 0) {
#if defined(CONFIG_ENV_IS_NOWHERE)	/* Environment not changable */
		set_default_env(NULL);
#else
		bootstage_error(BOOTSTAGE_ID_NET_CHECKSUM);
		set_default_env("!bad CRC");
#endif
	} else {
		env_relocate_spec();
	}
}

void spi_env_relocate_spec(void)
{
	int ret;
    env_t env_buf;
    
	env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
	if (!env_flash)
		goto err_probe;

	ret = spi_flash_read(env_flash, CONFIG_ENV_IN_SPI_OFFSET, CONFIG_ENV_SIZE, &env_buf);
	if (ret)
		goto err_read;

		env_import(&env_buf, 1);
		gd->env_valid = 1;

		return;

err_read:
	spi_flash_free(env_flash);
	env_flash = NULL;
err_probe:
//err_crc:
	set_default_env("!bad CRC");
}

void env_relocate(void)
{
#if defined(CONFIG_NEEDS_MANUAL_RELOC)
	env_reloc();
#endif
	if (gd->env_valid == 0) {
#if defined(CONFIG_ENV_IS_NOWHERE)	/* Environment not changable */
		set_default_env(NULL);
#else
		show_boot_progress(-60);
		set_default_env("!bad CRC");
#endif
	} else {
		env_relocate_spec();
	}
}