image.c

来自「uboot详细解读可用启动引导LINUX2.6内核」· C语言 代码 · 共 2,365 行 · 第 1/5 页

			printf ("unavailable\n");
		else
			printf ("0x%08lx\n", entry);
	}

	/* Process all hash subnodes of the component image node */
	for (ndepth = 0, noffset = fdt_next_node (fit, image_noffset, &ndepth);
	     (noffset >= 0) && (ndepth > 0);
	     noffset = fdt_next_node (fit, noffset, &ndepth)) {
		if (ndepth == 1) {
			/* Direct child node of the component image node */
			fit_image_print_hash (fit, noffset, p);
		}
	}
}

/**
 * fit_image_print_hash - prints out the hash node details
 * @fit: pointer to the FIT format image header
 * @noffset: offset of the hash node
 * @p: pointer to prefix string
 *
 * fit_image_print_hash() lists properies for the processed hash node
 *
 * returns:
 *     no returned results
 */
void fit_image_print_hash (const void *fit, int noffset, const char *p)
{
	char *algo;
	uint8_t *value;
	int value_len;
	int i, ret;

	/*
	 * Check subnode name, must be equal to "hash".
	 * Multiple hash nodes require unique unit node
	 * names, e.g. hash@1, hash@2, etc.
	 */
	if (strncmp (fit_get_name(fit, noffset, NULL),
			FIT_HASH_NODENAME,
			strlen(FIT_HASH_NODENAME)) != 0)
		return;

	debug ("%s  Hash node:    '%s'\n", p,
			fit_get_name (fit, noffset, NULL));

	printf ("%s  Hash algo:    ", p);
	if (fit_image_hash_get_algo (fit, noffset, &algo)) {
		printf ("invalid/unsupported\n");
		return;
	}
	printf ("%s\n", algo);

	ret = fit_image_hash_get_value (fit, noffset, &value,
					&value_len);
	printf ("%s  Hash value:   ", p);
	if (ret) {
		printf ("unavailable\n");
	} else {
		for (i = 0; i < value_len; i++)
			printf ("%02x", value[i]);
		printf ("\n");
	}

	debug  ("%s  Hash len:     %d\n", p, value_len);
}

/**
 * fit_get_desc - get node description property
 * @fit: pointer to the FIT format image header
 * @noffset: node offset
 * @desc: double pointer to the char, will hold pointer to the descrption
 *
 * fit_get_desc() reads description property from a given node, if
 * description is found pointer to it is returened in third call argument.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_get_desc (const void *fit, int noffset, char **desc)
{
	int len;

	*desc = (char *)fdt_getprop (fit, noffset, FIT_DESC_PROP, &len);
	if (*desc == NULL) {
		fit_get_debug (fit, noffset, FIT_DESC_PROP, len);
		return -1;
	}

	return 0;
}

/**
 * fit_get_timestamp - get node timestamp property
 * @fit: pointer to the FIT format image header
 * @noffset: node offset
 * @timestamp: pointer to the time_t, will hold read timestamp
 *
 * fit_get_timestamp() reads timestamp poperty from given node, if timestamp
 * is found and has a correct size its value is retured in third call
 * argument.
 *
 * returns:
 *     0, on success
 *     -1, on property read failure
 *     -2, on wrong timestamp size
 */
int fit_get_timestamp (const void *fit, int noffset, time_t *timestamp)
{
	int len;
	const void *data;

	data = fdt_getprop (fit, noffset, FIT_TIMESTAMP_PROP, &len);
	if (data == NULL) {
		fit_get_debug (fit, noffset, FIT_TIMESTAMP_PROP, len);
		return -1;
	}
	if (len != sizeof (uint32_t)) {
		debug ("FIT timestamp with incorrect size of (%u)\n", len);
		return -2;
	}

	*timestamp = uimage_to_cpu (*((uint32_t *)data));
	return 0;
}

/**
 * fit_image_get_node - get node offset for component image of a given unit name
 * @fit: pointer to the FIT format image header
 * @image_uname: component image node unit name
 *
 * fit_image_get_node() finds a component image (withing the '/images'
 * node) of a provided unit name. If image is found its node offset is
 * returned to the caller.
 *
 * returns:
 *     image node offset when found (>=0)
 *     negative number on failure (FDT_ERR_* code)
 */
int fit_image_get_node (const void *fit, const char *image_uname)
{
	int noffset, images_noffset;

	images_noffset = fdt_path_offset (fit, FIT_IMAGES_PATH);
	if (images_noffset < 0) {
		debug ("Can't find images parent node '%s' (%s)\n",
			FIT_IMAGES_PATH, fdt_strerror (images_noffset));
		return images_noffset;
	}

	noffset = fdt_subnode_offset (fit, images_noffset, image_uname);
	if (noffset < 0) {
		debug ("Can't get node offset for image unit name: '%s' (%s)\n",
			image_uname, fdt_strerror (noffset));
	}

	return noffset;
}

/**
 * fit_image_get_os - get os id for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @os: pointer to the uint8_t, will hold os numeric id
 *
 * fit_image_get_os() finds os property in a given component image node.
 * If the property is found, its (string) value is translated to the numeric
 * id which is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_os (const void *fit, int noffset, uint8_t *os)
{
	int len;
	const void *data;

	/* Get OS name from property data */
	data = fdt_getprop (fit, noffset, FIT_OS_PROP, &len);
	if (data == NULL) {
		fit_get_debug (fit, noffset, FIT_OS_PROP, len);
		*os = -1;
		return -1;
	}

	/* Translate OS name to id */
	*os = genimg_get_os_id (data);
	return 0;
}

/**
 * fit_image_get_arch - get arch id for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @arch: pointer to the uint8_t, will hold arch numeric id
 *
 * fit_image_get_arch() finds arch property in a given component image node.
 * If the property is found, its (string) value is translated to the numeric
 * id which is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_arch (const void *fit, int noffset, uint8_t *arch)
{
	int len;
	const void *data;

	/* Get architecture name from property data */
	data = fdt_getprop (fit, noffset, FIT_ARCH_PROP, &len);
	if (data == NULL) {
		fit_get_debug (fit, noffset, FIT_ARCH_PROP, len);
		*arch = -1;
		return -1;
	}

	/* Translate architecture name to id */
	*arch = genimg_get_arch_id (data);
	return 0;
}

/**
 * fit_image_get_type - get type id for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @type: pointer to the uint8_t, will hold type numeric id
 *
 * fit_image_get_type() finds type property in a given component image node.
 * If the property is found, its (string) value is translated to the numeric
 * id which is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_type (const void *fit, int noffset, uint8_t *type)
{
	int len;
	const void *data;

	/* Get image type name from property data */
	data = fdt_getprop (fit, noffset, FIT_TYPE_PROP, &len);
	if (data == NULL) {
		fit_get_debug (fit, noffset, FIT_TYPE_PROP, len);
		*type = -1;
		return -1;
	}

	/* Translate image type name to id */
	*type = genimg_get_type_id (data);
	return 0;
}

/**
 * fit_image_get_comp - get comp id for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @comp: pointer to the uint8_t, will hold comp numeric id
 *
 * fit_image_get_comp() finds comp property in a given component image node.
 * If the property is found, its (string) value is translated to the numeric
 * id which is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_comp (const void *fit, int noffset, uint8_t *comp)
{
	int len;
	const void *data;

	/* Get compression name from property data */
	data = fdt_getprop (fit, noffset, FIT_COMP_PROP, &len);
	if (data == NULL) {
		fit_get_debug (fit, noffset, FIT_COMP_PROP, len);
		*comp = -1;
		return -1;
	}

	/* Translate compression name to id */
	*comp = genimg_get_comp_id (data);
	return 0;
}

/**
 * fit_image_get_load - get load address property for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @load: pointer to the uint32_t, will hold load address
 *
 * fit_image_get_load() finds load address property in a given component image node.
 * If the property is found, its value is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_load (const void *fit, int noffset, ulong *load)
{
	int len;
	const uint32_t *data;

	data = fdt_getprop (fit, noffset, FIT_LOAD_PROP, &len);
	if (data == NULL) {
		fit_get_debug (fit, noffset, FIT_LOAD_PROP, len);
		return -1;
	}

	*load = uimage_to_cpu (*data);
	return 0;
}

/**
 * fit_image_get_entry - get entry point address property for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @entry: pointer to the uint32_t, will hold entry point address
 *
 * fit_image_get_entry() finds entry point address property in a given component image node.
 * If the property is found, its value is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_entry (const void *fit, int noffset, ulong *entry)
{
	int len;
	const uint32_t *data;

	data = fdt_getprop (fit, noffset, FIT_ENTRY_PROP, &len);
	if (data == NULL) {
		fit_get_debug (fit, noffset, FIT_ENTRY_PROP, len);
		return -1;
	}

	*entry = uimage_to_cpu (*data);
	return 0;
}

/**
 * fit_image_get_data - get data property and its size for a given component image node
 * @fit: pointer to the FIT format image header
 * @noffset: component image node offset
 * @data: double pointer to void, will hold data property's data address
 * @size: pointer to size_t, will hold data property's data size
 *
 * fit_image_get_data() finds data property in a given component image node.
 * If the property is found its data start address and size are returned to
 * the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_get_data (const void *fit, int noffset,
		const void **data, size_t *size)
{
	int len;

	*data = fdt_getprop (fit, noffset, FIT_DATA_PROP, &len);
	if (*data == NULL) {
		fit_get_debug (fit, noffset, FIT_DATA_PROP, len);
		*size = 0;
		return -1;
	}

	*size = len;
	return 0;
}

/**
 * fit_image_hash_get_algo - get hash algorithm name
 * @fit: pointer to the FIT format image header
 * @noffset: hash node offset
 * @algo: double pointer to char, will hold pointer to the algorithm name
 *
 * fit_image_hash_get_algo() finds hash algorithm property in a given hash node.
 * If the property is found its data start address is returned to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_hash_get_algo (const void *fit, int noffset, char **algo)
{
	int len;

	*algo = (char *)fdt_getprop (fit, noffset, FIT_ALGO_PROP, &len);
	if (*algo == NULL) {
		fit_get_debug (fit, noffset, FIT_ALGO_PROP, len);
		return -1;
	}

	return 0;
}

/**
 * fit_image_hash_get_value - get hash value and length
 * @fit: pointer to the FIT format image header
 * @noffset: hash node offset
 * @value: double pointer to uint8_t, will hold address of a hash value data
 * @value_len: pointer to an int, will hold hash data length
 *
 * fit_image_hash_get_value() finds hash value property in a given hash node.
 * If the property is found its data start address and size are returned to
 * the caller.
 *
 * returns:
 *     0, on success
 *     -1, on failure
 */
int fit_image_hash_get_value (const void *fit, int noffset, uint8_t **value,
				int *value_len)
{
	int len;

	*value = (uint8_t *)fdt_getprop (fit, noffset, FIT_VALUE_PROP, &len);
	if (*value == NULL) {
		fit_get_debug (fit, noffset, FIT_VALUE_PROP, len);
		*value_len = 0;
		return -1;
	}

	*value_len = len;
	return 0;
}

/**
 * fit_set_timestamp - set node timestamp property
 * @fit: pointer to the FIT format image header
 * @noffset: node offset
 * @timestamp: timestamp value to be set
 *
 * fit_set_timestamp() attempts to set timestamp property in the requested
 * node and returns operation status to the caller.
 *
 * returns:
 *     0, on success
 *     -1, on property read failure
 */
int fit_set_timestamp (void *fit, int noffset, time_t timestamp)
{
	uint32_t t;
	int ret;

	t = cpu_to_uimage (timestamp);
	ret = fdt_setprop (fit, noffset, FIT_TIMESTAMP_PROP, &t,
				sizeof (uint32_t));
	if (ret) {
		printf ("Can't set '%s' property for '%s' node (%s)\n",
			FIT_TIMESTAMP_PROP, fit_get_name (fit, noffset, NULL),
			fdt_strerror (ret));
		return -1;
	}

	return 0;
}

/**
 * calculate_hash - calculate and return hash for provided input data
 * @data: pointer to the input data
 * @data_len: data length
 * @algo: requested hash algorithm
 * @value: pointer to the char, will hold hash value data (caller must
 * allocate enough free space)
 * value_len: length of the calculated hash
 *