+/*
+ * image type specific variables and callback functions
+ */
+struct image_type_params {
+ /* name is an identification tag string for added support */
+ char *name;
+ /*
+ * header size is local to the specific image type to be supported,
+ * mkimage core treats this as number of bytes
+ */
+ uint32_t header_size;
+ /* Image type header pointer */
+ void *hdr;
+ /*
+ * There are several arguments that are passed on the command line
+ * and are registered as flags in mkimage_params structure.
+ * This callback function can be used to check the passed arguments
+ * are in-lined with the image type to be supported
+ *
+ * Returns 1 if parameter check is successful
+ */
+ int (*check_params) (struct mkimage_params *);
+ /*
+ * This function is used by list command (i.e. mkimage -l <filename>)
+ * image type verification code must be put here
+ *
+ * Returns 0 if image header verification is successful
+ * otherwise, returns respective negative error codes
+ */
+ int (*verify_header) (unsigned char *, int, struct mkimage_params *);
+ /* Prints image information abstracting from image header */
+ void (*print_header) (const void *);
+ /*
+ * The header or image contents need to be set as per image type to
+ * be generated using this callback function.
+ * further output file post processing (for ex. checksum calculation,
+ * padding bytes etc..) can also be done in this callback function.
+ */
+ void (*set_header) (void *, struct stat *, int,
+ struct mkimage_params *);
+ /*
+ * Some image generation support for ex (default image type) supports
+ * more than one type_ids, this callback function is used to check
+ * whether input (-T <image_type>) is supported by registered image
+ * generation/list low level code
+ */
+ int (*check_image_type) (uint8_t);
+ /* This callback function will be executed if fflag is defined */
+ int (*fflag_handle) (struct mkimage_params *);
+ /* pointer to the next registered entry in linked list */
+ struct image_type_params *next;
+};