Edit File: partitions.h
/* * MTD partitioning layer definitions * * (C) 2000 Nicolas Pitre <nico@fluxnic.net> * * This code is GPL */ #ifndef MTD_PARTITIONS_H #define MTD_PARTITIONS_H #include <linux/types.h> /* * Partition definition structure: * * An array of struct partition is passed along with a MTD object to * mtd_device_register() to create them. * * For each partition, these fields are available: * name: string that will be used to label the partition's MTD device. * size: the partition size; if defined as MTDPART_SIZ_FULL, the partition * will extend to the end of the master MTD device. * offset: absolute starting position within the master MTD device; if * defined as MTDPART_OFS_APPEND, the partition will start where the * previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block; * if MTDPART_OFS_RETAIN, consume as much as possible, leaving size * after the end of partition. * mask_flags: contains flags that have to be masked (removed) from the * master MTD flag set for the corresponding MTD partition. * For example, to force a read-only partition, simply adding * MTD_WRITEABLE to the mask_flags will do the trick. * * Note: writeable partitions require their size and offset be * erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK). */ struct mtd_partition { char *name; /* identifier string */ uint64_t size; /* partition size */ uint64_t offset; /* offset within the master MTD space */ uint32_t mask_flags; /* master MTD flags to mask out for this partition */ struct nand_ecclayout *ecclayout; /* out of band layout for this partition (NAND only) */ }; #define MTDPART_OFS_RETAIN (-3) #define MTDPART_OFS_NXTBLK (-2) #define MTDPART_OFS_APPEND (-1) #define MTDPART_SIZ_FULL (0) struct mtd_info; struct device_node; /** * struct mtd_part_parser_data - used to pass data to MTD partition parsers. * @origin: for RedBoot, start address of MTD device * @of_node: for OF parsers, device node containing partitioning information */ struct mtd_part_parser_data { unsigned long origin; struct device_node *of_node; }; /* * Functions dealing with the various ways of partitioning the space */ struct mtd_part_parser { struct list_head list; struct module *owner; const char *name; int (*parse_fn)(struct mtd_info *, struct mtd_partition **, struct mtd_part_parser_data *); }; extern int register_mtd_parser(struct mtd_part_parser *parser); extern int deregister_mtd_parser(struct mtd_part_parser *parser); int mtd_is_partition(const struct mtd_info *mtd); int mtd_add_partition(struct mtd_info *master, char *name, long long offset, long long length); int mtd_del_partition(struct mtd_info *master, int partno); uint64_t mtd_get_device_size(const struct mtd_info *mtd); #endif