1 /* 2 * MTD partitioning layer definitions 3 * 4 * (C) 2000 Nicolas Pitre <nico@cam.org> 5 * 6 * This code is GPL 7 * 8 * $Id: partitions.h,v 1.8 2002/03/08 16:34:36 rkaiser Exp $ 9 */ 10 11 #ifndef MTD_PARTITIONS_H 12 #define MTD_PARTITIONS_H 13 14 #include <linux/types.h> 15 16 17 /* 18 * Partition definition structure: 19 * 20 * An array of struct partition is passed along with a MTD object to 21 * add_mtd_partitions() to create them. 22 * 23 * For each partition, these fields are available: 24 * name: string that will be used to label the partition's MTD device. 25 * size: the partition size; if defined as MTDPART_SIZ_FULL, the partition 26 * will extend to the end of the master MTD device. 27 * offset: absolute starting position within the master MTD device; if 28 * defined as MTDPART_OFS_APPEND, the partition will start where the 29 * previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block. 30 * mask_flags: contains flags that have to be masked (removed) from the 31 * master MTD flag set for the corresponding MTD partition. 32 * For example, to force a read-only partition, simply adding 33 * MTD_WRITEABLE to the mask_flags will do the trick. 34 * 35 * Note: writeable partitions require their size and offset be 36 * erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK). 37 */ 38 39 struct mtd_partition { 40 char *name; /* identifier string */ 41 u_int32_t size; /* partition size */ 42 u_int32_t offset; /* offset within the master MTD space */ 43 u_int32_t mask_flags; /* master MTD flags to mask out for this partition */ 44 struct mtd_info **mtdp; /* pointer to store the MTD object */ 45 }; 46 47 #define MTDPART_OFS_NXTBLK (-2) 48 #define MTDPART_OFS_APPEND (-1) 49 #define MTDPART_SIZ_FULL (0) 50 51 52 int add_mtd_partitions(struct mtd_info *, struct mtd_partition *, int); 53 int del_mtd_partitions(struct mtd_info *); 54 55 #endif 56 57