76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
|
|
* MTD partitioning layer definitions
|
|
*
|
|
* (C) 2000 Nicolas Pitre <nico@cam.org>
|
|
*
|
|
* This code is GPL
|
|
*
|
|
* $Id: partitions.h,v 1.17 2005/11/07 11:14:55 gleixner Exp $
|
|
*/
|
|
|
|
#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
|
|
* add_mtd_partitions() 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.
|
|
* 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 */
|
|
u_int32_t size; /* partition size */
|
|
u_int32_t offset; /* offset within the master MTD space */
|
|
u_int32_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)*/
|
|
struct mtd_info **mtdp; /* pointer to store the MTD object */
|
|
};
|
|
|
|
#define MTDPART_OFS_NXTBLK (-2)
|
|
#define MTDPART_OFS_APPEND (-1)
|
|
#define MTDPART_SIZ_FULL (0)
|
|
|
|
|
|
int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int);
|
|
int del_mtd_partitions(struct mtd_info *);
|
|
|
|
/*
|
|
* 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 **, unsigned long);
|
|
};
|
|
|
|
extern int register_mtd_parser(struct mtd_part_parser *parser);
|
|
extern int deregister_mtd_parser(struct mtd_part_parser *parser);
|
|
extern int parse_mtd_partitions(struct mtd_info *master, const char **types,
|
|
struct mtd_partition **pparts, unsigned long origin);
|
|
|
|
#define put_partition_parser(p) do { module_put((p)->owner); } while(0)
|
|
|
|
#endif
|
|
|