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 1.1.1.1 2008/10/15 03:27:31 james26_jang 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
39struct 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
52int add_mtd_partitions(struct mtd_info *, struct mtd_partition *, int);
53int del_mtd_partitions(struct mtd_info *);
54
55#endif
56
57