111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
|
/*
|
||
|
|
* 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 {
|
||
|
|
const 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;
|
||
|
|
|
||
|
|
#ifndef __UBOOT__
|
||
|
|
/**
|
||
|
|
* 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 void register_mtd_parser(struct mtd_part_parser *parser);
|
||
|
|
extern void deregister_mtd_parser(struct mtd_part_parser *parser);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int mtd_add_partition(struct mtd_info *master, const 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);
|
||
|
|
|
||
|
|
#if defined(CONFIG_MTD_PARTITIONS)
|
||
|
|
int mtd_parse_partitions(struct mtd_info *parent, const char **_mtdparts,
|
||
|
|
struct mtd_partition **_parts, int *_nparts);
|
||
|
|
void mtd_free_parsed_partitions(struct mtd_partition *parts,
|
||
|
|
unsigned int nparts);
|
||
|
|
#else
|
||
|
|
static inline int
|
||
|
|
mtd_parse_partitions(struct mtd_info *parent, const char **_mtdparts,
|
||
|
|
struct mtd_partition **_parts, int *_nparts)
|
||
|
|
{
|
||
|
|
*_nparts = 0;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
static inline void
|
||
|
|
mtd_free_parsed_partitions(struct mtd_partition *parts, unsigned int nparts)
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
#endif /* defined(MTD_PARTITIONS) */
|
||
|
|
|
||
|
|
#endif
|