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-rw-r--r--kernel/include/linux/mtd/partitions.h88
1 files changed, 88 insertions, 0 deletions
diff --git a/kernel/include/linux/mtd/partitions.h b/kernel/include/linux/mtd/partitions.h
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+++ b/kernel/include/linux/mtd/partitions.h
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+/*
+ * 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;
+
+/**
+ * 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);
+
+int mtd_is_partition(const struct mtd_info *mtd);
+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);
+
+#endif