+/* Fwd decl */
+struct BattFsSuper;
+
+/**
+ * Type interface for disk init function.
+ * \return true if all is ok, false otherwise.
+ */
+typedef bool (*disk_init_t) (struct BattFsSuper *d);
+
+/**
+ * Type interface for disk page read function.
+ * \a page is the page address, \a size the lenght to be read.
+ * \return the number of bytes read.
+ */
+typedef size_t (*disk_page_read_t) (struct BattFsSuper *d, void *buf, battfs_page_t page, size_t size);
+
+/**
+ * Type interface for disk page write function.
+ * \a page is the page address, \a size the lenght to be written.
+ * \return the number of bytes written.
+ */
+typedef size_t (*disk_page_write_t) (struct BattFsSuper *d, const void *buf, battfs_page_t page, size_t size);
+
+/**
+ * Type interface for disk page erase function.
+ * \a page is the page address.
+ * \return true if all is ok, false otherwise.
+ */
+typedef bool (*disk_page_erase_t) (struct BattFsSuper *d, battfs_page_t page);
+
+typedef uint32_t disk_size_t ///< Type for disk sizes.
+
+/**
+ * Context used to describe a disk.
+ * This context structure will be used to access disk.
+ * Must be initialized by hw memory driver.
+ */
+typedef struct BattFsSuper
+{
+ disk_init_t init; ///< Disk init.
+ disk_page_read_t read; ///< Page read.
+ disk_page_write_t write; ///< Page write.
+ disk_page_erase_t erase; ///< Page erase.
+
+ disk_size_t disk_size; ///< Size of the disk, in bytes.
+ disk_size_t free_bytes; ///< Free space on the disk.
+ /* TODO add other fields. */
+} BattFsSuper;