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/*
* YAFFS port to RTEMS
*
* Copyright (C) 2010 Sebastien Bourdeauducq
* Copyright (C) 2011 Stephan Hoffmann <sho@reLinux.de>
* Copyright (C) 2011 embedded brains GmbH <rtems@embedded-brains.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* As a special exception, including this header in a file does not by
* itself cause the resulting executable application to be covered by the
* GNU General Public License.
* This exception does not however invalidate any other reasons why the
* executable file might be covered by the GNU Public License. In particular,
* the other YAFFS files are not covered by this exception, and using them
* in a proprietary application requires a paid license from Aleph One.
*/
#ifndef __RTEMS_YAFFS_H
#define __RTEMS_YAFFS_H
#include <rtems.h>
#include <rtems/fs.h>
#include "yportenv.h"
#include "yaffs_guts.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @defgroup rtems_yaffs YAFFS Support for RTEMS
*
*
* @{
*/
#define RTEMS_FILESYSTEM_TYPE_YAFFS "yaffs"
typedef void (*rtems_yaffs_os_handler)(
struct yaffs_dev *dev,
void *os_context
);
/**
* @brief Per YAFFS file system instance context.
*/
typedef struct {
rtems_yaffs_os_handler lock;
rtems_yaffs_os_handler unlock;
rtems_yaffs_os_handler unmount;
} rtems_yaffs_os_context;
/**
* @brief Default per YAFFS file system instance context.
*/
typedef struct {
rtems_yaffs_os_context os_context;
rtems_id semaphore_id;
} rtems_yaffs_default_os_context;
/**
* @brief Data for YAFFS mount handler.
*
* @see rtems_yaffs_mount_handler()
*/
typedef struct {
/**
* @brief YAFFS device of the file system instance.
*
* The @a param field has to be completely set up. The
* @a driver_context can point to arbitrary driver specific
* information. The @a os_context must point to an initialized
* structure that begins with a rtems_yaffs_os_context structure.
*/
struct yaffs_dev *dev;
} rtems_yaffs_mount_data;
/**
* @brief YAFFS mount handler.
*
* The @a data pointer must point to a completely initizialized
* rtems_yaffs_mount_data structure. The ownership of the YAFFS device
* structure changes. This structure is now owned by the file system layer.
*
* @retval 0 Successful operation.
* @retval -1 An error occured. The @c errno indicates the error.
*/
int rtems_yaffs_mount_handler(
rtems_filesystem_mount_table_entry_t *mt_entry,
const void *data
);
/**
* @brief Initializes the default per file system context @a os_context.
*
* A binary semaphore with priority inheritence will be used to ensure mutual
* exclusion.
*
* The umount handler will release all resources of the default context.
*
* @retval 0 Successful operation.
* @retval -1 An error occured. The @c errno indicates the error.
*/
int rtems_yaffs_initialize_default_os_context(
rtems_yaffs_default_os_context *os_context
);
/** @} */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __RTEMS_YAFFS_H */
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