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/**
* @file
*
* @ingroup rtems_ramdisk
*
* RAM disk block device.
*/
/*
* Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia
* Author: Victor V. Vengerov <vvv@oktet.ru>
*
* @(#) $Id$
*/
#ifndef _RTEMS_RAMDISK_H
#define _RTEMS_RAMDISK_H
#include <rtems.h>
#include <rtems/blkdev.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup rtems_ramdisk RAM Disk Device
*
* @ingroup rtems_blkdev
*
* @{
*/
/**
* RAM disk configuration table entry.
*/
typedef struct rtems_ramdisk_config {
/**
* RAM disk block size (must be a power of two).
*/
uint32_t block_size;
/**
* Number of blocks on this RAM disk.
*/
rtems_blkdev_bnum block_num;
/**
* RAM disk location or @c NULL if RAM disk memory should be allocated
* dynamically.
*/
void *location;
} rtems_ramdisk_config;
/**
* External reference to the RAM disk configuration table describing each RAM
* disk in the system.
*
* The configuration table is provided by the application.
*/
extern rtems_ramdisk_config rtems_ramdisk_configuration [];
/**
* External reference the size of the RAM disk configuration table
* @ref rtems_ramdisk_configuration.
*
* The configuration table size is provided by the application.
*/
extern size_t rtems_ramdisk_configuration_size;
/**
* RAM disk driver initialization entry point.
*/
rtems_device_driver ramdisk_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
);
/**
* RAM disk driver table entry.
*/
#define RAMDISK_DRIVER_TABLE_ENTRY \
{ \
.initialization_entry = ramdisk_initialize, \
RTEMS_GENERIC_BLOCK_DEVICE_DRIVER_ENTRIES \
}
/** @} */
#ifdef __cplusplus
}
#endif
#endif
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