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/* ramdisk.c -- RAM disk block device implementation

 *

 * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia

 * Author: Victor V. Vengerov <vvv@oktet.ru>

 *

 * @(#) ramdisk.h,v 1.1 2002/02/28 20:39:54 joel Exp

 */

#ifndef __RTEMS_LIBBLOCK_RAMDISK_H__

#define __RTEMS_LIBBLOCK_RAMDISK_H__

#ifdef __cplusplus

extern "C" {

#endif

#include <rtems.h>

#include "rtems/blkdev.h"

/* RAM disk configuration table entry */

typedef struct rtems_ramdisk_config {

    int   block_size; /* RAM disk block size */

    int   block_num;  /* Number of blocks on this RAM disk */

    void *location;   /* RAM disk permanent location (out of RTEMS controlled

                         memory), or NULL if RAM disk memory should be

                         allocated dynamically */

} rtems_ramdisk_config;

/* If application want to use RAM disk, it should specify configuration of

 * available RAM disks.

 * The following is definitions for RAM disk configuration table

 */

extern rtems_ramdisk_config rtems_ramdisk_configuration[];

extern int rtems_ramdisk_configuration_size;

/* ramdisk_initialize --

 *     RAM disk driver initialization entry point.

 */

rtems_device_driver

ramdisk_initialize(

    rtems_device_major_number major,

    rtems_device_minor_number minor,

    void *arg);

#define RAMDISK_DRIVER_TABLE_ENTRY \

    { ramdisk_initialize, GENERIC_BLOCK_DEVICE_DRIVER_ENTRIES }

#ifdef __cplusplus

}

#endif

#endif