ramdisk.h

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/*
 * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia
 * Author: Victor V. Vengerov <vvv@oktet.ru>
 */
 
#ifndef _RTEMS_RAMDISK_H
#define _RTEMS_RAMDISK_H
 
 
#include <rtems.h>
#include <rtems/blkdev.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct rtems_ramdisk_config {
  uint32_t block_size;
 
  rtems_blkdev_bnum block_num;
 
  void *location;
} rtems_ramdisk_config;
 
extern rtems_ramdisk_config rtems_ramdisk_configuration [];
 
extern size_t rtems_ramdisk_configuration_size;
 
rtems_device_driver ramdisk_initialize(
 rtems_device_major_number major,
 rtems_device_minor_number minor,
 void *arg
);
 
#define RAMDISK_DRIVER_TABLE_ENTRY \
  { \
    ramdisk_initialize, \
    NULL, NULL, NULL, NULL, NULL \
  }
 
#define RAMDISK_DEVICE_BASE_NAME "/dev/rd"
 
typedef struct ramdisk {
  uint32_t block_size;
 
  rtems_blkdev_bnum block_num;
 
  void *area;
 
  bool initialized;
 
  bool malloced;
 
  bool trace;
 
  bool free_at_delete_request;
} ramdisk;
 
int ramdisk_ioctl(rtems_disk_device *dd, uint32_t req, void *argp);
 
ramdisk *ramdisk_allocate(
  void *area_begin,
  uint32_t media_block_size,
  rtems_blkdev_bnum media_block_count,
  bool trace
);
 
void ramdisk_free(ramdisk *rd);
 
static inline void ramdisk_enable_free_at_delete_request(ramdisk *rd)
{
  rd->free_at_delete_request = true;
}
 
rtems_status_code ramdisk_register(
  uint32_t media_block_size,
  rtems_blkdev_bnum media_block_count,
  bool trace,
  const char *disk
);
 
#ifdef __cplusplus
}
#endif
 
#endif