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/**
* @file
*
* @ingroup rtems_ramdisk
*
* @brief RAM disk block device implementation.
*/
/*
* Copyright (c) 2009-2012 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems.h>
#include <rtems/ramdisk.h>
const rtems_driver_address_table ramdisk_ops = {
.initialization_entry = NULL,
RTEMS_GENERIC_BLOCK_DEVICE_DRIVER_ENTRIES
};
rtems_status_code ramdisk_register(
uint32_t media_block_size,
rtems_blkdev_bnum media_block_count,
bool trace,
const char *disk,
dev_t *dev_ptr
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_device_major_number major = 0;
ramdisk *rd = NULL;
dev_t dev = 0;
sc = rtems_io_register_driver(0, &ramdisk_ops, &major);
if (sc != RTEMS_SUCCESSFUL) {
return RTEMS_UNSATISFIED;
}
rd = ramdisk_allocate(NULL, media_block_size, media_block_count, trace);
if (rd == NULL) {
rtems_io_unregister_driver(major);
return RTEMS_UNSATISFIED;
}
dev = rtems_filesystem_make_dev_t(major, 0);
sc = rtems_disk_create_phys(
dev,
media_block_size,
media_block_count,
ramdisk_ioctl,
rd,
disk
);
if (sc != RTEMS_SUCCESSFUL) {
ramdisk_free(rd);
rtems_io_unregister_driver(major);
return RTEMS_UNSATISFIED;
}
*dev_ptr = dev;
return RTEMS_SUCCESSFUL;
}
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