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/**
* @file
*
* @brief RTEMS Create Port
* @ingroup ClassicDPMEM
*/
/*
* COPYRIGHT (c) 1989-2014.
* On-Line Applications Research Corporation (OAR).
*
* 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/support.h>
#include <rtems/score/address.h>
#include <rtems/rtems/dpmemimpl.h>
#include <rtems/score/thread.h>
rtems_status_code rtems_port_create(
rtems_name name,
void *internal_start,
void *external_start,
uint32_t length,
rtems_id *id
)
{
Dual_ported_memory_Control *the_port;
if ( !rtems_is_name_valid( name ) )
return RTEMS_INVALID_NAME;
if ( !id )
return RTEMS_INVALID_ADDRESS;
if ( !_Addresses_Is_aligned( internal_start ) ||
!_Addresses_Is_aligned( external_start ) )
return RTEMS_INVALID_ADDRESS;
_Thread_Disable_dispatch(); /* to prevent deletion */
the_port = _Dual_ported_memory_Allocate();
if ( !the_port ) {
_Thread_Enable_dispatch();
return RTEMS_TOO_MANY;
}
the_port->internal_base = internal_start;
the_port->external_base = external_start;
the_port->length = length - 1;
_Objects_Open(
&_Dual_ported_memory_Information,
&the_port->Object,
(Objects_Name) name
);
*id = the_port->Object.id;
_Thread_Enable_dispatch();
return RTEMS_SUCCESSFUL;
}
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