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/**
* @file
*
* @brief RTEMS Port Internal to External
* @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_internal_to_external(
rtems_id id,
void *internal,
void **external
)
{
Dual_ported_memory_Control *the_port;
Objects_Locations location;
uint32_t ending;
if ( !external )
return RTEMS_INVALID_ADDRESS;
the_port = _Dual_ported_memory_Get( id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
ending = _Addresses_Subtract( internal, the_port->internal_base );
if ( ending > the_port->length )
*external = internal;
else
*external = _Addresses_Add_offset( the_port->external_base,
ending );
_Objects_Put( &the_port->Object );
return RTEMS_SUCCESSFUL;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE: /* this error cannot be returned */
#endif
case OBJECTS_ERROR:
break;
}
return RTEMS_INVALID_ID;
}
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