rtems_status_code rtems_port_internal_to_external(
rtems_id id,
void *internal,
void **external
)
{
register 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 );
_Thread_Enable_dispatch();
return RTEMS_SUCCESSFUL;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE: /* this error cannot be returned */
#endif
case OBJECTS_ERROR:
break;
}
return RTEMS_INVALID_ID;
}
rtems_status_code rtems_port_internal_to_external(
rtems_id id,
void *internal,
void **external
)
{
Dual_ported_memory_Control *the_port;
ISR_lock_Context lock_context;
uint32_t ending;
if ( external == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
the_port = _Dual_ported_memory_Get( id, &lock_context );
if ( the_port == NULL ) {
return RTEMS_INVALID_ID;
}
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 );
}
_ISR_lock_ISR_enable( &lock_context );
return RTEMS_SUCCESSFUL;
}