/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSImplClassicDPMem
*
* @brief This source file contains the implementation of
* rtems_port_external_to_internal().
*/
/*
* COPYRIGHT (c) 1989-2014.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/dpmemimpl.h>
#include <rtems/score/address.h>
rtems_status_code rtems_port_external_to_internal(
rtems_id id,
void *external,
void **internal
)
{
Dual_ported_memory_Control *the_port;
ISR_lock_Context lock_context;
uintptr_t length;
if ( internal == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
the_port = _Dual_ported_memory_Get( id, &lock_context );
if ( the_port == NULL ) {
return RTEMS_INVALID_ID;
}
length = (uintptr_t) _Addresses_Subtract( external, the_port->external_base );
if ( length > the_port->length ) {
*internal = external;
} else {
*internal = _Addresses_Add_offset( the_port->internal_base, length );
}
_ISR_lock_ISR_enable( &lock_context );
return RTEMS_SUCCESSFUL;
}