/**
* @file
*
* @ingroup RTEMSImplClassicPartition
*
* @brief This source file contains the implementation of
* rtems_partition_create() and the Partition Manager system initialization.
*/
/*
* 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.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/partimpl.h>
#include <rtems/rtems/attrimpl.h>
#include <rtems/rtems/support.h>
#include <rtems/score/address.h>
#include <rtems/score/chainimpl.h>
#include <rtems/score/sysstate.h>
#include <rtems/sysinit.h>
static Partition_Control *_Partition_Allocate( void )
{
return (Partition_Control *) _Objects_Allocate( &_Partition_Information );
}
static void _Partition_Initialize(
Partition_Control *the_partition,
void *starting_address,
uintptr_t length,
size_t buffer_size,
rtems_attribute attribute_set
)
{
const void *limit_address;
limit_address = _Addresses_Add_offset( starting_address, length - 1 );
the_partition->base_address = starting_address;
the_partition->limit_address = limit_address;
the_partition->buffer_size = buffer_size;
the_partition->attribute_set = attribute_set;
the_partition->number_of_used_blocks = 0;
_Chain_Initialize(
&the_partition->Memory,
starting_address,
length / buffer_size,
buffer_size
);
_ISR_lock_Initialize( &the_partition->Lock, "Partition" );
}
rtems_status_code rtems_partition_create(
rtems_name name,
void *starting_address,
uintptr_t length,
size_t buffer_size,
rtems_attribute attribute_set,
rtems_id *id
)
{
Partition_Control *the_partition;
if ( !rtems_is_name_valid( name ) ) {
return RTEMS_INVALID_NAME;
}
if ( id == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
if ( starting_address == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
if ( length == 0 )
return RTEMS_INVALID_SIZE;
if ( buffer_size == 0 )
return RTEMS_INVALID_SIZE;
if ( length < buffer_size )
return RTEMS_INVALID_SIZE;
/*
* Ensure that the buffer size is an integral multiple of the pointer size so
* that each buffer begin meets the chain node alignment.
*/
if ( buffer_size % CPU_SIZEOF_POINTER != 0 ) {
return RTEMS_INVALID_SIZE;
}
if ( buffer_size < sizeof( Chain_Node ) )
return RTEMS_INVALID_SIZE;
/*
* Ensure that the buffer area starting address is aligned on a pointer
* boundary so that each buffer begin meets the chain node alignment.
*/
if ( (uintptr_t) starting_address % CPU_SIZEOF_POINTER != 0 ) {
return RTEMS_INVALID_ADDRESS;
}
#if defined(RTEMS_MULTIPROCESSING)
if ( !_System_state_Is_multiprocessing ) {
attribute_set = _Attributes_Clear( attribute_set, RTEMS_GLOBAL );
}
#endif
the_partition = _Partition_Allocate();
if ( !the_partition ) {
_Objects_Allocator_unlock();
return RTEMS_TOO_MANY;
}
#if defined(RTEMS_MULTIPROCESSING)
if ( _Attributes_Is_global( attribute_set ) &&
!( _Objects_MP_Allocate_and_open( &_Partition_Information, name,
the_partition->Object.id, false ) ) ) {
_Objects_Free( &_Partition_Information, &the_partition->Object );
_Objects_Allocator_unlock();
return RTEMS_TOO_MANY;
}
#endif
_Partition_Initialize(
the_partition,
starting_address,
length,
buffer_size,
attribute_set
);
*id = _Objects_Open_u32(
&_Partition_Information,
&the_partition->Object,
name
);
#if defined(RTEMS_MULTIPROCESSING)
if ( _Attributes_Is_global( attribute_set ) )
_Partition_MP_Send_process_packet(
PARTITION_MP_ANNOUNCE_CREATE,
the_partition->Object.id,
name,
0 /* Not used */
);
#endif
_Objects_Allocator_unlock();
return RTEMS_SUCCESSFUL;
}
static void _Partition_Manager_initialization( void )
{
_Objects_Initialize_information( &_Partition_Information );
}
RTEMS_SYSINIT_ITEM(
_Partition_Manager_initialization,
RTEMS_SYSINIT_CLASSIC_PARTITION,
RTEMS_SYSINIT_ORDER_MIDDLE
);