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/**
* @file
*
* @brief RTEMS Partition Create
* @ingroup ClassicPart Partitions
*/
/*
* COPYRIGHT (c) 1989-1999.
* 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/score/object.h>
#include <rtems/rtems/part.h>
#include <rtems/score/thread.h>
#include <rtems/score/sysstate.h>
/*
* rtems_partition_create
*
* This directive creates a partiton of fixed sized buffers from the
* given contiguous memory area.
*
* Input parameters:
* name - user defined partition name
* starting_address - physical start address of partition
* length - physical length in bytes
* buffer_size - size of buffers in bytes
* attribute_set - partition attributes
* id - pointer to partition id
*
* Output parameters:
* id - partition id
* RTEMS_SUCCESSFUL - if successful
* error code - if unsuccessful
*/
rtems_status_code rtems_partition_create(
rtems_name name,
void *starting_address,
uint32_t length,
uint32_t buffer_size,
rtems_attribute attribute_set,
rtems_id *id
)
{
register Partition_Control *the_partition;
if ( !rtems_is_name_valid( name ) )
return RTEMS_INVALID_NAME;
if ( !starting_address )
return RTEMS_INVALID_ADDRESS;
if ( !id )
return RTEMS_INVALID_ADDRESS;
if ( length == 0 || buffer_size == 0 || length < buffer_size ||
!_Partition_Is_buffer_size_aligned( buffer_size ) )
return RTEMS_INVALID_SIZE;
if ( !_Addresses_Is_aligned( starting_address ) )
return RTEMS_INVALID_ADDRESS;
#if defined(RTEMS_MULTIPROCESSING)
if ( _Attributes_Is_global( attribute_set ) &&
!_System_state_Is_multiprocessing )
return RTEMS_MP_NOT_CONFIGURED;
#endif
_Thread_Disable_dispatch(); /* prevents deletion */
the_partition = _Partition_Allocate();
if ( !the_partition ) {
_Thread_Enable_dispatch();
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 ) ) ) {
_Partition_Free( the_partition );
_Thread_Enable_dispatch();
return RTEMS_TOO_MANY;
}
#endif
the_partition->starting_address = starting_address;
the_partition->length = length;
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 );
_Objects_Open(
&_Partition_Information,
&the_partition->Object,
(Objects_Name) name
);
*id = the_partition->Object.id;
#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
_Thread_Enable_dispatch();
return RTEMS_SUCCESSFUL;
}
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