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/**
* @file
*
* @ingroup ClassicPartImpl
*
* @brief Classic Partition Manager Implementation
*/
/* COPYRIGHT (c) 1989-2008.
* 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.
*/
#ifndef _RTEMS_RTEMS_PARTIMPL_H
#define _RTEMS_RTEMS_PARTIMPL_H
#include <rtems/rtems/part.h>
#include <rtems/score/chainimpl.h>
#include <rtems/score/objectimpl.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup ClassicPartImpl Classic Partition Manager Implementation
*
* @ingroup ClassicPart
*
* @{
*/
/**
* This constant is defined to extern most of the time when using
* this header file. However by defining it to nothing, the data
* declared in this header file can be instantiated. This is done
* in a single per manager file.
*
* Partition Manager -- Instantiate Data
*/
#ifndef RTEMS_PART_EXTERN
#define RTEMS_PART_EXTERN extern
#endif
/**
* The following defines the information control block used to
* manage this class of objects.
*/
RTEMS_PART_EXTERN Objects_Information _Partition_Information;
/**
* @brief Partition Manager Initialization
*
* This routine performs the initialization necessary for this manager.
*/
void _Partition_Manager_initialization(void);
/**
* @brief Allocate a buffer from the_partition.
*
* This function attempts to allocate a buffer from the_partition.
* If successful, it returns the address of the allocated buffer.
* Otherwise, it returns NULL.
*/
RTEMS_INLINE_ROUTINE void *_Partition_Allocate_buffer (
Partition_Control *the_partition
)
{
return _Chain_Get( &the_partition->Memory );
}
/**
* @brief Frees the_buffer to the_partition.
*
* This routine frees the_buffer to the_partition.
*/
RTEMS_INLINE_ROUTINE void _Partition_Free_buffer (
Partition_Control *the_partition,
Chain_Node *the_buffer
)
{
_Chain_Append( &the_partition->Memory, the_buffer );
}
/**
* @brief Checks whether is on a valid buffer boundary for the_partition.
*
* This function returns TRUE if the_buffer is on a valid buffer
* boundary for the_partition, and FALSE otherwise.
*/
RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_on_boundary (
void *the_buffer,
Partition_Control *the_partition
)
{
uint32_t offset;
offset = (uint32_t) _Addresses_Subtract(
the_buffer,
the_partition->starting_address
);
return ((offset % the_partition->buffer_size) == 0);
}
/**
* @brief Checks whether the_buffer is a valid buffer from the_partition.
*
* This function returns TRUE if the_buffer is a valid buffer from
* the_partition, otherwise FALSE is returned.
*/
RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_valid (
Chain_Node *the_buffer,
Partition_Control *the_partition
)
{
void *starting;
void *ending;
starting = the_partition->starting_address;
ending = _Addresses_Add_offset( starting, the_partition->length );
return (
_Addresses_Is_in_range( the_buffer, starting, ending ) &&
_Partition_Is_buffer_on_boundary( the_buffer, the_partition )
);
}
/**
* @brief Checks if partition is buffer size aligned.
*
* This function returns TRUE if the use of the specified buffer_size
* will result in the allocation of buffers whose first byte is
* properly aligned, and FALSE otherwise.
*/
RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_size_aligned (
uint32_t buffer_size
)
{
return ((buffer_size % CPU_PARTITION_ALIGNMENT) == 0);
}
/**
* @brief Allocates a partition control block from the
* inactive chain of free partition control blocks.
*
* This function allocates a partition control block from
* the inactive chain of free partition control blocks.
*/
RTEMS_INLINE_ROUTINE Partition_Control *_Partition_Allocate ( void )
{
return (Partition_Control *) _Objects_Allocate( &_Partition_Information );
}
/**
* @brief Frees a partition control block to the
* inactive chain of free partition control blocks.
*
* This routine frees a partition control block to the
* inactive chain of free partition control blocks.
*/
RTEMS_INLINE_ROUTINE void _Partition_Free (
Partition_Control *the_partition
)
{
_Objects_Free( &_Partition_Information, &the_partition->Object );
}
/**
* @brief Maps partition IDs to partition control blocks.
*
* This function maps partition IDs to partition control blocks.
* If ID corresponds to a local partition, then it returns
* the_partition control pointer which maps to ID and location
* is set to OBJECTS_LOCAL. If the partition ID is global and
* resides on a remote node, then location is set to OBJECTS_REMOTE,
* and the_partition is undefined. Otherwise, location is set
* to OBJECTS_ERROR and the_partition is undefined.
*/
RTEMS_INLINE_ROUTINE Partition_Control *_Partition_Get (
Objects_Id id,
Objects_Locations *location
)
{
return (Partition_Control *)
_Objects_Get( &_Partition_Information, id, location );
}
/**
* @brief Checks if the_partition is NULL.
*
* This function returns TRUE if the_partition is NULL
* and FALSE otherwise.
*/
RTEMS_INLINE_ROUTINE bool _Partition_Is_null (
Partition_Control *the_partition
)
{
return ( the_partition == NULL );
}
/**@}*/
#ifdef __cplusplus
}
#endif
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/rtems/partmp.h>
#endif
#endif
/* end of include file */
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