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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.org/license/LICENSE.
*/
#ifndef _RTEMS_RTEMS_PARTIMPL_H
#define _RTEMS_RTEMS_PARTIMPL_H
#include <rtems/rtems/partdata.h>
#include <rtems/score/chainimpl.h>
#include <rtems/score/objectimpl.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup ClassicPartImpl Classic Partition Manager Implementation
*
* @ingroup ClassicPart
*
* @{
*/
/**
* @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_unprotected( &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_unprotected( &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
)
{
intptr_t offset;
offset = _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 )
);
}
RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_size_aligned(
uint32_t buffer_size
)
{
return (buffer_size % CPU_SIZEOF_POINTER) == 0;
}
RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_area_aligned(
const void *starting_address
)
{
return (((uintptr_t) starting_address) % CPU_SIZEOF_POINTER) == 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 );
}
RTEMS_INLINE_ROUTINE void _Partition_Initialize(
Partition_Control *the_partition,
void *starting_address,
uint32_t length,
uint32_t buffer_size,
rtems_attribute attribute_set
)
{
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
);
_ISR_lock_Initialize( &the_partition->Lock, "Partition" );
}
RTEMS_INLINE_ROUTINE void _Partition_Destroy(
Partition_Control *the_partition
)
{
_ISR_lock_Destroy( &the_partition->Lock );
}
/**
* @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 );
}
RTEMS_INLINE_ROUTINE Partition_Control *_Partition_Get(
Objects_Id id,
ISR_lock_Context *lock_context
)
{
return (Partition_Control *) _Objects_Get(
id,
lock_context,
&_Partition_Information
);
}
RTEMS_INLINE_ROUTINE void _Partition_Acquire_critical(
Partition_Control *the_partition,
ISR_lock_Context *lock_context
)
{
_ISR_lock_Acquire( &the_partition->Lock, lock_context );
}
RTEMS_INLINE_ROUTINE void _Partition_Release(
Partition_Control *the_partition,
ISR_lock_Context *lock_context
)
{
_ISR_lock_Release_and_ISR_enable( &the_partition->Lock, lock_context );
}
/**@}*/
#ifdef __cplusplus
}
#endif
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/rtems/partmp.h>
#endif
#endif
/* end of include file */
|
