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Diffstat (limited to 'cpukit/rtems/include/rtems/rtems/part.h')
| -rw-r--r-- | cpukit/rtems/include/rtems/rtems/part.h | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/cpukit/rtems/include/rtems/rtems/part.h b/cpukit/rtems/include/rtems/rtems/part.h new file mode 100644 index 0000000000..3d3d2938ab --- /dev/null +++ b/cpukit/rtems/include/rtems/rtems/part.h @@ -0,0 +1,180 @@ +/** + * @file rtems/rtems/part.h + * + * This include file contains all the constants and structures associated + * with the Partition Manager. This manager provides facilities to + * dynamically allocate memory in fixed-sized units which are returned + * as buffers. + * + * Directives provided are: + * + * - create a partition + * - get an ID of a partition + * - delete a partition + * - get a buffer from a partition + * - return a buffer to a partition + */ + +/* 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. + * + * $Id$ + */ + +#ifndef _RTEMS_RTEMS_PART_H +#define _RTEMS_RTEMS_PART_H + +/** + * 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. + */ +#ifndef RTEMS_PART_EXTERN +#define RTEMS_PART_EXTERN extern +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +#include <rtems/score/address.h> +#include <rtems/score/object.h> +#include <rtems/rtems/attr.h> +#include <rtems/rtems/status.h> +#include <rtems/rtems/support.h> +#include <rtems/rtems/types.h> + +/** + * @defgroup ClassicPart Partitions + * + * @ingroup ClassicRTEMS + * + * This encapsulates functionality related to the + * Classic API Partition Manager. + */ +/**@{*/ + +/** + * The following defines the control block used to manage each partition. + */ +typedef struct { + /** This field is the object management portion of a Partition instance. */ + Objects_Control Object; + /** This field is the physical starting address of the Partition. */ + void *starting_address; + /** This field is the size of the Partition in bytes. */ + intptr_t length; + /** This field is the size of each buffer in bytes */ + uint32_t buffer_size; + /** This field is the attribute set provided at create time. */ + rtems_attribute attribute_set; + /** This field is the of allocated buffers. */ + uint32_t number_of_used_blocks; + /** This field is the chain used to manage unallocated buffers. */ + Chain_Control Memory; +} Partition_Control; + +/** + * 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 rtems_partition_create + * + * This routine implements the rtems_partition_create directive. The + * partition will have the name name. The memory area managed by + * the partition is of length bytes and starts at starting_address. + * The memory area will be divided into as many buffers of + * buffer_size bytes as possible. The attribute_set determines if + * the partition is global or local. It returns the id of the + * created partition in ID. + */ +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 +); + +/** + * @brief rtems_partition_ident + * + * This routine implements the rtems_partition_ident directive. + * This directive returns the partition ID associated with name. + * If more than one partition is named name, then the partition + * to which the ID belongs is arbitrary. node indicates the + * extent of the search for the ID of the partition named name. + * The search can be limited to a particular node or allowed to + * encompass all nodes. + */ +rtems_status_code rtems_partition_ident( + rtems_name name, + uint32_t node, + rtems_id *id +); + +/** + * @brief rtems_partition_delete + * + * This routine implements the rtems_partition_delete directive. The + * partition indicated by ID is deleted. + */ +rtems_status_code rtems_partition_delete( + rtems_id id +); + +/** + * @brief rtems_partition_get_buffer + * + * This routine implements the rtems_partition_get_buffer directive. It + * attempts to allocate a buffer from the partition associated with ID. + * If a buffer is allocated, its address is returned in buffer. + */ +rtems_status_code rtems_partition_get_buffer( + rtems_id id, + void **buffer +); + +/** + * @brief rtems_partition_return_buffer + * + * This routine implements the rtems_partition_return_buffer directive. It + * frees the buffer to the partition associated with ID. The buffer must + * have been previously allocated from the same partition. + */ +rtems_status_code rtems_partition_return_buffer( + rtems_id id, + void *buffer +); + +#ifndef __RTEMS_APPLICATION__ +#include <rtems/rtems/part.inl> +#endif +#if defined(RTEMS_MULTIPROCESSING) +#include <rtems/rtems/partmp.h> +#endif + +#ifdef __cplusplus +} +#endif + +/**@}*/ + +#endif +/* end of include file */ |