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Diffstat (limited to 'cpukit/rtems/src/region.c')
| -rw-r--r-- | cpukit/rtems/src/region.c | 486 |
1 files changed, 0 insertions, 486 deletions
diff --git a/cpukit/rtems/src/region.c b/cpukit/rtems/src/region.c deleted file mode 100644 index 5a8ad26797..0000000000 --- a/cpukit/rtems/src/region.c +++ /dev/null @@ -1,486 +0,0 @@ -/* - * Region Manager - * - * - * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. - * On-Line Applications Research Corporation (OAR). - * All rights assigned to U.S. Government, 1994. - * - * This material may be reproduced by or for the U.S. Government pursuant - * to the copyright license under the clause at DFARS 252.227-7013. This - * notice must appear in all copies of this file and its derivatives. - * - * $Id$ - */ - -#include <rtems/system.h> -#include <rtems/rtems/status.h> -#include <rtems/rtems/support.h> -#include <rtems/score/object.h> -#include <rtems/rtems/options.h> -#include <rtems/rtems/region.h> -#include <rtems/score/states.h> -#include <rtems/score/thread.h> - -/*PAGE - * - * _Region_Manager_initialization - * - * This routine initializes all region manager related data structures. - * - * Input parameters: - * maximum_regions - number of regions to initialize - * - * Output parameters: NONE - */ - -void _Region_Manager_initialization( - unsigned32 maximum_regions -) -{ - _Objects_Initialize_information( - &_Region_Information, - OBJECTS_RTEMS_REGIONS, - FALSE, - maximum_regions, - sizeof( Region_Control ), - FALSE, - RTEMS_MAXIMUM_NAME_LENGTH, - FALSE - ); - - /* - * Register the MP Process Packet routine. - */ - - _MPCI_Register_packet_processor( - MP_PACKET_REGION, - 0 /* XXX _Region_MP_Process_packet */ - ); - -} - -/*PAGE - * - * rtems_region_create - * - * This directive creates a region of physical contiguous memory area - * from which variable sized segments can be allocated. - * - * Input parameters: - * name - user defined region name - * starting_address - physical start address of region - * length - physical length in bytes - * page_size - page size in bytes - * attribute_set - region attributes - * id - address of region id to set - * - * Output parameters: - * id - region id - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_region_create( - rtems_name name, - void *starting_address, - unsigned32 length, - unsigned32 page_size, - rtems_attribute attribute_set, - Objects_Id *id -) -{ - Region_Control *the_region; - - if ( !rtems_is_name_valid( name ) ) - return RTEMS_INVALID_NAME; - - if ( !_Addresses_Is_aligned( starting_address ) ) - return RTEMS_INVALID_ADDRESS; - - _Thread_Disable_dispatch(); /* to prevent deletion */ - - the_region = _Region_Allocate(); - - if ( !the_region ) { - _Thread_Enable_dispatch(); - return RTEMS_TOO_MANY; - } - - the_region->maximum_segment_size = - _Heap_Initialize(&the_region->Memory, starting_address, length, page_size); - - if ( !the_region->maximum_segment_size ) { - _Region_Free( the_region ); - _Thread_Enable_dispatch(); - return RTEMS_INVALID_SIZE; - } - - the_region->starting_address = starting_address; - the_region->length = length; - the_region->page_size = page_size; - the_region->attribute_set = attribute_set; - the_region->number_of_used_blocks = 0; - - _Thread_queue_Initialize( - &the_region->Wait_queue, - OBJECTS_RTEMS_REGIONS, - _Attributes_Is_priority( attribute_set ) ? - THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO, - STATES_WAITING_FOR_SEGMENT, - _Region_MP_Send_extract_proxy, - RTEMS_TIMEOUT - ); - - _Objects_Open( &_Region_Information, &the_region->Object, &name ); - - *id = the_region->Object.id; - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; -} - -/*PAGE - * - * rtems_region_ident - * - * This directive returns the system ID associated with - * the region name. - * - * Input parameters: - * name - user defined region name - * id - pointer to region id - * - * Output parameters: - * *id - region id - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_region_ident( - rtems_name name, - Objects_Id *id -) -{ - Objects_Name_to_id_errors status; - - status = _Objects_Name_to_id( - &_Region_Information, - &name, - OBJECTS_SEARCH_LOCAL_NODE, - id - ); - - return _Status_Object_name_errors_to_status[ status ]; -} - -/*PAGE - * - * rtems_region_delete - * - * This directive allows a thread to delete a region specified by - * the region identifier, provided that none of its segments are - * still allocated. - * - * Input parameters: - * id - region id - * - * Output parameters: - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_region_delete( - Objects_Id id -) -{ - register Region_Control *the_region; - Objects_Locations location; - - the_region = _Region_Get( id, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return RTEMS_INVALID_ID; - case OBJECTS_REMOTE: /* this error cannot be returned */ - return RTEMS_INTERNAL_ERROR; - case OBJECTS_LOCAL: - _Region_Debug_Walk( the_region, 5 ); - if ( the_region->number_of_used_blocks == 0 ) { - _Objects_Close( &_Region_Information, &the_region->Object ); - _Region_Free( the_region ); - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; - } - _Thread_Enable_dispatch(); - return RTEMS_RESOURCE_IN_USE; - } - - return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ -} - -/*PAGE - * - * rtems_region_extend - * - * This directive attempts to grow a region of physical contiguous memory area - * from which variable sized segments can be allocated. - * - * Input parameters: - * id - id of region to grow - * start - starting address of memory area for extension - * length - physical length in bytes to grow the region - * - * Output parameters: - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_region_extend( - Objects_Id id, - void *starting_address, - unsigned32 length -) -{ - Region_Control *the_region; - Objects_Locations location; - unsigned32 amount_extended; - Heap_Extend_status heap_status; - rtems_status_code status; - - status = RTEMS_SUCCESSFUL; - - the_region = _Region_Get( id, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return RTEMS_INVALID_ID; - case OBJECTS_REMOTE: /* this error cannot be returned */ - return RTEMS_INTERNAL_ERROR; - case OBJECTS_LOCAL: - - heap_status = _Heap_Extend( - &the_region->Memory, - starting_address, - length, - &amount_extended - ); - - switch ( heap_status ) { - case HEAP_EXTEND_SUCCESSFUL: - the_region->length += amount_extended; - the_region->maximum_segment_size += amount_extended; - break; - case HEAP_EXTEND_ERROR: - status = RTEMS_INVALID_ADDRESS; - break; - case HEAP_EXTEND_NOT_IMPLEMENTED: - status = RTEMS_NOT_IMPLEMENTED; - break; - } - _Thread_Enable_dispatch(); - return( status ); - } - - return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ -} - -/*PAGE - * - * rtems_region_get_segment - * - * This directive will obtain a segment from the given region. - * - * Input parameters: - * id - region id - * size - segment size in bytes - * option_set - wait option - * timeout - number of ticks to wait (0 means wait forever) - * segment - pointer to segment address - * - * Output parameters: - * segment - pointer to segment address filled in - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_region_get_segment( - Objects_Id id, - unsigned32 size, - rtems_option option_set, - rtems_interval timeout, - void **segment -) -{ - register Region_Control *the_region; - Objects_Locations location; - Thread_Control *executing; - void *the_segment; - - *segment = NULL; - - if ( size == 0 ) - return RTEMS_INVALID_SIZE; - - executing = _Thread_Executing; - the_region = _Region_Get( id, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return RTEMS_INVALID_ID; - case OBJECTS_REMOTE: /* this error cannot be returned */ - return RTEMS_INTERNAL_ERROR; - case OBJECTS_LOCAL: - if ( size > the_region->maximum_segment_size ) { - _Thread_Enable_dispatch(); - return RTEMS_INVALID_SIZE; - } - - _Region_Debug_Walk( the_region, 1 ); - - the_segment = _Region_Allocate_segment( the_region, size ); - - _Region_Debug_Walk( the_region, 2 ); - - if ( the_segment ) { - the_region->number_of_used_blocks += 1; - _Thread_Enable_dispatch(); - *segment = the_segment; - return RTEMS_SUCCESSFUL; - } - - if ( _Options_Is_no_wait( option_set ) ) { - _Thread_Enable_dispatch(); - return RTEMS_UNSATISFIED; - } - - executing->Wait.queue = &the_region->Wait_queue; - executing->Wait.id = id; - executing->Wait.count = size; - executing->Wait.return_argument = (unsigned32 *) segment; - - _Thread_queue_Enter_critical_section( &the_region->Wait_queue ); - - _Thread_queue_Enqueue( &the_region->Wait_queue, timeout ); - - _Thread_Enable_dispatch(); - return( executing->Wait.return_code ); - } - - return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ -} -/*PAGE - * - * rtems_region_get_segment_size - * - * This directive will return the size of the segment indicated - * - * Input parameters: - * id - region id - * segment - segment address - * size - pointer to segment size in bytes - * - * Output parameters: - * size - segment size in bytes filled in - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_region_get_segment_size( - Objects_Id id, - void *segment, - unsigned32 *size -) -{ - register Region_Control *the_region; - Objects_Locations location; - Thread_Control *executing; - - executing = _Thread_Executing; - the_region = _Region_Get( id, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return RTEMS_INVALID_ID; - case OBJECTS_REMOTE: /* this error cannot be returned */ - return RTEMS_INTERNAL_ERROR; - case OBJECTS_LOCAL: - - if ( _Heap_Size_of_user_area( &the_region->Memory, segment, size ) ) { - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; - } - _Thread_Enable_dispatch(); - return RTEMS_INVALID_ADDRESS; - } - - return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ -} - -/*PAGE - * - * rtems_region_return_segment - * - * This directive will return a segment to its region. - * - * Input parameters: - * id - region id - * segment - pointer to segment address - * - * Output parameters: - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_region_return_segment( - Objects_Id id, - void *segment -) -{ - register Region_Control *the_region; - Thread_Control *the_thread; - Objects_Locations location; - void **the_segment; - int status; - - the_region = _Region_Get( id, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return RTEMS_INVALID_ID; - case OBJECTS_REMOTE: /* this error cannot be returned */ - return RTEMS_INTERNAL_ERROR; - case OBJECTS_LOCAL: - - _Region_Debug_Walk( the_region, 3 ); - - status = _Region_Free_segment( the_region, segment ); - - _Region_Debug_Walk( the_region, 4 ); - - if ( !status ) { - _Thread_Enable_dispatch(); - return RTEMS_INVALID_ADDRESS; - } - - the_region->number_of_used_blocks -= 1; - for ( ; ; ) { - the_thread = _Thread_queue_First( &the_region->Wait_queue ); - - if ( the_thread == NULL ) - break; - - the_segment = _Region_Allocate_segment( - the_region, - the_thread->Wait.count - ); - - if ( the_segment == NULL ) - break; - - *(void **)the_thread->Wait.return_argument = the_segment; - the_region->number_of_used_blocks += 1; - _Thread_queue_Extract( &the_region->Wait_queue, the_thread ); - the_thread->Wait.return_code = RTEMS_SUCCESSFUL; - } - - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; - } - - return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ -} |