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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [regioncreate.c] - Rev 410
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/* * Region Manager * * * 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.OARcorp.com/rtems/license.html. * * $Id: regioncreate.c,v 1.2 2001-09-27 11:59:19 chris Exp $ */ #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 * * 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, #if defined(RTEMS_MULTIPROCESSING) _Region_MP_Send_extract_proxy, #else NULL, #endif RTEMS_TIMEOUT ); _Objects_Open( &_Region_Information, &the_region->Object, &name ); *id = the_region->Object.id; _Thread_Enable_dispatch(); return RTEMS_SUCCESSFUL; }
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