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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [partcreate.c] - Rev 751
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/* * Partition 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: partcreate.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/address.h> #include <rtems/score/object.h> #include <rtems/rtems/part.h> #include <rtems/score/thread.h> #include <rtems/score/sysstate.h> /*PAGE * * rtems_partition_create * * This directive creates a partiton of fixed sized buffers from the * given contiguous memory area. * * Input parameters: * name - user defined partition name * starting_address - physical start address of partition * length - physical length in bytes * buffer_size - size of buffers in bytes * attribute_set - partition attributes * id - pointer to partition id * * Output parameters: * id - partition id * RTEMS_SUCCESSFUL - if successful * error code - if unsuccessful */ rtems_status_code rtems_partition_create( rtems_name name, void *starting_address, unsigned32 length, unsigned32 buffer_size, rtems_attribute attribute_set, Objects_Id *id ) { register Partition_Control *the_partition; if ( !rtems_is_name_valid( name ) ) return RTEMS_INVALID_NAME; if ( length == 0 || buffer_size == 0 || length < buffer_size || !_Partition_Is_buffer_size_aligned( buffer_size ) ) return RTEMS_INVALID_SIZE; if ( !_Addresses_Is_aligned( starting_address ) ) return RTEMS_INVALID_ADDRESS; #if defined(RTEMS_MULTIPROCESSING) if ( _Attributes_Is_global( attribute_set ) && !_System_state_Is_multiprocessing ) return RTEMS_MP_NOT_CONFIGURED; #endif _Thread_Disable_dispatch(); /* prevents deletion */ the_partition = _Partition_Allocate(); if ( !the_partition ) { _Thread_Enable_dispatch(); return RTEMS_TOO_MANY; } #if defined(RTEMS_MULTIPROCESSING) if ( _Attributes_Is_global( attribute_set ) && !( _Objects_MP_Allocate_and_open( &_Partition_Information, name, the_partition->Object.id, FALSE ) ) ) { _Partition_Free( the_partition ); _Thread_Enable_dispatch(); return RTEMS_TOO_MANY; } #endif 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 ); _Objects_Open( &_Partition_Information, &the_partition->Object, &name ); *id = the_partition->Object.id; #if defined(RTEMS_MULTIPROCESSING) if ( _Attributes_Is_global( attribute_set ) ) _Partition_MP_Send_process_packet( PARTITION_MP_ANNOUNCE_CREATE, the_partition->Object.id, name, 0 /* Not used */ ); #endif _Thread_Enable_dispatch(); return RTEMS_SUCCESSFUL; }
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