ChorusOS 4.0 MPC8260 Target Family Guide

ChorusOS 4.0 Supported Features

The following table shows the ChorusOS kernel and operating system optional features that are available for the MPC8260 processor family. The availability status of a feature, can be one of:


The feature is supported, and is configurable with the configurator(1CC) command, or with the ews GUI configuration tool.

Please refer to the note at the end of the table for information about specific conditions, or restrictions, for a given supported feature.

Some of the features (such as MSDOSFS, FLASH, FS_MAPPER, for example) require specific low-level drivers. These features operate only on platforms which provide these drivers.


The feature is not supported.

 Feature Description Feature Name Availability
 Actor management 
   Dynamic actor loading management ACTOR_EXTENDED_MNGT Y
   User-mode extension support USER_MODE Y
   Dynamic libraries DYNAMIC_LIBY [Limitation: the binaries making up the executing image of an actor (main program and dynamic libraries) must hold in a 32MB address range. Even if their total size is less than 32 MB, this is not garanteed in flat mode or for supervisor actors.]
   Compressed file management GZ_FILE Y
  POSIX round-robin scheduling class ROUND_ROBIN Y
 Memory management 
   Virtual (user and supervisor) address space VIRTUAL_ADDRESS_SPACEY [If the value for VIRTUAL_ADDRESS_SPACE is true, the value for ON_DEMAND_PAGING is true. If the value for VIRTUAL_ADDRESS_SPACE is false, the value for ON_DEMAND_PAGING is false.]
   On-demand paging ON_DEMAND_PAGINGY
 Hot restart and persistent memory 
  Hot restart HOT_RESTART Y
 Inter-thread communication 
   Semaphores SEM Y
   Event flag sets EVENT Y
   Mutual exclusion lock supporting thread priority inversion avoidance RTMUTEX Y
 Time management 
   Periodic timers TIMER Y
   Thread and actor virtual timer VTIMER Y
   Date and time of day DATE Y
   Real-time clock RTC Y
 Inter-process communication 
   Location-transparent inter-process communication IPC Y
  Remote (inter-site) IPC support IPC_REMOTE Y
  Remote IPC communications medium IPC_REMOTE_COMM Y
   Mailbox-based communications mechanism MIPC Y
   POSIX 1003.1-compliant message queues POSIX_MQ Y
   POSIX 1003.1-compliant shared memory objects POSIX_SHM Y
  Local name server for LAP binding LAPBIND Y
  LAP validity-check option LAPSAFE Y
 Tools support 
   Message logging LOG Y
  Profiling and benchmark support PERF Y
  System Monitoring MON Y
  System debuggingDEBUG_SYSTEM [A flashed system image configured with DEBUG_SYSTEM enabled does not boot. The DEBUG_SYSTEM feature must be disabled.]  Y
  Basic command interpreter on target LOCAL_CONSOLE Y
  Remote shell RSH Y
 File system options 
   Named pipes FIFOFS Y
   MS-DOS file system MSDOSFS Y
  UFS file system UFS Y
 I/O management 
   Network packet filter BPF Y
  Swap support FS_MAPPER Y
  Driver for IDE disk IDE_DISK N
  /dev/mem, /dev/kmem, /dev/null, /dev/zero DEV_MEM Y
  Support for RAM disk RAM_DISK Y
  Support for FLASH media FLASH Y
  Virtual TTY VTTY Y
  Driver for SCSI disk SCSI_DISK N
 Support for IPC IOM_IPC Y
 Support for OSI IOM_OSI Y
  Serial link IP SLIP Y
   POSIX 1003.1g-compliant sockets POSIX_SOCKETS Y
   Point-to-point protocols PPP Y
   Local sockets and pipes AF_LOCAL Y
   ChorusOS statistics ADMIN_CHORUSSTAT Y
  ifconfig administration command ADMIN_IFCONFIG Y
  mount administration command ADMIN_MOUNT Y
  rarp administration command ADMIN_RARP Y
  route administration command ADMIN_ROUTE Y
  shutdown administration command ADMIN_SHUTDOWN Y
  netstat administration command ADMIN_NETSTAT Y