Abstract
The Open Group Future Airborne Capability Environment (FACE ™ ) Consortium has developed a reference architecture and standard for real-time embedded avionics systems. The FACE Technical Standard defines required capabilities for real-time operating systems (RTOS), portable components, and a shared data model to facilitate information exchange between components. FACE RTOS requirements are based on ARINC 653 and POSIX 1003.1b with tailoring to address the safety and security needs of avionics systems. Deos is a safety-certified RTOS that supports ARINC 653 but not POSIX. In contrast, RTEMS is an open source RTOS that supports POSIX but not ARINC 653. Integrating a paravirtualized RTEMS with Deos combines the strengths of both and provides a path to conformance with the FACE Safety Base operating system profile. This paper presents the FACE operating system profiles and discusses the technical challenges of the paravirtualization and integration effort.
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