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2011 14th IEEE International Symposium on Object/Component/Service-Oriented Real-Time Distributed Computing Workshops (2011)
Newport Beach, California USA
Mar. 28, 2011 to Mar. 31, 2011
ISBN: 978-0-7695-4377-2
pp: 41-48
ABSTRACT
This paper provides an overview of some principles and mechanisms to securely operate mixed-criticality real-time systems on embedded platforms. Those principles are illustrated with PharOS a complete set of tools to design, implement and execute real-time systems on automotive embedded platforms. The keystone of this approach is a dynamic time-triggered methodology that supports full temporal isolation without wasting CPU time. In addition, memory isolation is handled through automatic off-line generation of fine-grained memory protection tables used at runtime. These isolation mechanisms are building blocks for the support of mixed-criticality applications. Several extensions have been brought to this model to expand the support for mixed-criticality within the system. These extensions feature fault recovery, support for the cohabitation of event-triggered with time-triggered tasks and paravirtualization of other operating systems. The contribution of this paper is to provide a high-level description of these extensions, along with an analysis of their impact on the global system safety, in particular on the determinism property of the PharOS model.
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CITATION

M. Jan, D. Chabrol, E. Ohayon, M. Jacques and M. Lemerre, "Method and Tools for Mixed-Criticality Real-Time Applications within PharOS," 2011 14th IEEE International Symposium on Object/Component/Service-Oriented Real-Time Distributed Computing Workshops(ISORCW), Newport Beach, California USA, 2011, pp. 41-48.
doi:10.1109/ISORCW.2011.15
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