Protecting combinational logic in pipelined microprocessor cores against transient and permanent faults

Imran Wali 1 Arnaud Virazel 1 Alberto Bosio 1 Luigi Dilillo 1 Patrick Girard 1 Aida Todri-Sanial 2
1 TEST - TEST
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
2 SmartIES - Smart Integrated Electronic Systems
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : CMOS technology trends at one side open up some opportunities like making small and power efficient devices available, which in turn allow to put more functionality into a single chip. However, on the other side it poses some challenges like making devices vulnerable to hard and soft errors. In this paper we propose an efficient fault-tolerant architecture able to deal with permanent and transient faults in combinational parts of pipeline structures. The principle consists in triplicating the combinational logic parts but, unlike TMR, only two copies are running in parallel while the third one remains in standby until an error is detected. We implement this approach on a MIPS microprocessor as case study to make it resilient against transient and permanent faults.
Keywords : Microprocessor Hard errors fault-tolerant architecture Combinational logic protection MIPS microprocessor Computer architecture Circuit faults power efficient devices Soft errors Transient faults pipelined microprocessor cores transient and permanent faults redundancy combinational logic Transient analysis Pipelines Microprocessors Fault tolerant systems Fault tolerance CMOS technology Microprocessor chips Combinational circuits CMOS logic circuits Permanent faults Pipeline structures
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Conference papers
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https://hal-lirmm.ccsd.cnrs.fr/lirmm-01248598
Contributor : Aida Todri-Sanial <>
Submitted on : Sunday, December 27, 2015 - 9:41:34 PM
Last modification on : Wednesday, December 11, 2019 - 1:32:02 AM

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CNRS | LIRMM | LIRMM_MIC | MIC | MIPS | UNIV-MONTPELLIER | SMARTIES | TEST

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Imran Wali, Arnaud Virazel, Alberto Bosio, Luigi Dilillo, Patrick Girard, et al.. Protecting combinational logic in pipelined microprocessor cores against transient and permanent faults. DDECS: Design and Diagnostics of Electronic Circuits and Systems, Apr 2014, Warsaw, Poland. pp.223-225, ⟨10.1109/DDECS.2014.6868794⟩. ⟨lirmm-01248598⟩

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