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Real-time fault injection using enhanced on-chip debug infrastructures
Fidalgo, André V.; Gericota, Manuel G.; Alves, Gustavo R.; Ferreira, José M.The rapid increase in the use of microprocessor-based systems in critical areas, where failures imply risks to human lives, to the environment or to expensive equipment, significantly increased the need for dependable systems, able to detect, tolerate and eventually correct faults. The verification and validation of such systems is frequently performed via fault injection, using various forms and techniques. Ho...
An integrated reusable remote laboratory to complement electronics teaching
Sousa, Nuno; Alves, Gustavo R.; Gericota, Manuel G.The great majority of the courses on science and technology areas where lab work is a fundamental part of the apprenticeship was not until recently available to be taught at distance. This reality is changing with the dissemination of remote laboratories. Supported by resources based on new information and communication technologies, it is now possible to remotely control a wide variety of real laboratories. Ho...
Using test infrastructures for (remote) online evaluation of the sensitivity to...
Fidalgo, André V.; Alves, Gustavo R.; Felgueiras, Manuel C.; Gericota, Manuel G.This paper proposes an online mechanism that can evaluate the sensitivity of single event upsets (SEUs) of field programmable gate arrays (FPGAs). The online detection mechanism cyclically reads and compares the values form the external and internal configuration memories, taking into account the mask information. This remote detection method also signals any mismatch as a result of a SEU that affects both used...
A comparative analysis of fault injection methods via enhanced on-chip debug in...
Fidalgo, André V.; Alves, Gustavo R.; Gericota, Manuel G.; Ferreira, José M.On-chip debug (OCD) features are frequently available in modern microprocessors. Their contribution to shorten the time-to-market justifies the industry investment in this area, where a number of competing or complementary proposals are available or under development, e.g. NEXUS, CJTAG, IJTAG. The controllability and observability features provided by OCD infrastructures provide a valuable toolbox that can be u...
Reliability and availability in reconfigurable computing: a basis for a common ...
Gericota, Manuel G.; Alves, Gustavo R.; Silva, Miguel L.; Ferreira, José M.Dynamically reconfigurable SRAM-based field-programmable gate arrays (FPGAs) enable the implementation of reconfigurable computing systems where several applications may be run simultaneously, sharing the available resources according to their own immediate functional requirements. To exclude malfunctioning due to faulty elements, the reliability of all FPGA resources must be guaranteed. Since resource allocati...
Using NEXUS compliant debuggers for real time fault injection on microprocessors
Fidalgo, André V.; Gericota, Manuel G.; Alves, Gustavo R.; Ferreira, José M.As electronic devices get smaller and more complex, dependability assurance is becoming fundamental for many mission critical computer based systems. This paper presents a case study on the possibility of using the on-chip debug infrastructures present in most current microprocessors to execute real time fault injection campaigns. The proposed methodology is based on a debugger customized for fault injection an...
A self-healing real-time system based on run-time self-reconfiguration
Gericota, Manuel G.; Alves, Gustavo R.; Ferreira, José M.The new generations of SRAM-based FPGA (field programmable gate array) devices are the preferred choice for the implementation of reconfigurable computing platforms intended to accelerate processing in real-time systems. However, FPGA's vulnerability to hard and soft errors is a major weakness to robust configurable system design. In this paper, a novel built-in self-healing (BISH) methodology, based on run-tim...
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