Method for Improving Data Security in Register Files Based on Multiple Pipeline Restart

Qingyu Chen, Longsheng Wu, Li Li, Xuhan Ma and Xu An Wang
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Qingyu Chen: Xi'an Microelectronics Technology Institute, Xi'an, Shaanxi, China
Longsheng Wu: Xi'an Microelectronics Technology Institute, Xi'an, Shaanxi, China
Li Li: Xi'an Microelectronics Technology Institute, Xi'an, Shaanxi, China
Xuhan Ma: Xi'an Microelectronics Technology Institute, Xi'an, Shaanxi, China
Xu An Wang: Engineering University of CAPF, Xi'an, Shaanxi, China

International Journal of Information Technology and Web Engineering (IJITWE), 2015, vol. 10, issue 3, 17-32

Abstract: Data security in the register file significantly decreases as a result of technology scaling. Based on pipeline restart, the method of improving the data security and reliability in register files is presented in this paper. As the data and its replica simultaneously exist as a redundant copy of each other in half-custom register files, when an uncorrectable error is detected in the data during the access of the register file, its replica will be checked for subsequent processor operation by the restart of pipeline. In addition, the correctable error in data or its replica can also be scrubbed by rollback and restart of pipeline. Finally, the proposed method is evaluated and the results show that the hardware overhead increases by only 2%, whereas the reliability of data in register file increases by more than 2.5 times. This method can significantly improve the data security in the register file without distinct overhead increasing.

Date: 2015
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