The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2009
Filed:
Jul. 26, 2006
Adolf Martens, Weil im Schoenbuch, DE;
Walter Niklaus, Stuttgart, DE;
Dietmar Schmunkamp, Schoenaich, DE;
Scott Barnett Swaney, Catskill, NY (US);
Ching-lung L. Tong, Highland Mills, NY (US);
Tobias Webel, Schwaebisch-Gmuend, DE;
Adolf Martens, Weil im Schoenbuch, DE;
Walter Niklaus, Stuttgart, DE;
Dietmar Schmunkamp, Schoenaich, DE;
Scott Barnett Swaney, Catskill, NY (US);
Ching-Lung L. Tong, Highland Mills, NY (US);
Tobias Webel, Schwaebisch-Gmuend, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A computer implemented method and data processing system are provided for preventing firmware defects from disrupting logic clocks. In response to a firmware interface requesting a scan operation for a functional unit, protection logic allows a scan enable to activate to the functional unit only if the logic clocks are stopped to that functional unit, otherwise the scan enable is not activated, an error is indicated, and an interrupt is presented to firmware. Also, in response to a command from a firmware interface to stop the logic clocks to a functional unit, protection logic allows the clocks to be stopped to the functional unit only if the functional unit is already indicating a catastrophic error, otherwise the clocks are not stopped, an error is indicated, and an interrupt is presented to firmware.