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:
May. 06, 2008
Filed:
Jun. 30, 2004
Gregory F. Grohoski, Austin, TX (US);
Ricky C. Hetherington, Pleasanton, CA (US);
Paul J. Jordan, Austin, TX (US);
Robert M. Maier, San Jose, CA (US);
Gregory F. Grohoski, Austin, TX (US);
Ricky C. Hetherington, Pleasanton, CA (US);
Paul J. Jordan, Austin, TX (US);
Robert M. Maier, San Jose, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
A method and mechanism for error recovery in a processor. A multithreaded processor is configured to utilize software for hardware detected machine errors. Rather than correcting and clearing the detected errors, hardware is configured to report the errors precisely. Both program-related exceptions and hardware errors are detected and, without being corrected by the hardware, flow down the pipeline to a trap unit where they are prioritized and handled via software. The processor assigns each instruction a thread ID and error information as it follows the pipeline. The trap unit records the error by using the thread ID of the instruction and the pipelined error information in order to determine which ESR receives the information and what to store in the ESR. A trap handling routine is then initiated to facilitate error recovery.