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:
Feb. 14, 2012
Filed:
Jan. 20, 2009
Sajish Sajayan, C.V. Raman Nagar, IN;
Alok Anand, Bangalore, IN;
Sudhakar Surendran, Bangalore, IN;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A prefetch scheme in a shared memory multiprocessor disables the prefetch when an address falls within a powered down memory bank. A register stores a bit corresponding to each independently powered memory bank to determine whether that memory bank is prefetchable. When a memory bank is powered down, all bits corresponding to the pages in this row are masked so that they appear as non-prefetchable pages to the prefetch access generation engine preventing an access to any page in this memory bank. A powered down status bit corresponding to the memory bank is used for masking the output of the prefetch enable register. The prefetch enable register is unmodified. This also seamlessly restores the prefetch property of the memory banks when the corresponding memory row is powered up.