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:
Jan. 25, 2011
Filed:
Nov. 24, 2008
Babysaroja Annem, Allentown, PA (US);
Heng Liao, Belcarra, CA;
Zhongzhi Liu, Chengdu, CN;
Praveen Alexander, Royersford, PA (US);
Babysaroja Annem, Allentown, PA (US);
Heng Liao, Belcarra, CA;
Zhongzhi Liu, Chengdu, CN;
Praveen Alexander, Royersford, PA (US);
PMC-Sierra US, Inc., Santa Clara, CA (US);
Abstract
A DMA engine is provided that is suitable for higher performance System On a Chip (SOC) devices that have multiple concurrent on-chip/off-chip memory spaces. The DMA engine operates either on logical addressing method or physical addressing method and provides random and sequential mapping function from logical address to physical address while supporting frequent context switching among a large number of logical address spaces. Embodiments of the present invention utilize per direction (source-destination) queuing and an internal switch to support non-blocking concurrent transfer of data on multiple directions. A caching technique can be incorporated to reduce the overhead of address translation.