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. 01, 2007
Filed:
Jun. 08, 2004
Peter Guy Middleton, Mougins, FR;
David John Gwilt, Cambridge, GB;
Ian Victor Devereux, Cambridge, GB;
Bruce James Mathewson, Cambridge, GB;
Antony John Harris, Sheffield, GB;
Richard Roy Grisenthwaite, Nr Royston, GB;
Peter Guy Middleton, Mougins, FR;
David John Gwilt, Cambridge, GB;
Ian Victor Devereux, Cambridge, GB;
Bruce James Mathewson, Cambridge, GB;
Antony John Harris, Sheffield, GB;
Richard Roy Grisenthwaite, Nr Royston, GB;
Arm Limited, Cambridge, GB;
Abstract
A data processing system is provided with a bus having separate write channels W and read channels R via which bus transactions are made. Bus transaction buffersare provided within the bus structure to buffer write requests, particularly so as to alleviate problems associated with relatively slow bus slaves. The bus transaction buffersare responsive to the memory addresses associated with write requests and read requests which pass through them to identify those to the same memory address, or memory addresses within a predetermined range, so as to either ensure a strict correct ordering of those transactions, read to follow write, or to satisfy a read following a write with a buffered write data value and then flushing the read request such that it does not reach its final destination.