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:
Oct. 06, 2009
Filed:
Jul. 07, 2004
Mark James Galbraith, Burwell, GB;
Harry Samuel Thomas Fearnhamm, Cambridge, GB;
Nicholas Esca Smith, Bottisham, GB;
Bruce James Mathewson, Papworth Everard, GB;
Mark James Galbraith, Burwell, GB;
Harry Samuel Thomas Fearnhamm, Cambridge, GB;
Nicholas Esca Smith, Bottisham, GB;
Bruce James Mathewson, Papworth Everard, GB;
ARM Limited, Cambridge, GB;
Abstract
A data processing apparatus comprises at least one source processor core, at least two destination processor cores, a message handler and a bus arrangement providing a data communication path between the source core, the destination cores and the message handler. The message handler has plurality of message-handling modules. At least one of the message-handling modules has a message receipt indicator that is modifiable by each of the destination processor cores to indicate that a message has been received at its destination. This message-handling module also has a transmission completion detector operable to detect, in dependence upon a message receipt indicator value that a message has been received by all of the at least two destination processor cores and to initiate transmission of an acknowledgement signal to the source processor core.