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. 03, 2015
Filed:
Aug. 08, 2011
Phanindra Kumar Mannava, Austin, TX (US);
Jamshed Jalal, Austin, TX (US);
Ramamoorthy Guru Prasadh, Austin, TX (US);
Michael Alan Filippo, Driftwood, TX (US);
Phanindra Kumar Mannava, Austin, TX (US);
Jamshed Jalal, Austin, TX (US);
Ramamoorthy Guru Prasadh, Austin, TX (US);
Michael Alan Filippo, Driftwood, TX (US);
ARM Limited, Cambridge, GB;
Abstract
A data processing system that manages data hazards at a coherency controller and not at an initiator device is disclosed. Write requests are processed in a two part form, such that a first part is transmitted and when the coherency controller has space to accept data, the data and a state of the data prior to a write are sent as a second part of a write request. When there are copending reads and writes to the same address, writes are stalled by not responding to the first part of a write request and snoop requests received to the address are processed regardless of the fact that the write is pending. When the pending read has completed, the coherency controller will respond to the first part of the write request and the initiator device will complete the write by sending the data and a state indicator following the snoop.