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. 02, 2006
Filed:
Dec. 18, 2003
Dattatri N. Mattur, Sunnyvale, CA (US);
Sampath Hosahally Kumar, San Jose, CA (US);
Udayakumar Srinivasan, Milpitas, CA (US);
Madhu Rao, San Jose, CA (US);
Abhay Ujwal Bhorkar, San Jose, CA (US);
Dattatri N. Mattur, Sunnyvale, CA (US);
Sampath Hosahally Kumar, San Jose, CA (US);
Udayakumar Srinivasan, Milpitas, CA (US);
Madhu Rao, San Jose, CA (US);
Abhay Ujwal Bhorkar, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A bridging device has a first port to allow the device to communicate with other devices on an expansion bus and a second port to allow the device to communicate with devices on a second bus. The device also includes a memory to store data and a processor or logic to prefetch data upon request from a device on the expansion bus, tag any remaining prefetched data with an identifier upon a disconnecting event, and retain the prefetched data until a discarding event occurs. A method of controlling prefetch transactions on an expansion bus involves prefetching data across a primary bus for a device on a secondary bus. An indication that a disconnecting event has occurred is detected and any remaining prefetched data remaining is tagged with an identifier and retained. The data may be prefetched from a controlled prefetch region in the memory.