Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus interface architecture
Reexamination Certificate
2006-05-02
2006-05-02
Perveen, Rehana (Department: 2112)
Electrical computers and digital data processing systems: input/
Intrasystem connection
Bus interface architecture
C710S300000, C711S137000
Reexamination Certificate
active
07039747
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.
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Bhorkar Abhay Ujwal
Kumar Sampath Hosahally
Mattur Dattatri N.
Rao Madhu
Srinivasan Udayakumar
Cisco Technology Inc.
Lee Christopher E.
Marger & Johnson & McCollom, P.C.
Perveen Rehana
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