Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Madhusudhan Talluri0
Frederick J. Smith, IV0
Jeff L. Havens0
Date of Patent
August 25, 2009
0Patent Application Number
111298020
Date Filed
May 16, 2005
0Patent Primary Examiner
Patent abstract
Systems and methods for providing a framework within which device drivers may run at a user-mode level. A platform (e.g., APIC) or bus (PCI bus) generic feature is used to take the CPU out of interrupt mode without having to wait for a user-level driver to clear the device interrupt. This allows writing the complete device driver in user space. The device driver still get notifications on interrupts but not at interrupt priority. The same scheme can be extended to shared interrupts, where multiple devices share a single interrupt line.
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