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:
Aug. 25, 2009
Filed:
May. 16, 2005
Madhusudhan Talluri, Bellevue, WA (US);
Frederick J. Smith, Iv, Redmond, WA (US);
Jeff L. Havens, Issaquah, WA (US);
Madhusudhan Talluri, Bellevue, WA (US);
Frederick J. Smith, IV, Redmond, WA (US);
Jeff L. Havens, Issaquah, WA (US);
Microsoft Corporation, Redmond, WA (US);
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.