METHOD FOR DELIVERING INTERRUPTS TO USER MODE DRIVERS

摘要

Systems and methods for providing a framework within which device drivers ma y 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 t he complete device driver in user space. The device driver still get notifications on interrupts but not at interrupt priority. The same scheme c an be extended to shared interrupts, where multiple devices share a single interrupt line.