Method to emulate message signaled interrupts with interrupt data
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United States of America Patent
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Mar 31, 2015
Grant Date -
Aug 21, 2014
app pub date -
Nov 3, 2011
filing date -
Nov 3, 2011
priority date (Note) -
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Abstract
Methods to emulate a message signaled interrupt (MSI) with interrupt data are described herein. An embodiment of the invention includes a memory decoder to monitor a predetermined memory block allocated to a device, an interrupt controller to receive an emulated messaged signaled interrupt (MSI) signal from the memory decoder in response to a posted write transaction to the predetermined memory block initiated from the device, and an execution unit to execute an interrupt service routine (ISR) associated with the device to service the MSI using interrupt data retrieved from the predetermined memory block, without having to obtain the interrupt data from the device via an input output (IO) transaction.
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