Method of processing system management interrupt requests

Details Method of processing system management interrupt requests Method of processing system management interrupt requests

1998-09-17

2000-11-07

Sheikh, Ayaz R.

Electrical computers and digital data processing systems: input/

Interrupt processing

Interrupt prioritizing

710262, 710261, 710265, G06F 1326

Patent

active

061450480

ABSTRACT:
A computer system processes system management interrupt (SMI) requests from plural system management (SM) requesters. Different SM requesters are provided with different priority levels such that high priority system management interrupts can be serviced without waiting for lower priority system management interrupts to be serviced completely. In particular, the method includes executing a first SMI handler routine in response to receiving a first SMI from a first SM requester. In response to receiving a second SMI asserted by a second SM requester, the method determines whether the second SMI request has been assigned a higher priority than the first SMI request. If so, then the method interrupts executing the first SMI handler routine and executes a second SMI handler routine corresponding to the second SMI request. Otherwise, the method completes executing the first SMI handler routine and then executes the second SMI handler routine.

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