July 2004
Intermediate to advanced
1744 pages
35h 3m
English
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An Introduction to the Interrupt Sources
The processor can receive interrupts from sources that are local to the processor as well as from remote sources. The following two sections provide a list and a basic description of the local and remote interrupt sources.
Local Interrupt Sources
Refer to “Local Interrupts” on page 1503.
Remote Interrupt Sources
The processor's Local APIC can also receive interrupts in the form of interrupt messages from the outside world. These remote sources would include:
IPIs (Inter Processor Interrupt) messages received from the Local APICs in other processors (or that the Local APIC might send to itself).
Interrupt messages received from the IO APIC as a result of an IRQ (Interrupt Request) signal line asserted to ...
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