Redirection table

Redirection table

The redirection table in an I/O Advanced Programmable Interrupt Controller, or IOAPIC, contains information about how to forward interrupts from each interrupt signal line on the APIC. The redirection table is programmable.

Each entry contains the following information for each interrupt signal line:

* Whether the line is masked (enabled)
* Whether the line should be edge or level triggered
* Signal polarity for level interrupts: active when low or active when high
* Which CPU(s) the interrupt should be routed to
* How the target CPU(s) should deliver the interrupt to software, including
* Which legacy interrupt vector the target CPU(s) should route the interrupt to (effectively controls priority)

See also

* Intel APIC Architecture

External links

* [http://www.intel.com/design/chipsets/datashts/29056601.pdf Datasheet for Intel 82093AA IOAPIC]


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