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Arm Generic Interrupt Controller Support
The GIC is an extension to ARMv8 which allows routing and filtering interrupts in a single or multi-core system.
The term “Forwarding” is sometimes used in this crate. This is because the Distributor, Redistributor and CPU interface are chained in the controller. The distributor and the redistributor are configured by the code of this crate to either allow (forward) interrupts or disallow (discard) them.