Linux PLIC driver
code:iqr-sifive-plic.c
/*
* This driver implements a version of the RISC-V PLIC with the actual layout
* specified in chapter 8 of the SiFive U5 Coreplex Series Manual:
*
*
* The largest number supported by devices marked as 'sifive,plic-1.0.0', is
* 1024, of which device 0 is defined as non-existent by the RISC-V Privileged
* Spec.
*/