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from m5.objects.Device import BasicPioDevice
from m5.params import *
from m5.proxy import *

class Plic(BasicPioDevice):
    """
    This implementation of PLIC is based on
    the SiFive U54MC datasheet:
    https://sifive.cdn.prismic.io/sifive/fab000f6-
    0e07-48d0-9602-e437d5367806_sifive_U54MC_rtl_
    full_20G1.03.00_manual.pdf
    """
    type = 'Plic'
    cxx_header = 'dev/riscv/plic.hh'
    intrctrl = Param.IntrControl(Parent.any, "interrupt controller")
    pio_size = Param.Addr(0x4000000, "PIO Size")
    n_src = Param.Int("Number of interrupt sources")