# Copyright (c) 2012 Mark D. Hill and David A. Wood
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# Authors: Nilay Vaish

from m5.SimObject import SimObject
from m5.params import *
from m5.proxy import *

from m5.objects.System import System

class Prefetcher(SimObject):
    type = 'Prefetcher'
    cxx_class = 'Prefetcher'
    cxx_header = "mem/ruby/structures/Prefetcher.hh"

    num_streams = Param.UInt32(4,
        "Number of prefetch streams to be allocated")
    pf_per_stream = Param.UInt32(1, "Number of prefetches per stream")
    unit_filter  = Param.UInt32(8,
        "Number of entries in the unit filter array")
    nonunit_filter = Param.UInt32(8,
        "Number of entries in the non-unit filter array")
    train_misses = Param.UInt32(4, "")
    num_startup_pfs = Param.UInt32(1, "")
    cross_page = Param.Bool(False, """True if prefetched address can be on a
            page different from the observed address""")
    sys = Param.System(Parent.any, "System this prefetcher belongs to")