from m5 import build_env
from m5.config import *
from AlphaTLB import AlphaDTB, AlphaITB
from Bus import Bus

class BaseCPU(SimObject):
    type = 'BaseCPU'
    abstract = True
    mem = Param.MemObject("memory")

    system = Param.System(Parent.any, "system object")
    if build_env['FULL_SYSTEM']:
        dtb = Param.AlphaDTB(AlphaDTB(), "Data TLB")
        itb = Param.AlphaITB(AlphaITB(), "Instruction TLB")
        cpu_id = Param.Int(-1, "CPU identifier")
    else:
        workload = VectorParam.Process("processes to run")

    max_insts_all_threads = Param.Counter(0,
        "terminate when all threads have reached this inst count")
    max_insts_any_thread = Param.Counter(0,
        "terminate when any thread reaches this inst count")
    max_loads_all_threads = Param.Counter(0,
        "terminate when all threads have reached this load count")
    max_loads_any_thread = Param.Counter(0,
        "terminate when any thread reaches this load count")

    defer_registration = Param.Bool(False,
        "defer registration with system (for sampling)")

    clock = Param.Clock(Parent.clock, "clock speed")

    _mem_ports = []

    def connectMemPorts(self, bus):
        for p in self._mem_ports:
            exec('self.%s = bus.port' % p)

    def addPrivateSplitL1Caches(self, ic, dc):
        assert(len(self._mem_ports) == 2)
        self.icache = ic
        self.dcache = dc
        self.icache_port = ic.cpu_side
        self.dcache_port = dc.cpu_side
        self._mem_ports = ['icache.mem_side', 'dcache.mem_side']
#        self.mem = dc

    def addTwoLevelCacheHierarchy(self, ic, dc, l2c):
        self.addPrivateSplitL1Caches(ic, dc)
        self.toL2Bus = Bus()
        self.connectMemPorts(self.toL2Bus)
        self.l2cache = l2c
        self.l2cache.cpu_side = self.toL2Bus.port
        self._mem_ports = ['l2cache.mem_side']