# Copyright (c) 2005-2007 The Regents of The University of Michigan
# Copyright (c) 2011 Regents of the University of California
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# Authors: Nathan Binkert
#          Rick Strong

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

from SimpleMemory import *

class MemoryMode(Enum): vals = ['invalid', 'atomic', 'timing',
                                'atomic_noncaching']

class System(MemObject):
    type = 'System'
    cxx_header = "sim/system.hh"
    system_port = MasterPort("System port")

    # Override the clock from the ClockedObject which looks at the
    # parent clock by default. The 1 GHz default system clock serves
    # as a start for the modules that rely on the parent to provide
    # the clock.
    clock = '1GHz'

    @classmethod
    def export_method_cxx_predecls(cls, code):
        code('#include "sim/system.hh"')

    @classmethod
    def export_methods(cls, code):
        code('''
      Enums::MemoryMode getMemoryMode() const;
      void setMemoryMode(Enums::MemoryMode mode);
''')

    memories = VectorParam.AbstractMemory(Self.all,
                                          "All memories in the system")
    mem_mode = Param.MemoryMode('atomic', "The mode the memory system is in")

    # The memory ranges are to be populated when creating the system
    # such that these can be passed from the I/O subsystem through an
    # I/O bridge or cache
    mem_ranges = VectorParam.AddrRange([], "Ranges that constitute main memory")

    work_item_id = Param.Int(-1, "specific work item id")
    num_work_ids = Param.Int(16, "Number of distinct work item types")
    work_begin_cpu_id_exit = Param.Int(-1,
        "work started on specific id, now exit simulation")
    work_begin_ckpt_count = Param.Counter(0,
        "create checkpoint when work items begin count value is reached")
    work_begin_exit_count = Param.Counter(0,
        "exit simulation when work items begin count value is reached")
    work_end_ckpt_count = Param.Counter(0,
        "create checkpoint when work items end count value is reached")
    work_end_exit_count = Param.Counter(0,
        "exit simulation when work items end count value is reached")
    work_cpus_ckpt_count = Param.Counter(0,
        "create checkpoint when active cpu count value is reached")

    init_param = Param.UInt64(0, "numerical value to pass into simulator")
    boot_osflags = Param.String("a", "boot flags to pass to the kernel")
    kernel = Param.String("", "file that contains the kernel code")
    readfile = Param.String("", "file to read startup script from")
    symbolfile = Param.String("", "file to get the symbols from")
    load_addr_mask = Param.UInt64(0xffffffffff,
            "Address to mask loading binaries with");