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# Authors: Andreas Sandberg

from abc import ABCMeta, abstractmethod
import m5
from m5.objects import *
from m5.proxy import *
m5.util.addToPath('../configs/common')
from Benchmarks import SysConfig
import FSConfig
from Caches import *
from base_config import *

class LinuxX86SystemBuilder(object):
    """Mix-in that implements create_system.

    This mix-in is intended as a convenient way of adding an
    X86-specific create_system method to a class deriving from one of
    the generic base systems.
    """
    def __init__(self):
        pass

    def create_system(self):
        mdesc = SysConfig(disk = 'linux-x86.img')
        system = FSConfig.makeLinuxX86System(self.mem_mode,
                                             numCPUs=self.num_cpus,
                                             mdesc=mdesc)

        self.init_system(system)
        return system

class LinuxX86FSSystem(LinuxX86SystemBuilder,
                       BaseFSSystem):
    """Basic X86 full system builder."""

    def __init__(self, **kwargs):
        """Initialize an X86 system that supports full system simulation.

        Note: Keyword arguments that are not listed below will be
        passed to the BaseFSSystem.

        Keyword Arguments:
          machine_type -- String describing the platform to simulate
        """
        BaseSystem.__init__(self, **kwargs)
        LinuxX86SystemBuilder.__init__(self)

    def create_caches_private(self, cpu):
        cpu.addPrivateSplitL1Caches(L1Cache(size='32kB', assoc=1),
                                    L1Cache(size='32kB', assoc=4),
                                    PageTableWalkerCache(),
                                    PageTableWalkerCache())

class LinuxX86FSSystemUniprocessor(LinuxX86SystemBuilder,
                                   BaseFSSystemUniprocessor):
    """Basic X86 full system builder for uniprocessor systems.

    Note: This class is a specialization of the X86FSSystem and is
    only really needed to provide backwards compatibility for existing
    test cases.
    """

    def __init__(self, **kwargs):
        BaseFSSystemUniprocessor.__init__(self, **kwargs)
        LinuxX86SystemBuilder.__init__(self)

    def create_caches_private(self, cpu):
        cpu.addTwoLevelCacheHierarchy(L1Cache(size='32kB', assoc=1),
                                      L1Cache(size='32kB', assoc=4),
                                      L2Cache(size='4MB', assoc=8),
                                      PageTableWalkerCache(),
                                      PageTableWalkerCache())


class LinuxX86FSSwitcheroo(LinuxX86SystemBuilder, BaseFSSwitcheroo):
    """Uniprocessor X86 system prepared for CPU switching"""

    def __init__(self, **kwargs):
        BaseFSSwitcheroo.__init__(self, **kwargs)
        LinuxX86SystemBuilder.__init__(self)
