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from abc import abstractmethod
from ...utils.override import overrides
from ..abstract_cache_hierarchy import AbstractCacheHierarchy

from m5.objects import Port


class AbstractClassicCacheHierarchy(AbstractCacheHierarchy):
    """
    All classic cache hierarchies inherit from this class. This class
    provides the shared infrastructure that all classic memory system
    implementations need.
    """

    def __init__(self):
        super(AbstractClassicCacheHierarchy, self).__init__()

    @overrides(AbstractCacheHierarchy)
    def is_ruby(self) -> bool:
        return False

    @abstractmethod
    def get_mem_side_port(self) -> Port:
        raise NotImplementedError

    @abstractmethod
    def get_cpu_side_port(self) -> Port:
        raise NotImplementedError