class Cache {
	public:
		typedef unsigned long addr_t;
		typedef unsigned long page_t;
		typedef unsigned long counter_t;

		virtual void read(addr_t address);
		virtual void write(addr_t address);
		virtual void flush();

		virtual counter_t getHits() const;
		virtual counter_t getMisses() const;
		virtual counter_t getMissesWB() const;
};