arm7_mmu.h

浙江大学的悟空嵌入式系统模拟器

/*
 *  Copyright (c) 2005 Zhejiang University, P.R.China
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */ 

//=============================================================================
/**
 *  \file    ARM/ARM7_MMU.h
 *
 *  $Id: ARM7_MMU.h,v 1.2 2005/06/15 12:50:42 jiajc Exp $
 *
 *  \author  Juncheng Jia <[e-mail]>
 */
//=============================================================================

#ifndef ARM__ARM7_MMU_H_INCLUDED
#define ARM__ARM7_MMU_H_INCLUDED

#include "MMU.h"
#include "Coprocessor.h"
#include "Processor_720T.h"

namespace ARM {

	class ARM7_CP15;

	//! MMU for ARM720T
	class ARM7_MMU : public MMU
	{
		friend ARM7_CP15;
	public:
		//! Ctor
		ARM7_MMU(void);

		//! Dtor
		virtual ~ARM7_MMU(void);

	protected:
		virtual Memory_Result data_read(u32 start, size_t size, Bytecode_Type & buffer);

		virtual Memory_Result data_write(u32 start, size_t size, Bytecode_Type & buffer);

		virtual Memory_Result instr_read(u32 start, size_t size, Bytecode_Type & buffer);

		//! ARM720T has a unified tlb
		TLB * tlb_;

		//! ARM720T has a unified cache
		Cache * cache_;

	};

	//! CP15 for ARM720T
	class ARM7_CP15 : public CP15
	{
	public:
		//! Ctor
		ARM7_CP15(u32 id_code);

		//! Dtor
		virtual ~ARM7_CP15();

		void on_create();

		void on_reset();

		void on_destroy(){}

		void MCR(Core::Instruction_Unit binary);

		void MRC(Core::Instruction_Unit binary);

	private:	
		CPU_720T * get_cpu();	
		ARM7_MMU * get_mmu();
		
	};
} // namespace
#endif