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

#ifndef ARM__XSCALE_MMU_H_INCLUDED
#define ARM__XSCALE_MMU_H_INCLUDED

#include "MMU.h"
#include "Coprocessor.h"
#include "Core/Processor.h"

namespace ARM{

	class XScale_CP15;

	//! MMU for XScale
	class XScale_MMU : public MMU
	{
		friend XScale_CP15;
	public:
		//! Ctor
		XScale_MMU(void);

		//! Dtor
		virtual ~XScale_MMU(void);

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

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

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

		//! get the modified virtual address from original virtual address
		u32 get_mva(u32 va);

		TLB * data_tlb_;

		TLB * instr_tlb_;

	};

	//! CP15 for XScale
	class XScale_CP15 :	public CP15
	{
	public:
		//! Ctor
		XScale_CP15(u32 id_code);

		//! Dtor
		virtual ~XScale_CP15();

		void on_create();

		void on_reset();

		void on_destroy() {}

		void MCR(Core::Instruction_Unit binary);

		void MRC(Core::Instruction_Unit binary);

	private:
		
		XScale_MMU * get_mmu();	
		
		Core::CPU_32Bit * get_cpu();
	};

} // namespace

#endif