pcsx2/pcsx2/R5900Exceptions.h

/*  PCSX2 - PS2 Emulator for PCs
 *  Copyright (C) 2002-2009  PCSX2 Dev Team
 * 
 *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU Lesser General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  PCSX2 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 PCSX2.
 *  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef _R5900_EXCEPTIONS_H_
#define _R5900_EXCEPTIONS_H_

namespace R5900Exception
{
	using Exception::Ps2Generic;

	//////////////////////////////////////////////////////////////////////////////////////////
	// Abstract base class for R5900 exceptions; contains the cpuRegs instance at the
	// time the exception is raised.
	//
	// Translation note: EE Emulation exceptions are untranslated only.  There's really no
	// point in providing translations for this hardcore mess. :)
	//
	class BaseExcept : public virtual Ps2Generic
	{
	public:
		cpuRegisters cpuState;

	public:
		virtual ~BaseExcept() throw()=0;

		u32 GetPc() const { return cpuState.pc; }
		bool IsDelaySlot() const { return !!cpuState.IsDelaySlot; }

	protected:
		void Init( const wxString& msg )
		{
			m_message = L"(EE) " + msg;
			cpuState = cpuRegs;
		}

		void Init( const char*msg )
		{
			m_message = fromUTF8( msg );
			cpuState = cpuRegs;
		}
	};

	//////////////////////////////////////////////////////////////////////////////////
	//
	class BaseAddressError : public BaseExcept
	{
	public:
		bool OnWrite;
		u32 Address;

	public:
		virtual ~BaseAddressError() throw() {}
		
	protected:
		void Init( u32 ps2addr, bool onWrite, const wxString& msg )
		{
			BaseExcept::Init( wxsFormat( msg+L", addr=0x%x [%s]", ps2addr, onWrite ? L"store" : L"load" ) );
			OnWrite = onWrite;
			Address = ps2addr;
		}
	};
	
	
	class AddressError : public BaseAddressError
	{
	public:
		virtual ~AddressError() throw() {}

		AddressError( u32 ps2addr, bool onWrite )
		{
			BaseAddressError::Init( ps2addr, onWrite, L"Address error" );
		}
	};
	
	//////////////////////////////////////////////////////////////////////////////////
	//
	class TLBMiss : public BaseAddressError
	{
	public:
		virtual ~TLBMiss() throw() {}

		TLBMiss( u32 ps2addr, bool onWrite )
		{
			BaseAddressError::Init( ps2addr, onWrite, L"TLB Miss" );
		}
	};

	//////////////////////////////////////////////////////////////////////////////////
	//
	class BusError : public BaseAddressError
	{
	public:
		virtual ~BusError() throw() {}

		BusError( u32 ps2addr, bool onWrite )
		{
			BaseAddressError::Init( ps2addr, onWrite, L"Bus Error" );
		}
	};
	
	//////////////////////////////////////////////////////////////////////////////////
	//
	class Trap : public BaseExcept
	{
	public:
		u16 TrapCode;

	public:
		virtual ~Trap() throw() {}

		// Generates a trap for immediate-style Trap opcodes
		Trap()
		{
			BaseExcept::Init( "Trap" );
			TrapCode = 0;
		}

		// Generates a trap for register-style Trap instructions, which contain an
		// error code in the opcode
		explicit Trap( u16 trapcode )
		{
			BaseExcept::Init( "Trap" ),
			TrapCode = trapcode;
		}
	};

	//////////////////////////////////////////////////////////////////////////////////
	//
	class DebugBreakpoint : public BaseExcept
	{
	public:
		virtual ~DebugBreakpoint() throw() {}

		explicit DebugBreakpoint()
		{
			BaseExcept::Init( "Debug Breakpoint" );
		}
	};
}


#endif