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/**
* Copyright (C) 2013 Citrus Emulator
*
* @file arm_interface.h
* @author bunnei
* @date 2014-04-04
* @brief Generic ARM CPU core interface
*
* @section LICENSE
* 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 at
* http://www.gnu.org/copyleft/gpl.html
*
* Official project repository can be found at:
* http://code.google.com/p/gekko-gc-emu/
*/
#pragma once
#include "common.h"
#include "common_types.h"
/// Generic ARM11 CPU interface
class ARM_Interface {
public:
ARM_Interface() {
num_instructions_ = 0;
}
~ARM_Interface() {
}
/// Step CPU by one instruction
void Step() {
ExecuteInstruction();
num_instructions_++;
}
/**
* Set the Program Counter to an address
* @param addr Address to set PC to
*/
virtual void SetPC(u32 addr) = 0;
/*
* Get the current Program Counter
* @return Returns current PC
*/
virtual u32 PC() = 0;
/**
* Get an ARM register
* @param index Register index (0-15)
* @return Returns the value in the register
*/
virtual u32 Reg(int index) = 0;
/**
* Get the current CPSR register
* @return Returns the value of the CPSR register
*/
virtual u32 CPSR() = 0;
/**
* Returns the number of clock ticks since the last rese
* @return Returns number of clock ticks
*/
virtual u64 GetTicks() = 0;
/// Getter for num_instructions_
u64 num_instructions() { return num_instructions_; }
private:
/// Execture next instruction
virtual void ExecuteInstruction() = 0;
u64 num_instructions_; ///< Number of instructions executed
DISALLOW_COPY_AND_ASSIGN(ARM_Interface);
};
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