main.cc

一个mips虚拟机非常好代码,使用C++来编写的,希望大家多学学,

// U4600 LCD Module
// Matt Chapman <[e-mail]>

#include <stdio.h>
#include <string.h>
#include <assert.hh>
#include "lcd.hh"


// Serialization information.

SerialType<U4600_LCD> U4600_LCD::type(
    "U4600_LCD",
    "U4600 LCD Module"
);


// Runtime constructor.

U4600_LCD::U4600_LCD(const SimArgs& args)
    : Module(args), Device(8)
{
    if (args.length() > 2)
	throw Error("Too many arguments to \"sim::install U4600_LCD\".");
}


// Serialized constructor.

U4600_LCD::U4600_LCD(Checkpoint& cp)
    : Module(cp), Device(8)
{
}


// Module interface.

void
U4600_LCD::reset(bool warm)
{
    for (int i = 0; i < 4; i++)
	lcd_contents[i] = ' ';
}


// Serialization interface.

void
U4600_LCD::checkpoint(Checkpoint& cp, bool parent) const
{
}


void
U4600_LCD::show_lcd()
{
    log("%c%c%c%c", lcd_contents[3], lcd_contents[2], lcd_contents[1], lcd_contents[0]);
}


ClockValue
U4600_LCD::read(UInt64 addr, UInt64* buf, int size)
{
    unsigned int offset = addr & 3;
    *buf = lcd_contents[offset];
    return 0; // ignore latency
}


ClockValue
U4600_LCD::write(UInt64 addr, const UInt64* buf, int size)
{
    unsigned int offset = addr & 3;
    lcd_contents[offset] = *buf;
    show_lcd();
    return 0; // ignore latency
}