//
// mips.C
//
// Description:
//  The AD Modified MIPS32(TM) processor.
//
// Version:
//  $Id$
//
// Revision:
//  $Log$
//
// Author:
//  Brian J. Alliet
//

#include "includes.h"

static void run() {
	
    while(imem.MAR().uvalue() != 0xdeadbeef) {
	    
	// check if we have to stall :-(
        if(branch()) {
            if(CPUObject::debug&CPUObject::trace)
                cout << endl << "---> STALLING FOR THE NEXT CLOCK CYCLE <---" << endl;
        } else {
            fetch();
        }

        decode();
        execute();
        memory();
        writeback();
        Clock::tick();
    }
}

int main(int argc, char **argv) {

    if(argc < 2) {
        fprintf(stderr,"Usage: %s image\n",argv[0]);
        exit(EXIT_FAILURE);
    }
    bool debug = argc >= 3 && strcmp(argv[2],"debug")==0;

    std::cout << std::hex;
    if(debug) CPUObject::debug |= CPUObject::trace;
    
    // create all of the MIPS CPU hardware connections
    make_connections();

    // load I/D memory
    const char *image = argc < 2 ? "mem" : argv[1];
    imem.load(image);
    dmem.load(image);

    if(debug)
        imem.dump(0x10000,0x10073);
    
    if(argc >= 5) {
        long start = strtol(argv[3],NULL,0);
        long length = strtol(argv[4],NULL,0);
        dmem.dump(start,start+length-1);
    }
    
    // HACK: Initialize PC
    StorageObject& pc = imem.MAR();
    pc.latchFrom(imem.READ());
    Clock::tick();

    run();
    
    cout << *regs[V0] << endl;
    if(argc >= 5) {
        long start = strtol(argv[3],NULL,0);
        long length = strtol(argv[4],NULL,0);
        dmem.dump(start,start+length-1);
    }
    
    return EXIT_SUCCESS;
}