/* Author      : Rick van der Zwet
 * S-number    : 0433373
 * Version     : $Id: memory.h 363 2007-12-03 06:07:31Z rick $
 * Copyright   : FreeBSD Licence
 * Description : Memory unit header
 */

#ifndef MEMORY_H
#define MEMORY_H

#include "sim.h"

/* Signal */
boolean mem_busy;

union memword_t {
    byte byte[4];
    halfword halfword[2];
    word fullword;
};

/* Control signal */
typedef enum {
    MEM_STALLED,
    READ,
    WRITE_BYTE,
    WRITE_HALFWORD,
    WRITE_WORD
} mem_control_t;

void readmem();
void writemem();
word mem_operation(const word address, const word value,
                   const mem_control_t action);
#endif