main.c

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>

#include "includes/cpu.h"

// ANSI colors

#define ANSI_RED     "\x1b[31m"
#define ANSI_GREEN   "\x1b[32m"
#define ANSI_YELLOW  "\x1b[33m"
#define ANSI_BLUE    "\x1b[34m"
#define ANSI_MAGENTA "\x1b[35m"
#define ANSI_CYAN    "\x1b[36m"
#define ANSI_RESET   "\x1b[0m"

void read_file(CPU* cpu, char *filename)
{
	FILE *file;
	uint8_t *buffer;
	unsigned long fileLen;

	//Open file
	file = fopen(filename, "rb");
	if (!file)
	{
		fprintf(stderr, "Unable to open file %s", filename);
	}

	//Get file length
	fseek(file, 0, SEEK_END);
	fileLen=ftell(file);
	fseek(file, 0, SEEK_SET);

	//Allocate memory
	buffer=(uint8_t *)malloc(fileLen+1);
	if (!buffer)
	{
		fprintf(stderr, "Memory error!");
        fclose(file);
	}

	//Read file contents into buffer
	fread(buffer, fileLen, 1, file);
	fclose(file);

    // Print file contents in hex
    /*for (int i=0; i<fileLen; i+=2) {*/
        /*if (i%16==0) printf("\n%.8x: ", i);*/
        /*printf("%02x%02x ", *(buffer+i), *(buffer+i+1));*/
    /*}*/
    /*printf("\n");*/

    // copy the bin executable to dram
    memcpy(cpu->bus.dram.mem, buffer, fileLen*sizeof(uint8_t));
	free(buffer);
}

int main(int argc, char* argv[]) {
    if (argc != 2) {
        printf("Usage: rvemu <filename>\n");
        exit(1);
    }

    // Initialize cpu, registers and program counter
    struct CPU cpu;
    cpu_init(&cpu);
    // Read input file
    read_file(&cpu, argv[1]);

    // cpu loop
    while (1) {
        // fetch
        uint32_t inst = cpu_fetch(&cpu);
        // Increment the program counter
        cpu.pc += 4;
        // execute
        if (!cpu_execute(&cpu, inst))
            break;

        dump_registers(&cpu);

        if(cpu.pc==0)
            break;
    }
    /*dump_registers(&cpu);*/
    return 0;
}