Untitled_Kernel/src/main.c

//Our own code, at this point...
//Output table:
//0: VGA
//1: COM1
#define OUTPUT_TYPE 1
#include <stdint.h>
#include "vga.h"
#include "io.h"
#include "kttools.h"
#include "kmultiboot.h"
#include "idt.h"
#include "serial.h"
void kern_main(uint32_t multiboot_magic, mb_info_t* multiboot_info)
{
    //Hello C! Let's get to work in cleaning up our environment a bit and creating some safety.
    //First interrupts.
    setup_idt();
 
    //Let's pick an output schema.
    int (*outWriter)(char) = 0;
    int comstatus = 1234;
    switch(OUTPUT_TYPE) {
        case 1:
            comstatus = serial_init(COM1);
            if(comstatus) {
                //Fail...
                break; 
            }
            outWriter = serial_send8;
            break;
    }
    //VGA is selected or the selected option failed, falling back 
    if(outWriter == 0){
        outWriter = vga_out;
        vga_clear();
    }

    printf(outWriter, "Entry eax:%X\n", multiboot_magic);

    if(multiboot_magic != 0x2BADB002) {
        println(outWriter, writerState, "Bootloader not multiboot1 compliant! Needed for mmap, etc. Can't work without it, kthxbye!");
        return;
    } else {
        println(outWriter, writerState, "Multiboot detected! Continuing...");
    }

    printf(outWriter, writerState, "MEM_LOWER:%X\n", multiboot_info->mem_lower);
    printf(outWriter, writerState"MEM_UPPER:%X\n", multiboot_info->mem_upper);
}