/**************************************************************************************
 Copyright (c) 2002
      The UbixOS Project

 $Id$
**************************************************************************************/

#include <ubixos/gdt.h>
#include <ubixos/schedule.h>
#include <ubixos/idt.h>
#include <drivers/video.h>
#include <drivers/8259.h>
#include <drivers/keyboard.h>
#include <version/version.h>

int main();

descriptorTable(GDT,5) {
  {dummy:0},
  standardDescriptor(0, 0xFFFFF, (dCode + dRead + dBig + dBiglim)),
  standardDescriptor(0, 0xFFFFF, (dData + dWrite + dBig + dBiglim)),
  standardDescriptor(0, 0xFFFFF, (dLdt)),
  standardDescriptor(1000, (sizeof(struct tssStruct)-1), (dTss)),
  };

struct {
  unsigned short limit __attribute__ ((packed));
  union descriptorTableunion *gdt __attribute__ ((packed));
  } loadGdt = { (5 * sizeof(union descriptorTableunion) - 1), GDT };

void _start(void) {
  asm(
    "lgdtl (loadGdt)   \n"
    "movw $0x10,%ax    \n"
    "movw %ax,%ds      \n"
    "movw %ax,%es      \n"
    "movw %ax,%fs      \n"
    "movw %ax,%gs      \n"
    "movw %ax,%ss      \n"
    "movl $0xFFFF,%esp \n"
    "mov $0x18,%ax     \n" //Set up dummy LDT
    "lldt %ax          \n"
    "mov $0x20,%ax     \n" // Set up dummy TSS
    "ltr %ax           \n" // Loads dummy TSS
    );
  main(); //Start Of Kernel Functionality
  while(1);
  }

int main() {
  clearScreen();
  outputVersion(); //Display Version Info
  initPaging();

  init8259();      //Initialize PIC
  initIdt();       //Initialize IDT
  initKeyboard();  //Initialize Keyboard
  initScheduler(); //Initialize Scheduler
  return(0);
  }