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

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

#include <ubixos/gdt.h>
#include <ubixos/scheduler.h>
#include <version/version.h>
#include <drivers/video.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 *idt __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);
  }

/*
void _start() {
  asm(
    "lgdt (loadgdt)     \n"
    "mov $0x18,%%ax  \n"
    "ltr %%ax        \n"
    :
    : "r" (GDT)
    );
  main();
  while (1);
  }
  */

int main() {
  clearScreen();
  outputVersion();  //Display Version Info
  return(0);
  }