#ifndef TYPES_H
#define TYPES_H

#include "consts.h"

typedef unsigned char u8_t;
typedef unsigned short u16_t;
typedef unsigned long u32_t;
typedef unsigned long long u64_t;

typedef u32_t reg_t;

/* Defines a GDT entry. We say packed, because it prevents the
 *  compiler from doing things that it thinks is best: Prevent
 *  compiler "optimization" by packing */
struct segdesc_s {		/* segment descriptor for protected mode */
  u16_t limit_low;
  u16_t base_low;
  u8_t base_middle;
  u8_t access;		/* |P|DL|1|X|E|R|A| */
  u8_t granularity;	/* |G|X|0|A|LIMT| */
  u8_t base_high;
} __attribute__((packed));;

struct gdt_ptr
{
  unsigned short limit;
  struct segdesc_s *base;
} __attribute__((packed));

struct tss_s {
  reg_t backlink;
  reg_t sp0;                    /* stack pointer to use during interrupt */
  reg_t ss0;                    /*   "   segment  "  "    "        "     */
  reg_t sp1;
  reg_t ss1;
  reg_t sp2;
  reg_t ss2;
  reg_t cr3;
  reg_t ip;
  reg_t flags;
  reg_t ax;
  reg_t cx;
  reg_t dx;
  reg_t bx;
  reg_t sp;
  reg_t bp;
  reg_t si;
  reg_t di;
  reg_t es;
  reg_t cs;
  reg_t ss;
  reg_t ds;
  reg_t fs;
  reg_t gs;
  reg_t ldt;
  u16_t trap;
  u16_t iobase;
};

#endif /* #ifndef TYPES_H */