#include <stdint.h>

struct IDTDescr {
   uint16_t offset_1; // offset bits 0..15
   uint16_t selector; // a code segment selector in GDT or LDT
   uint8_t ist;       // bits 0..2 holds Interrupt Stack Table offset, rest of bits zero.
   uint8_t type_attr; // type and attributes
   uint16_t offset_2; // offset bits 16..31
   uint32_t offset_3; // offset bits 32..63
   uint32_t zero;     // reserved
};

enum GateType {
    CALL64 = 0xC,
    INT64  = 0xE,
    TRAP64 = 0xF,
};

void init_idt();
void set_idt_ent(uint8_t index, uint64_t offset, uint8_t ist, uint8_t min_priv_level, enum GateType type);
void* get_idt_fn(uint8_t index);
void clear_idt_ent(uint8_t index);