#ifndef KERNEL_CPU_IDT_H
#define KERNEL_CPU_IDT_H

#include "types.h"

typedef struct registers
{
    uint32_t ds;                  // Data segment selector
    uint32_t edi, esi, ebp, esp, ebx, edx, ecx, eax; // Pushed by pusha.
    uint32_t int_no, err_code;    // Interrupt number and error code (if applicable)
    uint32_t eip, cs, eflags, useresp, ss; // Pushed by the processor automatically.
} registers_t;

void isr_handler(registers_t);

// A struct describing an interrupt gate.
struct idt_entry_struct
        {
    uint16_t base_lo;             // The lower 16 bits of the address to jump to when this interrupt fires.
    uint16_t sel;                 // Kernel segment selector.
    uint8_t  always0;             // This must always be zero.
    uint8_t  flags;               // More flags. See documentation.
    uint16_t base_hi;             // The upper 16 bits of the address to jump to.
        } __attribute__((packed));
typedef struct idt_entry_struct idt_entry_t;

// A struct describing a pointer to an array of interrupt handlers.
// This is in a format suitable for giving to 'lidt'.
struct idt_ptr_struct {
    uint16_t limit;
    uint32_t base;                // The address of the first element in our idt_entry_t array.
} __attribute__((packed));
typedef struct idt_ptr_struct idt_ptr_t;

extern void idt_flush(uint32_t);

static void init_idt();
static void idt_set_gate(uint8_t, uint32_t, uint16_t, uint8_t);

idt_entry_t idt_entries[256];
idt_ptr_t idt_ptr;

// References to ASM ISR handlers
extern void isr0();
extern void isr1();
extern void isr2();
extern void isr3();
extern void isr4();
extern void isr5();
extern void isr6();
extern void isr7();
extern void isr8();
extern void isr9();
extern void isr10();
extern void isr11();
extern void isr12();
extern void isr13();
extern void isr14();
extern void isr15();
extern void isr16();
extern void isr17();
extern void isr18();
extern void isr19();
extern void isr20();
extern void isr21();
extern void isr22();
extern void isr23();
extern void isr24();
extern void isr25();
extern void isr26();
extern void isr27();
extern void isr28();
extern void isr29();
extern void isr30();
extern void isr31();

#endif //KERNEL_CPU_IDT_H