#pragma once

#if !defined(BAD_APPLE_OS_KERNEL_PIC_HPP_INCLUDED)
#define BAD_APPLE_OS_KERNEL_PIC_HPP_INCLUDED

#include <cstdint>

#include "os/port.hpp"

inline constexpr std::uint16_t PORT_PIC1 = 0x20;
inline constexpr std::uint16_t PORT_PIC2 = 0xA0;
inline constexpr std::uint8_t PIC_CMD_EOI = 0x20;

[[nodiscard]] bool initPICs(std::uint8_t masterOffset, std::uint8_t slaveOffset) noexcept;
__attribute__((no_caller_saved_registers))
void sendEndOfInterrupt(std::uint8_t irq) noexcept;
void maskIRQ(std::uint8_t irq) noexcept;
void unmaskIRQ(std::uint8_t irq) noexcept;
[[nodiscard]] std::uint16_t readPICIRR() noexcept;
[[nodiscard]] std::uint16_t readPICISR() noexcept;

[[nodiscard]] constexpr bool isValidPICOffset(std::uint8_t offset) noexcept
{
    return (offset & 7) == 0;
}

#if defined(__x86_64__)
struct InterruptFrame
{
    std::uint64_t ip;
    std::uint64_t cs;
    std::uint64_t flags;
    std::uint64_t sp;
    std::uint64_t ss;
};
#endif

using interrupt_handler_t = __attribute__((interrupt)) void(*)(InterruptFrame*);

#endif // !defined(BAD_APPLE_OS_KERNEL_PIC_HPP_INCLUDED)