banan-os/kernel/include/kernel/IO.h

#pragma once

#include <stdint.h>
#include <stddef.h>

namespace IO
{

	static inline void outb(uint16_t port, uint8_t val)
	{
		asm volatile("outb %0, %1" : : "a"(val), "Nd"(port));
	}

	static inline uint8_t inb(uint16_t port)
	{
		uint8_t ret;
		asm volatile("inb %1, %0" : "=a"(ret) : "Nd"(port));
		return ret;
	}

	static inline void outw(uint16_t port, uint16_t val)
	{
		asm volatile("outw %0, %1" : : "a"(val), "Nd"(port));
	}

	static inline uint16_t inw(uint16_t port)
	{
		uint16_t ret;
		asm volatile("inw %1, %0" : "=a"(ret) : "Nd"(port));
		return ret;
	}

	static inline void outl(uint16_t port, uint32_t val)
	{
		asm volatile("outl %0, %1" : : "a"(val), "Nd"(port));
	}

	static inline uint32_t inl(uint16_t port)
	{
		uint32_t ret;
		asm volatile("inl %1, %0" : "=a"(ret) : "Nd"(port));
		return ret;
	}

	static inline void insb(uint16_t port, uint8_t* buffer, size_t count)
	{
		asm volatile("rep insb" : "+D"(buffer), "+c"(count), "=m"(*buffer) : "Nd"(port) : "memory");
	}

	static inline void insw(uint16_t port, uint16_t* buffer, size_t count)
	{
		asm volatile("rep insw" : "+D"(buffer), "+c"(count), "=m"(*buffer) : "Nd"(port) : "memory");
	}

	static inline void insl(uint16_t port, uint32_t* buffer, size_t count)
	{
		asm volatile("rep insl" : "+D"(buffer), "+c"(count), "=m"(*buffer) : "Nd"(port) : "memory");
	}

	static inline void io_wait()
	{
		outb(0x80, 0);
	}

}