src/loader/cpu.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

// MIT License, Copyright (c) 2021 Marvin Borner

#include <cpu.h>

/**
 * CPU IO
 */

u8 inb(u16 port)
{
	u8 value;
	__asm__ volatile("inb %1, %0" : "=a"(value) : "Nd"(port));
	return value;
}

u16 inw(u16 port)
{
	u16 value;
	__asm__ volatile("inw %1, %0" : "=a"(value) : "Nd"(port));
	return value;
}

void outb(u16 port, u8 data)
{
	__asm__ volatile("outb %0, %1" ::"a"(data), "Nd"(port));
}