kernel/include/main/io.h


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#pragma once

#include "kernel.h"
#include "types.h"

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;
}