ladybird/Kernel/IO.h

#pragma once

#include <AK/Types.h>

namespace IO {

inline u8 in8(u16 port)
{
    u8 value;
    asm volatile("inb %1, %0"
                 : "=a"(value)
                 : "Nd"(port));
    return value;
}

inline u16 in16(u16 port)
{
    u16 value;
    asm volatile("inw %1, %0"
                 : "=a"(value)
                 : "Nd"(port));
    return value;
}

inline u32 in32(u16 port)
{
    u32 value;
    asm volatile("inl %1, %0"
                 : "=a"(value)
                 : "Nd"(port));
    return value;
}

inline void repeated_in16(u16 port, u8* buffer, int buffer_size)
{
    asm volatile("rep insw"
                 : "+D"(buffer), "+c"(buffer_size)
                 : "d"(port)
                 : "memory");
}

inline void out8(u16 port, u8 value)
{
    asm volatile("outb %0, %1" ::"a"(value), "Nd"(port));
}

inline void out16(u16 port, u16 value)
{
    asm volatile("outw %0, %1" ::"a"(value), "Nd"(port));
}

inline void out32(u16 port, u32 value)
{
    asm volatile("outl %0, %1" ::"a"(value), "Nd"(port));
}

inline void repeated_out16(u16 port, const u8* data, int data_size)
{
    asm volatile("rep outsw"
                 : "+S"(data), "+c"(data_size)
                 : "d"(port));
}

}