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use core::marker::PhantomData;
pub use crate::structures::port::{PortRead, PortReadWrite, PortWrite};
impl PortRead for u8 {
#[inline]
unsafe fn read_from_port(port: u16) -> u8 {
let value: u8;
asm!("inb %dx, %al" : "={al}"(value) : "{dx}"(port) :: "volatile");
value
}
}
impl PortRead for u16 {
#[inline]
unsafe fn read_from_port(port: u16) -> u16 {
let value: u16;
asm!("inw %dx, %ax" : "={ax}"(value) : "{dx}"(port) :: "volatile");
value
}
}
impl PortRead for u32 {
#[inline]
unsafe fn read_from_port(port: u16) -> u32 {
let value: u32;
asm!("inl %dx, %eax" : "={eax}"(value) : "{dx}"(port) :: "volatile");
value
}
}
impl PortWrite for u8 {
#[inline]
unsafe fn write_to_port(port: u16, value: u8) {
asm!("outb %al, %dx" :: "{dx}"(port), "{al}"(value) :: "volatile");
}
}
impl PortWrite for u16 {
#[inline]
unsafe fn write_to_port(port: u16, value: u16) {
asm!("outw %ax, %dx" :: "{dx}"(port), "{ax}"(value) :: "volatile");
}
}
impl PortWrite for u32 {
#[inline]
unsafe fn write_to_port(port: u16, value: u32) {
asm!("outl %eax, %dx" :: "{dx}"(port), "{eax}"(value) :: "volatile");
}
}
impl PortReadWrite for u8 {}
impl PortReadWrite for u16 {}
impl PortReadWrite for u32 {}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct PortReadOnly<T: PortRead> {
port: u16,
phantom: PhantomData<T>,
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct PortWriteOnly<T: PortWrite> {
port: u16,
phantom: PhantomData<T>,
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Port<T: PortReadWrite> {
port: u16,
phantom: PhantomData<T>,
}
impl<T: PortRead> PortReadOnly<T> {
pub const fn new(port: u16) -> PortReadOnly<T> {
PortReadOnly {
port: port,
phantom: PhantomData,
}
}
#[inline]
pub unsafe fn read(&self) -> T {
T::read_from_port(self.port)
}
}
impl<T: PortWrite> PortWriteOnly<T> {
pub const fn new(port: u16) -> PortWriteOnly<T> {
PortWriteOnly {
port: port,
phantom: PhantomData,
}
}
#[inline]
pub unsafe fn write(&mut self, value: T) {
T::write_to_port(self.port, value)
}
}
impl<T: PortReadWrite> Port<T> {
pub const fn new(port: u16) -> Port<T> {
Port {
port: port,
phantom: PhantomData,
}
}
#[inline]
pub unsafe fn read(&self) -> T {
T::read_from_port(self.port)
}
#[inline]
pub unsafe fn write(&mut self, value: T) {
T::write_to_port(self.port, value)
}
}