32 lines
682 B
Rust
32 lines
682 B
Rust
use core::intrinsics::{volatile_load, volatile_store};
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use core::mem::uninitialized;
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use core::ops::{BitAnd, BitOr, Not};
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use super::io::Io;
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#[repr(packed)]
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pub struct Mmio<T> {
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value: T,
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}
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impl<T> Mmio<T> {
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/// Create a new Mmio without initializing
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pub fn new() -> Self {
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Mmio {
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value: unsafe { uninitialized() }
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}
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}
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}
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impl<T> Io for Mmio<T> where T: Copy + PartialEq + BitAnd<Output = T> + BitOr<Output = T> + Not<Output = T> {
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type Value = T;
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fn read(&self) -> T {
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unsafe { volatile_load(&self.value) }
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}
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fn write(&mut self, value: T) {
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unsafe { volatile_store(&mut self.value, value) };
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}
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}
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