crates/kernel/src/arch/riscv64/mod.rs


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use crate::cpu_locals::CPULocals;
use core::{arch::asm, ptr::NonNull};

pub mod interrupts;
pub mod paging;

/// Returns a pointer to the per-CPU locals.
pub fn get_cpu_locals() -> NonNull<CPULocals> {
    // SAFETY: The entrypoint sets this up, and safe code cannot invalidate it.
    unsafe {
        let tp;
        asm!("mv {out}, tp", out = out(reg) tp);
        NonNull::new_unchecked(tp)
    }
}

/// Halts the hart.
pub fn sleep_forever() -> ! {
    loop {
        unsafe { asm!("wfi") }
    }
}