fix(port_riscv): call Timer::init in port_boot

This call was missing due to an oversight.

Author: yvt

src/r3_port_riscv/CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Fixed
 
 - The default stack alignment (`PortThreading::STACK_ALIGN`) now conforms to the standard ABI requirement (128-bit alignment).
+- The port startup code now calls `<Traits as Timer>::init`.
 
 ## [0.1.3] - 2021-10-29
 

src/r3_port_riscv/src/threading/cfg.rs

@@ -30,12 +30,13 @@ pub const PRIVILEGE_LEVEL_USER: u8 = 0b00;
 
 /// Define a kernel trait type implementing [`PortThreading`],
 /// [`PortInterrupts`], and [`EntryPoint`].
-/// **Requires [`ThreadingOptions`] and [`InterruptController`].**
+/// **Requires [`ThreadingOptions`], [`Timer`], and [`InterruptController`].**
 ///
 /// [`PortThreading`]: r3_kernel::PortThreading
 /// [`PortInterrupts`]: r3_kernel::PortInterrupts
 /// [`EntryPoint`]: crate::EntryPoint
 /// [`InterruptController`]: crate::InterruptController
+/// [`Timer`]: crate::Timer
 #[macro_export]
 macro_rules! use_port {
     (unsafe $vis:vis struct $Traits:ident) => {

src/r3_port_riscv/src/threading/imp.rs

@@ -10,7 +10,9 @@ use r3_core::{
 use r3_kernel::{KernelTraits, Port, PortToKernel, System, TaskCb};
 use r3_portkit::pptext::pp_asm;
 
-use crate::{InterruptController, ThreadingOptions, INTERRUPT_PLATFORM_START, INTERRUPT_SOFTWARE};
+use crate::{
+    InterruptController, ThreadingOptions, Timer, INTERRUPT_PLATFORM_START, INTERRUPT_SOFTWARE,
+};
 
 /// `XLEN / 8`
 const X_SIZE: usize = core::mem::size_of::<usize>();
@@ -160,7 +162,7 @@ const XSTATUS_PART_MASK: usize = csr::XSTATUS_FS_1;
 ///
 /// Only meant to be implemented by [`use_port!`].
 pub unsafe trait PortInstance:
-    KernelTraits + Port<PortTaskState = TaskState> + ThreadingOptions + InterruptController
+    KernelTraits + Port<PortTaskState = TaskState> + ThreadingOptions + InterruptController + Timer
 {
     fn port_state() -> &'static State;
 
@@ -231,6 +233,9 @@ impl State {
         // Safety: We are the port, so it's okay to call this
         unsafe { <Traits as InterruptController>::init() };
 
+        // Safety: We are the port, so it's okay to call this
+        unsafe { <Traits as Timer>::init() };
+
         // Enable local interrupts
         {
             let mut clear_set = [0usize; 2];