mirror of
https://github.com/rtic-rs/rtic.git
synced 2024-11-23 12:12:50 +01:00
partial thumbv6m-none-eabi support
This commit is contained in:
Jorge Aparicio
parent
01c8c3312d
commit
e631d8513a
2 changed files with 50 additions and 119 deletions
9
build.rs
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9
build.rs
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@ -0,0 +1,9 @@
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use std::env;
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fn main() {
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let target = env::var("TARGET").unwrap();
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if target == "thumbv6m-none-eabi" {
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println!("cargo:rustc-cfg=thumbv6m");
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}
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}
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160
src/lib.rs
160
src/lib.rs
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@ -1,6 +1,6 @@
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//! Stack Resource Policy for Cortex-M processors
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//!
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//! NOTE ARMv6-M is not supported at the moment.
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//! NOTE ARMv6-M is not fully supported at the moment.
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#![deny(missing_docs)]
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#![deny(warnings)]
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@ -12,18 +12,24 @@ extern crate cortex_m;
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use cortex_m::ctxt::Context;
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use cortex_m::interrupt::{CriticalSection, Nr};
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use cortex_m::peripheral::{Peripheral, NVIC, SCB};
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use cortex_m::peripheral::{Peripheral, NVIC};
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#[cfg(not(thumbv6m))]
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use cortex_m::peripheral::SCB;
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#[cfg(not(thumbv6m))]
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use cortex_m::register::{basepri, basepri_max};
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use core::cell::UnsafeCell;
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use core::marker::PhantomData;
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#[cfg(not(thumbv6m))]
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use core::ptr;
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#[cfg(not(thumbv6m))]
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// NOTE Only the 4 highest bits of the priority byte (BASEPRI / NVIC.IPR) are
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// considered when determining priorities.
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const PRIORITY_BITS: u8 = 4;
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/// Logical task priority
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#[cfg(not(thumbv6m))]
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unsafe fn task_priority() -> u8 {
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// NOTE(safe) atomic read
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let nr = match (*SCB.get()).icsr.read() as u8 {
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@ -34,7 +40,7 @@ unsafe fn task_priority() -> u8 {
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hardware((*NVIC.get()).ipr[nr as usize].read())
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}
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#[cfg(debug_assertions)]
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#[cfg(all(debug_assertions, not(thumbv6m)))]
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unsafe fn get_check(logical_ceiling: u8) {
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let task_priority = task_priority();
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let system_ceiling = hardware(cortex_m::register::basepri::read());
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@ -69,7 +75,7 @@ unsafe fn get_check(logical_ceiling: u8) {
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#[cfg(not(debug_assertions))]
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unsafe fn get_check(_: u8) {}
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#[cfg(debug_assertions)]
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#[cfg(all(debug_assertions, not(thumbv6m)))]
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unsafe fn lock_check(ceiling: u8) {
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let ceiling = hardware(ceiling);
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let task_priority = task_priority();
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@ -87,6 +93,7 @@ unsafe fn lock_check(ceiling: u8) {
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unsafe fn lock_check(_: u8) {}
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// XXX Do we need memory / instruction / compiler barriers here?
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#[cfg(not(thumbv6m))]
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#[inline(always)]
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unsafe fn lock<T, R, C, F>(f: F, res: *const T, ceiling: u8) -> R
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where
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@ -102,6 +109,7 @@ where
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}
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// XXX Do we need memory / instruction / compiler barriers here?
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#[cfg(not(thumbv6m))]
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#[inline(always)]
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unsafe fn lock_mut<T, R, C, F>(f: F, res: *mut T, ceiling: u8) -> R
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where
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@ -157,6 +165,7 @@ where
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}
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}
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#[cfg(not(thumbv6m))]
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impl<P, C> ResourceP<P, C>
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where
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C: Ceiling,
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@ -303,6 +312,7 @@ impl<T, C> Resource<T, C> {
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}
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}
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#[cfg(not(thumbv6m))]
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impl<T, C> Resource<T, C>
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where
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C: Ceiling,
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@ -410,6 +420,7 @@ impl<T> Resource<T, C0> {
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unsafe impl<T, Ceiling> Sync for Resource<T, Ceiling> {}
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/// Maps a hardware priority to a logical priority
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#[cfg(not(thumbv6m))]
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fn hardware(priority: u8) -> u8 {
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16 - (priority >> (8 - PRIORITY_BITS))
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}
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@ -423,6 +434,7 @@ fn hardware(priority: u8) -> u8 {
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/// priorities like `1` and `2` aren't actually different)
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///
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/// NOTE Input `priority` must be in the range `[1, 16]` (inclusive)
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#[cfg(not(thumbv6m))]
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pub fn logical(priority: u8) -> u8 {
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assert!(priority >= 1 && priority <= 16);
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@ -449,6 +461,7 @@ pub struct C0 {
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/// A real ceiling
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// XXX this should be a "closed" trait
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#[cfg(not(thumbv6m))]
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pub unsafe trait Ceiling {
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/// Returns the logical ceiling as a number
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fn ceiling() -> u8;
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@ -463,8 +476,10 @@ pub unsafe trait CeilingLike {}
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/// This ceiling is lower than `C`
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// XXX this should be a "closed" trait
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#[cfg(not(thumbv6m))]
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pub unsafe trait HigherThan<C> {}
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#[cfg(not(thumbv6m))]
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macro_rules! ceiling {
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($ceiling:ident, $logical:expr) => {
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/// Ceiling
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@ -488,6 +503,11 @@ macro_rules! ceiling {
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}
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}
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#[cfg(thumbv6m)]
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macro_rules! ceiling {
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($($tt:tt)*) => {};
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}
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ceiling!(C1, 1);
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ceiling!(C2, 2);
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ceiling!(C3, 3);
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@ -504,123 +524,25 @@ ceiling!(C13, 13);
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ceiling!(C14, 14);
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ceiling!(C15, 15);
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unsafe impl HigherThan<C1> for C2 {}
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unsafe impl HigherThan<C1> for C3 {}
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unsafe impl HigherThan<C1> for C4 {}
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unsafe impl HigherThan<C1> for C5 {}
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unsafe impl HigherThan<C1> for C6 {}
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unsafe impl HigherThan<C1> for C7 {}
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unsafe impl HigherThan<C1> for C8 {}
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unsafe impl HigherThan<C1> for C9 {}
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unsafe impl HigherThan<C1> for C10 {}
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unsafe impl HigherThan<C1> for C11 {}
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unsafe impl HigherThan<C1> for C12 {}
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unsafe impl HigherThan<C1> for C13 {}
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unsafe impl HigherThan<C1> for C14 {}
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unsafe impl HigherThan<C1> for C15 {}
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#[cfg(not(thumbv6m))]
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macro_rules! higher_than {
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() => {};
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($lowest:ident, $($higher:ident,)*) => {
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$(
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unsafe impl HigherThan<$lowest> for $higher {}
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)*
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unsafe impl HigherThan<C2> for C3 {}
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unsafe impl HigherThan<C2> for C4 {}
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unsafe impl HigherThan<C2> for C5 {}
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unsafe impl HigherThan<C2> for C6 {}
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unsafe impl HigherThan<C2> for C7 {}
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unsafe impl HigherThan<C2> for C8 {}
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unsafe impl HigherThan<C2> for C9 {}
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unsafe impl HigherThan<C2> for C10 {}
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unsafe impl HigherThan<C2> for C11 {}
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unsafe impl HigherThan<C2> for C12 {}
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unsafe impl HigherThan<C2> for C13 {}
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unsafe impl HigherThan<C2> for C14 {}
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unsafe impl HigherThan<C2> for C15 {}
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higher_than!($($higher,)*);
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};
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}
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unsafe impl HigherThan<C3> for C4 {}
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unsafe impl HigherThan<C3> for C5 {}
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unsafe impl HigherThan<C3> for C6 {}
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unsafe impl HigherThan<C3> for C7 {}
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unsafe impl HigherThan<C3> for C8 {}
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unsafe impl HigherThan<C3> for C9 {}
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unsafe impl HigherThan<C3> for C10 {}
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unsafe impl HigherThan<C3> for C11 {}
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unsafe impl HigherThan<C3> for C12 {}
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unsafe impl HigherThan<C3> for C13 {}
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unsafe impl HigherThan<C3> for C14 {}
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unsafe impl HigherThan<C3> for C15 {}
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#[cfg(thumbv6m)]
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macro_rules! higher_than {
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($($tt:tt)*) => {};
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}
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unsafe impl HigherThan<C4> for C5 {}
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unsafe impl HigherThan<C4> for C6 {}
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unsafe impl HigherThan<C4> for C7 {}
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unsafe impl HigherThan<C4> for C8 {}
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unsafe impl HigherThan<C4> for C9 {}
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unsafe impl HigherThan<C4> for C10 {}
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unsafe impl HigherThan<C4> for C11 {}
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unsafe impl HigherThan<C4> for C12 {}
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unsafe impl HigherThan<C4> for C13 {}
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unsafe impl HigherThan<C4> for C14 {}
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unsafe impl HigherThan<C4> for C15 {}
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unsafe impl HigherThan<C5> for C6 {}
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unsafe impl HigherThan<C5> for C7 {}
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unsafe impl HigherThan<C5> for C8 {}
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unsafe impl HigherThan<C5> for C9 {}
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unsafe impl HigherThan<C5> for C10 {}
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unsafe impl HigherThan<C5> for C11 {}
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unsafe impl HigherThan<C5> for C12 {}
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unsafe impl HigherThan<C5> for C13 {}
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unsafe impl HigherThan<C5> for C14 {}
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unsafe impl HigherThan<C5> for C15 {}
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unsafe impl HigherThan<C6> for C7 {}
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unsafe impl HigherThan<C6> for C8 {}
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unsafe impl HigherThan<C6> for C9 {}
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unsafe impl HigherThan<C6> for C10 {}
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unsafe impl HigherThan<C6> for C11 {}
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unsafe impl HigherThan<C6> for C12 {}
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unsafe impl HigherThan<C6> for C13 {}
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unsafe impl HigherThan<C6> for C14 {}
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unsafe impl HigherThan<C6> for C15 {}
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unsafe impl HigherThan<C7> for C8 {}
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unsafe impl HigherThan<C7> for C9 {}
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unsafe impl HigherThan<C7> for C10 {}
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unsafe impl HigherThan<C7> for C11 {}
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unsafe impl HigherThan<C7> for C12 {}
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unsafe impl HigherThan<C7> for C13 {}
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unsafe impl HigherThan<C7> for C14 {}
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unsafe impl HigherThan<C7> for C15 {}
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unsafe impl HigherThan<C8> for C9 {}
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unsafe impl HigherThan<C8> for C10 {}
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unsafe impl HigherThan<C8> for C11 {}
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unsafe impl HigherThan<C8> for C12 {}
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unsafe impl HigherThan<C8> for C13 {}
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unsafe impl HigherThan<C8> for C14 {}
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unsafe impl HigherThan<C8> for C15 {}
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unsafe impl HigherThan<C9> for C10 {}
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unsafe impl HigherThan<C9> for C11 {}
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unsafe impl HigherThan<C9> for C12 {}
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unsafe impl HigherThan<C9> for C13 {}
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unsafe impl HigherThan<C9> for C14 {}
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unsafe impl HigherThan<C9> for C15 {}
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unsafe impl HigherThan<C10> for C11 {}
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unsafe impl HigherThan<C10> for C12 {}
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unsafe impl HigherThan<C10> for C13 {}
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unsafe impl HigherThan<C10> for C14 {}
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unsafe impl HigherThan<C10> for C15 {}
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unsafe impl HigherThan<C11> for C12 {}
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unsafe impl HigherThan<C11> for C13 {}
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unsafe impl HigherThan<C11> for C14 {}
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unsafe impl HigherThan<C11> for C15 {}
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unsafe impl HigherThan<C12> for C13 {}
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unsafe impl HigherThan<C12> for C14 {}
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unsafe impl HigherThan<C12> for C15 {}
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unsafe impl HigherThan<C13> for C14 {}
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unsafe impl HigherThan<C13> for C15 {}
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unsafe impl HigherThan<C14> for C15 {}
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higher_than! {
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C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15,
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}
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unsafe impl CeilingLike for C0 {}
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