RISC-V support over CLINT (#815)

* Rebase to master

* using interrupt_mod

* bug fixes

* fix other backends

* Add changelog

* forgot about rtic-macros

* backend-specific configuration

* core peripherals optional over macro argument

* pre_init_preprocessing binding

* CI for RISC-V (WIP)

* separation of concerns

* add targets for RISC-V examples

* remove qemu feature

* prepare examples folder

* move examples all together

* move ci out of examples

* minor changes

* add cortex-m

* new xtask: proof of concept

* fix build.yml

* feature typo

* clean rtic examples

* reproduce weird issue

* remove unsafe code in user app

* update dependencies

* allow builds on riscv32imc

* let's fix QEMU

* Update .github/workflows/build.yml

Co-authored-by: Henrik Tjäder <henrik@tjaders.com>

* New build.rs

* removing test features

* adapt ui test to new version of clippy

* add more examples to RISC-V backend

* proper configuration of heapless for riscv32imc

* opt-out examples for riscv32imc

* point to new version of riscv-slic

* adapt new macro bindings

* adapt examples and CI to stable

* fix cortex-m CI

* Review

---------

Co-authored-by: Henrik Tjäder <henrik@tjaders.com>

1 files changed, 13 insertions, 4 deletions

diff --git a/rtic-macros/src/lib.rs b/rtic-macros/src/lib.rs
index 38eed8f..c464ab0 100644
--- a/rtic-macros/src/lib.rs
+++ b/rtic-macros/src/lib.rs
@@ -14,13 +14,14 @@ macro_rules! with_backend {
             feature = "cortex-m-source-masking",
             feature = "cortex-m-basepri",
             feature = "test-template",
-            feature = "riscv-esp32c3"
+            feature = "riscv-esp32c3",
+            feature = "riscv-slic",
         ))]
         $($tokens)*
     };
 }
 
-with_backend! { mod: [analyze, check, codegen, syntax] }
+with_backend! { mod: [analyze, check, codegen, preprocess, syntax] }
 with_backend! { use std::{fs, env, path::Path}; }
 with_backend! { use proc_macro::TokenStream; }
 
@@ -47,11 +48,18 @@ with_backend! {
     /// Should never panic, cargo feeds a path which is later converted to a string
     #[proc_macro_attribute]
     pub fn app(_args: TokenStream, _input: TokenStream) -> TokenStream {
-        let (app, analysis) = match syntax::parse(_args, _input) {
+        let (mut app, analysis) = match syntax::parse(_args, _input) {
             Err(e) => return e.to_compile_error().into(),
             Ok(x) => x,
         };
 
+        // Modify app based on backend before continuing
+        if let Err(e) = preprocess::app(&mut app, &analysis) {
+            return e.to_compile_error().into();
+        }
+        let app = app;
+        // App is not mutable after this point
+
         if let Err(e) = check::app(&app, &analysis) {
             return e.to_compile_error().into();
         }
@@ -109,6 +117,7 @@ with_backend! {
     feature = "cortex-m-source-masking",
     feature = "cortex-m-basepri",
     feature = "test-template",
-    feature = "riscv-esp32c3"
+    feature = "riscv-esp32c3",
+    feature = "riscv-slic",
 )))]
 compile_error!("Cannot compile. No backend feature selected.");