riscv support

embassy-executor/Cargo.toml

@@ -25,6 +25,7 @@ flavors = [
 default = []
 std = ["embassy-macros/std", "critical-section/std"]
 wasm = ["dep:wasm-bindgen", "dep:js-sys", "embassy-macros/wasm"]
+riscv = ["embassy-macros/riscv"]
 
 # Enable nightly-only features
 nightly = []

embassy-executor/src/arch/riscv32.rs

@@ -54,20 +54,7 @@ impl Executor {
         loop {
             unsafe {
                 self.inner.poll();
-                // we do not care about race conditions between the load and store operations, interrupts
-                //will only set this value to true.
-                critical_section::with(|_| {
-                    // if there is work to do, loop back to polling
-                    // TODO can we relax this?
-                    if SIGNAL_WORK_THREAD_MODE.load(Ordering::SeqCst) {
-                        SIGNAL_WORK_THREAD_MODE.store(false, Ordering::SeqCst);
-                    }
-                    // if not, wait for interrupt
-                    else {
-                        core::arch::asm!("wfi");
-                    }
-                });
-                // if an interrupt occurred while waiting, it will be serviced here
+                core::arch::asm!("wfi");
             }
         }
     }