Initial support for CLIC (#1112)

* Initial support for CLIC

* CHANGELOG.md entry

* Explain MCAUSE CSR for CLIC

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add initial support for the ESP32-P4 (#1101)
 - Implement `embedded_hal::pwm::SetDutyCycle` trait for `ledc::channel::Channel` (#1097) 
 - ESP32-P4: Add initial GPIO support (#1109)
+- ESP32-P4: Add initial support for interrupts (#1112)
 
 ### Fixed
 

esp-hal-common/build.rs

@@ -45,7 +45,7 @@ macro_rules! assert_unique_used_features {
     }
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, PartialEq)]
 enum Arch {
     #[serde(rename = "riscv")]
     RiscV,
@@ -177,6 +177,14 @@ fn main() -> Result<(), Box<dyn Error>> {
         panic!("The target does not support PSRAM");
     }
 
+    // Don't support "interrupt-preemption" and "direct-vectoring" on Xtensa and
+    // RISCV-clic
+    if (*&device.symbols.contains(&String::from("clic")) || device.arch == Arch::Xtensa)
+        && (cfg!(feature = "direct-vectoring") || cfg!(feature = "interrupt-preemption"))
+    {
+        panic!("The target does not support interrupt-preemption and direct-vectoring");
+    }
+
     // Define all necessary configuration symbols for the configured device:
     println!("cargo:rustc-cfg={}", device_name);
     println!("cargo:rustc-cfg={}", device.arch);

esp-hal-common/devices/esp32p4/device.toml

@@ -92,5 +92,6 @@ peripherals = [
 
 symbols = [
     # Additional peripherals defined by us (the developers):
-    "plic",
+    "clic",
+    "very_large_intr_status",
 ]