Update RedMulE tests to use interrupts

Author: Andrea Belano

target/snitch_cluster/sw/apps/redmule/data/data.h

@@ -70,6 +70,7 @@
 #define REDMULE_MCFG1_PTR 0x10
 #define REDMULE_ARITH_PTR 0x14
 
+#define HWPE_EVT_OFFS 0x94
 #define CK_GATE_OFFS 0x9C
 
 // OPs definition
@@ -138,6 +139,10 @@ static inline void hwpe_soft_clear() {
   HWPE_WRITE(0, REDMULE_SOFT_CLEAR);
 }
 
+static inline void hwpe_evt_clear(int value) {
+  HWPE_WRITE(value, HWPE_EVT_OFFS);
+}
+
 static inline void hwpe_cg_enable() { HWPE_WRITE(1, CK_GATE_OFFS); }
 
 static inline void hwpe_cg_disable() { HWPE_WRITE(0, CK_GATE_OFFS); }

target/snitch_cluster/sw/apps/redmule/src/redmule.c

@@ -67,7 +67,11 @@ int main() {
   snrt_cluster_hw_barrier();
 
   if (core_idx == 0) {
-    printf("Checking RedMulE from core %d\n", core_idx);
+    int status;
+    snrt_interrupt_enable(IRQ_M_HWPE);
+    while ((status = hwpe_get_status()) != 0) snrt_wfi();
+    hwpe_evt_clear(1 << core_idx);
+    snrt_interrupt_disable(IRQ_M_HWPE);
 
     // Disable RedMulE
     hwpe_cg_disable();