adds trap handler

port/moonlight/trap_non_vectored.c

@@ -1,4 +1,5 @@
 #include "hwtimer.h"
+#include "platform.h"
 #include "riscv-traps.h"
 #include <stdint.h>
 #include <stdio.h>
@@ -39,6 +40,11 @@ void trap_handler(uintptr_t mcause, uintptr_t mepc, uintptr_t mtval) {
                 hwtimer_handler();
                 _tx_timer_interrupt();
                 break;
+#ifdef TX_THREAD_SMP_INTER_CORE_INTERRUPT
+            case RISCV_INT_MSI:
+                set_aclint_msip(aclint, csr_read_mhartid(), 0);
+                break;
+#endif
             case RISCV_INT_MEI:
                 puts("[INTERRUPT]: handler ext irq error!\n");
                 while(1)