bench1: Set power_off_reason.

benchmark/bench1.cpp

@@ -30,6 +30,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #if defined(PPC_BENCHMARKS)
 void ppc_exception_handler(Except_Type exception_type, uint32_t srr1_bits) {
     power_on = false;
+    power_off_reason = po_benchmark_exception;
 }
 #endif
 

cpu/ppc/ppcemu.h

@@ -317,6 +317,7 @@ enum Po_Cause : int {
     po_enter_debugger,
     po_entered_debugger,
     po_signal_interrupt,
+    po_benchmark_exception
 };
 
 extern bool power_on;