exo/bpc.mitm: Add support for proper shutdown.

exosphere/rebootstub/src/shutdown.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+ 
+#include "utils.h"
+#include "i2c.h"
+#include "timer.h"
+
+void do_shutdown(void) {
+    /* Initialize i2c. */
+    i2c_init();
+    
+    /* Stop alarm, shutdown. */
+    i2c_stop_rtc_alarm();
+    i2c_send_shutdown_cmd();
+    
+    while (true) { }
+}