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

exosphere/rebootstub/src/timer.h

@@ -0,0 +1,33 @@
+/*
+ * 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/>.
+ */
+ 
+#ifndef EXOSPHERE_REBOOTSTUB_TIMER_H
+#define EXOSPHERE_REBOOTSTUB_TIMER_H
+
+#include "utils.h"
+
+#define TIMERUS_CNTR_1US_0 MAKE_REG32(0x60005010)
+
+static inline void timer_wait(uint32_t microseconds) {
+    uint32_t old_time = TIMERUS_CNTR_1US_0;
+    while (TIMERUS_CNTR_1US_0 - old_time <= microseconds) {
+        /* Spin-lock. */
+    }
+}
+
+void spinlock_wait(uint32_t count);
+
+#endif