diff --git a/include/arm11/spinlock.h b/include/arm11/spinlock.h
new file mode 100644
index 0000000..8aa9e2f
--- /dev/null
+++ b/include/arm11/spinlock.h
@@ -0,0 +1,48 @@
+#pragma once
+
+/*
+ *   This file is part of fastboot 3DS
+ *   Copyright (C) 2017 derrek, profi200
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that 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 "types.h"
+
+
+
+static inline void spinlockLock(u32 *lock)
+{
+	u32 tmp;
+	__asm__ __volatile__("1: ldrex %0, [%1]\n"
+	                     "   strex %0, %2, [%1]\n"
+	                     "   teq %0, #0\n"
+	                     "   wfene\n"
+	                     "   bne 1b\n"
+	                     "   mcr p15, 0, %0, c7, c10, 5"
+	                     : "=&r" (tmp)
+	                     : "r" (lock), "r" (1)
+	                     : "cc", "memory");
+}
+
+static inline void spinlockUnlock(u32 *lock)
+{
+	__asm__ __volatile__("mcr p15, 0, %0, c7, c10, 5\n" // DMB
+	                     "str %0, [%1]\n"
+	                     "mcr p15, 0, %0, c7, c10, 4\n" // DSB
+	                     "sev"
+	                     :
+	                     : "r" (0), "r" (lock)
+	                     : "memory");
+}