1 files changed, 21 insertions, 0 deletions
diff --git a/arm9/lib/src/OS_protectionUnit.c b/arm9/lib/src/OS_protectionUnit.c
new file mode 100644
index 00000000..be57dcd6
--- /dev/null
+++ b/arm9/lib/src/OS_protectionUnit.c
@@ -0,0 +1,21 @@
+//
+// Created by red031000 on 2020-05-24.
+//
+
+#include "function_target.h"
+
+ARM_FUNC asm void OS_EnableProtectionUnit(void)
+{
+    mrc p15, 0x0, r0, c1, c0, 0x0
+    orr r0, r0, #0x1
+    mcr p15, 0x0, r0, c1, c0, 0x0
+    bx lr
+}
+
+ARM_FUNC asm void OS_DisableProtectionUnit(void)
+{
+    mrc p15, 0x0, r0, c1, c0, 0x0
+    bic r0, r0, #0x1
+    mcr p15, 0x0, r0, c1, c0, 0x0
+    bx lr
+}