|
@@ -0,0 +1,28 @@
|
|
|
|
+/*
|
|
|
|
+ * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
|
|
|
|
+ *
|
|
|
|
+ * SPDX-License-Identifier: BSD-2-Clause
|
|
|
|
+ */
|
|
|
|
+
|
|
|
|
+#pragma once
|
|
|
|
+
|
|
|
|
+#include <AK/Types.h>
|
|
|
|
+
|
|
|
|
+#include <Kernel/Arch/x86/IO.h>
|
|
|
|
+
|
|
|
|
+namespace Kernel {
|
|
|
|
+
|
|
|
|
+class NonMaskableInterruptDisabler {
|
|
|
|
+public:
|
|
|
|
+ NonMaskableInterruptDisabler()
|
|
|
|
+ {
|
|
|
|
+ IO::out8(0x70, IO::in8(0x70) | 0x80);
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ ~NonMaskableInterruptDisabler()
|
|
|
|
+ {
|
|
|
|
+ IO::out8(0x70, IO::in8(0x70) & 0x7F);
|
|
|
|
+ }
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+}
|