Kernel: Pull apart CPU.h

This does not add any functional changes

Kernel/Arch/x86/InterruptDisabler.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Types.h>
+
+#include <Kernel/IO.h>
+
+#include <Kernel/Arch/x86/ASM_wrapper.h>
+
+namespace Kernel {
+
+class InterruptDisabler {
+public:
+    InterruptDisabler()
+    {
+        m_flags = cpu_flags();
+        cli();
+    }
+
+    ~InterruptDisabler()
+    {
+        if (m_flags & 0x200)
+            sti();
+    }
+
+private:
+    u32 m_flags;
+};
+
+class NonMaskableInterruptDisabler {
+public:
+    NonMaskableInterruptDisabler()
+    {
+        IO::out8(0x70, IO::in8(0x70) | 0x80);
+    }
+
+    ~NonMaskableInterruptDisabler()
+    {
+        IO::out8(0x70, IO::in8(0x70) & 0x7F);
+    }
+};
+
+}