Kernel: Add simple implementation for InterruptManagement on aarch64

This class currently hardcodes the use of the Raspberry Pi interrupt
controller.

Kernel/Arch/aarch64/InterruptManagement.cpp

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
+ * Copyright (c) 2022, Timon Kruiper <timonkruiper@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <Kernel/Arch/aarch64/InterruptManagement.h>
+#include <Kernel/Arch/aarch64/RPi/InterruptController.h>
+
+namespace Kernel {
+
+static InterruptManagement* s_interrupt_management;
+
+bool InterruptManagement::initialized()
+{
+    return s_interrupt_management != nullptr;
+}
+
+InterruptManagement& InterruptManagement::the()
+{
+    VERIFY(InterruptManagement::initialized());
+    return *s_interrupt_management;
+}
+
+void InterruptManagement::initialize()
+{
+    VERIFY(!InterruptManagement::initialized());
+    s_interrupt_management = new InterruptManagement;
+
+    the().find_controllers();
+}
+
+void InterruptManagement::find_controllers()
+{
+    // TODO: Once device tree support is in place, find interrupt controllers using that.
+    m_interrupt_controllers.append(new RPi::InterruptController);
+}
+
+u8 InterruptManagement::acquire_mapped_interrupt_number(u8 interrupt_number)
+{
+    return interrupt_number;
+}
+
+Vector<RefPtr<IRQController>> const& InterruptManagement::controllers()
+{
+    return m_interrupt_controllers;
+}
+
+RefPtr<IRQController> InterruptManagement::get_responsible_irq_controller(u8)
+{
+    // TODO: Support more interrupt controllers
+    VERIFY(m_interrupt_controllers.size() == 1);
+    return m_interrupt_controllers[0];
+}
+
+}