kern: skeleton enough types to init KCoreLocalRegion in main()

libraries/libmesosphere/include/mesosphere/kern_k_hardware_timer_base.hpp

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/>.
+ */
+#pragma once
+#include <mesosphere/kern_k_spin_lock.hpp>
+#include <mesosphere/kern_k_interrupt_task.hpp>
+#include <mesosphere/kern_k_timer_task.hpp>
+#include <mesosphere/kern_select_interrupt_manager.hpp>
+
+namespace ams::kern {
+
+    class KHardwareTimerBase : public KInterruptTask {
+        private:
+            using TimerTaskTree = util::IntrusiveRedBlackTreeBaseTraits<KTimerTask>::TreeType<KTimerTask>;
+        private:
+            KSpinLock lock;
+            TimerTaskTree task_tree;
+            KTimerTask *next_task;
+        public:
+            constexpr KHardwareTimerBase() : lock(), task_tree(), next_task(nullptr) { /* ... */ }
+
+            virtual KInterruptTask *OnInterrupt(s32 interrupt_id) override { return this; }
+        protected:
+            KSpinLock &GetLock() { return this->lock; }
+
+            /* TODO: Actually implement more of KHardwareTimerBase */
+    };
+
+}