boot: implement voltage change

stratosphere/boot/source/boot_functions.hpp

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2018-2019 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 <switch.h>
+#include <stratosphere.hpp>
+
+class Boot {
+    public:
+        /* Functions for actually booting. */
+        static void ChangeGpioVoltageTo1_8v();
+
+        /* Register Utilities. */
+        static u32 ReadPmcRegister(u32 phys_addr);
+        static void WritePmcRegister(u32 phys_addr, u32 value, u32 mask = UINT32_MAX);
+};