exo2: implement through boot config load/validate

libraries/libexosphere/include/exosphere/pkg1/pkg1_api.hpp

@@ -0,0 +1,25 @@
+/*
+ * 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 <vapours.hpp>
+
+namespace ams::pkg1 {
+
+    bool IsProduction();
+    bool IsProductionForVersionCheck();
+    bool IsProductionForPublicKey();
+
+}

libraries/libexosphere/include/exosphere/pkg1/pkg1_boot_config.hpp

@@ -90,9 +90,13 @@ namespace ams::pkg1 {
             return static_cast<MemoryMode>(this->flags0[3]);
         }
 
-        bool IsTscInitialValueValid() const {
+        constexpr bool IsInitialTscValueValid() const {
             return (this->flags0[4] & (1 << 0)) != 0;
         }
+
+        constexpr u64 GetInitialTscValue() const {
+            return this->IsInitialTscValueValid() ? this->initial_tsc_value : 0;
+        }
     };
     static_assert(util::is_pod<BootConfigData>::value);
     static_assert(sizeof(BootConfigData) == 0x200);