Added Rosalina, see details

- see release notes
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sysmodules/rosalina/source/menus/n3ds.c

@@ -0,0 +1,74 @@
+/*
+*   This file is part of Luma3DS
+*   Copyright (C) 2016-2017 Aurora Wright, TuxSH
+*
+*   This program is free software: you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation, either version 3 of the License, or
+*   (at your option) any later version.
+*
+*   This program is distributed in the hope that 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/>.
+*
+*   Additional Terms 7.b and 7.c of GPLv3 apply to this file:
+*       * Requiring preservation of specified reasonable legal notices or
+*         author attributions in that material or in the Appropriate Legal
+*         Notices displayed by works containing it.
+*       * Prohibiting misrepresentation of the origin of that material,
+*         or requiring that modified versions of such material be marked in
+*         reasonable ways as different from the original version.
+*/
+
+#include <3ds.h>
+#include "fmt.h"
+#include "menus/n3ds.h"
+#include "memory.h"
+#include "menu.h"
+
+static char clkRateBuf[128 + 1];
+
+Menu N3DSMenu = {
+    "New 3DS menu",
+    .nbItems = 2,
+    {
+        { "Enable L2 cache", METHOD, .method = &N3DSMenu_EnableDisableL2Cache },
+        { clkRateBuf, METHOD, .method = &N3DSMenu_ChangeClockRate }
+    }
+};
+
+static s64 clkRate = 0, higherClkRate = 0, L2CacheEnabled = 0;
+
+void N3DSMenu_UpdateStatus(void)
+{
+    svcGetSystemInfo(&clkRate, 0x10001, 0);
+    svcGetSystemInfo(&higherClkRate, 0x10001, 1);
+    svcGetSystemInfo(&L2CacheEnabled, 0x10001, 2);
+
+    N3DSMenu.items[0].title = L2CacheEnabled ? "Disable L2 cache" : "Enable L2 cache";
+    sprintf(clkRateBuf, "Set clock rate to %uMHz", clkRate != 268 ? 268 : (u32)higherClkRate);
+}
+
+void N3DSMenu_ChangeClockRate(void)
+{
+    N3DSMenu_UpdateStatus();
+
+    s64 newBitMask = (L2CacheEnabled << 1) | ((clkRate != 268 ? 1 : 0) ^ 1);
+    svcKernelSetState(10, (u32)newBitMask);
+
+    N3DSMenu_UpdateStatus();
+}
+
+void N3DSMenu_EnableDisableL2Cache(void)
+{
+    N3DSMenu_UpdateStatus();
+
+    s64 newBitMask = ((L2CacheEnabled ^ 1) << 1) | (clkRate != 268 ? 1 : 0);
+    svcKernelSetState(10, (u32)newBitMask);
+
+    N3DSMenu_UpdateStatus();
+}