fatal: Implement AdjustClockTask

stratosphere/fatal/source/fatal_main.cpp

@@ -77,6 +77,11 @@ void __appInit(void) {
         std::abort();
     }
     
+    rc = pcvInitialize();
+    if (R_FAILED(rc)) {
+        std::abort();
+    }
+    
     rc = psmInitialize();
     if (R_FAILED(rc)) {
         std::abort();
@@ -94,6 +99,7 @@ void __appExit(void) {
     /* Cleanup services. */
     spsmExit();
     psmExit();
+    pcvExit();
     bpcExit();
     pminfoExit();
     setsysExit();

stratosphere/fatal/source/fatal_task.cpp

@@ -19,6 +19,7 @@
 #include "fatal_task.hpp"
 
 #include "fatal_task_error_report.hpp"
+#include "fatal_task_clock.hpp"
 #include "fatal_task_power.hpp"
 
 
@@ -56,7 +57,7 @@ void RunFatalTasks(FatalContext *ctx, u64 title_id, bool error_report, Event *er
     /* TODO: RunTask(new ShowFatalTask(ctx, title_id, battery_event)); */
     /* TODO: RunTask(new StopSoundTask(ctx, title_id)); */
     /* TODO: RunTask(new BacklightControlTask(ctx, title_id)); */
-    /* TODO: RunTask(new AdjustClockTask(ctx, title_id)); */
+    RunTask(new AdjustClockTask(ctx, title_id));
     RunTask(new PowerButtonObserveTask(ctx, title_id, erpt_event));
     RunTask(new StateTransitionStopTask(ctx, title_id));
 }

stratosphere/fatal/source/fatal_task_clock.cpp

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2018 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/>.
+ */
+ 
+#include <switch.h>
+#include "fatal_task_clock.hpp"
+
+
+Result AdjustClockTask::AdjustClock() {
+    /* Fatal sets the CPU to 1020MHz, the GPU to 307 MHz, and the EMC to 1331MHz. */
+    constexpr u32 CPU_CLOCK_1020MHZ = 0x3CCBF700L;
+    constexpr u32 GPU_CLOCK_307MHZ = 0x124F8000L;
+    constexpr u32 EMC_CLOCK_1331MHZ = 0x4F588000L;
+    Result rc = 0;
+    
+    if (R_FAILED((rc = pcvSetClockRate(PcvModule_Cpu, CPU_CLOCK_1020MHZ)))) {
+        return rc;
+    }
+    
+    if (R_FAILED((rc = pcvSetClockRate(PcvModule_Gpu, GPU_CLOCK_307MHZ)))) {
+        return rc;
+    }
+    
+    if (R_FAILED((rc = pcvSetClockRate(PcvModule_Emc, EMC_CLOCK_1331MHZ)))) {
+        return rc;
+    }
+    
+    return rc;
+}
+
+Result AdjustClockTask::Run() {
+    return AdjustClock();
+}

stratosphere/fatal/source/fatal_task_clock.hpp

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2018 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>
+#include "fatal_task.hpp"
+
+class AdjustClockTask : public IFatalTask {
+    private:
+        Result AdjustClock();
+    public:
+        AdjustClockTask(FatalContext *ctx, u64 title_id) : IFatalTask(ctx, title_id) { }
+        virtual Result Run() override;
+        virtual const char *GetName() const override {
+            return "AdjustClockTask";
+        }
+};