Atmosphere/stratosphere/fatal/source/fatal_task_clock.cpp

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/*
* Copyright (c) Atmosphère-NX
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*
* 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 <stratosphere.hpp>
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#include "fatal_task_clock.hpp"
namespace ams::fatal::srv {
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namespace {
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/* Task definition. */
class AdjustClockTask : public ITaskWithDefaultStack {
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private:
Result AdjustClockForModule(PcvModule module, u32 hz);
Result AdjustClock();
public:
virtual Result Run() override;
virtual const char *GetName() const override {
return "AdjustClockTask";
}
};
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/* Task global. */
AdjustClockTask g_adjust_clock_task;
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/* Task implementation. */
Result AdjustClockTask::AdjustClockForModule(PcvModule module, u32 hz) {
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if (hos::GetVersion() >= hos::Version_8_0_0) {
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/* On 8.0.0+, convert to module id + use clkrst API. */
PcvModuleId module_id;
R_TRY(pcvGetModuleId(std::addressof(module_id), module));
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ClkrstSession session;
R_TRY(clkrstOpenSession(std::addressof(session), module_id, 3));
ON_SCOPE_EXIT { clkrstCloseSession(std::addressof(session)); };
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R_TRY(clkrstSetClockRate(std::addressof(session), hz));
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} else {
/* On 1.0.0-7.0.1, use pcv API. */
R_TRY(pcvSetClockRate(module, hz));
}
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R_SUCCEED();
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}
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;
R_TRY(AdjustClockForModule(PcvModule_CpuBus, CPU_CLOCK_1020MHZ));
R_TRY(AdjustClockForModule(PcvModule_GPU, GPU_CLOCK_307MHZ));
R_TRY(AdjustClockForModule(PcvModule_EMC, EMC_CLOCK_1331MHZ));
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R_SUCCEED();
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}
Result AdjustClockTask::Run() {
R_RETURN(AdjustClock());
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}
}
ITask *GetAdjustClockTask(const ThrowContext *ctx) {
g_adjust_clock_task.Initialize(ctx);
return std::addressof(g_adjust_clock_task);
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}
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}