mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2025-12-12 20:25:16 +01:00
104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
/*
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* Copyright (c) 2019-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "defines.hpp"
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#include "hvisor_i_interrupt_task.hpp"
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#include "cpu/hvisor_cpu_sysreg_general.hpp"
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#include "preprocessor.h"
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#include "platform/interrupt_config.h"
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#include <chrono>
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namespace ams::hvisor {
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class GenericTimer final : public IInterruptTask {
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SINGLETON(GenericTimer);
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private:
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static constexpr u32 irqId = GIC_IRQID_NS_PHYS_HYP_TIMER;
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private:
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static void Configure(bool enabled, bool interruptMasked)
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{
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u64 ebit = enabled ? cpu::CNTCTL_ENABLE : 0;
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u64 mbit = interruptMasked ? cpu::CNTCTL_IMASK: 0;
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THERMOSPHERE_SET_SYSREG(cnthp_ctl_el2, mbit | ebit);
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}
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static bool GetInterruptStatus()
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{
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return (THERMOSPHERE_GET_SYSREG(cnthp_ctl_el2) & cpu::CNTCTL_ISTATUS) != 0;
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}
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private:
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u64 m_timerFreq = 0;
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private:
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constexpr GenericTimer() = default;
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public:
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static s64 GetSystemTick()
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{
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return static_cast<s64>(THERMOSPHERE_GET_SYSREG(cntpct_el0));
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}
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static void SetTimeoutTicks(s64 ticks)
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{
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THERMOSPHERE_SET_SYSREG(cnthp_cval_el2, GetSystemTick() + ticks);
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Configure(true, false);
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}
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static void WaitTicks(s64 ticks);
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public:
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void Initialize();
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std::optional<bool> InterruptTopHalfHandler(u32 irqId, u32) final;
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constexpr u64 GetTimerFrequency() const { return m_timerFreq; }
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template<typename SecondRatio = std::ratio<1>>
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auto GetSystemTime() const
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{
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auto tick = GetSystemTick();
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return (tick * SecondRatio::den) / (m_timerFreq * SecondRatio::num);
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}
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std::chrono::nanoseconds GetSystemTimeNs() const
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{
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return std::chrono::nanoseconds{GetSystemTime<std::nano>()};
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}
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template<typename Duration>
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void SetTimeout(Duration d) const
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{
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using SecondRatio = typename Duration::period;
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auto v = (d.count() * m_timerFreq * SecondRatio::num) / SecondRatio::den;
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SetTimeoutTicks(v);
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}
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template<typename Duration>
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void Wait(Duration d) const
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{
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using SecondRatio = typename Duration::period;
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auto v = (d.count() * m_timerFreq * SecondRatio::num) / SecondRatio::den;
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WaitTicks(v);
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}
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};
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}
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