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https://github.com/RGBCube/serenity
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The APICTimer, HPET and RTC (the RTC timer is in the context of the PC RTC here) are timers that exist only in x86 platforms, therefore, we move the handling code and the initialization code to the Arch/x86/Time directory. Other related code patterns in the TimeManagement singleton and in the Random.cpp file are guarded with #ifdef to ensure they are only compiled for x86 builds.
54 lines
1.9 KiB
C++
54 lines
1.9 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Function.h>
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#include <AK/Types.h>
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#include <Kernel/Arch/x86/Time/HPET.h>
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#include <Kernel/Time/HardwareTimer.h>
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namespace Kernel {
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class HPETComparator final : public HardwareTimer<IRQHandler> {
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friend class HPET;
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public:
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static NonnullLockRefPtr<HPETComparator> create(u8 number, u8 irq, bool periodic_capable, bool is_64bit_capable);
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virtual HardwareTimerType timer_type() const override { return HardwareTimerType::HighPrecisionEventTimer; }
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virtual StringView model() const override { return "HPET"sv; }
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u8 comparator_number() const { return m_comparator_number; }
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bool is_enabled() const { return m_enabled; }
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bool is_64bit_capable() const { return m_is_64bit_capable; }
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virtual size_t ticks_per_second() const override;
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virtual bool is_periodic() const override { return m_periodic; }
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virtual bool is_periodic_capable() const override { return m_periodic_capable; }
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virtual void set_periodic() override;
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virtual void set_non_periodic() override;
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virtual void disable() override;
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virtual bool can_query_raw() const override { return true; }
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virtual u64 current_raw() const override;
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virtual u64 raw_to_ns(u64) const override;
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virtual void reset_to_default_ticks_per_second() override;
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virtual bool try_to_set_frequency(size_t frequency) override;
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virtual bool is_capable_of_frequency(size_t frequency) const override;
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virtual size_t calculate_nearest_possible_frequency(size_t frequency) const override;
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private:
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void set_new_countdown();
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virtual bool handle_irq(RegisterState const&) override;
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HPETComparator(u8 number, u8 irq, bool periodic_capable, bool is_64bit_capable);
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bool m_periodic : 1;
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bool m_periodic_capable : 1;
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bool m_enabled : 1;
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bool m_is_64bit_capable : 1;
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u8 m_comparator_number { 0 };
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};
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}
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