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55 lines
1.9 KiB
C++
55 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/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 NonnullRefPtr<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(const RegisterState&) 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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