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47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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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/Types.h>
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#include <Kernel/Interrupts/GenericInterruptHandler.h>
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#include <Kernel/Time/HardwareTimer.h>
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namespace Kernel {
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class APICTimer final : public HardwareTimer<GenericInterruptHandler> {
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public:
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static APICTimer* initialize(u8, HardwareTimerBase&);
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virtual HardwareTimerType timer_type() const override { return HardwareTimerType::LocalAPICTimer; }
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virtual StringView model() const override { return "LocalAPIC"sv; }
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virtual size_t ticks_per_second() const override;
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virtual bool is_periodic() const override { return m_timer_mode == APIC::TimerMode::Periodic; }
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virtual bool is_periodic_capable() const override { return true; }
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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 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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void will_be_destroyed() override { HardwareTimer<GenericInterruptHandler>::will_be_destroyed(); }
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void enable_local_timer();
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void disable_local_timer();
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private:
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explicit APICTimer(u8, Function<void(RegisterState const&)>);
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bool calibrate(HardwareTimerBase&);
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u32 m_timer_period { 0 };
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APIC::TimerMode m_timer_mode { APIC::TimerMode::Periodic };
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};
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}
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