mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-11 01:06:01 +03:00
b035267afa
If a hardware timer doesn't have a callback registered, it's now simply represented by a null m_callback.
68 lines
2.8 KiB
C++
68 lines
2.8 KiB
C++
/*
|
|
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Function.h>
|
|
#include <AK/Types.h>
|
|
#include <Kernel/Time/HPET.h>
|
|
#include <Kernel/Time/HardwareTimer.h>
|
|
|
|
namespace Kernel {
|
|
class HPETComparator final : public HardwareTimer {
|
|
friend class HPET;
|
|
|
|
public:
|
|
static NonnullRefPtr<HPETComparator> create(u8 number, u8 irq, bool periodic_capable);
|
|
|
|
virtual HardwareTimerType timer_type() const override { return HardwareTimerType::HighPrecisionEventTimer; }
|
|
virtual const char* model() const override { return "HPET"; }
|
|
|
|
u8 comparator_number() const { return m_comparator_number; }
|
|
|
|
virtual size_t ticks_per_second() const override;
|
|
|
|
virtual bool is_periodic() const override { return m_periodic; }
|
|
virtual bool is_periodic_capable() const override { return m_periodic_capable; }
|
|
virtual void set_periodic() override;
|
|
virtual void set_non_periodic() override;
|
|
|
|
virtual void reset_to_default_ticks_per_second() override;
|
|
virtual bool try_to_set_frequency(size_t frequency) override;
|
|
virtual bool is_capable_of_frequency(size_t frequency) const override;
|
|
virtual size_t calculate_nearest_possible_frequency(size_t frequency) const override;
|
|
|
|
private:
|
|
void set_new_countdown();
|
|
virtual void handle_irq(const RegisterState&) override;
|
|
HPETComparator(u8 number, u8 irq, bool periodic_capable);
|
|
bool m_periodic : 1;
|
|
bool m_periodic_capable : 1;
|
|
bool m_edge_triggered : 1;
|
|
u8 m_comparator_number { 0 };
|
|
};
|
|
}
|