RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-28 02:07:35 +00:00
Code Issues Activity Actions

Kernel: Reorganize Arch/x86 directory to Arch/x86_64 after i686 removal

Browse source 
No functional change.
This commit is contained in:
Liav A 2022-10-04 13:46:11 +03:00 • committed by Andreas Kling
parent 5ff318cf3a
commit 91db482ad3
129 changed files with 482 additions and 1116 deletions
Download patch file Download diff file Expand all files Collapse all files

57
Kernel/Arch/x86_64/Time/PIT.h Normal file
View file

@ -0,0 +1,57 @@
/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Types.h>
#include <Kernel/Library/NonnullLockRefPtr.h>
#include <Kernel/Time/HardwareTimer.h>
namespace Kernel {
/* Timer related ports */
#define TIMER0_CTL 0x40
#define TIMER1_CTL 0x41
#define TIMER2_CTL 0x42
#define PIT_CTL 0x43
/* Building blocks for PIT_CTL */
#define TIMER0_SELECT 0x00
#define TIMER1_SELECT 0x40
#define TIMER2_SELECT 0x80
#define MODE_COUNTDOWN 0x00
#define MODE_ONESHOT 0x02
#define MODE_RATE 0x04
#define MODE_SQUARE_WAVE 0x06
#define WRITE_WORD 0x30
#define BASE_FREQUENCY 1193182
class PIT final : public HardwareTimer<IRQHandler> {
public:
static NonnullLockRefPtr<PIT> initialize(Function<void(RegisterState const&)>);
virtual HardwareTimerType timer_type() const override { return HardwareTimerType::i8253; }
virtual StringView model() const override { return "i8254"sv; }
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 true; }
virtual void set_periodic() override;
virtual void set_non_periodic() override;
virtual void disable() 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:
explicit PIT(Function<void(RegisterState const&)>);
bool m_periodic { true };
};
}