RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 16:07:47 +00:00
Code Issues Activity Actions

Kernel: Set up and calibrate APIC timer, and enable timer on all CPUs

Browse source 
This enables the APIC timer on all CPUs, which means Scheduler::timer_tick
is now called on all CPUs independently. We still don't do anything on
the APs as it instantly crashes due to a number of other problems.
This commit is contained in:
Tom 2020-10-25 09:13:47 -06:00 • committed by Andreas Kling
parent 9d347352a1
commit fe615e601a
14 changed files with 478 additions and 70 deletions
Download patch file Download diff file Expand all files Collapse all files

65
Kernel/Time/APICTimer.h Normal file
View file

@ -0,0 +1,65 @@
/*
* Copyright (c) 2020, the SerenityOS developers
* 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/NonnullRefPtr.h>
#include <AK/Types.h>
#include <Kernel/Interrupts/GenericInterruptHandler.h>
#include <Kernel/Time/HardwareTimer.h>
namespace Kernel {
class APICTimer final : public HardwareTimer<GenericInterruptHandler> {
public:
static APICTimer* initialize(u8, HardwareTimerBase&);
virtual HardwareTimerType timer_type() const override { return HardwareTimerType::LocalAPICTimer; }
virtual const char* model() const override { return "LocalAPIC"; }
virtual size_t ticks_per_second() const override;
virtual bool is_periodic() const override { return m_timer_mode == APIC::TimerMode::Periodic; }
virtual bool is_periodic_capable() const override { return true; }
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;
void enable_local_timer();
void disable_local_timer();
private:
explicit APICTimer(u8, Function<void(const RegisterState&)>);
bool calibrate(HardwareTimerBase&);
u32 m_timer_period { 0 };
APIC::TimerMode m_timer_mode { APIC::TimerMode::Periodic };
};
}