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Kernel: Add the PIC class

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This class inherits from IRQController class, and represents
the common Intel 8259 PIC chip.
This commit is contained in:
Liav A 2020-02-22 19:25:29 +02:00 • committed by Andreas Kling
parent b56afbea17
commit 7d59a67504
2 changed files with 266 additions and 0 deletions
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53
Kernel/Interrupts/PIC.h Normal file
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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* 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/Types.h>
#include <Kernel/Interrupts/IRQController.h>
namespace Kernel {
class PIC final : public IRQController {
public:
PIC();
virtual void enable(u8 number) override;
virtual void disable(u8 number) override;
virtual void hard_disable() override;
virtual void eoi(u8 number) const override;
virtual bool is_vector_enabled(u8 number) const override;
virtual u16 get_isr() const override;
virtual u16 get_irr() const override;
virtual u32 get_gsi_base() const override { return 0; }
virtual const char* model() const override { return "Dual Intel 8259"; }
virtual IRQControllerType type() const override { return IRQControllerType::i8259; }
private:
void remap(u8 offset);
void complete_eoi() const;
virtual void initialize() override;
};
}