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https://github.com/SerenityOS/serenity
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0482f4e117
Linux did the same thing 18 years ago and their reasons for the change are similar to ours - https://github.com/torvalds/linux/commit/7d12e78 Most interrupt handlers (i.e. IRQ handlers) never used the register state reference anywhere so there's simply no need of passing it around. I didn't measure the performance boost but surely this change can't make things worse anyway.
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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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/OwnPtr.h>
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#include <AK/Types.h>
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#include <Kernel/Arch/IRQController.h>
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#include <Kernel/Interrupts/GenericInterruptHandler.h>
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namespace Kernel {
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class SpuriousInterruptHandler final : public GenericInterruptHandler {
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public:
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static void initialize(u8 interrupt_number);
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static void initialize_for_disabled_master_pic();
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static void initialize_for_disabled_slave_pic();
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virtual ~SpuriousInterruptHandler();
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virtual bool handle_interrupt() override;
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void register_handler(GenericInterruptHandler&);
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void unregister_handler(GenericInterruptHandler&);
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virtual bool eoi() override;
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virtual size_t sharing_devices_count() const override { return 1; }
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virtual bool is_shared_handler() const override { return false; }
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virtual HandlerType type() const override { return HandlerType::SpuriousInterruptHandler; }
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virtual StringView purpose() const override;
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virtual StringView controller() const override;
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void enable_interrupt_vector_for_disabled_pic();
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private:
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void enable_interrupt_vector();
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void disable_interrupt_vector();
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explicit SpuriousInterruptHandler(u8 interrupt_number);
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bool m_enabled { false };
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bool m_real_irq { false };
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NonnullLockRefPtr<IRQController> m_responsible_irq_controller;
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OwnPtr<GenericInterruptHandler> m_real_handler;
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};
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}
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