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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.
50 lines
1.6 KiB
C++
50 lines
1.6 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/NonnullOwnPtr.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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#include <Kernel/Library/LockRefPtr.h>
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#include <Kernel/Locking/SpinlockProtected.h>
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namespace Kernel {
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class IRQHandler;
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class SharedIRQHandler final : public GenericInterruptHandler {
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public:
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static void initialize(u8 interrupt_number);
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virtual ~SharedIRQHandler();
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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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void enumerate_handlers(Function<void(GenericInterruptHandler&)>&);
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virtual size_t sharing_devices_count() const override
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{
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return m_handlers.with([](auto& list) { return list.size_slow(); });
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}
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virtual bool is_shared_handler() const override { return true; }
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virtual HandlerType type() const override { return HandlerType::SharedIRQHandler; }
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virtual StringView purpose() const override { return "Shared IRQ Handler"sv; }
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virtual StringView controller() const override { return m_responsible_irq_controller->model(); }
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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 SharedIRQHandler(u8 interrupt_number);
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bool m_enabled { true };
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SpinlockProtected<GenericInterruptHandler::List, LockRank::None> m_handlers;
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NonnullLockRefPtr<IRQController> m_responsible_irq_controller;
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};
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}
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