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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.
60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
/*
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* Copyright (c) 2021-2022, 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 <Kernel/Devices/Device.h>
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#include <Kernel/Devices/Storage/AHCI/Controller.h>
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#include <Kernel/Devices/Storage/AHCI/Port.h>
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#include <Kernel/Devices/Storage/StorageDevice.h>
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#include <Kernel/Interrupts/PCIIRQHandler.h>
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#include <Kernel/Library/LockRefPtr.h>
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#include <Kernel/Locking/Mutex.h>
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#include <Kernel/Memory/PhysicalAddress.h>
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#include <Kernel/Memory/PhysicalRAMPage.h>
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#include <Kernel/Sections.h>
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#include <Kernel/Security/Random.h>
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#include <Kernel/Tasks/WaitQueue.h>
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namespace Kernel {
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class AsyncBlockDeviceRequest;
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class AHCIController;
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class AHCIPort;
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class AHCIInterruptHandler final : public PCI::IRQHandler {
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friend class AHCIController;
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public:
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static ErrorOr<NonnullOwnPtr<AHCIInterruptHandler>> create(AHCIController&, u8 irq, AHCI::MaskedBitField taken_ports);
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virtual ~AHCIInterruptHandler() override;
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virtual StringView purpose() const override { return "SATA IRQ Handler"sv; }
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bool is_responsible_for_port_index(u32 port_index) const { return m_taken_ports.is_set_at(port_index); }
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private:
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AHCIInterruptHandler(AHCIController&, u8 irq, AHCI::MaskedBitField taken_ports);
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void allocate_resources_and_initialize_ports();
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//^ IRQHandler
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virtual bool handle_irq() override;
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enum class Direction : u8 {
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Read,
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Write,
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};
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AHCI::MaskedBitField create_pending_ports_interrupts_bitfield() const;
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// Data members
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NonnullLockRefPtr<AHCIController> m_parent_controller;
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AHCI::MaskedBitField m_taken_ports;
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AHCI::MaskedBitField m_pending_ports_interrupts;
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};
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}
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