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https://github.com/RGBCube/serenity
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ac7ce12123
This was a premature optimization from the early days of SerenityOS. The eternal heap was a simple bump pointer allocator over a static byte array. My original idea was to avoid heap fragmentation and improve data locality, but both ideas were rooted in cargo culting, not data. We would reserve 4 MiB at boot and only ended up using ~256 KiB, wasting the rest. This patch replaces all kmalloc_eternal() usage by regular kmalloc().
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/*
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* Copyright (c) 2021, 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/RefPtr.h>
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#include <AK/Types.h>
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#include <Kernel/Sections.h>
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#include <Kernel/Storage/ATA/AHCI.h>
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#include <Kernel/Storage/ATA/ATAController.h>
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#include <Kernel/Storage/StorageDevice.h>
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namespace Kernel {
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class AsyncBlockDeviceRequest;
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class AHCIPortHandler;
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class AHCIPort;
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class AHCIController final : public ATAController
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, public PCI::Device {
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friend class AHCIPortHandler;
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friend class AHCIPort;
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public:
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UNMAP_AFTER_INIT static NonnullRefPtr<AHCIController> initialize(PCI::DeviceIdentifier const& pci_device_identifier);
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virtual ~AHCIController() override;
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virtual RefPtr<StorageDevice> device(u32 index) const override;
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virtual bool reset() override;
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virtual bool shutdown() override;
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virtual size_t devices_count() const override;
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virtual void start_request(const ATADevice&, AsyncBlockDeviceRequest&) override;
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virtual void complete_current_request(AsyncDeviceRequest::RequestResult) override;
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const AHCI::HBADefinedCapabilities& hba_capabilities() const { return m_capabilities; };
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private:
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void disable_global_interrupts() const;
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void enable_global_interrupts() const;
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UNMAP_AFTER_INIT explicit AHCIController(PCI::DeviceIdentifier const&);
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UNMAP_AFTER_INIT void initialize_hba(PCI::DeviceIdentifier const&);
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AHCI::HBADefinedCapabilities capabilities() const;
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RefPtr<StorageDevice> device_by_port(u32 index) const;
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volatile AHCI::PortRegisters& port(size_t port_number) const;
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UNMAP_AFTER_INIT NonnullOwnPtr<Memory::Region> default_hba_region() const;
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volatile AHCI::HBA& hba() const;
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NonnullOwnPtr<Memory::Region> m_hba_region;
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AHCI::HBADefinedCapabilities m_capabilities;
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NonnullRefPtrVector<AHCIPortHandler> m_handlers;
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};
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}
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