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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().
39 lines
903 B
C++
39 lines
903 B
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/RefPtr.h>
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#include <Kernel/Bus/PCI/Access.h>
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#include <Kernel/Bus/PCI/Device.h>
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#include <Kernel/Devices/Device.h>
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#include <Kernel/Locking/Mutex.h>
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#include <Kernel/Memory/PhysicalPage.h>
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#include <Kernel/PhysicalAddress.h>
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#include <Kernel/Random.h>
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#include <Kernel/WaitQueue.h>
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namespace Kernel {
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class AsyncBlockDeviceRequest;
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class StorageDevice;
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class StorageController : public RefCounted<StorageController> {
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public:
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virtual ~StorageController() = default;
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virtual RefPtr<StorageDevice> device(u32 index) const = 0;
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virtual size_t devices_count() const = 0;
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protected:
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virtual bool reset() = 0;
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virtual bool shutdown() = 0;
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virtual void complete_current_request(AsyncDeviceRequest::RequestResult) = 0;
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};
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}
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