/* * Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il> * * SPDX-License-Identifier: BSD-2-Clause */ #pragma once #include <AK/Types.h> #include <Kernel/Devices/CharacterDevice.h> #include <Kernel/PhysicalAddress.h> namespace Kernel { class MemoryDevice final : public CharacterDevice { friend class DeviceManagement; public: static NonnullLockRefPtr<MemoryDevice> must_create(); ~MemoryDevice(); virtual ErrorOr<NonnullLockRefPtr<Memory::VMObject>> vmobject_for_mmap(Process&, Memory::VirtualRange const&, u64& offset, bool shared) override; private: MemoryDevice(); virtual StringView class_name() const override { return "MemoryDevice"sv; } virtual bool can_read(OpenFileDescription const&, u64) const override { return true; } virtual bool can_write(OpenFileDescription const&, u64) const override { return false; } virtual bool is_seekable() const override { return true; } virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override; virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override { return EINVAL; } }; }