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34 lines
931 B
C++
34 lines
931 B
C++
/*
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* Copyright (c) 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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#include <AK/StringView.h>
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#include <Kernel/FileSystem/OpenFileDescription.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/Firmware/BIOS/Component.h>
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#include <Kernel/Firmware/BIOS.h>
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#include <Kernel/KBufferBuilder.h>
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#include <Kernel/Memory/MemoryManager.h>
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#include <Kernel/Memory/TypedMapping.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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UNMAP_AFTER_INIT BIOSSysFSComponent::BIOSSysFSComponent()
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{
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}
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ErrorOr<size_t> BIOSSysFSComponent::read_bytes(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription*) const
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{
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auto blob = TRY(try_to_generate_buffer());
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if ((size_t)offset >= blob->size())
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return 0;
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ssize_t nread = min(static_cast<off_t>(blob->size() - offset), static_cast<off_t>(count));
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TRY(buffer.write(blob->data() + offset, nread));
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return nread;
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}
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}
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