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2c85f65519
These are constants, they don't need to be dynamically allocated. Another minor step towards removing `AK::String` from the Kernel and improving OOM safety.
119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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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/RefPtr.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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#include <Kernel/FileSystem/SysFS.h>
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#include <Kernel/Firmware/SysFSFirmware.h>
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#include <Kernel/KBuffer.h>
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#include <Kernel/Memory/MappedROM.h>
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#include <Kernel/Memory/Region.h>
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#include <Kernel/PhysicalAddress.h>
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#include <Kernel/VirtualAddress.h>
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namespace Kernel::SMBIOS {
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struct [[gnu::packed]] LegacyEntryPoint32bit {
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char legacy_sig[5];
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u8 checksum2;
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u16 smboios_table_length;
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u32 smbios_table_ptr;
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u16 smbios_tables_count;
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u8 smbios_bcd_revision;
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};
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struct [[gnu::packed]] EntryPoint32bit {
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char sig[4];
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u8 checksum;
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u8 length;
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u8 major_version;
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u8 minor_version;
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u16 maximum_structure_size;
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u8 implementation_revision;
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char formatted_area[5];
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LegacyEntryPoint32bit legacy_structure;
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};
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struct [[gnu::packed]] EntryPoint64bit {
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char sig[5];
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u8 checksum;
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u8 length;
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u8 major_version;
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u8 minor_version;
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u8 document_revision;
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u8 revision;
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u8 reserved;
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u32 table_maximum_size;
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u64 table_ptr;
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};
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}
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namespace Kernel {
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Memory::MappedROM map_bios();
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Memory::MappedROM map_ebda();
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class BIOSSysFSComponent : public SysFSComponent {
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public:
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virtual KResultOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
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protected:
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virtual KResultOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const = 0;
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explicit BIOSSysFSComponent(StringView name);
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};
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class DMIEntryPointExposedBlob : public BIOSSysFSComponent {
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public:
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static NonnullRefPtr<DMIEntryPointExposedBlob> create(PhysicalAddress dmi_entry_point, size_t blob_size);
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private:
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DMIEntryPointExposedBlob(PhysicalAddress dmi_entry_point, size_t blob_size);
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virtual KResultOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const override;
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PhysicalAddress m_dmi_entry_point;
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size_t m_dmi_entry_point_length;
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};
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class SMBIOSExposedTable : public BIOSSysFSComponent {
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public:
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static NonnullRefPtr<SMBIOSExposedTable> create(PhysicalAddress, size_t blob_size);
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private:
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SMBIOSExposedTable(PhysicalAddress dmi_entry_point, size_t blob_size);
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virtual KResultOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const override;
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PhysicalAddress m_smbios_structure_table;
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size_t m_smbios_structure_table_length;
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};
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class BIOSSysFSDirectory : public SysFSDirectory {
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public:
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static KResultOr<NonnullRefPtr<BIOSSysFSDirectory>> try_create(FirmwareSysFSDirectory&);
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void create_components();
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private:
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explicit BIOSSysFSDirectory(FirmwareSysFSDirectory&);
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void set_dmi_64_bit_entry_initialization_values();
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void set_dmi_32_bit_entry_initialization_values();
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void initialize_dmi_exposer();
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Optional<PhysicalAddress> find_dmi_entry64bit_point();
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Optional<PhysicalAddress> find_dmi_entry32bit_point();
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PhysicalAddress m_dmi_entry_point;
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PhysicalAddress m_smbios_structure_table;
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bool m_using_64bit_dmi_entry_point { false };
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size_t m_smbios_structure_table_length { 0 };
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size_t m_dmi_entry_point_length { 0 };
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};
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}
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