mirror of
https://github.com/SerenityOS/serenity
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108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/SinglyLinkedList.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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#include <Kernel/KBuffer.h>
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#include <Kernel/PhysicalAddress.h>
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#include <Kernel/VM/Region.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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class DMIExpose {
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public:
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static void initialize();
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DMIExpose();
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static DMIExpose& the();
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bool is_available() const { return m_available; }
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OwnPtr<KBuffer> entry_point() const;
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OwnPtr<KBuffer> structure_table() const;
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size_t entry_point_length() const;
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size_t structure_table_length() const;
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private:
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void set_64_bit_entry_initialization_values();
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void set_32_bit_entry_initialization_values();
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void initialize_exposer();
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Optional<PhysicalAddress> find_entry64bit_point();
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Optional<PhysicalAddress> find_entry32bit_point();
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PhysicalAddress m_entry_point;
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PhysicalAddress m_structure_table;
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bool m_using_64bit_entry_point { false };
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bool m_available { false };
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size_t m_structure_table_length { 0 };
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size_t m_entry_point_length { 0 };
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};
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}
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