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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/SinglyLinkedList.h>
#include <AK/Types.h>
#include <AK/Vector.h>
#include <Kernel/KBuffer.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/VM/Region.h>
#include <Kernel/VirtualAddress.h>
namespace Kernel::SMBIOS {
struct [[gnu::packed]] LegacyEntryPoint32bit {
char legacy_sig[5];
u8 checksum2;
u16 smboios_table_length;
u32 smbios_table_ptr;
u16 smbios_tables_count;
u8 smbios_bcd_revision;
};
struct [[gnu::packed]] EntryPoint32bit {
char sig[4];
u8 checksum;
u8 length;
u8 major_version;
u8 minor_version;
u16 maximum_structure_size;
u8 implementation_revision;
char formatted_area[5];
LegacyEntryPoint32bit legacy_structure;
};
struct [[gnu::packed]] EntryPoint64bit {
char sig[5];
u8 checksum;
u8 length;
u8 major_version;
u8 minor_version;
u8 document_revision;
u8 revision;
u8 reserved;
u32 table_maximum_size;
u64 table_ptr;
};
}
namespace Kernel {
class DMIExpose {
public:
static void initialize();
DMIExpose();
static DMIExpose& the();
bool is_available() const { return m_available; }
OwnPtr<KBuffer> entry_point() const;
OwnPtr<KBuffer> structure_table() const;
size_t entry_point_length() const;
size_t structure_table_length() const;
private:
void set_64_bit_entry_initialization_values();
void set_32_bit_entry_initialization_values();
void initialize_exposer();
Optional<PhysicalAddress> find_entry64bit_point();
Optional<PhysicalAddress> find_entry32bit_point();
PhysicalAddress m_entry_point;
PhysicalAddress m_structure_table;
bool m_using_64bit_entry_point { false };
bool m_available { false };
size_t m_structure_table_length { 0 };
size_t m_entry_point_length { 0 };
};
}
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