blob: 0be5ad40aa0e7bddbc1bc32da010a4056dae0b9f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/RefPtr.h>
#include <AK/Types.h>
#include <AK/Vector.h>
#include <Kernel/FileSystem/SysFS.h>
#include <Kernel/Firmware/SysFSFirmware.h>
#include <Kernel/KBuffer.h>
#include <Kernel/Memory/MappedROM.h>
#include <Kernel/Memory/Region.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/VirtualAddress.h>
namespace Kernel::SMBIOS {
struct [[gnu::packed]] LegacyEntryPoint32bit {
char legacy_sig[5];
u8 checksum2;
u16 smbios_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 {
ErrorOr<Memory::MappedROM> map_bios();
ErrorOr<Memory::MappedROM> map_ebda();
class BIOSSysFSComponent : public SysFSComponent {
public:
virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
protected:
virtual ErrorOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const = 0;
BIOSSysFSComponent();
};
class DMIEntryPointExposedBlob final : public BIOSSysFSComponent {
public:
virtual StringView name() const override { return "smbios_entry_point"sv; }
static NonnullRefPtr<DMIEntryPointExposedBlob> must_create(PhysicalAddress dmi_entry_point, size_t blob_size);
private:
DMIEntryPointExposedBlob(PhysicalAddress dmi_entry_point, size_t blob_size);
virtual ErrorOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const override;
virtual size_t size() const override { return m_dmi_entry_point_length; }
PhysicalAddress m_dmi_entry_point;
size_t const m_dmi_entry_point_length { 0 };
};
class SMBIOSExposedTable final : public BIOSSysFSComponent {
public:
virtual StringView name() const override { return "DMI"sv; }
static NonnullRefPtr<SMBIOSExposedTable> must_create(PhysicalAddress, size_t blob_size);
private:
SMBIOSExposedTable(PhysicalAddress dmi_entry_point, size_t blob_size);
virtual ErrorOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const override;
virtual size_t size() const override { return m_smbios_structure_table_length; }
PhysicalAddress m_smbios_structure_table;
size_t const m_smbios_structure_table_length { 0 };
};
class BIOSSysFSDirectory : public SysFSDirectory {
public:
virtual StringView name() const override { return "bios"sv; }
static NonnullRefPtr<BIOSSysFSDirectory> must_create(FirmwareSysFSDirectory&);
void create_components();
private:
explicit BIOSSysFSDirectory(FirmwareSysFSDirectory&);
void set_dmi_64_bit_entry_initialization_values();
void set_dmi_32_bit_entry_initialization_values();
void initialize_dmi_exposer();
Optional<PhysicalAddress> find_dmi_entry64bit_point();
Optional<PhysicalAddress> find_dmi_entry32bit_point();
PhysicalAddress m_dmi_entry_point;
PhysicalAddress m_smbios_structure_table;
bool m_using_64bit_dmi_entry_point { false };
size_t m_smbios_structure_table_length { 0 };
size_t m_dmi_entry_point_length { 0 };
};
}
|
