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
|
/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringView.h>
#include <Kernel/FileSystem/OpenFileDescription.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Firmware/BIOS/Component.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Firmware/BIOS/DMI/Definitions.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Firmware/BIOS/Directory.h>
#include <Kernel/Firmware/BIOS.h>
#include <Kernel/KBufferBuilder.h>
#include <Kernel/Memory/MemoryManager.h>
#include <Kernel/Memory/TypedMapping.h>
#include <Kernel/Sections.h>
namespace Kernel {
#define SMBIOS_BASE_SEARCH_ADDR 0xf0000
#define SMBIOS_END_SEARCH_ADDR 0xfffff
#define SMBIOS_SEARCH_AREA_SIZE (SMBIOS_END_SEARCH_ADDR - SMBIOS_BASE_SEARCH_ADDR)
UNMAP_AFTER_INIT void BIOSSysFSDirectory::set_dmi_64_bit_entry_initialization_values()
{
dbgln("BIOSSysFSDirectory: SMBIOS 64bit Entry point @ {}", m_dmi_entry_point);
auto smbios_entry = Memory::map_typed<SMBIOS::EntryPoint64bit>(m_dmi_entry_point, SMBIOS_SEARCH_AREA_SIZE).release_value_but_fixme_should_propagate_errors();
m_smbios_structure_table = PhysicalAddress(smbios_entry.ptr()->table_ptr);
m_dmi_entry_point_length = smbios_entry.ptr()->length;
m_smbios_structure_table_length = smbios_entry.ptr()->table_maximum_size;
}
UNMAP_AFTER_INIT void BIOSSysFSDirectory::set_dmi_32_bit_entry_initialization_values()
{
dbgln("BIOSSysFSDirectory: SMBIOS 32bit Entry point @ {}", m_dmi_entry_point);
auto smbios_entry = Memory::map_typed<SMBIOS::EntryPoint32bit>(m_dmi_entry_point, SMBIOS_SEARCH_AREA_SIZE).release_value_but_fixme_should_propagate_errors();
m_smbios_structure_table = PhysicalAddress(smbios_entry.ptr()->legacy_structure.smbios_table_ptr);
m_dmi_entry_point_length = smbios_entry.ptr()->length;
m_smbios_structure_table_length = smbios_entry.ptr()->legacy_structure.smbios_table_length;
}
UNMAP_AFTER_INIT NonnullRefPtr<BIOSSysFSDirectory> BIOSSysFSDirectory::must_create(FirmwareSysFSDirectory& firmware_directory)
{
auto bios_directory = MUST(adopt_nonnull_ref_or_enomem(new (nothrow) BIOSSysFSDirectory(firmware_directory)));
bios_directory->create_components();
return bios_directory;
}
void BIOSSysFSDirectory::create_components()
{
if (m_dmi_entry_point.is_null() || m_smbios_structure_table.is_null())
return;
if (m_dmi_entry_point_length == 0) {
dbgln("BIOSSysFSDirectory: invalid dmi entry length");
return;
}
if (m_smbios_structure_table_length == 0) {
dbgln("BIOSSysFSDirectory: invalid smbios structure table length");
return;
}
MUST(m_child_components.with([&](auto& list) -> ErrorOr<void> {
list.append(BIOSSysFSComponent::must_create(BIOSSysFSComponent::Type::DMIEntryPoint, m_dmi_entry_point, m_dmi_entry_point_length));
list.append(BIOSSysFSComponent::must_create(BIOSSysFSComponent::Type::SMBIOSTable, m_smbios_structure_table, m_smbios_structure_table_length));
return {};
}));
}
UNMAP_AFTER_INIT void BIOSSysFSDirectory::initialize_dmi_exposer()
{
VERIFY(!(m_dmi_entry_point.is_null()));
if (m_using_64bit_dmi_entry_point) {
set_dmi_64_bit_entry_initialization_values();
} else {
set_dmi_32_bit_entry_initialization_values();
}
dbgln("BIOSSysFSDirectory: Data table @ {}", m_smbios_structure_table);
}
UNMAP_AFTER_INIT BIOSSysFSDirectory::BIOSSysFSDirectory(FirmwareSysFSDirectory& firmware_directory)
: SysFSDirectory(firmware_directory)
{
auto entry_32bit = find_dmi_entry32bit_point();
if (entry_32bit.has_value()) {
m_dmi_entry_point = entry_32bit.value();
}
auto entry_64bit = find_dmi_entry64bit_point();
if (entry_64bit.has_value()) {
m_dmi_entry_point = entry_64bit.value();
m_using_64bit_dmi_entry_point = true;
}
if (m_dmi_entry_point.is_null())
return;
initialize_dmi_exposer();
}
UNMAP_AFTER_INIT Optional<PhysicalAddress> BIOSSysFSDirectory::find_dmi_entry64bit_point()
{
auto bios_or_error = map_bios();
if (bios_or_error.is_error())
return {};
return bios_or_error.value().find_chunk_starting_with("_SM3_"sv, 16);
}
UNMAP_AFTER_INIT Optional<PhysicalAddress> BIOSSysFSDirectory::find_dmi_entry32bit_point()
{
auto bios_or_error = map_bios();
if (bios_or_error.is_error())
return {};
return bios_or_error.value().find_chunk_starting_with("_SM_"sv, 16);
}
}
|
