Kernel: Move ACPI and BIOS code into the new Firmware directory

This will somwhat help unify them also under the same SysFS directory in
the commit.
Also, it feels much more like this change reflects the reality that both
ACPI and the BIOS are part of the firmware on x86 computers.

2 files changed, 0 insertions, 299 deletions

diff --git a/Kernel/Arch/PC/BIOS.cpp b/Kernel/Arch/PC/BIOS.cpp
deleted file mode 100644
index 6b3ef621c7..0000000000
--- a/Kernel/Arch/PC/BIOS.cpp
+++ /dev/null
@@ -1,183 +0,0 @@
-/*
- * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
- * Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#include <AK/StringView.h>
-#include <Kernel/Arch/PC/BIOS.h>
-#include <Kernel/FileSystem/OpenFileDescription.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 NonnullRefPtr<DMIEntryPointExposedBlob> DMIEntryPointExposedBlob::create(PhysicalAddress dmi_entry_point, size_t blob_size)
-{
-    return adopt_ref(*new (nothrow) DMIEntryPointExposedBlob(dmi_entry_point, blob_size));
-}
-
-UNMAP_AFTER_INIT BIOSSysFSComponent::BIOSSysFSComponent(String name)
-    : SysFSComponent(name)
-{
-}
-
-KResultOr<size_t> BIOSSysFSComponent::read_bytes(off_t offset, size_t count, UserOrKernelBuffer& buffer, OpenFileDescription*) const
-{
-    auto blob = TRY(try_to_generate_buffer());
-
-    if ((size_t)offset >= blob->size())
-        return KSuccess;
-
-    ssize_t nread = min(static_cast<off_t>(blob->size() - offset), static_cast<off_t>(count));
-    TRY(buffer.write(blob->data() + offset, nread));
-    return nread;
-}
-
-UNMAP_AFTER_INIT DMIEntryPointExposedBlob::DMIEntryPointExposedBlob(PhysicalAddress dmi_entry_point, size_t blob_size)
-    : BIOSSysFSComponent("smbios_entry_point")
-    , m_dmi_entry_point(dmi_entry_point)
-    , m_dmi_entry_point_length(blob_size)
-{
-}
-
-KResultOr<NonnullOwnPtr<KBuffer>> DMIEntryPointExposedBlob::try_to_generate_buffer() const
-{
-    auto dmi_blob = Memory::map_typed<u8>((m_dmi_entry_point), m_dmi_entry_point_length);
-    return KBuffer::try_create_with_bytes(Span<u8> { dmi_blob.ptr(), m_dmi_entry_point_length });
-}
-
-UNMAP_AFTER_INIT NonnullRefPtr<SMBIOSExposedTable> SMBIOSExposedTable::create(PhysicalAddress smbios_structure_table, size_t smbios_structure_table_length)
-{
-    return adopt_ref(*new (nothrow) SMBIOSExposedTable(smbios_structure_table, smbios_structure_table_length));
-}
-
-UNMAP_AFTER_INIT SMBIOSExposedTable::SMBIOSExposedTable(PhysicalAddress smbios_structure_table, size_t smbios_structure_table_length)
-    : BIOSSysFSComponent("DMI")
-    , m_smbios_structure_table(smbios_structure_table)
-    , m_smbios_structure_table_length(smbios_structure_table_length)
-{
-}
-
-KResultOr<NonnullOwnPtr<KBuffer>> SMBIOSExposedTable::try_to_generate_buffer() const
-{
-    auto dmi_blob = Memory::map_typed<u8>((m_smbios_structure_table), m_smbios_structure_table_length);
-    return KBuffer::try_create_with_bytes(Span<u8> { dmi_blob.ptr(), m_smbios_structure_table_length });
-}
-
-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);
-    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);
-    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.smboios_table_length;
-}
-
-UNMAP_AFTER_INIT void BIOSSysFSDirectory::initialize()
-{
-    auto bios_directory = adopt_ref(*new (nothrow) BIOSSysFSDirectory());
-    SysFSComponentRegistry::the().register_new_component(bios_directory);
-    bios_directory->create_components();
-}
-
-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;
-    }
-    auto dmi_entry_point = DMIEntryPointExposedBlob::create(m_dmi_entry_point, m_dmi_entry_point_length);
-    m_components.append(dmi_entry_point);
-    auto smbios_table = SMBIOSExposedTable::create(m_smbios_structure_table, m_smbios_structure_table_length);
-    m_components.append(smbios_table);
-}
-
-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()
-    : SysFSDirectory("bios", SysFSComponentRegistry::the().root_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()
-{
-    return map_bios().find_chunk_starting_with("_SM3_", 16);
-}
-
-UNMAP_AFTER_INIT Optional<PhysicalAddress> BIOSSysFSDirectory::find_dmi_entry32bit_point()
-{
-    return map_bios().find_chunk_starting_with("_SM_", 16);
-}
-
-Memory::MappedROM map_bios()
-{
-    Memory::MappedROM mapping;
-    mapping.size = 128 * KiB;
-    mapping.paddr = PhysicalAddress(0xe0000);
-    mapping.region = MM.allocate_kernel_region(mapping.paddr, Memory::page_round_up(mapping.size), {}, Memory::Region::Access::Read).release_value();
-    return mapping;
-}
-
-Memory::MappedROM map_ebda()
-{
-    auto ebda_segment_ptr = Memory::map_typed<u16>(PhysicalAddress(0x40e));
-    auto ebda_length_ptr_b0 = Memory::map_typed<u8>(PhysicalAddress(0x413));
-    auto ebda_length_ptr_b1 = Memory::map_typed<u8>(PhysicalAddress(0x414));
-
-    PhysicalAddress ebda_paddr(*ebda_segment_ptr << 4);
-    size_t ebda_size = (*ebda_length_ptr_b1 << 8) | *ebda_length_ptr_b0;
-
-    Memory::MappedROM mapping;
-    mapping.region = MM.allocate_kernel_region(ebda_paddr.page_base(), Memory::page_round_up(ebda_size), {}, Memory::Region::Access::Read).release_value();
-    mapping.offset = ebda_paddr.offset_in_page();
-    mapping.size = ebda_size;
-    mapping.paddr = ebda_paddr;
-    return mapping;
-}
-
-}
diff --git a/Kernel/Arch/PC/BIOS.h b/Kernel/Arch/PC/BIOS.h
deleted file mode 100644
index 8e2d539d35..0000000000
--- a/Kernel/Arch/PC/BIOS.h
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * 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/Types.h>
-#include <AK/Vector.h>
-#include <Kernel/FileSystem/SysFS.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 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 {
-
-Memory::MappedROM map_bios();
-Memory::MappedROM map_ebda();
-
-class BIOSSysFSComponent : public SysFSComponent {
-public:
-    virtual KResultOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
-
-protected:
-    virtual KResultOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const = 0;
-    explicit BIOSSysFSComponent(String name);
-};
-
-class DMIEntryPointExposedBlob : public BIOSSysFSComponent {
-public:
-    static NonnullRefPtr<DMIEntryPointExposedBlob> create(PhysicalAddress dmi_entry_point, size_t blob_size);
-
-private:
-    DMIEntryPointExposedBlob(PhysicalAddress dmi_entry_point, size_t blob_size);
-    virtual KResultOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const override;
-    PhysicalAddress m_dmi_entry_point;
-    size_t m_dmi_entry_point_length;
-};
-
-class SMBIOSExposedTable : public BIOSSysFSComponent {
-public:
-    static NonnullRefPtr<SMBIOSExposedTable> create(PhysicalAddress, size_t blob_size);
-
-private:
-    SMBIOSExposedTable(PhysicalAddress dmi_entry_point, size_t blob_size);
-    virtual KResultOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const override;
-
-    PhysicalAddress m_smbios_structure_table;
-    size_t m_smbios_structure_table_length;
-};
-
-class BIOSSysFSDirectory : public SysFSDirectory {
-public:
-    static void initialize();
-
-    void create_components();
-
-private:
-    BIOSSysFSDirectory();
-
-    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 };
-};
-
-}