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/*
* Copyright (c) 2020-2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Types.h>
#include <Kernel/CommandLine.h>
#include <Kernel/FileSystem/SysFS/Component.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Firmware/Directory.h>
#include <Kernel/Firmware/ACPI/Definitions.h>
#include <Kernel/Firmware/ACPI/Initialize.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Library/LockRefPtr.h>
#include <Kernel/Memory/PhysicalAddress.h>
#include <Kernel/Memory/Region.h>
#include <Kernel/Memory/TypedMapping.h>
#include <Kernel/Memory/VirtualAddress.h>
namespace Kernel::ACPI {
class ACPISysFSDirectory : public SysFSDirectory {
public:
virtual StringView name() const override { return "acpi"sv; }
static NonnullLockRefPtr<ACPISysFSDirectory> must_create(FirmwareSysFSDirectory& firmware_directory);
private:
void find_tables_and_register_them_as_components();
explicit ACPISysFSDirectory(FirmwareSysFSDirectory& firmware_directory);
};
class ACPISysFSComponent : public SysFSComponent {
public:
static NonnullLockRefPtr<ACPISysFSComponent> create(StringView name, PhysicalAddress, size_t table_size);
virtual StringView name() const override { return m_table_name->view(); }
virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
virtual size_t size() const override final { return m_length; }
protected:
ErrorOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const;
ACPISysFSComponent(NonnullOwnPtr<KString> table_name, PhysicalAddress, size_t table_size);
PhysicalAddress m_paddr;
size_t m_length { 0 };
NonnullOwnPtr<KString> m_table_name;
};
class Parser final : public IRQHandler {
public:
static Parser* the();
static void must_initialize(PhysicalAddress rsdp, PhysicalAddress fadt, u8 irq_number);
virtual StringView purpose() const override { return "ACPI Parser"sv; }
virtual bool handle_irq(RegisterState const&) override;
Optional<PhysicalAddress> find_table(StringView signature);
void try_acpi_reboot();
bool can_reboot();
void try_acpi_shutdown();
bool can_shutdown() { return false; }
void enable_aml_parsing();
PhysicalAddress rsdp() const { return m_rsdp; }
PhysicalAddress main_system_description_table() const { return m_main_system_description_table; }
bool is_xsdt_supported() const { return m_xsdt_supported; }
void enumerate_static_tables(Function<void(StringView, PhysicalAddress, size_t)>);
virtual bool have_8042() const
{
return m_x86_specific_flags.keyboard_8042;
}
FADTFlags::HardwareFeatures const& hardware_features() const { return m_hardware_flags; }
FADTFlags::x86_Specific_Flags const& x86_specific_flags() const { return m_x86_specific_flags; }
~Parser() = default;
private:
Parser(PhysicalAddress rsdp, PhysicalAddress fadt, u8 irq_number);
void locate_static_data();
void locate_main_system_description_table();
void initialize_main_system_description_table();
size_t get_table_size(PhysicalAddress);
u8 get_table_revision(PhysicalAddress);
void process_fadt_data();
void process_dsdt();
bool validate_reset_register(Memory::TypedMapping<Structures::FADT> const&);
void access_generic_address(Structures::GenericAddressStructure const&, u32 value);
PhysicalAddress m_rsdp;
PhysicalAddress m_main_system_description_table;
Vector<PhysicalAddress> m_sdt_pointers;
PhysicalAddress m_fadt;
bool m_xsdt_supported { false };
bool m_can_process_bytecode { false };
FADTFlags::HardwareFeatures m_hardware_flags;
FADTFlags::x86_Specific_Flags m_x86_specific_flags;
};
}
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