1 files changed, 102 insertions, 0 deletions
diff --git a/Kernel/Firmware/ACPI/Parser.h b/Kernel/Firmware/ACPI/Parser.h
new file mode 100644
index 0000000000..f4fbfe8003
--- /dev/null
+++ b/Kernel/Firmware/ACPI/Parser.h
@@ -0,0 +1,102 @@
+/*
+ * 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/SysFSComponent.h>
+#include <Kernel/Firmware/ACPI/Definitions.h>
+#include <Kernel/Firmware/ACPI/Initialize.h>
+#include <Kernel/Interrupts/IRQHandler.h>
+#include <Kernel/Memory/Region.h>
+#include <Kernel/PhysicalAddress.h>
+#include <Kernel/VirtualAddress.h>
+
+namespace Kernel::ACPI {
+
+class ACPISysFSDirectory : public SysFSDirectory {
+public:
+    static void initialize();
+
+private:
+    ACPISysFSDirectory();
+};
+
+class ACPISysFSComponent : public SysFSComponent {
+public:
+    static NonnullRefPtr<ACPISysFSComponent> create(String name, PhysicalAddress, size_t table_size);
+
+    virtual KResultOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
+
+protected:
+    KResultOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const;
+    ACPISysFSComponent(String name, PhysicalAddress, size_t table_size);
+
+    PhysicalAddress m_paddr;
+    size_t m_length;
+};
+
+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"; }
+    virtual bool handle_irq(const RegisterState&) override;
+
+    Optional<PhysicalAddress> find_table(const 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(const StringView&, PhysicalAddress, size_t)>);
+
+    virtual bool have_8042() const
+    {
+        return m_x86_specific_flags.keyboard_8042;
+    }
+
+    const FADTFlags::HardwareFeatures& hardware_features() const { return m_hardware_flags; }
+    const FADTFlags::x86_Specific_Flags& x86_specific_flags() const { return m_x86_specific_flags; }
+
+    ~Parser() {};
+
+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();
+
+    bool validate_reset_register();
+    void access_generic_address(const Structures::GenericAddressStructure&, 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;
+};
+
+}