text: /*
   * Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
   *
   * SPDX-License-Identifier: BSD-2-Clause
   */
  
  #include <Kernel/Interrupts/InterruptManagement.h>
  #include <Kernel/Interrupts/SpuriousInterruptHandler.h>
  #include <Kernel/Sections.h>
  
  namespace Kernel {
  
  UNMAP_AFTER_INIT void SpuriousInterruptHandler::initialize(u8 interrupt_number)
  {
      auto* handler = new SpuriousInterruptHandler(interrupt_number);
      handler->register_interrupt_handler();
  }
  
  void SpuriousInterruptHandler::register_handler(GenericInterruptHandler& handler)
  {
      VERIFY(!m_real_handler);
      m_real_handler = adopt_own_if_nonnull(&handler);
  }
  void SpuriousInterruptHandler::unregister_handler(GenericInterruptHandler&)
  {
      TODO();
  }
  
  bool SpuriousInterruptHandler::eoi()
  {
      // Actually check if IRQ7 or IRQ15 are spurious, and if not, call EOI with the correct interrupt number.
      if (m_real_irq) {
          m_responsible_irq_controller->eoi(*this);
          m_real_irq = false; // return to default state!
          return true;
      }
      m_responsible_irq_controller->spurious_eoi(*this);
      return false;
  }
  
  StringView SpuriousInterruptHandler::purpose() const
  {
      if (!m_real_handler)
          return "Spurious Interrupt Handler"sv;
      return m_real_handler->purpose();
  }
  
  SpuriousInterruptHandler::SpuriousInterruptHandler(u8 irq)
      : GenericInterruptHandler(irq)
      , m_responsible_irq_controller(InterruptManagement::the().get_responsible_irq_controller(irq))
  {
  }
  
  SpuriousInterruptHandler::~SpuriousInterruptHandler()
  {
  }
  
  bool SpuriousInterruptHandler::handle_interrupt(const RegisterState& state)
  {
      // Actually check if IRQ7 or IRQ15 are spurious, and if not, call the real handler to handle the IRQ.
      if (m_responsible_irq_controller->get_isr() & (1 << interrupt_number())) {
          m_real_irq = true; // remember that we had a real IRQ, when EOI later!
          if (m_real_handler->handle_interrupt(state)) {
              m_real_handler->increment_invoking_counter();
              return true;
          }
          return false;
      }
      dbgln("Spurious interrupt, vector {}", interrupt_number());
      return true;
  }
  
  void SpuriousInterruptHandler::enable_interrupt_vector()
  {
      if (m_enabled)
          return;
      m_enabled = true;
      m_responsible_irq_controller->enable(*this);
  }
  
  void SpuriousInterruptHandler::disable_interrupt_vector()
  {
      VERIFY(!m_real_irq); // this flag should not be set when we call this method
      if (!m_enabled)
          return;
      m_enabled = false;
      m_responsible_irq_controller->disable(*this);
  }
  
  StringView SpuriousInterruptHandler::controller() const
  {
      if (m_responsible_irq_controller->type() == IRQControllerType::i82093AA)
          return "";
      return m_responsible_irq_controller->model();
  }
  }
  