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SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Interrupts/InterruptManagement.h>
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#include <Kernel/Interrupts/SpuriousInterruptHandler.h>
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namespace Kernel {
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UNMAP_AFTER_INIT void SpuriousInterruptHandler::initialize(u8 interrupt_number)
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{
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auto* handler = new SpuriousInterruptHandler(interrupt_number);
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handler->register_interrupt_handler();
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}
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void SpuriousInterruptHandler::register_handler(GenericInterruptHandler& handler)
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{
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VERIFY(!m_real_handler);
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m_real_handler = &handler;
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}
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void SpuriousInterruptHandler::unregister_handler(GenericInterruptHandler&)
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{
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TODO();
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}
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bool SpuriousInterruptHandler::eoi()
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{
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// Actually check if IRQ7 or IRQ15 are spurious, and if not, call EOI with the correct interrupt number.
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if (m_real_irq) {
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m_responsible_irq_controller->eoi(*this);
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m_real_irq = false; // return to default state!
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return true;
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}
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m_responsible_irq_controller->spurious_eoi(*this);
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return false;
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}
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const char* SpuriousInterruptHandler::purpose() const
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{
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if (!m_real_handler)
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return "Spurious Interrupt Handler";
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return m_real_handler->purpose();
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}
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SpuriousInterruptHandler::SpuriousInterruptHandler(u8 irq)
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: GenericInterruptHandler(irq)
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, m_responsible_irq_controller(InterruptManagement::the().get_responsible_irq_controller(irq))
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{
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}
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SpuriousInterruptHandler::~SpuriousInterruptHandler()
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{
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}
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void SpuriousInterruptHandler::handle_interrupt(const RegisterState& state)
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{
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// Actually check if IRQ7 or IRQ15 are spurious, and if not, call the real handler to handle the IRQ.
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if (m_responsible_irq_controller->get_isr() & (1 << interrupt_number())) {
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m_real_irq = true; // remember that we had a real IRQ, when EOI later!
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m_real_handler->increment_invoking_counter();
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m_real_handler->handle_interrupt(state);
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return;
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}
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dbgln("Spurious interrupt, vector {}", interrupt_number());
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}
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void SpuriousInterruptHandler::enable_interrupt_vector()
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{
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if (m_enabled)
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return;
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m_enabled = true;
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m_responsible_irq_controller->enable(*this);
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}
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void SpuriousInterruptHandler::disable_interrupt_vector()
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{
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VERIFY(!m_real_irq); // this flag should not be set when we call this method
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if (!m_enabled)
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return;
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m_enabled = false;
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m_responsible_irq_controller->disable(*this);
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}
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const char* SpuriousInterruptHandler::controller() const
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{
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if (m_responsible_irq_controller->type() == IRQControllerType::i82093AA)
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return "";
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return m_responsible_irq_controller->model();
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}
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}
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