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95 lines
2.7 KiB
C++
95 lines
2.7 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/Arch/x86/CPU.h>
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#include <Kernel/Assertions.h>
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#include <Kernel/Debug.h>
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#include <Kernel/Interrupts/IRQHandler.h>
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#include <Kernel/Interrupts/InterruptManagement.h>
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#include <Kernel/Interrupts/PIC.h>
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#include <Kernel/Interrupts/SharedIRQHandler.h>
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namespace Kernel {
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UNMAP_AFTER_INIT void SharedIRQHandler::initialize(u8 interrupt_number)
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{
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auto* handler = new SharedIRQHandler(interrupt_number);
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handler->register_interrupt_handler();
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handler->disable_interrupt_vector();
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}
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void SharedIRQHandler::register_handler(GenericInterruptHandler& handler)
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{
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dbgln_if(INTERRUPT_DEBUG, "Interrupt Handler registered @ Shared Interrupt Handler {}", interrupt_number());
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m_handlers.set(&handler);
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enable_interrupt_vector();
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}
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void SharedIRQHandler::unregister_handler(GenericInterruptHandler& handler)
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{
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dbgln_if(INTERRUPT_DEBUG, "Interrupt Handler unregistered @ Shared Interrupt Handler {}", interrupt_number());
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m_handlers.remove(&handler);
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if (m_handlers.is_empty())
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disable_interrupt_vector();
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}
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bool SharedIRQHandler::eoi()
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{
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dbgln_if(INTERRUPT_DEBUG, "EOI IRQ {}", interrupt_number());
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m_responsible_irq_controller->eoi(*this);
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return true;
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}
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SharedIRQHandler::SharedIRQHandler(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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dbgln_if(INTERRUPT_DEBUG, "Shared Interrupt Handler registered @ {}", interrupt_number());
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}
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SharedIRQHandler::~SharedIRQHandler()
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{
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dbgln_if(INTERRUPT_DEBUG, "Shared Interrupt Handler unregistered @ {}", interrupt_number());
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disable_interrupt_vector();
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}
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void SharedIRQHandler::handle_interrupt(const RegisterState& regs)
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{
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VERIFY_INTERRUPTS_DISABLED();
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if constexpr (INTERRUPT_DEBUG) {
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dbgln("Interrupt @ {}", interrupt_number());
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dbgln("Interrupt Handlers registered - {}", m_handlers.size());
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}
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int i = 0;
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for (auto* handler : m_handlers) {
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dbgln_if(INTERRUPT_DEBUG, "Going for Interrupt Handling @ {}, Shared Interrupt {}", i, interrupt_number());
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VERIFY(handler != nullptr);
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handler->increment_invoking_counter();
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handler->handle_interrupt(regs);
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dbgln_if(INTERRUPT_DEBUG, "Going for Interrupt Handling @ {}, Shared Interrupt {} - End", i, interrupt_number());
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i++;
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}
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}
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void SharedIRQHandler::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 SharedIRQHandler::disable_interrupt_vector()
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{
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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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}
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