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121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Debug.h>
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#include <Kernel/Arch/i386/CPU.h>
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#include <Kernel/Assertions.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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void SharedIRQHandler::initialize(u8 interrupt_number)
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{
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new SharedIRQHandler(interrupt_number);
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}
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void SharedIRQHandler::register_handler(GenericInterruptHandler& handler)
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{
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#if INTERRUPT_DEBUG
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klog() << "Interrupt Handler registered @ Shared Interrupt Handler " << interrupt_number();
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#endif
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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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#if INTERRUPT_DEBUG
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klog() << "Interrupt Handler unregistered @ Shared Interrupt Handler " << interrupt_number();
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#endif
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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<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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#if INTERRUPT_DEBUG
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klog() << "Shared Interrupt Handler registered @ " << interrupt_number();
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#endif
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disable_interrupt_vector();
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}
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SharedIRQHandler::~SharedIRQHandler()
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{
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#if INTERRUPT_DEBUG
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klog() << "Shared Interrupt Handler unregistered @ " << interrupt_number();
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#endif
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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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ASSERT_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<INTERRUPT_DEBUG>("Going for Interrupt Handling @ {}, Shared Interrupt {}", i, interrupt_number());
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ASSERT(handler != nullptr);
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handler->increment_invoking_counter();
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handler->handle_interrupt(regs);
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dbgln<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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