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https://github.com/RGBCube/serenity
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6f914ed0a4
The IRQController object is RefCounted, and is shared between the InterruptManagement class & IRQ handlers' classes. IRQHandler, SharedIRQHandler & SpuriousInterruptHandler classes use a responsible IRQ controller directly instead of calling InterruptManagement for disable(), enable() or eoi(). Also, the initialization process of InterruptManagement is simplified, so it doesn't rely on an ACPI parser to be initialized.
129 lines
4.1 KiB
C++
129 lines
4.1 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 <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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//#define INTERRUPT_DEBUG
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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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#ifdef INTERRUPT_DEBUG
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kprintf("Interrupt Handler registered @ Shared Interrupt Handler %d\n", m_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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#ifdef INTERRUPT_DEBUG
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kprintf("Interrupt Handler unregistered @ Shared Interrupt Handler %d\n", m_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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#ifdef INTERRUPT_DEBUG
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dbg() << "EOI IRQ " << interrupt_number();
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#endif
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m_responsible_irq_controller->eoi(interrupt_number());
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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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#ifdef INTERRUPT_DEBUG
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kprintf("Shared Interrupt Handler registered @ %d\n", m_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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#ifdef INTERRUPT_DEBUG
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kprintf("Shared Interrupt Handler unregistered @ %d\n", 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(RegisterState& regs)
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{
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ASSERT_INTERRUPTS_DISABLED();
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increment_invoking_counter();
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#ifdef INTERRUPT_DEBUG
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dbg() << "Interrupt @ " << interrupt_number();
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dbg() << "Interrupt Handlers registered - " << m_handlers.size();
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#endif
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int i = 0;
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for (auto* handler : m_handlers) {
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#ifdef INTERRUPT_DEBUG
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dbg() << "Going for Interrupt Handling @ " << i << ", Shared Interrupt " << interrupt_number();
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#endif
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ASSERT(handler != nullptr);
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if (handler->is_enabled()) {
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handler->increment_invoking_counter();
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handler->handle_interrupt(regs);
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}
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#ifdef INTERRUPT_DEBUG
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dbg() << "Going for Interrupt Handling @ " << i << ", Shared Interrupt " << interrupt_number() << " - End";
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#endif
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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(interrupt_number());
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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(interrupt_number());
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}
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}
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