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8b38be3072
Setting the m_enabled variable to true or false can help with monitoring the IRQHandler object(s) later, and there's no good reason to have an if-else statement in those methods anyway.
86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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/Interrupts/IRQHandler.h>
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#include <Kernel/Interrupts/InterruptManagement.h>
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//#define IRQ_DEBUG
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namespace Kernel {
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IRQHandler::IRQHandler(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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disable_irq();
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}
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IRQHandler::~IRQHandler()
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{
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}
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bool IRQHandler::eoi()
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{
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#ifdef IRQ_DEBUG
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dbg() << "EOI IRQ " << interrupt_number();
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#endif
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if (!m_shared_with_others) {
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ASSERT(!m_responsible_irq_controller.is_null());
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m_responsible_irq_controller->eoi(*this);
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return true;
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}
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return false;
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}
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void IRQHandler::enable_irq()
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{
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#ifdef IRQ_DEBUG
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dbg() << "Enable IRQ " << interrupt_number();
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#endif
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m_enabled = true;
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if (!m_shared_with_others)
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m_responsible_irq_controller->enable(*this);
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}
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void IRQHandler::disable_irq()
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{
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#ifdef IRQ_DEBUG
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dbg() << "Disable IRQ " << interrupt_number();
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#endif
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m_enabled = false;
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if (!m_shared_with_others)
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m_responsible_irq_controller->disable(*this);
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}
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void IRQHandler::change_irq_number(u8 irq)
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{
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InterruptDisabler disabler;
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change_interrupt_number(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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