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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/Interrupts/IRQHandler.h>
#include <Kernel/Interrupts/InterruptManagement.h>
//#define IRQ_DEBUG
namespace Kernel {
IRQHandler::IRQHandler(u8 irq)
: GenericInterruptHandler(irq)
, m_responsible_irq_controller(InterruptManagement::the().get_responsible_irq_controller(irq))
{
disable_irq();
}
IRQHandler::~IRQHandler()
{
}
bool IRQHandler::eoi()
{
#ifdef IRQ_DEBUG
dbg() << "EOI IRQ " << interrupt_number();
#endif
if (!m_shared_with_others) {
ASSERT(!m_responsible_irq_controller.is_null());
m_responsible_irq_controller->eoi(*this);
return true;
}
return false;
}
void IRQHandler::enable_irq()
{
#ifdef IRQ_DEBUG
dbg() << "Enable IRQ " << interrupt_number();
#endif
m_enabled = true;
if (!m_shared_with_others)
m_responsible_irq_controller->enable(*this);
}
void IRQHandler::disable_irq()
{
#ifdef IRQ_DEBUG
dbg() << "Disable IRQ " << interrupt_number();
#endif
m_enabled = false;
if (!m_shared_with_others)
m_responsible_irq_controller->disable(*this);
}
void IRQHandler::change_irq_number(u8 irq)
{
InterruptDisabler disabler;
change_interrupt_number(irq);
m_responsible_irq_controller = InterruptManagement::the().get_responsible_irq_controller(irq);
}
}
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