70 lines
1.4 KiB
C++
70 lines
1.4 KiB
C++
/*
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* \brief Round-robin scheduler
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* \author Martin Stein
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* \date 2014-02-28
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*/
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/*
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* Copyright (C) 2012-2014 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* core includes */
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#include <kernel/processor.h>
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#include <kernel/irq.h>
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#include <pic.h>
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#include <timer.h>
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using namespace Kernel;
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namespace Kernel
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{
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Pic * pic();
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Timer * timer();
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void reset_lap_time(unsigned const);
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}
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void Kernel::Execution_context::_interrupt(unsigned const processor_id)
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{
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/* determine handling for specific interrupt */
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unsigned irq_id;
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if (pic()->take_request(irq_id))
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{
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/* check wether the interrupt is a scheduling timeout */
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if (timer()->interrupt_id(processor_id) == irq_id)
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{
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/* handle scheduling timeout */
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__processor->scheduler()->yield_occupation();
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timer()->clear_interrupt(processor_id);
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reset_lap_time(processor_id);
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} else {
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/* try to inform the user interrupt-handler */
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Irq::occurred(irq_id);
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}
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}
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/* end interrupt request at controller */
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pic()->finish_request();
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}
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void Kernel::Execution_context::_schedule()
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{
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__processor->scheduler()->insert(this);
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}
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void Kernel::Execution_context::_unschedule()
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{
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__processor->scheduler()->remove(this);
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}
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void Kernel::Execution_context::_yield()
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{
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__processor->scheduler()->yield_occupation();
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}
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