76 lines
1.4 KiB
C++
76 lines
1.4 KiB
C++
/*
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* \brief Programmable interrupt controller for core
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* \author Reto Buerki
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* \date 2015-04-14
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*/
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/*
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* Copyright (C) 2015-2017 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 Affero General Public License version 3.
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*/
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#ifndef _CORE__SPEC__X86_64__MUEN__PIC_H_
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#define _CORE__SPEC__X86_64__MUEN__PIC_H_
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namespace Board
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{
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/**
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* Programmable interrupt controller for core
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*/
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class Pic;
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}
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class Board::Pic
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{
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public:
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struct Virtual_context {};
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enum {
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/*
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* FIXME: dummy ipi value on non-SMP platform, should be removed
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* when SMP is an aspect of CPUs only compiled where
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* necessary
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*/
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IPI = 255,
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NR_OF_IRQ = 256,
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};
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void irq_occurred(unsigned irq)
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{
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if (irq < NR_OF_IRQ)
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isr[irq] = true;
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}
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bool take_request(unsigned &irq)
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{
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for (int i = 0; i < NR_OF_IRQ; i++) {
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if (isr[i] == true) {
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irq = i;
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isr[i] = false;
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return true;
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}
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}
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return false;
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}
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/*
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* Dummies
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*/
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Pic() { }
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void finish_request() { }
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void unmask(unsigned const, unsigned) { }
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void mask(unsigned const) { }
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bool is_ip_interrupt(unsigned, unsigned) { return false; }
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void store_apic_id(unsigned const) { }
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void irq_mode(unsigned, unsigned, unsigned) { }
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private:
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bool isr[NR_OF_IRQ] = {false};
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};
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#endif /* _CORE__SPEC__X86_64__MUEN__PIC_H_ */
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