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Serenity Operating System
1/*
2 * Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <Kernel/Interrupts/InterruptManagement.h>
28#include <Kernel/Interrupts/SpuriousInterruptHandler.h>
29
30namespace Kernel {
31
32void SpuriousInterruptHandler::initialize(u8 interrupt_number)
33{
34 new SpuriousInterruptHandler(interrupt_number);
35}
36
37void SpuriousInterruptHandler::register_handler(GenericInterruptHandler&)
38{
39}
40void SpuriousInterruptHandler::unregister_handler(GenericInterruptHandler&)
41{
42}
43
44bool SpuriousInterruptHandler::eoi()
45{
46 // FIXME: Actually check if IRQ7 or IRQ15 are spurious, and if not, call EOI with the correct interrupt number.
47 m_responsible_irq_controller->eoi(*this);
48 return false;
49}
50
51SpuriousInterruptHandler::SpuriousInterruptHandler(u8 irq)
52 : GenericInterruptHandler(irq)
53 , m_responsible_irq_controller(InterruptManagement::the().get_responsible_irq_controller(irq))
54{
55}
56
57SpuriousInterruptHandler::~SpuriousInterruptHandler()
58{
59}
60
61void SpuriousInterruptHandler::handle_interrupt(const RegisterState&)
62{
63 // FIXME: Actually check if IRQ7 or IRQ15 are spurious, and if not, call the real handler to handle the IRQ.
64 klog() << "Spurious Interrupt, vector " << interrupt_number();
65}
66
67void SpuriousInterruptHandler::enable_interrupt_vector()
68{
69 if (m_enabled)
70 return;
71 m_enabled = true;
72 m_responsible_irq_controller->enable(*this);
73}
74
75void SpuriousInterruptHandler::disable_interrupt_vector()
76{
77 if (!m_enabled)
78 return;
79 m_enabled = false;
80 m_responsible_irq_controller->disable(*this);
81}
82
83const char* SpuriousInterruptHandler::controller() const
84{
85 if (m_responsible_irq_controller->type() == IRQControllerType::i82093AA)
86 return "";
87 return m_responsible_irq_controller->model();
88}
89}