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88c5992e0b
Even if the PIC was disabled it can still generate noise (spurious IRQs) so we need to register two handlers for handling such cases. Also, we declare interrupt service routine offset 0x20 to 0x2f as reserved, so when the PIC is disabled, we can handle spurious IRQs from the PIC at separate handlers.
82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Function.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/OwnPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/Types.h>
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#include <Kernel/Firmware/ACPI/Definitions.h>
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#include <Kernel/Interrupts/GenericInterruptHandler.h>
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#include <Kernel/Interrupts/IOAPIC.h>
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#include <Kernel/Interrupts/IRQController.h>
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namespace Kernel {
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class ISAInterruptOverrideMetadata {
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public:
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ISAInterruptOverrideMetadata(u8 bus, u8 source, u32 global_system_interrupt, u16 flags)
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: m_bus(bus)
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, m_source(source)
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, m_global_system_interrupt(global_system_interrupt)
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, m_flags(flags)
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{
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}
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u8 bus() const { return m_bus; }
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u8 source() const { return m_source; }
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u32 gsi() const { return m_global_system_interrupt; }
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u16 flags() const { return m_flags; }
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private:
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const u8 m_bus;
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const u8 m_source;
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const u32 m_global_system_interrupt;
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const u16 m_flags;
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};
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class InterruptManagement {
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public:
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static InterruptManagement& the();
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static void initialize();
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static bool initialized();
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static u8 acquire_mapped_interrupt_number(u8 original_irq);
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static u8 acquire_irq_number(u8 mapped_interrupt_vector);
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virtual void switch_to_pic_mode();
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virtual void switch_to_ioapic_mode();
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bool smp_enabled() const { return m_smp_enabled; }
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RefPtr<IRQController> get_responsible_irq_controller(u8 interrupt_vector);
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RefPtr<IRQController> get_responsible_irq_controller(IRQControllerType controller_type, u8 interrupt_vector);
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const Vector<ISAInterruptOverrideMetadata>& isa_overrides() const { return m_isa_interrupt_overrides; }
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u8 get_mapped_interrupt_vector(u8 original_irq);
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u8 get_irq_vector(u8 mapped_interrupt_vector);
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void enumerate_interrupt_handlers(Function<void(GenericInterruptHandler&)>);
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IRQController& get_interrupt_controller(int index);
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protected:
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virtual ~InterruptManagement() = default;
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private:
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InterruptManagement();
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PhysicalAddress search_for_madt();
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void locate_apic_data();
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bool m_smp_enabled { false };
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Vector<RefPtr<IRQController>> m_interrupt_controllers;
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Vector<ISAInterruptOverrideMetadata> m_isa_interrupt_overrides;
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Vector<PCIInterruptOverrideMetadata> m_pci_interrupt_overrides;
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PhysicalAddress m_madt;
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};
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}
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