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b97a00d4b1
The `#pragma GCC diagnostic` part is needed because the class has virtual methods with the same name but different arguments, and Clang tries to warn us that we are not actually overriding anything with these. Weirdly enough, GCC does not seem to care.
88 lines
3.1 KiB
C++
88 lines
3.1 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 <Kernel/Interrupts/IRQController.h>
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#include <Kernel/VM/TypedMapping.h>
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namespace Kernel {
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struct [[gnu::packed]] ioapic_mmio_regs {
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volatile u32 select;
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u32 reserved[3];
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volatile u32 window;
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};
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class PCIInterruptOverrideMetadata {
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public:
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PCIInterruptOverrideMetadata(u8 bus_id, u8 polarity, u8 trigger_mode, u8 source_irq, u32 ioapic_id, u16 ioapic_int_pin);
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u8 bus() const { return m_bus_id; }
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u8 polarity() const { return m_polarity; }
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u8 trigger_mode() const { return m_trigger_mode; }
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u8 pci_interrupt_pin() const { return m_pci_interrupt_pin; }
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u8 pci_device_number() const { return m_pci_device_number; }
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u32 ioapic_id() const { return m_ioapic_id; }
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u16 ioapic_interrupt_pin() const { return m_ioapic_interrupt_pin; }
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private:
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const u8 m_bus_id;
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const u8 m_polarity;
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const u8 m_trigger_mode;
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const u8 m_pci_interrupt_pin;
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const u8 m_pci_device_number;
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const u32 m_ioapic_id;
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const u16 m_ioapic_interrupt_pin;
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};
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class IOAPIC final : public IRQController {
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public:
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IOAPIC(PhysicalAddress, u32 gsi_base);
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virtual void enable(const GenericInterruptHandler&) override;
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virtual void disable(const GenericInterruptHandler&) override;
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virtual void hard_disable() override;
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virtual void eoi(const GenericInterruptHandler&) const override;
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virtual void spurious_eoi(const GenericInterruptHandler&) const override;
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virtual bool is_vector_enabled(u8 number) const override;
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virtual bool is_enabled() const override;
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virtual u16 get_isr() const override;
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virtual u16 get_irr() const override;
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virtual u32 gsi_base() const override { return m_gsi_base; }
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virtual size_t interrupt_vectors_count() const override { return m_redirection_entries_count; }
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virtual const char* model() const override { return "IOAPIC"; };
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virtual IRQControllerType type() const override { return IRQControllerType::i82093AA; }
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private:
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void configure_redirection_entry(int index, u8 interrupt_vector, u8 delivery_mode, bool logical_destination, bool active_low, bool trigger_level_mode, bool masked, u8 destination) const;
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void reset_redirection_entry(int index) const;
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void map_interrupt_redirection(u8 interrupt_vector);
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void reset_all_redirection_entries() const;
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void mask_all_redirection_entries() const;
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void mask_redirection_entry(u8 index) const;
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void unmask_redirection_entry(u8 index) const;
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bool is_redirection_entry_masked(u8 index) const;
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u8 read_redirection_entry_vector(u8 index) const;
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Optional<int> find_redirection_entry_by_vector(u8 vector) const;
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void configure_redirections() const;
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void write_register(u32 index, u32 value) const;
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u32 read_register(u32 index) const;
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virtual void initialize() override;
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void map_isa_interrupts();
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void map_pci_interrupts();
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void isa_identity_map(int index);
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PhysicalAddress m_address;
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mutable TypedMapping<ioapic_mmio_regs> m_regs;
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u32 m_gsi_base;
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u8 m_id;
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u8 m_version;
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size_t m_redirection_entries_count;
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};
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}
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