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f085903f62
These 2 classes currently contain much code that is x86(_64) specific. Move them to the architecture specific directory. This also allows for a simpler implementation for aarch64.
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/Arch/x86/IRQController.h>
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#include <Kernel/Memory/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(GenericInterruptHandler const&) override;
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virtual void disable(GenericInterruptHandler const&) override;
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virtual void hard_disable() override;
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virtual void eoi(GenericInterruptHandler const&) const override;
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virtual void spurious_eoi(GenericInterruptHandler const&) 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 StringView model() const override { return "IOAPIC"sv; };
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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 Memory::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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