64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
#pragma once
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#include <BAN/Vector.h>
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#include <kernel/InterruptController.h>
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#include <kernel/Memory/Types.h>
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namespace Kernel
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{
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class APIC final : public InterruptController
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{
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public:
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virtual void eoi(uint8_t) override;
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virtual void enable_irq(uint8_t) override;
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virtual bool is_in_service(uint8_t) override;
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virtual BAN::ErrorOr<void> reserve_irq(uint8_t irq) override;
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virtual BAN::Optional<uint8_t> get_free_irq() override;
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private:
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uint32_t read_from_local_apic(ptrdiff_t);
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void write_to_local_apic(ptrdiff_t, uint32_t);
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private:
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~APIC() { ASSERT_NOT_REACHED(); }
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static APIC* create();
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friend class InterruptController;
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private:
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struct Processor
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{
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enum Flags : uint8_t
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{
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Enabled = 1,
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OnlineCapable = 2,
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};
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uint8_t processor_id;
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uint8_t apic_id;
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uint8_t flags;
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};
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struct IOAPIC
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{
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uint8_t id;
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Kernel::paddr_t paddr;
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Kernel::vaddr_t vaddr;
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uint32_t gsi_base;
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uint8_t max_redirs;
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uint32_t read(uint8_t offset);
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void write(uint8_t offset, uint32_t data);
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};
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private:
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BAN::Vector<Processor> m_processors;
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Kernel::paddr_t m_local_apic_paddr = 0;
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Kernel::vaddr_t m_local_apic_vaddr = 0;
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BAN::Vector<IOAPIC> m_io_apics;
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uint8_t m_irq_overrides[0x100] {};
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uint8_t m_reserved_gsis[0x100 / 8] {};
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};
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}
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