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72 lines
2.0 KiB
C++
72 lines
2.0 KiB
C++
/*
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* Copyright (c) 2021, 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/HashMap.h>
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#include <AK/NonnullOwnPtrVector.h>
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#include <AK/OwnPtr.h>
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#include <AK/Types.h>
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#include <Kernel/ACPI/Definitions.h>
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#include <Kernel/Bus/PCI/Access.h>
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#include <Kernel/Locking/Spinlock.h>
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#include <Kernel/Memory/AnonymousVMObject.h>
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#include <Kernel/Memory/PhysicalRegion.h>
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#include <Kernel/Memory/Region.h>
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#include <Kernel/Memory/VMObject.h>
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namespace Kernel {
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namespace PCI {
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#define PCI_MMIO_CONFIG_SPACE_SIZE 4096
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class MMIOAccess : public Access {
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public:
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class MMIOSegment {
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public:
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MMIOSegment(PhysicalAddress, u8, u8);
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u8 get_start_bus() const;
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u8 get_end_bus() const;
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size_t get_size() const;
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PhysicalAddress get_paddr() const;
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private:
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PhysicalAddress m_base_addr;
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u8 m_start_bus;
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u8 m_end_bus;
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};
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static void initialize(PhysicalAddress mcfg);
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private:
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PhysicalAddress determine_memory_mapped_bus_region(u32 segment, u8 bus) const;
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void map_bus_region(u32, u8);
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VirtualAddress get_device_configuration_space(Address address);
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Spinlock<u8> m_access_lock;
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u8 m_mapped_bus { 0 };
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OwnPtr<Memory::Region> m_mapped_region;
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protected:
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explicit MMIOAccess(PhysicalAddress mcfg);
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virtual u32 segment_count() const override;
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virtual void enumerate_hardware(Function<void(Address, ID)>) override;
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virtual void write8_field(Address address, u32, u8) override;
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virtual void write16_field(Address address, u32, u16) override;
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virtual void write32_field(Address address, u32, u32) override;
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virtual u8 read8_field(Address address, u32) override;
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virtual u16 read16_field(Address address, u32) override;
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virtual u32 read32_field(Address address, u32) override;
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virtual u8 segment_start_bus(u32) const override;
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virtual u8 segment_end_bus(u32) const override;
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PhysicalAddress m_mcfg;
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HashMap<u16, MMIOSegment> m_segments;
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};
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}
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}
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