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07474b4349
First scan PCI bus 0. Find any device on that bus, and if it's a PCI-to-PCI bridge, recursively scan it too. Then try to handle Multiple PCI host bridges on slot 0, device 0. If we happen to miss some PCI buses because they are not reachable through recursive PCI-to-PCI bridges scanning starting from bus 0, we might find them in this scanning.
57 lines
1.8 KiB
C++
57 lines
1.8 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/Bitmap.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <Kernel/PCI/Definitions.h>
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namespace Kernel {
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class PCI::Access {
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public:
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void enumerate(Function<void(Address, ID)>&) const;
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void enumerate_bus(int type, u8 bus, Function<void(Address, ID)>&, bool recursive);
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void enumerate_functions(int type, u8 bus, u8 device, u8 function, Function<void(Address, ID)>& callback, bool recursive);
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void enumerate_device(int type, u8 bus, u8 device, Function<void(Address, ID)>& callback, bool recursive);
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static Access& the();
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static bool is_initialized();
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virtual uint32_t segment_count() const = 0;
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virtual uint8_t segment_start_bus(u32 segment) const = 0;
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virtual uint8_t segment_end_bus(u32 segment) const = 0;
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virtual const char* access_type() const = 0;
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virtual void write8_field(Address address, u32 field, u8 value) = 0;
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virtual void write16_field(Address address, u32 field, u16 value) = 0;
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virtual void write32_field(Address address, u32 field, u32 value) = 0;
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virtual u8 read8_field(Address address, u32 field) = 0;
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virtual u16 read16_field(Address address, u32 field) = 0;
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virtual u32 read32_field(Address address, u32 field) = 0;
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PhysicalID get_physical_id(Address address) const;
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protected:
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virtual void enumerate_hardware(Function<void(Address, ID)>) = 0;
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u8 early_read8_field(Address address, u32 field);
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u16 early_read16_field(Address address, u32 field);
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u32 early_read32_field(Address address, u32 field);
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u16 early_read_type(Address address);
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Access();
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virtual ~Access() = default;
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Vector<PhysicalID> m_physical_ids;
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Bitmap m_enumerated_buses;
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};
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}
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