mirror of
https://github.com/RGBCube/serenity
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66 lines
2.2 KiB
C++
66 lines
2.2 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/HashMap.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/Try.h>
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#include <AK/Vector.h>
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#include <Kernel/Bus/PCI/Controller/HostController.h>
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#include <Kernel/Bus/PCI/Definitions.h>
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#include <Kernel/Locking/Spinlock.h>
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namespace Kernel::PCI {
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class Access {
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public:
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static bool initialize_for_multiple_pci_domains(PhysicalAddress mcfg_table);
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#if ARCH(X86_64)
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static bool initialize_for_one_pci_domain();
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#endif
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ErrorOr<void> fast_enumerate(Function<void(DeviceIdentifier const&)>&) const;
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void rescan_hardware();
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static Access& the();
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static bool is_initialized();
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static bool is_disabled();
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static bool is_hardware_disabled();
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void write8_field(DeviceIdentifier const&, u32 field, u8 value);
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void write16_field(DeviceIdentifier const&, u32 field, u16 value);
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void write32_field(DeviceIdentifier const&, u32 field, u32 value);
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u8 read8_field(DeviceIdentifier const&, u32 field);
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u16 read16_field(DeviceIdentifier const&, u32 field);
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u32 read32_field(DeviceIdentifier const&, u32 field);
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// FIXME: Remove this once we can use PCI::Capability with inline buffer
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// so we don't need this method
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DeviceIdentifier const& get_device_identifier(Address address) const;
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Spinlock<LockRank::None> const& scan_lock() const { return m_scan_lock; }
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RecursiveSpinlock<LockRank::None> const& access_lock() const { return m_access_lock; }
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ErrorOr<void> add_host_controller_and_scan_for_devices(NonnullOwnPtr<HostController>);
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private:
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u8 read8_field(DeviceIdentifier const&, RegisterOffset field);
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u16 read16_field(DeviceIdentifier const&, RegisterOffset field);
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void add_host_controller(NonnullOwnPtr<HostController>);
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bool find_and_register_pci_host_bridges_from_acpi_mcfg_table(PhysicalAddress mcfg);
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Access();
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mutable RecursiveSpinlock<LockRank::None> m_access_lock {};
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mutable Spinlock<LockRank::None> m_scan_lock {};
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HashMap<u32, NonnullOwnPtr<PCI::HostController>> m_host_controllers;
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Vector<NonnullRefPtr<DeviceIdentifier>> m_device_identifiers;
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};
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}
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