serenity/Kernel/Bus/PCI/DeviceTreeInitializer.cpp

/*
 * Copyright (c) 2023, Sönke Holz <[email protected]>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <AK/SetOnce.h>
#include <Kernel/Boot/CommandLine.h>
#include <Kernel/Bus/PCI/API.h>
#include <Kernel/Bus/PCI/Access.h>
#include <Kernel/Bus/PCI/Initializer.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Bus/PCI/BusDirectory.h>

namespace Kernel::PCI {

SetOnce g_pci_access_io_probe_failed;
SetOnce g_pci_access_is_disabled_from_commandline;

void initialize()
{
    if (kernel_command_line().is_pci_disabled()) {
        g_pci_access_is_disabled_from_commandline.set();
        return;
    }

    // Host controllers defined in the devicetree are added before PCI::initialize() is called.

    Access::the().rescan_hardware();

    PCIBusSysFSDirectory::initialize();

    // FIXME: X86_64 Reserves Interrupts here, maybe we need to do something like this here as well

    MUST(PCI::enumerate([&](DeviceIdentifier const& device_identifier) {
        dmesgln("{} {}", device_identifier.address(), device_identifier.hardware_id());
    }));
}

}