mirror of
https://github.com/RGBCube/serenity
synced 2025-05-17 16:15:08 +00:00
ca32ee5714
Instead of getting the kernel commandline argument as function parameter we just take internally in the function.
79 lines
2 KiB
C++
79 lines
2 KiB
C++
/*
|
|
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/Arch/x86/IO.h>
|
|
#include <Kernel/Bus/PCI/API.h>
|
|
#include <Kernel/Bus/PCI/Access.h>
|
|
#include <Kernel/Bus/PCI/Initializer.h>
|
|
#include <Kernel/Bus/PCI/SysFSPCI.h>
|
|
#include <Kernel/CommandLine.h>
|
|
#include <Kernel/Firmware/ACPI/Parser.h>
|
|
#include <Kernel/Panic.h>
|
|
#include <Kernel/Sections.h>
|
|
|
|
namespace Kernel {
|
|
namespace PCI {
|
|
|
|
static bool test_pci_io();
|
|
|
|
UNMAP_AFTER_INIT static PCIAccessLevel detect_optimal_access_type()
|
|
{
|
|
auto boot_determined = kernel_command_line().pci_access_level();
|
|
if (!ACPI::is_enabled() || !ACPI::Parser::the()->find_table("MCFG").has_value())
|
|
return PCIAccessLevel::IOAddressing;
|
|
|
|
if (boot_determined != PCIAccessLevel::IOAddressing)
|
|
return boot_determined;
|
|
|
|
if (test_pci_io())
|
|
return PCIAccessLevel::IOAddressing;
|
|
|
|
PANIC("No PCI bus access method detected!");
|
|
}
|
|
|
|
UNMAP_AFTER_INIT void initialize()
|
|
{
|
|
switch (detect_optimal_access_type()) {
|
|
case PCIAccessLevel::MemoryAddressing: {
|
|
auto mcfg = ACPI::Parser::the()->find_table("MCFG");
|
|
VERIFY(mcfg.has_value());
|
|
auto success = Access::initialize_for_memory_access(mcfg.value());
|
|
VERIFY(success);
|
|
break;
|
|
}
|
|
case PCIAccessLevel::IOAddressing: {
|
|
auto success = Access::initialize_for_io_access();
|
|
VERIFY(success);
|
|
break;
|
|
}
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
|
|
PCI::PCIBusSysFSDirectory::initialize();
|
|
|
|
PCI::enumerate([&](DeviceIdentifier const& device_identifier) {
|
|
dmesgln("{} {}", device_identifier.address(), device_identifier.hardware_id());
|
|
});
|
|
}
|
|
|
|
UNMAP_AFTER_INIT bool test_pci_io()
|
|
{
|
|
dmesgln("Testing PCI via manual probing...");
|
|
u32 tmp = 0x80000000;
|
|
IO::out32(PCI::address_port, tmp);
|
|
tmp = IO::in32(PCI::address_port);
|
|
if (tmp == 0x80000000) {
|
|
dmesgln("PCI IO supported");
|
|
return true;
|
|
}
|
|
|
|
dmesgln("PCI IO not supported");
|
|
return false;
|
|
}
|
|
|
|
}
|
|
}
|