ladybird/Kernel/CommandLine.cpp

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringBuilder.h>
#include <Kernel/CommandLine.h>
#include <Kernel/Panic.h>
#include <Kernel/Sections.h>
#include <Kernel/StdLib.h>
namespace Kernel {
static char s_cmd_line[1024];
static constexpr StringView s_embedded_cmd_line = "";
static CommandLine* s_the;
UNMAP_AFTER_INIT void CommandLine::early_initialize(const char* cmd_line)
{
if (!cmd_line)
return;
size_t length = strlen(cmd_line);
if (length >= sizeof(s_cmd_line))
length = sizeof(s_cmd_line) - 1;
memcpy(s_cmd_line, cmd_line, length);
s_cmd_line[length] = '\0';
}
const CommandLine& kernel_command_line()
{
VERIFY(s_the);
return *s_the;
}
UNMAP_AFTER_INIT void CommandLine::initialize()
{
VERIFY(!s_the);
s_the = new CommandLine(s_cmd_line);
dmesgln("Kernel Commandline: {}", kernel_command_line().string());
}
UNMAP_AFTER_INIT void CommandLine::build_commandline(const String& cmdline_from_bootloader)
{
StringBuilder builder;
builder.append(cmdline_from_bootloader);
if (!s_embedded_cmd_line.is_empty()) {
builder.append(" ");
builder.append(s_embedded_cmd_line);
}
m_string = builder.to_string();
}
UNMAP_AFTER_INIT void CommandLine::add_arguments(const Vector<StringView>& args)
{
for (auto&& str : args) {
if (str == ""sv) {
continue;
}
auto pair = str.split_view('=', false);
VERIFY(pair.size() == 2 || pair.size() == 1);
if (pair.size() == 1) {
m_params.set(move(pair[0]), ""sv);
} else {
m_params.set(move(pair[0]), move(pair[1]));
}
}
}
UNMAP_AFTER_INIT CommandLine::CommandLine(const String& cmdline_from_bootloader)
{
s_the = this;
build_commandline(cmdline_from_bootloader);
const auto& args = m_string.split_view(' ');
m_params.ensure_capacity(args.size());
add_arguments(args);
}
Optional<String> CommandLine::lookup(const StringView& key) const
{
return m_params.get(key);
}
bool CommandLine::contains(const StringView& key) const
{
return m_params.contains(key);
}
UNMAP_AFTER_INIT bool CommandLine::is_boot_profiling_enabled() const
{
return contains("boot_prof"sv);
}
UNMAP_AFTER_INIT bool CommandLine::is_ide_enabled() const
{
return !contains("disable_ide"sv);
}
UNMAP_AFTER_INIT bool CommandLine::is_smp_enabled() const
{
return lookup("smp"sv).value_or("off"sv) == "on"sv;
}
UNMAP_AFTER_INIT bool CommandLine::is_vmmouse_enabled() const
{
return lookup("vmmouse"sv).value_or("on") == "on"sv;
}
UNMAP_AFTER_INIT PCIAccessLevel CommandLine::pci_access_level() const
{
auto value = lookup("pci_ecam"sv).value_or("off"sv);
if (value == "on"sv)
return PCIAccessLevel::MappingPerBus;
if (value == "per-device"sv)
return PCIAccessLevel::MappingPerDevice;
if (value == "off"sv)
return PCIAccessLevel::IOAddressing;
PANIC("Unknown PCI ECAM setting: {}", value);
}
UNMAP_AFTER_INIT bool CommandLine::is_legacy_time_enabled() const
{
return lookup("time"sv).value_or("modern"sv) == "legacy"sv;
}
UNMAP_AFTER_INIT bool CommandLine::is_force_pio() const
{
return contains("force_pio"sv);
}
UNMAP_AFTER_INIT String CommandLine::root_device() const
{
return lookup("root"sv).value_or("/dev/hda"sv);
}
UNMAP_AFTER_INIT AcpiFeatureLevel CommandLine::acpi_feature_level() const
{
auto value = kernel_command_line().lookup("acpi"sv).value_or("on"sv);
if (value == "limited"sv)
return AcpiFeatureLevel::Limited;
if (value == "off"sv)
return AcpiFeatureLevel::Disabled;
return AcpiFeatureLevel::Enabled;
}
UNMAP_AFTER_INIT HPETMode CommandLine::hpet_mode() const
{
auto hpet_mode = lookup("hpet"sv).value_or("periodic"sv);
if (hpet_mode == "periodic"sv)
return HPETMode::Periodic;
if (hpet_mode == "nonperiodic"sv)
return HPETMode::NonPeriodic;
PANIC("Unknown HPETMode: {}", hpet_mode);
}
UNMAP_AFTER_INIT bool CommandLine::is_physical_networking_disabled() const
{
return contains("disable_physical_networking"sv);
}
UNMAP_AFTER_INIT bool CommandLine::disable_ps2_controller() const
{
return contains("disable_ps2_controller"sv);
}
UNMAP_AFTER_INIT bool CommandLine::disable_physical_storage() const
{
return contains("disable_physical_storage"sv);
}
UNMAP_AFTER_INIT bool CommandLine::disable_uhci_controller() const
{
return contains("disable_uhci_controller"sv);
}
UNMAP_AFTER_INIT bool CommandLine::disable_virtio() const
{
return contains("disable_virtio"sv);
}
UNMAP_AFTER_INIT AHCIResetMode CommandLine::ahci_reset_mode() const
{
const auto ahci_reset_mode = lookup("ahci_reset_mode"sv).value_or("controllers"sv);
if (ahci_reset_mode == "controllers"sv) {
return AHCIResetMode::ControllerOnly;
} else if (ahci_reset_mode == "aggressive"sv) {
return AHCIResetMode::Aggressive;
}
PANIC("Unknown AHCIResetMode: {}", ahci_reset_mode);
}
UNMAP_AFTER_INIT BootMode CommandLine::boot_mode() const
{
const auto boot_mode = lookup("boot_mode"sv).value_or("graphical"sv);
if (boot_mode == "no-fbdev"sv) {
return BootMode::NoFramebufferDevices;
} else if (boot_mode == "self-test"sv) {
return BootMode::SelfTest;
} else if (boot_mode == "graphical"sv) {
return BootMode::Graphical;
}
PANIC("Unknown BootMode: {}", boot_mode);
}
UNMAP_AFTER_INIT bool CommandLine::is_no_framebuffer_devices_mode() const
{
const auto mode = boot_mode();
return mode == BootMode::NoFramebufferDevices || mode == BootMode::SelfTest;
}
String CommandLine::userspace_init() const
{
return lookup("init"sv).value_or("/bin/SystemServer"sv);
}
Vector<String> CommandLine::userspace_init_args() const
{
auto init_args = lookup("init_args"sv).value_or(""sv).split(',');
if (!init_args.is_empty())
init_args.prepend(userspace_init());
return init_args;
}
UNMAP_AFTER_INIT size_t CommandLine::switch_to_tty() const
{
const auto default_tty = lookup("switch_to_tty"sv).value_or("1"sv);
auto switch_tty_number = default_tty.to_uint();
if (switch_tty_number.has_value() && switch_tty_number.value() >= 1) {
return switch_tty_number.value() - 1;
}
PANIC("Invalid default tty value: {}", default_tty);
}
}