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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/CommandLine.h>
#include <Kernel/Panic.h>
#include <Kernel/StdLib.h>
namespace Kernel {
static char s_cmd_line[1024];
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);
}
UNMAP_AFTER_INIT CommandLine::CommandLine(const String& string)
: m_string(string)
{
s_the = this;
const auto& args = m_string.split(' ');
m_params.ensure_capacity(args.size());
for (auto&& str : args) {
if (str == "") {
continue;
}
auto pair = str.split_limit('=', 2);
if (pair.size() == 1) {
m_params.set(move(pair[0]), "");
} else {
m_params.set(move(pair[0]), move(pair[1]));
}
}
}
Optional<String> CommandLine::lookup(const String& key) const
{
return m_params.get(key);
}
bool CommandLine::contains(const String& key) const
{
return m_params.contains(key);
}
UNMAP_AFTER_INIT bool CommandLine::is_boot_profiling_enabled() const
{
return contains("boot_prof");
}
UNMAP_AFTER_INIT bool CommandLine::is_ide_enabled() const
{
return !contains("disable_ide");
}
UNMAP_AFTER_INIT bool CommandLine::is_smp_enabled() const
{
return lookup("smp").value_or("off") == "on";
}
UNMAP_AFTER_INIT bool CommandLine::is_vmmouse_enabled() const
{
return lookup("vmmouse").value_or("on") == "on";
}
UNMAP_AFTER_INIT PCIAccessLevel CommandLine::pci_access_level() const
{
auto value = lookup("pci_ecam").value_or("on");
if (value == "on")
return PCIAccessLevel::MappingPerBus;
if (value == "per-device")
return PCIAccessLevel::MappingPerDevice;
if (value == "off")
return PCIAccessLevel::IOAddressing;
PANIC("Unknown PCI ECAM setting: {}", value);
}
UNMAP_AFTER_INIT bool CommandLine::is_legacy_time_enabled() const
{
return lookup("time").value_or("modern") == "legacy";
}
UNMAP_AFTER_INIT bool CommandLine::is_force_pio() const
{
return contains("force_pio");
}
UNMAP_AFTER_INIT String CommandLine::root_device() const
{
return lookup("root").value_or("/dev/hda");
}
UNMAP_AFTER_INIT AcpiFeatureLevel CommandLine::acpi_feature_level() const
{
auto value = kernel_command_line().lookup("acpi").value_or("on");
if (value == "limited")
return AcpiFeatureLevel::Limited;
if (value == "off")
return AcpiFeatureLevel::Disabled;
return AcpiFeatureLevel::Enabled;
}
UNMAP_AFTER_INIT HPETMode CommandLine::hpet_mode() const
{
auto hpet_mode = lookup("hpet").value_or("periodic");
if (hpet_mode == "periodic")
return HPETMode::Periodic;
if (hpet_mode == "nonperiodic")
return HPETMode::NonPeriodic;
PANIC("Unknown HPETMode: {}", hpet_mode);
}
UNMAP_AFTER_INIT AHCIResetMode CommandLine::ahci_reset_mode() const
{
const auto ahci_reset_mode = lookup("ahci_reset_mode").value_or("controller");
if (ahci_reset_mode == "controller") {
return AHCIResetMode::ControllerOnly;
} else if (ahci_reset_mode == "none") {
return AHCIResetMode::None;
} else if (ahci_reset_mode == "complete") {
return AHCIResetMode::Complete;
}
PANIC("Unknown AHCIResetMode: {}", ahci_reset_mode);
}
UNMAP_AFTER_INIT BootMode CommandLine::boot_mode() const
{
const auto boot_mode = lookup("boot_mode").value_or("graphical");
if (boot_mode == "text") {
return BootMode::Text;
} else if (boot_mode == "self-test") {
return BootMode::SelfTest;
} else if (boot_mode == "graphical") {
return BootMode::Graphical;
}
PANIC("Unknown BootMode: {}", boot_mode);
}
UNMAP_AFTER_INIT bool CommandLine::is_text_mode() const
{
const auto mode = boot_mode();
return mode == BootMode::Text || mode == BootMode::SelfTest;
}
String CommandLine::userspace_init() const
{
return lookup("init").value_or("/bin/SystemServer");
}
Vector<String> CommandLine::userspace_init_args() const
{
auto init_args = lookup("init_args").value_or("").split(',');
if (!init_args.is_empty())
init_args.prepend(userspace_init());
return init_args;
}
}
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