mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-27 10:00:24 +00:00
613cfb31b1
Using the walk_device_tree helper, we can walk the device tree from the beginning looking for a specific property node. It's still missing the ability to get property lists, string lists, and property-specific data.
49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
/*
|
|
* Copyright (c) 2021, Andrew Kaster <akaster@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/DeprecatedString.h>
|
|
#include <LibCore/ArgsParser.h>
|
|
#include <LibCore/MappedFile.h>
|
|
#include <LibCore/System.h>
|
|
#include <LibDeviceTree/FlattenedDeviceTree.h>
|
|
#include <LibDeviceTree/Validation.h>
|
|
#include <LibMain/Main.h>
|
|
|
|
ErrorOr<int> serenity_main(Main::Arguments arguments)
|
|
{
|
|
TRY(Core::System::pledge("stdio rpath"));
|
|
|
|
DeprecatedString filename;
|
|
|
|
Core::ArgsParser args;
|
|
args.add_positional_argument(filename, "File to process", "file", Core::ArgsParser::Required::Yes);
|
|
args.parse(arguments);
|
|
|
|
// FIXME: Figure out how to do this sanely from stdin
|
|
auto file = TRY(Core::MappedFile::map(filename));
|
|
|
|
if (file->size() < sizeof(DeviceTree::FlattenedDeviceTreeHeader)) {
|
|
warnln("Not enough data in {} to contain a device tree header!", filename);
|
|
return 1;
|
|
}
|
|
|
|
auto const* fdt_header = reinterpret_cast<DeviceTree::FlattenedDeviceTreeHeader const*>(file->data());
|
|
auto bytes = ReadonlyBytes { file->data(), file->size() };
|
|
|
|
TRY(DeviceTree::dump(*fdt_header, bytes));
|
|
|
|
auto compatible = TRY(DeviceTree::slow_get_property<StringView>("/compatible"sv, *fdt_header, bytes));
|
|
auto compatible_strings = compatible.split_view('\0');
|
|
dbgln("compatible with: {}", compatible_strings);
|
|
|
|
auto bootargs = TRY(DeviceTree::slow_get_property<StringView>("/chosen/bootargs"sv, *fdt_header, bytes));
|
|
dbgln("bootargs: {}", bootargs);
|
|
|
|
auto cpu_compatible = TRY(DeviceTree::slow_get_property<StringView>("/cpus/cpu@0/compatible"sv, *fdt_header, bytes));
|
|
dbgln("cpu0 compatible: {}", cpu_compatible);
|
|
|
|
return 0;
|
|
}
|