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#include "kapi/boot_modules.hpp"
#include "kapi/cio.hpp"
#include "kapi/cpu.hpp"
#include "kapi/devices.hpp"
#include "kapi/interrupts.hpp"
#include "kapi/memory.hpp"
#include "kapi/system.hpp"
#include "kernel/devices/storage/management.hpp"
#include "kernel/filesystem/device_inode.hpp"
#include "kernel/filesystem/file_descriptor_table.hpp"
#include "kernel/filesystem/filesystem.hpp"
#include "kernel/filesystem/open_file_description.hpp"
#include "kernel/filesystem/vfs.hpp"
#include "kernel/memory.hpp"
#include <kstd/format>
#include <kstd/memory>
#include <kstd/os/error.hpp>
#include <kstd/print>
#include <kstd/units>
#include <kstd/vector>
#include <algorithm>
#include <cstddef>
using namespace kstd::units_literals;
auto test_device_names() -> void
{
auto storage_mgmt = kernel::devices::storage::management::get();
std::ranges::for_each(storage_mgmt.all_controllers(), [](auto const & controller) {
std::ranges::for_each(controller->all_devices(),
[](auto const & device) { kstd::println("{}", device->name().view()); });
});
}
auto test_file_description_manually() -> void
{
// setup
auto fd_table = kernel::filesystem::file_descriptor_table::get();
auto storage_mgmt = kernel::devices::storage::management::get();
auto device = storage_mgmt.device_by_major_minor(1, 0);
auto dev_node = kstd::make_shared<kernel::filesystem::device_inode>(device);
auto ofd = kstd::make_shared<kernel::filesystem::open_file_description>(dev_node);
auto fd_index = fd_table.add_file(ofd);
// use: read two bytes and write two again
auto fd = fd_table.get_file(fd_index);
if (!fd)
{
kstd::os::panic("test code failed");
}
kstd::vector<std::byte> buffer{2};
auto number_of_read_bytes = fd->read(buffer.data(), buffer.size());
kstd::println("read bytes: {}", number_of_read_bytes);
kstd::println("buffer: {::#04x}", buffer);
// write half of the file new
auto const value1 = std::byte{0xAA};
auto const value2 = std::byte{0xBB};
kstd::vector<std::byte> write_buffer{value1, value2};
auto written_bytes = fd->write(write_buffer.data(), write_buffer.size());
kstd::println("written bytes: {}", written_bytes);
fd_table.remove_file(fd_index);
// use: read four bytes again -> two old bytes two new bytes
auto ofd1 = kstd::make_shared<kernel::filesystem::open_file_description>(dev_node);
fd_index = fd_table.add_file(ofd1);
auto fd1 = fd_table.get_file(fd_index);
if (!fd1)
{
kstd::os::panic("test code failed");
}
kstd::vector<std::byte> buffer1{4};
number_of_read_bytes = fd1->read(buffer1.data(), buffer1.size());
kstd::println("read bytes: {}", number_of_read_bytes);
kstd::println("buffer: {::#04x}", buffer1);
}
auto test_device_with_vfs() -> void
{
// TODO BA-FS26
auto vfs = kernel::filesystem::vfs::get();
auto ofd = vfs.open("/dev/ram0");
if (!ofd)
{
kstd::os::panic("test code failed");
}
auto fd_table = kernel::filesystem::file_descriptor_table::get();
auto fd = fd_table.add_file(ofd);
kstd::vector<std::byte> buffer{2};
auto file = fd_table.get_file(fd);
if (!file)
{
kstd::os::panic("test code failed");
}
auto number_of_read_bytes = file->read(buffer.data(), buffer.size());
kstd::println("read bytes: {}", number_of_read_bytes);
kstd::println("buffer: {::#04x}", buffer);
}
auto test_file_lookup() -> void
{
// TODO BA-FS26 implement a more complete test with multiple files and directories and mounts etc.
auto vfs = kernel::filesystem::vfs::get();
auto storage_mgmt = kernel::devices::storage::management::get();
auto ofd1 = vfs.open("/a/b/c");
auto ofd2 = vfs.open("/dev/ram0");
auto ofd3 = vfs.open("/a/d/e");
if (!ofd1 || !ofd2 || !ofd3)
{
kstd::os::panic("test code failed");
}
if (auto ofd4 = vfs.open("/dev/xxx"))
{
kstd::os::panic("test code failed");
}
auto device = storage_mgmt.device_by_major_minor(1, 16);
auto new_filesystem = kernel::filesystem::filesystem::probe_and_mount(device);
if (vfs.do_mount("/a/b", new_filesystem) != 0)
{
kstd::os::panic("test code failed");
}
auto ofd5 = vfs.open("/a/b/c");
if (!ofd5)
{
kstd::os::panic("test code failed");
}
if (auto ofd6 = vfs.open("x/y/z"))
{
kstd::os::panic("test code failed");
}
}
auto run_test_code() -> void
{
kstd::println("[TEST] Running test code...");
kstd::println("[TEST] device names");
test_device_names();
kstd::println("---------------------------------");
kstd::println("[TEST] file description manually");
test_file_description_manually();
kstd::println("---------------------------------");
kstd::println("[TEST] device with VFS");
test_device_with_vfs();
kstd::println("---------------------------------");
kstd::println("[TEST] file lookup");
test_file_lookup();
kstd::println("---------------------------------");
}
auto main() -> int
{
kapi::cio::init();
kstd::println("[OS] IO subsystem initialized.");
kapi::cpu::init();
kapi::memory::init();
kernel::memory::init_heap(kapi::memory::heap_base);
kapi::system::memory_initialized();
kapi::memory::init_mmio(kapi::memory::mmio_base, 1_GiB / kapi::memory::page::size);
kstd::println("[OS] Memory subsystem initialized.");
kapi::devices::init();
kstd::println("[OS] System root bus initialized.");
kapi::devices::init_platform_devices();
kstd::println("[OS] Platform devices initialized.");
kapi::interrupts::enable();
kstd::println("[OS] Interrupts enabled.");
kapi::boot_modules::init();
kstd::println("[OS] Boot module registry initialized.");
kernel::devices::storage::management::init();
kstd::println("[OS] Storage management initialized.");
kernel::filesystem::file_descriptor_table::init();
kstd::println("[OS] Global file descriptor table initialized.");
kernel::filesystem::vfs::init();
kstd::println("[OS] Virtual filesystem initialized.");
run_test_code();
kstd::println("[TEST] All tests completed.");
kapi::system::panic("Returning from kernel main!");
}
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