apio
4a654bf093
Use a separate task to do it.
Also fix a bug where the init thread would get no kernel stack ever since 5f698b477.
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
#include "Log.h"
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#include "arch/CPU.h"
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#include "arch/Timer.h"
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#include "binfmt/BinaryFormat.h"
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#include "boot/Init.h"
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#include "config.h"
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#include "fs/InitRD.h"
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#include "fs/devices/DeviceRegistry.h"
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#include "fs/tmpfs/FileSystem.h"
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#include "memory/MemoryManager.h"
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#include "thread/Scheduler.h"
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#include <luna/Units.h>
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#ifdef ARCH_X86_64
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#include "arch/x86_64/disk/ATA.h"
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#endif
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extern void set_host_name(StringView);
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void reap_thread()
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{
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while (true)
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{
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CPU::disable_interrupts();
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auto dying_threads = Scheduler::check_for_dying_threads();
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CPU::enable_interrupts();
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dying_threads.consume([](Thread* thread) { Scheduler::reap_thread(thread); });
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kernel_wait_for_event();
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}
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}
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void oom_thread()
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{
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while (true)
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{
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kernel_wait_for_event();
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// OOM! Do everything we can to recover memory.
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StorageCache::clear_caches();
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}
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}
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[[noreturn]] void init()
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{
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{
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kinfoln("Starting Moon %s %s", MOON_VERSION, MOON_RELEASE);
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// Default hostname if nobody from userspace changes it
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set_host_name("moon"_sv);
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kinfoln("Current platform: %s", CPU::platform_string().chars());
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kinfoln("Current processor: %s", CPU::identify().value_or("(unknown)"_sv).chars());
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auto root = mark_critical(TmpFS::FileSystem::create(), "Failed to create initial ramfs");
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mark_critical(VFS::mount_root(root), "Failed to mount the initial ramfs as the root filesystem");
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mark_critical(InitRD::populate_vfs(), "Failed to load files from the initial ramdisk");
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mark_critical(DeviceRegistry::init(), "Failed to register initial devices");
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mark_critical(BinaryFormat::init(), "Failed to register initial binary formats");
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auto init =
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mark_critical(VFS::resolve_path("/bin/preinit", Credentials {}), "Can't find init in the initial ramfs!");
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auto init_thread = mark_critical(Scheduler::new_userspace_thread(init, "/bin/preinit"),
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"Failed to create PID 1 process for init");
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auto reap = mark_critical(Scheduler::new_kernel_thread(reap_thread, "[reap]"),
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"Failed to create the process reaper kernel thread");
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Scheduler::set_reap_thread(reap);
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auto oom = mark_critical(Scheduler::new_kernel_thread(oom_thread, "[oom]"),
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"Failed to create the out-of-memory kernel thread");
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Scheduler::set_oom_thread(oom);
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#ifdef ARCH_X86_64
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ATA::Controller::scan();
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#endif
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// Disable console logging before transferring control to userspace.
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setup_log(log_debug_enabled(), log_serial_enabled(), false);
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init_thread->wake_up();
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}
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kernel_exit();
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}
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extern "C" [[noreturn]] void _start()
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{
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Init::check_magic();
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Init::early_init();
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Timer::init();
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Thread::init();
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Scheduler::init();
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Scheduler::new_kernel_thread(init, "[kinit]");
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CPU::platform_finish_init();
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CPU::enable_interrupts();
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CPU::idle_loop();
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}
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