void init_multitasking()
{
printk(KERN_DEBUG, "[sched]: Starting multitasking system...\n");
/* make the kernel task */
task_t *task = task_create();
task->pid = next_pid++;
task->pd = (page_dir_t *)kernel_dir;
task->stack_end=STACK_LOCATION;
task->priority = 1;
task->cpu = primary_cpu;
task->thread = thread_data_create();
/* alarm_mutex is aquired inside a kernel tick, so we may not schedule. */
alarm_mutex = mutex_create(0, MT_NOSCHED);
kill_queue = ll_create(0);
primary_queue = tqueue_create(0, 0);
primary_cpu->active_queue = tqueue_create(0, 0);
tqueue_insert(primary_queue, (void *)task, task->listnode);
tqueue_insert(primary_cpu->active_queue, (void *)task, task->activenode);
primary_cpu->cur = task;
primary_cpu->ktask = task;
primary_cpu->numtasks=1;
/* make this the "current_task" by assigning a specific location
* in the page directory as the pointer to the task. */
arch_specific_set_current_task((addr_t *)kernel_dir, (addr_t)task);
kernel_task = task;
/* this is the final thing to allow the system to begin scheduling
* once interrupts are enabled */
primary_cpu->flags |= CPU_TASK;
add_atomic(&running_processes, 1);
#if CONFIG_MODULES
add_kernel_symbol(delay);
add_kernel_symbol(delay_sleep);
add_kernel_symbol(schedule);
add_kernel_symbol(run_scheduler);
add_kernel_symbol(exit);
add_kernel_symbol(sys_setsid);
add_kernel_symbol(do_fork);
add_kernel_symbol(kill_task);
add_kernel_symbol(do_send_signal);
add_kernel_symbol(dosyscall);
add_kernel_symbol(task_pause);
add_kernel_symbol(task_resume);
add_kernel_symbol(got_signal);
#if CONFIG_SMP
add_kernel_symbol(get_cpu);
#endif
_add_kernel_symbol((addr_t)(task_t **)&kernel_task, "kernel_task");
#endif
}
void tm_init_multitasking(void)
{
printk(KERN_DEBUG, "[sched]: Starting multitasking system...\n");
sysgate_page = mm_physical_allocate(PAGE_SIZE, true);
mm_physical_memcpy((void *)sysgate_page,
(void *)signal_return_injector, MEMMAP_SYSGATE_ADDRESS_SIZE, PHYS_MEMCPY_MODE_DEST);
process_table = hash_create(0, 0, 128);
process_list = linkedlist_create(0, LINKEDLIST_MUTEX);
mutex_create(&process_refs_lock, 0);
mutex_create(&thread_refs_lock, 0);
thread_table = hash_create(0, 0, 128);
struct thread *thread = kmalloc(sizeof(struct thread));
struct process *proc = kernel_process = kmalloc(sizeof(struct process));
proc->refs = 2;
thread->refs = 1;
hash_insert(process_table, &proc->pid, sizeof(proc->pid), &proc->hash_elem, proc);
hash_insert(thread_table, &thread->tid, sizeof(thread->tid), &thread->hash_elem, thread);
linkedlist_insert(process_list, &proc->listnode, proc);
valloc_create(&proc->mmf_valloc, MEMMAP_MMAP_BEGIN, MEMMAP_MMAP_END, PAGE_SIZE, 0);
linkedlist_create(&proc->threadlist, 0);
mutex_create(&proc->map_lock, 0);
mutex_create(&proc->stacks_lock, 0);
mutex_create(&proc->fdlock, 0);
hash_create(&proc->files, HASH_LOCKLESS, 64);
proc->magic = PROCESS_MAGIC;
blocklist_create(&proc->waitlist, 0, "process-waitlist");
mutex_create(&proc->fdlock, 0);
memcpy(&proc->vmm_context, &kernel_context, sizeof(kernel_context));
thread->process = proc; /* we have to do this early, so that the vmm system can use the lock... */
thread->state = THREADSTATE_RUNNING;
thread->magic = THREAD_MAGIC;
workqueue_create(&thread->resume_work, 0);
thread->kernel_stack = (addr_t)&initial_kernel_stack;
spinlock_create(&thread->status_lock);
primary_cpu->active_queue = tqueue_create(0, 0);
primary_cpu->idle_thread = thread;
primary_cpu->numtasks=1;
ticker_create(&primary_cpu->ticker, 0);
workqueue_create(&primary_cpu->work, 0);
tm_thread_add_to_process(thread, proc);
tm_thread_add_to_cpu(thread, primary_cpu);
atomic_fetch_add_explicit(&running_processes, 1, memory_order_relaxed);
atomic_fetch_add_explicit(&running_threads, 1, memory_order_relaxed);
set_ksf(KSF_THREADING);
*(struct thread **)(thread->kernel_stack) = thread;
primary_cpu->flags |= CPU_RUNNING;
#if CONFIG_MODULES
loader_add_kernel_symbol(tm_thread_delay_sleep);
loader_add_kernel_symbol(tm_thread_delay);
loader_add_kernel_symbol(tm_timing_get_microseconds);
loader_add_kernel_symbol(tm_thread_set_state);
loader_add_kernel_symbol(tm_thread_exit);
loader_add_kernel_symbol(tm_thread_poke);
loader_add_kernel_symbol(tm_thread_block);
loader_add_kernel_symbol(tm_thread_got_signal);
loader_add_kernel_symbol(tm_thread_unblock);
loader_add_kernel_symbol(tm_blocklist_wakeall);
loader_add_kernel_symbol(kthread_create);
loader_add_kernel_symbol(kthread_wait);
loader_add_kernel_symbol(kthread_join);
loader_add_kernel_symbol(kthread_kill);
loader_add_kernel_symbol(tm_schedule);
loader_add_kernel_symbol(arch_tm_get_current_thread);
#endif
}
