1/*
2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6#include <linux/init.h>
7#include <linux/sched.h>
8#include <as-layout.h>
9#include <kern.h>
10#include <os.h>
11#include <skas.h>
12
13extern void start_kernel(void);
14
15static int __init start_kernel_proc(void *unused)
16{
17	int pid;
18
19	block_signals();
20	pid = os_getpid();
21
22	cpu_tasks[0].pid = pid;
23	cpu_tasks[0].task = current;
24
25	start_kernel();
26	return 0;
27}
28
29extern int userspace_pid[];
30
31extern char cpu0_irqstack[];
32
33int __init start_uml(void)
34{
35	stack_protections((unsigned long) &cpu0_irqstack);
36	set_sigstack(cpu0_irqstack, THREAD_SIZE);
37
38	init_new_thread_signals();
39
40	init_task.thread.request.u.thread.proc = start_kernel_proc;
41	init_task.thread.request.u.thread.arg = NULL;
42	return start_idle_thread(task_stack_page(&init_task),
43				 &init_task.thread.switch_buf);
44}
45
46unsigned long current_stub_stack(void)
47{
48	if (current->mm == NULL)
49		return 0;
50
51	return current->mm->context.id.stack;
52}
53