remove references to cpu_*_map in arch/
[linux-2.6.git] / arch / um / kernel / skas / process.c
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
13 int new_mm(unsigned long stack)
14 {
15         int fd, err;
16
17         fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0);
18         if (fd < 0)
19                 return fd;
20
21         if (skas_needs_stub) {
22                 err = map_stub_pages(fd, STUB_CODE, STUB_DATA, stack);
23                 if (err) {
24                         os_close_file(fd);
25                         return err;
26                 }
27         }
28
29         return fd;
30 }
31
32 extern void start_kernel(void);
33
34 static int __init start_kernel_proc(void *unused)
35 {
36         int pid;
37
38         block_signals();
39         pid = os_getpid();
40
41         cpu_tasks[0].pid = pid;
42         cpu_tasks[0].task = current;
43 #ifdef CONFIG_SMP
44         init_cpu_online(get_cpu_mask(0));
45 #endif
46         start_kernel();
47         return 0;
48 }
49
50 extern int userspace_pid[];
51
52 extern char cpu0_irqstack[];
53
54 int __init start_uml(void)
55 {
56         stack_protections((unsigned long) &cpu0_irqstack);
57         set_sigstack(cpu0_irqstack, THREAD_SIZE);
58         if (proc_mm) {
59                 userspace_pid[0] = start_userspace(0);
60                 if (userspace_pid[0] < 0) {
61                         printf("start_uml - start_userspace returned %d\n",
62                                userspace_pid[0]);
63                         exit(1);
64                 }
65         }
66
67         init_new_thread_signals();
68
69         init_task.thread.request.u.thread.proc = start_kernel_proc;
70         init_task.thread.request.u.thread.arg = NULL;
71         return start_idle_thread(task_stack_page(&init_task),
72                                  &init_task.thread.switch_buf);
73 }
74
75 unsigned long current_stub_stack(void)
76 {
77         if (current->mm == NULL)
78                 return 0;
79
80         return current->mm->context.id.stack;
81 }