1/*
2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __KERN_UTIL_H__
7#define __KERN_UTIL_H__
8
9#include <sysdep/ptrace.h>
10#include <sysdep/faultinfo.h>
11
12struct siginfo;
13
14extern int uml_exitcode;
15
16extern int ncpus;
17extern int kmalloc_ok;
18
19#define UML_ROUND_UP(addr) \
20	((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK)
21
22extern unsigned long alloc_stack(int order, int atomic);
23extern void free_stack(unsigned long stack, int order);
24
25extern int do_signal(void);
26extern void interrupt_end(void);
27extern void relay_signal(int sig, struct siginfo *si, struct uml_pt_regs *regs);
28
29extern unsigned long segv(struct faultinfo fi, unsigned long ip,
30			  int is_user, struct uml_pt_regs *regs);
31extern int handle_page_fault(unsigned long address, unsigned long ip,
32			     int is_write, int is_user, int *code_out);
33
34extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs);
35extern int smp_sigio_handler(void);
36extern void initial_thread_cb(void (*proc)(void *), void *arg);
37extern int is_syscall(unsigned long addr);
38
39extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
40
41extern int start_uml(void);
42extern void paging_init(void);
43
44extern void uml_cleanup(void);
45extern void do_uml_exitcalls(void);
46
47/*
48 * Are we disallowed to sleep? Used to choose between GFP_KERNEL and
49 * GFP_ATOMIC.
50 */
51extern int __cant_sleep(void);
52extern int get_current_pid(void);
53extern int copy_from_user_proc(void *to, void *from, int size);
54extern int cpu(void);
55extern char *uml_strdup(const char *string);
56
57extern unsigned long to_irq_stack(unsigned long *mask_out);
58extern unsigned long from_irq_stack(int nested);
59
60extern void syscall_trace(struct uml_pt_regs *regs, int entryexit);
61extern int singlestepping(void *t);
62
63extern void segv_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
64extern void bus_handler(int sig, struct siginfo *si, struct uml_pt_regs *regs);
65extern void winch(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
66extern void fatal_sigsegv(void) __attribute__ ((noreturn));
67
68
69#endif
70