1/*
2 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __TT_UACCESS_H
7#define __TT_UACCESS_H
8
9#include "linux/string.h"
10#include "linux/sched.h"
11#include "asm/processor.h"
12#include "asm/errno.h"
13#include "asm/current.h"
14#include "asm/a.out.h"
15#include "uml_uaccess.h"
16
17#define ABOVE_KMEM (16 * 1024 * 1024)
18
19extern unsigned long end_vm;
20extern unsigned long uml_physmem;
21
22#define is_stack(addr, size) \
23	(((unsigned long) (addr) < STACK_TOP) && \
24	 ((unsigned long) (addr) >= STACK_TOP - ABOVE_KMEM) && \
25	 (((unsigned long) (addr) + (size)) <= STACK_TOP))
26
27#define access_ok_tt(type, addr, size) \
28	(is_stack(addr, size))
29
30extern int __do_copy_from_user(void *to, const void *from, int n,
31			       void **fault_addr, void **fault_catcher);
32extern int __do_strncpy_from_user(char *dst, const char *src, size_t n,
33				  void **fault_addr, void **fault_catcher);
34extern int __do_clear_user(void *mem, size_t len, void **fault_addr,
35			   void **fault_catcher);
36extern int __do_strnlen_user(const char *str, unsigned long n,
37			     void **fault_addr, void **fault_catcher);
38
39extern int copy_from_user_tt(void *to, const void __user *from, int n);
40extern int copy_to_user_tt(void __user *to, const void *from, int n);
41extern int strncpy_from_user_tt(char *dst, const char __user *src, int count);
42extern int __clear_user_tt(void __user *mem, int len);
43extern int clear_user_tt(void __user *mem, int len);
44extern int strnlen_user_tt(const void __user *str, int len);
45
46#endif
47