2660663ff2
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/*
|
|
* Copyright (C) 2006 Atmark Techno, Inc.
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#ifndef _ASM_MICROBLAZE_UACCESS_H
|
|
#define _ASM_MICROBLAZE_UACCESS_H
|
|
|
|
#ifdef __KERNEL__
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h> /* RLIMIT_FSIZE */
|
|
#include <linux/mm.h>
|
|
|
|
#include <asm/mmu.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/segment.h>
|
|
#include <linux/string.h>
|
|
|
|
#define VERIFY_READ 0
|
|
#define VERIFY_WRITE 1
|
|
|
|
extern int ___range_ok(unsigned long addr, unsigned long size);
|
|
|
|
#define __range_ok(addr, size) \
|
|
___range_ok((unsigned long)(addr), (unsigned long)(size))
|
|
|
|
#define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0)
|
|
#define __access_ok(add, size) (__range_ok((addr), (size)) == 0)
|
|
|
|
extern inline int bad_user_access_length(void)
|
|
{
|
|
return 0;
|
|
}
|
|
/* FIXME this is function for optimalization -> memcpy */
|
|
#define __get_user(var, ptr) \
|
|
({ \
|
|
int __gu_err = 0; \
|
|
switch (sizeof(*(ptr))) { \
|
|
case 1: \
|
|
case 2: \
|
|
case 4: \
|
|
(var) = *(ptr); \
|
|
break; \
|
|
case 8: \
|
|
memcpy((void *) &(var), (ptr), 8); \
|
|
break; \
|
|
default: \
|
|
(var) = 0; \
|
|
__gu_err = __get_user_bad(); \
|
|
break; \
|
|
} \
|
|
__gu_err; \
|
|
})
|
|
|
|
#define __get_user_bad() (bad_user_access_length(), (-EFAULT))
|
|
|
|
#define __put_user(var, ptr) \
|
|
({ \
|
|
int __pu_err = 0; \
|
|
switch (sizeof(*(ptr))) { \
|
|
case 1: \
|
|
case 2: \
|
|
case 4: \
|
|
*(ptr) = (var); \
|
|
break; \
|
|
case 8: { \
|
|
typeof(*(ptr)) __pu_val = var; \
|
|
memcpy(ptr, &__pu_val, sizeof(__pu_val));\
|
|
} \
|
|
break; \
|
|
default: \
|
|
__pu_err = __put_user_bad(); \
|
|
break; \
|
|
} \
|
|
__pu_err; \
|
|
})
|
|
|
|
#define __put_user_bad() (bad_user_access_length(), (-EFAULT))
|
|
|
|
#define put_user(x, ptr) __put_user(x, ptr)
|
|
#define get_user(x, ptr) __get_user(x, ptr)
|
|
|
|
#define copy_to_user(to, from, n) (memcpy(to, from, n), 0)
|
|
#define copy_from_user(to, from, n) (memcpy(to, from, n), 0)
|
|
|
|
#define __copy_to_user(to, from, n) (copy_to_user(to, from, n))
|
|
#define __copy_from_user(to, from, n) (copy_from_user(to, from, n))
|
|
#define __copy_to_user_inatomic(to, from, n) (__copy_to_user(to, from, n))
|
|
#define __copy_from_user_inatomic(to, from, n) (__copy_from_user(to, from, n))
|
|
|
|
#define __clear_user(addr, n) (memset((void *)addr, 0, n), 0)
|
|
|
|
static inline unsigned long clear_user(void *addr, unsigned long size)
|
|
{
|
|
if (access_ok(VERIFY_WRITE, addr, size))
|
|
size = __clear_user(addr, size);
|
|
return size;
|
|
}
|
|
|
|
/* Returns 0 if exception not found and fixup otherwise. */
|
|
extern unsigned long search_exception_table(unsigned long);
|
|
|
|
|
|
extern long strncpy_from_user(char *dst, const char __user *src, long count);
|
|
extern long strnlen_user(const char __user *src, long count);
|
|
extern long __strncpy_from_user(char *dst, const char __user *src, long count);
|
|
|
|
/*
|
|
* The exception table consists of pairs of addresses: the first is the
|
|
* address of an instruction that is allowed to fault, and the second is
|
|
* the address at which the program should continue. No registers are
|
|
* modified, so it is entirely up to the continuation code to figure out
|
|
* what to do.
|
|
*
|
|
* All the routines below use bits of fixup code that are out of line
|
|
* with the main instruction path. This means when everything is well,
|
|
* we don't even have to jump over them. Further, they do not intrude
|
|
* on our cache or tlb entries.
|
|
*/
|
|
struct exception_table_entry {
|
|
unsigned long insn, fixup;
|
|
};
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _ASM_MICROBLAZE_UACCESS_H */
|