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/*
* Copyright (C) 2008 Michal Simek
* Copyright (C) 2008 PetaLogix
* 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_SEGMENT_H
#define _ASM_MICROBLAZE_SEGMENT_H
#ifndef __ASSEMBLY__
typedef struct {
unsigned long seg;
} mm_segment_t;
/*
* On Microblaze the fs value is actually the top of the corresponding
* address space.
*
* The fs value determines whether argument validity checking should be
* performed or not. If get_fs() == USER_DS, checking is performed, with
* get_fs() == KERNEL_DS, checking is bypassed.
*
* For historical reasons, these macros are grossly misnamed.
*
* For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
*/
# define KERNEL_DS ((mm_segment_t){0})
# define USER_DS KERNEL_DS
# define get_ds() (KERNEL_DS)
# define get_fs() (current_thread_info()->addr_limit)
# define set_fs(x) \
do { current_thread_info()->addr_limit = (x); } while (0)
# define segment_eq(a, b) ((a).seg == (b).seg)
# endif /* __ASSEMBLY__ */
#endif /* _ASM_MICROBLAZE_SEGMENT_H */
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