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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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