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/* segment.h: MMU segment settings
*
* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _ASM_SEGMENT_H
#define _ASM_SEGMENT_H
#ifndef __ASSEMBLY__
typedef struct {
unsigned long seg;
} mm_segment_t;
#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
#ifdef CONFIG_MMU
#define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
#define KERNEL_DS MAKE_MM_SEG(0xdfffffffUL)
#else
#define USER_DS MAKE_MM_SEG(memory_end)
#define KERNEL_DS MAKE_MM_SEG(0xe0000000UL)
#endif
#define get_ds() (KERNEL_DS)
#define get_fs() (__current_thread_info->addr_limit)
#define segment_eq(a, b) ((a).seg == (b).seg)
#define get_addr_limit() (get_fs().seg)
#define set_fs(_x) \
do { \
__current_thread_info->addr_limit = (_x); \
} while(0)
#endif /* __ASSEMBLY__ */
#endif /* _ASM_SEGMENT_H */
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