5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
41 lines
788 B
C
41 lines
788 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _H8300_SEGMENT_H
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#define _H8300_SEGMENT_H
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/* define constants */
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#define USER_DATA (1)
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#ifndef __USER_DS
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#define __USER_DS (USER_DATA)
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#endif
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#define USER_PROGRAM (2)
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#define SUPER_DATA (3)
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#ifndef __KERNEL_DS
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#define __KERNEL_DS (SUPER_DATA)
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#endif
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#define SUPER_PROGRAM (4)
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#ifndef __ASSEMBLY__
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typedef struct {
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unsigned long seg;
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} mm_segment_t;
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#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
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#define USER_DS MAKE_MM_SEG(__USER_DS)
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#define KERNEL_DS MAKE_MM_SEG(__KERNEL_DS)
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/*
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* Get/set the SFC/DFC registers for MOVES instructions
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*/
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static inline mm_segment_t get_fs(void)
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{
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return USER_DS;
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}
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#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
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#endif /* __ASSEMBLY__ */
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#endif /* _H8300_SEGMENT_H */
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