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40 lines
788 B
40 lines
788 B
/* 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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