arch/h8300/include/asm/segment.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _H8300_SEGMENT_H
   3 #define _H8300_SEGMENT_H
   4
   5 /* define constants */
   6 #define USER_DATA     (1)
   7 #ifndef __USER_DS
   8 #define __USER_DS     (USER_DATA)
   9 #endif
  10 #define USER_PROGRAM  (2)
  11 #define SUPER_DATA    (3)
  12 #ifndef __KERNEL_DS
  13 #define __KERNEL_DS   (SUPER_DATA)
  14 #endif
  15 #define SUPER_PROGRAM (4)
  16
  17 #ifndef __ASSEMBLY__
  18
  19 typedef struct {
  20         unsigned long seg;
  21 } mm_segment_t;
  22
  23 #define MAKE_MM_SEG(s)  ((mm_segment_t) { (s) })
  24 #define USER_DS         MAKE_MM_SEG(__USER_DS)
  25 #define KERNEL_DS       MAKE_MM_SEG(__KERNEL_DS)
  26
  27 /*
  28  * Get/set the SFC/DFC registers for MOVES instructions
  29  */
  30
  31 static inline mm_segment_t get_fs(void)
  32 {
  33         return USER_DS;
  34 }
  35
  36 static inline mm_segment_t get_ds(void)
  37 {
  38         /* return the supervisor data space code */
  39         return KERNEL_DS;
  40 }
  41
  42 #define segment_eq(a, b)        ((a).seg == (b).seg)
  43
  44 #endif /* __ASSEMBLY__ */
  45
  46 #endif /* _H8300_SEGMENT_H */