arch/h8300/include/asm/segment.h

   1 #ifndef _H8300_SEGMENT_H
   2 #define _H8300_SEGMENT_H
   3
   4 /* define constants */
   5 #define USER_DATA     (1)
   6 #ifndef __USER_DS
   7 #define __USER_DS     (USER_DATA)
   8 #endif
   9 #define USER_PROGRAM  (2)
  10 #define SUPER_DATA    (3)
  11 #ifndef __KERNEL_DS
  12 #define __KERNEL_DS   (SUPER_DATA)
  13 #endif
  14 #define SUPER_PROGRAM (4)
  15
  16 #ifndef __ASSEMBLY__
  17
  18 typedef struct {
  19         unsigned long seg;
  20 } mm_segment_t;
  21
  22 #define MAKE_MM_SEG(s)  ((mm_segment_t) { (s) })
  23 #define USER_DS         MAKE_MM_SEG(__USER_DS)
  24 #define KERNEL_DS       MAKE_MM_SEG(__KERNEL_DS)
  25
  26 /*
  27  * Get/set the SFC/DFC registers for MOVES instructions
  28  */
  29
  30 static inline mm_segment_t get_fs(void)
  31 {
  32     return USER_DS;
  33 }
  34
  35 static inline mm_segment_t get_ds(void)
  36 {
  37     /* return the supervisor data space code */
  38     return KERNEL_DS;
  39 }
  40
  41 static inline void set_fs(mm_segment_t val)
  42 {
  43 }
  44
  45 #define segment_eq(a,b) ((a).seg == (b).seg)
  46
  47 #endif /* __ASSEMBLY__ */
  48
  49 #endif /* _H8300_SEGMENT_H */