include/asm-m68knommu/segment.h

   1 #ifndef _M68K_SEGMENT_H
   2 #define _M68K_SEGMENT_H
   3
   4 /* define constants */
   5 /* Address spaces (FC0-FC2) */
   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    (5)
  12 #ifndef __KERNEL_DS
  13 #define __KERNEL_DS   (SUPER_DATA)
  14 #endif
  15 #define SUPER_PROGRAM (6)
  16 #define CPU_SPACE     (7)
  17
  18 #ifndef __ASSEMBLY__
  19
  20 typedef struct {
  21         unsigned long seg;
  22 } mm_segment_t;
  23
  24 #define MAKE_MM_SEG(s)  ((mm_segment_t) { (s) })
  25 #define USER_DS         MAKE_MM_SEG(__USER_DS)
  26 #define KERNEL_DS       MAKE_MM_SEG(__KERNEL_DS)
  27
  28 /*
  29  * Get/set the SFC/DFC registers for MOVES instructions
  30  */
  31
  32 static inline mm_segment_t get_fs(void)
  33 {
  34     return USER_DS;
  35 }
  36
  37 static inline mm_segment_t get_ds(void)
  38 {
  39     /* return the supervisor data space code */
  40     return KERNEL_DS;
  41 }
  42
  43 static inline void set_fs(mm_segment_t val)
  44 {
  45 }
  46
  47 #define segment_eq(a,b) ((a).seg == (b).seg)
  48
  49 #endif /* __ASSEMBLY__ */
  50
  51 #endif /* _M68K_SEGMENT_H */