arch/parisc/include/asm/special_insns.h

   1 #ifndef __PARISC_SPECIAL_INSNS_H
   2 #define __PARISC_SPECIAL_INSNS_H
   3
   4 #define mfctl(reg)      ({              \
   5         unsigned long cr;               \
   6         __asm__ __volatile__(           \
   7                 "mfctl " #reg ",%0" :   \
   8                  "=r" (cr)              \
   9         );                              \
  10         cr;                             \
  11 })
  12
  13 #define mtctl(gr, cr) \
  14         __asm__ __volatile__("mtctl %0,%1" \
  15                 : /* no outputs */ \
  16                 : "r" (gr), "i" (cr) : "memory")
  17
  18 /* these are here to de-mystefy the calling code, and to provide hooks */
  19 /* which I needed for debugging EIEM problems -PB */
  20 #define get_eiem() mfctl(15)
  21 static inline void set_eiem(unsigned long val)
  22 {
  23         mtctl(val, 15);
  24 }
  25
  26 #define mfsp(reg)       ({              \
  27         unsigned long cr;               \
  28         __asm__ __volatile__(           \
  29                 "mfsp " #reg ",%0" :    \
  30                  "=r" (cr)              \
  31         );                              \
  32         cr;                             \
  33 })
  34
  35 #define mtsp(val, cr) \
  36         { if (__builtin_constant_p(val) && ((val) == 0)) \
  37          __asm__ __volatile__("mtsp %%r0,%0" : : "i" (cr) : "memory"); \
  38         else \
  39          __asm__ __volatile__("mtsp %0,%1" \
  40                 : /* no outputs */ \
  41                 : "r" (val), "i" (cr) : "memory"); }
  42
  43 #endif /* __PARISC_SPECIAL_INSNS_H */