arch/parisc/include/asm/special_insns.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __PARISC_SPECIAL_INSNS_H
   3 #define __PARISC_SPECIAL_INSNS_H
   4
   5 #define mfctl(reg)      ({              \
   6         unsigned long cr;               \
   7         __asm__ __volatile__(           \
   8                 "mfctl " #reg ",%0" :   \
   9                  "=r" (cr)              \
  10         );                              \
  11         cr;                             \
  12 })
  13
  14 #define mtctl(gr, cr) \
  15         __asm__ __volatile__("mtctl %0,%1" \
  16                 : /* no outputs */ \
  17                 : "r" (gr), "i" (cr) : "memory")
  18
  19 /* these are here to de-mystefy the calling code, and to provide hooks */
  20 /* which I needed for debugging EIEM problems -PB */
  21 #define get_eiem() mfctl(15)
  22 static inline void set_eiem(unsigned long val)
  23 {
  24         mtctl(val, 15);
  25 }
  26
  27 #define mfsp(reg)       ({              \
  28         unsigned long cr;               \
  29         __asm__ __volatile__(           \
  30                 "mfsp " #reg ",%0" :    \
  31                  "=r" (cr)              \
  32         );                              \
  33         cr;                             \
  34 })
  35
  36 #define mtsp(val, cr) \
  37         { if (__builtin_constant_p(val) && ((val) == 0)) \
  38          __asm__ __volatile__("mtsp %%r0,%0" : : "i" (cr) : "memory"); \
  39         else \
  40          __asm__ __volatile__("mtsp %0,%1" \
  41                 : /* no outputs */ \
  42                 : "r" (val), "i" (cr) : "memory"); }
  43
  44 #endif /* __PARISC_SPECIAL_INSNS_H */