special_insns.h

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#ifndef __PARISC_SPECIAL_INSNS_H
#define __PARISC_SPECIAL_INSNS_H

#define mfctl(reg)  ({      \
    unsigned long cr;       \
    __asm__ __volatile__(       \
        "mfctl " #reg ",%0" :   \
         "=r" (cr)      \
    );              \
    cr;             \
})

#define mtctl(gr, cr) \
    __asm__ __volatile__("mtctl %0,%1" \
        : /* no outputs */ \
        : "r" (gr), "i" (cr) : "memory")

/* these are here to de-mystefy the calling code, and to provide hooks */
/* which I needed for debugging EIEM problems -PB */
#define get_eiem() mfctl(15)
static inline void set_eiem(unsigned long val)
{
    mtctl(val, 15);
}

#define mfsp(reg)   ({      \
    unsigned long cr;       \
    __asm__ __volatile__(       \
        "mfsp " #reg ",%0" :    \
         "=r" (cr)      \
    );              \
    cr;             \
})

#define mtsp(gr, cr) \
    __asm__ __volatile__("mtsp %0,%1" \
        : /* no outputs */ \
        : "r" (gr), "i" (cr) : "memory")

#endif /* __PARISC_SPECIAL_INSNS_H */