mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 07:46:53 +07:00
92b5992982
If the value which should be moved into a space register is zero, we can optimize the inline assembly to become "mtsp %r0,%srX". Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # 3.10
44 lines
976 B
C
44 lines
976 B
C
#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(val, cr) \
|
|
{ if (__builtin_constant_p(val) && ((val) == 0)) \
|
|
__asm__ __volatile__("mtsp %%r0,%0" : : "i" (cr) : "memory"); \
|
|
else \
|
|
__asm__ __volatile__("mtsp %0,%1" \
|
|
: /* no outputs */ \
|
|
: "r" (val), "i" (cr) : "memory"); }
|
|
|
|
#endif /* __PARISC_SPECIAL_INSNS_H */
|