forked from Minki/linux
32 lines
514 B
C
32 lines
514 B
C
|
#ifndef _SPARC64_BACKOFF_H
|
||
|
|
#define _SPARC64_BACKOFF_H
|
||
|
|
|
||
|
|
#define BACKOFF_LIMIT (4 * 1024)
|
||
|
|
|
||
|
|
#ifdef CONFIG_SMP
|
||
|
|
|
||
|
|
#define BACKOFF_SETUP(reg) \
|
||
|
|
mov 1, reg
|
||
|
|
|
||
|
|
#define BACKOFF_SPIN(reg, tmp, label) \
|
||
|
|
mov reg, tmp; \
|
||
|
|
88: brnz,pt tmp, 88b; \
|
||
|
|
sub tmp, 1, tmp; \
|
||
|
|
set BACKOFF_LIMIT, tmp; \
|
||
|
|
cmp reg, tmp; \
|
||
|
|
bg,pn %xcc, label; \
|
||
|
|
nop; \
|
||
|
|
ba,pt %xcc, label; \
|
||
|
|
sllx reg, 1, reg;
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define BACKOFF_SETUP(reg)
|
||
|
|
#define BACKOFF_SPIN(reg, tmp, label) \
|
||
|
|
ba,pt %xcc, label; \
|
||
|
|
nop;
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _SPARC64_BACKOFF_H */
|