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- #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; \
- cmp reg, BACKOFF_LIMIT; \
- 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 */
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