| #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 */ |