diff options
Diffstat (limited to 'arch/sparc/include/asm/backoff.h')
| -rw-r--r-- | arch/sparc/include/asm/backoff.h | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/arch/sparc/include/asm/backoff.h b/arch/sparc/include/asm/backoff.h index 64b077b3b13..20f01df0871 100644 --- a/arch/sparc/include/asm/backoff.h +++ b/arch/sparc/include/asm/backoff.h | |||
| @@ -11,19 +11,25 @@ | |||
| 11 | #define BACKOFF_LABEL(spin_label, continue_label) \ | 11 | #define BACKOFF_LABEL(spin_label, continue_label) \ |
| 12 | spin_label | 12 | spin_label |
| 13 | 13 | ||
| 14 | #define BACKOFF_SPIN(reg, tmp, label) \ | 14 | #define BACKOFF_SPIN(reg, tmp, label) \ |
| 15 | mov reg, tmp; \ | 15 | mov reg, tmp; \ |
| 16 | 88: rd %ccr, %g0; \ | 16 | 88: rd %ccr, %g0; \ |
| 17 | rd %ccr, %g0; \ | 17 | rd %ccr, %g0; \ |
| 18 | rd %ccr, %g0; \ | 18 | rd %ccr, %g0; \ |
| 19 | brnz,pt tmp, 88b; \ | 19 | .section .pause_patch,"ax"; \ |
| 20 | sub tmp, 1, tmp; \ | 20 | .word 88b; \ |
| 21 | set BACKOFF_LIMIT, tmp; \ | 21 | sllx tmp, 7, tmp; \ |
| 22 | cmp reg, tmp; \ | 22 | wr tmp, 0, %asr27; \ |
| 23 | bg,pn %xcc, label; \ | 23 | clr tmp; \ |
| 24 | nop; \ | 24 | .previous; \ |
| 25 | ba,pt %xcc, label; \ | 25 | brnz,pt tmp, 88b; \ |
| 26 | sllx reg, 1, reg; | 26 | sub tmp, 1, tmp; \ |
| 27 | set BACKOFF_LIMIT, tmp; \ | ||
| 28 | cmp reg, tmp; \ | ||
| 29 | bg,pn %xcc, label; \ | ||
| 30 | nop; \ | ||
| 31 | ba,pt %xcc, label; \ | ||
| 32 | sllx reg, 1, reg; | ||
| 27 | 33 | ||
| 28 | #else | 34 | #else |
| 29 | 35 | ||