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backoff.h

#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 */

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