[mirror_ubuntu-artful-kernel.git] / include / asm-sparc64 / 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 */
Commit	Line	Data
24f287e4 DM	1	#ifndef _SPARC64_BACKOFF_H
	2	#define _SPARC64_BACKOFF_H
	3
	4	#define BACKOFF_LIMIT (4 * 1024)
	5
	6	#ifdef CONFIG_SMP
	7
	8	#define BACKOFF_SETUP(reg) \
	9	mov 1, reg
	10
	11	#define BACKOFF_SPIN(reg, tmp, label) \
	12	mov reg, tmp; \
	13	88: brnz,pt tmp, 88b; \
	14	sub tmp, 1, tmp; \
4cfea5a7 DM	15	set BACKOFF_LIMIT, tmp; \
4cfea5a7 DM	16	cmp reg, tmp; \
24f287e4 DM	17	bg,pn %xcc, label; \
	18	nop; \
	19	ba,pt %xcc, label; \
	20	sllx reg, 1, reg;
	21
	22	#else
	23
	24	#define BACKOFF_SETUP(reg)
0aa031d9 DM	25	#define BACKOFF_SPIN(reg, tmp, label) \
	26	ba,pt %xcc, label; \
	27	nop;
24f287e4 DM	28
	29	#endif
	30
	31	#endif /* _SPARC64_BACKOFF_H */