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_LABEL(spin_label, continue_label) \
12	spin_label
13
14#define BACKOFF_SPIN(reg, tmp, label)	\
15	mov	reg, tmp; \
1688:	brnz,pt	tmp, 88b; \
17	 sub	tmp, 1, tmp; \
18	set	BACKOFF_LIMIT, tmp; \
19	cmp	reg, tmp; \
20	bg,pn	%xcc, label; \
21	 nop; \
22	ba,pt	%xcc, label; \
23	 sllx	reg, 1, reg;
24
25#else
26
27#define BACKOFF_SETUP(reg)
28
29#define BACKOFF_LABEL(spin_label, continue_label) \
30	continue_label
31
32#define BACKOFF_SPIN(reg, tmp, label)
33
34#endif
35
36#endif /* _SPARC64_BACKOFF_H */

 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_LABEL(spin_label, continue_label) \
12	spin_label
13
14#define BACKOFF_SPIN(reg, tmp, label)	\
15	mov	reg, tmp; \
1688:	brnz,pt	tmp, 88b; \
17	 sub	tmp, 1, tmp; \
18	set	BACKOFF_LIMIT, tmp; \
19	cmp	reg, tmp; \
20	bg,pn	%xcc, label; \
21	 nop; \
22	ba,pt	%xcc, label; \
23	 sllx	reg, 1, reg;
24
25#else
26
27#define BACKOFF_SETUP(reg)
28
29#define BACKOFF_LABEL(spin_label, continue_label) \
30	continue_label
31
32#define BACKOFF_SPIN(reg, tmp, label)
33
34#endif
35
36#endif /* _SPARC64_BACKOFF_H */