aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sparc/include/asm/irqflags_64.h
blob: bb42e59162aab85829566a369255a55ce67180aa (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
/*
 * include/asm/irqflags.h
 *
 * IRQ flags handling
 *
 * This file gets included from lowlevel asm headers too, to provide
 * wrapped versions of the local_irq_*() APIs, based on the
 * raw_local_irq_*() functions from the lowlevel headers.
 */
#ifndef _ASM_IRQFLAGS_H
#define _ASM_IRQFLAGS_H

#ifndef __ASSEMBLY__

static inline unsigned long __raw_local_save_flags(void)
{
	unsigned long flags;

	__asm__ __volatile__(
		"rdpr	%%pil, %0"
		: "=r" (flags)
	);

	return flags;
}

#define raw_local_save_flags(flags) \
		do { (flags) = __raw_local_save_flags(); } while (0)

static inline void raw_local_irq_restore(unsigned long flags)
{
	__asm__ __volatile__(
		"wrpr	%0, %%pil"
		: /* no output */
		: "r" (flags)
		: "memory"
	);
}

static inline void raw_local_irq_disable(void)
{
	__asm__ __volatile__(
		"wrpr	15, %%pil"
		: /* no outputs */
		: /* no inputs */
		: "memory"
	);
}

static inline void raw_local_irq_enable(void)
{
	__asm__ __volatile__(
		"wrpr	0, %%pil"
		: /* no outputs */
		: /* no inputs */
		: "memory"
	);
}

static inline int raw_irqs_disabled_flags(unsigned long flags)
{
	return (flags > 0);
}

static inline int raw_irqs_disabled(void)
{
	unsigned long flags = __raw_local_save_flags();

	return raw_irqs_disabled_flags(flags);
}

/*
 * For spinlocks, etc:
 */
static inline unsigned long __raw_local_irq_save(void)
{
	unsigned long flags = __raw_local_save_flags();

	raw_local_irq_disable();

	return flags;
}

#define raw_local_irq_save(flags) \
		do { (flags) = __raw_local_irq_save(); } while (0)

#endif /* (__ASSEMBLY__) */

#endif /* !(_ASM_IRQFLAGS_H) */