summaryrefslogtreecommitdiffstats
path: root/arch/score/include/asm/irqflags.h
blob: 5c7563891e288e9b972e9ecc38b8a1b1dd361ee0 (plain)
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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
#ifndef _ASM_SCORE_IRQFLAGS_H
#define _ASM_SCORE_IRQFLAGS_H

#ifndef __ASSEMBLY__

#include <linux/types.h>

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

	asm volatile(
		"	mfcr	r8, cr0		\n"
		"	nop			\n"
		"	nop			\n"
		"	mv	%0, r8		\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	ldi	r9, 0x1		\n"
		"	and	%0, %0, r9	\n"
		: "=r" (flags)
		:
		: "r8", "r9");
	return flags;
}

static inline unsigned long arch_local_irq_save(void)
{
	unsigned long flags

	asm volatile(
		"	mfcr	r8, cr0		\n"
		"	li	r9, 0xfffffffe	\n"
		"	nop			\n"
		"	mv	%0, r8		\n"
		"	and	r8, r8, r9	\n"
		"	mtcr	r8, cr0		\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		: "=r" (flags)
		:
		: "r8", "r9", "memory");

	return flags;
}

static inline void arch_local_irq_restore(unsigned long flags)
{
	asm volatile(
		"	mfcr	r8, cr0		\n"
		"	ldi	r9, 0x1		\n"
		"	and	%0, %0, r9	\n"
		"	or	r8, r8, %0	\n"
		"	mtcr	r8, cr0		\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		:
		: "r"(flags)
		: "r8", "r9", "memory");
}

static inline void arch_local_irq_enable(void)
{
	asm volatile(
		"	mfcr	r8,cr0		\n"
		"	nop			\n"
		"	nop			\n"
		"	ori	r8,0x1		\n"
		"	mtcr	r8,cr0		\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		:
		:
		: "r8", "memory");
}

static inline void arch_local_irq_disable(void)
{
	asm volatile(
		"	mfcr	r8,cr0		\n"
		"	nop			\n"
		"	nop			\n"
		"	srli	r8,r8,1		\n"
		"	slli	r8,r8,1		\n"
		"	mtcr	r8,cr0		\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		"	nop			\n"
		:
		:
		: "r8", "memory");
}

static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
	return !(flags & 1);
}

static inline bool arch_irqs_disabled(void)
{
	return arch_irqs_disabled_flags(arch_local_save_flags());
}

#endif /* __ASSEMBLY__ */

#endif /* _ASM_SCORE_IRQFLAGS_H */