summaryrefslogblamecommitdiff
path: root/include/asm-arm/irqflags.h
blob: 6d09974e66462c6801d869dafbf7d3e54b9c45d7 (plain) (tree) 
7ad1bcb25c56 ^




































































































































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
121
122
123
124
125
126
127
128
129
130
131
132




































































































































                                                                                      
#ifndef __ASM_ARM_IRQFLAGS_H
#define __ASM_ARM_IRQFLAGS_H

#ifdef __KERNEL__

#include <asm/ptrace.h>

/*
 * CPU interrupt mask handling.
 */
#if __LINUX_ARM_ARCH__ >= 6

#define raw_local_irq_save(x)					\
	({							\
	__asm__ __volatile__(					\
	"mrs	%0, cpsr		@ local_irq_save\n"	\
	"cpsid	i"						\
	: "=r" (x) : : "memory", "cc");				\
	})

#define raw_local_irq_enable()  __asm__("cpsie i	@ __sti" : : : "memory", "cc")
#define raw_local_irq_disable() __asm__("cpsid i	@ __cli" : : : "memory", "cc")
#define local_fiq_enable()  __asm__("cpsie f	@ __stf" : : : "memory", "cc")
#define local_fiq_disable() __asm__("cpsid f	@ __clf" : : : "memory", "cc")

#else

/*
 * Save the current interrupt enable state & disable IRQs
 */
#define raw_local_irq_save(x)					\
	({							\
		unsigned long temp;				\
		(void) (&temp == &x);				\
	__asm__ __volatile__(					\
	"mrs	%0, cpsr		@ local_irq_save\n"	\
"	orr	%1, %0, #128\n"					\
"	msr	cpsr_c, %1"					\
	: "=r" (x), "=r" (temp)					\
	:							\
	: "memory", "cc");					\
	})
	
/*
 * Enable IRQs
 */
#define raw_local_irq_enable()					\
	({							\
		unsigned long temp;				\
	__asm__ __volatile__(					\
	"mrs	%0, cpsr		@ local_irq_enable\n"	\
"	bic	%0, %0, #128\n"					\
"	msr	cpsr_c, %0"					\
	: "=r" (temp)						\
	:							\
	: "memory", "cc");					\
	})

/*
 * Disable IRQs
 */
#define raw_local_irq_disable()					\
	({							\
		unsigned long temp;				\
	__asm__ __volatile__(					\
	"mrs	%0, cpsr		@ local_irq_disable\n"	\
"	orr	%0, %0, #128\n"					\
"	msr	cpsr_c, %0"					\
	: "=r" (temp)						\
	:							\
	: "memory", "cc");					\
	})

/*
 * Enable FIQs
 */
#define local_fiq_enable()					\
	({							\
		unsigned long temp;				\
	__asm__ __volatile__(					\
	"mrs	%0, cpsr		@ stf\n"		\
"	bic	%0, %0, #64\n"					\
"	msr	cpsr_c, %0"					\
	: "=r" (temp)						\
	:							\
	: "memory", "cc");					\
	})

/*
 * Disable FIQs
 */
#define local_fiq_disable()					\
	({							\
		unsigned long temp;				\
	__asm__ __volatile__(					\
	"mrs	%0, cpsr		@ clf\n"		\
"	orr	%0, %0, #64\n"					\
"	msr	cpsr_c, %0"					\
	: "=r" (temp)						\
	:							\
	: "memory", "cc");					\
	})

#endif

/*
 * Save the current interrupt enable state.
 */
#define raw_local_save_flags(x)					\
	({							\
	__asm__ __volatile__(					\
	"mrs	%0, cpsr		@ local_save_flags"	\
	: "=r" (x) : : "memory", "cc");				\
	})

/*
 * restore saved IRQ & FIQ state
 */
#define raw_local_irq_restore(x)				\
	__asm__ __volatile__(					\
	"msr	cpsr_c, %0		@ local_irq_restore\n"	\
	:							\
	: "r" (x)						\
	: "memory", "cc")

#define raw_irqs_disabled_flags(flags)	\
({					\
	(int)((flags) & PSR_I_BIT);	\
})

#endif
#endif