blob: 9ce01f3fb7bcb4c98171610cd06cdf45e8a23a8c (
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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*
* include/asm-i386/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
#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
#else
#ifndef __ASSEMBLY__
static inline unsigned long __raw_local_save_flags(void)
{
unsigned long flags;
__asm__ __volatile__(
"pushfl ; popl %0"
: "=g" (flags)
: /* no input */
);
return flags;
}
static inline void raw_local_irq_restore(unsigned long flags)
{
__asm__ __volatile__(
"pushl %0 ; popfl"
: /* no output */
:"g" (flags)
:"memory", "cc"
);
}
static inline void raw_local_irq_disable(void)
{
__asm__ __volatile__("cli" : : : "memory");
}
static inline void raw_local_irq_enable(void)
{
__asm__ __volatile__("sti" : : : "memory");
}
/*
* Used in the idle loop; sti takes one instruction cycle
* to complete:
*/
static inline void raw_safe_halt(void)
{
__asm__ __volatile__("sti; hlt" : : : "memory");
}
/*
* Used when interrupts are already enabled or to
* shutdown the processor:
*/
static inline void halt(void)
{
__asm__ __volatile__("hlt": : :"memory");
}
/*
* 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;
}
#else
#define DISABLE_INTERRUPTS cli
#define ENABLE_INTERRUPTS sti
#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
#define INTERRUPT_RETURN iret
#define GET_CR0_INTO_EAX movl %cr0, %eax
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_PARAVIRT */
#ifndef __ASSEMBLY__
#define raw_local_save_flags(flags) \
do { (flags) = __raw_local_save_flags(); } while (0)
#define raw_local_irq_save(flags) \
do { (flags) = __raw_local_irq_save(); } while (0)
static inline int raw_irqs_disabled_flags(unsigned long flags)
{
return !(flags & (1 << 9));
}
static inline int raw_irqs_disabled(void)
{
unsigned long flags = __raw_local_save_flags();
return raw_irqs_disabled_flags(flags);
}
#endif /* __ASSEMBLY__ */
/*
* Do the CPU's IRQ-state tracing from assembly code. We call a
* C function, so save all the C-clobbered registers:
*/
#ifdef CONFIG_TRACE_IRQFLAGS
# define TRACE_IRQS_ON \
pushl %eax; \
pushl %ecx; \
pushl %edx; \
call trace_hardirqs_on; \
popl %edx; \
popl %ecx; \
popl %eax;
# define TRACE_IRQS_OFF \
pushl %eax; \
pushl %ecx; \
pushl %edx; \
call trace_hardirqs_off; \
popl %edx; \
popl %ecx; \
popl %eax;
#else
# define TRACE_IRQS_ON
# define TRACE_IRQS_OFF
#endif
#endif
|
