1 |
62 |
marcus.erl |
/*
|
2 |
|
|
* include/linux/irqflags.h
|
3 |
|
|
*
|
4 |
|
|
* IRQ flags tracing: follow the state of the hardirq and softirq flags and
|
5 |
|
|
* provide callbacks for transitions between ON and OFF states.
|
6 |
|
|
*
|
7 |
|
|
* This file gets included from lowlevel asm headers too, to provide
|
8 |
|
|
* wrapped versions of the local_irq_*() APIs, based on the
|
9 |
|
|
* raw_local_irq_*() macros from the lowlevel headers.
|
10 |
|
|
*/
|
11 |
|
|
#ifndef _LINUX_TRACE_IRQFLAGS_H
|
12 |
|
|
#define _LINUX_TRACE_IRQFLAGS_H
|
13 |
|
|
|
14 |
|
|
#ifdef CONFIG_TRACE_IRQFLAGS
|
15 |
|
|
extern void trace_hardirqs_on(void);
|
16 |
|
|
extern void trace_hardirqs_off(void);
|
17 |
|
|
extern void trace_softirqs_on(unsigned long ip);
|
18 |
|
|
extern void trace_softirqs_off(unsigned long ip);
|
19 |
|
|
# define trace_hardirq_context(p) ((p)->hardirq_context)
|
20 |
|
|
# define trace_softirq_context(p) ((p)->softirq_context)
|
21 |
|
|
# define trace_hardirqs_enabled(p) ((p)->hardirqs_enabled)
|
22 |
|
|
# define trace_softirqs_enabled(p) ((p)->softirqs_enabled)
|
23 |
|
|
# define trace_hardirq_enter() do { current->hardirq_context++; } while (0)
|
24 |
|
|
# define trace_hardirq_exit() do { current->hardirq_context--; } while (0)
|
25 |
|
|
# define trace_softirq_enter() do { current->softirq_context++; } while (0)
|
26 |
|
|
# define trace_softirq_exit() do { current->softirq_context--; } while (0)
|
27 |
|
|
# define INIT_TRACE_IRQFLAGS .softirqs_enabled = 1,
|
28 |
|
|
#else
|
29 |
|
|
# define trace_hardirqs_on() do { } while (0)
|
30 |
|
|
# define trace_hardirqs_off() do { } while (0)
|
31 |
|
|
# define trace_softirqs_on(ip) do { } while (0)
|
32 |
|
|
# define trace_softirqs_off(ip) do { } while (0)
|
33 |
|
|
# define trace_hardirq_context(p) 0
|
34 |
|
|
# define trace_softirq_context(p) 0
|
35 |
|
|
# define trace_hardirqs_enabled(p) 0
|
36 |
|
|
# define trace_softirqs_enabled(p) 0
|
37 |
|
|
# define trace_hardirq_enter() do { } while (0)
|
38 |
|
|
# define trace_hardirq_exit() do { } while (0)
|
39 |
|
|
# define trace_softirq_enter() do { } while (0)
|
40 |
|
|
# define trace_softirq_exit() do { } while (0)
|
41 |
|
|
# define INIT_TRACE_IRQFLAGS
|
42 |
|
|
#endif
|
43 |
|
|
|
44 |
|
|
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
|
45 |
|
|
|
46 |
|
|
#include <asm/irqflags.h>
|
47 |
|
|
|
48 |
|
|
#define local_irq_enable() \
|
49 |
|
|
do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0)
|
50 |
|
|
#define local_irq_disable() \
|
51 |
|
|
do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
|
52 |
|
|
#define local_irq_save(flags) \
|
53 |
|
|
do { raw_local_irq_save(flags); trace_hardirqs_off(); } while (0)
|
54 |
|
|
|
55 |
|
|
#define local_irq_restore(flags) \
|
56 |
|
|
do { \
|
57 |
|
|
if (raw_irqs_disabled_flags(flags)) { \
|
58 |
|
|
raw_local_irq_restore(flags); \
|
59 |
|
|
trace_hardirqs_off(); \
|
60 |
|
|
} else { \
|
61 |
|
|
trace_hardirqs_on(); \
|
62 |
|
|
raw_local_irq_restore(flags); \
|
63 |
|
|
} \
|
64 |
|
|
} while (0)
|
65 |
|
|
#else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */
|
66 |
|
|
/*
|
67 |
|
|
* The local_irq_*() APIs are equal to the raw_local_irq*()
|
68 |
|
|
* if !TRACE_IRQFLAGS.
|
69 |
|
|
*/
|
70 |
|
|
# define raw_local_irq_disable() local_irq_disable()
|
71 |
|
|
# define raw_local_irq_enable() local_irq_enable()
|
72 |
|
|
# define raw_local_irq_save(flags) local_irq_save(flags)
|
73 |
|
|
# define raw_local_irq_restore(flags) local_irq_restore(flags)
|
74 |
|
|
#endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
|
75 |
|
|
|
76 |
|
|
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
|
77 |
|
|
#define safe_halt() \
|
78 |
|
|
do { \
|
79 |
|
|
trace_hardirqs_on(); \
|
80 |
|
|
raw_safe_halt(); \
|
81 |
|
|
} while (0)
|
82 |
|
|
|
83 |
|
|
#define local_save_flags(flags) raw_local_save_flags(flags)
|
84 |
|
|
|
85 |
|
|
#define irqs_disabled() \
|
86 |
|
|
({ \
|
87 |
|
|
unsigned long flags; \
|
88 |
|
|
\
|
89 |
|
|
raw_local_save_flags(flags); \
|
90 |
|
|
raw_irqs_disabled_flags(flags); \
|
91 |
|
|
})
|
92 |
|
|
|
93 |
|
|
#define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
|
94 |
|
|
#endif /* CONFIG_X86 */
|
95 |
|
|
|
96 |
|
|
#endif
|