blob: 412e025bc5c7a6f290d6d665de94d6e6ecf808d4 [file] [log] [blame]
Ingo Molnarde30a2b2006-07-03 00:24:42 -07001/*
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