Commit | Line | Data |
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de30a2b3 IM |
1 | /* |
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 | |
de30a2b3 IM |
15 | extern void trace_softirqs_on(unsigned long ip); |
16 | extern void trace_softirqs_off(unsigned long ip); | |
81d68a96 SR |
17 | extern void trace_hardirqs_on(void); |
18 | extern void trace_hardirqs_off(void); | |
de30a2b3 IM |
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 | ||
6cd8a4bb SR |
44 | #if defined(CONFIG_IRQSOFF_TRACER) || \ |
45 | defined(CONFIG_PREEMPT_TRACER) | |
81d68a96 SR |
46 | extern void stop_critical_timings(void); |
47 | extern void start_critical_timings(void); | |
48 | #else | |
49 | # define stop_critical_timings() do { } while (0) | |
50 | # define start_critical_timings() do { } while (0) | |
51 | #endif | |
52 | ||
de30a2b3 IM |
53 | #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT |
54 | ||
55 | #include <asm/irqflags.h> | |
56 | ||
57 | #define local_irq_enable() \ | |
58 | do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0) | |
59 | #define local_irq_disable() \ | |
60 | do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0) | |
61 | #define local_irq_save(flags) \ | |
62 | do { raw_local_irq_save(flags); trace_hardirqs_off(); } while (0) | |
63 | ||
64 | #define local_irq_restore(flags) \ | |
65 | do { \ | |
66 | if (raw_irqs_disabled_flags(flags)) { \ | |
67 | raw_local_irq_restore(flags); \ | |
68 | trace_hardirqs_off(); \ | |
69 | } else { \ | |
70 | trace_hardirqs_on(); \ | |
71 | raw_local_irq_restore(flags); \ | |
72 | } \ | |
73 | } while (0) | |
74 | #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */ | |
75 | /* | |
76 | * The local_irq_*() APIs are equal to the raw_local_irq*() | |
77 | * if !TRACE_IRQFLAGS. | |
78 | */ | |
79 | # define raw_local_irq_disable() local_irq_disable() | |
80 | # define raw_local_irq_enable() local_irq_enable() | |
81 | # define raw_local_irq_save(flags) local_irq_save(flags) | |
82 | # define raw_local_irq_restore(flags) local_irq_restore(flags) | |
83 | #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ | |
84 | ||
85 | #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT | |
86 | #define safe_halt() \ | |
87 | do { \ | |
88 | trace_hardirqs_on(); \ | |
89 | raw_safe_halt(); \ | |
90 | } while (0) | |
91 | ||
92 | #define local_save_flags(flags) raw_local_save_flags(flags) | |
93 | ||
94 | #define irqs_disabled() \ | |
95 | ({ \ | |
a7d5ac87 | 96 | unsigned long _flags; \ |
de30a2b3 | 97 | \ |
a7d5ac87 HH |
98 | raw_local_save_flags(_flags); \ |
99 | raw_irqs_disabled_flags(_flags); \ | |
de30a2b3 IM |
100 | }) |
101 | ||
102 | #define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags) | |
103 | #endif /* CONFIG_X86 */ | |
104 | ||
105 | #endif |