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 | ||
3f307891 SR |
14 | #include <linux/typecheck.h> |
15 | ||
de30a2b3 | 16 | #ifdef CONFIG_TRACE_IRQFLAGS |
de30a2b3 IM |
17 | extern void trace_softirqs_on(unsigned long ip); |
18 | extern void trace_softirqs_off(unsigned long ip); | |
81d68a96 SR |
19 | extern void trace_hardirqs_on(void); |
20 | extern void trace_hardirqs_off(void); | |
de30a2b3 IM |
21 | # define trace_hardirq_context(p) ((p)->hardirq_context) |
22 | # define trace_softirq_context(p) ((p)->softirq_context) | |
23 | # define trace_hardirqs_enabled(p) ((p)->hardirqs_enabled) | |
24 | # define trace_softirqs_enabled(p) ((p)->softirqs_enabled) | |
25 | # define trace_hardirq_enter() do { current->hardirq_context++; } while (0) | |
26 | # define trace_hardirq_exit() do { current->hardirq_context--; } while (0) | |
d820ac4c IM |
27 | # define lockdep_softirq_enter() do { current->softirq_context++; } while (0) |
28 | # define lockdep_softirq_exit() do { current->softirq_context--; } while (0) | |
de30a2b3 IM |
29 | # define INIT_TRACE_IRQFLAGS .softirqs_enabled = 1, |
30 | #else | |
31 | # define trace_hardirqs_on() do { } while (0) | |
32 | # define trace_hardirqs_off() do { } while (0) | |
33 | # define trace_softirqs_on(ip) do { } while (0) | |
34 | # define trace_softirqs_off(ip) do { } while (0) | |
35 | # define trace_hardirq_context(p) 0 | |
36 | # define trace_softirq_context(p) 0 | |
37 | # define trace_hardirqs_enabled(p) 0 | |
38 | # define trace_softirqs_enabled(p) 0 | |
39 | # define trace_hardirq_enter() do { } while (0) | |
40 | # define trace_hardirq_exit() do { } while (0) | |
d820ac4c IM |
41 | # define lockdep_softirq_enter() do { } while (0) |
42 | # define lockdep_softirq_exit() do { } while (0) | |
de30a2b3 IM |
43 | # define INIT_TRACE_IRQFLAGS |
44 | #endif | |
45 | ||
6cd8a4bb SR |
46 | #if defined(CONFIG_IRQSOFF_TRACER) || \ |
47 | defined(CONFIG_PREEMPT_TRACER) | |
81d68a96 SR |
48 | extern void stop_critical_timings(void); |
49 | extern void start_critical_timings(void); | |
50 | #else | |
51 | # define stop_critical_timings() do { } while (0) | |
52 | # define start_critical_timings() do { } while (0) | |
53 | #endif | |
54 | ||
de30a2b3 IM |
55 | #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT |
56 | ||
57 | #include <asm/irqflags.h> | |
58 | ||
59 | #define local_irq_enable() \ | |
60 | do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0) | |
61 | #define local_irq_disable() \ | |
62 | do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0) | |
3f307891 SR |
63 | #define local_irq_save(flags) \ |
64 | do { \ | |
65 | typecheck(unsigned long, flags); \ | |
66 | raw_local_irq_save(flags); \ | |
67 | trace_hardirqs_off(); \ | |
68 | } while (0) | |
de30a2b3 | 69 | |
3f307891 SR |
70 | |
71 | #define local_irq_restore(flags) \ | |
72 | do { \ | |
73 | typecheck(unsigned long, flags); \ | |
74 | if (raw_irqs_disabled_flags(flags)) { \ | |
75 | raw_local_irq_restore(flags); \ | |
76 | trace_hardirqs_off(); \ | |
77 | } else { \ | |
78 | trace_hardirqs_on(); \ | |
79 | raw_local_irq_restore(flags); \ | |
80 | } \ | |
de30a2b3 IM |
81 | } while (0) |
82 | #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */ | |
83 | /* | |
84 | * The local_irq_*() APIs are equal to the raw_local_irq*() | |
85 | * if !TRACE_IRQFLAGS. | |
86 | */ | |
87 | # define raw_local_irq_disable() local_irq_disable() | |
88 | # define raw_local_irq_enable() local_irq_enable() | |
3f307891 SR |
89 | # define raw_local_irq_save(flags) \ |
90 | do { \ | |
91 | typecheck(unsigned long, flags); \ | |
92 | local_irq_save(flags); \ | |
93 | } while (0) | |
94 | # define raw_local_irq_restore(flags) \ | |
95 | do { \ | |
96 | typecheck(unsigned long, flags); \ | |
97 | local_irq_restore(flags); \ | |
98 | } while (0) | |
de30a2b3 IM |
99 | #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ |
100 | ||
101 | #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT | |
102 | #define safe_halt() \ | |
103 | do { \ | |
104 | trace_hardirqs_on(); \ | |
105 | raw_safe_halt(); \ | |
106 | } while (0) | |
107 | ||
3f307891 SR |
108 | #define local_save_flags(flags) \ |
109 | do { \ | |
110 | typecheck(unsigned long, flags); \ | |
111 | raw_local_save_flags(flags); \ | |
112 | } while (0) | |
de30a2b3 IM |
113 | |
114 | #define irqs_disabled() \ | |
115 | ({ \ | |
a7d5ac87 | 116 | unsigned long _flags; \ |
de30a2b3 | 117 | \ |
a7d5ac87 HH |
118 | raw_local_save_flags(_flags); \ |
119 | raw_irqs_disabled_flags(_flags); \ | |
de30a2b3 IM |
120 | }) |
121 | ||
3f307891 SR |
122 | #define irqs_disabled_flags(flags) \ |
123 | ({ \ | |
124 | typecheck(unsigned long, flags); \ | |
125 | raw_irqs_disabled_flags(flags); \ | |
126 | }) | |
40b1f4e5 | 127 | #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ |
de30a2b3 IM |
128 | |
129 | #endif |