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 | 14 | #include <linux/typecheck.h> |
df9ee292 | 15 | #include <asm/irqflags.h> |
3f307891 | 16 | |
de30a2b3 | 17 | #ifdef CONFIG_TRACE_IRQFLAGS |
de30a2b3 IM |
18 | extern void trace_softirqs_on(unsigned long ip); |
19 | extern void trace_softirqs_off(unsigned long ip); | |
81d68a96 SR |
20 | extern void trace_hardirqs_on(void); |
21 | extern void trace_hardirqs_off(void); | |
de30a2b3 IM |
22 | # define trace_hardirq_context(p) ((p)->hardirq_context) |
23 | # define trace_softirq_context(p) ((p)->softirq_context) | |
24 | # define trace_hardirqs_enabled(p) ((p)->hardirqs_enabled) | |
25 | # define trace_softirqs_enabled(p) ((p)->softirqs_enabled) | |
26 | # define trace_hardirq_enter() do { current->hardirq_context++; } while (0) | |
27 | # define trace_hardirq_exit() do { current->hardirq_context--; } while (0) | |
d820ac4c IM |
28 | # define lockdep_softirq_enter() do { current->softirq_context++; } while (0) |
29 | # define lockdep_softirq_exit() do { current->softirq_context--; } while (0) | |
de30a2b3 IM |
30 | # define INIT_TRACE_IRQFLAGS .softirqs_enabled = 1, |
31 | #else | |
32 | # define trace_hardirqs_on() do { } while (0) | |
33 | # define trace_hardirqs_off() do { } while (0) | |
34 | # define trace_softirqs_on(ip) do { } while (0) | |
35 | # define trace_softirqs_off(ip) do { } while (0) | |
36 | # define trace_hardirq_context(p) 0 | |
37 | # define trace_softirq_context(p) 0 | |
38 | # define trace_hardirqs_enabled(p) 0 | |
39 | # define trace_softirqs_enabled(p) 0 | |
40 | # define trace_hardirq_enter() do { } while (0) | |
41 | # define trace_hardirq_exit() do { } while (0) | |
d820ac4c IM |
42 | # define lockdep_softirq_enter() do { } while (0) |
43 | # define lockdep_softirq_exit() do { } while (0) | |
de30a2b3 IM |
44 | # define INIT_TRACE_IRQFLAGS |
45 | #endif | |
46 | ||
6cd8a4bb SR |
47 | #if defined(CONFIG_IRQSOFF_TRACER) || \ |
48 | defined(CONFIG_PREEMPT_TRACER) | |
81d68a96 SR |
49 | extern void stop_critical_timings(void); |
50 | extern void start_critical_timings(void); | |
51 | #else | |
52 | # define stop_critical_timings() do { } while (0) | |
53 | # define start_critical_timings() do { } while (0) | |
54 | #endif | |
55 | ||
df9ee292 DH |
56 | /* |
57 | * Wrap the arch provided IRQ routines to provide appropriate checks. | |
58 | */ | |
59 | #define raw_local_irq_disable() arch_local_irq_disable() | |
60 | #define raw_local_irq_enable() arch_local_irq_enable() | |
61 | #define raw_local_irq_save(flags) \ | |
62 | do { \ | |
63 | typecheck(unsigned long, flags); \ | |
64 | flags = arch_local_irq_save(); \ | |
65 | } while (0) | |
66 | #define raw_local_irq_restore(flags) \ | |
67 | do { \ | |
68 | typecheck(unsigned long, flags); \ | |
69 | arch_local_irq_restore(flags); \ | |
70 | } while (0) | |
71 | #define raw_local_save_flags(flags) \ | |
72 | do { \ | |
73 | typecheck(unsigned long, flags); \ | |
74 | flags = arch_local_save_flags(); \ | |
75 | } while (0) | |
76 | #define raw_irqs_disabled_flags(flags) \ | |
77 | ({ \ | |
78 | typecheck(unsigned long, flags); \ | |
79 | arch_irqs_disabled_flags(flags); \ | |
80 | }) | |
81 | #define raw_irqs_disabled() (arch_irqs_disabled()) | |
82 | #define raw_safe_halt() arch_safe_halt() | |
de30a2b3 | 83 | |
df9ee292 DH |
84 | /* |
85 | * The local_irq_*() APIs are equal to the raw_local_irq*() | |
86 | * if !TRACE_IRQFLAGS. | |
87 | */ | |
88 | #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT | |
de30a2b3 IM |
89 | #define local_irq_enable() \ |
90 | do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0) | |
91 | #define local_irq_disable() \ | |
92 | do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0) | |
3f307891 SR |
93 | #define local_irq_save(flags) \ |
94 | do { \ | |
3f307891 SR |
95 | raw_local_irq_save(flags); \ |
96 | trace_hardirqs_off(); \ | |
97 | } while (0) | |
de30a2b3 | 98 | |
3f307891 SR |
99 | |
100 | #define local_irq_restore(flags) \ | |
101 | do { \ | |
3f307891 SR |
102 | if (raw_irqs_disabled_flags(flags)) { \ |
103 | raw_local_irq_restore(flags); \ | |
104 | trace_hardirqs_off(); \ | |
105 | } else { \ | |
106 | trace_hardirqs_on(); \ | |
107 | raw_local_irq_restore(flags); \ | |
108 | } \ | |
de30a2b3 | 109 | } while (0) |
df9ee292 | 110 | #define local_save_flags(flags) \ |
3f307891 | 111 | do { \ |
df9ee292 | 112 | raw_local_save_flags(flags); \ |
3f307891 | 113 | } while (0) |
de30a2b3 | 114 | |
df9ee292 DH |
115 | #define irqs_disabled_flags(flags) \ |
116 | ({ \ | |
117 | raw_irqs_disabled_flags(flags); \ | |
118 | }) | |
de30a2b3 | 119 | |
df9ee292 DH |
120 | #define irqs_disabled() \ |
121 | ({ \ | |
122 | unsigned long _flags; \ | |
123 | raw_local_save_flags(_flags); \ | |
124 | raw_irqs_disabled_flags(_flags); \ | |
125 | }) | |
126 | ||
127 | #define safe_halt() \ | |
128 | do { \ | |
129 | trace_hardirqs_on(); \ | |
130 | raw_safe_halt(); \ | |
3f307891 | 131 | } while (0) |
de30a2b3 | 132 | |
de30a2b3 | 133 | |
df9ee292 DH |
134 | #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */ |
135 | ||
136 | #define local_irq_enable() do { raw_local_irq_enable(); } while (0) | |
137 | #define local_irq_disable() do { raw_local_irq_disable(); } while (0) | |
138 | #define local_irq_save(flags) \ | |
139 | do { \ | |
140 | raw_local_irq_save(flags); \ | |
141 | } while (0) | |
142 | #define local_irq_restore(flags) do { raw_local_irq_restore(flags); } while (0) | |
143 | #define local_save_flags(flags) do { raw_local_save_flags(flags); } while (0) | |
144 | #define irqs_disabled() (raw_irqs_disabled()) | |
145 | #define irqs_disabled_flags(flags) (raw_irqs_disabled_flags(flags)) | |
146 | #define safe_halt() do { raw_safe_halt(); } while (0) | |
147 | ||
40b1f4e5 | 148 | #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ |
de30a2b3 IM |
149 | |
150 | #endif |