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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 | |
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 |