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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5270 | serge | 1 | /* |
| 2 | * include/linux/irqflags.h |
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| 3 | * |
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| 4 | * IRQ flags tracing: follow the state of the hardirq and softirq flags and |
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| 5 | * provide callbacks for transitions between ON and OFF states. |
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| 6 | * |
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| 7 | * This file gets included from lowlevel asm headers too, to provide |
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| 8 | * wrapped versions of the local_irq_*() APIs, based on the |
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| 9 | * raw_local_irq_*() macros from the lowlevel headers. |
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| 10 | */ |
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| 11 | #ifndef _LINUX_TRACE_IRQFLAGS_H |
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| 12 | #define _LINUX_TRACE_IRQFLAGS_H |
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| 13 | |||
| 14 | #include |
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| 15 | #include |
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| 16 | |||
| 17 | #ifdef CONFIG_TRACE_IRQFLAGS |
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| 18 | extern void trace_softirqs_on(unsigned long ip); |
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| 19 | extern void trace_softirqs_off(unsigned long ip); |
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| 20 | extern void trace_hardirqs_on(void); |
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| 21 | extern void trace_hardirqs_off(void); |
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| 22 | # define trace_hardirq_context(p) ((p)->hardirq_context) |
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| 23 | # define trace_softirq_context(p) ((p)->softirq_context) |
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| 24 | # define trace_hardirqs_enabled(p) ((p)->hardirqs_enabled) |
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| 25 | # define trace_softirqs_enabled(p) ((p)->softirqs_enabled) |
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| 26 | # define trace_hardirq_enter() do { current->hardirq_context++; } while (0) |
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| 27 | # define trace_hardirq_exit() do { current->hardirq_context--; } while (0) |
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| 28 | # define lockdep_softirq_enter() do { current->softirq_context++; } while (0) |
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| 29 | # define lockdep_softirq_exit() do { current->softirq_context--; } while (0) |
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| 30 | # define INIT_TRACE_IRQFLAGS .softirqs_enabled = 1, |
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| 31 | #else |
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| 32 | # define trace_hardirqs_on() do { } while (0) |
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| 33 | # define trace_hardirqs_off() do { } while (0) |
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| 34 | # define trace_softirqs_on(ip) do { } while (0) |
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| 35 | # define trace_softirqs_off(ip) do { } while (0) |
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| 36 | # define trace_hardirq_context(p) 0 |
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| 37 | # define trace_softirq_context(p) 0 |
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| 38 | # define trace_hardirqs_enabled(p) 0 |
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| 39 | # define trace_softirqs_enabled(p) 0 |
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| 40 | # define trace_hardirq_enter() do { } while (0) |
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| 41 | # define trace_hardirq_exit() do { } while (0) |
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| 42 | # define lockdep_softirq_enter() do { } while (0) |
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| 43 | # define lockdep_softirq_exit() do { } while (0) |
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| 44 | # define INIT_TRACE_IRQFLAGS |
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| 45 | #endif |
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| 46 | |||
| 47 | #if defined(CONFIG_IRQSOFF_TRACER) || \ |
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| 48 | defined(CONFIG_PREEMPT_TRACER) |
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| 49 | extern void stop_critical_timings(void); |
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| 50 | extern void start_critical_timings(void); |
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| 51 | #else |
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| 52 | # define stop_critical_timings() do { } while (0) |
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| 53 | # define start_critical_timings() do { } while (0) |
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| 54 | #endif |
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| 55 | |||
| 56 | /* |
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| 57 | * Wrap the arch provided IRQ routines to provide appropriate checks. |
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| 58 | */ |
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| 59 | #define raw_local_irq_disable() arch_local_irq_disable() |
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| 60 | #define raw_local_irq_enable() arch_local_irq_enable() |
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| 61 | #define raw_local_irq_save(flags) \ |
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| 62 | do { \ |
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| 63 | typecheck(unsigned long, flags); \ |
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| 64 | flags = arch_local_irq_save(); \ |
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| 65 | } while (0) |
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| 66 | #define raw_local_irq_restore(flags) \ |
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| 67 | do { \ |
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| 68 | typecheck(unsigned long, flags); \ |
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| 69 | arch_local_irq_restore(flags); \ |
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| 70 | } while (0) |
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| 71 | #define raw_local_save_flags(flags) \ |
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| 72 | do { \ |
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| 73 | typecheck(unsigned long, flags); \ |
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| 74 | flags = arch_local_save_flags(); \ |
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| 75 | } while (0) |
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| 76 | #define raw_irqs_disabled_flags(flags) \ |
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| 77 | ({ \ |
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| 78 | typecheck(unsigned long, flags); \ |
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| 79 | arch_irqs_disabled_flags(flags); \ |
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| 80 | }) |
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| 81 | #define raw_irqs_disabled() (arch_irqs_disabled()) |
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| 82 | #define raw_safe_halt() arch_safe_halt() |
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| 83 | |||
| 84 | /* |
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| 85 | * The local_irq_*() APIs are equal to the raw_local_irq*() |
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| 86 | * if !TRACE_IRQFLAGS. |
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| 87 | */ |
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| 6082 | serge | 88 | #ifdef CONFIG_TRACE_IRQFLAGS |
| 5270 | serge | 89 | #define local_irq_enable() \ |
| 90 | do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0) |
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| 91 | #define local_irq_disable() \ |
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| 92 | do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0) |
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| 93 | #define local_irq_save(flags) \ |
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| 94 | do { \ |
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| 95 | raw_local_irq_save(flags); \ |
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| 96 | trace_hardirqs_off(); \ |
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| 97 | } while (0) |
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| 98 | |||
| 99 | |||
| 100 | #define local_irq_restore(flags) \ |
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| 101 | do { \ |
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| 102 | if (raw_irqs_disabled_flags(flags)) { \ |
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| 103 | raw_local_irq_restore(flags); \ |
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| 104 | trace_hardirqs_off(); \ |
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| 105 | } else { \ |
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| 106 | trace_hardirqs_on(); \ |
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| 107 | raw_local_irq_restore(flags); \ |
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| 108 | } \ |
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| 109 | } while (0) |
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| 110 | |||
| 111 | #define safe_halt() \ |
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| 112 | do { \ |
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| 113 | trace_hardirqs_on(); \ |
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| 114 | raw_safe_halt(); \ |
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| 115 | } while (0) |
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| 116 | |||
| 117 | |||
| 6082 | serge | 118 | #else /* !CONFIG_TRACE_IRQFLAGS */ |
| 5270 | serge | 119 | |
| 120 | #define local_irq_enable() do { raw_local_irq_enable(); } while (0) |
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| 121 | #define local_irq_disable() do { raw_local_irq_disable(); } while (0) |
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| 122 | #define local_irq_save(flags) \ |
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| 123 | do { \ |
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| 124 | raw_local_irq_save(flags); \ |
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| 125 | } while (0) |
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| 126 | #define local_irq_restore(flags) do { raw_local_irq_restore(flags); } while (0) |
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| 127 | #define safe_halt() do { raw_safe_halt(); } while (0) |
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| 128 | |||
| 6082 | serge | 129 | #endif /* CONFIG_TRACE_IRQFLAGS */ |
| 130 | |||
| 131 | #define local_save_flags(flags) raw_local_save_flags(flags) |
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| 132 | |||
| 133 | /* |
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| 134 | * Some architectures don't define arch_irqs_disabled(), so even if either |
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| 135 | * definition would be fine we need to use different ones for the time being |
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| 136 | * to avoid build issues. |
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| 137 | */ |
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| 138 | #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT |
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| 139 | #define irqs_disabled() \ |
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| 140 | ({ \ |
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| 141 | unsigned long _flags; \ |
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| 142 | raw_local_save_flags(_flags); \ |
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| 143 | raw_irqs_disabled_flags(_flags); \ |
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| 144 | }) |
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| 145 | #else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */ |
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| 146 | #define irqs_disabled() raw_irqs_disabled() |
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| 5270 | serge | 147 | #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ |
| 148 | |||
| 6082 | serge | 149 | #define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags) |
| 150 | |||
| 5270 | serge | 151 | #endif |