106 lines
3.5 KiB
C
106 lines
3.5 KiB
C
/*
|
|
* include/linux/irqflags.h
|
|
*
|
|
* IRQ flags tracing: follow the state of the hardirq and softirq flags and
|
|
* provide callbacks for transitions between ON and OFF states.
|
|
*
|
|
* This file gets included from lowlevel asm headers too, to provide
|
|
* wrapped versions of the local_irq_*() APIs, based on the
|
|
* raw_local_irq_*() macros from the lowlevel headers.
|
|
*/
|
|
#ifndef _LINUX_TRACE_IRQFLAGS_H
|
|
#define _LINUX_TRACE_IRQFLAGS_H
|
|
|
|
#ifdef CONFIG_TRACE_IRQFLAGS
|
|
extern void trace_softirqs_on(unsigned long ip);
|
|
extern void trace_softirqs_off(unsigned long ip);
|
|
extern void trace_hardirqs_on(void);
|
|
extern void trace_hardirqs_off(void);
|
|
# define trace_hardirq_context(p) ((p)->hardirq_context)
|
|
# define trace_softirq_context(p) ((p)->softirq_context)
|
|
# define trace_hardirqs_enabled(p) ((p)->hardirqs_enabled)
|
|
# define trace_softirqs_enabled(p) ((p)->softirqs_enabled)
|
|
# define trace_hardirq_enter() do { current->hardirq_context++; } while (0)
|
|
# define trace_hardirq_exit() do { current->hardirq_context--; } while (0)
|
|
# define trace_softirq_enter() do { current->softirq_context++; } while (0)
|
|
# define trace_softirq_exit() do { current->softirq_context--; } while (0)
|
|
# define INIT_TRACE_IRQFLAGS .softirqs_enabled = 1,
|
|
#else
|
|
# define trace_hardirqs_on() do { } while (0)
|
|
# define trace_hardirqs_off() do { } while (0)
|
|
# define trace_softirqs_on(ip) do { } while (0)
|
|
# define trace_softirqs_off(ip) do { } while (0)
|
|
# define trace_hardirq_context(p) 0
|
|
# define trace_softirq_context(p) 0
|
|
# define trace_hardirqs_enabled(p) 0
|
|
# define trace_softirqs_enabled(p) 0
|
|
# define trace_hardirq_enter() do { } while (0)
|
|
# define trace_hardirq_exit() do { } while (0)
|
|
# define trace_softirq_enter() do { } while (0)
|
|
# define trace_softirq_exit() do { } while (0)
|
|
# define INIT_TRACE_IRQFLAGS
|
|
#endif
|
|
|
|
#if defined(CONFIG_IRQSOFF_TRACER) || \
|
|
defined(CONFIG_PREEMPT_TRACER)
|
|
extern void stop_critical_timings(void);
|
|
extern void start_critical_timings(void);
|
|
#else
|
|
# define stop_critical_timings() do { } while (0)
|
|
# define start_critical_timings() do { } while (0)
|
|
#endif
|
|
|
|
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
|
|
|
|
#include <asm/irqflags.h>
|
|
|
|
#define local_irq_enable() \
|
|
do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0)
|
|
#define local_irq_disable() \
|
|
do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
|
|
#define local_irq_save(flags) \
|
|
do { raw_local_irq_save(flags); trace_hardirqs_off(); } while (0)
|
|
|
|
#define local_irq_restore(flags) \
|
|
do { \
|
|
if (raw_irqs_disabled_flags(flags)) { \
|
|
raw_local_irq_restore(flags); \
|
|
trace_hardirqs_off(); \
|
|
} else { \
|
|
trace_hardirqs_on(); \
|
|
raw_local_irq_restore(flags); \
|
|
} \
|
|
} while (0)
|
|
#else /* !CONFIG_TRACE_IRQFLAGS_SUPPORT */
|
|
/*
|
|
* The local_irq_*() APIs are equal to the raw_local_irq*()
|
|
* if !TRACE_IRQFLAGS.
|
|
*/
|
|
# define raw_local_irq_disable() local_irq_disable()
|
|
# define raw_local_irq_enable() local_irq_enable()
|
|
# define raw_local_irq_save(flags) local_irq_save(flags)
|
|
# define raw_local_irq_restore(flags) local_irq_restore(flags)
|
|
#endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
|
|
|
|
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
|
|
#define safe_halt() \
|
|
do { \
|
|
trace_hardirqs_on(); \
|
|
raw_safe_halt(); \
|
|
} while (0)
|
|
|
|
#define local_save_flags(flags) raw_local_save_flags(flags)
|
|
|
|
#define irqs_disabled() \
|
|
({ \
|
|
unsigned long _flags; \
|
|
\
|
|
raw_local_save_flags(_flags); \
|
|
raw_irqs_disabled_flags(_flags); \
|
|
})
|
|
|
|
#define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
|
|
#endif /* CONFIG_X86 */
|
|
|
|
#endif
|