/*

 * 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

#include <linux/typecheck.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 {						\

		typecheck(unsigned long, flags);	\

		raw_local_irq_save(flags);		\

		trace_hardirqs_off();			\

	} while (0)

#define local_irq_restore(flags)			\

	do {						\

		typecheck(unsigned long, flags);	\

		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)			\

	do {						\

		typecheck(unsigned long, flags);	\

		local_irq_save(flags);			\

	} while (0)

# define raw_local_irq_restore(flags)			\

	do {						\

		typecheck(unsigned long, flags);	\

		local_irq_restore(flags);		\

	} while (0)

#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)				\

	do {						\

		typecheck(unsigned long, flags);	\

		raw_local_save_flags(flags);		\

	} while (0)

#define irqs_disabled()						\

({								\

	unsigned long _flags;					\

								\

	raw_local_save_flags(_flags);				\

	raw_irqs_disabled_flags(_flags);			\

})

#define irqs_disabled_flags(flags)		\

({						\

	typecheck(unsigned long, flags);	\

	raw_irqs_disabled_flags(flags);		\

})

#endif		/* CONFIG_X86 */

#endif