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#ifndef _FEATHER_TRACE_H_
#define _FEATHER_TRACE_H_
#include <asm/atomic.h>
int ft_enable_event(unsigned long id);
int ft_disable_event(unsigned long id);
int ft_is_event_enabled(unsigned long id);
int ft_disable_all_events(void);
/* atomic_* funcitons are inline anyway */
static inline int fetch_and_inc(int *val)
{
return atomic_add_return(1, (atomic_t*) val) - 1;
}
static inline int fetch_and_dec(int *val)
{
return atomic_sub_return(1, (atomic_t*) val) + 1;
}
/* Don't use rewriting implementation if kernel text pages are read-only.
* Ftrace gets around this by using the identity mapping, but that's more
* effort that is warrented right now for Feather-Trace.
* Eventually, it may make sense to replace Feather-Trace with ftrace.
*/
#if defined(CONFIG_ARCH_HAS_FEATHER_TRACE) && !defined(CONFIG_DEBUG_RODATA)
#include <asm/feather_trace.h>
#else /* !__ARCH_HAS_FEATHER_TRACE */
/* provide default implementation */
#include <asm/timex.h> /* for get_cycles() */
static inline unsigned long long ft_timestamp(void)
{
return get_cycles();
}
#define feather_callback
#define MAX_EVENTS 1024
extern int ft_events[MAX_EVENTS];
#define ft_event(id, callback) \
if (ft_events[id]) callback();
#define ft_event0(id, callback) \
if (ft_events[id]) callback(id);
#define ft_event1(id, callback, param) \
if (ft_events[id]) callback(id, param);
#define ft_event2(id, callback, param, param2) \
if (ft_events[id]) callback(id, param, param2);
#define ft_event3(id, callback, p, p2, p3) \
if (ft_events[id]) callback(id, p, p2, p3);
#endif /* __ARCH_HAS_FEATHER_TRACE */
#endif
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