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/*************************************************************************** 
 
  timer.c 
 
  Functions needed to generate timing and synchronization between several 
  CPUs. 
 
***************************************************************************/ 
 
#ifndef __TIMER_H__ 
#define __TIMER_H__ 
 
#ifdef __cplusplus 
extern "C" { 
#endif 
 
extern double cycles_to_sec[]; 
extern double sec_to_cycles[]; 
 
#define TIME_IN_HZ(hz)        (1.0 / (double)(hz)) 
#define TIME_IN_CYCLES(c,cpu) ((double)(c) * cycles_to_sec[cpu]) 
#define TIME_IN_SEC(s)        ((double)(s)) 
#define TIME_IN_MSEC(ms)      ((double)(ms) * (1.0 / 1000.0)) 
#define TIME_IN_USEC(us)      ((double)(us) * (1.0 / 1000000.0)) 
#define TIME_IN_NSEC(us)      ((double)(us) * (1.0 / 1000000000.0)) 
 
#define TIME_NOW              (0.0) 
#define TIME_NEVER            (1.0e30) 
 
#define TIME_TO_CYCLES(cpu,t) ((int)((t) * sec_to_cycles[cpu])) 
 
 
#define SUSPEND_REASON_HALT		0x0001 
#define SUSPEND_REASON_RESET	0x0002 
#define SUSPEND_REASON_SPIN		0x0004 
#define SUSPEND_REASON_TRIGGER	0x0008 
#define SUSPEND_REASON_DISABLE	0x0010 
#define SUSPEND_ANY_REASON		((UINT32)-1) 
 
 
void timer_init(void); 
void timer_free(void); 
void *timer_alloc(void (*callback)(int)); 
void timer_adjust(void *which, double duration, int param, double period); 
void timer_set(double duration, int param, void (*callback)(int)); 
void timer_remove(void *which); 
int timer_enable(void *which, int enable); 
double timer_timeelapsed(void *which); 
double timer_timeleft(void *which); 
double timer_get_time(void); 
double timer_starttime(void *which); 
double timer_firetime(void *which); 
int timer_schedule_cpu(int *cpu, int *cycles); 
void timer_update_cpu(int cpu, int ran); 
void timer_suspendcpu(int cpu, int suspend, int reason); 
void timer_holdcpu(int cpu, int hold, int reason); 
int timer_iscpususpended(int cpu, int reason); 
int timer_iscpuheld(int cpunum, int reason); 
void timer_suspendcpu_trigger(int cpu, int trigger); 
void timer_holdcpu_trigger(int cpu, int trigger); 
void timer_trigger(int trigger); 
double timer_get_overclock(int cpunum); 
void timer_set_overclock(int cpunum, double overclock); 
 
#ifdef __cplusplus 
} 
#endif 
 
#endif