/* * rtl_time.h * * RTLinux architecture-independent clock support * * Copyright (C) 1999 Michael Barabanov * * Fixed overflow in timespec_add_ns Josep Vidal (OCERA) *  */#ifndef __RTL_TIME__#define __RTL_TIME__#define NSECS_PER_SEC 1000000000#define HRTIME_INFINITY 0x7fffFfffFfffFfffLL#ifdef __KERNEL__#include <asm/ptrace.h>#include <rtl_conf.h>extern int *(*__errno_location_ptr)(void);extern int *__errno_location(void);#define errno (*__errno_location())/* for timespec */#include <linux/posix_types.h>#include <linux/time.h>#endif#include <arch/rtl_time.h>#define HRT_FROM_NS(x) (x)#define HRTICKS_PER_SEC 1000000000#ifndef HRT_FROM_8254#define HRT_FROM_8254(x) ((x) * 838)#endif#ifndef HRT_TO_8254#define HRT_TO_8254(x) ((x) / 838)#endif#ifdef __KERNEL__#include <rtl_spinlock.h>typedef void (* clock_irq_handler_t)(struct pt_regs *r);enum { RTL_CLOCK_MODE_UNINITIALIZED = 1, RTL_CLOCK_MODE_ONESHOT,RTL_CLOCK_MODE_PERIODIC};struct rtl_clock {	int (*init) (struct rtl_clock *);	void (*uninit) (struct rtl_clock *);	hrtime_t (*gethrtime)(struct rtl_clock *);	int (*sethrtime)(struct rtl_clock *, hrtime_t t);	int (*settimer)(struct rtl_clock *, hrtime_t interval);	int (*settimermode)(struct rtl_clock *, int mode);	clock_irq_handler_t handler;	int mode;	hrtime_t resolution;	hrtime_t value;	hrtime_t delta;	pthread_spinlock_t lock;	struct rtl_clock_arch arch;};typedef struct rtl_clock *clockid_t;extern struct rtl_clock RTL_CLOCK_DEFAULTS;extern int rtl_setclockhandler (clockid_t h, clock_irq_handler_t fn);extern int rtl_unsetclockhandler (clockid_t h);extern int rtl_clockadjust (clockid_t clock_id, hrtime_t delta);/* scheduler interface */static inline hrtime_t clock_gethrtime (clockid_t clock_id){	return clock_id->gethrtime (clock_id);}extern clockid_t rtl_getbestclock (unsigned int cpu);/* end of scheduler interface */extern int rtl_init_standard_clocks(void);extern void rtl_cleanup_standard_clocks(void);#ifdef CONFIG_RTL_CLOCK_GPOSextern clockid_t CLOCK_GPOS;#endif#endif /* __KERNEL__ *//* convenience functions */#define timespec_normalize(t) {\        if ((t)->tv_nsec >= NSECS_PER_SEC) { \                (t)->tv_nsec -= NSECS_PER_SEC; \                (t)->tv_sec++; \        } else if ((t)->tv_nsec < 0) { \                (t)->tv_nsec += NSECS_PER_SEC; \                (t)->tv_sec--; \        } \}#define timespec_add(t1, t2) do { \	(t1)->tv_nsec += (t2)->tv_nsec;  \	(t1)->tv_sec += (t2)->tv_sec; \	timespec_normalize(t1);\} while (0)#define timespec_sub(t1, t2) do { \	(t1)->tv_nsec -= (t2)->tv_nsec;  \	(t1)->tv_sec -= (t2)->tv_sec; \	timespec_normalize(t1);\} while (0)#define TWOSECONDS (NSECS_PER_SEC*2)#define timespec_add_ns(t,n) do { \  long long aux=(t)->tv_nsec+(n);\  \  if ((aux > TWOSECONDS) || (aux < -TWOSECONDS)) /*check overflow*/ {\    (t)->tv_nsec +=((n) % NSECS_PER_SEC) ; \    (t)->tv_sec += ((n) / NSECS_PER_SEC); \  } else {  (t)->tv_nsec=aux; }\  \  timespec_normalize(t); \}  while (0)#define timespec_nz(t) ((t)->tv_sec != 0 || (t)->tv_nsec != 0)#define timespec_lt(t1, t2) ((t1)->tv_sec < (t2)->tv_sec || ((t1)->tv_sec == (t2)->tv_sec && (t1)->tv_nsec < (t2)->tv_nsec))#define timespec_gt(t1, t2) (timespec_lt(t2, t1))#define timespec_ge(t1, t2) (!timespec_lt(t1, t2))#define timespec_le(t1, t2) (!timespec_gt(t1, t2))#define timespec_eq(t1, t2) ((t1)->tv_sec == (t2)->tv_sec && (t1)->tv_nsec == (t2)->tv_nsec)#endif