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/*
* Copyright (C) 1999 FSM Labs (http://www.fsmlabs.com/)
* Written by Cort Dougan <cort@fsmlabs.com>
*
*/
#ifndef __RTL_ARCH_TIME_H__
#define __RTL_ARCH_TIME_H__
typedef long long hrtime_t; /* high-resolution time type (signed 64-bit) */
static inline hrtime_t timespec_to_ns (const struct timespec *ts)
{
hrtime_t t;
t = ((hrtime_t)ts->tv_sec * (hrtime_t)NSECS_PER_SEC) +
(hrtime_t)ts->tv_nsec;
return t;
}
static inline struct timespec timespec_from_ns (hrtime_t t)
{
struct timespec ts;
/* We loose the upper 32-bits here -- Cort */
ts.tv_sec = (unsigned long)t/NSECS_PER_SEC;
ts.tv_nsec = (unsigned long)(t-(hrtime_t)ts.tv_sec *
(hrtime_t)NSECS_PER_SEC);
return ts;
}
#define rdtscl(x) __asm__ __volatile__ ("mftb %0": "=r" (x))
extern hrtime_t gethrtime(void); /* time in nanoseconds since bootup */
extern hrtime_t gethrtimeres(void); /* resolution of gethrtime() in ns */
#define RTL_CLOCK_ARCH_INITIALIZER { 0 }
struct rtl_clock_arch {
int istimerset;
};
extern __inline__ void __delay(unsigned int loops)
{
if (loops != 0)
__asm__ __volatile__("mtctr %0; 1: bdnz 1b" : :
"r" (loops) : "ctr");
}
static inline void rtl_delay(long nanoseconds)
{
unsigned long loops;
extern unsigned long loops_per_sec;
/* compute (usecs * 2^32 / 10^6) * loops_per_sec / 2^32 */
nanoseconds *= 0x10c6; /* 2^32 / 10^6 */
__asm__("mulhwu %0,%1,%2" : "=r" (loops) :
"r" (nanoseconds), "r" (loops_per_sec));
__delay(loops/1000);
}
#endif
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