diff options
Diffstat (limited to 'arch/arm/cpu/arm926ejs/versatile/timer.c')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/versatile/timer.c | 116 | 
1 files changed, 0 insertions, 116 deletions
| diff --git a/arch/arm/cpu/arm926ejs/versatile/timer.c b/arch/arm/cpu/arm926ejs/versatile/timer.c index 870f927e5..5d694d85e 100644 --- a/arch/arm/cpu/arm926ejs/versatile/timer.c +++ b/arch/arm/cpu/arm926ejs/versatile/timer.c @@ -21,16 +21,6 @@  #include <common.h> -#define TIMER_LOAD_VAL 0xffffffff - -/* macro to read the 32 bit timer */ -#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4)) - -DECLARE_GLOBAL_DATA_PTR; - -#define timestamp gd->arch.tbl -#define lastdec gd->arch.lastinc -  #define TIMER_ENABLE	(1 << 7)  #define TIMER_MODE_MSK	(1 << 6)  #define TIMER_MODE_FR	(0 << 6) @@ -69,112 +59,6 @@ int timer_init (void)  	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = tmr_ctrl_val; -	/* init the timestamp and lastdec value */ -	reset_timer_masked(); -  	return 0;  } -/* - * timer without interrupts - */ -ulong get_timer (ulong base) -{ -	return get_timer_masked () - base; -} - -/* delay x useconds AND preserve advance timestamp value */ -void __udelay (unsigned long usec) -{ -	ulong tmo, tmp; - -	if(usec >= 1000){		/* if "big" number, spread normalization to seconds */ -		tmo = usec / 1000;	/* start to normalize for usec to ticks per sec */ -		tmo *= CONFIG_SYS_HZ;	/* find number of "ticks" to wait to achieve target */ -		tmo /= 1000;		/* finish normalize. */ -	}else{				/* else small number, don't kill it prior to HZ multiply */ -		tmo = usec * CONFIG_SYS_HZ; -		tmo /= (1000*1000); -	} - -	tmp = get_timer (0);		/* get current timestamp */ -	if( (tmo + tmp + 1) < tmp )	/* if setting this fordward will roll time stamp */ -		reset_timer_masked ();	/* reset "advancing" timestamp to 0, set lastdec value */ -	else -		tmo += tmp;		/* else, set advancing stamp wake up time */ - -	while (get_timer_masked () < tmo)/* loop till event */ -		/*NOP*/; -} - -void reset_timer_masked (void) -{ -	/* reset time */ -	lastdec = READ_TIMER;  /* capure current decrementer value time */ -	timestamp = 0;	       /* start "advancing" time stamp from 0 */ -} - -ulong get_timer_masked (void) -{ -	ulong now = READ_TIMER;		/* current tick value */ - -	if (lastdec >= now) {		/* normal mode (non roll) */ -		/* normal mode */ -		timestamp += lastdec - now; /* move stamp fordward with absoulte diff ticks */ -	} else {			/* we have overflow of the count down timer */ -		/* nts = ts + ld + (TLV - now) -		 * ts=old stamp, ld=time that passed before passing through -1 -		 * (TLV-now) amount of time after passing though -1 -		 * nts = new "advancing time stamp"...it could also roll and cause problems. -		 */ -		timestamp += lastdec + TIMER_LOAD_VAL - now; -	} -	lastdec = now; - -	return timestamp; -} - -/* waits specified delay value and resets timestamp */ -void udelay_masked (unsigned long usec) -{ -	ulong tmo; -	ulong endtime; -	signed long diff; - -	if (usec >= 1000) {		/* if "big" number, spread normalization to seconds */ -		tmo = usec / 1000;	/* start to normalize for usec to ticks per sec */ -		tmo *= CONFIG_SYS_HZ;		/* find number of "ticks" to wait to achieve target */ -		tmo /= 1000;		/* finish normalize. */ -	} else {			/* else small number, don't kill it prior to HZ multiply */ -		tmo = usec * CONFIG_SYS_HZ; -		tmo /= (1000*1000); -	} - -	endtime = get_timer_masked () + tmo; - -	do { -		ulong now = get_timer_masked (); -		diff = endtime - now; -	} while (diff >= 0); -} - -/* - * This function is derived from PowerPC code (read timebase as long long). - * On ARM it just returns the timer value. - */ -unsigned long long get_ticks(void) -{ -	return get_timer(0); -} - -/* - * This function is derived from PowerPC code (timebase clock frequency). - * On ARM it returns the number of timer ticks per second. - */ -ulong get_tbclk (void) -{ -	ulong tbclk; - -	tbclk = CONFIG_SYS_HZ; -	return tbclk; -} |