Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>master
Jean-Christophe PLAGNIOL-VILLARD
16 years ago
committed by
Wolfgang Denk
parent
f1d944e30e
commit
c20e28f49a
@ -1,158 +0,0 @@ |
||||
/*
|
||||
* (C) Copyright 2003 |
||||
* Texas Instruments <www.ti.com> |
||||
* |
||||
* (C) Copyright 2002 |
||||
* Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
||||
* Marius Groeger <mgroeger@sysgo.de> |
||||
* |
||||
* (C) Copyright 2002 |
||||
* Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
||||
* Alex Zuepke <azu@sysgo.de> |
||||
* |
||||
* (C) Copyright 2002-2004 |
||||
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> |
||||
* |
||||
* (C) Copyright 2004 |
||||
* Philippe Robin, ARM Ltd. <philippe.robin@arm.com> |
||||
* |
||||
* See file CREDITS for list of people who contributed to this |
||||
* project. |
||||
* |
||||
* This program is free software; you can redistribute it and/or |
||||
* modify it under the terms of the GNU General Public License as |
||||
* published by the Free Software Foundation; either version 2 of |
||||
* the License, or (at your option) any later version. |
||||
* |
||||
* This program is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
* GNU General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
||||
* MA 02111-1307 USA |
||||
*/ |
||||
|
||||
#include <common.h> |
||||
#include <arm946es.h> |
||||
|
||||
#define TIMER_LOAD_VAL 0xffffffff |
||||
extern void reset_cpu(ulong addr); |
||||
|
||||
#ifdef CONFIG_INTEGRATOR |
||||
/* Timer functionality supplied by Integrator board (AP or CP) */ |
||||
#else |
||||
|
||||
static ulong timestamp; |
||||
static ulong lastdec; |
||||
|
||||
/* nothing really to do with interrupts, just starts up a counter. */ |
||||
int interrupt_init (void) |
||||
{ |
||||
/* init the timestamp and lastdec value */ |
||||
reset_timer_masked(); |
||||
|
||||
return (0); |
||||
} |
||||
|
||||
/*
|
||||
* timer without interrupts |
||||
*/ |
||||
|
||||
void reset_timer (void) |
||||
{ |
||||
reset_timer_masked (); |
||||
} |
||||
|
||||
ulong get_timer (ulong base) |
||||
{ |
||||
return get_timer_masked () - base; |
||||
} |
||||
|
||||
void set_timer (ulong t) |
||||
{ |
||||
timestamp = t; |
||||
} |
||||
|
||||
/* delay x useconds AND perserve advance timstamp value */ |
||||
void udelay(unsigned long usec) |
||||
{ |
||||
udelay_masked(usec); |
||||
} |
||||
|
||||
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_raw (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; |
||||
} |
||||
|
||||
ulong get_timer_masked (void) |
||||
{ |
||||
return get_timer_raw() / TIMER_LOAD_VAL; |
||||
} |
||||
|
||||
/* waits specified delay value and resets timestamp */ |
||||
void udelay_masked (unsigned long usec) |
||||
{ |
||||
ulong tmo; |
||||
|
||||
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_CLOCK; /* 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_CLOCK; |
||||
tmo /= (1000*1000); |
||||
} |
||||
|
||||
reset_timer_masked (); /* set "advancing" timestamp to 0, set lastdec vaule */ |
||||
|
||||
while (get_timer_raw () < tmo) /* wait for time stamp to overtake tick number.*/ |
||||
/*NOP*/; |
||||
} |
||||
|
||||
/*
|
||||
* 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; |
||||
} |
||||
|
||||
#endif /* CONFIG_INTEGRATOR */ |
||||
Loading…
Reference in new issue