mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-22 19:09:43 +09:00
94a3312920
Fixing the get_timer function to return time in miliseconds instead of ticks. Also fixed PXA boards to use the conventional value of 1000 for CONFIG_SYS_HZ. Signed-off-by: Micha Kalfon <smichak.uv@gmail.com>
126 lines
2.6 KiB
C
126 lines
2.6 KiB
C
/*
|
|
* (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>
|
|
*
|
|
* 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 <asm/arch/pxa-regs.h>
|
|
|
|
#ifdef CONFIG_USE_IRQ
|
|
#error: interrupts not implemented yet
|
|
#endif
|
|
|
|
#if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS)
|
|
#define TIMER_FREQ_HZ 3250000
|
|
#elif defined(CONFIG_PXA250)
|
|
#define TIMER_FREQ_HZ 3686400
|
|
#else
|
|
#error "Timer frequency unknown - please config PXA CPU type"
|
|
#endif
|
|
|
|
int interrupt_init (void)
|
|
{
|
|
/* nothing happens here - we don't setup any IRQs */
|
|
return (0);
|
|
}
|
|
|
|
void reset_timer (void)
|
|
{
|
|
reset_timer_masked ();
|
|
}
|
|
|
|
ulong get_timer (ulong base)
|
|
{
|
|
return get_timer_masked () - base;
|
|
}
|
|
|
|
void set_timer (ulong t)
|
|
{
|
|
/* nop */
|
|
}
|
|
|
|
void udelay (unsigned long usec)
|
|
{
|
|
udelay_masked (usec);
|
|
}
|
|
|
|
|
|
void reset_timer_masked (void)
|
|
{
|
|
OSCR = 0;
|
|
}
|
|
|
|
ulong get_timer_masked (void)
|
|
{
|
|
unsigned long long ticks = get_ticks();
|
|
|
|
return (((ticks / TIMER_FREQ_HZ) * 1000) +
|
|
((ticks % TIMER_FREQ_HZ) * 1000) / TIMER_FREQ_HZ);
|
|
}
|
|
|
|
void udelay_masked (unsigned long usec)
|
|
{
|
|
ulong tmo;
|
|
ulong endtime;
|
|
signed long diff;
|
|
|
|
if (usec >= 1000) {
|
|
tmo = usec / 1000;
|
|
tmo *= TIMER_FREQ_HZ;
|
|
tmo /= 1000;
|
|
} else {
|
|
tmo = usec * TIMER_FREQ_HZ;
|
|
tmo /= (1000*1000);
|
|
}
|
|
|
|
endtime = get_ticks() + tmo;
|
|
|
|
do {
|
|
ulong now = get_ticks();
|
|
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 OSCR;
|
|
}
|
|
|
|
/*
|
|
* 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 = TIMER_FREQ_HZ;
|
|
return tbclk;
|
|
}
|