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/*
* (C) Copyright 2007 Michal Simek
*
* Michal SIMEK <monstr@monstr.eu>
*
* 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/microblaze_timer.h>
#include <asm/microblaze_intc.h>
volatile int timestamp = 0;
#ifdef CONFIG_SYS_TIMER_0
ulong get_timer (ulong base)
{
return (timestamp - base);
}
#else
ulong get_timer (ulong base)
{
return (timestamp++ - base);
}
#endif
#ifdef CONFIG_SYS_TIMER_0
void __udelay(unsigned long usec)
{
int i;
i = get_timer(0);
while ((get_timer(0) - i) < (usec / 1000))
;
}
#else
void __udelay(unsigned long usec)
{
unsigned int i;
for (i = 0; i < (usec * CONFIG_XILINX_CLOCK_FREQ / 10000000); i++)
;
}
#endif
#ifdef CONFIG_SYS_TIMER_0
microblaze_timer_t *tmr = (microblaze_timer_t *) (CONFIG_SYS_TIMER_0_ADDR);
void timer_isr (void *arg)
{
timestamp++;
tmr->control = tmr->control | TIMER_INTERRUPT;
}
int timer_init (void)
{
tmr->loadreg = CONFIG_SYS_TIMER_0_PRELOAD;
tmr->control = TIMER_INTERRUPT | TIMER_RESET;
tmr->control =
TIMER_ENABLE | TIMER_ENABLE_INTR | TIMER_RELOAD | TIMER_DOWN_COUNT;
timestamp = 0;
install_interrupt_handler (CONFIG_SYS_TIMER_0_IRQ, timer_isr, (void *)tmr);
return 0;
}
#endif
/*
* This function is derived from PowerPC code (read timebase as long long).
* On Microblaze 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 Microblaze it returns the number of timer ticks per second.
*/
ulong get_tbclk(void)
{
return CONFIG_SYS_HZ;
}
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