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yaml
---
r: 148578
b: refs/heads/master
c: 9b9bfde
h: refs/heads/master
v: v3
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Graf Yang authored and Mike Frysinger committed Jun 12, 2009
1 parent 36834b8 commit 61eea91
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Showing 3 changed files with 21 additions and 35 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: ffc4d8bc4435918d2fd1e840b0bf985e7b56f0d3
refs/heads/master: 9b9bfded623cffb4259b95e5419404015dba361f
1 change: 1 addition & 0 deletions trunk/arch/blackfin/Kconfig
Original file line number Diff line number Diff line change
Expand Up @@ -223,6 +223,7 @@ endchoice

config SMP
depends on BF561
select GENERIC_TIME
bool "Symmetric multi-processing support"
---help---
This enables support for systems with more than one CPU,
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53 changes: 19 additions & 34 deletions trunk/arch/blackfin/kernel/time.c
Original file line number Diff line number Diff line change
Expand Up @@ -24,14 +24,10 @@

static struct irqaction bfin_timer_irq = {
.name = "Blackfin Timer Tick",
#ifdef CONFIG_IRQ_PER_CPU
.flags = IRQF_DISABLED | IRQF_PERCPU,
#else
.flags = IRQF_DISABLED
#endif
};

#if defined(CONFIG_TICKSOURCE_GPTMR0) || defined(CONFIG_IPIPE)
#if defined(CONFIG_IPIPE)
void __init setup_system_timer0(void)
{
/* Power down the core timer, just to play safe. */
Expand Down Expand Up @@ -74,7 +70,7 @@ void __init setup_core_timer(void)
static void __init
time_sched_init(irqreturn_t(*timer_routine) (int, void *))
{
#if defined(CONFIG_TICKSOURCE_GPTMR0) || defined(CONFIG_IPIPE)
#if defined(CONFIG_IPIPE)
setup_system_timer0();
bfin_timer_irq.handler = timer_routine;
setup_irq(IRQ_TIMER0, &bfin_timer_irq);
Expand All @@ -94,7 +90,7 @@ static unsigned long gettimeoffset(void)
unsigned long offset;
unsigned long clocks_per_jiffy;

#if defined(CONFIG_TICKSOURCE_GPTMR0) || defined(CONFIG_IPIPE)
#if defined(CONFIG_IPIPE)
clocks_per_jiffy = bfin_read_TIMER0_PERIOD();
offset = bfin_read_TIMER0_COUNTER() / \
(((clocks_per_jiffy + 1) * HZ) / USEC_PER_SEC);
Expand Down Expand Up @@ -133,36 +129,25 @@ irqreturn_t timer_interrupt(int irq, void *dummy)
static long last_rtc_update;

write_seqlock(&xtime_lock);
#if defined(CONFIG_TICKSOURCE_GPTMR0) && !defined(CONFIG_IPIPE)
do_timer(1);

/*
* TIMIL0 is latched in __ipipe_grab_irq() when the I-Pipe is
* enabled.
* If we have an externally synchronized Linux clock, then update
* CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
* called as close as possible to 500 ms before the new second starts.
*/
if (get_gptimer_status(0) & TIMER_STATUS_TIMIL0) {
#endif
do_timer(1);

/*
* If we have an externally synchronized Linux clock, then update
* CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
* called as close as possible to 500 ms before the new second starts.
*/
if (ntp_synced() &&
xtime.tv_sec > last_rtc_update + 660 &&
(xtime.tv_nsec / NSEC_PER_USEC) >=
500000 - ((unsigned)TICK_SIZE) / 2
&& (xtime.tv_nsec / NSEC_PER_USEC) <=
500000 + ((unsigned)TICK_SIZE) / 2) {
if (set_rtc_mmss(xtime.tv_sec) == 0)
last_rtc_update = xtime.tv_sec;
else
/* Do it again in 60s. */
last_rtc_update = xtime.tv_sec - 600;
}
#if defined(CONFIG_TICKSOURCE_GPTMR0) && !defined(CONFIG_IPIPE)
set_gptimer_status(0, TIMER_STATUS_TIMIL0);
if (ntp_synced() &&
xtime.tv_sec > last_rtc_update + 660 &&
(xtime.tv_nsec / NSEC_PER_USEC) >=
500000 - ((unsigned)TICK_SIZE) / 2
&& (xtime.tv_nsec / NSEC_PER_USEC) <=
500000 + ((unsigned)TICK_SIZE) / 2) {
if (set_rtc_mmss(xtime.tv_sec) == 0)
last_rtc_update = xtime.tv_sec;
else
/* Do it again in 60s. */
last_rtc_update = xtime.tv_sec - 600;
}
#endif
write_sequnlock(&xtime_lock);

#ifdef CONFIG_IPIPE
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