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Turn off the ia64 ITC timecounter when SMP is present since it has the

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same problem as the TSC on the x86 - ie: it is not synchronized.
#if 0 out some unused functions, ia64 doesn't calibrate clocks yet.
This commit is contained in:
Peter Wemm 2002-03-19 11:03:48 +00:00
parent 30171114b3
commit 4ff9e8d5e5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=92667
1 changed files with 10 additions and 0 deletions
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10
sys/ia64/ia64/clock.c
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@ -82,6 +82,7 @@ static int beeping = 0;
extern u_int64_t itc_frequency;
#ifndef SMP
static timecounter_get_t ia64_get_timecount;
static struct timecounter ia64_timecounter = {
@ -94,6 +95,7 @@ static struct timecounter ia64_timecounter = {
SYSCTL_OPAQUE(_debug, OID_AUTO, ia64_timecounter, CTLFLAG_RD,
&ia64_timecounter, sizeof(ia64_timecounter), "S,timecounter", "");
#endif
/* Values for timerX_state: */
#define RELEASED 0
@ -119,7 +121,9 @@ static u_int64_t scaled_ticks_per_cycle;
static u_int32_t max_cycles_per_tick;
static u_int32_t last_time;
#if 0 /* not used yet */
static u_int32_t calibrate_clocks(u_int32_t firmware_freq);
#endif
void
clockattach(kobj_t dev)
@ -185,8 +189,10 @@ cpu_initclocks()
scaled_ticks_per_cycle = ((u_int64_t)hz << FIX_SHIFT) / freq;
max_cycles_per_tick = 2*freq / hz;
#ifndef SMP
ia64_timecounter.tc_frequency = freq;
tc_init(&ia64_timecounter);
#endif
ia64_set_itm(ia64_get_itc() + (itc_frequency + hz/2) / hz);
ia64_set_itv(255); /* highest priority class */
@ -194,6 +200,7 @@ cpu_initclocks()
stathz = 128;
}
#if 0 /* not used yet */
static u_int32_t
calibrate_clocks(u_int32_t firmware_freq)
{
@ -247,6 +254,7 @@ calibrate_clocks(u_int32_t firmware_freq)
firmware_freq);
return (firmware_freq);
}
#endif
void
handleclock(void* arg)
@ -414,11 +422,13 @@ resettodr()
CLOCK_SET(clockdev, &ct);
}
#ifndef SMP
static unsigned
ia64_get_timecount(struct timecounter* tc)
{
return ia64_get_itc();
}
#endif
int
acquire_timer2(int mode)