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nexedi
linux
Commits
d4f7a112
Commit
d4f7a112
authored
Jan 06, 2003
by
Tom Rini
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PPC32: Fix a delay which could occur when booting on machines
without an RTC.
parent
87113c38
Changes
1
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1 changed file
with
9 additions
and
11 deletions
+9
-11
arch/ppc/kernel/time.c
arch/ppc/kernel/time.c
+9
-11
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arch/ppc/kernel/time.c
View file @
d4f7a112
...
...
@@ -286,13 +286,11 @@ void do_settimeofday(struct timeval *tv)
write_unlock_irqrestore
(
&
xtime_lock
,
flags
);
}
/* This function is only called on the boot processor */
void
__init
time_init
(
void
)
{
time_t
sec
,
old_sec
;
unsigned
old_stamp
,
stamp
,
elapsed
;
/* This function is only called on the boot processor */
unsigned
long
flags
;
if
(
ppc_md
.
time_init
!=
NULL
)
time_offset
=
ppc_md
.
time_init
();
...
...
@@ -309,31 +307,31 @@ void __init time_init(void)
/* Now that the decrementer is calibrated, it can be used in case the
* clock is stuck, but the fact that we have to handle the 601
* makes things more complex. Repeatedly read the RTC until the
* next second boundary to try to achieve some precision...
* next second boundary to try to achieve some precision. If there
* is no RTC, we still need to set tb_last_stamp and
* last_jiffy_stamp(cpu 0) to the current stamp.
*/
stamp
=
get_native_tbl
();
if
(
ppc_md
.
get_rtc_time
)
{
stamp
=
get_native_tbl
();
sec
=
ppc_md
.
get_rtc_time
();
elapsed
=
0
;
do
{
old_stamp
=
stamp
;
old_sec
=
sec
;
stamp
=
get_native_tbl
();
if
(
__USE_RTC
()
&&
stamp
<
old_stamp
)
old_stamp
-=
1000000000
;
if
(
__USE_RTC
()
&&
stamp
<
old_stamp
)
old_stamp
-=
1000000000
;
elapsed
+=
stamp
-
old_stamp
;
sec
=
ppc_md
.
get_rtc_time
();
}
while
(
sec
==
old_sec
&&
elapsed
<
2
*
HZ
*
tb_ticks_per_jiffy
);
if
(
sec
==
old_sec
)
{
if
(
sec
==
old_sec
)
printk
(
"Warning: real time clock seems stuck!
\n
"
);
}
write_lock_irqsave
(
&
xtime_lock
,
flags
);
xtime
.
tv_sec
=
sec
;
last_jiffy_stamp
(
0
)
=
tb_last_stamp
=
stamp
;
xtime
.
tv_nsec
=
0
;
/* No update now, we just read the time from the RTC ! */
last_rtc_update
=
xtime
.
tv_sec
;
write_unlock_irqrestore
(
&
xtime_lock
,
flags
);
}
last_jiffy_stamp
(
0
)
=
tb_last_stamp
=
stamp
;
/* Not exact, but the timer interrupt takes care of this */
set_dec
(
tb_ticks_per_jiffy
);
...
...
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