Author: jhibbits
Date: Sat Apr 13 02:29:30 2019
New Revision: 346172
URL: https://svnweb.freebsd.org/changeset/base/346172
Log:
powerpc: Add file forgotten in r346144
Forgot to add the changes for DELAY(), which lowers priority during the
delay period. Also, mark the timebase read as volatile so newer GCC does
not optimize it away, as it reportedly does currently.
MFC after: 2 weeks
MFC with: r346144
Modified:
head/sys/powerpc/powerpc/clock.c
Modified: head/sys/powerpc/powerpc/clock.c
==============================================================================
--- head/sys/powerpc/powerpc/clock.c Sat Apr 13 00:54:56 2019
(r346171)
+++ head/sys/powerpc/powerpc/clock.c Sat Apr 13 02:29:30 2019
(r346172)
@@ -303,13 +303,16 @@ decr_get_timecount(struct timecounter *tc)
void
DELAY(int n)
{
- u_quad_t tb, ttb;
+ volatile u_quad_t tb;
+ u_quad_t ttb;
TSENTER();
tb = mftb();
ttb = tb + howmany((uint64_t)n * 1000000, ps_per_tick);
+ nop_prio_vlow();
while (tb < ttb)
tb = mftb();
+ nop_prio_medium();
TSEXIT();
}
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