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target/arm: Remove redundant scaling of nexttick 

The corner-case codepath was adjusting nexttick such that overflow
wouldn't occur when timer_mod() scaled the value back up. Remove a use
of GTIMER_SCALE and avoid unnecessary operations by calling
timer_mod_ns() directly.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-id: f8c680720e3abe55476e6d9cb604ad27fdbeb2e0.1576215453.git-series.andrew@aj.id.au
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Andrew Jeffery 2019-12-20 14:02:59 +00:00 committed by Peter Maydell
parent 8e5943260a
commit 4a0245b625
1 changed files with 3 additions and 2 deletions
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5
target/arm/helper.c
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@ -2486,9 +2486,10 @@ static void gt_recalc_timer(ARMCPU *cpu, int timeridx)
* timer expires we will reset the timer for any remaining period.
*/
if (nexttick > INT64_MAX / GTIMER_SCALE) {
nexttick = INT64_MAX / GTIMER_SCALE;
timer_mod_ns(cpu->gt_timer[timeridx], INT64_MAX);
} else {
timer_mod(cpu->gt_timer[timeridx], nexttick);
}
timer_mod(cpu->gt_timer[timeridx], nexttick);
trace_arm_gt_recalc(timeridx, irqstate, nexttick);
} else {
/* Timer disabled: ISTATUS and timer output always clear */