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armv7-a timer:fix timer overflow.

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Signed-off-by: ligd <liguiding1@xiaomi.com>
This commit is contained in:
ligd 2023-12-26 22:56:29 +08:00 committed by Xiang Xiao
parent 8eddf00212
commit 5aeab4a36c
1 changed files with 3 additions and 1 deletions
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4
arch/arm/src/armv7-r/arm_timer.c
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@ -143,7 +143,9 @@ static inline void arm_timer_set_cval(uint64_t cval)
static inline uint64_t nsec_from_count(uint64_t count, uint32_t freq) static inline uint64_t nsec_from_count(uint64_t count, uint32_t freq)
{ {
return (uint64_t)count * NSEC_PER_SEC / freq; uint64_t sec = count / freq;
uint64_t nsec = (count % freq) * NSEC_PER_SEC / freq;
return sec * NSEC_PER_SEC + nsec;
} }
static inline uint64_t nsec_to_count(uint32_t nsec, uint32_t freq) static inline uint64_t nsec_to_count(uint32_t nsec, uint32_t freq)