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software/liblitedram: Fixup overflow in BIST speed math 

With decent burst length, fast RAM and fast clock rate,
the intermediate result can easily overflow 32 bits.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This commit is contained in:
Sylvain Munaut 2022-04-26 23:26:11 +02:00
parent 3959ca39d4
commit 6ec7a24731
1 changed files with 1 additions and 1 deletions
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2
litex/soc/software/liblitedram/bist.c
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@ -131,7 +131,7 @@ void sdram_bist_loop(uint32_t loop, uint32_t burst_length, uint32_t random) {
static uint32_t compute_speed_mibs(uint32_t length, uint32_t ticks) { static uint32_t compute_speed_mibs(uint32_t length, uint32_t ticks) {
uint32_t speed; uint32_t speed;
//printf("(%u, %u)", length, ticks); //printf("(%u, %u)", length, ticks);
speed = length*(CONFIG_CLOCK_FREQUENCY/(1024*1024))/ticks; speed = (uint64_t)length*(CONFIG_CLOCK_FREQUENCY/(1024*1024))/ticks;
return speed; return speed;
} }