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bios/sdram: add memspeed

This commit is contained in:
Florent Kermarrec 2020-01-10 14:25:46 +01:00
parent fa22d6aa82
commit f70dd48279
1 changed files with 46 additions and 0 deletions
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46
litex/soc/software/bios/sdram.c
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@ -841,6 +841,51 @@ static int memtest_addr(void)
return errors;
}
static void memspeed(void)
{
volatile unsigned int *array = (unsigned int *)MAIN_RAM_BASE;
int i;
unsigned int start, end;
unsigned long write_speed;
unsigned long read_speed;
__attribute__((unused)) unsigned int data;
/* init timer */
timer0_en_write(0);
timer0_reload_write(0);
timer0_load_write(0xffffffff);
timer0_en_write(1);
/* write speed */
timer0_update_value_write(1);
start = timer0_value_read();
for(i=0;i<MEMTEST_DATA_SIZE/4;i++) {
array[i] = i;
}
timer0_update_value_write(1);
end = timer0_value_read();
write_speed = (8*MEMTEST_DATA_SIZE*(CONFIG_CLOCK_FREQUENCY/1000000))/(start - end);
/* flush CPU and L2 caches */
flush_cpu_dcache();
#ifdef CONFIG_L2_SIZE
flush_l2_cache();
#endif
/* read speed */
timer0_en_write(1);
timer0_update_value_write(1);
start = timer0_value_read();
for(i=0;i<MEMTEST_DATA_SIZE/4;i++) {
data = array[i];
}
timer0_update_value_write(1);
end = timer0_value_read();
read_speed = (8*MEMTEST_DATA_SIZE*(CONFIG_CLOCK_FREQUENCY/1000000))/(start - end);
printf("Memspeed Writes: %dMbps Reads: %dMbps\n", write_speed, read_speed);
}
int memtest(void)
{
int bus_errors, data_errors, addr_errors;
@ -861,6 +906,7 @@ int memtest(void)
return 0;
else {
printf("Memtest OK\n");
memspeed();
return 1;
}
}