coreboot-kgpe-d16/util/romcc/tests/simple_test45.c

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static void spd_set_memclk(void)
{
unsigned min_cycle_time;
unsigned device;
int new_cycle_time, new_latency;
int index;
int latency;
min_cycle_time = 0x50;
device = 0x50;
new_cycle_time = 0xa0;
new_latency = 5;
latency = 0;
for(index = 0; index < 3; index++, latency++) {
unsigned long loops;
loops = 1000000;
do {
unsigned short val;
val = __builtin_inw(0x10e0);
} while(--loops);
if (!loops) {
continue;
}
__builtin_outb(device, 0xe4);
__builtin_outb(index, 0xe8);
loops = 1000000;
while(--loops)
;
}
if (new_latency > 4){
return;
}
if (new_cycle_time > min_cycle_time) {
min_cycle_time = new_cycle_time;
}
}