util/romcc/tests/simple_test45.c

   1 static void spd_set_memclk(void)
   2 {
   3         unsigned min_cycle_time;
   4         unsigned device;
   5         int new_cycle_time, new_latency;
   6         int index;
   7         int latency;
   8
   9         min_cycle_time = 0x50;
  10         device = 0x50;
  11         new_cycle_time = 0xa0;
  12         new_latency = 5;
  13
  14
  15         latency = 0;
  16         for(index = 0; index < 3; index++, latency++) {
  17                 unsigned long loops;
  18                 loops = 1000000;
  19                 do {
  20                         unsigned short val;
  21                         val = __builtin_inw(0x10e0);
  22                 } while(--loops);
  23                 if (!loops) {
  24                         continue;
  25                 }
  26
  27                 __builtin_outb(device, 0xe4);
  28                 __builtin_outb(index, 0xe8);
  29
  30                 loops = 1000000;
  31                 while(--loops)
  32                         ;
  33         }
  34         if (new_latency > 4){
  35                 return;
  36         }
  37
  38         if (new_cycle_time > min_cycle_time) {
  39                 min_cycle_time = new_cycle_time;
  40         }
  41 }