util/romcc/tests/simple_test61.c

   1 static void spd_set_nbxcfg(void)
   2 {
   3         /*
   4          * Effects:     Uses serial presence detect to set the
   5          *              ECC support flags in the NBXCFG register
   6          * FIXME:       Check for illegal/unsupported ram configurations and abort
   7          */
   8         unsigned device;
   9
  10         for(device = 0x50; device <= 0x53; device += 1) {
  11                 int byte;
  12
  13                 byte = 0; /* Disable ECC */
  14                 /* 0 == None, 1 == Parity, 2 == ECC */
  15                 if (byte != 2) continue;
  16
  17                 /* set the device I'm talking too */
  18                 __builtin_outb(device, 0x1004);
  19
  20                 /* poll for transaction completion */
  21                 byte = __builtin_inb(0x10);
  22                 while(byte == 0) {
  23                         byte = __builtin_inb(0x10);
  24                 }
  25         }
  26 }