1 #define SMBUS_MEM_DEVICE_START 0x50
2 #define SMBUS_MEM_DEVICE_END 0x53
3 #define SMBUS_MEM_DEVICE_INC 1
5 static void spd_set_drb(void)
8 * Effects: Uses serial presence detect to set the
9 * DRB registers which holds the ending memory address assigned
12 unsigned end_of_memory;
15 end_of_memory = 0; /* in multiples of 8MiB */
16 device = SMBUS_MEM_DEVICE_START;
17 while (device <= SMBUS_MEM_DEVICE_END) {
18 unsigned side1_bits, side2_bits;
21 side1_bits = side2_bits = -1;
23 /* Compute the end address for the DRB register */
24 /* Only process dimms < 2GB (2^8 * 8MB) */
26 end_of_memory += (1 << side1_bits);
28 device += SMBUS_MEM_DEVICE_INC;