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static void spd_set_drb(void)
{
/*
* Effects: Uses serial presence detect to set the
* DRB registers which holds the ending memory address assigned
* to each DIMM.
*/
unsigned end_of_memory;
unsigned device;
end_of_memory = 0; /* in multiples of 8MiB */
device = 0x50;
while (device <= 0x53) {
unsigned side1_bits, side2_bits;
int byte, byte2;
side1_bits = side2_bits = -1;
/* rows */
byte = -1;
if (1) {
/* now I have the ram size in bits as a power of two (less 1) */
/* Make it mulitples of 8MB */
side1_bits -= 25;
}
/* Compute the end address for the DRB register */
/* Only process dimms < 2GB (2^8 * 8MB) */
if (1) {
end_of_memory += side1_bits;
}
__builtin_outl(end_of_memory, 0x1234);
if (1) {
end_of_memory += side2_bits;
}
}
}
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