ah, ok, looking at this lspci.
I don't believe there is support in linuxbios for calculcating the SMA size on this chipset. There is on e.g. sis 630, so on sis 630 sizeram() we figure out the SMA window size and reduce the ram size by that amount.
Munjun, how do we compute SMA size on this chipset? can you send me C code to do this? This is a needed upgrade to the chipset support.