2010/7/31 Stefan Reinauer <[email protected]>: > On 7/31/10 4:56 PM, Zheng Bao wrote: > > The board tht I am working on has 2 process. Each of them has 6 DIMM slots. > If you > plug 1 dimm into each slot, the SPD address will be, > Channel PCB > ---------------- > P0: > DIMMA0 50h > DIMMA1 51h > DIMMA2 52h > DIMMB0 53h > DIMMB1 54h > DIMMB2 55h > P1: > DIMMA0 50h > DIMMA1 51h > DIMMA2 52h > DIMMB0 53h > DIMMB1 54h > DIMMB2 55h > If you plug 1 dimm in P0DIMMA0 and the other in P1DIMA0, the SPD address > will be 50h and 55h. > So I am confused. If we got an active spd 0x50 on the SMBUS, what will it > be? > It seems that we can not plug more that 8 dimm even if we have 12 slots, > correct? > > Zheng > > > > There is probably an smbus hub for switching between the P0 and P1 SPD ROMs. > > Check out src/mainboard/tyan/s4880/romstage.c for an example of a board with > smbus hub.
Another example is in the serengeti_cheetah romstage.c activate_spd_rom(). Marc -- http://se-eng.com -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
