On Tue, Sep 1, 2009 at 2:15 PM, Ralf Grosse Boerger<[email protected]> wrote: > Hi, > > this a reply to the following message: > http://www.coreboot.org/pipermail/coreboot/2009-August/051629.html > [I am not subscribed to this list.] > > The sporadic boot problems ("FIXME! CPU Version unknown or not supported!") > are caused by a race condition in Get_NB32(). > > This function performs a read operation to the PCI configuration space via > port CF8/CFC. > > u32 Get_NB32(u32 dev, u32 reg) > { > u32 addr; > > addr = (dev>>4) | (reg & 0xFF) | ((reg & 0xf00)<<16); > outl((1<<31) | (addr & ~3), 0xcf8); > > return inl(0xcfc); > } > > As ports CF8/CFC are shared across cores (maybe even sockets?) concurrent > accesses from different cores may yield random results.
OK, let's start this discussion again. Can we at least answer this question. Ports CF8/CFC are shared across - sockets - cores I am betting they are not shared across sockets, and would be surprised if they are shared across cores but am willing to believe it. Anybody? ron -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
