Re: [coreboot] ram init help on the i82830

[Corey Osgood]

On Tue, May 27, 2008 at 10:27 PM, Joseph Smith  wrote:
> Hello,
> Now that I got coreboot running on the IP1000, I finally am able to test
> out the so-dimm socket. I maxed out the slot with a big 512MB so-dimm. I
> don't think the "for" statement we came up with is working correctly:
>    /* NOTE: Dual-sided ready. */
>    read32(0 + addr_offset);
>    for (i = 0; i < 4; i++) {
>            reg8 = pci_read_config8(ctrl->d0, DRB + i);
>            if (reg8 != reg8_2)
>                    read32(reg8 * 32 * 1024 * 1024);
>            reg8_2 = reg8;
>    }
>
> The memory is detecting correctly, but I don't think coreboot can find the
> end of the side of the so-dimm, thus causing a lockup after Jumping to
> coreboot. I think I need to setup something more like the E7501
> do_ram_command() but I want to keep it simple. Here is the bootlog, Help??

You're right, change

read32(reg8 * 32 * 1024 * 1024);

to

read32((reg8 * 32 * 1024 * 1024) + addr_offset);

also, make sure reg8_2 is 0'd before entering the for loop.

-Corey