[coreboot] ram init help on the i82830

[Corey Osgood]

On Tue, May 27, 2008 at 10:27 PM, Joseph Smith <joe at settoplinux.org> 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
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