[coreboot] ram init help on the i82830
Corey Osgood
corey.osgood at gmail.com
Wed May 28 06:04:14 CEST 2008
Actually, lets get some more debugging info, in case that doesn't work. One
quick question though:
60: 08 10 12 12 12 12 00 00 00 00 00 00 00 00 00 00
Are 0x64 and 0x65 also DRBs? Or they just happen to also be 0x12? Either
way, this should work, but it will only work for up to 2 sticks. I've gotten
rid of the dual sided junk, I'm about 98% sure it's not necessary, so it now
just reads the start of the dimm (instead of row) and reads from that.
Please try a memtest payload, if this boots, just to make sure it's working
right.
read32(0 + addr_offset);
/* See if there are 2 sticks */
reg8 = pci_read_config8(ctrl->d0, DRB + 1);
reg8_2 = pci_read_config8(ctrl->d0, DRB + 2);
if(reg8 != reg8_2) {
PRINT_DEBUG("Sending command to DIMM1 at 0x");
PRINT_DEBUG_HEX32((reg8 * 32 * 1024 * 1024) + addr_offset);
PRINT_DEBUG("/r/n);
read32((reg8 * 32 * 1024 * 1024) + addr_offset);
}
-Corey
On Tue, May 27, 2008 at 11:40 PM, Corey Osgood <corey.osgood at gmail.com>
wrote:
>
>
> 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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