On Thu, Mar 04, 2010 at 10:05:57AM +0000, Mark Marshall wrote: > On 03/03/10 04:19, Keith Hui wrote: > >Hi all, > > > >This thing is now ready for more exposure. Scratch my previous "patch" - > >this is my first real deal. > > > >- Adds RAM detection for i440bx (based on i82830 code). We're no longer > >hard coded for 64MB on one row! > Hi. > > I've tried this with my ASUS P2B, and it's not quite there yet. > > The first problem is that this motherboard only has three DIMM > slots. This means you have to set SDRAMC to something different; > 0x0103 works for me. > > I'm guessing that we will need a motherboard config option for this > - there doesn't seem to be one suitable? Something like: > > src/mainboard/asus/p2b/Kconfig: > > config DIMM_SOCKETS > int > default 3 > depends on BOARD_ASUS_P2B
Yes, sounds good. We will either need this, or maybe the settings can be auto-detected / probed (need to check datasheet, but I guess it's unlikely). Hm, seems to be determined by SDRAMPWR + MMCONFIG, and MMCONFIG seems to be a hardware-strap (so we can check it), but not sure about SDRAMPWR. > The second problem is that it doesn't work with more that 256 MB of > memory. I've had one stick of 128 MB work, two sticks of 128 MB and > one stick of 256 MB all work, but two sticks of 256 MB doesn't boot > linux. Hm, will investigate. Are you sure both 256MB DIMMs work under vendor BIOS (so we can exclude hardware issues)? Thanks for testing! Uwe. -- http://www.hermann-uwe.de | http://www.randomprojects.org http://www.crazy-hacks.org | http://www.unmaintained-free-software.org -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
