On 06.06.2016 23:40, Kyösti Mälkki wrote: > On Mon, Jun 6, 2016 at 10:36 PM, ron minnich <[email protected]> wrote: >> I'm getting the sense here that reasonably modern CPUs can easily handle the >> 2G hole. From what I've seen, it would not cause trouble for older CPUs >> because they're most likely to be in small systems that are not likely to >> have more than 2G memory anyway (I'm thinking of the vortex). >> > > Not that I would particularly care, but was i945 able to reclaim > memory from below 4GiB to above 4GiB? There used to be a fair amount > of Lenovo T60/X60(s) users. I don't think we should use the 2GiB limit for all x86 platforms. It's more a question for those platforms that are actively maintained and at least support PAE, IMO.
Regarding i945, I had a look at the code and there is a TOM register that's programmed to the total amount of DRAM. But sadly it's undocu- mented (at my level of NDA) and coreboot doesn't seem to advertise memory above 4GiB (I haven't tried it yet though). Nico -- coreboot mailing list: [email protected] https://www.coreboot.org/mailman/listinfo/coreboot
