On Wed, Dec 24, 2008 at 12:13 AM, Corey Osgood <[email protected]>wrote:
> On Tue, Dec 23, 2008 at 11:59 PM, ron minnich <[email protected]> wrote: > >> On Tue, Dec 23, 2008 at 8:40 PM, Corey Osgood <[email protected]> >> wrote: >> > John Kollasch just pointed out to me that it looks like the reason the >> cn700 >> > is booting so slowly (>15min) could be that it's running out of flash. >> I've >> > also noticed this: >> > >> > LAR: Attempting to open 'normal/stage2/segment0'. >> > LAR: Start 0xfff00000 len 0x100000 >> > LAR: seen member normal/option_ta...@0xfff00000, size 932 >> > LAR: seen member normal/initram/segme...@0xfff00400, size 6216 >> > LAR: seen member normal/stage2/segme...@0xfff01ca0, size 1 >> > >> > With a 1MB flash part, so 0xfff00000 is the ROM. Is this how it's >> supposed >> > to work, and if not, how do we fix it? >> > >> >> I think the problem is you are not caching flash or anything else for >> that matter. > > > What should I be doing where? I can enable, disable, or make the shadow ram > dance like a monkey (yeah, Via hardware's got some odd features), but it > makes no real difference in the boot speed. > Sorry if this came off as rude, it was supposed to be a joke. I'm still confused on caching though, where/how it should be done, I'm trying to find how it's done on geode and coming up empty handed. > >> I wonder if moving mtrr out of stage0 was the right move? >> > > The only other option AFAIK is to go back to ROMCC, CAR uses those MTRRs > and enabling them breaks CAR. > > >> >> initram has to run from flash. It is execute in place. Stage2 is >> copied to dram. > > > Is the whole flash copied to dram once, or are the segments copied as their > needed? LAR is saying it's opening the segments directly from flash > (0xfff00000). > Nevermind that question, I just (finally) found the code that handles that, and that is how it works, the segment is loaded from the ROM right before it's run. Is there any advantage/disadvantage to doing it that way instead of copying the whole LARball once and walking on RAM? Thanks, Corey
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