[coreboot] [PATCH] v3: VIA C7 CAR

Carl-Daniel Hailfinger c-d.hailfinger.devel.2006 at gmx.net
Sat Oct 11 17:32:17 CEST 2008

On 11.10.2008 07:18, Peter Stuge wrote:
> Carl-Daniel Hailfinger wrote:
>> That XIP stuff needs a good explanation anyway. We may want to have
>> it cover the boot block only or the bootblock and initram. Either
>> way, reading the whole ROM to cache it may be less than useful and
>> a severe performance killer early on.
> XIP could never perform better than fetching from cache except if the
> cache is broken. I would like XIP on/off to be an expert option in
> Kconfig unless we can reliably detect cache failure at runtime and
> decide on XIP or not from that.

We have to differentiate between two issues here: Marking the ROM as
cached (good) and preemptively reading all of it to have it in cache

> On the other hand, too much logic this early on is not appealing.

I try to keep the complexity low. More patches will be forthcoming in
due time.



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