Thanks for sharing your findings. THe flash is 256K big, which is quite small these days.

When building coreboot with default settings but without a payload I find that there is 69K empty space left for payloads.

Some future developments I have been working on might give a bit more breathing space.

- I want to make romstage optional and include the sources in the bootblock: That should shave off roughly 10K of romstage.

- I have compressing postcar working (maybe you can also disable the postcar console to reduce size). That's also 2-3k size gains

at likely the const of a tiny bit of boot performance on this platform.

- I also have some WIP code to merge postcar into ramstage which would save 15k.

Maybe on coreboot release 4.15 you will have a better time building a fully working image with the default configuration.

Kind regards

Arthur Heymans

On Fri, May 21, 2021 at 7:08 AM Paul Menzel <pmenzel@molgen.mpg.de> wrote:

Dear Branden,

Am 21.05.21 um 05:36 schrieb Branden Waldner:
> When testing the latest coreboot code before the 4.14 release, I found
> I couldn't build a working image with the default (or what I usually
> use) config for the asus/p2b. I figured out that it failed to build
> with an error of not enough space in cbfs after the merge to enable
> bootblock console for intel 440bx.
> Following this, I just disabled microcode firmware to free up space
> and it worked fine, even without the microcode update. Specifically
> selecting the microcode for the cpu I'm using would probably be better
> though.
> I'm just commenting on my findings, not really expecting anything. I
> had intended on trying to obtain some larger flash chips yet, though I
> never got around to it. It would still leave a broken default build
> config though with the standard rom size.

Thank you for sharing your findings. All default configurations are
tested – without a payload though I believe –, so please attach your
configuration, `defconfig` created by `make savedefconfig`, and your
payload and size.

Kind regards,

Paul
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