[coreboot] Re: Change Romsize and CBFS size.

Hi Nico,

Nico Huber wrote:
> Hi Nitin,
>
> On 11.06.20 18:44, nitin.ramesh.singh(a)gmail.com wrote:
> > Flash start  -> 0xFC000000 (with-in 4GB space
> > @4227858432)
>
> this is misleading. Setting it in the FMAP makes sense to make the
> calculations work, but the flash is not mapped there.
>
> Because of other fixed resources below 0xff000000, the architectural
> limit of memory-mapped flash space is 16MiB. Some chipsets even limit
> the mapping to 8MiB. Without making changes to coreboot code (e.g.
> switch from memory mapped flash access to using the SPI controller),
> all coreboot regions have to fall into the memory mapped space.

I am aware about the given fact... just wanted to describe the way fmap is being arranged.
https://www.coreboot.org/Developer_Manual/Memory_map
> > Can any one please let me know what are the other
> > changes required to incorporate the Coreboot image as per the given layout?
>
> Generally, such a big CBFS seems odd. I think changes are better made
> outside of coreboot, e.g. the payload. What is your exact use case?
>
> Nico

I am using the direct-grub payload (which incorporates cbfs with a limitation of maximum 16MB memory mapped flash space), plus I want to package few other binaries.

Thanks,
Nitin