[coreboot-gerrit] Change in coreboot[master]: console: Override uart base address

[Angel Pons (Code Review)]

Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/45405 )

Change subject: console: Override uart base address
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Patch Set 3:

(1 comment)

https://review.coreboot.org/c/coreboot/+/45405/2/src/drivers/uart/uart8250io... 
File src/drivers/uart/uart8250io.c:

https://review.coreboot.org/c/coreboot/+/45405/2/src/drivers/uart/uart8250io... 
PS2, Line 78: static const unsigned int bases[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
> I was trying to understand how it changes to get to the best support. […]

I had an insane idea not too long ago: the `dynconfig()` macro

When there's no `dynconfig backend` (e.g. CMOS, VPD) to change options after building, this would be equivalent to the `CONFIG()` macro, and evaluate to a constant expression. However, if some `dynconfig backend` is enabled, then it would become a function call, which would retrieve the value through that backend. This would allow reusing the same Kconfig symbol names in the dynconfig backends (with some prefix to differentiate them from regular Kconfig symbols).

I didn't think about implementing this though, which is why I say it's an insane idea.