Vincenzo Scianni a écrit :

Hi to everyone.

I have a general question: my need is to use u-boot to initialize a PowerPC 5123 and then to continue with a custom kernel without Linux. The problem is that during initialization I must drive very early a graphical controller by PCI to show some logos and I need of mathematical library;

What kind of logo display requires math? You're going to display a bitmap probably, so the only math involved would be integer arithmetic, I think. And if you have a logo in vector form, then you can convert it to bitmap (adapted to your FB format) offline and link the bitmap from, not the vector, in u-boot.

I suspect that u-boot doesn't support any.

I suspect you're right.

First question there exist one compatible with u-boot ?

Don't know.

In your opinion is it possible to follow idea of import a mathematical library to boot and draw something and after continue with a custom kernel ?

No reason why you could not; but I think that's a waste of FLASH and cycles, and you'd be better of turning your logo into a simple bitmap format that u-boot possibly already understands.

There is some deep technical reason to load a Linux kernel and then plot a logo ?

No reason for this, but again, no reason (that I can see from your description) that you'd need math in the first place. Can you elaborate on the reason that makes you need math onboard rather than off-board?

Amicalement,